Render "Digital Clock Style" Numbers

Question

Write the shortest program which will take a string of numbers (of up to at least 20 length) as input, and display the output using the standard digital clock style numbers. For instance for input 81, a solution with ascii output would give:

 _
|_|  |
|_|  |

Graphical output is also acceptable, if it helps.

Answer 1

APL (Dyalog) (45)

{3 3⍴' _|'[1+⍵⊤⍨9⍴3]}¨⎕UCS'ા8धगɯે૙ࣃଏ૽'[1+⍎¨⍞]

The string, ા8धगɯે૙ࣃଏ૽, are the unicode characters 2750 56 2343 2327 623 2759 2777 2243 2831 2813 (however, you should be able to just copy and paste it). They encode the numbers. The program reads a line from the keyboard.

Explanation:

• 1+⍎¨⍞: read a line from the keyboard, parse each character as a digit, then add 1 to each number (APL arrays are 1-based by default).
• ⎕UCS'ા8धगɯે૙ࣃଏ૽'[...]: Select the characters belonging to the digits of the numbers you entered, and look up the Unicode values.
• {...}¨: for each of these values, do:
• 1+⍵⊤⍨9⍴3: get the first 9 base-3 digits from the value as expressed in base-3, and add 1 (because the arrays ar 1-based).
• ' _|'[...]: select a space, horizontal line, or vertical line depending on these digits
• 3 3⍴: format as a 3-by-3 box.

Answer 2

Funciton

Not really a language suitable for golfing... but regardless, I tried to keep the code size as small as I could — quite a different challenge than in “usual” languages. This is 1555 characters or 3110 bytes (if encoded as UTF-16; UTF-8 is larger).

Here’s a screenshot of the program running. It really works :)

Since this looks ugly in StackExchange due to the extra line spacing, consider running the following code in your browser’s JavaScript console to fix that: $('pre').css('line-height',1)

     ╓─╖ ╔╗┌─╖   ┌─╖
     ║ʜ║ ║╟┤↔╟┐ ┌┤‼╟┐
     ╙┬╜ ╚╝╘═╝│ │╘╤╝│
╔═╗  ┌┴────┐  │┌┴╖ ┌┴╖
║0║ ┌┴─┐  ┌┴─┐└┤ʜ╟─┤·╟┐
╚╤╝┌┴╖┌┴╖┌┴╖┌┴╖╘╤╝ ╘╤╝│
┌┘┌┤·╟┤ɦ╟┤·╟┤?╟ │  ┌┴╖│
│ │╘╤╝╘╤╝╘╤╝╘╤╝ └──┤‼╟┘
│┌┴╖│ ┌┴╖┌┘╔═╧╗    ╘═╝
└┤?╟┘┌┤?╟┘┌╢10║    ┌─────────┐
 ╘╤╝ │╘╤╝┌┘╚══╝ ┌─┬┘╔══╗┌──╖┌┴╖ ╓─╖
  ┘  └───┘╔════╗│┌┴┐║21╟┤>>╟┤·╟┐║ɦ║
╔════════╗║1005╟┘└┬┘╚══╝╘═╤╝╘╤╝│╙┬╜        ┌─┐
║14073768║╚════╝ ┌┴╖ ┌─╖ ┌┴╖┌┴╖└─┴─────────┘┌┴╖
║7584800 ╟───────┤?╟─┤‼╟─┤ʜ╟┤·╟─────────────┤·╟┐╔═══════╗╔══╗
╚════════╝       ╘╤╝ ╘╤╝ ╘╤╝╘╤╝    ╔══╗┌─╖┌┐╘╤╝│║2097151║║21╟┐
 ╔═══════════════╗│   ┘   │  │     ║48╟┤−╟┤├─┤┌┘╚══╤════╝╚══╝│
 ║140737555464224╟┘  ┌────┘┌┬┘     ╚══╝╘╤╝└┘┌┘│╓─╖ │┌┐┌─╖┌─╖┌┴─╖
 ╚═══════════════╝   │ ┌───┘└─────────┐┌┴─╖ │┌┘║↔║ ├┤├┤‼╟┤↔╟┤>>║
┌────────────┐┌────┐┌┴╖│┌────────────┐├┤<<║ ││ ╙┬╜┌┘└┘╘╤╝╘═╝╘╤═╝
│   ╔══╗╔═══╗├┘╓─╖ └┤·╟┘│   ╔══╗╔═══╗├┘╘╤═╝ │└─┐└─┤╔═╗┌┴╖ ┌──┘
│   ║95║║892║│┌╢‡╟┐ ╘╤╝ │   ║95║║877║│ ┌┘╔══╧═╗│  │║0╟┤?╟┬┘
│   ╚═╤╝╚═╤═╝││╙─╜│  │  │   ╚═╤╝╚═╤═╝│╔╧╗║2097║│  │╚═╝╘╤╝│
│╔══╗┌┴╖┌┐│  ││┌─╖│ ┌┴╖ │╔══╗┌┴╖┌┐│  │║1║║151 ║│  └──────┘
│║32╟┤?╟┤├┤  │└┤‼╟┘┌┤‡║ │║32╟┤?╟┤├┤  │╚═╝╚════╝│
│╚══╝╘╤╝└┘└──┴┐╘╤╝ │╘╤╝ │╚╤═╝╘╤╝└┘└──┴┐      ┌─┘
│    ┌┴╖     ┌┴╖┌─╖│ │ ┌┴╖│  ┌┴╖     ┌┴╖ ┌─╖┌┴╖
│    │‼╟─────┤·╟┤‼╟┘ │┌┤·╟┘  │‼╟─────┤·╟─┤‼╟┤‡║
└┐┌┐ ╘╤╝     ╘╤╝╘╤╝  ││╘╤╝┌┐ ╘╤╝     ╘╤╝ ╘╤╝╘╤╝
 ├┤├┐┌┴╖╔══╗  └──┐┌┐ │└┐├─┤├┐┌┴╖╔══╗  ├──┐└  │
 │└┘└┤?╟╢32║╔═══╗├┤│┌┴╖││ └┘└┤?╟╢32║╔═╧═╗│┌┐┌┴╖╔══╗
╔╧══╗╘╤╝╚══╝║881╟┘│├┤?╟┘│    ╘╤╝╚══╝║325║└┤├┤?╟╢32║
║927║╔╧══╗  ╚═══╝ └┘╘╤╝╔╧═══╗╔╧══╗  ╚═══╝ └┘╘╤╝╚══╝
╚═══╝║124╟───────────┘ ║1019║║124╟───────────┘
     ╚═══╝             ╚════╝╚═══╝

It could probably be smaller if I hadn’t made a mistake due to which the output was back to front; I fixed that by adding an extra function to reverse the input. Otherwise I would probably have to rewrite all of it.

I also made another mistake (swapping the operands in two calls to ‼) which made it necessary to declare the extra ‡ function, but this one is so small it fits inside the main function and thus doesn’t add any characters!

Answer 3

wxpython, many characters

import wx, wx.gizmos as g

class T(wx.Frame):
 def __init__(_):
  wx.Frame.__init__(_, None, size = (800, 60))
  l = g.LEDNumberCtrl(_, -1)
  l.Value = raw_input()

class M(wx.App):
 def OnInit(_):
  T().Show()
  return 1

M().MainLoop()

Test

echo -n 81 | python codegolf-997-wx.py

ps: not a serious entry, but looks like graphical output is also acceptable, so I just gave it a try :-)

Answer 4

J, ^{90, 78} 68 chars

[ update: using unicode (1 byte) encoding:

,./(10 3 3$((90$3)#:256#.24x-~3&u:'%ė¨ÔW/~º»sy¡ăì<t÷²'){' _|'){~"./.Y
NB. utf characters are: 37 279 168 212 87 47 126 186 187 115 121 161 259 236 60 116 247 178

works as before: ]

,./(10 3 3$((90$3)#:1219424106940570763878862820444729939648410x){' _|'){~"./. '58321'
 _  _  _  _    
|_ |_| _| _|  |
 _||_| _||_   |

The key is in the encoding of digits as base-3 integers. Zero, for example is:

:
 _ 
| |
|_|

or ' _ | ||_|', which becomes 010202212₃ = 2750.

Answer 5

Golfscript - 66 chars

"placeholder text for userscript which counts chars             ";

xxd: (use xxd -r to revert)

0000000: 332c 7b3a 533b 2e7b 3438 2d22 5e70 285d  3,{:S;.{48-"^p(]
0000010: 7025 d3c4 4ab1 7d4a b8dc 4469 ce41 2222  p%..J.}J..Di.A""
0000020: f303 227b 6261 7365 7d2f 3330 2f53 3d33  .."{base}/30/S=3
0000030: 2f3d 7b22 5f20 7c22 3d7d 257d 256e 407d  /={"_ |"=}%}%n@}
0000040: 2f3b                                     /;

This follows most of the other answers in that there are no spaces between numbers and trailing spaces are kept in. A space between numbers can easily be added with 1+ before {"_ |"=}%. Packed into a base 3 number, and then as base 243 into a string.

Answer 6

Mathematica 205 209 198 179

i = IntegerDigits; t = Thread; r = Rule;
z@n_ := Row@i@n /. t[r[Range[0, 9], Grid[Partition[ReplacePart[Characters@" _ |_||_|", 
t[r[#, ""]]], 3], Spacings -> 0] & 
/@ (i /@ {5, 24578, 49, 47, 278, 67, 6, 4578, , 78})]]

Usage

z@1234567890

Answer 7

JavaScript (145)

148 145

Since JavaScript doesn’t really have standard input/output, this is written as a function that takes a string and returns the output as a string.

function r(n){for(i=o="",b=" |_\n|",L=n.length;i<3*L;)o+=b[(c="ǪĠòƲĸƚǚĢǺƺ".charCodeAt(n[i%L])>>(i++/L|0)*3)&1]+b[c&2]+b[c&4]+b[i%L?0:3];return o}

Spaced out:

function r(n)
{
    for (i = o = "", b = " |_\n|", L = n.length;   i < 3*L;   )
        o += b [ (c = "ǪĠòƲĸƚǚĢǺƺ".charCodeAt(n[i%L]) >> (i++/L|0)*3) & 1 ] +
             b [ c&2 ] +
             b [ c&4 ] +
             b [ i%L ? 0 : 3 ];  // space or newline
    return o
}

Here’s how it works:

• Every digit shape is encoded in a Unicode character consisting of 9 bits.

• The first three bits are for the first row, etc.

• In each group of three bits, the first specifies whether the first character is | or space, the second whether it’s _ or space, and the third again | or space.

• These three bits are retrieved as c&1, c&2 and c&4, which are then used as indexes into the string b.

• At each iteration, i%L is the “x-coordinate”, i.e. the digit within the input n

• At each iteration, i/L is the “y-coordinate”, i.e. the row, but we need |0 to make it an integer

• Finally, the spaces between the digits and the newlines between the lines are also retrieved by indexing into b, re-using the space character and the otherwise unused position 3 in that string! :)

Answer 8

Ruby, 142

' _     _  _     _  _  _  _  _ 
| |  | _| _||_||_ |_   ||_||_|
|_|  ||_  _|  | _||_|  ||_| _|'.lines{|l|puts x.chars.map{|i|l[i.to_i*3,3]}*''}

expects input in the variable x. examples:

x = '321'
#  _  _    
#  _| _|  |
#  _||_   |

x = '42'
#      _ 
#  |_| _|
#    ||_ 

Answer 9

Windows PowerShell, 127

$i="$input"[0..99]
'☺ ☺☺ ☺☺☺☺☺','♠☻♥♥♦♣♣☻♦♦','♦☻♣♥☻♥♦☻♦♥'|%{$c=$_
""+($i|%{('···0·_·0··|0·_|0|_|0|_·0|·|'-split0)[$c[$_-48]]})}

Since the strings contain some unpleasant-to-write characters, a hexdump for your convenience:

000: 24 69 3D 22 24 69 6E 70 │ 75 74 22 5B 30 2E 2E 39  $i="$input"[0..9
010: 39 5D 0A 27 01 00 01 01 │ 00 01 01 01 01 01 27 2C  9]◙'☺ ☺☺ ☺☺☺☺☺',
020: 27 06 02 03 03 04 05 05 │ 02 04 04 27 2C 27 04 02  '♠☻♥♥♦♣♣☻♦♦','♦☻
030: 05 03 02 03 04 02 04 03 │ 27 7C 25 7B 24 63 3D 24  ♣♥☻♥♦☻♦♥'|%{$c=$
040: 5F 0A 22 22 2B 28 24 69 │ 7C 25 7B 28 27 20 20 20  _◙""+($i|%{('
050: 30 20 5F 20 30 20 20 7C │ 30 20 5F 7C 30 7C 5F 7C  0 _ 0  |0 _|0|_|
060: 30 7C 5F 20 30 7C 20 7C │ 27 2D 73 70 6C 69 74 30  0|_ 0| |'-split0
070: 29 5B 24 63 5B 24 5F 2D │ 34 38 5D 5D 7D 29 7D     )[$c[$_-48]]})}

Answer 10

gForth, 186 175 chars

New version:

: s query parse-word bounds s" D@DD@DDDDDb`ddfFF`fff`Fd`df`f`" bounds do cr 2dup do i c@ '0 - j + c@ 3 0 do dup 3 and s"  _|" drop + 1 type 4 / loop drop loop 10 +loop bye ; s

This actually bothers to exit (+3 chars) as well :). Here is the more readable version, it does some bit-packing to reduce the LUT size by 1/3, but the resulting code is more complex so it's not much of a savings:

: 7s query parse-word bounds 
    s" D@DD@DDDDDb`ddfFF`fff`Fd`df`f`"
    bounds do 
        cr
        2dup do
            i c@ '0 - j + c@
            3 0 do
                dup 3 and
                s"  _|" drop + 1 type
                4 / \ shorter than an rshift
            loop
            drop
        loop
    10 +loop bye ;
7s

Old version:

: s query parse-word bounds s"  _     _  _     _  _  _  _  _ | |  | _| _||_||_ |_   ||_||_||_|  ||_  _|  | _||_|  ||_|  |" bounds do cr 2dup do i c@ '0 - 3 * j + 3 type loop 30 +loop ; s

This leaves the stack unbalanced and doesn't bother to exit the interpreter. Here is a cleaner more readable version

: 7s query parse-word bounds 
    s"  _     _  _     _  _  _  _  _ | |  | _| _||_||_ |_   ||_||_||_|  ||_  _|  | _||_|  ||_|  |"
    bounds do 
        cr
        2dup do
            i c@ '0 - 3 * j + 3 type
        loop
    30 +loop 2drop bye ;
7s

Answer 11

Golfscript - 97 chars

:*{32' _':$@'14'{?~!=}:&~32}%n*{:x' |':|\'1237'&$x'017'&|x'56'&}%n*{:x|\'134579'&$x'147'&|x'2'&}%

Answer 12

Java, 2,095

public class DigitalNumber {
    public static void main(String args[]){
        char[][] panel = new char[3][120]; //A 20 digit panel!
        int digXIndex = 0;int digYIndex = 0;
        for (int i=0;i<args[0].length(); i++){
            int dig=Integer.parseInt(""+args[0].charAt(i));
            panel[digXIndex][digYIndex]=32;   
            digYIndex++;
            if (dig!=1 && dig!=4)
                panel[digXIndex][digYIndex]='_';  
            else
                panel[digXIndex][digYIndex]=32;
            digYIndex++;
                panel[digXIndex][digYIndex]=32; 
            digYIndex=3*i;
            digXIndex++;
            if (dig!=1 && dig!=2 && dig!=3 && dig!=7)
                panel[digXIndex][digYIndex]='|';    
            else
                panel[digXIndex][digYIndex]=32;
            digYIndex++;
            if (dig!=1 && dig!=0 && dig!=7)
                panel[digXIndex][digYIndex]='_';    
            else
                panel[digXIndex][digYIndex]=32;
            digYIndex++;
            if (dig!=6 && dig!=5)
                panel[digXIndex][digYIndex]='|';  
            else
                panel[digXIndex][digYIndex]=32;
            digYIndex=3*i;
            digXIndex++;
            if (dig!=6 && dig!=8 && dig!=2 && dig!=0)
                panel[digXIndex][digYIndex]=32;  
            else
                panel[digXIndex][digYIndex]='|';
            digYIndex++;
            if (dig!=7 && dig!=4 && dig!=1)
                panel[digXIndex][digYIndex]='_';  
            else
                panel[digXIndex][digYIndex]=32;
            digYIndex++;
            if (dig!=2)
                panel[digXIndex][digYIndex]='|';  
            else
                panel[digXIndex][digYIndex]=32;
            digXIndex=0;
            digYIndex+=(i*3)+1;
        }       
        for (int i=0; i<3; i++){
            for (int j=0; j<120; j++)
                if (panel[i][j]!=0)
                System.out.print((char)(panel[i][j]));
                else
                    System.out.print("");
            System.out.println();
        }   
    }
}

SAMPLE I/O

java DigitalNumber 98765432109876543210
     _  _  _  _  _     _  _     _  _  _  _  _  _     _  _     _ 
    |_||_|  ||_ |_ |_| _| _|  || ||_||_|  ||_ |_ |_| _| _|  || |
     _||_|  ||_| _|  | _||_   ||_| _||_|  ||_| _|  | _||_   ||_|

Answer 13

C# 369 Characters

static void Main(string[] a){var b = new[] {123,72,61,109,78,103,119,73,127,111};var g = new[]{" _  ","|","_","| ","|","_","| "};a[0].ToCharArray().SelectMany((x,w)=>g.Select((y,i)=>new{s=((b[x-48]>>i&1)==1)?y:new String(' ',y.Length),j=i,v=w})).GroupBy(z=>(z.j+2)/3).ToList().ForEach(q=>Console.WriteLine(String.Join("", q.OrderBy(l=>l.v).Select(k=>k.s).ToArray())));}

I could easily cut a few characters out. The point was more to abuse LINQ :)

More whitespace version:

static void Main(string[] a)
{
    var b = new[] {123, 72, 61, 109, 78, 103, 119, 73, 127, 111};
    var g = new[] { " _  ", "|", "_", "| ", "|", "_", "| " };
    a[0].ToCharArray().SelectMany(
        (x,w)=>g.Select(
           (y,i)=>new{s=((b[x-48]>>i&1)==1)?y:new String(' ',y.Length),j=i,v=w}))
            .GroupBy(z=>(z.j+2)/3).ToList().ForEach(
            q=>Console.WriteLine(
                String.Join("", q.OrderBy(l=>l.v).Select(k=>k.s).ToArray())));
}

Answer 14

Java Solution: 585 570 Chars

I don't think I'll be attempting any more golfing in Java...

import java.util.*;
public class CG997{public static void main(String[]args){
short[][]lets=new short[][]{{0,1,3,2,0,4,2,1,4},{0,0,3,0,0,4,0,0,4},{0,1,3,0,1,
4,2,1,3},{0,1,3,0,1,4,0,1,4},{0,0,3,2,1,4,0,0,4},{0,1,3,2,1,3,0,1,4},{0,1,3,2,1
,3,2,1,4},{0,1,3,0,0,4,0,0,4},{0,1,3,2,1,4,2,1,4},{0,1,3,2,1,4,0,0,4}};
String[]syms=new String[]{" ","_","|","  ","| "};
String s=new Scanner(System.in).nextLine();
for(int o=0;o<3;o++){for(char c:s.toCharArray()){for(int i =0;i<3;i++)
System.out.print(syms[lets[Short.parseShort(c+"")][i+o*3]]);
}System.out.println();}}}

Answer 15

Python, 218 180 176

b=map(int,raw_input());a=map(int,bin(914290166014670372457936330)[2:]);c=' |_';p=lambda k:''.join(c[a[9*n+k]]+c[2*a[9*n+1+k]]+c[a[9*n+2+k]]for n in b)+'\n';print p(6)+p(0)+p(3)

With line breaks:

b=map(int,raw_input())
a=map(int,bin(914290166014670372457936330)[2:])
p=lambda k:''.join(' |'[a[9*n+k]]+' _'[a[9*n+1+k]]+' |'[a[9*n+2+k]]for n in b)+'\n'
print p(6)+p(0)+p(3)

Answer 16

Bash, 11 characters

toilet "$i"

Yes I know, I'm cheating.

You need to have toilet installed.

Answer 17

D: 295 Characters

import std.stdio;void main(string[]a){string[3]o;foreach(c;a[1]){int n=cast(int)(c)-48;auto e=" ";o[0]~=n!=1&&n!=4?" _ ":"   ";o[1]~=!n||n>3&&n!=7?"|":e;o[1]~=n>1&&n!=7?"_":e;o[1]~=n<5||n>6?"|":e;o[2]~=!(n&1)&&n!=4?"|":e;o[2]~=!n||n>1&&n!=4&&n!=7?"_":e;o[2]~=n!=2?"|":e;}foreach(l;o)writeln(l);}

More Legibly:

import std.stdio;

void main(string[] a)
{
    string[3] o;

    foreach(c; a[1])
    {
        int n = cast(int)(c) - 48;
        auto e = " ";

        o[0] ~= n != 1 && n != 4 ? " _ " : "   ";

        o[1] ~= !n || n > 3 && n != 7 ? "|" : e;
        o[1] ~= n > 1 && n != 7 ? "_" : e;
        o[1] ~= n < 5 || n > 6 ? "|" : e;

        o[2] ~= !(n&1) && n != 4 ? "|" : e;
        o[2] ~= !n || n > 1 && n != 4 && n != 7 ? "_" : e;
        o[2] ~= n != 2 ? "|" : e;
    }

    foreach(l; o)
        writeln(l);
}

Answer 18

PHP, 140 136 133 131 129 128 bytes

^{I could save 5 7 more with extended ascii: one each for "| _" and the linebreak, three for ~"z/]{4lno~|" (bitwise negation would turn everything to extended ascii characters = no special characters, and PHP doesn´t need quotes there), two for -1 (it´s only there to keep the map in standard ascii). But for readability and compatibility, I stay with standard ascii.}

for(;""<$c=$argv[1][$i++];)for($n=753754680;$n>>=3;)$r[$p++%3].="| _"[ord(~"z/]{4lno~|"[$c])-1>>$n%8&1?:$n&2];echo join("
",$r);

the bitmap

• Take LEDS _,|_|, |_| as bits -6-,024,135 (bit number &2 is 0 for vertical LEDs)
• Create bitmaps for numbers 0..9: [123,48,94,124,53,109,111,112,127,125]
• Decrease by 1 to make them all printable ascii codes -> "z/]{4lno~|"
• negate -> ~"z/]{4lno~|" (allows ternary shorthand in character selection)

the template

• use 7 for the spaces -> 767,024,135
• regroup by columns instead of rows -> 701,623,745 (renders $p=0 obsolete)
• reverse -> 547326107 (read the map from right to left; allows arithmetic looping)
• append zero -> 5473261070 (allows to combine shift with test in loop head)
• read octal, convert to decimal -> 753754680 (two bytes shorter: one digit and the prefix)

breakdown

for(;""<$c=$argv[1][$i++];) // loop through input characters
    for($n=753754680;$n>>=3;)   // loop through template
        $r[$p++%3].="| _"[          // append character to row $p%3:
            ord(~"z/]{4lno~|"[$c])-1// decode bitmap
                >>$n%8&1            // test bit $n%8 (always 1 for bit 7)
            ?                       // if set: 1 (space)
            :$n&2                   // else: 2 (underscore) for bits 2,3,6; 0 (pipe) else
        ];
echo join("\n",$r);         // print result

Answer 19

Java 8, 280 bytes

interface M{static void main(String[]a){String x="",y=x,z=x;for(int c:a[0].getBytes()){c-=48;x+=" "+(c==4|c==1?" ":"_")+" ";y+=(c==7|c>0&c<4?" ":"|")+(c==7|c<2?" ":"_")+(c>4&c<7?" ":"|");z+=(c%2<1&c!=4?"|":" ")+(c%3==1?" ":"_")+(c==2?" ":"|");}System.out.print(x+"\n"+y+"\n"+z);}}

Explanation:

Try it here.

interface M{                     // Class
  static void main(String[]a){   //  Mandatory main-method
    String x="",                 //   String for row 1, starting empty
           y=x,                  //   String for row 2, starting empty
           z=x;                  //   String for row 3, starting empty
    for(int c:a[0].getBytes()){  //   Loop over the bytes of the input
      c-=48;                     //    Convert the byte to integer
      x+=                        //    Append to row 1:
         " "                     //     a space
         +(c==4|c==1?            //     +If the digit is a 1 or 4:
            " "                  //       Append a space
           :                     //      Else:
            "_")                 //       Append an underscore
         +" ";                   //     + another space
      y+=                        //    Append to row 2:
         (c==7|c>0&c<4?          //      If the digit is 1, 2, 3, or 7:
           " "                   //       Append a space
          :                      //      Else:
           "|")                  //       Append a pipe
         +(c==7|c<2?             //     +If the digit is 0, 1, or 7:
            " "                  //       Append a space
           :                     //      Else:
            "_")                 //       Append an underscore
         +(c>4&c<7?              //     +If the digit is 5 or 6:
            " "                  //       Append a space
           :                     //      Else:
            "|");                //       Append a pipe
      z+=                        //    Append to row 3:
         (c%2<1&c!=4?            //      If the digit is 0, 2, 6 or 8:
           "|"                   //       Append a pipe
          :                      //      Else:
           " ")                  //       Append a space
          +(c%3==1?              //     +If the digit is 1, 4, or 7:
             " "                 //       Append a space
            :                    //      Else:
             "_")                //       Append a pipe
          +(c==2?                //     +If the digit is 2:
             " "                 //       Append a space
            :                    //      Else:
             "|");               //       Append a pipe
    }                            //   End of loop
    System.out.print(x+"\n"+y+"\n"+z);
                                 //   Print the three rows
  }                              //  End of main-method
}                                // End of class

As function this would be 218 bytes instead.

Answer 20

Delphi || 453 (568 With format)

Not even close enough to win but it was fun to do ^.^

const asc: array[0..9] of array[0..2] of string = ((' _ ','| |','|_|'),('   ','  |','  |'),(' _ ',' _|','|_ '),(' _ ',' _|',' _|'),('   ','|_|','  |'),(' _ ','|_ ',' _|'),(' _ ','|_ ','|_|'),(' _ ','  |','  |'),(' _ ','|_|','|_|'),(' _ ','|_|',' _|'));var s,l:string;x,i:integer;begin Readln(s);s:=StringReplace(s,' ','',[rfReplaceAll]);for I := 0 to 2 do begin l:='';for x := 1 to length(s) do l := l + asc[StrToInt(s[x])][i];writeln(l);end;readln;end.  

With format

const
asc: array[0..9] of array[0..2] of string = (
  (' _ ','| |','|_|'),
  ('   ','  |','  |'),
  (' _ ',' _|','|_ '),
  (' _ ',' _|',' _|'),
  ('   ','|_|','  |'),
  (' _ ','|_ ',' _|'),
  (' _ ','|_ ','|_|'),
  (' _ ','  |','  |'),
  (' _ ','|_|','|_|'),
  (' _ ','|_|',' _|'));
var
s,l:string;
x,i:integer;
begin
    Readln(s);
    s:=StringReplace(s,' ','',[rfReplaceAll]);
    for I := 0 to 2 do
    begin
      l:='';
      for x := 1 to length(s) do
        l := l + asc[StrToInt(s[x])][i];
      writeln(l);
    end;
    readln

end.

Answer 21

Ocaml, 268

let t=function|'1'|'4'->"   "|_->" _ "let m=function|'0'->"| |"|'1'|'7'->"  |"|'2'|'3'->" _|"|_->"|_|"|'5'|'6'->"|_ "let b=function|'0'|'8'->"|_|"|'1'|'4'|'7'->"  |"|'2'->"|_ "|_->" _|"let f s=let g h=String.iter(fun c->print_string(h c))s;print_newline()ing t;g m;g b

Readable version

let t = function
  | '1'
  | '4' -> "   "
  | _ -> " _ "
let m = function
  | '0' -> "| |"
  | '1'
  | '7' -> "  |"
  | '2'
  | '3' -> " _|"
  | _ -> "|_|"
  | '5'
  | '6' -> "|_ "
let b = function
  | '0'
  | '8' -> "|_|"
  | '1'
  | '4'
  | '7' -> "  |"
  | '2' -> "|_ "
  | _ -> " _|"
let f s =
  let g h =
    String.iter (fun c -> print_string (h c)) s;
    print_newline () in
  g t;
  g m;
  g b

Answer 22

Perl (182 180)

#!perl -l
$_=<<7;
 _     _  _     _  _  _  _  _ 
| |  | _| _||_||_ |_   ||_||_|
|_|  ||_  _|  | _||_|  ||_| _|
7
@b=map{[/(...)/g]}split/\n/;@d=split//,<>;for$p(@b){print map$p->[$_],@d}

reads from STDIN.

$ perl 7segment.pl 
1234567890987654321
    _  _     _  _  _  _  _  _  _  _  _  _  _     _  _     _ 
  | _| _||_||_ |_   ||_||_|| ||_||_|  ||_ |_ |_| _| _|  || |
  ||_  _|  | _||_|  ||_| _||_| _||_|  ||_| _|  | _||_   ||_|

Answer 23

Ghostscript (270) (248) (214)

Edit: More substitutions. Removed space between digits.

Edit: Even more substitutions. Main loop now looks like what it does!

/F{forall}def[48<~HUp;::1ncBInp~>{1 index 1 add}F
pop/*{dup
2 idiv exch
2 mod
1 eq}/P{print}/#{( )P}/?{ifelse
P}/O{{( )}?}/|{*{(|)}O}/_{*{(_)}O}>>begin[[[[ARGUMENTS{{load
# _ #}F()=]2{{| _ |}F()=]}repeat]pop[[[[}F

Uses ghostscript's argument-processing feature: invoke with gs -dNODISPLAY -- digit.ps 012 345 6789.

Answer 24

SmileBASIC, 216 bytes

?INPUT N$DIM A[14]COPY A,@A@A
DATA 1,0,0,1,3,1,1,3,0,4,3,4,1,6FOR D=0 TO LEN(N$)-1X=ASC("w$]m.k{%\o"[VAL(N$[D])])FOR I=0TO 6T=I*2IF X<<31THEN GBOX A[T]+D*5,A[T+1],A[T]+D*5+!(I MOD 3),A[T+1]+!!(I MOD 3)
X=X/2NEXT
NEXT

Using graphics instead of text, because it's probably shorter.

Explanation:

PRINT 'so the input and output don't overlap
INPUT NUMBER$ 'get number
DIM PTS[7*2] 'locations of segments
COPY PTS,@PTDATA 'copy data into array
@PTDATA
DATA 1,0,0,1,3,1,1,3,0,4,3,4,1,6 'stored as x,y,x,y,...
FOR DIGIT=0 TO LEN(NUMBER$)-1
 NUM=ASC("w$]m.k{%\o"[VAL(NUMBER$[DIGIT])]) 'get digit data. That data string doesn't have any non-ASCII characters, except \ which is 127 in SB.
 FOR I=0 TO 7-1 'draw each segment
  T=I*2 'position of point in array
  IF X AND 1 THEN GLINE PTS[T]+DIGIT*5,PTS[T+1],PTS[T]+DIGIT*5+!(I MOD 3),PTS[T+1]+!!(I MOD 3) 'draw segment. I MOD 3 determines whether it's horizontal or vertical.
  X=X>>1 'shift to next bit
 NEXT
NEXT

Answer 25

C++, 230 229 225 223 218 207 204 198 bytes

#import<iostream>
#define d for(auto
std::string v[3],t,g="|_| =2$0^262\'032;2$2?272";main(){std::cin>>t;d i:t)d j:{0,1,2})d k:{0,1,2})v[k]+=g[g[i*2-92+!k]>>j+k/2*3&1?j:3];d j:v)std::cout<<j<<'\n';}

Reads from stdin and output to stdout.

Explanation:

#import<iostream>                // string inside

std::string v[3], t, g="|_| "    // symbol on different horizontal position
      "=2$0^262\'032;2$2?272";   // space(0) or not(1) for each number and position
                                 // binary representation, last 6 bits is used
                                 // even positions are for row 1, 2; odds are for row 0

main() {
    std::cin>>t;                 // input
    for (auto i:t)               // for each character
        for (auto j:{0,1,2})     // for each horizontal position
            for (auto k:{0,1,2}) // for each vertical position
                v[k]+=g[         // use first four chars only
                    g[i*2-92     // i*2-96 is number*2, +4 to skip first four
                        +!k]     // row 0 uses another character
                    >>j+k/2*3    // (k==2?3:0)+j, the expected bit
                    &1           // extract the bit
                    ?j:3         // space or not space
                ];

    for (auto j:v) std::cout<<j<<'\n'; // output
}

Answer 26

Powershell, 114 bytes

param($a)6,3,0|%{$l=$_
-join($a|% t*y|%{('   0 _ 0 _|0|_ 0| |0  |0|_|'-split0)[(+('f-SR5Z^mvr'["$_"])-shr$l)%8]})}

Test script:

$f = {

param($a)6,3,0|%{$l=$_
-join($a|% t*y|%{('   0 _ 0 _|0|_ 0| |0  |0|_|'-split0)[(+('f-SR5Z^mvr'["$_"])-shr$l)%8]})}

}

&$f "1234567890"
&$f "81"

Output:

    _  _     _  _  _  _  _  _
  | _| _||_||_ |_   ||_||_|| |
  ||_  _|  | _||_|  ||_| _||_|
 _
|_|  |
|_|  |

Main idea:

Each standard digital clock style number contains 3 lines. Moreover, the first line contains only 2 options. A total of 6 options. Therefore, 7 bits are enough to encode each digit.

line str=@('   ', ' _ ', ' _|', '|_ ', '| |', '  |', '|_|')

#    line str    binary       dec    ASCII
-    --------    ---------    ---    -----
0 -> 1 
     4 
     6        -> 1 100 110 -> 102 -> 'f'

1 -> 0
     5
     5        -> 0 101 101 ->  45 -> '-'

...

8 -> 1
     6
     6        -> 1 110 110 -> 118 -> 'v'

9 -> 1
     6
     2        -> 1 110 010 -> 114 -> 'r'

So, the string f-SR5Z^mvr encodes all segments for all standard digital clock style numbers.

Note: The order of the line str was specially selected so that all codes were in the interval 32..126.

Answer 27

Python, 227 chars

a="   ";b=" _ ";c="|_|";d="| |";e="|  ";f="  |";g="|_ ";h=" _|"
z=[[b,d,c],[a,f,f],[b,h,g],[b,h,h],[a,c,f],[b,g,h],[b,g,c],[b,f,f],[b,c,c],[b,c,h]]
x=map(int,raw_input())
for i in range(3):
 for j in x:
  print z[j][i],
 print

Simple and straightforward.

Answer 28

Perl, 145 characters

$i=<>;for$s(6,3,0){for($i=~/./g){$v=(175,9,158,155,57,179,183,137,191,187)[$_]>>$s;$o.=($v&4?'|':$").($v&2?'_':$").($v&1?'|':$")}$o.="
"}print$o

Ungolfed:

# Read STDIN
$i = <>;
# Amount to bit shift later
for $s (6,3,0)
{
  # For each character C from STDIN
  for ($i =~ /./g)
  {
    # Get the Cth array index, bit shifted right by $s
    $v = (175, 9, 158, 155, 57, 179, 183, 137, 191, 187)[$_]>>$s;
    # Concatenate each character if the bitwise masked value says it should be there
    $o .= ($v & 4 ? '|' : $") .
          ($v & 2 ? '_' : $") .
          ($v & 1 ? '|' : $");
  }
  # Concatenate a newline
  $o .= "
";
}
# Print the result
print $o;

Answer 29

Python 3.4.3 - 1514 858 bytes

The temptation to solve this was too great not to sign up and answer =P

I'm a bit new to Python, so I formatted my program nice and neat (or at least I did). Improvements are greatly appreciated!

import sys;l1,l2,l3,l4,l5="";num=input()
for c in num:
    if c=="1":
        l1+=" oo  ";l2+="  o  ";l3+="  o  ";l4+="  o  ";l5+="oooo "
    if c=="2":
        l1+="oooo ";l2+="   o ";l3+="oooo ";l4+="o    ";l5+="oooo "
    if c=="3":
        l1+="oooo ";l2+="   o ";l3+=" ooo ";l4+="   o ";l5+="oooo "
    if c=="4":
        l1+="o  o ";l2+="o  o ";l3+="oooo ";l4+="   o ";l5+="   o "
    if c=="5":
        l1+="oooo ";l2+="o    ";l3+="oooo ";l4+="   o ";l5+="oooo "
    if c=="6":
        l1+="oooo ";l2+="o    ";l3+="oooo ";l4+="o  o ";l5+="oooo "
    if c=="7":
        l1+="oooo ";l2+="   o ";l3+="   o ";l4+="   o ";l5+="   o "
    if c=="8":
        l1+="oooo ";l2+="o  o ";l3+="oooo ";l4+="o  o ";l5+="oooo "
    if c=="9":
        l1+="oooo ";l2+="o  o ";l3+="oooo ";l4+="   o ";l5+="oooo "
    if c=="0":
        l1+="oooo ";l2+="o  o ";l3+="o  o ";l4+="o  o ";l5+="oooo "
print(l1+"\n"+l2+"\n"+l3+"\n"+l4+"\n"+l5)

Edit: Shortened variable names, used ; to shorten, only one space at end of output numbers, defined variables all at once.

New lines are 2 bytes (CRLF) and I used tabs instead of 4 spaces.