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Why I can't change directories using “cd”?
...one within the script's shell. When the script ends, that shell exits, and then you are left in the directory you were. "Source" the script, don't run it. Instead of:
./myscript.sh
do
. ./myscript.sh
(Notice the dot and space before the script name.)
...
How to ISO 8601 format a Date with Timezone Offset in JavaScript?
Goal: Find the local time and UTC time offset then construct the URL in following format.
10 Answers
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Setting Environment Variables for Node to retrieve
...ghly recommend be ignored from your git/mercurial/etc):
FOO=bar
BAZ=bob
Then in your application entry file put the following line in as early as possible:
require('dotenv').config();
Boom. Done. 'process.env' will now contain the variables above:
console.log(process.env.FOO);
// bar
The '...
Why is “using namespace std;” considered bad practice?
... parameters happen to match.
If you had used foo::Blah() and bar::Quux(), then the introduction of foo::Quux() would have been a non-event.
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How to allow remote connection to mysql
...'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
FLUSH PRIVILEGES;
And then find the following line and comment it out in your my.cnf file, which usually lives on /etc/mysql/my.cnf on Unix/OSX systems. In some cases the location for the file is /etc/mysql/mysql.conf.d/mysqld.cnf).
If it's a Win...
Error “can't use subversion command line client : svn” when opening android project checked out from
...ing TortoiseSVN client (can't manage to do it from within Android Studio), then get this error message after importing the project to Android Studio:
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How to create a self-signed certificate for a domain name for development?
...Root -sr LocalMachine
-sky exchange -m 120 -a sha1 -len 2048 -r
You can then create a certificate bound to your subdomain and signed by your new authority:
(Note that the the value of the -in parameter must be the same as the CN value used to generate your authority above.)
makecert.exe -n "CN=...
What is the purpose of the var keyword and when should I use it (or omit it)?
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If you're in the global scope then there's not much difference. Read Kangax's answer for explanation
If you're in a function then var will create a local variable, "no var" will look up the scope chain until it finds the variable or hits the global scope...
Android WebView: handling orientation changes
...InstanceState(Bundle outState) {
webView.saveState(outState);
}
Then recover this in your onCreate after the webview has been re-inflated of course:
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.blah);
if (sav...
Configure apache to listen on port other than 80
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In /etc/apache2/ports.conf, change the port as
Listen 8079
Then go to /etc/apache2/sites-enabled/000-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/htm...