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从功能上来说大致分为3类，在连接菜单下：
但是每种类型下面仍...
Function to calculate distance between two coordinates
...ording to Google Maps, the distance between these coordinates (from 59.3293371,13.4877472 to 59.3225525,13.4619422 ) are 2.2 kilometres while the function returns 1.6 kilometres. How can I make this function return the correct distance?
...
Focus Input Box On Load
...ction() {
var input = document.getElementById("myinputbox").focus();
}
2) How to place cursor at the end of the input text?
Here's a non-jQuery solution with some borrowed code from another SO answer.
function placeCursorAtEnd() {
if (this.setSelectionRange) {
// Double the length bec...
How do you convert a byte array to a hexadecimal string, and vice versa?
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1402
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Pandas: drop a level from a multi-level column index?
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321
You can use MultiIndex.droplevel:
>>> cols = pd.MultiIndex.from_tuples([("a", "b"), (...
Explicitly select items from a list or tuple
...
list( myBigList[i] for i in [87, 342, 217, 998, 500] )
I compared the answers with python 2.5.2:
19.7 usec: [ myBigList[i] for i in [87, 342, 217, 998, 500] ]
20.6 usec: map(myBigList.__getitem__, (87, 342, 217, 998, 500))
22.7 usec: itemgetter(87, 342, ...
What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]
...
answered Mar 21 '10 at 6:24
Andrew HareAndrew Hare
310k6363 gold badges611611 silver badges614614 bronze badges
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Apache: “AuthType not set!” 500 Error
... the line that says
Require all granted
it's only needed on Apache >=2.4
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Bootstrap combining rows (rowspan)
...ws" within a column.
div {
height:50px;
}
.short-div {
height:25px;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
<div class="container">
<h1>Responsive Bootstrap</h1>
<div class="row">
...
How to perform element-wise multiplication of two lists?
...
287
Use a list comprehension mixed with zip():.
[a*b for a,b in zip(lista,listb)]
...