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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...t, I'll use [ ! "$var" ] instead of [ -z "$var" ].
– AllenHalsey
Oct 6 '10 at 20:32
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Authentication versus Authorization
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Authentication is the process of ascertaining that somebody really is who they claim to be.
Authorization refers to rules that determine who is allowed to do what. E.g. Adam may be authorized to create and delete databases,
while Usama is only authorised to read.
The two concep...
How to Set AllowOverride all
I want to set the AllowOverride all But I don't know how to do it. I have found the following code by searching the google and pasted it in .htaccess :
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How to disable the warning 'define' is not defined using JSHint and RequireJS
...he party, but use this option in your jshintrc:
"dojo": true
and thou shall rest peacefully without red warnings...
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Retrieve version from maven pom.xml in code
... to retrieve version number from maven's pom.xml in code, i.e., programatically?
11 Answers
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Polymorphism vs Overriding vs Overloading
...xample when teaching a class. The canonical "Bank Account" class didn't really express the "abstractness" of the base class. The other canonical example (Animal, make noise) was too abstract for understanding. I was looking for a single base with too obvious subclasses. Actually, goPee() was the...
How to debug in Django, the good way? [closed]
... later Django . The first times it was hard looking at tracebacks and actually figure out what I did wrong and where the syntax error was. Some time has passed now and some way along the way, I guess I got a routine in debugging my Django code. As this was done early in my coding experience, I sat ...
Preventing referenced assembly PDB and XML files copied to output
...You can also specify this via the command line:
MsBuild.exe build.file /p:AllowedReferenceRelatedFileExtensions=none
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error, string or binary data would be truncated when trying to insert
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Some of your data cannot fit into your database column (small). It is not easy to find what is wrong. If you use C# and Linq2Sql, you can list the field which would be truncated:
First create helper class:
public class SqlTruncationExceptionWithDetails : ArgumentOutOfRangeExceptio...
Career day in kindergarten: how to demonstrate programming in 20 minutes? [closed]
...a lot of paper towels on a table, and got out a loaf of (cheap) bread, a small tub of butter, a small jar of jelly, and a plastic butter knife.
I said to the kids, "How many of you think computers are smart?" Most of them raised their hands. I said, "Computers are really dumb. People are smart. ...