@writetome51/array-get-indexes-intermediate

These are array-handling functions that return indexes of items in the array.

Returns all indexes of value in array:

getIndexesOf(value, array); // value cannot be object.

Self-explanatory:

getLastIndexOf(value, array); // value cannot be object.

This returns all indexes of array items that pass the testFunction:

getIndexesThatPass(testFunction, array)

testFunction = function(currentValue [, currentIndex [, theArray]]){ ... } // must return boolean.

Example:

let arr = ['a', 'boy', 'is', 'playing', 'in', 'the', 'street'];

let stringsLongerThanThree = getIndexesThatPass((value) => value.length > 3, arr);

stringsLongerThanThree is now [3, 6]