大约有 13,071 项符合查询结果(耗时:0.0150秒) [XML]

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Is null an Object?

Is null an Object in Java? 15 Answers 15 ...
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How can I write a heredoc to a file in Bash script?

How can I write a here document to a file in Bash script? 9 Answers 9 ...
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Confused by python file mode “w+”

... Let's say you're opening the file with a with statement like you should be. Then you'd do something like this to read from your file: with open('somefile.txt', 'w+') as f: # Note that f has now been truncated to 0 bytes, so you'll o...
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What's a concise way to check that environment variables are set in a Unix shell script?

I've got a few Unix shell scripts where I need to check that certain environment variables are set before I start doing stuff, so I do this sort of thing: ...
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Undo a Git merge that hasn't been pushed yet

Within my master branch, I did a git merge some-other-branch locally, but never pushed the changes to origin master. I didn't mean to merge, so I'd like to undo it. When doing a git status after my merge, I was getting this message: ...
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How do you attach a new pull request to an existing issue on github?

I'm not sure, but I have a vague memory of creating a github pull request with "Issue 4" or something in the title, and it automatically attached itself to Issue 4 in the project that I was submitting it to. I tried it again recently and it didn't work -- it just created a brand new issue instead. I...
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How can I delete a file from a Git repository?

...d "file1.txt" to a Git repository. After that, I committed it, added a couple of directories called dir1 and dir2 , and committed them to the Git repository. ...
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How does Facebook Sharer select Images and other metadata when sharing my URL?

When using Facebook Sharer, Facebook will offer the user the option of using 1 of a few images pulled from the source as a preview for their link. How are these images selected, and how can I ensure that any particular image on my page is always included in this list? ...
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What's the difference between Unicode and UTF-8? [duplicate]

... most editors support save as ‘Unicode’ encoding actually. This is an unfortunate misnaming perpetrated by Windows. Because Windows uses UTF-16LE encoding internally as the memory storage format for Unicode strings, it considers this...
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What exactly is a Maven Snapshot and why do we need it?

I am a bit confused about the meaning of a Maven Snapshot and why we build one? 13 Answers ...