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Test if a variable is set in bash when using “set -o nounset”
...her the variable is set, and the latter detect whether it is set or empty. From man bash: "Omitting the colon results in a test only for a parameter that is unset."
– l0b0
Jan 7 '14 at 21:00
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Remove specific characters from a string in Python
I'm trying to remove specific characters from a string using Python. This is the code I'm using right now. Unfortunately it appears to do nothing to the string.
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What are the best practices for catching and re-throwing exceptions?
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There's a reason I think you've missed from your list here - you may not be able to tell whether you can handle an exception until you've caught it and had a chance to inspect it. For example, a wrapper for a lower-level API that uses error codes (and has zillions...
Python json.loads shows ValueError: Extra data
I am getting some data from a JSON file "new.json", and I want to filter some data and store it into a new JSON file. Here is my code:
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How to gzip all files in all sub-directories into one compressed file in bash
... I run
cd ~
tar -cvzf passwd.tar.gz /etc/passwd
tar: Removing leading `/' from member names
/etc/passwd
pwd
/home/myusername
tar -xvzf passwd.tar.gz
this will create
/home/myusername/etc/passwd
unsure if all versions of tar do this:
Removing leading `/' from member names
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std::vector performance regression when enabling C++11
...tion, the difference in performance goes away.
So what is the take away from this story? That failed inlines can cost you a lot and you should make full use of the compiler capabilities: I can only recommend link time optimization. It gave a significant performance boost to my programs (up to 2.5...
How to perform file system scanning
...thod parameter is n an int. If n <= 0, Readdir returns all the FileInfo from the directory in a single slice.
– peterSO
Jul 10 '13 at 0:12
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Dynamic constant assignment
...se case leading to this Ruby error is when you build the value in a method from other run-time assets (variables, command-line arguments, ENV), typically in a constructor e.g. def initialize(db,user,password) DB=Sequel.connect("postgres://#{user}:#{password}@localhost/#{db}") end. It's one of those ...
Replace Fragment inside a ViewPager
... FragmentPagerAdapter caches the used fragments by a name which is derived from the position, so if there was a fragment at position 0, it will not be replaced even though the class is new. There are two solutions, but the simplest is to use the remove() function of FragmentTransaction, which will r...
Forgot “git rebase --continue” and did “git commit”. How to fix?
..., which was problematic..
As you can see, the rebase starts by a checkout from the remotes/origin/master branch and then applies my three commits that appear as the three previous operation (before the checkout) in the reflog.
Then, if you want to restart from a clean base, before the rebase, you ...