Find Index Of Element In List Javascript
Find Index Of Element In List Javascript - Description The indexOf method returns the first index position of a specified value The indexOf method returns 1 if the value is not found The indexOf method starts at a specified index and searches from left to right By default the search starts at the first element and ends at the last 12 Answers Sorted by 369 You can use indexOf var imageList 100 200 300 400 500 var index imageList indexOf 200 1 You will get 1 if it cannot find a value in the array The findIndex method returns the index of the first array element that satisfies the provided test function or else returns 1 Example function that returns odd number function isOdd element return element 2 0 defining an array of integers let numbers 2 8 1 3 4
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Find Index Of Element In List Javascript
How To Check The Position Of An Element In A List Python
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Array Index Out Of Range
Array index out of range
To find the position of an element in an array you use the indexOf method This method returns the index of the first occurrence the element that you want to find or 1 if the element is not found The following illustrates the syntax of the indexOf method Array indexOf searchElement fromIndex Code language JavaScript javascript
The first index of searchElement in the array 1 if not found Description The indexOf method compares searchElement to elements of the array using strict equality the same algorithm used by the operator NaN values are never compared as equal so indexOf always returns 1 when searchElement is NaN
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Const index list indexOf 5 4 console log index 4 Search element when startFrom index is greater than Array s length const index list indexOf 5 9 console log index 1 String We can only search for the position of characters with String s indexOf method It works same as the Array s indexOf method
103 I need to find an index of element inside its container by object reference Strangely I cannot find an easy way No jQuery please only DOM UL LI LI LI my index is 2 LI Yes I could assign IDs to each element and loop through all nodes to match the ID but it seems a bad solution Isn t there something nicer