Flashcards

Node JS

1. Name two objects that are available in browser runtimes but not in NodeJS.

• Common answers include window, document, and location.

2. The “global object” in the Node runtime can be referenced with the name global. What name can be used in browser runtimes to reference the “global object”?

• window

3. The ‘fs’ module contains synchronous and asynchronous versions of many of its methods. Why might one prefer to use the asynchronous versions of these methods?

• Operations on our file system can take some time because data from our hard drive must be read or written. Performing these operations asynchronously prevents the single thread of our JavaScript program from being blocked during these operations.

4. What is the name of the node module that allows us to perform operations on our local file system?

• fs

5. What is the name of the node module that allows us to take user input?

• readline

6. What site should be used as a documentation reference for JavaScript in browser runtimes?

• MDN, Mozilla Developer Network (https://developer.mozilla.org/en-US/docs/Web/JavaScript)

7. What site should be used as a documentation reference for JavaScript in the Node runtime?

• NodeJS.org (https://nodejs.org/api/)

Git Reset

1. git reset –hard

• • Moves HEAD ref to

• Discards all code changes after !

• DANGEROUS! Use with caution.

2. git reset –soft

• • Resets HEAD ref to
• Leaves changes in the staging area

3. git reset

• Same as git reset --mixed <commit hash>

• Moves HEAD ref to

• Changes moved to working directory; must be re-git added.

4. git reset HEAD myfile.js

• Removes myFile.js from the staging area