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Why are exclamation marks used in Ruby methods?
...ral, methods that end in ! indicate that the method will modify the object it's called on. Ruby calls these as "dangerous methods" because they change state that someone else might have a reference to. Here's a simple example for strings:
foo = "A STRING" # a string called foo
foo.downcase! # ...
Activity has leaked ServiceConnection @438030a8 that was original
I'm working on my first Android app. I've got three activities in my app, and the user switches back and forth pretty frequently. I've also got a remote service, which handles a telnet connection. The apps need to bind to this service in order to send/receive telnet messages.
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Create an Array of Arraylists
...ayList<Individual>>(4);
As suggested by Tom Hawting - tackline, it is even better to do:
List<List<Individual>> group = new ArrayList<List<Individual>>(4);
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Can you force Visual Studio to always run as an Administrator in Windows 8?
In Windows 7, you could go into a programs compatibility settings and check off to always run as an Administrator. Is there a similar option in Windows 8?
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Nginx serves .php files as downloads, instead of executing them
I am installing a website in a droplet (Digital Ocean). I have a issue for install NGINX with PHP properly. I did a tutorial https://www.digitalocean.com/community/tutorials/how-to-install-linux-nginx-mysql-php-lemp-stack-on-ubuntu-14-04 but when I try to run some .php file it's just downloading i...
Is optimisation level -O3 dangerous in g++?
... various sources (though mostly from a colleague of mine), that compiling with an optimisation level of -O3 in g++ is somehow 'dangerous', and should be avoided in general unless proven to be necessary.
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How do I create a Bash alias?
...en I had bought my Mac, the .bash_login file wasn't there. I had to create it for myself so that I could put prompt info, alias, functions, etc. in it.
Here are the steps if you would like to create one:
Start up Terminal
Type cd ~/ to go to your home folder
Type touch .bash_profile to create yo...
Create a string with n characters
Is there a way in java to create a string with a specified number of a specified character? In my case, I would need to create a string with 10 spaces. My current code is:
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What happens when a duplicate key is put into a HashMap?
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By definition, the put command replaces the previous value associated with the given key in the map (conceptually like an array indexing operation for primitive types).
The map simply drops its reference to the value. If nothing el...
Xcode : failed to get the task for process
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edited Mar 26 '17 at 18:06
answered Sep 20 '13 at 13:52
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