strings finished

StringsAndTings.js

@@ -2,27 +2,67 @@ class StringsAndTings {
 
     // @return string with identical content, and the first character capitalized
     camelCase(str){
-        return null;
+        let strSplit = str.split(" ");
+            for (let i=0; i < strSplit.length; i++){
+            let word = strSplit[i];
+            strSplit[i] = word[0].toUpperCase() + word.substring(1);
+        }
+
+            return strSplit.join(" ");
     }
 
     //@return string with identical contents, with each word individually in reverse order
     reverseString(str){
-        return null;
+        let strSplit = str.split(" ");
+            for (let i=0; i < strSplit.length; i++) {
+                let word = strSplit[i];
+                strSplit[i] = word[i].toUpperCase() + word.substring(1);
+            }
+            return str.split("").reverse().join("");        
     }
+
+
 
     // @return string with identical contents, in reverse order, with first character capitalized
     reverseThenCamelCase(str){
-        return null;
+
+        let reverseCamel = this.reverseString(str);
+            return this.camelCase(reverseCamel);
     }
 
+
     // @return string with identical contents excluding first and last character
     removeFirstAndLastCharacter(str){
-        return null;
+        let removeChar = str.substring(1, str.length-1);
+            return removeChar;
     }
 
     // @return string with identical characters, each with opposite casing
     invertCasing(str){
-        return null;
+        let string = '';
+        let i = 0;
+        while (i < str.length) {
+            let n = str.charAt(i);
+            if (n == n.toUpperCase()) {
+                // *Call* toLowerCase
+                n = n.toLowerCase();
+            }else {
+                // *Call* toUpperCase
+                n = n.toUpperCase();
+            }
+            i += 1;
+            string += n;
+        }
+            return string;
+        }
+
+    reverseWords(str){
+        let words = str.split(" ");
+        let result ="";
+            for (let i = 0; i < words.length; i++) {
+               result += words[i].split('').reverse().join('') + " ";
+        }
+            return result.trim();
     }
 }
 

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);
 });