fitfab/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
// String exercises

// Palindrome
function isPalind(str) {
  return str.split('').reverse().join('').toLowerCase() === str.toLowerCase();
}

console.log('Palindrome? level ' + isPalind('level'));
console.log('Palindrome? Rotator ', isPalind('Rotator'));

// count how chars in a gibing string
function countChar(char, str) {
  var count = 0;
  for(var i=0; i<str.length; i++) {
    if(str[i] == char) {
      count++;
    }
  }
  return count;
}

console.log('how many occurence of a in banana? ' + countChar('a','banana'));


// duplicate item in array

function findDuplicate(arr) {
  var dictionary = {};
  var dup = [];
  for(var i=0; i<arr.length;i++) {
    if(!dictionary[arr[i]]) {
      dictionary[arr[i]] = 1;
    } else {
      dup.push(arr[i]);
    }
  }

  return dup;
}

console.log(findDuplicate(['c', 2, 3, 4, 5, 3, 'c',3,'c']));

// Recursion
function countDown(start){
  if (start === 0) {
    return;
  }
  console.log(start);
  countDown(start-1);
}

countDown(7);

var categories = [
  {id:'animal', parent: null},
  {id:'mamal', parent: 'animal'},
  {id:'cat', parent: 'mamal'},
  {id:'dog', parent: 'mamal'},
  {id:'chihuaha', parent: 'dog'},
  {id:'German Sheper', parent: 'dog'},
  {id:'Siamese', parent: 'cat'},
  {id:'Persian', parent: 'cat'}
];

function makeTree(cat, parent) {
  var node = {};

  cat.filter(c => c.parent === parent)
    .forEach(s => node[s.id] = makeTree(cat, s.id));

  return node;
}


console.log(
    JSON.stringify(
      makeTree(categories, null),
      null,
      2
    )
);
</script>


<script id="jsbin-source-javascript" type="text/javascript">// String exercises

// Palindrome
function isPalind(str) {
  return str.split('').reverse().join('').toLowerCase() === str.toLowerCase();
}

console.log('Palindrome? level ' + isPalind('level'));
console.log('Palindrome? Rotator ', isPalind('Rotator'));

// count how chars in a gibing string
function countChar(char, str) {
  var count = 0;
  for(var i=0; i<str.length; i++) {
    if(str[i] == char) {
      count++;
    }
  }
  return count;
}

console.log('how many occurence of a in banana? ' + countChar('a','banana'));


// duplicate item in array

function findDuplicate(arr) {
  var dictionary = {};
  var dup = [];
  for(var i=0; i<arr.length;i++) {
    if(!dictionary[arr[i]]) {
      dictionary[arr[i]] = 1;
    } else {
      dup.push(arr[i]);
    }
  }

  return dup;
}

console.log(findDuplicate(['c', 2, 3, 4, 5, 3, 'c',3,'c']));

// Recursion
function countDown(start){
  if (start === 0) {
    return;
  }
  console.log(start);
  countDown(start-1);
}

countDown(7);

var categories = [
  {id:'animal', parent: null},
  {id:'mamal', parent: 'animal'},
  {id:'cat', parent: 'mamal'},
  {id:'dog', parent: 'mamal'},
  {id:'chihuaha', parent: 'dog'},
  {id:'German Sheper', parent: 'dog'},
  {id:'Siamese', parent: 'cat'},
  {id:'Persian', parent: 'cat'}
];

function makeTree(cat, parent) {
  var node = {};

  cat.filter(c => c.parent === parent)
    .forEach(s => node[s.id] = makeTree(cat, s.id));

  return node;
}


console.log(
    JSON.stringify(
      makeTree(categories, null),
      null,
      2
    )
);</script></body>
</html>

## jsbin.lesoce.js
// String exercises

// Palindrome
function isPalind(str) {
  return str.split('').reverse().join('').toLowerCase() === str.toLowerCase();
}

console.log('Palindrome? level ' + isPalind('level'));
console.log('Palindrome? Rotator ', isPalind('Rotator'));

// count how chars in a gibing string
function countChar(char, str) {
  var count = 0;
  for(var i=0; i<str.length; i++) {
    if(str[i] == char) {
      count++;
    }
  }
  return count;
}

console.log('how many occurence of a in banana? ' + countChar('a','banana'));


// duplicate item in array

function findDuplicate(arr) {
  var dictionary = {};
  var dup = [];
  for(var i=0; i<arr.length;i++) {
    if(!dictionary[arr[i]]) {
      dictionary[arr[i]] = 1;
    } else {
      dup.push(arr[i]);
    }
  }

  return dup;
}

console.log(findDuplicate(['c', 2, 3, 4, 5, 3, 'c',3,'c']));

// Recursion
function countDown(start){
  if (start === 0) {
    return;
  }
  console.log(start);
  countDown(start-1);
}

countDown(7);

var categories = [
  {id:'animal', parent: null},
  {id:'mamal', parent: 'animal'},
  {id:'cat', parent: 'mamal'},
  {id:'dog', parent: 'mamal'},
  {id:'chihuaha', parent: 'dog'},
  {id:'German Sheper', parent: 'dog'},
  {id:'Siamese', parent: 'cat'},
  {id:'Persian', parent: 'cat'}
];

function makeTree(cat, parent) {
  var node = {};

  cat.filter(c => c.parent === parent)
    .forEach(s => node[s.id] = makeTree(cat, s.id));

  return node;
}


console.log(
    JSON.stringify(
      makeTree(categories, null),
      null,
      2
    )
);
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	</head>
	<body>

	<script id="jsbin-javascript">
	// String exercises

	// Palindrome
	function isPalind(str) {
	return str.split('').reverse().join('').toLowerCase() === str.toLowerCase();
	}

	console.log('Palindrome? level ' + isPalind('level'));
	console.log('Palindrome? Rotator ', isPalind('Rotator'));

	// count how chars in a gibing string
	function countChar(char, str) {
	var count = 0;
	for(var i=0; i<str.length; i++) {
	if(str[i] == char) {
	count++;
	}
	}
	return count;
	}

	console.log('how many occurence of a in banana? ' + countChar('a','banana'));


	// duplicate item in array

	function findDuplicate(arr) {
	var dictionary = {};
	var dup = [];
	for(var i=0; i<arr.length;i++) {
	if(!dictionary[arr[i]]) {
	dictionary[arr[i]] = 1;
	} else {
	dup.push(arr[i]);
	}
	}

	return dup;
	}

	console.log(findDuplicate(['c', 2, 3, 4, 5, 3, 'c',3,'c']));

	// Recursion
	function countDown(start){
	if (start === 0) {
	return;
	}
	console.log(start);
	countDown(start-1);
	}

	countDown(7);

	var categories = [
	{id:'animal', parent: null},
	{id:'mamal', parent: 'animal'},
	{id:'cat', parent: 'mamal'},
	{id:'dog', parent: 'mamal'},
	{id:'chihuaha', parent: 'dog'},
	{id:'German Sheper', parent: 'dog'},
	{id:'Siamese', parent: 'cat'},
	{id:'Persian', parent: 'cat'}
	];

	function makeTree(cat, parent) {
	var node = {};

	cat.filter(c => c.parent === parent)
	.forEach(s => node[s.id] = makeTree(cat, s.id));

	return node;
	}


	console.log(
	JSON.stringify(
	makeTree(categories, null),
	null,
	2
	)
	);
	</script>



	<script id="jsbin-source-javascript" type="text/javascript">// String exercises

	// Palindrome
	function isPalind(str) {
	return str.split('').reverse().join('').toLowerCase() === str.toLowerCase();
	}

	console.log('Palindrome? level ' + isPalind('level'));
	console.log('Palindrome? Rotator ', isPalind('Rotator'));

	// count how chars in a gibing string
	function countChar(char, str) {
	var count = 0;
	for(var i=0; i<str.length; i++) {
	if(str[i] == char) {
	count++;
	}
	}
	return count;
	}

	console.log('how many occurence of a in banana? ' + countChar('a','banana'));


	// duplicate item in array

	function findDuplicate(arr) {
	var dictionary = {};
	var dup = [];
	for(var i=0; i<arr.length;i++) {
	if(!dictionary[arr[i]]) {
	dictionary[arr[i]] = 1;
	} else {
	dup.push(arr[i]);
	}
	}

	return dup;
	}

	console.log(findDuplicate(['c', 2, 3, 4, 5, 3, 'c',3,'c']));

	// Recursion
	function countDown(start){
	if (start === 0) {
	return;
	}
	console.log(start);
	countDown(start-1);
	}

	countDown(7);

	var categories = [
	{id:'animal', parent: null},
	{id:'mamal', parent: 'animal'},
	{id:'cat', parent: 'mamal'},
	{id:'dog', parent: 'mamal'},
	{id:'chihuaha', parent: 'dog'},
	{id:'German Sheper', parent: 'dog'},
	{id:'Siamese', parent: 'cat'},
	{id:'Persian', parent: 'cat'}
	];

	function makeTree(cat, parent) {
	var node = {};

	cat.filter(c => c.parent === parent)
	.forEach(s => node[s.id] = makeTree(cat, s.id));

	return node;
	}


	console.log(
	JSON.stringify(
	makeTree(categories, null),
	null,
	2
	)
	);</script></body>
	</html>