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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;...
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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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...
(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 ...
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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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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How to send a message to a particular client with socket.io
I'm starting with socket.io + node.js, I know how to send a message locally and to broadcast socket.broadcast.emit() function:- all the connected clients receive the same message.
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Android - set TextView TextStyle programmatically?
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edited Jul 26 '17 at 20:26
Thomas Vos
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