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How to track child process using strace?
I used strace to attach to a process briefly. The process created 90 threads. When I found the offending thread, I had to tediously search for the parent thread, then the grandparent thread, and so on all the way to the root process.
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How to append multiple values to a list in Python
I am trying to figure out how to append multiple values to a list in Python. I know there are few methods to do so, such as manually input the values, or put the append operation in a for loop, or the append and extend functions.
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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
I am trying to write a program where the names of some functions are dependent on the value of a certain macro variable with a macro like this:
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List distinct values in a vector in R
How can I list the distinct values in a vector where the values are replicative? I mean, similarly to the following SQL statement:
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How to set custom location for local installation of npm package?
Is it possible to specify a custom package destination for npm install , either through a command flag or environment variable?
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Using the slash character in Git branch name
I'm pretty sure I saw somewhere in a popular Git project the branches had a pattern like "feature/xyz".
5 Answers
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How can you use an object's property in a double-quoted string?
I have the following code:
4 Answers
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How to find all occurrences of a substring?
Python has string.find() and string.rfind() to get the index of a substring in a string.
20 Answers
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Way to read first few lines for pandas dataframe
Is there a built-in way to use read_csv to read only the first n lines of a file without knowing the length of the lines ahead of time? I have a large file that takes a long time to read, and occasionally only want to use the first, say, 20 lines to get a sample of it (and prefer not to load the...
SQLite Reset Primary Key Field
I have a few tables in SQLite and I am trying to figure out how to reset the auto-incremented database field.
4 Answers
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