Tasks Completed

src/array.js

@@ -11,7 +11,14 @@
  *    [0, 1, 2, 3, 4, 5], 5    => 5
  */
 function findElement(arr, value) {
-	throw new Error("Not implemented");
+	for(let i=0;i<arr.length;i++)
+	{
+		if(arr[i]==value)
+		{
+			return i;
+		}
+	}
+	return -1;
 }
 
 /**
@@ -27,7 +34,16 @@ function findElement(arr, value) {
  *    [] => []
  */
 function doubleArray(arr) {
-	throw new Error("Not implemented");
+	let arr1=[];
+	for(let i=0;i<arr.length;i++)
+	{
+		arr1.push(arr[i]);
+	}
+	for(let i=0;i<arr.length;i++)
+	{
+		arr1.push(arr[i]);
+	}
+	return arr1;
 }
 
 /**
@@ -42,7 +58,13 @@ function doubleArray(arr) {
  *    [] => []
  */
 function getArrayOfPositives(arr) {
-	throw new Error("Not implemented");
+	for(let i=0;i<arr.length;i++){
+		if(arr[i]<=0){
+			arr.splice(i,1);
+			i--;
+		}
+	}
+	return arr;
 }
 
 /**
@@ -59,7 +81,13 @@ function getArrayOfPositives(arr) {
  *    [ false, 0, NaN, '', undefined ]   => [ ]
  */
 function removeFalsyValues(arr) {
-	throw new Error("Not implemented");
+	for(let i=0;i<arr.length;i++){
+		if(!arr[i]){
+			arr.splice(i,1);
+			i--;
+		}
+	}
+	return arr;
 }
 
 /**
@@ -73,7 +101,11 @@ function removeFalsyValues(arr) {
  *    [ 'angular', 'react', 'ember' ] => [ 7, 5, 5 ]
  */
 function getStringsLength(arr) {
-	throw new Error("Not implemented");
+	let arr1=[];
+	for(let i=0;i<arr.length;i++){
+		arr1.push(arr[i].length);
+	}
+	return arr1;
 }
 
 /**
@@ -89,7 +121,11 @@ function getStringsLength(arr) {
  *   [ 1, 10, 100, 1000 ]  => 1111
  */
 function getItemsSum(arr) {
-	throw new Error("Not implemented");
+	let sum=0;
+	for(let i=0;i<arr.length;i++){
+		sum+=arr[i];
+	}
+	return sum;
 }
 
 module.exports = {

src/bulb.js

@@ -5,16 +5,30 @@ const BULB_OFF_URL = "https://i.postimg.cc/KjK1wL3c/bulb-off.png";
 TODO:
 Fetch the status of the 'flexSwitchCheckChecked' checkbox and call the appropiate function to turn the bulb on or off
 */
-function lightSwitch() {}
+function lightSwitch() {
+    const checkbox = document.getElementById('flexSwitchCheckChecked');
+
+    if (checkbox.checked) {
+      bulb_on();
+    } else {
+      bulb_off();
+    }
+  }
 
 /*
 TODO:
 Set the "bulb" element's Image src to be the image specified by BULB_ON_URL
 */
-function bulb_on() {}
+function bulb_on() {
+    const bulbElement = document.getElementById('bulb');
+    bulbElement.src = BULB_ON_URL;
+  }
 
 /*
 TODO:
 Set the "bulb" element's Image src to be the image specified by BULB_OFF_URL
 */
-function bulb_off() {}
+function bulb_off() {
+    const bulbElement = document.getElementById('bulb');
+    bulbElement.src = BULB_OFF_URL;
+  }

src/conditionalAndLoops.js

@@ -19,7 +19,22 @@
  *
  */
 function getFizzBuzz(num) {
-	throw new Error("Not implemented");
+	if(num%3==0 && num%5==0)
+	{
+		return 'FizzBuzz';
+	}
+	else if(num%3==0)
+	{
+		return 'Fizz';
+	}
+	else if(num%5==0)
+	{
+		return 'Buzz';
+	}
+	else
+	{
+		return num;
+	}
 }
 
 /**
@@ -34,7 +49,12 @@ function getFizzBuzz(num) {
  *   10 => 3628800
  */
 function getFactorial(n) {
-	throw new Error("Not implemented");
+	let fact=1;
+	for(let i=1;i<=n;i++)
+	{
+		fact=fact*i;
+	}
+	return fact;
 }
 
 /**
@@ -50,7 +70,12 @@ function getFactorial(n) {
  *   -1,1  =>  0  ( = -1 + 0 + 1 )
  */
 function getSumBetweenNumbers(n1, n2) {
-	throw new Error("Not implemented");
+	let sum=0;
+	for(let i=n1;i<=n2;i++)
+	{
+		sum=sum+i;
+	}
+	return sum;
 }
 
 /**
@@ -69,7 +94,10 @@ function getSumBetweenNumbers(n1, n2) {
  *   10,10,10 =>  true
  */
 function isTriangle(a, b, c) {
-	throw new Error("Not implemented");
+	if(a+b>c && a+c>b && b+c>a)
+		return true;
+	else
+		return false;
 }
 
 /**
@@ -85,7 +113,7 @@ function isTriangle(a, b, c) {
  * 'noon' => 'noon'
  */
 function reverseString(str) {
-	throw new Error("Not implemented");
+	return str.split("").reverse().join("");
 }
 
 /**
@@ -110,7 +138,26 @@ function reverseString(str) {
  *   '{[(<{[]}>)]}' = true
  */
 function isBracketsBalanced(str) {
-	throw new Error("Not implemented");
+	let flag = true;
+	let arr = [];
+	let open = ['[', '{', '(', '<'];
+	let close = [']', '}', ')', '>'];
+	for (let i = 0; i < str.length; i++) {
+		if (open.indexOf(str[i]) != -1) {
+			arr.push(str[i]);
+		}
+		else if (close.indexOf(str[i]) != -1) {
+			let openIndex = open.indexOf(arr.pop());
+			let closeIndex = close.indexOf(str[i]);
+			if (openIndex != closeIndex) {
+				flag = false;
+			}
+		}
+	}
+	if (arr.length != 0) {
+		flag = false;
+	}
+	return flag;
 }
 
 /**
@@ -145,8 +192,36 @@ function isBracketsBalanced(str) {
  *
  */
 function timespanToHumanString(startDate, endDate) {
-	throw new Error("Not implemented");
-}
+	const diff = endDate - startDate;
+	const seconds = diff / 1000;
+	const minutes = seconds/60;
+	const hours = minutes / 60;
+	const days = hours / 24;
+
+	if (seconds <= 45) {
+	  return 'a few seconds ago';
+	} else if (seconds <= 90) {
+	  return 'a minute ago';
+	} else if (minutes <= 45) {
+	  return `${Math.floor(minutes)} minutes ago`;
+	} else if (minutes <= 90) {
+	  return 'an hour ago';
+	} else if (hours <= 22) {
+	  return `${Math.floor(hours)} hours ago`;
+	} else if (hours <= 36) {
+	  return 'a day ago';
+	} else if (days <= 25) {
+	  return `${Math.ceil(days)} days ago`;
+	} else if (days <= 45) {
+	  return 'a month ago';
+	} else if (days <= 345) {
+	  return `${Math.ceil(days / 30)} months ago`;
+	} else if (days <= 545) {
+	  return 'a year ago';
+	} else {
+	  return `${Math.ceil(days / 365)} years ago`;
+	}
+  }
 
 /**
  * Returns the string with n-ary (binary, ternary, etc, where n<=10) representation of
@@ -169,7 +244,7 @@ function timespanToHumanString(startDate, endDate) {
  *    365, 10 => '365'
  */
 function toNaryString(num, n) {
-	throw new Error("Not implemented");
+	return num.toString(n);
 }
 
 module.exports = {

src/numbers.js

@@ -10,7 +10,7 @@
  *   5, 5  => 25
  */
 function getRectangleArea(width, height) {
-	throw new Error("Not implemented");
+	return width*height;
 }
 
 /**
@@ -26,7 +26,13 @@ function getRectangleArea(width, height) {
  *  -3, 3  => 0
  */
 function getAverage(value1, value2) {
-	throw new Error("Not implemented");
+	let average = (value1 + value2) / 2;
+
+	if (average === Infinity) {
+	  return Number.MAX_VALUE;
+	}
+
+	return average;
 }
 
 /**
@@ -42,7 +48,12 @@ function getAverage(value1, value2) {
  *   5*x = 0         => 0
  */
 function getLinearEquationRoot(a, b) {
-	throw new Error("Not implemented");
+	let x = -b/a;
+	if (x === 0) {
+		return 0;
+	  } else {
+		return x;
+	  }
 }
 
 /**
@@ -58,7 +69,8 @@ function getLinearEquationRoot(a, b) {
  *     0     => 0
  */
 function getLastDigit(value) {
-	throw new Error("Not implemented");
+	let a = value%10;
+	return Math.abs(a);
 }
 
 /**
@@ -73,7 +85,8 @@ function getLastDigit(value) {
  * '-525.5'     => -525.5
  */
 function parseNumberFromString(value) {
-	throw new Error("Not implemented");
+	let a = Number(value);
+	return a;
 }
 
 /**
@@ -94,7 +107,20 @@ function parseNumberFromString(value) {
  *   17 => true
  */
 function isPrime(n) {
-	throw new Error("Not implemented");
+	let a = true;
+	if(n==1){
+		return false;
+	}
+	if(n==2){
+		return true;
+	}
+	for(let i=2;i<n;i++){
+		if(n%i==0){
+			a = false;
+			break;
+		}
+	}
+	return a;
 }
 
 module.exports = {