大约有 40,000 项符合查询结果（耗时：0.0582秒） [XML]
Why does make think the target is up to date?
This is my Makefile:
4 Answers
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How do you redirect HTTPS to HTTP?
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This has not been tested but I think this should work using mod_rewrite
RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI}
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Converting SVG to PNG using C# [closed]
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You can call the command-line version of inkscape to do this:
http://harriyott.com/2008/05/converting-svg-images-to-png-in-c.aspx
Also there is a C# SVG rendering engine, primarily designed to allow SVG files to be used on the web on codeplex that might suit your ne...
How to get exit code when using Python subprocess communicate method?
...nal N (Unix only).
So you can just do (I didn't test it but it should work):
import subprocess as sp
child = sp.Popen(openRTSP + opts.split(), stdout=sp.PIPE)
streamdata = child.communicate()[0]
rc = child.returncode
(*) This happens because of the way it's implemented: after setting up threa...
python numpy machine epsilon
I am trying to understand what is machine epsilon. According to the Wikipedia, it can be calculated as follows:
3 Answers
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Collections.emptyList() vs. new instance
In practice, is it better to return an empty list like this :
7 Answers
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How does a Linux/Unix Bash script know its own PID?
I have a script in Bash called Script.sh , and it needs to know its own PID (i.e. I need to get PID inside the Script.sh )
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anchor jumping by using javascript
...o the target element.
history.replaceState(null,null,url); //Don't like hashes. Changing it back.
}
This uses replaceState to manipulate the url. If you also want support for IE, then you will have to do it the complicated way:
function jump(h){
var top = document.getElementById(h).off...
How to go to an error using only the keyboard in Eclipse?
...y I have a file with 10 lines and I have a problem with the name of the package (or something) and the cursor is on the last line of the text.
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ROW_NUMBER() in MySQL
...col1, col2) pair.
That's a groupwise maximum, one of the most commonly-asked SQL questions (since it seems like it should be easy, but actually it kind of isn't).
I often plump for a null-self-join:
SELECT t0.col3
FROM table AS t0
LEFT JOIN table AS t1 ON t0.col1=t1.col1 AND t0.col2=t1.col2 AND ...