AS3在数组中搜索一个值并返回它的位置索引

Posted 2021-02-26

If the item cannot be found then the return value is NaN. This function only returns the index of the first occurence found, so it's not very good if you have multiple occurrences of the same value in the array.

function findIndexInArray(value:Object, arr:Array):Number {
	for (var i:uint=0; i < arr.length; i++) {
		if (arr[i]==value) {
			return i;
		}
	}
	return NaN;
}
 
var myArray:Array = new Array("a","b","c","d","e","f","g");
trace(findIndexInArray("c", myArray));
 
// OUTPUT
// 2