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typeof !== “undefined” vs. != null
I often see JavaScript code which checks for undefined parameters etc. this way:
11 Answers
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SQL - Query to get server's IP address
...p varchar(40)
exec sp_get_ip_address @ip out
print @ip
Source of the SQL script.
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Stashing only staged changes in git - is it possible?
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I made a script that stashes only what is currently staged and leaves everything else. This is awesome when I start making too many unrelated changes. Simply stage what isn't related to the desired commit and stash just that.
(Than...
How can I shift-select multiple checkboxes like GMail?
...email list, hold down the Shift key, and select a second checkbox. The JavaScript will then select/unselect the checkboxes that are between the two checboxes.
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About catching ANY exception
...ht and swallowed those then you could make it hard for anyone to exit your script.
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Create subdomains on the fly with .htaccess (PHP)
...Host>
3. Work out which subdomain you are on in PHP
Then in your PHP scripts you can find out the domain by looking in the $_SERVER super global variable. Here is an example of grabbing the subdomain in PHP:
preg_match('/([^.]+)\.example\.org/', $_SERVER['SERVER_NAME'], $matches);
if(isset($m...
How to load all modules in a folder?
...o a directory with no further configuration and have them be executed by a script running somewhere else.
– Evan Fosmark
Jun 30 '09 at 1:29
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Rails 4: how to use $(document).ready() with turbo-links
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Here's what I do...
CoffeeScript:
ready = ->
...your coffeescript goes here...
$(document).ready(ready)
$(document).on('page:load', ready)
last line listens for page load which is what turbo links will trigger.
Edit...adding Javascript vers...
Maven: How to include jars, which are not available in reps into a J2EE project?
...-install-plugin to install a file to the local repository. If you create a script with a Maven invocation for each file and keep it alongside the jars, you (and anyone else with access) can easily install the jars (and associated pom files) to their local repository.
For example:
mvn install:insta...
SQL Server: Maximum character length of object names
...xplained here.
And the verification can be easily made with the following script contained in the blog post before:
DECLARE @i NVARCHAR(800)
SELECT @i = REPLICATE('A', 116)
SELECT @i = 'CREATE TABLE #'+@i+'(i int)'
PRINT @i
EXEC(@i)
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