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Verifying that a string contains only letters in C#
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Only letters:
Regex.IsMatch(input, @"^[a-zA-Z]+$");
Only letters and numbers:
Regex.IsMatch(input, @"^[a-zA-Z0-9]+$");
Only letters, numbers and underscore:
Regex.IsMatch(input, @"^[a-zA-Z0-9_]+$");
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How to activate virtualenv?
...g a folder and cd'ing into it:
$ virtualenv venv --distribute
New python executable in venv/bin/python
Installing distribute.........done.
Installing pip................done.
$ source venv/bin/activate
(venv)$ python
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File Explorer in Android Studio
Can anyone tell where the file explorer is located in Android Studio?
18 Answers
18
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How can I check if a view is visible or not in Android? [duplicate]
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Would you mind explaining why this works? I've looked at source code for View.getLocalVisibleRect and I am not sure of how it works.
– yarian
Sep 18 '12 at 20:32
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How to get UILabel to respond to tap?
I have discovered that I can create UILabel much faster than UITextField and I plan to use UILabel most of the time for my data display app.
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LINQ - Full Outer Join
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Union will eliminate duplicates. If you are not expecting duplicates, or can write the second query to exclude anything that was included in the first, use Concat instead. This is the SQL difference between UNION and UNION ALL
– cadrell0
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What does “export” do in shell programming? [duplicate]
...ell, variable assignment is the same whether it is or is not preceded by "export". What's it for?
3 Answers
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How to install lxml on Ubuntu
I'm having difficulty installing lxml with easy_install on Ubuntu 11.
11 Answers
11
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Get Value of a Edit Text field
I am learning how to create UI elements. I have created a few EditText input fields. On the click of a Button I want to capture the content typed into that input field.
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