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Regular expression for floating point numbers
...ation of this pattern
If you want to include non-decimal numbers, such as hex and octal, see my answer to How do I identify if a string is a number?.
If you want to validate that an input is a number (rather than finding a number within the input), then you should surround the pattern with ^ and $...
CSS triangle custom border color
Attempting to use a custom hex color for my css triangle (border). However since it uses border properties I am unsure how to go about doing this. I would like to steer clear of javascript and css3 simply because of compatibility. I am trying to have the triangle have a white background with a 1px b...
How do BitTorrent magnet links work?
...he included tracker.
The download may begin.
1 The infohash is typically hex-encoded, but some old clients used base 32 instead. v1 (urn:btih:) uses the SHA-1 digest directly, while v2 (urn:bimh:) adds a multihash prefix to identify the hash algorithm and digest length.
2 There are two primary DHT...
Create unique constraint with null columns
...lso because it's not a valid UUID. A UUID generator is not free to use any hex digit in any position, for example one position is reserved for the version number of the UUID.
– Toby 1 Kenobi
Sep 3 '19 at 5:35
...
What is the smallest possible valid PDF?
...line, but Acrobat accepts Windows, Mac, or Unix conventions, so by using a hex editor, I replaced the \r\n with \r and removed the last newline altogether, which leaves me with 67 bytes
25 50 44 46 2D 31 2E 0D 74 72 61 69 6C 65 72 3C
3C 2F 52 6F 6F 74 3C 3C 2F 50 61 67 65 73 3C 3C
2F 4B 69 64 73 ...
How do I decode a string with escaped unicode?
... It looks like the regex is looking for a \u prefix and than a 4 character hex number (letters or numbers). How does the function in the replace method work?
– styfle
Oct 26 '11 at 1:42
...
Why does changing 0.1f to 0 slow down performance by 10x?
...15) | (1<<6) );
// Does both FTZ and DAZ bits. You can also use just hex value 0x8040 to do both.
// You might also want to use the underflow mask (1<<11)
Appears to work in both GCC and Visual Studio:
// Requires #include <xmmintrin.h>
// Requires #include <pmmintrin.h>
_M...
How can I extract embedded fonts from a PDF as valid font files?
...m
<<
/Length1 778552
/Length 1581435
/Filter /ASCIIHexDecode
>>
This pdf-parser.py output tells us that this object contains a stream (which it will not directly display) that has a length of 1.581.435 Bytes and is encoded ( == "compressed") with ASCIIHexEncode and ...
Generating an MD5 checksum of a file
...f.read(4096), b""):
hash_md5.update(chunk)
return hash_md5.hexdigest()
Note: hash_md5.hexdigest() will return the hex string representation for the digest, if you just need the packed bytes use return hash_md5.digest(), so you don't have to convert back.
...
How can I unit test Arduino code?
...unsigned int i = 0; i < size; i++ ){
cout << setw(2) << hex << (unsigned int)buf[i] << " ";
}
cout << endl;
cout.flags(oldFlags);
cout.precision(oldPrec);
cout.fill(oldFill);
return size;
}
FakeSerial Serial;
and finally, the actual test program:...