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47 lines
1.4 KiB
TypeScript
47 lines
1.4 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/dropRepeatsWith.js
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import _curry2 from './internal/_curry2.js';
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import _dispatchable from './internal/_dispatchable.js';
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import _xdropRepeatsWith from './internal/_xdropRepeatsWith.js';
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import last from './last.js';
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/**
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* Returns a new list without any consecutively repeating elements. Equality is
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* determined by applying the supplied predicate to each pair of consecutive elements. The
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* first element in a series of equal elements will be preserved.
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*
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* Acts as a transducer if a transformer is given in list position.
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*
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* @func
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* @memberOf R
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* @since v0.14.0
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* @category List
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* @sig ((a, a) -> Boolean) -> [a] -> [a]
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* @param {Function} pred A predicate used to test whether two items are equal.
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* @param {Array} list The array to consider.
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* @return {Array} `list` without repeating elements.
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* @see R.transduce
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* @example
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*
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* const l = [1, -1, 1, 3, 4, -4, -4, -5, 5, 3, 3];
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* R.dropRepeatsWith(R.eqBy(Math.abs), l); //=> [1, 3, 4, -5, 3]
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*/
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var dropRepeatsWith = _curry2(_dispatchable([], _xdropRepeatsWith, function dropRepeatsWith(pred, list) {
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var result = [];
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var idx = 1;
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var len = list.length;
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if (len !== 0) {
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result[0] = list[0];
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while (idx < len) {
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if (!pred(last(result), list[idx])) {
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result[result.length] = list[idx];
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}
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idx += 1;
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}
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}
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return result;
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}));
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export default dropRepeatsWith;
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