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Rails - Could not find a JavaScript runtime?
...
Installing a javascript runtime library such as nodejs solves this
To install nodejs on ubuntu, you can type the following command in the terminal:
sudo apt-get install nodejs
To install nodejs on systems using yum, type the fol...
Restarting cron after changing crontab file?
... the cron man page:
...cron will then examine the modification time on all crontabs
and reload those which have changed. Thus cron need not be restarted
whenever a crontab file is modified
But if you just want to make sure its done anyway,
sudo service cron reload
or
/etc/init.d...
How do I convert a NSString into a std::string?
...ou don't want non-ASCII characters in there, you can use dataUsingEncoding:allowLossyConversion: to get an NSData representation of the string with lossy encoded ASCII content, and then throw that at your std::string
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Case in Select Statement
...imple CASE expression
Within a SELECT statement, a simple CASE expression allows for only an equality check; no other comparisons are made. The following example uses the CASE expression to change the display of product line categories to make them more understandable.
USE AdventureWorks2012;
GO
S...
What is the difference between a route and resource in New Router API?
... a brand new
namespace. That namespace is named after the
resource and all of the child routes will be inserted into it.
Update: more complex example with nested resources
Consider the following more complex example with multiple nested resources:
App.Router.map(function() {
this.resource(...
Help with C# generics error - “The type 'T' must be a non-nullable value type”
...nt required by Nullable<T> itself. In other words, you could try to call:
CoalesceMax<string>(...)
which wouldn't make sense, as Nullable<string> isn't valid.
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improve th...
Bash, no-arguments warning, and case decisions
... You mean the errors coming out of a particular program you're calling? You can put > /dev/null and/or 2> /dev/null after that to send its standard output and/or standard error streams into oblivion.
– Thomas
Mar 11 '10 at 20:14
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What is token-based authentication?
... general concept behind a
token-based authentication system is
simple. Allow users to enter their
username and password in order to
obtain a token which allows them to
fetch a specific resource - without
using their username and password.
Once their token has been obtained,
the user ...
Undo svn add without reverting local edits
I accidentally ran svn add * and added a bunch of files that shouldn't be in the repository. I also have local edits in some files that I want to keep. Is there a simple way to just undo the svn add without reverting the local edits? The main suggestion I see on Google is svn revert , which sup...
How to use @Nullable and @Nonnull annotations more effectively?
...guess these annotations are only useful for your IDE to warn you of potentially null pointer errors.
As said in the "Clean Code" book, you should check your public method's parameters and also avoid checking invariants.
Another good tip is never returning null values, but using Null Object Pattern...