mapPutStrictlyOrFail - fail if value cannot be put strictly (i.e. not overwriting anything) [1035360]

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JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (7915L/44K).

static <A, B> AutoCloseable mapPutStrictlyOrFail(Map<A, B> map, A key, B value) {
  if (!(map != null && key != null && value != null)) null;
  B old = map.get(key);
  if (old == null) {
    map.put(key, value);
    ret -> map.remove(old);
  }
  if (eq(old, value)) null;
  fail("Can't overwrite key " + key + " (old value: " + old + ", new value: " + value);
}

Author comment

Began life as a copy of #1035359

download show line numbers debug dex old transpilations

Travelled to 2 computer(s): mowyntqkapby, mqqgnosmbjvj

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Snippet ID:	#1035360
Snippet name:	mapPutStrictlyOrFail - fail if value cannot be put strictly (i.e. not overwriting anything)
Eternal ID of this version:	#1035360/5
Text MD5:	6497a87a2c87fc6cff38f5f04bb6d200
Transpilation MD5:	72c7cf1558ee9e7e380378f1b4cd00e6
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2022-05-02 01:42:05
Source code size:	370 bytes / 10 lines
Pitched / IR pitched:	No / No
Views / Downloads:	50 / 75
Version history:	4 change(s)
Referenced in:	[show references]