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round() for float in C++
...ath (according to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf)
#include <cmath>
#include <iostream>
int main(int argc, char** argv) {
std::cout << "round(0.5):\t" << round(0.5) << std::endl;
std::cout << "round(-0.5):\t" << round(...
Define a lambda expression that raises an Exception
...7,'|\0\0\202\1\0',(),(),('x',),'','',1,''),{}
)(Exception())
And a python3 strong stomach solution:
type(lambda: 0)(type((lambda: 0).__code__)(
1,0,1,1,67,b'|\0\202\1\0',(),(),('x',),'','',1,b''),{}
)(Exception())
Thanks @WarrenSpencer for pointing out a very simple answer if you don't ca...
Add single element to array in numpy
... khaverim
2,60155 gold badges2727 silver badges3939 bronze badges
answered Sep 7 '11 at 11:21
steabertsteabert
5,24922 gold b...
Looping over a list in Python
...with sublists in it. I want to print all the sublists with length equal to 3.
4 Answers
...
Assign multiple columns using := in data.table, by group
...
This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, b = 1:6)
f <- function(x) {list("hi", "hello")}
x[ , c("col1", "col2") := f(), by = a][]
# a b col1 col2
# 1: 1 1 hi hello
# 2: 2 2 hi hello
...
Difference between Big-O and Little-O Notation
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edited Dec 16 '17 at 18:37
Mohamed El-Nakib
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ans...
Backporting Python 3 open(encoding=“utf-8”) to Python 2
I have a Python codebase, built for Python 3, which uses Python 3 style open() with encoding parameter:
6 Answers
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MySQL IF NOT NULL, then display 1, else display 0
...
LEFT JOIN addresses a ON c.customerid = a.customerid
WHERE customerid = 123
share
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Can I set an opacity only to the background image of a div?
...:before pseudo-element
Another trick is to use the CSS 2.1 :before or CSS 3 ::before pseudo-elements. :before pseudo-element is supported in IE from version 8, while the ::before pseudo-element is not supported at all. This will hopefully be rectified in version 10.
HTML
<div class="myDiv">...
Stream.Seek(0, SeekOrigin.Begin) or Position = 0
...
answered Aug 30 '11 at 5:22
gordygordy
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