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Generating a UUID in Postgres for Insert statement?
...)::text || ':' || clock_timestamp()::text) placing '4' from 13) placing to_hex(floor(random()*(11-8+1) + 8)::int)::text from 17)::cstring);
* Thanks to @Denis Stafichuk @Karsten and @autronix
Also, in modern Postgres, you can simply cast:
SELECT md5(random()::text || clock_timestamp()::text)...
use Winmerge inside of Git to file diff
...
)
REM diff is called by git with 7 parameters:
REM path old-file old-hex old-mode new-file new-hex new-mode
copy %TEMP%\%~nx2 %GIT_DIFF_OLD_FILES%\%1
copy %5 %GIT_DIFF_NEW_FILES%
:END
It is not robust enough to handle files with same names in different directories, but it gives you a genera...
How to pass “Null” (a real surname!) to a SOAP web service in ActionScript 3
...n entire text value that would otherwise cause encoding/decoding problems. Hex encoding, for instance, is meant for individual characters. CDATA values are preferred when you're escaping the entire text of an element. The biggest reason for this is that it maintains human readability.
...
How is a CRC32 checksum calculated?
... x10 + x8 + x7 + x5 + x4 + x2 + x + 1
Wikipedia
CRC calculation
Or in hex and binary:
0x 01 04 C1 1D B7
1 0000 0100 1100 0001 0001 1101 1011 0111
The highest term (x32) is usually not explicitly written, so it can instead be represented in hex just as
0x 04 C1 1D B7
Feel free to c...
Behaviour of increment and decrement operators in Python
...it will be garbage collected later.
Give it a try yourself:
a = 1
print(hex(id(a)))
a += 1
print(hex(id(a)))
腾讯Tencent开源框架介绍（持续更新） - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...库、RPC、各种客户端等。主要特点为易用性强、长尾延迟低。
https://github.com/Tencent/3TS Tencent Transaction Processing Testbed System（简称3TS），是腾讯公司CynosDB（TDSQL）团队与中国人民大学数据工程与知识工程教育部重点实验室，联...
What is the difference between NULL, '\0' and 0?
... zeroes).
string context - the character representing the digit zero has a hex value of 0x30, whereas the NUL character has hex value of 0x00 (used for terminating strings).
These three are always different when you look at the memory:
NULL - 0x00000000 or 0x00000000'00000000 (32 vs 64 bit)
NUL -...
推荐系统算法初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...味偏小众的用户无法找到自己感兴趣的内容。
目的2. 降低信息过载
互联网时代信息量已然处于爆炸状态，若是将所有内容都放在网站首页上用户是无从阅读的，信息的利用率将会十分低下。因此我们需要推荐系统来帮助用户...
Generating Random Passwords
...method (base 62) is superior than the GUID(base 16) on strength: an 8-char hex string is equivalent to a 4-5 char alphanumeric one
– Jimmy
Sep 10 '08 at 18:51
59
...
Verifying signed git commits?
... in raw format in its error output, which has been corrected to give it in hex.
show_one_mergetag: print non-parent in hex form.
When a mergetag names a non-parent, which can occur after a shallow
clone, its hash was previously printed as raw data.
Print it in hex form instead.
Tested...