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How to deep copy a list?
...hon objects.
See the following snippet -
>>> a = [[1, 2, 3], [4, 5, 6]]
>>> b = list(a)
>>> a
[[1, 2, 3], [4, 5, 6]]
>>> b
[[1, 2, 3], [4, 5, 6]]
>>> a[0][1] = 10
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b # b changes too -> Not a deep...
How can I wait for set of asynchronous callback functions?
...times out after a long time.
jQuery Promises
Adding to my answer in 2014. These days, promises are often used to solve this type of problem since jQuery's $.ajax() already returns a promise and $.when() will let you know when a group of promises are all resolved and will collect the return resu...
HTML5 Video Dimensions
...
<video id="foo" src="foo.mp4"></video>
var vid = document.getElementById("foo");
vid.videoHeight; // returns the intrinsic height of the video
vid.videoWidth; // returns the intrinsic width of the video
Spec: https://html.spec.whatwg.org/mu...
Is there a way to iterate over a slice in reverse in Go?
...
141
No there is no convenient operator for this to add to the range one in place. You'll have to do...
How to round up to the nearest 10 (or 100 or X)?
...
64
If you just want to round up to the nearest power of 10, then just define:
roundUp <- functi...
How to check if a path is absolute path or relative path in cross platform way with Python?
...
answered Jul 23 '10 at 16:47
Donald MinerDonald Miner
34.6k66 gold badges8484 silver badges108108 bronze badges
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C++ stl stack/queue 的使用方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...t1 和t2 的顺序
}
main()
{
priority_queue<T> q;
q.push(T(4,4,3));
q.push(T(2,2,5));
q.push(T(1,5,4));
q.push(T(3,3,6));
while (!q.empty())
{
T t = q.top(); q.pop();
cout << t.x << " " << t.y << " " << t.z << endl;
}
return 1;
}
输出...
Simultaneously merge multiple data.frames in a list
... = 1:3, stringsAsFactors=FALSE)
y <- data.frame(i = c("b","c","d"), k = 4:6, stringsAsFactors=FALSE)
z <- data.frame(i = c("c","d","a"), l = 7:9, stringsAsFactors=FALSE)
Update June 2018: I divided the answer in three sections representing three different ways to perform the merge. You proba...
Disable Rails SQL logging in console
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Ryan BiggRyan Bigg
101k2020 gold badges224224 silver badges248248 bronze badges
1
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