In this post, we will see how to resolve Strange behavior of unset for local variables Question: I can’t explain the following behavior of unset: edit: I would expect the result to be 1 2 It behaves that way on ...
Question: I have a global variable in JavaScript (actually a window property, but I don’t think it matters) which was already populated by a previous script, but I don’t want another script that will run later to see its value ...
Question: Before installing gnuplot, I set the environment variable GNUPLOT_DRIVER_DIR = /home/gnuplot/build/src. During the installation, something went wrong. I want to remove the GNUPLOT_DRIVER_DIR environment variable. How can I achieve it? Best Answer: unset is the command you’re looking for. ...
Question: Is there a one-line way of deleting a key from a dictionary without raising a KeyError? Best Answer: To delete a key regardless of whether it is in the dictionary, use the two-argument form of dict.pop(): This will return ...
Question: Is there an easy way to delete an element from an array using PHP, such that foreach ($array) no longer includes that element? I thought that setting it to null would do it, but apparently it does not work. ...
Question: I have this posts collection: I would like to be able to delete all likes by a specific user across all posts. I have tried using the $unset operator like this: And like this: However what these both do ...
Question: In bash shell for variables: Because set command is defined to return error if variable is not set, last line returns error: line 6: var: unbound variable OK, that is what I want. Now the same thing with arrays: ...