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Plot two graphs in same plot in R

...leading. – RMurphy Feb 15 '17 at 21:32 1 the add parameter works for some plot methods, but not t...
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ALTER TABLE to add a composite primary key

I have a table called provider . I have three columns called person , place , thing . There can be duplicate persons, duplicate places, and duplicate things, but there can never be a dupicate person-place-thing combination. ...
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Swift: Pass array by reference?

... @Boon Array is still semantically copied/passed-by-value, but just optimised to use COW. – eonil Oct 14 '14 at 3:38 ...
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'Must Override a Superclass Method' Errors after importing a project into Eclipse

Anytime I have to re-import my projects into Eclipse (if I reinstalled Eclipse, or changed the location of the projects), almost all of my overridden methods are not formatted correctly, causing the error: ...
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How to create a CPU spike with a bash command

...ate a near 100% load on a Linux machine. It's quad core system and I want all cores going full speed. Ideally, the CPU load would last a designated amount of time and then stop. I'm hoping there's some trick in bash. I'm thinking some sort of infinite loop. ...
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How to develop a soft keyboard for Android? [closed]

... clone this repo: LatinIME About your questions: An inputMethod is basically an Android Service, so yes, you can do HTTP and all the stuff you can do in a Service. You can open Activities and dialogs from the InputMethod. Once again, it's just a Service. I've been developing an IME, so ask agai...
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How to check if mod_rewrite is enabled in php?

...ng mod_php, you can use apache_get_modules(). This will return an array of all enabled modules, so to check if mod_rewrite is enabled, you could simply do in_array('mod_rewrite', apache_get_modules()); Unfortunately, you're most likely trying to do this with CGI, which makes it a little bit more ...
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Disabling swap files creation in vim

...ere a way to disable .swp files creation in vim? or at least create them all in one place so I can find and delete them easily. ...
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Print a file's last modified date in Bash

... to find how to print out the date of a file. I'm so far able to print out all the files in a directory, but I need to print out the dates with it. ...
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SQL Server SELECT INTO @variable?

... In case if you aren't using the database type that the OP is using, not all support TOP 1 as Adrian mentioned. SQL Server / MS Access use TOP, MySQL uses LIMIT, and Oracle uses ROWNUM. See w3schools.com/sql/sql_top.asp for more information. – Tyler Jul 7 '17...