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How do SQL EXISTS statements work?
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I think my confusion might be that I've read that the subquery with an EXISTS returns true or false; but this can't be the only thing that it returns, right? Is the subquery also returning all "suppliers who have corresponding rows in the orders table"? But if it i...
Should I put #! (shebang) in Python scripts, and what form should it take?
...ncrete advantage to including it besides taste: it makes clear to a future reader of the file that they're reading an executable script, rather than a file that's meant to be imported. Similarly to public/private access control modifiers in languages that have them, shebangs are useful as documentat...
for each loop in Objective-C for accessing NSMutable dictionary
...collections which lets you enumerate keys instead of values. I suggest you read about fast enumeration in the Collections Programming Topic.
Oh, I should add however that you should NEVER modify a collection while enumerating through it.
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In PyCharm, how to go back to last location?
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Thanks for the guidance, it works. But alt+left was already taken for me to another action.
– Benyamin Jafari
May 3 '19 at 6:46
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How to use the same C++ code for Android and iOS?
...hine. So the only way to access C++ code is using JNI, please take time to read the basics of JNI. Fortunately, today's Android Studio IDE has vast improvements on JNI side, and a lot of problems are shown to you while you edit your code.
The code by steps
Our sample is a simple app that you send ...
mkdir's “-p” option
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Allows one to list the contents of a directory. It does not allow the reading of files.
i (insert)
Allows one to create new files in a directory or copy new files to a directory.
d (delete)
Allows one to remove files and sub-directories from a directory.
a (administer)
Allows one...
Haskell: Where vs. Let
... by Where vs. Let . They both seem to provide a similar purpose. I have read a few comparisons between Where vs. Let but I am having trouble discerning when to use each. Could someone please provide some context or perhaps a few examples that demonstrate when to use one over the other?
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Simplest PHP example for retrieving user_timeline with Twitter API version 1.1
... so make a note of them somewhere.
4. Change access level: You don't want read-only, do you?
If you want to make any decent use of this API, you'll need to change your settings to Read & Write if you're doing anything other than standard data retrieval using GET requests.
Choose the "Settings...
click() event is calling twice in jquery
...ton").unbind(); or make a simple test to check how many times that code is read, if more than once...
– TheSystem
Jul 19 '11 at 10:59
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Different ways of loading a file as an InputStream
...you are loading the class from an Application Server, so your should use Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName) instead of this.getClass().getClassLoader().getResourceAsStream(fileName). this.getClass().getResourceAsStream() will also work.
Read this article for...