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How do I measure time elapsed in Java? [duplicate]
... to use in order to accomplish this in Java?
The short answer is a long. Now, more on how to measure...
System.currentTimeMillis()
The "traditional" way to do this is indeed to use System.currentTimeMillis():
long startTime = System.currentTimeMillis();
// ... do something ...
long estimatedTim...
How to use shell commands in Makefile
...e not found a quick reference link to a POSIX document for this, nor do I know off-hand which make variants support ::= assignment, although GNU make does today, with the same meaning as :=, i.e., do the assignment right now with expansion.
Note that VAR := $(shell command args...) can also be spel...
Android App Not Install. An existing package by the same name with a conflicting signature is alread
...om another SDK, the keys will definitely be different.
Also if you don't know exactly what key was used before to sign the apk and yet you want to install the new version of your app, you can just uninstall the previous application and reinstall the new one.
Hope this Helps...
Regards!
...
What exactly does the “u” do? “git push -u origin master” vs “git push origin master”
...e remote or branch, git looks at the branch.<name>.merge setting to know where to pull from. git push -u sets this information for the branch you're pushing.
To see the difference, let's use a new empty branch:
$ git checkout -b test
First, we push without -u:
$ git push origin test
$ git...
How do I preview emails in Rails?
...
Action Mailer now has a built in way of previewing emails in Rails 4.1. For example, check this out:
# located in test/mailers/previews/notifier_mailer_preview.rb
class NotifierPreview < ActionMailer::Preview
# Accessible from http:...
Why shouldn't I use mysql_* functions in PHP?
...jan Marjanovic will help you to choose.
And a better way is PDO, and I am now writing a simple PDO tutorial.
A simple and short PDO tutorial
Q. First question in my mind was: what is `PDO`?
A. “PDO – PHP Data Objects – is a database access layer providing a uniform method of access to ...
Is there a command for formatting HTML in the Atom editor?
... box.
Choose atom-beautify or one of the other packages and click Install.
Now you can use the default keybinding for atom-beautify CTRL + ALT + B to beautify your HTML (CTRL + OPTION + B on a Mac).
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Configure apache to listen on port other than 80
...-default.conf
And change the first line as
<VirtualHost *: 8079>
Now restart
sudo service apache2 restart
Apache will now listen on port 8079 and redirect to /var/www/html
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impr...
Pointer to class data member “::*”
...
Here's a real-world example I am working on right now, from signal processing / control systems:
Suppose you have some structure that represents the data you are collecting:
struct Sample {
time_t time;
double value1;
double value2;
double value3;
};
Now ...
What underlies this JavaScript idiom: var self = this?
...in event handlers (especially in closures).
Edit: Note that using self is now discouraged as window.self exists and has the potential to cause errors if you are not careful.
What you call the variable doesn't particularly matter. var that = this; is fine, but there's nothing magic about the name....