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What exactly does the .join() method do?
I'm pretty new to Python and am completely confused by .join() which I have read is the preferred method for concatenating strings.
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How do I load a file into the python console?
...ontinuously copying/pasting into the python console. Is there a load command or something I can run? e.g. load file.py
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git: undo all working dir changes including new files
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git reset --hard # removes staged and working directory changes
## !! be very careful with these !!
## you may end up deleting what you don't want to
## read comments and manual.
git clean -f -d # remove untracked
git clean -f -x -d # CAUTION: as above but r...
How do I change the UUID of a virtual disk?
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The correct command is the following one.
VBoxManage internalcommands sethduuid "/home/user/VirtualBox VMs/drupal/drupal.vhd"
The path for the virtual disk contains a space, so it must be enclosed in double quotes to avoid it is parsed as...
Show current state of Jenkins build on GitHub repo
... token.
Check repo:status (I'm not sure this is necessary, but I did it, and it worked for me).
Generate the token, copy it.
Make sure the GitHub user you're going to use is a repository collaborator (for private repos) or is a member of a team with push and pull access (for organization repos) ...
Convert PDF to image with high resolution
I'm trying to use the command line program convert to take a PDF into an image (JPEG or PNG). Here is one of the PDFs that I'm trying to convert.
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Remove non-utf8 characters from string
...END;
preg_replace($regex, '$1', $text);
It searches for UTF-8 sequences, and captures those into group 1. It also matches single bytes that could not be identified as part of a UTF-8 sequence, but does not capture those. Replacement is whatever was captured into group 1. This effectively removes a...
How to view the assembly behind the code using Visual C++?
...s reading another question pertaining the efficiency of two lines of code, and the OP said that he looked at the assembly behind the code and both lines were identical in assembly. Digression aside, how could I view the assembly code created when a program is compiled.
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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
... to the corresponding getters. A big word of caution is not to mix "Field" and "Property" access types within the entity class otherwise the behavior is undefined by the JSR-317 specifications.
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Are 2^n and n*2^n in the same time complexity?
... answer this question.
The definition is that f(x) belongs to O(g(x)) if and only if the limit limsupx → ∞ (f(x)/g(x)) exists i.e. is not infinity. In short this means that there exists a constant M, such that value of f(x)/g(x) is never greater than M.
In the case of your question let f(n) ...