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Access Enum value using EL with JSTL
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edited May 7 '14 at 11:04
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How do I drop a foreign key constraint only if it exists in sql server?
I can drop a table if it exists using the following code but do not know how to do the same with a constraint:
10 Answers
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Characters allowed in a URL
Does anyone know the full list of characters that can be used within a GET without being encoded? At the moment I am using A-Z a-z and 0-9... but I am looking to find out the full list.
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Popstate on page's load in Chrome
...d use history.pushState() in order to update the browser's location bar without page reload. Then, of course, I use window.popstate in order to restore previous state when back-button is clicked.
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Use C++ with Cocoa Instead of Objective-C?
I would like to write applications that use C++ and the Cocoa frameworks because Apple is not making Carbon 64-bit capable. C++ seems to be pretty vanilla in its implementation on Linux and Windows but on Mac OS X it seems like additional Apple specific pieces of code are required (like an Obj-C wra...
Python: List vs Dict for look up table
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Lookups in lists are O(n), lookups in dictionaries are amortized O(1), with regard to the number of items in the data structure. If you don't need to associate values, use sets.
Memory
Both dictionaries and sets use hashing and they use much more memory than only for object storage. According t...
Find merge commit which include a specific commit
...ranch feature is still available.
In that case h is the last result of:
git log master ^feature --ancestry-path
If the branch feature is not available anymore, you can show the merge commits in the history line between c and master:
git log <SHA-1_for_c>..master --ancestry-path --merges...
pandas: How do I split text in a column into multiple rows?
I'm working with a large csv file and the next to last column has a string of text that I want to split by a specific delimiter. I was wondering if there is a simple way to do this using pandas or python?
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How to validate an email address in PHP
...r_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
}
Additionally you can check whether the domain defines an MX record:
if (!checkdnsrr($domain, 'MX')) {
// domain is not valid
}
But this still doesn't guarantee that the mail exists. The only way to find that out is by sen...
How to make an anchor tag refer to nothing?
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If you don't want to have it point to anything, you probably shouldn't be using the <a> (anchor) tag.
If you want something to look like a link but not act like a link, it's best to use the appropriate element (such as <span>) and then st...