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What do (lambda) function closures capture?
...estion: You could use partial in the functools module.
With importing add from operator as Chris Lutz proposed the example becomes:
from functools import partial
from operator import add # add(a, b) -- Same as a + b.
adders = [0,1,2,3]
for i in [0,1,2,3]:
# store callable object with first ...
Python dictionary: Get list of values for list of keys
...t, mykeys)
Alternatively, using operator.itemgetter can return a tuple:
from operator import itemgetter
myvalues = itemgetter(*mykeys)(mydict)
# use `list(...)` if list is required
Note: in Python3, map returns an iterator rather than a list. Use list(map(...)) for a list.
...
Android - Pulling SQlite database android device
...dst = new FileOutputStream(backupDB).getChannel();
dst.transferFrom(src, 0, src.size());
src.close();
dst.close();
}
}
} catch (Exception e) {
}
Don't forget to set the permission to write on SD in your manifest, like below.
<uses-permission and...
How do HashTables deal with collisions?
...tries
Incremental resizing
Monotonic keys
EDIT: the above are borrowed from wiki_hash_table, where you should go to have a look to get more info.
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How can i tell if an object has a key value observer attached
...lly, expect the observer's state to go stale as it doesn't receive updates from the formerly-observed object.
If you're doing this in the observing object's class, simply remember which objects you're observing (or, if you only ever observe one object, whether you're observing it). This is assuming...
When should I use “this” in a class?
...od of another object. The third is as a way to call alternate constructors from within a constructor.
Case 1: Using this to disambiguate variable references. In Java setter methods, we commonly pass in an argument with the same name as the private member variable we are attempting to set. We then a...
How to convert SecureString to System.String?
...e length stored in the BSTR will be a copy of the length already available from SecureString.Length.
– Ben Voigt
Nov 8 '19 at 15:27
...
How to replace strings containing slashes with sed?
...se any punctuation, not only slashes. A common alternative is s@foo@bar@, from which it becomes obvious how to solve your problem.
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Check if at least two out of three booleans are true
...e a&&b || b&&c || a&&c version wins then.
Results from Tofubeer with the latest code running OS X:
a&&b || b&&c || a&&c : 1358 ms
a ? b||c : b&&c : 1187 ms
a&b | b&c | c&a : 410 ms
a + b + c >= 2 : 602 ms
...
How to “log in” to a website using Python's Requests module?
...est to the login url with your login details as a payload. Making requests from a session instance is essentially the same as using requests normally, it simply adds persistence, allowing you to store and use cookies etc.
Assuming your login attempt was successful, you can simply use the session in...