![]() If search argument is a non-global regular expression, then replaceAll() throws a TypeError exception.If search argument is a string, replaceAll() replaces all occurrences of search with replaceWith, while replace() replaces only the first occurence.The string methods replaceAll(search, replaceWith) and replace(search, replaceWith) work the same way, except 2 things: ![]() 3.1 The difference between replaceAll() and replace() Note that browser support for this method is currently limited, and you might require a polyfill. String.replaceAll(search, replaceWith) is the best way to replace all string occurrences in a string 'duck duck go'.replaceAll(' ', '-') replaces all occurrences of ' ' string with '-'. filter ( item => ) // find all values item < 25 ) Ĭonsole. Here is an example: const values = // find all values > 25 const greaterThan25 = values. ![]() In the callback body, you can test if the current item matches what you're looking for, and return a boolean ( true or false) accordingly. The first is the current element in the iteration, the second is the index of the current item in the array, and the third is the array itself. The callback function passed as an argument takes in up to three optional parameters. The Array.filter() method creates a new array by iterating over all elements of an array and returns those that pass a certain condition as an array. Today, you'll learn a useful trick to find all matching items in an array by using the Array.filter() method. Last week, we looked at JavaScript arrays in detail and how to use them to store multiple values in a single variable.
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