I understand that Math.abs is used to convert negative numbers to absolute in JavaScript, but say I want to filter out negative numbers in an array for example, how do I do that? Is there a function for that?
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mntblnk
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"Ignore" as in filter them out of the array? – Yannick K Nov 07 '19 at 15:53
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3Can you define "ignore"? If you just want the control flow to skip over it, a simple `if(num < 0)` would suffice – Klaycon Nov 07 '19 at 15:53
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https://stackoverflow.com/questions/3571717/javascript-negative-number - please refer to following – Venkatesh Chitluri Nov 07 '19 at 15:55
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If you want to eliminate the values, @Antoni 's approach will do.
However, if you want to retain elements but bound the values (also known as clamping) I usually use Math.max(0, number); to set a lower numerical bound - if number is <0, it returns 0.
You can apply this to an array using map:
var array = [1, -2, 3];
array = array.map(number => Math.max(0, number));
//Sets array == [1, 0, 3]
Similarly for an upper bound you can use Math.min(upperLimit, number); and of course you can apply them both for upper and lower bounds:
var array = [1, -2, 3];
const lowerLimit = 0;
const upperLimit = 2;
array = array.map(number => Math.max(lowerLimit, Math.min(upperLimit, number)));
//Sets array == [1, 0, 2]
O Couch
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