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How to merge every two lines into one from the command line?
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awk:
awk 'NR%2{printf "%s ",$0;next;}1' yourFile
note, there is an empty line at the end of output.
sed:
sed 'N;s/\n/ /' yourFile
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How to crop an image in OpenCV using Python
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crop_img = img[y:y+h, x:x+w]
cv2.imshow("cropped", crop_img)
cv2.waitKey(0)
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How to convert a java.util.List to a Scala list
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answered Apr 23 '13 at 8:07
FynnFynn
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Searching word in vim?
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edited Jan 19 '09 at 20:23
answered Jan 19 '09 at 19:51
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How do I find the most recent git commit that modified a file?
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answered Jan 24 '11 at 16:50
Jo LissJo Liss
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Can't choose class as main class in IntelliJ
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answered Feb 19 '14 at 15:08
trappskitrappski
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Objective-C Runtime: best way to check if class conforms to protocol?
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309
According to the docs,
[MyClass conformsToProtocol:@protocol(MyProtocol)];
should work.
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An expression tree may not contain a call or invocation that uses optional arguments
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110
The underlying expression tree API does not support optional arguments.
For IL-compiled code th...
Calendar Recurring/Repeating Events - Best Storage Method
...eta_key meta_value
1 1 repeat_start 1299132000
2 1 repeat_interval_1 432000
With repeat_start being a date with no time as a unix timestamp, and repeat_interval an amount in seconds between intervals (432000 is 5 days).
repeat_interval_1 goes with...
What happens with constraints when a view is removed
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edited Sep 4 '13 at 15:50
answered Sep 4 '13 at 15:44
rde...