Shorthand method to count length of array – stackoverflow.com

Shorthand method to count length of array – stackoverflow.com

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I have an array like this var arr = [{a:1, ...},{a:1, ...},{c:2, ...},{a:3, ...},{a:1, ...}] how can I get the length of array where arr[x].a != 1 . I know this can be done using for loop and push ...

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