update snippets 62-78

snippets/JSONToDate.md

@@ -9,5 +9,8 @@ const JSONToDate = arr => {
   const dt = new Date(parseInt(arr.toString().substr(6)));
   return `${dt.getDate()}/${dt.getMonth() + 1}/${dt.getFullYear()}`;
 };
-// JSONToDate(/Date(1489525200000)/) -> "14/3/2017"
+```
+
+```js
+JSONToDate(/Date(1489525200000)/) -> "14/3/2017"
 ```

snippets/inRange.md

@@ -1,17 +1,20 @@
 ### inRange
 
-Checks if the given number falls within the given range. 
+Checks if the given number falls within the given range.
 
 Use arithmetic comparison to check if the given number is in the specified range.
 If the second parameter, `end`, is not specified, the range is considered to be from `0` to `start`.
 
 ```js
-const inRange = (n, start, end = null) => {
-  if (end && start > end) end = [start, start = end][0];
-  return (end == null) ? (n >= 0 && n < start) : (n >= start && n < end);
-};
-// inRange(3, 2, 5) -> true
-// inRange(3, 4) -> true
-// inRange(2, 3, 5) -> false
-// inrange(3, 2) -> false
+const inRange = (n, start, end=null) => {
+  if(end && start > end) end = [start, start=end][0];
+  return (end == null) ? (n>=0 && n<start) : (n>=start && n<end);
+}
+```
+
+```js
+inRange(3, 2, 5) // true
+inRange(3, 4) // true
+inRange(2, 3, 5) // false
+inrange(3, 2) // false
 ```

snippets/initialize2DArray.md

@@ -9,5 +9,5 @@ const initialize2DArray = (w, h, val = null) => Array(h).fill().map(() => Array(
 ```
 
 ```js
-initializeArrayWithRange(2, 2, 0) -> [[0,0], [0,0]]
+initialize2DArray(2, 2, 0) -> [[0,0], [0,0]]
 ```

snippets/initializeArrayWithRange.md

@@ -8,6 +8,9 @@ You can omit `start` to use a default value of `0`.
 ```js
 const initializeArrayWithRange = (end, start = 0) =>
   Array.from({ length: (end + 1) - start }).map((v, i) => i + start);
-// initializeArrayWithRange(5) -> [0,1,2,3,4,5]
-// initializeArrayWithRange(7, 3) -> [3,4,5,6,7]
+```
+
+```js
+initializeArrayWithRange(5) -> [0,1,2,3,4,5]
+initializeArrayWithRange(7, 3) -> [3,4,5,6,7]
 ```

snippets/initializeArrayWithValues.md

@@ -7,5 +7,8 @@ You can omit `value` to use a default value of `0`.
 
 ```js
 const initializeArrayWithValues = (n, value = 0) => Array(n).fill(value);
-// initializeArrayWithValues(5, 2) -> [2,2,2,2,2]
+```
+
+```js
+initializeArrayWithValues(5, 2) -> [2,2,2,2,2]
 ```

snippets/intersection.md

@@ -6,5 +6,8 @@ Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values co
 
 ```js
 const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.has(x)); };
-// intersection([1,2,3], [4,3,2]) -> [2,3]
+```
+
+```js
+intersection([1,2,3], [4,3,2]) -> [2,3]
 ```

snippets/isArmstrongNumber.md

@@ -6,8 +6,11 @@ Convert the given number into an array of digits. Use `Math.pow()` to get the ap
 
 ```js
 const isArmstrongNumber = digits =>
-  (arr => arr.reduce((a, d) => a + Math.pow(parseInt(d), arr.length), 0) == digits)((digits + '').split(''));
-// isArmstrongNumber(1634) -> true
-// isArmstrongNumber(371) -> true
-// isArmstrongNumber(56) -> false
+  ( arr => arr.reduce( ( a, d ) => a + Math.pow( parseInt( d ), arr.length ), 0 ) == digits ? true : false )( ( digits+'' ).split( '' ) );
+```
+
+```js
+isArmstrongNumber(1634) // true
+isArmstrongNumber(371) // true
+isArmstrongNumber(56) // false
 ```

snippets/isArray.md

@@ -6,6 +6,9 @@ Use `Array.isArray()` to check if a value is classified as an array.
 
 ```js
 const isArray = val => !!val && Array.isArray(val);
-// isArray(null) -> false
-// isArray([1]) -> true
+```
+
+```js
+isArray(null) -> false
+isArray([1]) -> true
 ```

snippets/isBoolean.md

@@ -6,6 +6,9 @@ Use `typeof` to check if a value is classified as a boolean primitive.
 
 ```js
 const isBoolean = val => typeof val === 'boolean';
-// isBoolean(null) -> false
-// isBoolean(false) -> true
+```
+
+```js
+isBoolean(null) -> false
+isBoolean(false) -> true
 ```

snippets/isDivisible.md

@@ -6,5 +6,8 @@ Use the modulo operator (`%`) to check if the remainder is equal to `0`.
 
 ```js
 const isDivisible = (dividend, divisor) => dividend % divisor === 0;
-// isDivisible(6,3) -> true
+```
+
+```js
+isDivisible(6,3) -> true
 ```

snippets/isEven.md

@@ -7,5 +7,8 @@ Returns `true` if the number is even, `false` if the number is odd.
 
 ```js
 const isEven = num => num % 2 === 0;
-// isEven(3) -> false
+```
+
+```js
+isEven(3) -> false
 ```

snippets/isFunction.md

@@ -6,6 +6,9 @@ Use `typeof` to check if a value is classified as a function primitive.
 
 ```js
 const isFunction = val => val && typeof val === 'function';
-// isFunction('x') -> false
-// isFunction(x => x) -> true
+```
+
+```js
+isFunction('x') -> false
+isFunction(x => x) -> true
 ```

snippets/isNumber.md

@@ -6,6 +6,9 @@ Use `typeof` to check if a value is classified as a number primitive.
 
 ```js
 const isNumber = val => typeof val === 'number';
-// isNumber('1') -> false
-// isNumber(1) -> true
 ```
+
+```js
+isNumber('1') -> false
+isNumber(1) -> true
+```

snippets/isPrime.md

@@ -2,7 +2,7 @@
 
 Checks if the provided integer is a prime number.
 
-Check numbers from `2` to the square root of the given number. 
+Check numbers from `2` to the square root of the given number.
 Return `false` if any of them divides the given number, else return `true`, unless the number is less than `2`.
 
 ```js
@@ -11,6 +11,9 @@ const isPrime = num => {
   for (var i = 2; i * i <= boundary; i++) if (num % i == 0) return false;
   return num >= 2;
 };
-// isPrime(11) -> true
-// isPrime(12) -> false
+```
+
+```js
+isPrime(11) -> true
+isPrime(12) -> false
 ```

snippets/isString.md

@@ -6,6 +6,9 @@ Use `typeof` to check if a value is classified as a string primitive.
 
 ```js
 const isString = val => typeof val === 'string';
-// isString(10) -> false
-// isString('10') -> true
+```
+
+```js
+isString(10) -> false
+isString('10') -> true
 ```

snippets/isSymbol.md

@@ -6,6 +6,9 @@ Use `typeof` to check if a value is classified as a symbol primitive.
 
 ```js
 const isSymbol = val => typeof val === 'symbol';
-// isSymbol('x') -> false
-// isSymbol(Symbol('x')) -> true
+```
+
+```js
+isSymbol('x') -> false
+isSymbol(Symbol('x')) -> true
 ```