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8 wrz 2011 · It is possible to use a ES6 function Array.prototype.findIndex. MDN says: The findIndex () method returns the index of the first element in the array that satisfies the provided testing function. Otherwise -1 is returned.
17 wrz 2012 · If you need to know the array index (not just the matching object) you can mix _.findWhere() with _.indexOf() like so: var index = _.indexOf(array, _.findWhere(array, {name: 'string 1'})); –
18 wrz 2024 · Getting the index of an array based on a property value involves finding the position of an object within the array where a specific property matches a given value. The below approaches can be used to accomplish the task.
The findIndex() method executes a function for each array element. The findIndex() method returns the index (position) of the first element that passes a test. The findIndex() method returns -1 if no match is found.
1 mar 2024 · The indexOf method returns the index of the first object that meets the condition. If the indexOf () method doesn't find an element with the given value, it returns -1, just like the findIndex () method. I've also written a detailed guide on how to filter an array of objects.
8 lut 2024 · The indexOf() method of Array instances returns the first index at which a given element can be found in the array, or -1 if it is not present.
8 lut 2024 · The with () method changes the value of a given index in the array, returning a new array with the element at the given index replaced with the given value. The original array is not modified. This allows you to chain array methods while doing manipulations.