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What is the difference between 'my' and 'our' in Perl?
...e.
Declaring a variable with our allows you to predeclare variables in order to use them under use strict without getting typo warnings or compile-time errors. Since Perl 5.6, it has replaced the obsolete use vars, which was only file-scoped, and not lexically scoped as is our.
For example, the...
How to include jar files with java file and compile in command prompt
...the classpath as an environment variable.
The commands for Windows, Linux, etc are different.
You can find more details in this blog.
http://javarevisited.blogspot.com/2011/01/how-classpath-work-in-java.html
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How do I remove  from the beginning of a file?
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Three words for you:
Byte Order Mark (BOM)
That's the representation for the UTF-8 BOM in ISO-8859-1. You have to tell your editor to not use BOMs or use a different editor to strip them out.
To automatize the BOM's removal you can use awk as shown ...
Get keys from HashMap in Java
...ray.
The problem, of course, is that a set doesn't promise to keep your order. If you only have one item in your HashMap, you're good, but if you have more than that, it's best to loop over the map, as other answers have done.
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commands not found on zsh
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I don't have a ~/.zsh file. Instead I had to put it in /etc/zshrc.
– Chase Roberts
Jan 6 at 13:27
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Best GUI designer for eclipse? [closed]
...then WindowBuilder, to configure how variables are set up, event handlers, etc. I prefer to configure my variables to always be fields, and my event handlers to be "implement listener interface in parent class". Feels more like Visual Basic when I do that.
– Richard
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How to replace strings containing slashes with sed?
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add \ before special characters:
s/\?page=one&/page\/one\//g
etc.
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What does void* mean and how to use it?
...ss a void pointer to a function you will need to know what its type was in order to cast it back to that correct type later in the function to use it. You will see examples in pthreads that use functions with exactly the prototype in your example that are used as the thread function. You can then us...
How to access random item in list?
...fle<T>(this IEnumerable<T> source)
{
return source.OrderBy(x => Guid.NewGuid());
}
}
For a strongly typed list, this would allow you to write:
var strings = new List<string>();
var randomString = strings.PickRandom();
If all you have is an ArrayList, you can...
Styling HTML email for Gmail
...ing templates like those mentioned above from mailchimp, campaign monitor, etc. as they, as you have found, will not work in some email programs. This tool leaves your style section for the mail programs that will read it and puts all the styles inline to get more universal readability in the forma...