# selectRandomWeighted

From Bohemia Interactive Community

Click on the images for descriptions

### Introduced in

- Game:
- Arma 3
- Version:
- 1.76

### 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 then Alt Syntax

### Syntax

- Syntax:
**selectRandomWeighted**valuesAndWeights- Parameters:
- valuesAndWeights: Array - array in format [value1, weight1, value2, weight2...], where:
- 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 - array of Anything
- weights: Array - 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:
`_randomWeightedElement = selectRandomWeighted [1,0.1,2,0.2,3,1.3,4,2.4,5,7.5];`

- Example 2:
`_randomWeightedElement = [1,2,3,4,5] selectRandomWeighted [0.1,0.2,1.3,2.4,7.5];`

### Additional Information

- Multiplayer:
- -
- See also:
- randomselectselectRandomselectMinselectMax

### Notes

*Only post proven facts here. Report bugs on the feedback tracker. Use the talk page or the forums for discussions.*

Add New Note | How To

- Posted on June 26, 2017 - 19:17 (UTC)
- Killzone Kid
- A 100000 runs of the following code:
`_values = [0,1,2,3,4,5,6,7,8,9]; _weights = [0.109,0.65,0.01,1.01,1.24,0,1.59,0.09,1.15,0.55]; _result = _values selectRandomWeighted _weights;`

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