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A performance test on Array.indexOf vs Object.keys ( HashMap ) - amoldavsky/js-array-indexof-vs-hashmap ...
A utility which implements well known, firstIndexOf allIndexsOf lastIndexOf nthIndexOf functionality for an object array.
Javascript string indexof() method : the indexof() method is used to return the index value of specified string. it will give the index of string comes first from the start. we can also start ...