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How to randomly select an item from a list?
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2751
Use random.choice()
import random
foo = ['a', 'b', 'c', 'd', 'e']
print(random.choice(foo))...
undefined reference to boost::system::system_category() when compiling
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edited Mar 15 '12 at 16:43
answered Mar 15 '12 at 16:32
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How do I make UITableViewCell's ImageView a fixed size even when the image is smaller
... cell's image views, they are all no bigger than 50x50. e.g. 40x50, 50x32, 20x37 .....
16 Answers
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Set opacity of background image without affecting child elements
... CSS linear-gradient() with rgba().
div {
width: 300px;
height: 200px;
background: linear-gradient(rgba(255,255,255,.5), rgba(255,255,255,.5)), url("https://i.imgur.com/xnh5x47.jpg");
}
span {
background: black;
color: white;
}
<div><span>Hello world.</span>...
LR性能指标解释 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的指标包括：1.服务器Linux（包括CPU、Memory、Load、I O）。2.数据库：1.Mysql 2.Oracle（缓存命中、索引、...监控指标
性能测试通常需要监控的指标包括：
1.服务器Linux（包括CPU、Memory、Load、I/O）。
2.数据库：1.Mysql 2.Oracle（缓存命...
How do I prevent Android taking a screenshot when my app goes to the background?
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268
Try FLAG_SECURE:
public class FlagSecureTestActivity extends Activity {
@Override
public ...
How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
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1129
Yes: list1 + list2. This gives a new list that is the concatenation of list1 and list2.
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What is the difference between a URI, a URL and a URN?
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What is the difference between 127.0.0.1 and localhost
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124
Well, the most likely difference is that you still have to do an actual lookup of localhost som...
How do I sort an NSMutableArray with custom objects in it?
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27 Answers
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