Javascript Map Function Return Object
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Javascript Map Function Return Object
Note that you also need to surround the user id key with brackets in order to evaluate the variable. Map () does not execute the function for empty elements. Here in this example, it creates a new array of item names.
What you actually want is a filter. But it produces an array (while i need an object) of {key : Console.log () returns undefined, so your current solution gives an array of all undefined s.
Delete() removes a map element specified by the key:
Set() sets the value for a key in a map: Definition and usage map () creates a new array from calling a function for every array element. Map () calls a function once for each element in an array. .map () can be used to iterate through objects in an array and, in a similar fashion to traditional arrays, modify the content of each individual object and return a new array.
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