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Is there shorthand for returning a default value if None in Python? [duplicate]
In C#, I can say x ?? "" , which will give me x if x is not null, and the empty string if x is null. I've found it useful for working with databases.
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How do I check to see if a value is an integer in MySQL?
I see that within MySQL there are Cast() and Convert() functions to create integers from values, but is there any way to check to see if a value is an integer? Something like is_int() in PHP is what I am looking for.
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Copy/duplicate database without using mysqldump
...e uses a "SHOW CREATE TABLE" statement which generates a CREATE TABLE with all properties of the original.
– Danita
May 6 '11 at 15:34
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Save current directory in variable using Bash?
What I'm trying to do is find the current working directory and save it into a variable, so that I can run export PATH=$PATH:currentdir+somethingelse . I'm not entirely sure if they have a variable that contains cwd by default.
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那些微信公众大号是如何赚钱的？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...在测试的10天内获得的广告收入过万。另据新媒体排行榜CEO徐达内透露，拥有百万级粉丝的公众号1个月可通过“广点通”获得10万元以上的收入。不过，在今年春节后，“广点通”的收入大打折扣，变成了“廉价流量”。
很多...
Are there any smart cases of runtime code modification?
...some Unices.
Sometimes code is translated into code at runtime (this is called dynamic binary translation):
Emulators like Apple's Rosetta use this technique to speed up emulation. Another example is Transmeta's code morphing software.
Sophisticated debuggers and profilers like Valgrind or Pin u...
Pandas read_csv low_memory and dtype options
When calling
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Get unique values from a list in python [duplicate]
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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...RACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor ...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...RACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studio, it has limited features. We enabled App Inventor ...