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Get child node index
... jQuery, etc.), is there a way to determine a child node's index inside of its parent node without iterating over and comparing all children nodes?
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What's the best way to build a string of delimited items in Java?
While working in a Java app, I recently needed to assemble a comma-delimited list of values to pass to another web service without knowing how many elements there would be in advance. The best I could come up with off the top of my head was something like this:
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Finding out whether a string is numeric or not
...mbers only. I am taking out a substring from a string and want to check if it is a numeric substring or not.
18 Answers
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How to change href of tag on button click through javascript
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Without having a href, the click will reload the current page, so you need something like this:
<a href="#" onclick="f1()">jhhghj</a>
Or prevent the scroll like this:
<a href="#" onclick="f1(); return false;...
Devise Secret Key was not set
...an bundle update this morning and started getting the same error.
I added it as a line in config/initializers/devise.rb and the error was fixed.
This seems to be the commit which introduced it.
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Java - sending HTTP parameters via POST method easily
I am successfully using this code to send HTTP requests with some parameters via GET method
17 Answers
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Where'd padding go, when setting background Drawable?
I have this issue on my EditText and Button views, where I have a nice padding for them to space away from the text, but when I change the background with setBackgroundDrawable or setBackgroundResource that padding is lost forever.
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(How) can I count the items in an enum?
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There's not really a good way to do this, usually you see an extra item in the enum, i.e.
enum foobar {foo, bar, baz, quz, FOOBAR_NR_ITEMS};
So then you can do:
int fuz[FOOBAR_NR_ITEMS];
Still not very nice though.
But of course you do realize that just the number of items in an enum ...
Is there a practical use for weak references? [duplicate]
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If you want to keep a reference to something as long as it is used elsewhere e.g. a Listener, you can use a weak reference.
WeakHashMap can be used as a short lived cache of keys to derived data. It can also be used to keep information about objects used else where and you don't...
Access Container View Controller from Parent iOS
in iOS6 I noticed the new Container View but am not quite sure how to access it's controller from the containing view.
11 A...