Looking at the console log it seems like the length of repeatLater is one plus the number of objects which is odd, the addition being proto. I suspect that the problem might be because there are objects/entries in the repeatLater array that do not have the ‘minTrial’ key. Occasionally I get thrown this error : TypeError: Cannot read property ‘minTrial’ of undefined repeatIdx = repeatLater.findIndex( x => x.minTrial <= trials.thisN ) After retrieving the trial, I delete that object from the array.
I have created a multidimensional array in JavaScript and I want to find the exact index of specific value. repeatLater.push() Īt the beginning of the routine, I am using findIndex to search through repeatLater to find the index of the first instance where the my specifications are met, in this case I want the trial number to be at least the minTrial. To find Index of Multidimensional Array in Javascript. I created an array of objects (named repeatLater) where each object consists of specifications of a that I’d want to repeat after a number of trials. Array,findIndex returns us the index of first element that fulfills the test condition WHAT IS array.findIndex() in Javascript javascript programming co. 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.Hi all, This is more of a javascript question. If the callback never returns true, find() returns undefined (2). If predicate returns true, find() stops iterating and returns the current element (1). 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?) Newer version of this post: “ ECMAScript 6’s new array methods”
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