buf.indexOf(value[, byteOffset][, encoding])
Operates similar to Array#indexOf() in that it returns either the starting index position of value in Buffer or -1 if the Buffer does not contain value. The value can be a String, Buffer or Number. Strings are by default interpreted as UTF8. Buffers will use the entire Buffer (to compare a partial Buffer use buf.slice()). Numbers can range from 0 to 255.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | const buf = Buffer.from('this is a buffer');buf.indexOf('this'); // returns 0buf.indexOf('is'); // returns 2buf.indexOf(Buffer.from('a buffer')); // returns 8buf.indexOf(97); // ascii for 'a' // returns 8buf.indexOf(Buffer.from('a buffer example')); // returns -1buf.indexOf(Buffer.from('a buffer example').slice(0,8)); // returns 8const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2');utf16Buffer.indexOf('\u03a3', 0, 'ucs2'); // returns 4utf16Buffer.indexOf('\u03a3', -4, 'ucs2'); // returns 6 |
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