7
1
Given a list (array) of names, your challenge is to join the items using some glue and abbreviate the longest items first until the joined string fits a maximum length. And output that string. Since the glue is part of the final string, the length of the glue is included too
Abbreviation is done using the …
character
Examples
For example when |
is the glue and 20 is the maximum length
giraffe
would becomegiraffe
(length = 7)giraffe, Spiny lumpsucker
would becomegiraffe|Spiny lumps…
(length = 20)giraffe, Spiny lumpsucker, rhinoceros
would becomegiraf…|Spiny…|rhino…
(length = 20)giraffe, Spiny lumpsucker, rhinoceros, Hellbender
would become any of these:gira…|Spi…|rhi…|Hel…
gir…|Spin…|rhi…|Hel…
gir…|Spi…|rhin…|Hel…
gir…|Spi…|rhi…|Hell…
(all length = 20)
Rules
The list, glue and maximum length are input parameters of the program.
When abbreviation is needed, abbreviation must be done on any of the longest items first. When the longest items are equally long, it doesn't matter which you abbreviate.
The output length is smaller than the maximum length when no abbreviation was necessary. When abbreviation needs to occur, the length of the output is exactly equal to the maximum length.
The order of the (abbreviated) items must match the order of the items in the input
You can't assume that the abbreviation character …
and the glue won't occur as characters in the items in the list.
Update
I'm afraid that I overlooked the fact that the length of the glue concatenated with many items by itself may result into a string that is longer than the allowed maximum length. Without considering this, your program may run into an infinite loop. I prefer your program to throw an error in this case. I hope that's not too much of an inconvenience for the ones who already wrote an answer or that are busy writing one. To throw an error is NOT a requirement to win, but I would appreciate if you add a variant that does.
The winner
This is code-golf, so the shortest valid answer – measured in bytes – wins.
Do we choose the glue, or is one given to us in input? – Skidsdev – 2017-07-11T12:33:09.573
@Mayube the glue-string itself is input too – Christiaan Westerbeek – 2017-07-11T12:36:34.453
This is quite an interesting, 'planning to do it – V. Courtois – 2017-07-11T12:51:40.673
1@ChristiaanWesterbeek can we abbreviate more than necessary? I mean, can we output
gir…|Spi…|rhi…|Hel…
in your example 4? – V. Courtois – 2017-07-11T13:16:26.6501@V.Courtois No. "When abbreviation needs to occur, the length of the output is exactly equal to the maximum length.". In your comment the output length is 19. It has to be 20 when that's the maximum length – Christiaan Westerbeek – 2017-07-11T13:17:31.897
@ChristiaanWesterbeek Thanks for clarifying. – V. Courtois – 2017-07-11T13:18:31.000
Can we assume that the glue will never be in any of the array strings? – Erik the Outgolfer – 2017-07-11T13:34:05.470
Can we assume that
…
won't be in any string? – Erik the Outgolfer – 2017-07-11T13:40:27.620To be clear would
gir…|Spin…|rhi…|Hel…
,gir…|Spi…|rhin…|Hel…
, andgir…|Spi…|rhi…|Hell…
complete the list of valid outputs in your last example? – Jonathan Allan – 2017-07-11T13:51:42.207@EriktheOutgolfer You can't assume that. For any means practical your glue and abbreviation characters may occur as values in the list when that list originates from a database fed by some other program that isn't doing proper input validation. – Christiaan Westerbeek – 2017-07-11T14:00:09.233
@JonathanAllan Yes – Christiaan Westerbeek – 2017-07-11T14:00:39.400