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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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Does Python have a string 'contains' substring method?
...follow
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edited Nov 11 '15 at 23:30
answered Aug 9 '10 at 2:56
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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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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...
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...
Elastic Search: how to see the indexed data
I had a problem with ElasticSearch and Rails, where some data was not indexed properly because of attr_protected. Where does Elastic Search store the indexed data? It would be useful to check if the actual indexed data is wrong.
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Resizing SVG in html?
...VG file in HTML, and one of the things I've heard about the format is that it doesn't get all pixelated when you zoom in on it.
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Shell script - remove first and last quote (") from a variable
Below is the snippet of a shell script from a larger script. It removes the quotes from the string that is held by a variable. I am doing it using sed, but is it efficient? If not, then what is the efficient way?
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