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How to put a line comment for a multi-line command [duplicate]
I know how to write a multi-line command in a Bash script, but how can I add a comment for each line in a multiline command?
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How do I convert NSMutableArray to NSArray?
...ons. For example sending copy to a immutable array only retains the object and returns self.
If you don't use garbage collection or ARC remember that -copy retains the object.
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Test if a property is available on a dynamic variable
...trying to access it, unless you re-implemented the way dynamic binding is handled in the C# compiler. Which would probably include a lot of guessing, because it is implementation-defined, according to the C# specification.
So you should actually try to access the member and catch an exception, if i...
Regex select all text between tags
...<pre>(.*?)</pre>", (replacing pre with whatever text you want) and extract the first group (for more specific instructions specify a language) but this assumes the simplistic notion that you have very simple and valid HTML.
As other commenters have suggested, if you're doing something c...
mkdir's “-p” option
...oes in Unix. I used it for a lab assignment while creating a subdirectory and then another subdirectory within that one. It looked like this:
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How to get year/month/day from a date object?
...ar();
newdate = year + "/" + month + "/" + day;
or you can set new date and give the above values
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Generating an MD5 checksum of a file
Is there any simple way of generating (and checking) MD5 checksums of a list of files in Python? (I have a small program I'm working on, and I'd like to confirm the checksums of the files).
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Remove CSS class from element with JavaScript (no jQuery) [duplicate]
...cript only?
Please do not give me an answer with jQuery as I can't use it, and I don't know anything about it.
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When to use a “has_many :through” relation in Rails?
I am trying to understand what has_many :through is and when to use it (and how). However, I am not getting it. I am reading Beginning Rails 3 and I tried Googling, but I am not able to understand.
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How do I get the calling method name and type using reflection? [duplicate]
I'd like to write a method which obtains the name of the calling method, and the name of the class containing the calling method.
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