Day 36 – ITP1 Search Patterns

Posted on September 22, 2023 by Rose 
var numArray = [81,29,74,99,2,82,55,92,61,67,88,67,18,13,21,52,19,94,32,24,28,59,33,71,41,95,91,50,99,23,21,46,81,4,78,46,93,38,22,75,67,6,19,74,67,59,70,36,57,47,48,97,48,28,90,15,50,74,49,93,37,73,52,76,75,96,71,58,69,90,58,52,34,88,85,1,91,87,70,95,50,32,39,39,49,5,36,10,70,4,77,40,18,46,46,72,91,52,99,82,78,33,21,73,6,25,86,82,92,17,99,31,15,77,44,14,60,63,45,96,35,24,12,81,11,55,7,90,73,47,35,25,19,56,12,5,68,40,2,66,58,92,19,72,72,81,89,69,41,99,45,86,80,51,36,15,34,88,67,62,82,39,96,89,26,98,89,32,55,81,12,22,15,34,87,67,99,29,24,32,9,32,67,11,13,45,1,46,78,13,17,48,90,97,47,63,93,63,38,81,80,67,80,69,38,87,46,80,73,63,70,86,25,54,86,90,68,100,50,21,91,53,16,98,45,65,57,31,70,20,21,46,94,78,87,58,65,8,3,54,46,41,88,80,53,50,40,73,54,15,62,17,93,6,50,67,97,19,40,15,16,28,1,56,18,42,32,18,84,3,4,93,42,9,67,24,11,91,26,8,89,43,52,93,65,48,71,44,16,69,61,2,56,18,95,23,1,40,42,66,50,5,46,63,80,46,3,18,17,60,91,43,96,53,16,4,34,81,98,35,37,63,89,60,69,54,12,54,45,7,67,36,45,17,54,58,97,30,2,21,47,9,98,32,11,34,83,87,47,85,37,98,42,50,42,71,98,87,76,58,78,57,71,6,94,64,67,65,31,9,78,20,13,51,44,70,94,85,74,85,10,69,1,41,46,22,30,67,70,89,97,40,91,40,32,61,75,39,66,79,98,25,95,12,27,40,41,75,94,75,81,34,93,65,9,73,90,38,80,27,11,92,89,40,8,10,91,54,73,49,88,79,41,46,79,48,11,48,92,65,24,51,65,78,18,79,48,18,16,78,3,87,44,29,16,41,18,38,81,47,58,43,51,10,81,36,79,29,65,30,60,6,74,33,97,55,78,11,55,93,15,38,45,49,88,40,82,59,76,15,1,94,57,50,50,63,55,76,85,7,14,53,65,33,78,79,43,55,34,27,37,11,94,52,11,32,23,49,31,57,20,22,33,56,2,30,78,84,99,22,93,78,64,2,39,92,32,12,57,36,37,71,88,36,37,72,40,4,69,85,38,54,68,19,29,12,54,83,32,100,87,14,71,51,38,27,8,49,22,38,81,86,49,20,73,4,34,47,41,17,5,6,13,26,46,95,26,80,59,26,83,57,12,42,92,1,31,47,27,33,24,90,17,56,9,61,77,90,22,68,26,18,86,81,72,51,15,93,13,41,35,2,73,15,50,79,50,7,39,26,95,94,48,46,88,82,75,7,98,68,52,85,88,94,70,60,0,90,84,57,42,37,56,91,5,0,45,86,11,57,19,21,48,45,76,48,46,47,33,69,63,61,41,71,62,81,63,66,61,97,29,20,64,5,67,52,15,20,37,33,3,31,26,39,83,68,11,54,13,86,61,94,4,67,19,4,2,64,59,35,50,18,97,64,93,69,53,75,74,37,38,93,85,43,14,14,93,68,35,63,55,80,62,74,39,19,19,65,55,18,1,78,10,13,74,78,40,97,36,46,53,98,59,64,28,30,34,66,58,93,51,64,65,77,46,13,12,79,20,14,76,22,38,98,96,64,19,59,97,86,50,11,84,4,70,62,81,48,42,57,3,3,77,96,28,15,64,56,49,83,82,25,13,57,85,69,62,51,89,23,91,90,92,89,97,23,70,83,76,2,62,13,76,46,9,75,87,40,100,37,46,82,32,20,19,100,31,87,87,10,32,24,26,51,89,50,60,67,12,98,9,25,12,20,92,7,15,65,43,1,14,90,92,64,22,68,31,68,82,40,36,61,84,39,93,34,69,73,52,84,46,53,89,10,31,5,6,66,60,65,75,68,64,27,37,39,75,65,88,68,98,9,56,54,53,65,46,63,5,57,15,48,4,39,4,61,60,72,23,58,65,14,75,92,14,86,64,27,91,66,31,66,54,24,4,34,47,89,65,93,97,3,0,50,3,83,78,81,93,37,15,72,92,68,66,20,11,66,19,78,93,28,52,4,87,72,36,52,25,76,98,94,68,51,37,82,95,62,82,69,93,67,39,88,35,22,28,51,80,99,12,33,68,42,37,11,85,23,37,54];

function setup()
{
   //find the first number 42
    var meaningOfLife = 0;
    for(var i = 0; i < numArray.length; i++)
    {
        if(numArray[i] == 42)//finds all the placements with the value 42
        {
            console.log("found the meaning at index " + i);//all the placements with the value 42
            meaningOfLife = i;
        }
    }
    console.log("the meaning of life is at index " + meaningOfLife)
}

In the example below, the for loop code returns all the placement index with the value 42 - 265, 272, and so on. And the final value returns the last index 993.

But we’re looking for the first index, so we will be using a mechanism that will skip out the for loop once we already found the answer.

break; a code that will stop the code from running once done, and stops the loop

var numArray = [81,29,74,99,2,82,55,92,61,67,88,67,18,13,21,52,19,94,32,24,28,59,33,71,41,95,91,50,99,23,21,46,81,4,78,46,93,38,22,75,67,6,19,74,67,59,70,36,57,47,48,97,48,28,90,15,50,74,49,93,37,73,52,76,75,96,71,58,69,90,58,52,34,88,85,1,91,87,70,95,50,32,39,39,49,5,36,10,70,4,77,40,18,46,46,72,91,52,99,82,78,33,21,73,6,25,86,82,92,17,99,31,15,77,44,14,60,63,45,96,35,24,12,81,11,55,7,90,73,47,35,25,19,56,12,5,68,40,2,66,58,92,19,72,72,81,89,69,41,99,45,86,80,51,36,15,34,88,67,62,82,39,96,89,26,98,89,32,55,81,12,22,15,34,87,67,99,29,24,32,9,32,67,11,13,45,1,46,78,13,17,48,90,97,47,63,93,63,38,81,80,67,80,69,38,87,46,80,73,63,70,86,25,54,86,90,68,100,50,21,91,53,16,98,45,65,57,31,70,20,21,46,94,78,87,58,65,8,3,54,46,41,88,80,53,50,40,73,54,15,62,17,93,6,50,67,97,19,40,15,16,28,1,56,18,42,32,18,84,3,4,93,42,9,67,24,11,91,26,8,89,43,52,93,65,48,71,44,16,69,61,2,56,18,95,23,1,40,42,66,50,5,46,63,80,46,3,18,17,60,91,43,96,53,16,4,34,81,98,35,37,63,89,60,69,54,12,54,45,7,67,36,45,17,54,58,97,30,2,21,47,9,98,32,11,34,83,87,47,85,37,98,42,50,42,71,98,87,76,58,78,57,71,6,94,64,67,65,31,9,78,20,13,51,44,70,94,85,74,85,10,69,1,41,46,22,30,67,70,89,97,40,91,40,32,61,75,39,66,79,98,25,95,12,27,40,41,75,94,75,81,34,93,65,9,73,90,38,80,27,11,92,89,40,8,10,91,54,73,49,88,79,41,46,79,48,11,48,92,65,24,51,65,78,18,79,48,18,16,78,3,87,44,29,16,41,18,38,81,47,58,43,51,10,81,36,79,29,65,30,60,6,74,33,97,55,78,11,55,93,15,38,45,49,88,40,82,59,76,15,1,94,57,50,50,63,55,76,85,7,14,53,65,33,78,79,43,55,34,27,37,11,94,52,11,32,23,49,31,57,20,22,33,56,2,30,78,84,99,22,93,78,64,2,39,92,32,12,57,36,37,71,88,36,37,72,40,4,69,85,38,54,68,19,29,12,54,83,32,100,87,14,71,51,38,27,8,49,22,38,81,86,49,20,73,4,34,47,41,17,5,6,13,26,46,95,26,80,59,26,83,57,12,42,92,1,31,47,27,33,24,90,17,56,9,61,77,90,22,68,26,18,86,81,72,51,15,93,13,41,35,2,73,15,50,79,50,7,39,26,95,94,48,46,88,82,75,7,98,68,52,85,88,94,70,60,0,90,84,57,42,37,56,91,5,0,45,86,11,57,19,21,48,45,76,48,46,47,33,69,63,61,41,71,62,81,63,66,61,97,29,20,64,5,67,52,15,20,37,33,3,31,26,39,83,68,11,54,13,86,61,94,4,67,19,4,2,64,59,35,50,18,97,64,93,69,53,75,74,37,38,93,85,43,14,14,93,68,35,63,55,80,62,74,39,19,19,65,55,18,1,78,10,13,74,78,40,97,36,46,53,98,59,64,28,30,34,66,58,93,51,64,65,77,46,13,12,79,20,14,76,22,38,98,96,64,19,59,97,86,50,11,84,4,70,62,81,48,42,57,3,3,77,96,28,15,64,56,49,83,82,25,13,57,85,69,62,51,89,23,91,90,92,89,97,23,70,83,76,2,62,13,76,46,9,75,87,40,100,37,46,82,32,20,19,100,31,87,87,10,32,24,26,51,89,50,60,67,12,98,9,25,12,20,92,7,15,65,43,1,14,90,92,64,22,68,31,68,82,40,36,61,84,39,93,34,69,73,52,84,46,53,89,10,31,5,6,66,60,65,75,68,64,27,37,39,75,65,88,68,98,9,56,54,53,65,46,63,5,57,15,48,4,39,4,61,60,72,23,58,65,14,75,92,14,86,64,27,91,66,31,66,54,24,4,34,47,89,65,93,97,3,0,50,3,83,78,81,93,37,15,72,92,68,66,20,11,66,19,78,93,28,52,4,87,72,36,52,25,76,98,94,68,51,37,82,95,62,82,69,93,67,39,88,35,22,28,51,80,99,12,33,68,42,37,11,85,23,37,54];

function setup()
{
   //find the first number 42
    var meaningOfLife = 0;
    for(var i = 0; i < numArray.length; i++)
    {
        if(numArray[i] == 42)//finds all the placements with the value 42
        {
            console.log("found the meaning at index " + i);//all the placements with the value 42
            meaningOfLife = i;
            break; //this stops the loop
        }
    }
    console.log("the meaning of life is at index " + meaningOfLife)
}

Find the highest / lowest value

var numArray = [];
function setup()
{
    for(var i = 0; i < 100; i++){
        numArray.push(round(random(0, 1000)));
    }
    
    //find the smallest value in the array
    //and its index
    var highestValue = 0;
    var highestIndex = 0;
    
    for(var i = 0; i < numArray.length; i ++)
    {
        if(numArray[i] > highestValue) //this goes on a loop as long as it's higher than the current value of the highestValue, this could be tested with break; code
        {
            highestValue = numArray[i];
            highestIndex = i;
            console.log(highestValue);
        }
    }
    console.log("the highest value in numArray is " + highestValue + " it's index " + highestIndex);
}

function draw()
{
    
}

In this example, the loop starts at 46, then 225, till 977 as the highest.

If I add the break; code, the loop only runs once, and takes the first highest number 544.

var numArray = [];
function setup()
{
    for(var i = 0; i < 100; i++){
        numArray.push(round(random(0, 1000)));
    }
    
    //find the smallest value in the array
    //and its index
    var highestValue = 0;
    var highestIndex = 0;
    
    for(var i = 0; i < numArray.length; i ++)
    {
        if(numArray[i] > highestValue) //this goes on a loop as long as it's higher than the current value of the highestValue, this could be tested with break; code
        {
            highestValue = numArray[i];
            highestIndex = i;
            console.log(highestValue);
            break;
        }
    }
    console.log("the highest value in numArray is " + highestValue + " it's index " + highestIndex);
}

function draw()
{
    
}

Smallest Value

var numArray = [];
function setup()
{
    for(var i = 0; i < 100; i++){
        numArray.push(round(random(0, 1000)));
    }
    
    //find the smallest value in the array
    //and its index
    var highestValue = 0;
    var highestIndex = 0;
    
    var smallestValue = null; //null means that there's nothing stores there, cannnot use 0 or negative values
    var smallestIndex = 0;
    
    for(var i = 0; i < numArray.length; i ++)
    {
        if(numArray[i] > highestValue) //this goes on a loop as long as it's higher than the current value of the highestValue, this could be tested with break; code
        {
            highestValue = numArray[i];
            highestIndex = i;
//            console.log(highestValue);
//            break;
        }
        
        if(smallestValue == null || numArray[i] < smallestValue)
        {
            smallestValue = numArray[i];
            smallestIndex = i;
            console.log(smallestValue);
        }
    }
    console.log("the highest value in numArray is " + highestValue + " it's index " + highestIndex);
    
    console.log("the smallest value in numArray is " + smallestValue + " it's index " + smallestIndex);
}

function draw()
{
    
}

Excluding a Set of Values

continue;

The continue keyword will say, okay, skip this iteration in the loop, go back to the start of the for loop and move on to the next value of i. So, we are going to do nothing else with this particular element, we’re just going to skip over the for loop. But unlike break, we’re going to go back to the top and we’re going to carry on running through the different elements.

var circles = []; 

function setup() 
{ 
    createCanvas(800, 600); 
    
    for (var i = 0; i < 4000; i++)
    { 
        circles[i] = floor(random(0, 100));//adds value to the size of the circles
    } 
} 

function draw()
{ 
    //draw the circles to the canvas at a random location use the circles array for sizes ignoring any circle under 10 pixels
    //draw circles in red where they are bigger than 50 and blue otherwise 
    
    for(var i = 0; i < circles.length; i ++)
    {
        if(circles[i] < 10)//ignoring any circle under 10 pixels
        {
            continue;
        }
        if(circles[i] > 50)//finds circles that are more than 50 pixels
        {
            fill(255, 0, 0, 100);//in red where they are bigger than 50
        }
        else
        {
            fill(0, 0, 200, 100);//blue otherwise
        }
        ellipse(random(0, width), random(0, height), circles[i]);//the last code determines the size of the ellipse
    }
}

noLoop();

This code stops the loop. 

var circles = []; 

function setup() 
{ 
    createCanvas(800, 600); 
    
    for (var i = 0; i < 4000; i++)
    { 
        circles[i] = floor(random(0, 100));//adds value to the size of the circles
    } 
} 

function draw()
{ 
    //draw the circles to the canvas at a random location use the circles array for sizes ignoring any circle under 10 pixels
    //draw circles in red where they are bigger than 50 and blue otherwise 
    
    for(var i = 0; i < circles.length; i ++)
    {
        if(circles[i] < 10)//ignoring any circle under 10 pixels
        {
            continue;
        }
        if(circles[i] > 50)//finds circles that are more than 50 pixels
        {
            fill(255, 0, 0, 100);//in red where they are bigger than 50
        }
        else
        {
            fill(0, 0, 200, 100);//blue otherwise
        }
        ellipse(random(0, width), random(0, height), circles[i]);//the last code determines the size of the ellipse
    }
    noLoop();//stops the loop
}

From Exercises

var numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
for (var i = numbers.length; i > 0; i --)
{
    if(numbers[i] == i)
    {
        console.log("match!");
    }
}
//creates matches
var a = [[1, 0, 0], [0, 1, 0], [0, 0, 1]];
var b = [1, 0, 0, 0, 1, 0, 0, 0, 1];

for(var i = 0; i < 3; i ++)
{
    for(var j = 0; j < 3; j ++)
    {
        if(a[i][j] == b[i][j])
        {
           console.log("YES");
        }
    }
}

Common Errors

undefined – variable is not yet defined

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