Nodejs Array Find find(searchStr)

Here you can find the source of find(searchStr)

Method Source Code

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Array.prototype.find = function(searchStr) {
  for (i=0; i<this.length; i++) {
      if (this[i]===searchStr) {
      return true;
    }//from  w w  w .j  ava  2  s  . c o m
  }
  return false;
}

Related

  1. find(id)
    Array.prototype.find = function(id) {
      return this.filter(function(a) {
        if ( a.id == id ) {
          return a;
      }).first();
    
  2. find(isOk)
    const array = [1, 42, 7, 9, 13, 10, 20, 35, 45, -7, -3, 0, 4, -1, 15];
    Array.prototype.find = function(isOk) {
      const len = this.length;
      for(let i = 0; i < len; i += 1) {
        if(isOk(this[i], i, this)) {
          return this[i];
    Array.prototype.findIndex = function(isOk) {
      const len = this.length;
      for(let i = 0; i < len; i += 1) {
        if(isOk(this[i], i, this)) {
          return i;
      return -1;
    console.log(array.find(x => x % 2 === 0));
    console.log(array.find(x => x % 2 === 1));
    console.log(array.find(x => x > 10 && x < 20));
    console.log(array.find(x => x === 45));
    console.log(array.find(x => x === 46));
    console.log(array.findIndex(x => x % 2 === 0));
    console.log(array.findIndex(x => x % 2 === 1));
    console.log(array.findIndex(x => x > 10 && x < 20));
    console.log(array.findIndex(x => x === 45));
    console.log(array.findIndex(x => x === 46));
    
  3. find(predicate)
    Array.prototype.find = function(predicate) {
        if (this == null) {
            throw new TypeError('Array.prototype.find called on null or undefined');
        if (typeof predicate !== 'function') {
            throw new TypeError('predicate must be a function');
        var list = Object(this);
        var length = list.length >>> 0;
    ...
    
  4. find(predicate)
    Array.prototype.find = function(predicate){
        var list = Object(this);
        var length = list.length >>> 0;
        var thisArg = arguments[1];
        var value;
        for (var i = 0; i < length; i++) {
            value = list[i];
            if (predicate.call(thisArg, value, i, list)) {
                return value;
    ...
    
  5. find(predicateFn)
    Array.prototype.find = function (predicateFn) {
      for (var i = 0; i < this.length; i++) {
        if ( predicateFn(this[i]) ) return this[i]
      return null
    
  6. find(searchStr)
    Array.prototype.find = function(searchStr) {
      var returnArray = false;
      for (i=0; i<this.length; i++) {
        if (typeof(searchStr) == 'function') {
          if (searchStr.test(this[i])) {
            if (!returnArray) { returnArray = [] }
            returnArray.push(i);
        } else {
    ...
    
  7. find(value)
    Array.prototype.find = function(value)
        for (var i = 0; i < this.length; i++)
            if (this[i] === value)
                return i;
        return false;
    function log(msg)
      console.log(msg);
    
  8. find(value)
    Array.prototype.find = function (value) {
      var found = -1;
      for (var i = 0; i < this.length; i++) {
        if (this[i] == value) {
          found = i;
      return found;
    };
    ...
    
  9. find(what)
    function find(what, where)
      for(var i=0; i<where.length;i++)
        if(where[i] == what) return i;
      return -1;
    function NumCompare(a,b)
    ...