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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 $...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...了四种不同数据类型（字节、整数、十进制浮点数和文本字符串）的块，这些块是为了从 BLE 设备读取数据而创建的。 这些块包括读取单个值和在值更改时读取通知。 对于每个实例，都会返回特定的数据值。
写入值：创...
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
...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
width
设置layout viewport 的宽度，为一个正整数，或字符串"width-device"
initial-scale
设置页面的初始缩放值，为一个数字，可以带小数
minimum-scale
允许用户的最小缩放值，为一个数字，可以带小数
maximum-sca...
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 ...