[WIP] Segment-1

__test__/daysInMonth.test.js

@@ -3,6 +3,6 @@ const { countDaysInMonth } = require('../src/daysInMonth');
 describe('countDaysInMonth', () => {
   test('should return correct number of days', () => {
     expect(countDaysInMonth(2014, 4)).toBe(30);
-    expect(countDaysInMonth(2016, 1)).toBe(29);
+    expect(countDaysInMonth(2016, 2)).toBe(29);
   });
 });

src/boolean.js

@@ -4,6 +4,7 @@
 
 // Return a boolean
 
-const a = 5;
+const a = Boolean(5);
 
 module.exports = a;
+

src/daysInMonth.js

@@ -4,7 +4,26 @@
 // countDaysInMonth(2016, 8); //=> 30
 
 function countDaysInMonth(year, month) {
-  return year + month;
+  let leap = false;
+
+  let days;
+  if (year % 4 === 0) {
+    leap = true;
+  }
+
+  if (month === 1 || month === 3 || month === 5 || month === 7 || month === 8 ||
+    month === 10 || month === 12) {
+    days = 31;
+  } else if (month === 2) {
+    if (leap) {
+      days = 29;
+    } else {
+      days = 28;
+    }
+  } else {
+    days = 30;
+  }
+  return days;
 }
 
 module.exports = { countDaysInMonth };

src/invertKeyValue.js

@@ -1,8 +1,14 @@
 // invertKv({foo: 'bar', unicorn: 'rainbow'});
 // => {bar: 'foo', rainbow: 'unicorn'}
 
-function invertKeyValue() {
-
+function invertKeyValue(obj) {
+  let obj2 = {};
+  obj2 = Object.keys(obj).reduce((acc, key) => {
+    acc[obj[key]] = key;
+    return acc;
+  }, {});
+  return obj2;
 }
 
 module.exports = invertKeyValue;
+

src/lowercaseKeys.js

@@ -1,8 +1,15 @@
 // lowercaseKeys({FOO: true, bAr: false});
 // => { foo: true, bar: false }
 
-function lowercaseKeys() {
-
+function lowercaseKeys(obj) {
+  let obj2 = {};
+  let key2;
+  obj2 = Object.keys(obj).reduce((acc, key) => {
+    key2 = key.toLocaleLowerCase();
+    acc[key2] = obj[key];
+    return acc;
+  }, {});
+  return obj2;
 }
 
 module.exports = lowercaseKeys;