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What's the difference between VARCHAR and CHAR?
...d length.
If your content is a fixed size, you'll get better performance with CHAR.
See the MySQL page on CHAR and VARCHAR Types for a detailed explanation (be sure to also read the comments).
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Android Calling JavaScript functions in WebView
I am trying to call some javascript functions sitting in an html page running inside an android webview . Pretty simple what the code tries to do below - from the android app, call a javascript function with a test message, which inturn calls a java function back in the android app that disp...
What do I need to read to understand how git works? [closed]
I would like to understand the way git works from a architects point of view. How are files stored, how are versions kept and how do changes happen (branches, merges, etc.)?
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Auto select file in Solution Explorer from its open tab
...y working on a project. Many times, I find myself right-clicking on a tab title and searching for Show/Select/Scroll-to this file in Solution Explorer , and I can't find it.
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How do I get a file's directory using the File object?
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In either case, I'd expect file.getParent() (or file.getParentFile()) to give you what you want.
Additionally, if you want to find out whether the original File does exist and is a directory, then exists() and isDirectory() are ...
How do I generate a constructor from class fields using Visual Studio (and/or ReSharper)?
... the Java IDEs ( Eclipse , NetBeans , and IntelliJ IDEA ) providing you with a command to generate a default constructor for a class based on the fields in the class.
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Retrieving Property name from lambda expression
...Here's a method that'll return the PropertyInfo object for the expression. It throws an exception if the expression is not a property.
public PropertyInfo GetPropertyInfo<TSource, TProperty>(
TSource source,
Expression<Func<TSource, TProperty>> propertyLambda)
{
Type t...
Convert special characters to HTML in Javascript
...ans "global". Simply put, all occurrences of the string will be replaced. Without /g only the first match would be replaced.
– Kevin G.
Jul 21 '16 at 11:42
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Command to get nth line of STDOUT
... -l | sed -n 2p
Using this alternative, which looks more efficient since it stops reading the input when the required line is printed, may generate a SIGPIPE in the feeding process, which may in turn generate an unwanted error message:
ls -l | sed -n -e '2{p;q}'
I've seen that often enough that...
Why do Java webapps use .do extension? Where did it come from?
...knowledge, this convention has been spread by Struts1. The user guide puts it like this:
5.4.2 Configure the ActionServlet Mapping
Note: The material in this section is not specific to Struts. The
configuration of servlet mappings is
defined in the Java Servlet
Specification. This se...