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In java how to get substring from a string till a character c?
...ing firstWord = filename.replaceAll("\\..*","")
This replaces everything from the first dot to the end with "" (ie it clears it, leaving you with what you want)
Here's a test:
System.out.println("abc.def.hij".replaceAll("\\..*", "");
Output:
abc
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Return multiple columns from pandas apply()
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This is an old question, but for completeness, you can return a Series from the applied function that contains the new data, preventing the need to iterate three times. Passing axis=1 to the apply function applies the function sizes to each row of the dataframe, returning a series to add to a n...
How to check task status in Celery?
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Return the task_id (which is given from .delay()) and ask the celery instance afterwards about the state:
x = method.delay(1,2)
print x.task_id
When asking, get a new AsyncResult using this task_id:
from celery.result import AsyncResult
res = AsyncResult("...
Threading pool similar to the multiprocessing Pool?
...t is hidden somewhat and not properly documented.
It can be imported via
from multiprocessing.pool import ThreadPool
It is implemented using a dummy Process class wrapping a python thread. This thread-based Process class can be found in multiprocessing.dummy which is mentioned briefly in the do...
Copy all files with a certain extension from all subdirectories
... unix, I want to copy all files with a certain extension (all excel files) from all subdirectories to another directory. I have the following command:
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Git: Permission denied (publickey) fatal - Could not read from remote repository. while cloning Git
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This answer changed the mechanism from ssh to https. It is not solving the original problem by using ssh to access the repository. I wonder how this can keep getting upvoted as a good answer to the question. The other answers down below are solving it properl...
Are Git forks actually Git clones?
...and upstream on GitHub?"
And with Git 2.20 (Q4 2018) and more, fetching from fork is more efficient, with delta islands.
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Remove DEFINER clause from MySQL Dumps
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The sed command does not remove DEFINER clause from procedures and functions. Here is the enhanced version that handles views, triggers, procedures and functions: sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/' | sed -e 's/DEFINER[ ]*=[ ]*[^*]*PROCEDURE/PROCEDURE/' | sed -e 's/DE...
When would anyone use a union? Is it a remnant from the C-only days?
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@Russel C++ classes can not be used from a C program, but C structs/unions can be easily accesed from C++ using an 'extern "C"' block.
– vz0
Jan 25 '11 at 14:54
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How can I parse a CSV string with JavaScript, which contains comma in data?
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As austincheney correctly points out, you really need to parse the string from start to finish if you wish to properly handle quoted strings that may contain escaped characters. Also, the OP does not clearly define what a "CSV string" really is. First we must define what constitutes a valid CSV str...