node-nlp
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Library for NLU (Natural Language Understanding) done in Node.js
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<a href="..\..\..\index.html">All files</a> / <a href="index.html">lib/nlp/tokenizers</a> aggressive-tokenizer-en.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/*
* Copyright (c) AXA Shared Services Spain S.A.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
const AggressiveTokenizer = require('./aggressive-tokenizer');
class AggressiveTokenizerEn extends AggressiveTokenizer {
replaceContractions(arr) {
const contractionsBase = {
cannot: ['can', 'not'],
gonna: ['going', 'to'],
wanna: ['want', 'to'],
};
const contractions = {
s: 'is',
re: 'are',
m: 'am',
ve: 'have',
d: 'had',
t: 'not',
};
const result = [];
arr.forEach(item => {
const lowitem = item.toLowerCase();
<span class="missing-if-branch" title="if path not taken" >I</span>if (contractionsBase[lowitem]) {
<span class="cstat-no" title="statement not covered" > result.push(...contractionsBase[lowitem]);</span>
} else {
const tokens = lowitem.split(/[^a-zA-Zá-úÁ-ÚñÑüÜ]+/);
if (tokens.length === 2) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (tokens[1] === 't') {
<span class="cstat-no" title="statement not covered" > if (tokens[0][tokens[0].length - 1] === 'n') {</span>
<span class="cstat-no" title="statement not covered" > result.push(tokens[0].substring(0, tokens[0].length - 1));</span>
<span class="cstat-no" title="statement not covered" > result.push('not');</span>
} else {
<span class="cstat-no" title="statement not covered" > result.push(item);</span>
}
} else {
result.push(tokens[0]);
result.push(contractions[tokens[1]] || tokens[1]);
}
} else {
result.push(item);
}
}
});
return result;
}
tokenize(text) {
const arr = this.trim(text.split(/[^a-zA-Zá-úÁ-ÚñÑüÜ']+/));
return this.replaceContractions(arr);
}
}
module.exports = AggressiveTokenizerEn;
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