大约有 5,600 项符合查询结果（耗时：0.0161秒） [XML]
How good is Java's UUID.randomUUID?
...
@user508633: I would actually expect to get a 100% collision rate in that specific case, but it's a very specific case indeed that goes far beyond "consistent, exact-duplicate server setups and startup procedures". I'm pretty sure you would not get any increased collisio...
Hidden features of Python [closed]
...gt;>> 10 < x < 20
False
>>> x < 10 < x*10 < 100
True
>>> 10 > x <= 9
True
>>> 5 == x > 4
True
In case you're thinking it's doing 1 < x, which comes out as True, and then comparing True < 10, which is also True, then no, that's really ...
What's so bad about in-line CSS?
...
Having to change 100 lines of code when you want to make the site look different. That may not apply in your example, but if you're using inline css for things like
<div style ="font-size:larger; text-align:center; font-weight:bold">
...
String's Maximum length in Java - calling length() method
...nd JVM Specification. I tried making a String literal that was larger than 100,000 characters, and the Eclipse compiler didn't have a problem compiling it. (And running the program was able to show that the literal had a String.length larger than 100,000.)
– coobird
...
When to use margin vs padding in CSS [closed]
... the element, when used with box-sizing: border-box; so if you have width: 100px; padding-left: 20px; the total width will still be 100px but the area for content is reduce by 20px, unlike box-sizing: content-box; where padding is separate in calculating content width which makes your total width 12...
Iterate a list with indexes in Python
...te and zip:
list1 = [1, 2, 3, 4, 5]
list2 = [10, 20, 30, 40, 50]
list3 = [100, 200, 300, 400, 500]
for i, (l1, l2, l3) in enumerate(zip(list1, list2, list3)):
print(i, l1, l2, l3)
Output:
0 1 10 100
1 2 20 200
2 3 30 300
3 4 40 400
4 5 50 500
Note that parenthesis is required after i. Othe...
Preferred method to store PHP arrays (json_encode vs serialize)
...ly %01.2f%% faster than serialize()\n", ($serializeTime / $jsonTime - 1) * 100);
}
else if ($serializeTime < $jsonTime ) {
printf("serialize() was roughly %01.2f%% faster than json_encode()\n", ($jsonTime / $serializeTime - 1) * 100);
} else {
echo "Impossible!\n";
}
function fillArray( ...
How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
...010 goes up to column XFD), so maximum of 2 string concatenations. (I used 100 iterations of translating the integers 1 to 16384, i.e. Excel columns A to XFD, as the test).
– Graham
May 4 '11 at 19:06
...
When to use IMG vs. CSS background-image?
...t;</div>
...and CSS:
#headerImage {
width: 200px;
height: 100px;
background: url(Images/headerImage.png) no-repeat;
}
A few days later, you change the location of the image. All you have to do is update the CSS:
#headerImage {
width: 200px;
height: 100px;
backgrou...
When to Redis? When to MongoDB? [closed]
...le u ON s.UserID = u.UserID WHERE u.Username = Simon and store the result, 100, as SET user:Simon:lingots = 100. Then when you award Simon 5 lingots, you read user:Simon:lingots = 100, SET user:Simon:lingots = 105, and UPDATE Store s INNER JOIN UserProfile u ON s.UserID = u.UserID SET s.Lingots = 1...