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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
In Rails we can do the following in case a value doesn't exist to avoid an error:
12 Answers
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Django - “no module named django.core.management”
I get the following error when trying to run Django from the command line.
21 Answers
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What are all codecs and formats supported by FFmpeg?
... That would only be a list of formats supported by a specific build/installation of FFmpeg. There are a very wide range of FFmpeg builds in use.
– mikerobi
Oct 5 '11 at 19:02
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Flat file databases [closed]
...lename;
if(!$this->put($file, $content)) {
trigger_error(get_class($this) . " error: Couldn't write to $file", E_USER_WARNING);
return false;
}
return true;
}
/**
* Saves data to file
*
* @since 1.0
* @uses $directory
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How to dynamically update a ListView on Android [closed]
...ing? This code is copied w/o a test compile, so I likely left at least one error in there somewhere
– Hamy
Feb 8 '10 at 15:23
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what is reverse() in Django
...!-- django <= 1.4 -->
<a href="{% url url_name %}">link which calls some_view</a>
<!-- django >= 1.5 or with {% load url from future %} in your template -->
<a href="{% url 'url_name' %}">link which calls some_view</a>
This will be rendered as:
<a href="...
How to allow only numeric (0-9) in HTML inputbox using jQuery?
...am creating a web page where I have an input text field in which I want to allow only numeric characters like (0,1,2,3,4,5...9) 0-9.
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isset() and empty() - what to use
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Just check whether it is empty, php won't throw an error if this is not the case.
– Pez Cuckow
Aug 25 '11 at 13:59
3
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What's the state of the art in email validation for Rails?
...you're going to send an email. If the email fails, you're going to get an error message. At which point you can tell the user "Sorry, your friend didn't receive that, would you like to try again?" or flag it for manual review, or just ignore it, or whatever.
These are the same options you'd have ...
Is “inline” without “static” or “extern” ever useful in C99?
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> I get a linker error (undefined reference to f)
Works here: Linux x86-64, GCC 4.1.2. May be a bug in your compiler; I don't see anything in the cited paragraph from the standard that forbids the given program. Note the use of if rather tha...