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How do I pause my shell script for a second before continuing?
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Use the sleep command.
Example:
sleep .5 # Waits 0.5 second.
sleep 5 # Waits 5 seconds.
sleep 5s # Waits 5 seconds.
sleep 5m # Waits 5 minutes.
sleep 5h # Waits 5 hours.
sleep 5d # Waits 5 days.
One can also employ decimals when specifying a time unit; e.g. sle...
Detecting a mobile browser
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1375
Using Regex (from detectmobilebrowsers.com):
Here's a function that uses an insanely long and c...
What is the difference between String.slice and String.substring?
...aniel VassalloDaniel Vassallo
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Drop rows with all zeros in pandas data frame
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answered Mar 26 '14 at 1:59
U2EF1U2EF1
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Generate random password string with requirements in javascript
I want to generate a random string that has to have 5 letters from a-z and 3 numbers.
18 Answers
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Is there a way to 'uniq' by column?
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335
sort -u -t, -k1,1 file
-u for unique
-t, so comma is the delimiter
-k1,1 for the key field 1
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Django dynamic model fields
...for faster queries.
– GDorn
Mar 1 '15 at 6:10
1
Updated today to note Django's adoption of HStore...
Center content of UIScrollView when smaller
...tX = MAX((scrollView.bounds.size.width - scrollView.contentSize.width) * 0.5, 0.0);
CGFloat offsetY = MAX((scrollView.bounds.size.height - scrollView.contentSize.height) * 0.5, 0.0);
subView.center = CGPointMake(scrollView.contentSize.width * 0.5 + offsetX,
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Why is it possible to recover from a StackOverflowError?
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5 Answers
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Active
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Do NSUserDefaults persist through an Update to an app in the Appstore?
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coneybeareconeybeare
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