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MySQL Error 1215: Cannot add foreign key constraint
...y are primary keys in their own tables. I have done both of these things, if I'm not mistaken. Any other help you guys could offer?
...
Input text dialog Android
...rtDialog. You can customize the type of input allowed using setInputType, if you need.
If you're able to use a member variable, you can simply set the variable to the value of the EditText, and it will persist after the dialog has dismissed. If you can't use a member variable, you may need to use...
What ports does RabbitMQ use?
...itmq.com/configure.html#define-environment-variables
The number might be differently if changed by someone in the rabbitmq configuration file:
vi /etc/rabbitmq/rabbitmq-env.conf
Ask the computer to tell you:
sudo nmap -p 1-65535 localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2014-09-19 13...
How to sort a list in Scala by two fields?
...
what if we want to reverse sort on lastName and then natural sort on firstName?
– Sachin K
Jun 18 '14 at 9:19
...
How to run Node.js as a background process and never die?
...
Simple solution (if you are not interested in coming back to the process, just want it to keep running):
nohup node server.js &
There's also the jobs command to see an indexed list of those backgrounded processes. And you can kill a b...
Convert duration to hours:minutes:seconds (or similar) in Rails 3 or Ruby
...
Also, if you want this to be very specific and not "round" the duration, check out Radar's gem: github.com/radar/distance_of_time_in_words. Drop-in replacement for distance_of_time_in_words and you can get the rounded number by pas...
Getting values from query string in an url using AngularJS $location
...
Not sure if it has changed since the accepted answer was accepted, but it is possible.
$location.search() will return an object of key-value pairs, the same pairs as the query string. A key that has no value is just stored in the obj...
Toggle input disabled attribute using jQuery
...return this.each(function() {
var $this = $(this);
if ($this.attr('disabled')) $this.removeAttr('disabled');
else $this.attr('disabled', 'disabled');
});
};
})(jQuery);
Example link.
EDIT: updated the example link/code to maintaining chainability!...
How to convert a Collection to List?
...rrayList(coll);
Collections.sort(list);
As Erel Segal Halevi says below, if coll is already a list, you can skip step one. But that would depend on the internals of TreeBidiMap.
List list;
if (coll instanceof List)
list = (List)coll;
else
list = new ArrayList(coll);
...
How to get the home directory in Python?
...on all platforms:
from os.path import expanduser
home = expanduser("~")
If you're on Python 3.5+ you can use pathlib.Path.home():
from pathlib import Path
home = str(Path.home())
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