Committing solutions to problems

StringsAndTings.js

@@ -2,27 +2,61 @@ class StringsAndTings {
 
     // @return string with identical content, and the first character capitalized
     camelCase(str){
-        return null;
+        let string = str.split(" ");
+        for (let i = 0; i < string.length; i++) {
+            let word = string[i];
+            string[i] = word[0].toUpperCase() + word.substring(1);
+        }
+        return string.join(" ");
     }
 
     //@return string with identical contents, with each word individually in reverse order
     reverseString(str){
-        return null;
+
+        return str.split("").reverse().join("");
+    }
+
+    //return string with each word reversed but still in same order
+    reverseWords(str){
+        let stringSplit = str.split(" ");
+        let newArr = [];
+        for (let i = 0; i < stringSplit.length; i++){
+            stringSplit[i] = stringSplit[i].split("").reverse()
+            let rejoin = stringSplit[i].join("") + " "
+            newArr += rejoin;
+        }
+        return newArr.trim();
     }
 
     // @return string with identical contents, in reverse order, with first character capitalized
     reverseThenCamelCase(str){
-        return null;
+        let reverseCap = str.split("").reverse().join("");
+        let string = reverseCap.split(" ");
+        for (let i = 0; i < string.length; i++) {
+            let word = string[i];
+            string[i] = word[0].toUpperCase() + word.substring(1);
+        }
+        return string.join(" ");
     }
 
     // @return string with identical contents excluding first and last character
     removeFirstAndLastCharacter(str){
-        return null;
+        let firstLastChar = str.substring(1, str.length - 1);
+        return firstLastChar;
+
     }
 
     // @return string with identical characters, each with opposite casing
     invertCasing(str){
-        return null;
+        var output = "";
+        for(var i = 0; i < str.length; i++){
+            if(str[i] == str[i].toUpperCase()){
+                output += str[i].toLowerCase();
+            }else {
+                output += str[i].toUpperCase();
+            }           
+        }
+        return output;
     }
 }
 

StringsAndTings.test.js

@@ -8,7 +8,7 @@ test("camelCaseTest", () => {
     let input = "she sells sea shells";
     let expected = "She Sells Sea Shells";
 
-    let actual = stringsAndTings.camelCase(15);
+    let actual = stringsAndTings.camelCase(input);
 
     expect(actual).toEqual(expected);
 });
@@ -19,7 +19,7 @@ test("reverseTest", () => {
     let input = "she sells sea shells";
     let expected = "sllehs aes slles ehs";
 
-    let actual = stringsAndTings.camelCase(15);
+    let actual = stringsAndTings.reverseString(input);
 
     expect(actual).toEqual(expected);
 });
@@ -30,7 +30,7 @@ test("reverseWordsTest", () => {
     let input = "she sells sea shells";
     let expected = "ehs slles aes sllehs";
 
-    let actual = stringsAndTings.camelCase(15);
+    let actual = stringsAndTings.reverseWords(input);
 
     expect(actual).toEqual(expected);
 });
@@ -41,7 +41,7 @@ test("reverseThenCamelCaseTest", () => {
     let input = "she sells sea shells";
     let expected = "Sllehs Aes Slles Ehs";
 
-    let actual = stringsAndTings.camelCase(15);
+    let actual = stringsAndTings.reverseThenCamelCase(input);
 
     expect(actual).toEqual(expected);
 });
@@ -52,7 +52,7 @@ test("removeFirstAndLastCharacterTest", () => {
     let input = "she sells sea shells";
     let expected = "he sells sea shell";
 
-    let actual = stringsAndTings.camelCase(15);
+    let actual = stringsAndTings.removeFirstAndLastCharacter(input);
 
     expect(actual).toEqual(expected);
 });
@@ -64,7 +64,7 @@ test("invertCasingTest1", () => {
     let input = "shE sells SEA sHeLlS";
     let expected = "SHe SELLS sea ShElLs";
 
-    let actual = stringsAndTings.camelCase(15);
+    let actual = stringsAndTings.invertCasing(input);
 
     expect(actual).toEqual(expected);
 });