index multimethod

Methods

index(arr:Arr, predicate:Any, start:Int=0, dflt:Any=[]) Source: stdlib.ngs:1781

Find index of first value that satisfies the predicate. TODO: Make it work on anything with each() method. In future, will throw exception if element is not found and default is not provided. Now returns null for backwards compatibilty in this case.

Parameters

arr	Items to look at
predicate	Test function
start	Index to start search at
dflt	default value to return when element is not found

Returns

Int or dflt. Temporary also null, for backwards compatibilty.

Example

[1,2,11,3,4].index(X>10)  # 2