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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.
21 gru 2019 · You can access an element at a specific index using the bracket notation accessor. var valueAtIndex1 = myValues[1]; On newer browsers/JavaScript engines (see browser compatibility here), you can also use the .at() method on arrays. var valueAtIndex1 = myValues.at(1);
10 gru 2023 · The findIndex() method of Array instances returns the index of the first element in an array that satisfies the provided testing function. If no elements satisfy the testing function, -1 is returned.
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 · This is a three-step process: Use the map () method to iterate over the array. Return only the values of the relevant property. Use the indexOf () method to get the index of the object in the array. index.js. const arr =[{id:'a'},{id:'b'},{id:'c'}];const index = arr.map(object=> object.id).indexOf('c');console.log(index);// 👉️ 2.
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.
