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Hover & click on the images for description
Description
 Description:
 Returns a random element from the given array according to assigned weights. Engine solution to BIS_fnc_selectRandomWeighted. A few notes:
 Negative weights are not supported
 If an item's weight is 0, the item is ignored
 The weights don't have to total to 1
 If numbers of items and weights do not match, the shortest array is used
 A single array Syntax is slightly faster than Alt Syntax
 Groups:
 Arrays
Syntax
 Syntax:
 selectRandomWeighted valuesAndWeights
 Parameters:
 valuesAndWeights: Array  array in format [value1, weight1, value2, weight2, ...], where:
 value: Anything  weighted value
 weight: Number  values relative weight
 Return Value:
 Anything  random weighted value or Nothing if array is empty or all weights are 0
Alternative Syntax
 Syntax:
 values selectRandomWeighted weights
 Parameters:
 values: Array of Anything
 weights: Array of Numbers
 Return Value:
 Anything  random weighted value or Nothing if any of arrays is empty or all weights are 0
Examples
 Example 1:
 Example 2:
Additional Information
 See also:
 random select selectRandom selectMin selectMax
Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here!
Add Note
 Killzone_Kid
 Posted on Jun 26, 2017  19:17 (UTC)

A 100000 runs of the following code:
Gave this result:
0  0
0.01  144
0.09  1409
0.109  1633
0.55  8673
0.65  10127
1.01  15668
1.15  18059
1.24  19518
1.59  24769