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/** | ||
* @author benjcal [[email protected]] | ||
* @copyright Crown Copyright 2024 | ||
* @license Apache-2.0 | ||
*/ | ||
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import Operation from "../Operation.mjs"; | ||
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/** | ||
* ngram operation | ||
*/ | ||
class Ngram extends Operation { | ||
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/** | ||
* Ngram constructor | ||
*/ | ||
constructor() { | ||
super(); | ||
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this.name = "Ngram"; | ||
this.module = "Default"; | ||
this.description = "Extracts n-grams from the input text. N-grams are contiguous sequences of n characters from a given text sample."; | ||
this.infoURL = "https://wikipedia.org/wiki/N-gram"; | ||
this.inputType = "string"; | ||
this.outputType = "string"; | ||
this.args = [ | ||
{ | ||
name: "N-gram size", | ||
type: "number", | ||
value: 3 | ||
}, | ||
]; | ||
} | ||
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/** | ||
* @param {string} input | ||
* @param {Object[]} args | ||
* @returns {string} | ||
*/ | ||
run(input, args) { | ||
const n = args[0]; | ||
const ngrams = []; | ||
for (let i = 0; i <= input.length - n; i++) { | ||
ngrams.push(input.slice(i, i + n)); | ||
} | ||
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return ngrams.join("\n"); | ||
} | ||
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} | ||
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export default Ngram; |