dojo.indexOf

TODOC: inline API information

Returns the index of the item in the array, or -1 if false:

var arr = [ 1, 2, 3, 4, 5 ];
var idx = dojo.indexOf(arr, 1); // returns 0
var idx2 = dojo.indexOf(arr, 6) // returns -1

Because 0 is a valid index in an array, you need to check if the return is >= 0 to test truth,

Creating a has function would be trivial:

dojo.has = function(array, item){
   return dojo.indexOf(array, item) >= 0;
}

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• dojo.indexOf