大约有 8,300 项符合查询结果（耗时：0.0218秒） [XML]
How to do an INNER JOIN on multiple columns
I'm working on a homework project and I'm supposed to perform a database query which finds flights either by the city name or the airport code, but the flights table only contains the airport codes so if I want to search by city I have to join on the airports table.
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How do I tar a directory of files and folders without including the directory itself?
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cd my_directory/ && tar -zcvf ../my_dir.tgz . && cd -
should do the job in one line. It works well for hidden files as well. "*" doesn't expand hidden files by path name expansion at least in bash. Below is my experiment:
$ mkdir my_director...
Use find command but exclude files in two directories
I want to find files that end with _peaks.bed , but exclude files in the tmp and scripts folders.
6 Answers
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Node.js check if file exists
How do i check the existence of a file ?
17 Answers
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How to implement a ViewPager with different Fragments / Layouts
...tart an activity which implements viewpager, the viewpager created various fragments. I want to use different layouts for each fragment, but the problem is that viewpager shows only two layouts at the max (second layout on all of the remaining fragments after 1).
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Display number with leading zeros
...(and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the same behavior can be achieved with f-strings:
print(f"{1:02d}")
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How to convert an int to a hex string?
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You are looking for the chr function.
You seem to be mixing decimal representations of integers and hex representations of integers, so it's not entirely clear what you need. Based on the description you gave, I think one of these snippets ...
Run git pull over all subdirectories [duplicate]
How can I update multiple git repositories from their shared parent's directory without cd 'ing into each repo's root directory? I have the following which are all separate git repositories ( not submodules):
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Pass parameters in setInterval function
Please advise how to pass parameters into a function called using setInterval .
15 Answers
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Check if a file exists with wildcard in shell script [duplicate]
I'm trying to check if a file exists, but with a wildcard. Here is my example:
21 Answers
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