Question $1$: ES$6$ Features

$$ Create a script with a function named lowerCaseWords that takes a

mixed array as input.

The function will do the following.

o return a promise that is resolved or rejected

o filter the non$-$strings and lower case the remaining words

$$ Input

const mixedArray $=[\text{'}$PIZZA$\text{'},10,$ true, $25,$ false, 'wings'$]$

$$ Output

Output $[$ 'pizza', 'wings'$]$

Question $2$: Promises

$$ Given the script file callbacks.js$,$ write a script that does the following:

o Create a method resolvedPromise that is similar to

delayedSuccess and resolves a message after a timeout of $500$ms$.$

o Create a method rejectedPromise that is similar to

delayedException and rejects an error message after a timeout of

$500$ms$.$

o Call both promises separately and handle the resolved and reject

results and then output to the console

callbacks.js

const delayedSuccess $=()=>\{$

setTimeout$(()=>\{$

let success $=\{$ 'message': 'delayed success!$\text{'}\}$;

console.log$($success$)$;

$\},500)$;

$\}$;

const delayedException $=()=>\{$

setTimeout$(()=>\{$

try $\{$

throw new Error$(\text{'}$error: delayed exception!$\text{'})$;

$\}$ catch $($e$)\{$

console.error$($e$)$;

$\}$

$\},500)$;

$\}$;

delayedSuccess$()$;

delayedException$()$;

$$ Output

$\{$ message: 'delayed success!$\text{'}\}$

$\{$ error: 'delayed exception!$\text{'}\}$

Question $3$: File Module

$$ Create a script that will do the following:

$1.$ Remove Log files

o remove all the files from the Logs directory, if exists

o output the file names to delete

o remove the Logs directory

$2.$ Create Log files

o create a Logs directory, if it does not exist

o change the current process to the new Logs directory

o create $10$ log files and write some text into the file

o output the files names to console

o Hint: use the fs module and path module, and the process current

working directory to build directory path. It is acceptable, to have a

remove.js script and separate add.js script.

$>$ Output

loge$.$txt log$1.$txt log$2.$txt log$3.$txt log$4.$txt log$5.$txt log$6.$txt log$7.$txt log$8.$txt log$9.$txt

delete files...loge$.$ txt delete files...log$1.$txt delete files...log$2.$txt delete files...log$3.$txt delete files...log$4.$ txt delete files...log$5.$ txt delete files...log$6.$txt delete files $...$log$7.$txt delete files...log$8.$txt delete files $...$log$9.$txt