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Initialize array with values
JavaScript, Array · Oct 20, 2020
Initializes and fills an array with the specified values.
- Use
Array.from()to create an array of the desired length,Array.prototype.fill()to fill it with the desired values. - Omit the last argument,
val, to use a default value of0.
const initializeArrayWithValues = (n, val = 0) =>
Array.from({ length: n }).fill(val);initializeArrayWithValues(5, 2); // [2, 2, 2, 2, 2]More like this
Pull values from array based on function
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Mutates the original array to filter out the values specified, based on a given iterator function.
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Converts an array of objects to a comma-separated values (CSV) string that contains only the
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Filters an array of objects based on a condition while also filtering out unspecified keys.