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How do I check what version of Python is running my script?
...as you like. Note however, that it is almost always better to "duck" check if a certain feature is there, and if not, workaround (or bail out). Sometimes features go away in newer releases, being replaced by others.
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Selecting data frame rows based on partial string match in a column
...g in a column, e.g. column 'x' contains the string "hsa". Using sqldf - if it had a like syntax - I would do something like:
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Some built-in to pad a list in python
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a += [''] * (N - len(a))
or if you don't want to change a in place
new_a = a + [''] * (N - len(a))
you can always create a subclass of list and call the method whatever you please
class MyList(list):
def ljust(self, n, fillvalue=''):
ret...
mongoDB/mongoose: unique if not null
I was wondering if there is way to force a unique collection entry but only if entry is not null .
e
Sample schema:
4 Answ...
How do I use InputFilter to limit characters in an EditText in Android?
...rt, int dend) {
for (int i = start; i < end; i++) {
if (!Character.isLetterOrDigit(source.charAt(i))) {
return "";
}
}
return null;
}
};
edit.setFilters(new InputFilter[] { filter });
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SQL update trigger only when column is modified
...t it doesn't seem to work as I would like: I want it to only update the modified information if the QtyToRepair value has been updated... but it doesn't do that.
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Append values to a set in Python
...p.update(yoursequenceofvalues)
e.g, keep.update(xrange(11)) for your specific example. Or, if you have to produce the values in a loop for some other reason,
for ...whatever...:
onemorevalue = ...whatever...
keep.add(onemorevalue)
But, of course, doing it in bulk with a single .update call...
What does collation mean?
...ir accents and other features, collation changes. For example, though the different accented forms of a may exist at disparate code points, they may all need to be sorted as if they were the same letter.
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How do I map lists of nested objects with Dapper
...our courses populating with the locations.
Caveat the in trick will work if you have less than 2100 lookups (Sql Server), if you have more you probably want to amend the query to select * from CourseLocations where CourseId in (select Id from Courses ... ) if that is the case you may as well yank ...
Numpy: find first index of value fast
...e reference:
Using numba (1) is the easiest way until numpy implements it. If you use anaconda python distribution it should already be installed.
The code will be compiled so it will be fast.
@jit(nopython=True)
def find_first(item, vec):
"""return the index of the first occurence of item in v...