Questions

Loop (for each) over an array in JavaScript

How can I loop through all the entries in an array using JavaScript?

How do I reset or revert a file to a specific revision?

How do I revert a modified file to its previous revision at a specific commit hash (which I determined via [git log](https://git-scm.com/docs/git-log) and [git diff](https://git-scm.com/docs/git-diff)...

8 Jul at 04:17

The definitive guide to form-based website authentication

> #### Moderator note: This question is not a good fit for our question and answer format with the [topicality rules](/help/on-topic) which currently apply for Stack Overflow. We normally use a "his...

How can I validate an email address in JavaScript?

I'd like to check if the user input is an email address in JavaScript, before sending it to a server or attempting to send an email to it, to prevent the most basic mistyping. How could I achieve this...

How can I safely create a directory (possibly including intermediate directories)?

I am writing a file using Python, and I want it to be placed in a specific path. How can I safely make sure that the path exists? That is: how can I check whether the folder exists, along with its par...

How do I push a new local branch to a remote Git repository and track it too?

How do I: 1. Create a local branch from another branch (via git branch or git checkout -b). 2. Push the local branch to the remote repository (i.e. publish), but make it trackable so that git pull an...

How do I replace all occurrences of a string in JavaScript?

Given a string: ``` s = "Test abc test test abc test test test abc test test abc"; ``` This seems to only remove the first occurrence of `abc` in the string above: ``` s = s.replace('abc', ''); ``` ...

24 Jul at 23:55

What is a plain English explanation of "Big O" notation?

I'd prefer as little formal definition as possible and simple mathematics.

How do I resolve merge conflicts in a Git repository?

How do I resolve merge conflicts in my Git repository?

How do I add an empty directory to a Git repository?

How do I add an empty directory (that contains no files) to a Git repository?

18 Jul at 18:41