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Removing multiple keys from a dictionary safely
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Why not like this:
entries = ('a', 'b', 'c')
the_dict = {'b': 'foo'}
def entries_to_remove(entries, the_dict):
for key in entries:
if key in the_dict:
del the_dict[key]
A more compact version was provided by mattbornski using dict.pop()
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Django queries - id vs pk
...ry key field i.e. you don't need to care whether the primary key field is called id or object_id or whatever.
It also provides more consistency if you have models with different primary key fields.
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How do I tidy up an HTML file's indentation in VI?
How do I fix the indentation of his huge html files which was all messed up?
11 Answers
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How can I find where I will be redirected using cURL?
...topt($ch, CURLOPT_FOLLOWLOCATION, true);
Erm... I don't think you're actually executing the curl... Try:
curl_exec($ch);
...after setting the options, and before the curl_getinfo() call.
EDIT: If you just want to find out where a page redirects to, I'd use the advice here, and just use Curl to ...
My Git repository is in the wrong root directory. Can I move it? (../ instead of ./)
...ave behind a lot of "moved this file here" history entries that aren't actually changes, but you fixing a screwup at creation time. Better to just create it right.
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How to avoid the “Circular view path” exception with Spring MVC test
... the View.
The JstlView class extends InternalResourceView which is
Wrapper for a JSP or other resource within the same web application.
Exposes model objects as request attributes and forwards the request
to the specified resource URL using a javax.servlet.RequestDispatcher.
A URL for...
PHP Get Site URL Protocol - http vs https
...olutions are quite messy; this is how I would do it:
$protocol = stripos($_SERVER['SERVER_PROTOCOL'],'https') === 0 ? 'https://' : 'http://';
...or even without condition if you prefer:
$protocol = strtolower(substr($_SERVER["SERVER_PROTOCOL"],0,strpos( $_SERVER["SERVER_PROTOCOL"],'/'))).'://';
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Remove by _id in MongoDB console
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Very close. This will work:
db.test_users.deleteOne( {"_id": ObjectId("4d512b45cc9374271b02ec4f")});
i.e. you don't need a new for the ObjectId.
Also, note that in some drivers/tools, remove() is now deprecated and deleteOne or deleteMany should be used ins...
Adding a parameter to the URL with JavaScript
In a web application that makes use of AJAX calls, I need to submit a request but add a parameter to the end of the URL, for example:
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Show pending migrations in rails
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This command will list all migrations with their status (UP or DOWN)
Rails 3 and 4
rake db:migrate:status
Rails 5
rake db:migrate:status
# Or
rails db:migrate:status
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