samkahchiin

function convert(str) {
  // :)
  return str.replace(/&/g, "&amp;").replace(/>/g, "&gt;").replace(/</g, "&lt;").replace(/"/g, "&quot;").replace(/'/g,"&apos;");
}

convert("Dolce & Gabbana");

samkahchiin

function spinalCase(str) {

  return str.replace(/([a-z])([A-Z])/g, '$1 $2').toLowerCase().replace(/[_\s]/g,"-"); 

}


spinalCase("Teletubbies say Eh-oh");
spinalCase('thisIsSpinalTap');

samkahchiin

function sumFibs(num) {
  
  var i = 0;  
  var arr = [0,1];

  while(arr[i] + arr[i+1] <= num){
    arr.push(arr[i] + arr[i+1]);
    i++;
  }
    

samkahchiin

function sumPrimes(num) {
  var sum = 0;
  for(var i = 2; i <= num; i++){
    if(isPrime(i) === true){
      sum += i;
    }
  }
  return sum;
}

samkahchiin

function smallestCommons(arr) {
  return numInRange(arr).reduce(function(a,b){
    return lcm(a,b);    
  });   
}

function gcd (x, y) {
  return (x % y === 0) ? y : gcd(y, x % y);
}

samkahchiin

function find(arr, func) {
  return arr.filter(func).shift();
}

find([1, 2, 3, 4], function(num){ return num % 2 === 0; });

samkahchiin

function drop(arr, func) {

  var first_elem = arr.filter(func).shift();
  return (first_elem === undefined) ? [] : arr.slice(arr.indexOf(first_elem));

}

drop([1, 2, 3, 4], function(n) {return n > 5;});
drop([1, 2, 3], function(n) {return n < 3; });

samkahchiin

function steamroller(arr) {
  return flatten(arr);
}

function flatten(arr) { 
  return arr.reduce(function(flat,toBeFlatten){
    return flat.concat(Array.isArray(toBeFlatten) ? flatten(toBeFlatten) : toBeFlatten);
  }, []);
}

samkahchiin

function binaryAgent(str) {
  var new_str = str.split(" ").map(function(x){
    return String.fromCharCode(parseInt(x,2));
  });
  
  return new_str.join("");
}

binaryAgent("01000001 01110010 01100101 01101110 00100111 01110100 00100000 01100010 01101111 01101110 01100110 01101001 01110010 01100101 01110011 00100000 01100110 01110101 01101110 00100001 00111111");

samkahchiin

function every(collection, pre) {
  for(var x in collection){
    if(collection[x].hasOwnProperty(pre)){
      if(!collection[x][pre]){
        return false;
      }
    }else{
      return false;
    }
  }