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Does pandas iterrows have performance issues?
...ernally by pandas, though it depends on what is going on inside the apply expression. For example, df.apply(lambda x: np.sum(x)) will be executed pretty swiftly, though of course, df.sum(1) is even better. However something like df.apply(lambda x: x['b'] + 1) will be executed in Python space, and co...
Getting attributes of Enum's value
... to get attributes of the enum values and not of the enum itself? For example, suppose I have the following enum :
24 ...
Difference between “or” and || in Ruby? [duplicate]
...
Here's a ruby operator precedence table.
See this question for another example using and/&&.
Also, be aware of some nasty things that could happen:
a = false || true #=> true
a #=> true
a = false or true #=> true
a #=> false
Both of the previous two statements evalua...
TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes
Per the MySQL docs , there are four TEXT types:
4 Answers
4
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How to change identity column values programmatically?
...following structure
CREATE TABLE Test
(
ID INT IDENTITY(1,1) PRIMARY KEY,
X VARCHAR(10)
)
INSERT INTO Test
OUTPUT INSERTED.*
SELECT 'Foo' UNION ALL
SELECT 'Bar' UNION ALL
SELECT 'Baz'
Then you can do
/*Define table with same structure but no IDENTITY*/
CREATE TABLE Temp
(
ID INT PRIMARY KEY,
X...
Hide keyboard when scroll UITableView
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For those who forgets, you still needs to make UITextfield resign first responder.
– skyline75489
Dec 23 '15 at 4:04
1
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Create nice column output in python
..., 'c'], ['aaaaaaaaaa', 'b', 'c'], ['a', 'bbbbbbbbbb', 'c']]
col_width = max(len(word) for row in data for word in row) + 2 # padding
for row in data:
print "".join(word.ljust(col_width) for word in row)
a b c
aaaaaaaaaa b c
a ...
How do I parse a string to a float or int?
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def num(s):
try:
return int(s)
except ValueError:
return float(s)
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How do I calculate the date six months from the current date using the datetime Python module?
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hasNext in Python iterators?
Haven't Python iterators got a hasNext method?
13 Answers
13
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