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Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers
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edited May 23 '17 at 11:46
Community♦
111 silver badge
answered Sep 13 '12 at 19:58
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Difference between 'python setup.py install' and 'pip install'
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3 Answers
3
Active
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How do I execute a program using Maven?
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Aaron N. Brock
3,06122 gold badges1515 silver badges3232 bronze badges
answered Mar 18 '10 at 19:29
Pascal ThiventPa...
break out of if and foreach
...how many loop structures it should break. Example:
foreach (array('1','2','3') as $a) {
echo "$a ";
foreach (array('3','2','1') as $b) {
echo "$b ";
if ($a == $b) {
break 2; // this will break both foreach loops
}
}
echo ". "; // never reached!
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How does bash tab completion work?
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edited Jul 30 '18 at 20:44
Seltzer
14455 bronze badges
answered Apr 7 '11 at 0:04
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What's the difference setting Embed Interop Types true and false in Visual Studio?
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answered Dec 11 '13 at 9:29
Adam HouldsworthAdam Houldsworth
58.8k99 gold badges134134 silver badges172172 bronze badges
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URL query parameters to dict python
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193
Use the urllib.parse library:
>>> from urllib import parse
>>> url = "http://...
Check if value already exists within list of dictionaries?
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273
Here's one way to do it:
if not any(d['main_color'] == 'red' for d in a):
# does not exist
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What does SQL clause “GROUP BY 1” mean?
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edited Aug 20 '18 at 12:03
answered Sep 12 '11 at 19:12
Yu...
Persistent invalid graphics state error when using ggplot2
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357
I ran into this same error and solved it by running:
dev.off()
and then running the plot a...