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41 lines
1.2 KiB
TypeScript
41 lines
1.2 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/takeLastWhile.js
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import _curry2 from './internal/_curry2.js';
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import slice from './slice.js';
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/**
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* Returns a new list containing the last `n` elements of a given list, passing
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* each value to the supplied predicate function, and terminating when the
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* predicate function returns `false`. Excludes the element that caused the
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* predicate function to fail. The predicate function is passed one argument:
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* *(value)*.
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*
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* @func
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* @memberOf R
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* @since v0.16.0
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* @category List
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* @sig (a -> Boolean) -> [a] -> [a]
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* @sig (a -> Boolean) -> String -> String
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* @param {Function} fn The function called per iteration.
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* @param {Array} xs The collection to iterate over.
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* @return {Array} A new array.
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* @see R.dropLastWhile, R.addIndex
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* @example
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*
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* const isNotOne = x => x !== 1;
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*
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* R.takeLastWhile(isNotOne, [1, 2, 3, 4]); //=> [2, 3, 4]
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*
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* R.takeLastWhile(x => x !== 'R' , 'Ramda'); //=> 'amda'
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*/
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var takeLastWhile = _curry2(function takeLastWhile(fn, xs) {
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var idx = xs.length - 1;
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while (idx >= 0 && fn(xs[idx])) {
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idx -= 1;
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}
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return slice(idx + 1, Infinity, xs);
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});
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export default takeLastWhile;
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