大约有 40,000 项符合查询结果（耗时：0.0755秒） [XML]
Why switch is faster than if
...
answered Jul 15 '11 at 10:56
DanielDaniel
25.2k1616 gold badges8484 silver badges128128 bronze badges
...
Show percent % instead of counts in charts of categorical variables
... geom_bar(aes(y = (..count..)/sum(..count..))) +
## version 3.0.0
scale_y_continuous(labels=percent)
Here's a reproducible example using mtcars:
ggplot(mtcars, aes(x = factor(hp))) +
geom_bar(aes(y = (..count..)/sum(..count..))) +
scale_y_continuous(labels...
How to do this using jQuery - document.getElementById(“selectlist”).value
...
150
$('#selectlist').val();
...
Maximum single-sell profit
...ry!), but it's helpful to see the algorithm evolve:
5 10 4 6 7
min 5 5 4 4 4
best (5,5) (5,10) (5,10) (5,10) (5,10)
Answer: (5, 10)
5 10 4 6 12
min ...
Getting image dimensions without reading the entire file
...
106
Your best bet as always is to find a well tested library. However, you said that is difficult, ...
Removing elements by class name?
...
Lior CohenLior Cohen
8,08322 gold badges2626 silver badges2727 bronze badges
...
Detecting a mobile browser
...opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|...
Placing border inside of div and not on its edge
...-box-sizing: border-box;
-webkit-box-sizing: border-box;
width: 100px;
height: 100px;
border: 20px solid #f00;
background: #00f;
margin: 10px;
}
div + div {
border: 10px solid red;
}
<div>Hello!</div>
<div>Hello!</div>
It works...
Finding Number of Cores in Java
... |
edited Nov 17 '11 at 9:03
answered Jan 21 '11 at 13:58
d...
Does pandas iterrows have performance issues?
...ateen Ulhaq
16.6k1111 gold badges6464 silver badges105105 bronze badges
answered Jul 21 '14 at 17:39
JeffJeff
100k1717 gold badges...