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What's the canonical way to check for type in Python?
...ation.
One more note: in this case, if you're using Python 2, you may actually want to use:
if isinstance(o, basestring):
because this will also catch Unicode strings (unicode is not a subclass of str; both str and unicode are subclasses of basestring). Note that basestring no longer exists in P...
Retrieve only the queried element in an object array in MongoDB collection
...r to filter an array during projection, which has the benefit of including all matches, instead of just the first one.
db.test.aggregate([
// Get just the docs that contain a shapes element where color is 'red'
{$match: {'shapes.color': 'red'}},
{$project: {
shapes: {$filter: {
...
Get a random item from a JavaScript array [duplicate]
... not a valid substitution for Math.floor. Using round would cause accidentally referencing an undefined index, say in the case Math.random() is 0.95 and items.length is 5. Math.round(0.95*5) is 5, which would be an invalid index. floor(random) will always be zero in your example.
...
How do I add a placeholder on a CharField in Django?
...
Look at the widgets documentation. Basically it would look like:
q = forms.CharField(label='search',
widget=forms.TextInput(attrs={'placeholder': 'Search'}))
More writing, yes, but the separation allows for better abstraction of more complic...
Equivalent C++ to Python generator pattern
...to signal termination
In your trivial example, it's easy enough. Conceptually:
struct State { unsigned i, j; };
State make();
void next(State&);
bool isDone(State const&);
Of course, we wrap this as a proper class:
class PairSequence:
// (implicit aliases)
public std::iterat...
Implementing MVC with Windows Forms
...s of usages of data binding / no usages of data binding
Most data being “table like” (e.g. invoices) that work well in standard grid controls / need custom controls for most of the UI data.
One developer / teams of 10 or 20 developers (just on the UI)
Lots of unit test using mocks etc / no unit ...
How can I rotate an HTML 90 degrees?
...
Just as a suggestion to all future readers: always place the prefixed rules before the standards definition. In this case, all browser-prefixed rules should be before the transform: rotate(90deg); rule. The reason would be that typically, you want t...
Need to remove href values when printing in Chrome
...
Warning: We had issues where a table sometimes lost the last few rows when printing. Turned out that this rule was the culprit, or at least removing it fixed the issue. Do not know why it had that effect.
– Henrik N
M...
Check if an array contains any element of another array in JavaScript
...like it at Ramda should always be used instead of vanilla imho. Better for all devs...
– Leon Gaban
Aug 15 '16 at 20:32
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Write a program to find 100 largest numbers out of an array of 1 billion numbers
...urce of the 1 billion numbers? If it is a database then 'select value from table order by value desc limit 100' would do the job quite nicely - there might be dialect differences.
Is this a one-off, or something that will be repeated? If repeated, how frequently? If it is a one-off and the data are...