Nodejs Array Unique uniq()

Here you can find the source of uniq()

Method Source Code

Array.prototype.uniq = function(){
  var uniqArray = [];
  for (var i = 0; i < this.length; i++){
    if (uniqArray.indexOf(this[i]) === -1)
    {/*from ww w .j a  v a2s .c  o  m*/
      uniqArray.push(this[i])
    }
  }
  return uniqArray
};

console.log([1,2,2,3,2,54].uniq())

Array.prototype.twoSum = function(){
  var out = []
  for (var i = 0; i < (this.length-1); i++){
    for (var j = i+1; j < this.length; j++){
      if (this[i] + this[j] === 0)
      {
        out.push([i, j])
      }
    }
  }
  return out;
}

console.log([-1, 0, 2, -2, 1].twoSum())


Array.prototype.myTranspose = function(){
  var out = [];
  for (var row = 0; row < this.length; row++){
    var thisout = [];
    for (var col = 0; col < this.length; col++){
      thisout.push(this[col][row]);
    }
    out.push(thisout);
  }
  return out;
}

console.log([[0, 1, 2], [3, 4, 5], [6, 7, 8]].myTranspose())

// module.exports =

Related

  1. uniq()
    Array.prototype.uniq = function() {
      var results = [];
      for (var i = 0, len = this.length; i < len; i++) {
        var found = false;
        for (var j = 0, len2 = results.length; j < len2; j++) {
          if (this[i] === results[j]) {
            found = true;
            break;
        if (!found) {
          results.push(this[i]);
      return results;
    };
    Array.prototype.uniq = function() {
      var results = [];
      for (var i = 0, len = this.length; i < len; i++) {
        if (results.indexOf(this[i]) < 0) {
          results.push(this[i]);
      return results;
    };
    Array.prototype.uniq = function(sorted) {
      return this.inject([], function(array, value, index) {
        if (0 == index || (sorted ? array.last() != value : !array.include(value))) {
          array.push(value);
        return array;
      });
    };
    
  2. uniq()
    Array.prototype.uniq = function () {
      var occurrenceHash = {};
      var result = [];
      for (var i = 0; i < this.length; i++) {
        if (!occurrenceHash[this[i]]) {
            occurrenceHash[this[i]] = true;
            result.push(this[i]);
      return result;
    
  3. uniq()
    Array.prototype.uniq = function () {
      var results = [];
      for (var i = 0; i < this.length; i++) {
        var includes = false;
        for (var j = 0; j < results.length; j++) {
          if (results[j] === this[i]) {
            includes = true;
        };
    ...
    
  4. uniq()
    Array.prototype.uniq = function ()
      var dups = [];
      for (var i = 0; i < this.length; i++)
        var flag = true;
        for (var j = 0; j < dups.length; j++)
          if (this[i] === dups[j])
    ...
    
  5. uniq()
    Array.prototype.uniq = function () {
        var flag = false;
        var result = [];
        for(var i=0;i<this.length;i++) {
            if(result.indexOf(this[i]) == -1) {
                if(this[i]==this[i]) {
                    result.push(this[i]);
                else if(!flag) {
    ...
    
  6. uniq()
    Array.prototype.uniq = function() {  
        var temp = {};
        for(var i=0; i<this.length; i++)  {  
                temp[this[i]] = 1;
        this.length = 0;
        for(var e in temp) {  
            this.push(e);
        this.sort()
        return this;  
    function xmlencode(string) {
        return string.replace(/\&/g,'&'+'amp;').replace(/</g,'&'+'lt;')
            .replace(/>/g,'&'+'gt;').replace(/\'/g,'&'+'apos;').replace(/\"/g,'&'+'quot;');
    
  7. uniq()
    Array.prototype.uniq = function () {
      var uniq_arr = [];
      for (var i = 0; i < this.length; i++) {
        var included = false;
        for (var j = 0; j < uniq_arr.length; j++) {
          if (uniq_arr[j] === this[i]) {
            included = true;
            break;
          };
    ...
    
  8. uniq()
    Array.prototype.uniq = function() {
      let res = [];
      for(let i=0; i < this.length; i++) {
        let value = this[i];
        if (!res.includes(value)) res.push(value);
      return res;
    };
    console.log([1,2,2,1,1,3].uniq());
    ...
    
  9. uniq()
    Array.prototype.uniq = function () {
      var uniqueArray = [];
      for (var i = 0; i < this.length; i++) {
        if (uniqueArray.indexOf(this[i]) === -1) {
          uniqueArray.push(this[i]);
      return uniqueArray;
    };
    ...