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How to get the nth element of a python list or a default if not available
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try:
a = b[n]
except IndexError:
a = default
Edit: I removed the check for TypeError - probably better to let the caller handle this.
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im...
Alias with variable in bash [duplicate]
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Please fix the syntax error (missing ; before }) and double-quote $1 so as to also support filenames with embedded whitespace and other shell metacharacters.
– mklement0
Feb 21 '16 at 22:22
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How can I delete a newline if it is the last character in a file?
...hing that could be interpreted as a format specifier like %d, you'd get an error. A fix would be to change it to printf "%s" $0
– Robin A. Meade
Oct 11 '19 at 23:42
add a comm...
Git: Permission denied (publickey) fatal - Could not read from remote repository. while cloning Git
I am unable to clone a Git repository, and getting this error:
30 Answers
30
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`elif` in list comprehension conditionals
... do this.
– dTanMan
Nov 7 '19 at 16:05
add a comment
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MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...以自动投票，选举出新的Master，并引导其余的Slave服务器连接新的Master，
而这个过程对于应用是透明的。可以说MongoDB的副本集是自带故障转移功能的主从复制。
1 相对于传统主从模式的优势
传统的主从模式，需要手工指定...
Reference: mod_rewrite, URL rewriting and “pretty links” explained
...ur RewriteRules still wouldn't work anyway.
It's meant to prevent HTTP 500 errors. What it usually accomplishes is gracing your users with HTTP 404 errors instead. (Not so much more user-friendly if you think about it.)
Practically it just suppresses the more useful log entries, or server notificati...
Format date and time in a Windows batch script
...:: Check WMIC is available
WMIC.EXE Alias /? >NUL 2>&1 || GOTO s_error
:: Use WMIC to retrieve date and time
FOR /F "skip=1 tokens=1-6" %%G IN ('WMIC Path Win32_LocalTime Get Day^,Hour^,Minute^,Month^,Second^,Year /Format:table') DO (
IF "%%~L"=="" goto s_done
Set _yyyy=%%L
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Correct format specifier for double in printf
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Note that g++ rejects %lf when compiling with -Wall -Werror -pedantic: error: ISO C++ does not support the ‘%lf’ gnu_printf format
– kynan
Jun 10 '13 at 12:16
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多图选择器使用指导 · App Inventor 2 中文网
...，本案例不上传数据。
导入 MultiImagePickerAllFeatures.aia，连接最新伴侣，或编译独立安装包。真机／伴侣运行尚未实测。
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MimeFilter及设计器
应用image/*、JPEG、P...