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创业测试：50个迹象表明你真该创业了 - 资讯 - 清泛网 - 专注C/C++及内核技术
...号。帮助他人提高生活水平的愿望可以让你无论在公司的低谷还是高峰都能动力十足。我发现近些年来，最强大的公司最初的出发点都是想要帮助世界解决难题。
8.你对于创办一家更好的公司充满信心。也许这是因为你自信或...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...malloc的优化
Jmalloc小对象也根据size-class，但是它使用了低地址优先的策略，来降低内存碎片化。
Jemalloc大概需要2%的额外开销。（tcmalloc 1%， ptmalloc最少8B）
Jemalloc和tcmalloc类似的线程本地缓存，避免锁的竞争
相对未使用的页...
How can I find the data structure that represents mine layout of Minesweeper in memory?
...hat you need to do is look at the memory space of the running program. The hex editor HxD has a feature that lets you just that.
Once you're in the memory space, it is a matter of taking snapshots of the memory while you mess around with the board. Isolate what changes versus what doesn't. When ...
How do I remove newlines from a text file?
...ork then you're going to have to inspect your file more closely (e.g. in a hex editor) to find out what characters are actually in there that you want to remove.
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What are bitwise shift (bit-shift) operators and how do they work?
... a given pixel color value encoded in a 32-bit word.
Pixel-Color Value in Hex: B9B9B900
Pixel-Color Value in Binary: 10111001 10111001 10111001 00000000
For better understanding, the same binary value labeled with what sections represent what color part.
Red...
How to set text color to a text view programmatically [duplicate]
...
0xFFBDBDBD is the hexadecimal reprecentation of an integer, where the different parts represent the amounts of alpha, red, green and blue (0xAARRGGBB) (the 0xff means the alpha is completely white - that is, no transparency). "#bdbdbd" is a st...
What is the difference between conversion specifiers %i and %d in formatted IO functions (*printf /
...ger as a signed decimal number, but %i defaults to decimal but also allows hexadecimal (if preceded by 0x) and octal (if preceded by 0).
So 033 would be 27 with %i but 33 with %d.
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Generating Guids in Ruby
...e tokens in Ruby
>> require 'digest'
=> []
>> Digest::SHA1.hexdigest("some-random-string")[8..16]
=> "2ebe5597f"
>> SecureRandom.base64(8).gsub("/","_").gsub(/=+$/,"")
=> "AEWQyovNFo0"
>> rand(36**8).to_s(36)
=> "uur0cj2h"
...
Where are my postgres *.conf files?
...e_min_age = 50000000
#vacuum_freeze_table_age = 150000000
#bytea_output = 'hex' # hex, escape
#xmlbinary = 'base64'
#xmloption = 'content'
# - Locale and Formatting -
datestyle = 'iso, mdy'
#intervalstyle = 'postgres'
#timezone = '(defaults to server environment setting)'
#timezone_abbre...
Does Git warn me if a shorthand commit ID can refer to 2 different commits?
...RT_NAME_AMBIGUOUS))
return error("short SHA1 %.*s is ambiguous.", len, hex_pfx);
and this:
if (!ds->candidate_checked)
/*
* If this is the only candidate, there is no point
* calling the disambiguation hint callback.
*
* On the other hand, if the current candidate
...