How to find the index of an element in an array in JavaScript
Łukasz Holeczek
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Finding the index position of elements in arrays is essential for data manipulation, conditional logic, and implementing features like highlighting, sorting, or removing specific items in JavaScript applications.
With over 25 years of experience in software development and as the creator of CoreUI, I’ve implemented index searching extensively in components like sortable lists, selection systems, and data tables where precise element positioning is crucial.
From my extensive expertise, the most straightforward and efficient solution is using the indexOf() method for primitive values, which returns the first occurrence’s index.
This approach is fast, widely supported, and specifically designed for finding element positions.
How to remove a specific item from an array in JavaScript
Łukasz Holeczek
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Removing specific items from JavaScript arrays is crucial when building interactive applications that need to delete selected items, remove tags, or filter out unwanted data based on user actions.
With over 25 years of experience in software development and as the creator of CoreUI, I’ve implemented this functionality extensively in components like multi-select dropdowns, tag inputs, and data tables where users need to remove specific entries.
From my extensive expertise, the most reliable and efficient solution is combining indexOf() to find the item’s position with splice() to remove it.
This approach handles both primitive values and object references while maintaining array integrity.