大约有 13,922 项符合查询结果（耗时：0.0157秒） [XML]
css selector to match an element without attribute x [duplicate]
I'm working on a CSS file and find the need to style text input boxes, however, I'm running into problems. I need a simple declaration that matches all these elements:
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How to split (chunk) a Ruby array into parts of X elements? [duplicate]
... Nice. I used something similar to foo.each_slice(3).each_with_index { |f, i| puts "#{f}, #{i}" } in order to work through the array in slices (or "chunks").
– user664833
Sep 14 '12 at 19:08
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Difference between parameter and argument [duplicate]
...if you will.
That being said, they are often used interchangeably, their exact use depending on different programming languages and their communities. For example, I have also heard actual parameter etc.
So here, x and y would be formal parameters:
int foo(int x, int y) {
...
}
Whereas here...
How to move up a directory with Terminal in OS X
...any times as you want to back up through multiple parent directories. For example, cd ../../Applications would take you to Macintosh HD/Applications
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Remove and Replace Printed items [duplicate]
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Just use CR to go to beginning of the line.
import time
for x in range (0,5):
b = "Loading" + "." * x
print (b, end="\r")
time.sleep(1)
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Javascript. Assign array values to multiple variables? [duplicate]
this code works perfectly in Firefox resulting a=1, b=2 and c=3,
but it doesn't work in Chrome. Is it a Chrome bug or
it is not valid javascript code? (I failed to find it in javascript references)
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How to fix Terminal not loading ~/.bashrc on OS X Lion [closed]
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Terminal opens a login shell. This means, ~/.bash_profile will get executed, ~/.bashrc not.
The solution on most systems is to "require" the ~/.bashrc in the ~/.bash_profile: just put this snippet in your ~/.bash_profile:
[[ -s ~/.bashrc ]] && source ~/.bashrc
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Double negation (!!) in javascript - what is the purpose? [duplicate]
...true
+0 to true
-0 to true
'' to true
NaN to true
false to true
All other expressions to false
Then the other ! negates it again. A concise cast to boolean, exactly equivalent to ToBoolean simply because ! is defined as its negation. It’s unnecessary here, though, because it’s only used as the...
scrapy xpath抓取节点的文本innerText、innerHTML、outerHTML - 更多技术 -...
scrapy xpath抓取节点的文本innerText、innerHTML、outerHTML假设抓取：<p> xx<b>x< b>< p> 抓取p节点本身，得到的内容：<p>xx<b>x< b>< p>response xpath(& 39; div[@class="question"] div[2] div[2] div[1] p[1]& 39;) extract() 抓 假设抓取：
<p>
xx<b>x</b>
</p>
scra...
xxx.sh: line x: [0: command not found - 脚本技术 - 清泛IT社区，为创新赋能！
由于if [ 后面没有加空格导致的。
if [ xxx ] 表达式前后都要有空格。