msOneOf - get random entry from MultiSet (honoring element counts of course) [1003281]

13
LINES

< > BotCompany Repo | #1003281 // msOneOf - get random entry from MultiSet (honoring element counts of course)

JavaX fragment (include)

static <A> A msOneOf(MultiSet<A> ms) {
  int total = ms.size();
  if (total == 0) ret null;
  int n = random(total);

  for (Map.Entry<A, Integer> entry : ms.map.entrySet()) {
    n -= entry.getValue();
    if (n < 0)
      return entry.getKey();
  }
  
  ret null;
}

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Snippet ID:	#1003281
Snippet name:	msOneOf - get random entry from MultiSet (honoring element counts of course)
Eternal ID of this version:	#1003281/1
Text MD5:	cf23db68f94a04a64cfa0109df1346b9
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2016-06-15 00:07:29
Source code size:	279 bytes / 13 lines
Pitched / IR pitched:	No / No
Views / Downloads:	516 / 613
Referenced in:	[show references]

1	static <A> A msOneOf(MultiSet<A> ms) {
2	int total = ms.size();
3	if (total == 0) ret null;
4	int n = random(total);
5
6	for (Map.Entry<A, Integer> entry : ms.map.entrySet()) {
7	n -= entry.getValue();
8	if (n < 0)
9	return entry.getKey();
10	}
11
12	ret null;
13	}