This method could be implemented as follows.Ī = function (predicate, thisValue) Īs you can see in Kangax’ ECMAScript 6 compatibility table, recent versions of Firefox and Chrome already support the *() methods.įurthermore, Paul Millr’s es6-shim has backported the methods to ECMAScript 5. If the callback never returns true, find() returns undefined (2). If predicate returns true, find() stops iterating and returns the current element (1). O método findIndex() retorna o índice no array do primeiro elemento que satisfizer a função de teste provida. The signature of the callback predicate() isįind() iterates over the array (while skipping holes) and calls predicate for each element. Two new Array methods (proposed by Rick Waldron) are in the latest ECMAScript 6 specification draft:Ī(predicate, thisValue?) See Also: The lastIndexOf () Method The search () Method The match () Method Syntax string.

The indexOf () method returns -1 if the value is not found. Newer version of this post: “ ECMAScript 6’s new array methods” Want to change your Syntax Highlighting theme, Fonts and more Visit your global Editor Settings. The indexOf () method returns the position of the first occurrence of a value in a string.

Findindex js