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40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
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// Loaded from https://deno.land/x/ramda@v0.27.2/source/internal/_xaperture.js
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import _concat from './_concat.js';
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import _curry2 from './_curry2.js';
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import _xfBase from './_xfBase.js';
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function XAperture(n, xf) {
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this.xf = xf;
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this.pos = 0;
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this.full = false;
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this.acc = new Array(n);
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}
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XAperture.prototype['@@transducer/init'] = _xfBase.init;
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XAperture.prototype['@@transducer/result'] = function(result) {
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this.acc = null;
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return this.xf['@@transducer/result'](result);
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};
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XAperture.prototype['@@transducer/step'] = function(result, input) {
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this.store(input);
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return this.full ? this.xf['@@transducer/step'](result, this.getCopy()) : result;
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};
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XAperture.prototype.store = function(input) {
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this.acc[this.pos] = input;
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this.pos += 1;
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if (this.pos === this.acc.length) {
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this.pos = 0;
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this.full = true;
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}
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};
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XAperture.prototype.getCopy = function() {
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return _concat(Array.prototype.slice.call(this.acc, this.pos),
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Array.prototype.slice.call(this.acc, 0, this.pos)
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);
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};
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var _xaperture = _curry2(function _xaperture(n, xf) { return new XAperture(n, xf); });
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export default _xaperture;
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