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Get Image size WITHOUT loading image into memory
...ER:
name, description, handler = MARKER[i]
# print hex(i), name, description
if handler is not None:
handler(self, i)
if i == 0xFFDA: # start of scan
rawmode = self.mode
if self.mode == "CMYK":
...
Regex exactly n OR m times
...nsider this:
#[a-f0-9]{6}|#[a-f0-9]{3}
This will find all occurences of hex colour codes (they're either 3 or 6 digits long). But when I flip it around like this
#[a-f0-9]{3}|#[a-f0-9]{6}
it will only find the 3 digit ones or the first 3 digits of the 6 digit ones. This does make sense and a ...
How do you create a random string that's suitable for a session ID in PostgreSQL?
...
Note that this returns strings over the "hex digits alphabet" {0..9,a..f} only. May not be sufficient -- depends on what you want to do with them.
– Laryx Decidua
Jul 13 '12 at 13:40
...
git: How to diff changed files versus previous versions after a pull?
...st version of the file" - the commit "ID" (SHA1 hash) is that 40-character hex right at the top of every entry in the output of git log. It's the hash for the entire commit, not for a given file. You don't really ever need more - if you want to diff just one file across the pull, do
git diff HEAD@{...
一文了解大数据领域创业的机会与方向 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...据处理工具应该是有着漂亮UI，功能按键和数据可视化等模块的完整产品，而不是一堆代码。
再说2C方向。
大数据一个很大的作用就是为决策做依据，以前做决定是“拍脑袋”决定，现在，做决定是根据数据结果。在我们的生...
How to display gpg key details without importing it?
...
To get the key IDs (8 bytes, 16 hex digits), this is the com
Can a JSON value contain a multiline string
...aracter-except-"-or-\-or-control-character
\"
\\
\/
\b
\f
\n
\r
\t
\u four-hex-digits
Newlines are "control characters" so, no, you may not have a literal newline within your string. However you may encode it using whatever combination of \n and \r you require.
The JSONLint tool confirms that you...
How can I hash a password in Java?
...
You may want to be a bit wary of byte to hex conversions with BigInteger: leading zeros are removed. That's ok for quick debug, but I have seen bugs in production code due to that effect.
– Thomas Pornin
May 19 '10 at 12:21
...
Literal suffix for byte in .NET?
... SB is two-fold.
One, the B suffix is ambiguous if you're writing in hexadecimal (what
does 0xFFB mean?) and even if we had a solution for that, or another
character than 'B' ('Y' was considered, F# uses this) no one could
remember whether the default was signed or unsigned - .NET bytes ...
How to parse a string to an int in C++?
...her bases by setting the stream to the correct mode (e.g. ss << std::hex) before trying the conversion. But this means the caller must know a priori what base the number is -- and how can the caller possibly know that? The caller doesn't know what the number is yet. They don't even know that i...