FontoXML / fontoxpath / 722
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JosVerburg3274 of 3952 branches covered (82.84%)
Branch coverage included in aggregate %.
6538 of 7310 relevant lines covered (89.44%)
641913.83 hits per line
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import SequenceFactory from '../dataTypes/SequenceFactory'; |
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export default function createDoublyIterableSequence(sequence) { |
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const savedValues = [];
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const backingIterator = sequence.value;
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return function() {
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let i = 0;
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return SequenceFactory.create({
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next: () => {
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if (savedValues[i] !== undefined) {
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return savedValues[i++];
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} |
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const val = backingIterator.next();
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if (!val.ready) {
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return val;
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} |
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if (val.done) {
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return val;
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} |
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savedValues[i++] = val; |
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return val;
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} |
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}); |
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}; |
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} |