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Compare a string using sh shell
...shell and I am trying to compare a string with a variable's value but the if condition is always execute to true. Why?
7 ...
Database: To delete or not to delete records
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It definitely depends on the actual content of your database. If you're using it to store session information, then by all means wipe it immediately when the session expires (or is closed), you don't want that garbage lying around. As it cannot really be used again for any practical pur...
Best way to add page specific JavaScript in a Rails 3 app?
...lock and then yield to that block in your application layout. For example
If it's pretty short then:
<% content_for :head do %>
<script type="text/javascript">
$(function() {
$('user_rating_positve').click(function() {
$('some_div').show();
}
});
</sc...
Updating packages in Emacs
I have the following setup for packages (not sure if there is a better recommended one):
4 Answers
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How to check if a value exists in a dictionary (python)
... in case you wonder why... the reason is that each of the above returns a different type of object, which may or may not be well suited for lookup operations:
>>> type(d.viewvalues())
<type 'dict_values'>
>>> type(d.values())
<type 'list'>
>>> type(d.itervalue...
How do I convert uint to int in C#?
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Given:
uint n = 3;
int i = checked((int)n); //throws OverflowException if n > Int32.MaxValue
int i = unchecked((int)n); //converts the bits only
//i will be negative if n > Int32.MaxValue
int i = (int)n; //same behavior as unchecked
or
int i = Convert.ToInt3...
What is a pre-revprop-change hook in SVN, and how do I create it?
...Basically it's a script that is launched before unversioned property is modified on the repository, so that you can manage more precisely what's happening on your repository.
There are templates in the SVN distrib for different hooks, located in the /hooks subdirectory (*.tmpl that you have to edit...
Traverse all the Nodes of a JSON Object Tree with JavaScript
...a JSON object tree, but cannot find any library for that. It doesn't seem difficult but it feels like reinventing the wheel.
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Which Visual C++ file types should be committed to version control?
...state: build helper
lib: build result. Can be 3rd party
log: build log
manifest: build helper. Can be written yourself.
obj: build helper
pch: build helper
pdb: build result
res: build helper
sdf: intellisense dbase
suo: solution user options
tlog: build log
user: debug settings. Do preserve if j...
How to remove all null elements from a ArrayList or String Array?
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As of 2015, this is the best way (Java 8):
tourists.removeIf(Objects::isNull);
Note: This code will throw java.lang.UnsupportedOperationException for fixed-size lists (such as created with Arrays.asList), including immutable lists.
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