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Scans from right, while a test passes.

Package Exports

  • @extra-array/scan-while-right

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Scans from right, while a test passes. 🏃 📼 📦 🌔 📒

Alternatives: scanWhile, scanWhileRight, scanUntil, scanUntilRight.
Similar: search, scan, find.
This is part of package extra-array.

array.scanWhileRight(x, ft);
// x:  an array
// ft: test function (v, i, x)
// --> first index where test passes till end
const array = require('extra-array');

var x = [1, 1, 2, 2, 3, 3, 4, 4];
array.scanWhileRight(x, v => v % 3 !== 0);
// 6                       ^

array.scanWhileRight(x, v => v % 2 !== 0);
// 8                            ^

array.scanWhileRight(x, v => v % 6 !== 0);
// 0    ^

references