Beth Griggs
19 lines
394 B
JavaScript
19 lines
394 B
JavaScript
const fs = require("fs");
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const { Transform } = require("stream");
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const rs = fs.createReadStream("./file.txt");
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const newFile = fs.createWriteStream("./newFile.txt");
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class Uppercase extends Transform {
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constructor() {
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super();
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}
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_transform(chunk, encoding, callback) {
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this.push(chunk.toString().toUpperCase());
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callback();
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}
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}
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rs.pipe(new Uppercase()).pipe(newFile);
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