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Check if EditText is empty. [closed]
I have 5 EditTexts in android for users to input. I would like to know if I could have a method for checking all the 5 EditTexts if they are null. Is there any way to do this??
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How does Rails keep track of which migrations have run for a database?
...runs a migration, it takes the leading digits in the migration's file name and inserts a row for that "version", indicating it has been run. If you roll back that migration, Rails will delete the corresponding row from schema_migrations.
For example, running a migration file named 20120620193144_cr...
What is a good pattern for using a Global Mutex in C#?
The Mutex class is very misunderstood, and Global mutexes even more so.
8 Answers
8
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How to synchronize a static variable among threads running different instances of a class in Java?
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The reason #3 is the best is that any random bit of code could synchronize on Test.class and potentially spoil your day. Also, class initialization runs with a lock on the class held, so if you've got crazy class initializers you can give yourself headaches. vol...
Using lambda expressions for event handlers
...der, EventArgs e)
{
//snip
MyButton.Click += new EventHandler(delegate (Object o, EventArgs a)
{
//snip
});
}
}
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Stop node.js program from command line
... Ctrl + C does not work for me. Only ^C gets typed into the console, and program does not exits.
– Eleeist
May 9 '12 at 19:21
1
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Creating a URL in the controller .NET MVC
...s "Default" (as it was when I created my project).
– Andy
Sep 23 '14 at 15:51
3
You don't need to...
Python Progress Bar
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I tried this code, and it threw a NameError: name 'xrange' is not defined error. Am I missing a module?
– Mushroom Man
May 18 '16 at 1:11
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Get Selected index of UITableView
...is useful for me to have access to long pathRow = [selectedIndexPath row]; and long pathSection = [selectedIndexPath section]; when you need specific selections (note that NSInteger is a typedef long which coming from a C background makes more sense since both need %ld anyway.
–...
how to configure apache server to talk to HTTPS backend server?
I configured apache server as a reverse proxy and it works fine if I point a backend server as HTTP. That is:
2 Answers
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