index multimethod

Methods

index(arr:Arr, pattern:Any=method, start:Int=0, dflt:Any=block) Source: stdlib.ngs:2770

Find index of the first value that matches the pattern. 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 compatibility in this case.

Parameters

arr	Items to look at
pattern	Test function or anything else acceptable by (=~), defaults to Bool.constructors
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 compatibility.

Example

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