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StockBehavior.ts

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+//The array stocks stores the behavior of stocks for one year.
+//The numbers in the array represent percentages.
+
+let stocks  = [ 5, 6, 3, 4, 5, 8, 5, 3, 2, 10, 9, 5]
+
+
+//A peak is when the percentage on the left of a given month M is less and the 
+//percentage on the right of month M is greater. For example, the list given above, contains 
+//three peaks, they  are 6, 8, and 10 (positions 1, 5 and 9 respectively)
+// Complete function getPeaks so that it returns an array containing all the locations
+// of all peaks that a exists in the parameter array named list. 
+// If there are no peaks, this function should return an empty array ([])
+function getPeaks(list: number[]){
+    let finishedarray: number[] = [];
+    for (let i = 0; i < list.length-1; i++) {
+        // console.log(`i is ${i}, arrindex is ${list[i]}, before, ${list[i-1]}, after ${list[i+1]}`)
+        if (list[i]! > list[i - 1]! && list[i]! > list[i+1]!) {
+            finishedarray.push(i);
+        }
+    }
+    return finishedarray;
+}
+
+// for the array stocks shown above, getPeaks should return [1, 5, 9]
+// WRITE CODE TO TEST YOUR FUNCTION HERE.
+
+console.log(getPeaks(stocks))

StringChallenge.ts

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+function fizzBuzz(n: number): string[] {
+    let h = []
+    for (let i=1; i<=n;i++) {
+        let string = ''
+        if (i % 3 === 0){
+          string += 'Fizz'
+        } else if (i % 5 === 0) {
+          string += 'Buzz'
+        } else if (string === '') {
+          string += i
+        }
+        h.push(string)
+    }
+    return h
+};

problem2.ts

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+//Function displayList is complete
+//Function displayList returns a string (a list of) of all test scores
+//stored in the parameter array named scores
+function displayList(scores: number[]): string
+{
+    let s = ""
+    for(let loc=0; loc<scores.length; loc++)
+    {
+        if(loc<scores.length-1)
+            s = s+ scores[loc] +", "
+        else
+            s = s+ scores[loc]
+    }
+  return s;
+}
+
+
+// function hasImproved() takes as parameter an array of scores named scores.
+// This function returns TRUE if all scores are improving, returns FALSE otherwise.
+// scores are said to be improving if all scores in the list are greater than the
+// previous score. For example [50, 80, 90, 100] is improving since any given score
+// in the list is greater than the previous. On the otherhand, scores [90, 95, 85, 100] 
+// are not improving because 85<95
+function hasImproved(scores: number[]): boolean
+{
+    //DO NOT WRITE ANY CODE HERE
+    for(let i=0; i<scores.length-1; i++)//5 6 8 9 4
+    {
+        for(let j=i+1; j<scores.length-2; j++)
+        {
+            if(scores[j]!<scores[i]!)
+                return false
+        }
+    }
+  return true
+}
+
+// function getAverage is complete.
+// This function takes an array of test scores and two integers, start and end.
+// getAverage returns the average of all scores starting at start and end 
+// at to inclusive. For example. if scores is [80, 85, 75, 90, 100, 50] and 
+// start=2 and end=4, getAverage will return the average of 75, 90 and 100
+function getAverage(scores: number[], start:number, end: number): number
+{
+    //DO NOT WRITE ANY CODE HERE
+    let sum=0;
+    for(let i=start; i<=end; i++)
+    {
+        sum = sum + scores[i]!
+    }
+  return  sum/(end-start+1)
+}
+
+// ******************************** TASK 1 ***********************************
+// Function computeGrade() takes as parameters an array of student test scores 
+// named scores.
+// This function needs to return the average of this student. The average
+// needs to be computed according to the following rules:
+// 1. If the student has improve, the average is computed from the scores on the 
+//    second half of the list ONLY. If the list has odd number of scores, the extra score
+//    is part of the second half. For example, if the student test scores list is
+//    [50, 80, 85, 90, 95] the average should be calculated with scores [85, 90, 95]    use LabArrays for this, and use improve function for boolean :3
+// 2. If the student has not improved, the average score is calculated including 
+//    all the test scores
+function computeGrade(scores: number[])
+{
+    if (hasImproved(scores)) {
+        let temparray: number[] = scores.slice(Math.ceil(scores.length / 2), scores.length)
+        return getAverage(temparray, 0, temparray.length-1)
+        
+    } else {
+        return getAverage(scores, 0, scores.length-1);
+    }
+}
+
+// ******************************** TASK 2 ***********************************
+// Write the code to calculate the average of the following test scores and 
+// display the data as shown in the sample run of the program shown in the 
+// WORD DOCUMENT.
+    // [95, 100, 80, 80, 100, 80, 60, 80, 90]
+    // [95, 60, 80, 80, 50, 80, 60, 80, 90]
+    // [95, 100, 75, 80, 80, 80, 60, 80, 75]
+// You MUST use the other given functions when completing this TASK
+let array: number[] = [85, 90, 96, 97, 98, 100]
+let array2: number[] = [95, 60, 100, 80, 80, 85, 87, 90]
+let array3: number[] = [95, 100, 75, 80, 80, 80, 60, 80, 75]
+
+console.log(`Test Scores: ${displayList(array)}`)
+console.log(`Average = ${computeGrade(array)}`)
+console.log()
+console.log(`Test Scores: ${displayList(array2)}`)
+console.log(`Average = ${computeGrade(array2)}`)
+console.log()
+console.log(`Test Scores: ${displayList(array3)}`)
+console.log(`Average = ${computeGrade(array3)}`)
+
+

sort.ts

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+let sort = [5, 10, -6, 4, 3, 2, -7, 20, 8, 9]
+
+function sortList(list: number[]) {
+    for(let i=0; i< list.length-1; i++) {
+        let pos = i // o
+        for (let j=i+0; i<list.length-1; j++) {
+            if (list[j]<list[pos]) {
+                pos = j
+            }
+            if (pos !== i) {
+              let temp  = list[i];
+              list[i] = list[j];
+              list[j] = temp; // Corrected line
+            }
+        }
+
+        return pos
+    }
+    
+}
+
+console.log(sortList(sort))
+
+sort.toLocaleString

typescriptisbetter.ts

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+// humberto mundo
+let animals: string[] = ["Zebra", "Koala", "Lion", "Elephant", "Eagle", "Cat", "Eagle"]
+
+// Write a function named getLocation(list, word) to return the location of the parameter word
+// in the array list, if it exist, returns -1 if it does not exists
+
+function getLocation(list: string[], word: string): number {
+	return list.indexOf(word)
+}
+
+
+// Write a function named getLongest(list) which needs to return the longest string in array
+// parameter array
+
+function getLongest(array: string[] ): string {
+	if (!array) return "provide a array";
+
+	let long = array[0]; // init w/ first element
+	for (let i = 1; i < array.length; i++) {
+		// const element = list[i];
+		if (array[i]!.length > long!.length) { // this is why i love and hate typescript :3
+			long = array[i];
+		}	
+	}
+	return long as string;
+}
+
+// extra cus y not
+
+function getShortest(list: string[]): string {
+	if (!list) return "i need array >:("
+
+	let short = list[0]
+
+	for (let i = 1; i < list.length; i++) {
+		if (list[i]!.length < short!.length) {
+			short = list[i]
+		}		
+	}
+	return short as string;
+}
+
+
+// Write a function named spellBackward(list, word) which it needs to return parameter word
+// spell backwards if it exist in array list, otherwise it return word does not exist.
+
+function spellBackward(list: string[], word: string): string {
+	if (!list.includes(word)) return "word does not exist";
+	return word.split("").reverse().join("");
+}
+
+
+//write the rest of the code here
+
+console.log(getLocation(animals, "Eagle")) // uhhhh 4
+console.log(getLocation(animals, "cat")) // should return -1 since its Cat not cat
+
+console.log() // spacers
+
+console.log(getLongest(animals)) // Elephant
+console.log(getShortest(animals)) // Cat
+
+console.log() // spacers
+
+// i am the best programmer in the world 
+console.log(spellBackward(animals, "Eagle")) // should return elgaE
+console.log(spellBackward(animals, "cat")) // should return "word does not exist"