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sed command with -i option (in-place editing) works fine on Ubuntu but not Mac [duplicate]

I know nothing about Sed but need this command (which works fine on Ubuntu) to work on a Mac OSX: 4 Answers ...
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How to remove folders with a certain name

... If the target directory is empty, use find, filter with only directories, filter by name, execute rmdir: find . -type d -name a -exec rmdir {} \; If you want to recursively delete its contents, replace -exec rmdir {} \; by -delete or -prune -...
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How can I import one Gradle script into another?

...ommand. Read my question about same thing at: Is there a way to split/factor out common parts of Gradle build share | improve this answer | follow | ...
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How to align this span to the right of the div?

...hZ/3/ <div class="title"> <span class="name">Cumulative performance</span> <span class="date">20/02/2011</span> </div> .title .date { float:right } .title .name { float:left } share...
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“ValueError: zero length field name in format” error in Python 3.0,3.1,3.2

I'm trying learn Python (3 to be more specific) and I'm getting this error: 3 Answers ...
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Python call function within class

I have this code which calculates the distance between two coordinates. The two functions are both within the same class. 2...
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Memcache(d) vs. Varnish for speeding up 3 tier web architecture

... Varnish is in front of the webserver; it works as a reverse http proxy that caches. You can use both. Mostly write -- Varnish will need to have affected pages purged. This will result in an overhead and little benefit for modified pages. Mostly read -- Varnish will p...
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Python argparse command line flags without arguments

... line. If you are just looking to flip a switch by setting a variable True or False, have a look at http://docs.python.org/dev/library/argparse.html#action (specifically store_true and store_false) import argparse parser = argparse.ArgumentParser() parser.add_argument('-w', action='store_true') ...
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Akka Kill vs. Stop vs. Poison Pill?

...ous vs. Poison pill is asynchronous." But in what way? Does the calling actor thread lock during this time? Are the children actors notified during kill, post-stop envoked, etc? Example uses of one concept vs. the other? ...
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IsNothing versus Is Nothing

Does anyone here use VB.NET and have a strong preference for or against using IsNothing as opposed to Is Nothing (for example, If IsNothing(anObject) or If anObject Is Nothing... )? If so, why? ...