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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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# 这是一个自动打ipa的脚本，基于webfrogs的ipa-build书写：https://github.com/webfrogs/xcode_shell/blob/master/ipa-build
# 功能：自动为etao ios app打包，产出物为14个渠道的ipa包
# 特色：全自动打包，不需要输入任何参数
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Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...hape2 and the tidyverse came plyr, with the daply function, as shown here: https://stackoverflow.com/a/7020101/210673
library(plyr)
daply(tmp, .(x, y), function(x) x$z)
## y
## x a b c
## x 1 2 3
## y 3 3 2
Using matrix indexing:
This is kinda old school but is a nice demonstration of m...
Fast permutation -> number -> permutation mapping algorithms
....1
("The Lehmer code (inversion table)", p.232ff) of the fxtbook:
http://www.jjj.de/fxt/#fxtbook
skip to section 10.1.1.1 ("Computation with large arrays" p.235) for the fast method.
The (GPLed, C++) code is on the same web page.
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Overloading Macro on Number of Arguments
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PS: __NARG__ is copied from Laurent Deniau & Roland Illig here: https://groups.google.com/group/comp.std.c/browse_thread/thread/77ee8c8f92e4a3fb/346fc464319b1ee5?pli=1
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Entity Framework rollback and remove bad migration
...SCRIPTION
This topic describes the Entity Framework Core commands. See https://docs.efproject.net for information on Entity Framework Core.
The following Entity Framework cmdlets are included.
Cmdlet Description
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How do I sort an observable collection?
...exity of the interface involved and its relatively poor documentation (see https://stackoverflow.com/a/5883947/33080).
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Difference between core and processor
...g the complexity of a modern multi-processor, multi-core system.
Source:
https://software.intel.com/en-us/articles/intel-performance-counter-monitor-a-better-way-to-measure-cpu-utilization
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Hash and salt passwords in C#
...ctions like SHA256 weren't really intended for use with storing passwords:
https://patrickmn.com/security/storing-passwords-securely/#notpasswordhashes
Instead adaptive key derivation functions like PBKDF2, bcrypt or scrypt were. Here is a PBKDF2 based one that Microsoft wrote for PasswordHasher in...
How to convert an entire MySQL database characterset and collation to UTF-8?
...roduct CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
refer to: https://confluence.atlassian.com/display/CONFKB/How+to+Fix+the+Collation+and+Character+Set+of+a+MySQL+Database
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Type List vs type ArrayList in Java [duplicate]
...urn a list of the same type.
For example of someone getting burned, in https://stackoverflow.com/a/1481123/139985 the poster had problems with "slicing" because ArrayList.sublist(...) doesn't return an ArrayList ... and he had designed his code to use ArrayList as the type of all of his list var...