FontoXML / fontoxpath / 833
travis-ci
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29 of 29 new or added lines in 1 file covered. (100.0%)
5405 of 6152 relevant lines covered (87.86%)
388402.32 hits per line
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import ISequence from '../dataTypes/ISequence'; |
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import sequenceFactory from '../dataTypes/sequenceFactory'; |
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export default function createDoublyIterableSequence(sequence: ISequence): () => ISequence { |
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const savedValues = [];
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const backingIterator = sequence.value;
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return () => {
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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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} |