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vim 命令与快捷键 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...A:行末o:光标后插入新行O:光标上插入新行定位h:leftj:downk:upl:right$:行尾0:行首H:...:set nu 设置行号 插入命令 i:光标后 I:行首 a:光标前 A:行末 o:光标后插入新行 O:光标上插入新行 定位 h:left j:down k:up l:right $:行尾 0:...
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How do I rename the extension for a bunch of files?

...o external calls), see one of the other answers. The following would do and does not require the system to have the rename program (although you would most often have this on a system): for file in *.html; do mv "$file" "$(basename "$file" .html).txt" done EDIT: As pointed out in the comme...
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What exactly does the “u” do? “git push -u origin master” vs “git push origin master”

I'm apparently terrible at using git, despite my best attempts to understand it. 4 Answers ...
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How does collections.defaultdict work?

...re precisely, it's an arbitrary "callable" object, which includes function and type objects). For the first example, default items are created using int(), which will return the integer object 0. For the second example, default items are created using list(), which returns a new empty list object....
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Do I really need to encode '&' as '&'?

I'm using an ' & ' symbol with HTML5 and UTF-8 in my site's <title> . Google shows the ampersand fine on its SERPs, as do all the browsers in their titles. ...
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IntelliJ inspection gives “Cannot resolve symbol” but still compiles code

... First of all you should try File | Invalidate Caches and if it doesn't help, delete IDEA system directory. Then re-import the Maven project and see if it helps. In some weird cases compiled classes may report wrong info and confuse IDEA. Verify that the classes from this jar r...
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Shuffling a list of objects

I have a list of objects and I want to shuffle them. I thought I could use the random.shuffle method, but this seems to fail when the list is of objects. Is there a method for shuffling objects or another way around this? ...
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How to get a variable value if variable name is stored as string?

... rest of parameter as the name of the variable; this variable is then expanded and that value is used in the rest of the substitution, rather than the value of parameter itself. share | improve...
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.NET: Simplest way to send POST with data and read response

...rol over the HTTP headers, you could attempt the same using HttpWebRequest and reference RFC2616 (w3.org/Protocols/rfc2616/rfc2616.txt). Answers from jball and BFree follow that attempt. – Chris Hutchinson Nov 3 '10 at 15:30 ...
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How does `scp` differ from `rsync`?

...n these tools is how they copy files. scp basically reads the source file and writes it to the destination. It performs a plain linear copy, locally, or over a network. rsync also copies files locally or over a network. But it employs a special delta transfer algorithm and a few optimizations to m...