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What is the purpose of std::make_pair vs the constructor of std::pair?
What is the purpose of std::make_pair ?
7 Answers
7
...
JavaScript is in array
...if the result > -1 and false if result === -1
– bm_i
Nov 5 '12 at 19:01
11
@bm_i Which faster?...
private[this] vs private
...nt type T occurs in contravariant position in type Option[T] of value value_=
class Holder[+T] (initialValue: Option[T]) {
This error occurs because value is a mutable variable on the covariant type T (+T) which is normally a problem unless marked as private to the instance with private[this...
Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
...
1632
Numbers
[...Array(5).keys()];
=> [0, 1, 2, 3, 4]
Character iteration
String.fromCharCo...
adito-gateway -华为云免费SSL VPN解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...出现错误提示，缺少ld-linux.so.2:
是因为64位系统中安装了32位程序
解决方法：
yum install glibc.i686
再次运行 ant start
在测试时已经能进入网页https://服务器IP地址,但是用超级用户不能登录,重启下服务器即可
#reboot
...
This type of CollectionView does not support changes to its SourceCollection from a thread different
...
answered Aug 20 '13 at 13:32
Rohit VatsRohit Vats
71.9k1212 gold badges136136 silver badges169169 bronze badges
...
Why should text files end with a newline?
....
– Konrad Rudolph
Feb 12 '19 at 11:32
7
...
Is there a NumPy function to return the first index of something in an array?
... an index error if none exist) rows, columns = np.where(array==item); first_idx = sorted([r for r, c in zip(rows, columns) if c == 0])[0]
– BrT
Jan 15 '13 at 13:44
...
Python: changing value in a tuple
...nvert back, or construct a new tuple by concatenation.
In [1]: def replace_at_index1(tup, ix, val):
...: lst = list(tup)
...: lst[ix] = val
...: return tuple(lst)
...:
In [2]: def replace_at_index2(tup, ix, val):
...: return tup[:ix] + (val,) + tup[ix+1:]
...:
S...
What is the best way to repeatedly execute a function every x seconds?
...uler.
import sched, time
s = sched.scheduler(time.time, time.sleep)
def do_something(sc):
print("Doing stuff...")
# do your stuff
s.enter(60, 1, do_something, (sc,))
s.enter(60, 1, do_something, (s,))
s.run()
If you're already using an event loop library like asyncio, trio, tkinter,...