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Rails find record with zero has_many records associated [duplicate]
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Community♦
111 silver badge
answered Mar 8 '12 at 6:31
AndrewAndrew
39.4k4646 gold badges171171 silve...
How to check if a file is empty in Bash?
....txt
touch empty.txt
fi
I like shell scripting a lot, but one disadvantage of it is that the shell cannot help you when you misspell, whereas a compiler like your C++ compiler can help you.
Notice incidentally that I have swapped the roles of empty.txt and full.txt, as @Matthias suggests....
How to create a database from shell command?
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Matthew
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answered Mar 11 '10 at 20:29
KrisKris
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Mime type for WOFF fonts?
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MarcelMarcel
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8
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How do I see the commit differences between branches in git?
I'm on branch-X and have added a couple more commits on top of it. I want to see all the differences between MASTER and the branch that I am on in terms of commits. I could just do a
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A Java API to generate Java source files [closed]
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skaffmanskaffman
374k9292 gold badges779779 silver badges744744 bronze badges
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Is well formed without a ?
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ChristopheDChristopheD
95.7k2424 gold badges148148 silver badges167167 bronze badges
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The selected run destination is not valid for this action
I have opened a project that has always been iphone/ipad. I can't build it now because for some reason my only "Scheme" option is "MyApp My Mac 64-bit". How can I get this set back to iphone/ipad simulator and devices? My "Targeted Device Family" setting is iPhone/iPad.
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Get value of a string after last slash in JavaScript
I am already trying for over an hour and cant figure out the right way to do it, although it is probably pretty easy:
10 An...
How to access component methods from “outside” in ReactJS?
...on found here: https://facebook.github.io/react/docs/refs-and-the-dom.html#adding-a-ref-to-a-class-component
Update 2019-04-01: Changed example to use a class and createRef per latest React docs.
Update 2016-09-19: Changed example to use ref callback per guidance from the ref String attribute docs...