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Node.js - append data to Buffer
7 points
In this short article, we would like to show how to append data to buffer in Node.js.
Quick solution:
The best way is to collect chunks in array and concat them togather.
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const chunks = [];2
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chunks.push(Buffer.from([0x00, 0x01])); // chunk 14
chunks.push(Buffer.from([0x02, 0x03])); // chunk 25
chunks.push(Buffer.from([0x04, 0x05])); // chunk 36
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// put more chunks here ...8
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const buffer = Buffer.concat(chunks);
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const GrowingBuffer = () => {2
const chunks = [];3
return {4
append: (chunk) => {5
chunks.push(chunk);6
},7
concat: () => {8
return Buffer.concat(chunks);9
}10
};11
};12
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// Usage example:15
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const builder = GrowingBuffer();17
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builder.append(Buffer.from([0x00, 0x01])); // buffer chunk 119
builder.append(Buffer.from([0x02, 0x03])); // buffer chunk 220
builder.append(Buffer.from([0x04, 0x05])); // buffer chunk 321
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// put more chunks here ...23
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const buffer = builder.concat(); // [0, 1, 2, 3, 4, 5]
