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How to initialize a dict with keys from a list and empty value in Python?
...Moreover, defaultdict is a subclass of dict, so there's usually no need to convert back to a regular dictionary.
For workflows where you require controls on permissible keys, you can use dict.fromkeys as per the accepted answer:
d = dict.fromkeys([1, 2, 3, 4])
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Change URL parameters
...ryString.parse(location.search);
// set the `row` property
q.rows = 10;
// convert the object to a query string
// and overwrite the existing query string
location.search = queryString.stringify(q);
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Add Variables to Tuple
...
Another tactic not yet mentioned is using appending to a list, and then converting the list to a tuple at the end:
mylist = []
for x in range(5):
mylist.append(x)
mytuple = tuple(mylist)
print mytuple
returns
(0, 1, 2, 3, 4)
I sometimes use this when I have to pass a tuple as a function...
What is the advantage of using forwarding references in range-based for loops?
...dvantage I can see is when the sequence iterator returns a proxy reference and you need to operate on that reference in a non-const way. For example consider:
#include <vector>
int main()
{
std::vector<bool> v(10);
for (auto& e : v)
e = true;
}
This doesn't compi...
how to reference a YAML “setting” from elsewhere in the same YAML file?
...n can have any number of elements of any data type, as long as they can be converted to string, so !join [*a, "/", *b, "/", *c] does what you would expect.
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Remove characters except digits from string using Python?
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convert str to list to make sure it works on both py2 and py3: ''.join(filter(lambda x: x.isdigit(), list("dasdasd2313dsa")))
– Luiz C.
Feb 9 '17 at 18:25
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SharedPreferences.onSharedPreferenceChangeListener not being called consistently
...eView. And that was because I listened to the Android Studio telling me to convert the listener to a local variable.
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Isn't “package private” member access synonymous with the default (no-modifier) access?
...ion uses, along with the usage of "default access." Aren't package-private and default access both synonymous with protected?
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C# DateTime to “YYYYMMDDHHMMSS” format
I want to convert a C# DateTime to "YYYYMMDDHHMMSS" format. But I don't find a built in method to get this format? Any comments?
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Start a git commit message with a hashmark (#)
... smart enough to recognize '#' as the comment char in custom templates and convert it if the final comment char is different.
It thinks '#' lines in custom templates as part of the commit message. So don't use this with custom templates.
The list of candidate characters for "auto" are:
# ; @ ! $ % ...