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What is a elegant way in Ruby to tell if a variable is a Hash or an Array?
...ve is true if @some_var is an instance of a hash or other class that stems from Object. So, if you want a strict match on the class type, using the == or instance_of? method is probably what you're looking for.
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htaccess Access-Control-Allow-Origin
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from my experience;
if it doesn't work from within php do this in .htaccess it worked for me
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin http://www.vknyvz.com
Header set Access-Control-Al...
How to check whether a script is running under Node.js?
I have a script I am requiring from a Node.js script, which I want to keep JavaScript engine independent.
20 Answers
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How do I send a file as an email attachment using Linux command line?
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Nathan, it looks like your quote from David is wrong - he used the mutt command, not mail. Also as others have pointed out, mutt now seems to require a -- argument before the address. And I see that @exhuma and I actually agree on what the -a option in mai...
How to get a resource id with a known resource name?
...in 0 - 1 ms! So it's not slow, it's super fast! I'm using it to get images from resources and it works perfectly. Tested on Nexus5x.
– Kirill Karmazin
Apr 25 '17 at 21:16
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How can I split a string into segments of n characters?
... This is technically the better answer as it will grab all the text from a string that's not evenly divisible by 3 (it will grab the last 2 or 1 characters).
– Erik
Jun 7 '11 at 0:36
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Is there a way that I can check if a data attribute exists?
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In the interest of providing a different answer from the ones above; you could check it with Object.hasOwnProperty(...) like this:
if( $("#dataTable").data().hasOwnProperty("timer") ){
// the data-time property exists, now do you business! .....
}
alternatively, ...
Does every Core Data Relationship have to have an Inverse?
...odeled it as follows:
Note you have a to-one relationship called "type", from SocialApp to SocialAppType. The relationship is non-optional and has a "deny" delete rule.
Now consider the following:
SocialApp *socialApp;
SocialAppType *appType;
// assume entity instances correctly instantiated
[s...
eval command in Bash and its typical uses
.... in a separate process that inherits all settings such as variable values from the current shell), and gathers its output. So echo $($n) runs $n as a shell command, and displays its output. Since $n evaluates to 1, $($n) attempts to run the command 1, which does not exist.
eval echo \${$n} runs th...
Centering a background image, using CSS
...m, or make a temporary example at www.jsfiddle.net and post a link for us. From what you've said, the image is 1600x1200 and most screen resolutions don't go that high, try resizing your image to fit. I use a widescreen monitor at 1440x900 for example.
– Kyle
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