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Rails 3 migrations: Adding reference column?
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If you are using the Rails 4.x you can now generate migrations with references, like this:
rails generate migration AddUserRefToProducts user:references
like you can see on rails guides
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Get current URL of UIWebView
...his, it worked and was accepted and 30+ people felt it worked too. This is now 5.5 years old. Good stuff, Rengers. Thanks for pointing people to Matt's answer below.
– App Dev Guy
Nov 30 '15 at 6:38
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Iterate through options
... 0; i < select.length; i++){
var option = select.options[i];
// now have option.text, option.value
}
share
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How to count the number of set bits in a 32-bit integer?
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This is known as the 'Hamming Weight', 'popcount' or 'sideways addition'.
The 'best' algorithm really depends on which CPU you are on and what your usage pattern is.
Some CPUs have a single built-in instruction to do it and others hav...
How to set a Fragment tag by code?
...iner, new DemoFragment(), "SOMETAG").
commit();
// Now later we can lookup the fragment by tag
DemoFragment fragmentDemo = (DemoFragment)
getSupportFragmentManager().findFragmentByTag("SOMETAG");
}
}
}
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What exactly do “u” and “r” string flags do, and what are raw string literals?
While asking this question , I realized I didn't know much about raw strings. For somebody claiming to be a Django trainer, this sucks.
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JSON Array iteration in Android/Java
...of JSONArray iterable, meaning that the for (Object foo : bar) syntax will now work with it (note that foo has to be an Object, because JSONArrays do not have a declared type). All this works because the JSONArray class is backed by a simple ArrayList, which is already iterable. I imagine that other...
Remove all whitespaces from NSString
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Oh man, I like this included unit tests business. Now not only can I copy-paste my code from SO, but I can also copy-paste the tests for that code!
– TylerJames
Oct 31 '17 at 14:43
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How do I escape a single quote?
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I know this is old, but I think it's worth noting that there is an HTML entity for ": &quot;
– daiscog
Mar 21 '13 at 11:11
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Passing Parameters JavaFX FXML
...ntroller from your loader instance.
FXMLLoader instances themselves never know anything about domain objects. You do not directly pass application specific domain objects into the FXMLLoader constructor, instead you:
Construct an FXMLLoader based upon fxml markup at a specified location
Get a cont...