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How do I loop through a list by twos? [duplicate]
...u can use for in range with a step size of 2:
Python 2
for i in xrange(0,10,2):
print(i)
Python 3
for i in range(0,10,2):
print(i)
Note: Use xrange in Python 2 instead of range because it is more efficient as it generates an iterable object, and not the whole list.
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Get line number while using grep
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edited May 10 at 14:10
Dominykas Mostauskis
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How to exit an if clause
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102
(This method works for ifs, multiple nested loops and other constructs that you can't break fr...
Calculating width from percent to pixel then minus by pixel in LESS CSS
...ill calculate width in some element from percent to pixel so I will minus -10px via using LESS and calc() . It´s possible?
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More than 10 lines in a node.js stack error?
Is there a way to get more than 10 lines in a node.js stack error?
4 Answers
4
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How to configure Eclipse build path to use Maven dependencies?
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answered Jan 10 '10 at 14:11
BuhbBuhb
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Remove duplicated rows using dplyr
...ow:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_number(z) == 1)
## Source: local data frame [...
Should one use < or
... the loop.
– Jon Skeet
Apr 2 '09 at 10:22
5
Generic programming with STL iterators mandates use o...
IN vs OR in the SQL WHERE Clause
...h your specific data to see which is faster.
I tried both on a MySQL with 1000000 rows. When the column is indexed there is no discernable difference in performance - both are nearly instant. When the column is not indexed I got these results:
SELECT COUNT(*) FROM t_inner WHERE val IN (1000, 2000,...
Why does (0 < 5 < 3) return true?
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edited Nov 3 '10 at 16:42
answered Nov 3 '10 at 16:34
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