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Does Git Add have a verbose switch
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For some git-commands you can specify --verbose,
git 'command' --verbose
or
git 'command' -v.
Make sure the switch is after the actual git command. Otherwise - it won't work!
Also useful:
git 'command' --dry-run
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How to exit if a command failed?
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Use { } in place of ( )
Introduce ; after exit and
spaces after { and before }
Since you want to print the message and exit only when the command fails ( exits with non-zero value) you need a || not an &&.
cmd1 && cmd2
will run cmd2 when cmd1 succeeds(exit value 0). Where as
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Why doesn't list have safe “get” method like dictionary?
...name, not directly access the 37th item in the dictionary (which would be more like what you're asking of your list).
Of course, you can easily implement this yourself:
def safe_list_get (l, idx, default):
try:
return l[idx]
except IndexError:
return default
You could even monkeypatc...
How do I use CMake?
I am trying to use CMake in order to compile opencv.
4 Answers
4
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RabbitMQ message size and types
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Theoretically anything can be stored/sent as a message. You actually don't want to store anything on the queues. The system works most efficiently if the queues are empty most of the time. You can send anything you want to th...
Splitting templated C++ classes into .hpp/.cpp files--is it possible?
I am getting errors trying to compile a C++ template class which is split between a .hpp and .cpp file:
16 Answers
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Why can I throw null in Java? [duplicate]
...ttempting to throw null itself throws a NullPointerException.
In other words, throw checks that its argument is nonnull, and if it is null, it throws a NullPointerException.
JLS 14.18 specifies this behavior:
If evaluation of the Expression completes normally, producing a null value, then an...
Java generics type erasure: when and what happens?
I read about Java's type erasure on Oracle's website .
7 Answers
7
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How to limit depth for recursive file list?
... "{}" \;
Here I used 1 as max level depth, -type d means find only directories, which then ls -ld lists contents of, in long format.
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Update MongoDB field using value of another field
... aggregation pipeline in the update document and the updateOne, updateMany or update collection method. Note that the latter has been deprecated in most if not all languages drivers.
MongoDB 4.2+
Version 4.2 also introduced the $set pipeline stage operator which is an alias for $addFields. I will...