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Evaluating a mathematical expression in a string
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eval is evil
eval("__import__('os').remove('important file')") # arbitrary commands
eval("9**9**9**9**9**9**9**9", {'__builtins__': None}) # CPU, memory
Note: even if you use set __builtins__ to None it still might be possible to break out using introspection:
eval('(1).__class__.__bases_...
Search for one value in any column of any table inside a database
...several other features such as relationship diagrams and such…
I was a bit slow on large (40GB TFS Database) databases though…
Apart from this there is also SSMS Tools pack that offers a lot of other features that are quite useful even though these are not directly related to searching tex...
How do I detect what .NET Framework versions and service packs are installed?
... , but it was specific to .NET 3.5. Specifically, I'm looking for the following:
13 Answers
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汇编语言(王爽著)附书签 - 文档下载 - 清泛网 - 专注C/C++及内核技术
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第17章 使用BIOS进行键盘输入和磁盘读写
综合研究
附注WinXP,Win7,Win8,Win1034.7M
Smart way to truncate long strings
...re element. If you want to truncate part of a string, without wrapping the bit you want to truncate in a span or other html element, this won't work e.g.: Your picture ('some very long picture filename truncated...') has been uploaded.
– Chris
Apr 8 '13 at 18:3...
How do I profile memory usage in Python?
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Official guppy documentation is a bit minimial; for other resources see this example and the heapy essay.
– tutuDajuju
Jul 1 '15 at 18:30
1...
What are the file limits in Git (number and size)?
...ver really looks at less than the whole repo. Even if you
limit things a bit (ie check out just a portion, or have the history go
back just a bit), git ends up still always caring about the whole thing,
and carrying the knowledge around.
So git scales really badly if you force it to look ...
PHP/MySQL insert row then get 'id'
...int in PHP). If your AUTO_INCREMENT column has a column type of BIGINT (64 bits) the conversion may result in an incorrect value. Instead, use the internal MySQL SQL function LAST_INSERT_ID() in an SQL query. For more information about PHP's maximum integer values, please see the integer documentati...
How do you get a timestamp in JavaScript?
...es:
By providing |, you tell the interpreter to do a binary OR operation. Bit operations require absolute numbers which turns the decimal result from Date.now() / 1000 into an integer.
During that conversion, decimals are removed, resulting in the same result as using Math.floor() but using less...
Convert PDF to image with high resolution
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It appears that the following works:
convert \
-verbose \
-density 150 \
-trim \
test.pdf \
-quality 100 \
-flatten \
-sharpen 0x1.0 \
24-18.jpg
It results in the left image. Compa...
