array.every(function(currentValue,index,arr),) var arr = [1,2,3,4,5,6,7] var isHas = arr.every(item => item > 5); console.log(isHas ); // false var isHas2 = arr.every(item => item < 8); console.log(isHas2 ); // true 1. 2. 3. 4. 5. JavaScript 循环 for - ...
-2,6.8];// Declare a function called that// takes an element as a parameter// and returns true if the element// is greater than 19constisLargeNumber =(element) =>element >19;// Call thefindLastIndexmethod on// the arr1 array and pass in the// isLargeNumber function as a parameter...
JavaScript built-in: Array: findLastIndex Global usage 94.53% + 0% = 94.53% IE ❌ 6 - 10: Not supported ❌ 11: Not supported Edge ❌ 12 - 96: Not supported ✅ 97 - 134: Supported ✅ 135: Supported Firefox ❌ 2 - 103: Not supported ✅ 104 - 136: Supported ✅ 137...
JavaScript built-in: Array: findLast Global usage 94.53% + 0% = 94.53% IE ❌ 6 - 10: Not supported ❌ 11: Not supported Edge ❌ 12 - 96: Not supported ✅ 97 - 134: Supported ✅ 135: Supported Firefox ❌ 2 - 103: Not supported ✅ 104 - 136: Supported ✅ 137: ...
Learn how to use the JavaScript Array findLastIndex method to find the last index of an element in an array that satisfies a testing function.
Array Find Methods: MethodFinds indexOf()The index of the first element with a specified value lastIndexOf()The index of the last element with a specified value find()The value of the first element that passes a test findIndex()The index of the first element that passes a test ...
方法2、lastIndexOf方法 从右至左查找,找到返回索引,找不到返回-1 let index2 = arr.lastIndexOf(6); console.log(index2);//5 1. 2. 方法3、includes方法 从左往右查找,找到返回true,找不到返回false let resulr = arr.includes(6); console.log(resulr);//true ...
The findLastIndex() method executes a function for each array element.The findLastIndex() method returns the index (position) of the last element that passes a test.The findLastIndex() method returns -1 if no match is found. The findLastIndex() method does not execute the function for...
findLast() iterates through the array from the end, searching for the first element that satisfies the condition (being even).Since 8 is the last even number, it is returned as the result.In a nutshell, findLast() can be a valuable tool for efficiently searching arrays from the end and...
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