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How to convert String to long in Java?
...eLong()
Long.parseLong("0", 10) // returns 0L
Long.parseLong("473", 10) // returns 473L
Long.parseLong("-0", 10) // returns 0L
Long.parseLong("-FF", 16) // returns -255L
Long.parseLong("1100110", 2) // returns 102L
Long.parseLong("99", 8) // throws a NumberFo...
prototype based vs. class based inheritance
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edited Nov 19 '13 at 17:19
tig
19.5k1010 gold badges5757 silver badges9191 bronze badges
answered Ma...
Do you have to put Task.Run in a method to make it async?
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597
First, let's clear up some terminology: "asynchronous" (async) means that it may yield control b...
Calculate the number of business days between two dates?
...t businessDays = span.Days + 1;
int fullWeekCount = businessDays / 7;
// find out if there are weekends during the time exceedng the full weeks
if (businessDays > fullWeekCount*7)
{
// we are here to find out if there is a 1-day or 2-days weekend
...
How to drop columns by name in a data frame
...ubset function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column indexation :
R> df[ , -which(names(df) %in% c("z","u"))]
x y
1 1 2
2 2 3
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Why am I merging “remote-tracking branch 'origin/develop' into develop”?
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edited May 23 '17 at 12:34
Community♦
111 silver badge
answered Jun 20 '11 at 4:55
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Does free(ptr) where ptr is NULL corrupt memory?
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227
7.20.3.2 The free function
Synopsis
#include <stdlib.h>
void free(void *ptr); ...
How to check if a string contains an element from a list in Python
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– Lauritz V. Thaulow
May 31 '14 at 23:47
5
And if I want to know what ext is when any() returns True...
Force LF eol in git repo and working copy
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237
Without a bit of information about what files are in your repository (pure source code, images, ...
When to make a type non-movable in C++11?
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17
+1 a less exotic example of something that can't be moved because it has a special address is a node in a directed graph structure.
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