Top "Unset" questions

How to remove column from child collection

I have a collection in MongoDB called CrawlUser. It has a list called CrawlStatuses, which is a list of CrawlStatus …

mongodb unset

How to delete an exact element in a bash array?

I am trying to remove just the first appearance of any one keyword from a bash array. ARRAY=(foo bar …

arrays bash unset

How unset a lot of environment variables

Have any way to unset different variables using a one command? unset HTTP_PROXY unset HTTPS_PROXY unset FTP_PROXY …

linux unset

How can I unset a variable in C to allow usage of the same name with different datatype later on?

I want to use the same variable name with a different datatype in C program without casting. I really wanna …

c variables unset

How to unset global variables.

I have an id of a project and an id of a client that are sessions in php that are …

php jquery session-variables unset

PHP | Remove element from array with reordering?

How can I remove an element of an array, and reorder afterwards, without having an empty element in the array? &…

php arrays pointers return unset

MongoDB : Update Modifier semantics of "$unset"

In MongoDB, the update modifier unset works as follows: Consider a Mongo DB Database db with a collection users. Users …

json language-agnostic mongodb semantics unset

do we need to "unset" variables in TCL?

Is it a requirement of good TCL code? What would happen if we don't use the "unset" keyword in a …

tcl unset

PHP unset vs array_pop?

If I want to remove the last element of an array, I can use either of these two code: array_…

php arrays unset