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How to delete from multiple tables in MySQL?

...ity, there are other ways of doing with EXISTS, NOT EXISTS, IN, NOT IN and etc. But the one above where you specify from which tables to delete with an alias before the FROM clause can get you out of a few pretty tight spots more easily. I tend to reach out to an EXISTS in 99% of the cases and the...
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How to use the PI constant in C++

...t take this approach, we people make mistakes, rounding, copy&pasting, etc. I think using M_PI is the right approach. – nacho4d Jan 21 '14 at 1:47 11 ...
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Android emulator doesn't take keyboard input - SDK tools rev 20

...below: If you notice that the soft (screen-based) main keys Back, Home, etc. are missing from your emulator you can set hw.mainKeys=no to enable them. Original answer Even though the developer documentation says keyboard support is enabled by default it doesn't seem to be that way in SDK rev ...
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What file uses .md extension and how should I edit them?

...it adds to the .txt file can wreak havoc on other editors (vim, Notepad++, etc). Much better to work in plain text when dealing with .txt and use a word processor or Acrobat for non .txt textual files like .doc and .pdf. – labyrinth Mar 24 '15 at 20:56 ...
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Wait for a process to finish

... plink me@oracle box -pw redacted "pwait 6998";email -b -s "It's done" etc just allowed me to go home now instead of hours from now. – zzxyz Aug 17 '17 at 1:24 add a comme...
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What good are SQL Server schemas?

...ures, views together. All employee-related objects in the employee schema, etc. You can also give permissions to just one schema, so that users can only see the schema they have access to and nothing else. share | ...
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Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools

... new laptop (x64), I wanted to go x64 all the way (jvm, jdk, jre, eclipse, etc..). But once I finished setting everything up I realized that the Android SDK wasn't x64, so I had issues. Go back to x86 jvm and you should be ok. EDIT: 11/14/13 I've seen some recent activity and figured I would elabo...
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How do I return early from a rake task?

...ak is a bad idea since it doesn't just jump out of the current proc/method/etc. -- it exits the entire process and skips any code that the caller method may have intended to be run afterwards (including possibly some cleanup). But for a rake task I guess it's probably not a problem... ...
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How can I convert a zero-terminated byte array to string?

... to something that is hopefully a valid UTF-8 string (and not say, Latin-1 etc., or some malformed UTF-8 sequence). Go will not check this for you when you cast. – Cameron Kerr Jun 10 '17 at 9:41 ...
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Perform .join on value in array of objects

...rscore.js which has tons of utilities for dealing with arrays, collections etc. With underscore you could do this easily with one line of code: _.pluck(arr, 'name').join(', ') share | improve this...