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What does value & 0xff do in Java?
... What does the x mean in that notation? x isn't a number or a hex number?
– Callat
Dec 5 '16 at 18:56
3
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What's the bad magic number error?
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Take the pyc file to a windows machine. Use any Hex editor to open this pyc file. I used freeware 'HexEdit'. Now read hex value of first two bytes. In my case, these were 03 f3.
Open calc and convert its display mode to Programmer (Scientific in XP) to see Hex and Decimal...
How to hash a string into 8 digits?
...# Use hashlib
>>> import hashlib
>>> int(hashlib.sha1(s).hexdigest(), 16) % (10 ** 8)
58097614L
>>> # Use hash()
>>> abs(hash(s)) % (10 ** 8)
82148974
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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
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Do note that md5 returns hexadecimal values, meaning the character set is limited to [0-9] and [a-f].
– Thijs Riezebeek
May 15 '15 at 16:59
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Scatterplot with too many points
...is is (and probably more appropriate for the number of points you have) is hexagonal binning:
ggplot(df,aes(x=x,y=y)) + stat_binhex()
And there is also regular old rectangular binning (image omitted), which is more like your traditional heatmap:
ggplot(df,aes(x=x,y=y)) + geom_bin2d()
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程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...合，产生不可理解的密文的步骤，密钥是用来对数据进行编码和解码的一种算法。
举个例子：
假设我们要对LOVE加密，我们可以先定义字母的顺序ABCDEFGHIJKLMNOPQRSTUVWXYZ，然后我们让每个字母向后移动两位，那么LOVE就变为了NQXG
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Adding HTML entities using CSS content
...ACE character in Unicode (or UCS-2; see the HTML 4.01 Specification). The hexadecimal representation of that code point is U+00A0 (160 = 10 × 161 + 0 × 160). You will find that in the Unicode Code Charts and Character Database.
In CSS you need to use a Unicode escape sequence for such characters...
Xcode 4.2 debug doesn't symbolicate stack call
...y to go.
When app crashes, and you get your raw first throw call stack (in hex numbers), type into Xcode console info line *hex (don't forget star and 0x hex specifier), for example:
(gdb) info line *0x2658
Line 15 of "path/to/file/main.m" starts at address 0x25f2 <main+50>
and ends at 0x267e...
How to use unicode characters in Windows command line?
...yboard layout. For best results, I recommend my layouts.
For input: allow HEX input of Unicode.
One more gotcha with “Pasting” into a console application (very technical):
HEX input delivers a character on KeyUp of Alt; all the other ways to deliver a character happen on KeyDown; so many app...
What is the 
 character?
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That would be an HTML Encoded Line Feed character (using the hexadecimal value).
The decimal value would be &#10;
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