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static <A> A singletonOpt(Collection<A> l) { ret l(l) == 1 ? first(l) : null; } static <A> A singletonOpt(A[] l) { ret l(l) == 1 ? first(l) : null; }
Began life as a copy of #1005177
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| Snippet ID: | #1015727 |
| Snippet name: | singletonOpt - synonym of getSingletonOpt - return single elemtent of list if length == 1 or null otherwise |
| Eternal ID of this version: | #1015727/4 |
| Text MD5: | 900e5dccd8ef05d6aac3429dd0520f0d |
| Transpilation MD5: | 9b605d3822dd6d11326dd1f59eac65b4 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-04-02 18:05:41 |
| Source code size: | 160 bytes / 7 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 429 / 525 |
| Version history: | 3 change(s) |
| Referenced in: | #1006654 - Standard functions list 2 (LIVE, continuation of #761) #1025313 - first_warnIfMultiple - get first element of list; warn() when more than one element |