solutions for JS exercises reverseString-removeFromArray-sumAll-leapYears-tempConversion

leapYears/leapYears.js

@@ -1,5 +1,15 @@
-const leapYears = function() {
+const leapYears = function(years) {
 
+    if(years % 4 == 0 && years % 100 != 0){
+        isLeapYear = true;
+
+    }else if(years % 400 == 0){
+        isLeapYear = true;
+        
+    }else{
+        isLeapYear = false;
+    }
+    return isLeapYear;
 }
 
 module.exports = leapYears

leapYears/leapYears.spec.js

@@ -4,19 +4,19 @@ describe('leapYears', function() {
   it('works with non century years', function() {
     expect(leapYears(1996)).toEqual(true);
   });
-  xit('works with non century years', function() {
+  it('works with non century years', function() {
     expect(leapYears(1997)).toEqual(false);
   });
-  xit('works with ridiculously futuristic non century years', function() {
+  it('works with ridiculously futuristic non century years', function() {
     expect(leapYears(34992)).toEqual(true);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(1900)).toEqual(false);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(1600)).toEqual(true);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(700)).toEqual(false);
   });
 });

removeFromArray/removeFromArray.js

@@ -1,5 +1,11 @@
-const removeFromArray = function() {
 
+
+const removeFromArray = function(...args) {
+    var Arr = args[0];
+    newArr = Arr.filter(x=> !args.includes(x));
+    return newArr;
 }
     
+
+
 module.exports = removeFromArray

removeFromArray/removeFromArray.spec.js

@@ -4,19 +4,19 @@ describe('removeFromArray', function() {
   it('removes a single value', function() {
     expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
   });
-  xit('removes multiple values', function() {
+  it('removes multiple values', function() {
     expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
   });
-  xit('ignores non present values', function() {
+  it('ignores non present values', function() {
     expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
   });
-  xit('ignores non present values, but still works', function() {
+  it('ignores non present values, but still works', function() {
     expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
   });
-  xit('can remove all values', function() {
+  it('can remove all values', function() {
     expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
   });
-  xit('works with strings', function() {
+  it('works with strings', function() {
     expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
   });
 });

reverseString/reverseString.spec.js

@@ -9,7 +9,7 @@ describe('reverseString', function() {
     expect(reverseString('hello there')).toEqual('ereht olleh')
   })
 
-  xit('works with numbers and punctuation', function() {
+  it('works with numbers and punctuation', function() {
     expect(reverseString('123! abc!')).toEqual('!cba !321')
   })
 });

sumAll/sumAll.js

@@ -1,5 +1,19 @@
-const sumAll = function() {
-
+const sumAll = function(a,b) {
+    if (typeof(a) != "number" || typeof(b) != "number"  || a<0 || b<0){
+        return "ERROR"
+    }else{
+    if(a<b){
+        var S = a;
+        for(var i = a+1;i<=b ;i++){
+            S=S+i;
+            }
+        }else{
+            var S = b;
+            for(var i = b+1;i<=a ;i++){
+            S=S+i;
+            }
+        }
+    }
+    return S;
     }
-
 module.exports = sumAll

sumAll/sumAll.spec.js

@@ -4,19 +4,19 @@ describe('sumAll', function() {
   it('sums numbers within the range', function() {
     expect(sumAll(1, 4)).toEqual(10);
   });
-  xit('works with large numbers', function() {
+  it('works with large numbers', function() {
     expect(sumAll(1, 4000)).toEqual(8002000);
   });
-  xit('works with larger number first', function() {
+  it('works with larger number first', function() {
     expect(sumAll(123, 1)).toEqual(7626);
   });
-  xit('returns ERROR with negative numbers', function() {
+  it('returns ERROR with negative numbers', function() {
     expect(sumAll(-10, 4)).toEqual('ERROR');
   });
-  xit('returns ERROR with non-number parameters', function() {
+  it('returns ERROR with non-number parameters', function() {
     expect(sumAll(10, "90")).toEqual('ERROR');
   });
-  xit('returns ERROR with non-number parameters', function() {
+  it('returns ERROR with non-number parameters', function() {
     expect(sumAll(10, [90, 1])).toEqual('ERROR');
   });
 });

tempConversion/tempConversion.js

@@ -1,9 +1,11 @@
-const ftoc = function() {
-
+const ftoc = function(F) {
+var C = (F-32) * 5/9;
+return Math.round(C*10)/10;
 }
 
-const ctof = function() {
-
+const ctof = function(C) {
+var F = C * 9/5 + 32;
+return Math.round(F*10)/10;
 }
 
 module.exports = {

tempConversion/tempConversion.spec.js

@@ -4,22 +4,22 @@ describe('ftoc', function() {
   it('works', function() {
     expect(ftoc(32)).toEqual(0);
   });
-  xit('rounds to 1 decimal', function() {
+  it('rounds to 1 decimal', function() {
     expect(ftoc(100)).toEqual(37.8);
   });
-  xit('works with negatives', function() {
+  it('works with negatives', function() {
     expect(ftoc(-100)).toEqual(-73.3);
   });
 });
 
 describe('ctof', function() {
-  xit('works', function() {
+  it('works', function() {
     expect(ctof(0)).toEqual(32);
   });
-  xit('rounds to 1 decimal', function() {
+  it('rounds to 1 decimal', function() {
     expect(ctof(73.2)).toEqual(163.8);
   });
-  xit('works with negatives', function() {
+  it('works with negatives', function() {
     expect(ctof(-10)).toEqual(14);
   });
 });