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Ruby, Difference between exec, system and %x() or Backticks
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system
The system method calls a system program. You have to provide the command as a string argument to this method. For example:
>> system("date")
Wed Sep 4 22:03:44 CEST 2013
=> true
The invoked program will use the current STDIN, STDOUT and STDERR objects of your Ruby prog...
Rails 4 image-path, image-url and asset-url no longer work in SCSS files
Are we supposed to use something else aside from image-url and others in Rails 4? They return different values that don't seem to make sense. If I have logo.png in /app/assets/images/logo.png and I do the following, this is what I get:
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Get underlying NSData from UIImage
...e data can be retrieved later with
let rawData = myImage.cgImage?.dataProvider?.data as Data?
However because the rawData is raw, it is going to be even larger than when using UIImagePNGRepresentation.
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How to find the length of a string in R
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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Get last dirname/filename in a file path argument in Bash
... unfortunately, if you wrap commands, basename is not a good idea. just something to keep in mind
– dtc
Jul 20 '16 at 20:36
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Visual Studio (2008) 'Clean Solution' Option
...answered Oct 21 '08 at 13:08
David ArnoDavid Arno
39.5k1515 gold badges7777 silver badges123123 bronze badges
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Regular expression for letters, numbers and - _
...s a different meaning (i.e. range). The . also has a different meaning outside character class definitions, but inside, it's just a literal .
References
regular-expressions.info/Anchors, Character Classes and Repetition
In PHP
Here's a snippet to show how you can use this pattern:
<?php
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Using reCAPTCHA on localhost
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Update
The original answer is no longer correct. The developer's guide now states:
"If you would like to use "localhost" for development, you must add it to the list of domains."
This will only work if you access localhost using 127.0.0.1/... rather than localhost/....
The original a...
Invoking a static method using reflection
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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How to extract a string using JavaScript Regex?
...iCalContent);
return arr[1];
}
You need these changes:
Put the * inside the parenthesis as
suggested above. Otherwise your matching
group will contain only one
character.
Get rid of the ^ and $. With the global option they match on start and end of the full string, rather than on start and e...