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How can I install a local gem?
...rch the current directory first, so if your .gem file is there, it will pick it up. I found it on the gem reference, which you may find handy as well:
gem install will install the named
gem. It will attempt a local
installation (i.e. a .gem file in the
current directory), and if that fails...
Command to get time in milliseconds
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Peter Mortensen
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answered May 14 '13 at 17:00
AlperAlper
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Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
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PHP: How to use array_filter() to filter array keys?
The callback function in array_filter() only passes in the array's values, not the keys.
14 Answers
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How do you create a Distinct query in HQL
...e a way to create a Distinct query in HQL. Either by using the "distinct" keyword or some other method. I am not sure if distinct is a valid keywork for HQL, but I am looking for the HQL equivalent of the SQL keyword "distinct".
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Where can I learn jQuery? Is it worth it?
...ces learning about web development on w3schools.com . It's hit or miss, I know, but the PHP and CSS sections specifically have proven very useful for reference.
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Removing multiple files from a Git repo that have already been deleted from disk
... deleted four files from using rm ( not git rm ), and my Git status looks like this:
29 Answers
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High Quality Image Scaling Library [closed]
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Here's a nicely commented Image Manipulation helper class that you can look at and use. I wrote it as an example of how to perform certain image manipulation tasks in C#. You'll be interested in the ResizeImage function that takes a System.Drawing.Image, the width and the height as the arguments....
What does 'foo' really mean?
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See: RFC 3092: Etymology of "Foo", D. Eastlake 3rd et al.
Quoting only the relevant definitions from that RFC for brevity:
Used very generally as a sample name for absolutely anything, esp.
programs and files (esp. scratch files).
First on the standard li...
How to simulate the environment cron executes a script with?
...ts as they normally don't have my environment setup. Is there a way to invoke bash(?) in the same way cron does so I could test scripts before installing them?
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