大约有 40,000 项符合查询结果（耗时：0.0486秒） [XML]
Gradients in Internet Explorer 9
Does anyone know the vendor prefix for gradients within IE9 or are we still supposed to still be using their proprietry filters?
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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
Let A and B be two sets. I'm looking for really fast or elegant ways to compute the set difference ( A - B or A \B , depending on your preference) between them. The two sets are stored and manipulated as Javascript arrays, as the title says.
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Listing all permutations of a string/integer
... short:
The permutation of 1 element is one element.
The permutation of a set of elements is a list each of the elements, concatenated with every permutation of the other elements.
Example:
If the set just has one element -->
return it.
perm(a) -> a
If the set has two characters: for
each el...
What would cause an algorithm to have O(log n) complexity?
...r words, don't think about small problems where the "constant overhead" of setting up the problem matters, think about big problems. And when thinking about big problems, big-Oh of (some function of N) means that the run-time is still always less than some constant times that function. Always.
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How do I apply a perspective transform to a UIView?
...g, so I can't explain exactly why this works, but it does. You'll need to set this value to a negative fraction for your initial transform, then apply your layer rotation transforms to that. You should also be able to do the following:
Objective-C
UIView *myView = [[self subviews] objectAtIndex:...
What is the EAFP principle in Python?
...x will be assigned that something if the key isn't in the dictionary. dict.setdefault() and collections.defaultdict are nice things for avoiding excess code as well.
– JAB
Jul 13 '12 at 17:29
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Change Bootstrap tooltip color
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You can use this way:
<a href="#" data-toggle="tooltip" data-placement="bottom"
title="" data-original-title="Tooltip on bottom"
class="red-tooltip">Tooltip on bottom</a>
And in the CSS:
.tooltip-arrow,
.red-tooltip + .tooltip > .to...
How to create a circular ImageView in Android? [duplicate]
...e;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
public class RoundedImageView extends ImageView {
public RoundedImageView(Context context) {
super(context);
}
public RoundedImageView(Context context, AttributeSet...
NSLog with CGPoint data
...lightest weight way. But this gets me both x and y from the CGPoint in one set. Nice :) Great tool :)
– Spanky
Sep 25 '09 at 18:29
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How do I escape the wildcard/asterisk character in bash?
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Quoting when setting $FOO is not enough. You need to quote the variable reference as well:
me$ FOO="BAR * BAR"
me$ echo "$FOO"
BAR * BAR
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