DEEP LOOPING IN ARRAYS

FIZZBUZZ v2.0

var FizzBuzzPlus = {

isFizzBuzzie: function(value)

{

if (value%5===0&&value%3===0)

{

return false;

}

else if (value%5===0||value%3===0)

{

return true;

}

else

{

return false;

}

},

getFizzBuzzSum: function(value){

var total=0;

for (i=0;i<value;i++)

{

if(this.isFizzBuzzie(i))

{

total +=i;

}

}

return total;

},

getFizzBuzzCount: function(value){

var count=0;

for (i=0;i<value;i++)

{

if(this.isFizzBuzzie(i))

{

count++;

}

}

return count;

},

getFizzBuzzAverage: function(value){

var average = this.getFizzBuzzSum(value)/this.getFizzBuzzCount(value);

return average;

}

};

console.log(FizzBuzzPlus.getFizzBuzzAverage(100));

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Instanceof

Проверка есть ли один объект образцом другого. Тоесть используется ли команда .prototype

console.log(myElectricCar instanceof Car);

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We call String a JavaScript built-in object.

var str1 = new String("Hello!");

• BUILT-IN MATH METHODS
• Math.pow(num1, num2) takes num1 and takes it to the num2-th power. It returns the result of the exponentiation.
• Math.max(num1, num2) takes two (or more!) numbers and returns the one with the largest value.

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REMOVING ITEMS FROM ARRAY(.splice)

The splice method takes 2 arguments: the index position to start at, and the number of items to remove.

So if you want to remove the first item from an array, you would type:
myArray.splice(0,1)

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COPYING ARRAY AND ITEMS(.slice)

var b = a.slice(); или часть массива var b = a.slice(1,3);

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DEEP LOOPING IN ARRAYS

//Your three dimensional array from the last exercise probably

//looked something like this:

var hands = [];

hands[0] = [ [3,"H"], ["A","S"], [1,"D"], ["J","H"], ["Q","D"] ];

hands[1] = [ [9,"C"], [6,"C"], ["K","H"], [3,"C"], ["K","H"] ];

//Loop over every dimension in the array, logging out the suit and rank

//of each card in both hands

//1. loop over each hand

for (i=0;i<hands.length;i++) {

//2. loop over each card array in each hand

for (j=0;j<hands[i].length;j++) {

//3. loop over each rank/suit array for each card in each hand

for (k=0;k<hands[i][j].length;k++) {

//4. log the value of the rank/suit array item

console.log(hands[i][j][k]);

}

}

}

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