1 | 'use strict';
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2 | const getDocumentationUrl = require('./utils/get-documentation-url');
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3 | const methodSelector = require('./utils/method-selector');
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4 | const needsSemicolon = require('./utils/needs-semicolon');
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5 |
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6 | const selector = [
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7 | methodSelector({
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8 | object: 'Array',
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9 | name: 'from',
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10 | min: 1,
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11 | max: 3
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12 | }),
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13 |
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14 | '[arguments.0.type!="ObjectExpression"]'
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15 | ].join('');
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16 |
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17 | const create = context => {
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18 | const sourceCode = context.getSourceCode();
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19 | const getSource = node => sourceCode.getText(node);
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20 |
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21 | return {
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22 | [selector](node) {
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23 | context.report({
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24 | node,
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25 | message: 'Prefer the spread operator over `Array.from()`.',
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26 | fix: fixer => {
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27 | const [arrayLikeArgument, mapFn, thisArgument] = node.arguments.map(node => getSource(node));
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28 | let replacement = `${
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29 | needsSemicolon(sourceCode.getTokenBefore(node), sourceCode) ? ';' : ''
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30 | }[...${arrayLikeArgument}]`;
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31 |
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32 | if (mapFn) {
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33 | const mapArguments = [mapFn, thisArgument].filter(Boolean);
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34 | replacement += `.map(${mapArguments.join(', ')})`;
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35 | }
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36 |
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37 | return fixer.replaceText(node, replacement);
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38 | }
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39 | });
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40 | }
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41 | };
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42 | };
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43 |
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44 | module.exports = {
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45 | create,
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46 | meta: {
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47 | type: 'suggestion',
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48 | docs: {
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49 | url: getDocumentationUrl(__filename)
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50 | },
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51 | fixable: 'code'
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52 | }
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53 | };
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