Merge pull request #396 from jamienorthman/main

10_fibonacci: handling of string zero & update of tests

10_fibonacci/fibonacci.spec.js

@@ -16,9 +16,15 @@ describe('fibonacci', () => {
   test.skip('25th fibonacci number is 75025', () => {
     expect(fibonacci(25)).toBe(75025);
   });
+  test.skip('0th fibonacci number is 0', () => {
+    expect(fibonacci(0)).toBe(0);
+  });
   test.skip('doesn\'t accept negatives', () => {
     expect(fibonacci(-25)).toBe("OOPS");
   });
+  test.skip('DOES accept strings', () => {
+    expect(fibonacci("0")).toBe(0);
+  });
   test.skip('DOES accept strings', () => {
     expect(fibonacci("1")).toBe(1);
   });

10_fibonacci/solution/fibonacci-solution.js

@@ -1,6 +1,15 @@
-const fibonacci = function(count) {
+const fibonacci = function(countArg) {
+    // checks argument's type and makes sure we use 
+    // a number throughout rest of function.
+    let count
+    if (typeof countArg !== 'number') {
+        count = parseInt(countArg)
+    } else {
+        count = countArg
+    }
+
     if (count < 0) return "OOPS";
-    if (count === 0) return 0;
+    if (count == 0) return 0;
 
     let firstPrev = 1;
     let secondPrev = 0;
@@ -12,6 +21,14 @@ const fibonacci = function(count) {
     }
 
     return firstPrev;
+
 };
 
+// Another way to do it is by using an iterative approach with an array containing two values, 0 and 1.
+// const fib = [0, 1];
+// for (let i = 2; i <= count; i++) {
+//    fib[i] = fib[i - 1] + fib[i - 2];
+// }
+// return fib[count];
+
 module.exports = fibonacci;

10_fibonacci/solution/fibonacci-solution.spec.js

@@ -1,4 +1,4 @@
-const fibonacci = require('./fibonacci-solution');
+const fibonacci = require('./fibonacci-solution')
 
 describe('fibonacci', () => {
   test('4th fibonacci number is 3', () => {
@@ -16,19 +16,22 @@ describe('fibonacci', () => {
   test('25th fibonacci number is 75025', () => {
     expect(fibonacci(25)).toBe(75025);
   });
-  test('0th fibonacci number is o', () => {
+  test('0th fibonacci number is 0', () => {
     expect(fibonacci(0)).toBe(0);
   });
-  test("doesn't accept negatives", () => {
+  test('doesn\'t accept negatives', () => {
-    expect(fibonacci(-25)).toBe('OOPS');
+    expect(fibonacci(-25)).toBe("OOPS");
   });
   test('DOES accept strings', () => {
-    expect(fibonacci('1')).toBe(1);
+    expect(fibonacci("0")).toBe(0);
   });
   test('DOES accept strings', () => {
-    expect(fibonacci('2')).toBe(1);
+    expect(fibonacci("1")).toBe(1);
   });
   test('DOES accept strings', () => {
-    expect(fibonacci('8')).toBe(21);
+    expect(fibonacci("2")).toBe(1);
+  });
+  test('DOES accept strings', () => {
+    expect(fibonacci("8")).toBe(21);
   });
 });

package-lock.json

@@ -39,12 +39,12 @@
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     },
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+      "version": "7.22.10",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.13.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.10.tgz",
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       "dev": true,
       "dependencies": {
-        "@babel/highlight": "^7.22.13",
+        "@babel/highlight": "^7.22.10",
         "chalk": "^2.4.2"
       },
       "engines": {
@@ -177,12 +177,12 @@
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     },
     "node_modules/@babel/generator": {
-      "version": "7.23.0",
+      "version": "7.22.10",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.23.0.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.22.10.tgz",
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       "dev": true,
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-        "@babel/types": "^7.23.0",
+        "@babel/types": "^7.22.10",
         "@jridgewell/gen-mapping": "^0.3.2",
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         "jsesc": "^2.5.1"
@@ -217,22 +217,22 @@
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+      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.22.20.tgz",
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-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.23.0.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.22.5.tgz",
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       "dev": true,
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+        "@babel/template": "^7.22.5",
-        "@babel/types": "^7.23.0"
+        "@babel/types": "^7.22.5"
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         "node": ">=6.9.0"
@@ -324,9 +324,9 @@
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     },
     "node_modules/@babel/helper-validator-identifier": {
-      "version": "7.22.20",
+      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.20.tgz",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.5.tgz",
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@@ -356,12 +356,12 @@
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     "node_modules/@babel/highlight": {
-      "version": "7.22.20",
+      "version": "7.22.10",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.20.tgz",
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       "dev": true,
       "dependencies": {
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+        "@babel/helper-validator-identifier": "^7.22.5",
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       },
@@ -441,9 +441,9 @@
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-      "version": "7.23.0",
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-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.23.0.tgz",
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@@ -630,33 +630,33 @@
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+      "version": "7.22.5",
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+        "@babel/code-frame": "^7.22.5",
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       "dev": true,
       "dependencies": {
-        "@babel/code-frame": "^7.22.13",
+        "@babel/code-frame": "^7.22.10",
-        "@babel/generator": "^7.23.0",
+        "@babel/generator": "^7.22.10",
-        "@babel/helper-environment-visitor": "^7.22.20",
+        "@babel/helper-environment-visitor": "^7.22.5",
-        "@babel/helper-function-name": "^7.23.0",
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         "@babel/helper-hoist-variables": "^7.22.5",
         "@babel/helper-split-export-declaration": "^7.22.6",
-        "@babel/parser": "^7.23.0",
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@@ -674,13 +674,13 @@
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