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doc: fix errors in sample code comments #19963

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doc: fix errors in sample code comments #19963

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34 changes: 14 additions & 20 deletions doc/api/buffer.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1524,10 +1524,7 @@ console.log(buf.readDoubleBE(0));
console.log(buf.readDoubleLE(0));
// Prints: 5.447603722011605e-270
console.log(buf.readDoubleLE(1));
// Throws an exception: RangeError: Index out of range
console.log(buf.readDoubleLE(1, true));
// Warning: reads passed end of buffer!
// This will result in a segmentation fault! Don't do this!
// Throws ERR_OUT_OF_RANGE
```

### buf.readFloatBE(offset)
Expand Down Expand Up @@ -1556,10 +1553,7 @@ console.log(buf.readFloatBE(0));
console.log(buf.readFloatLE(0));
// Prints: 1.539989614439558e-36
console.log(buf.readFloatLE(1));
// Throws an exception: RangeError: Index out of range
console.log(buf.readFloatLE(1, true));
// Warning: reads passed end of buffer!
// This will result in a segmentation fault! Don't do this!
// Throws ERR_OUT_OF_RANGE
```

### buf.readInt8(offset)
Expand Down Expand Up @@ -1587,7 +1581,7 @@ console.log(buf.readInt8(0));
console.log(buf.readInt8(1));
// Prints: 5
console.log(buf.readInt8(2));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.readInt16BE(offset)
Expand Down Expand Up @@ -1618,7 +1612,7 @@ console.log(buf.readInt16BE(0));
console.log(buf.readInt16LE(0));
// Prints: 1280
console.log(buf.readInt16LE(1));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.readInt32BE(offset)
Expand Down Expand Up @@ -1649,7 +1643,7 @@ console.log(buf.readInt32BE(0));
console.log(buf.readInt32LE(0));
// Prints: 83886080
console.log(buf.readInt32LE(1));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.readIntBE(offset, byteLength)
Expand Down Expand Up @@ -1679,9 +1673,9 @@ console.log(buf.readIntLE(0, 6).toString(16));
console.log(buf.readIntBE(0, 6).toString(16));
// Prints: 1234567890ab
console.log(buf.readIntBE(1, 6).toString(16));
// Throws ERR_INDEX_OUT_OF_RANGE:
// Throws ERR_INDEX_OUT_OF_RANGE
console.log(buf.readIntBE(1, 0).toString(16));
// Throws ERR_OUT_OF_RANGE:
// Throws ERR_OUT_OF_RANGE
```

### buf.readUInt8(offset)
Expand All @@ -1707,7 +1701,7 @@ console.log(buf.readUInt8(0));
console.log(buf.readUInt8(1));
// Prints: 254
console.log(buf.readUInt8(2));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.readUInt16BE(offset)
Expand Down Expand Up @@ -1740,7 +1734,7 @@ console.log(buf.readUInt16BE(1).toString(16));
console.log(buf.readUInt16LE(1).toString(16));
// Prints: 5634
console.log(buf.readUInt16LE(2).toString(16));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.readUInt32BE(offset)
Expand Down Expand Up @@ -1769,7 +1763,7 @@ console.log(buf.readUInt32BE(0).toString(16));
console.log(buf.readUInt32LE(0).toString(16));
// Prints: 78563412
console.log(buf.readUInt32LE(1).toString(16));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.readUIntBE(offset, byteLength)
Expand Down Expand Up @@ -1799,7 +1793,7 @@ console.log(buf.readUIntBE(0, 6).toString(16));
console.log(buf.readUIntLE(0, 6).toString(16));
// Prints: ab9078563412
console.log(buf.readUIntBE(1, 6).toString(16));
// Throws an exception: RangeError: Index out of range
// Throws ERR_OUT_OF_RANGE
```

### buf.slice([start[, end]])
Expand Down Expand Up @@ -1895,7 +1889,7 @@ console.log(buf1);
const buf2 = Buffer.from([0x1, 0x2, 0x3]);

buf2.swap16();
// Throws an exception: RangeError: Buffer size must be a multiple of 16-bits
// Throws ERR_INVALID_BUFFER_SIZE
```

### buf.swap32()
Expand All @@ -1922,7 +1916,7 @@ console.log(buf1);
const buf2 = Buffer.from([0x1, 0x2, 0x3]);

buf2.swap32();
// Throws an exception: RangeError: Buffer size must be a multiple of 32-bits
// Throws ERR_INVALID_BUFFER_SIZE
```

### buf.swap64()
Expand All @@ -1949,7 +1943,7 @@ console.log(buf1);
const buf2 = Buffer.from([0x1, 0x2, 0x3]);

buf2.swap64();
// Throws an exception: RangeError: Buffer size must be a multiple of 64-bits
// Throws ERR_INVALID_BUFFER_SIZE
```

Note that JavaScript cannot encode 64-bit integers. This method is intended
Expand Down