Assignment-Programmes.txt

Question.
Python, Ruby or JavaScript Write a function that takes an array of integers and returns that array rotated by N positions using JavaScript.
For example, if N=2, given the input array [1, 2, 3, 4, 5, 6]
the function should return [5, 6, 1, 2, 3, 4]

Answer:-
var array = [1, 2, 3, 4, 5, 6];
var N = 2;
function rotateArray(array, N) {
  newArray =  array.slice(array.length - N).concat(array.slice(0, array.length - N));
  return newArray;
}
rotateArray(array, N);

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Question.
In JavaScript , answer if the following expressions result in true or false (and explain your
answer)
a. "0" == 0 // true or false?
b. "" == 0 // true or false?
c. "" == "0" // true or false?

Answer:-
console.log("0" == 0);
//In this case, leftval/leftoprnd is String and rightval/rightoprnd is Number Jvascript check Equality(operand string convert into Number type) ToNumber(0) == 0
console.log("" == 0);
//In this case, leftval/leftoprnd is String and rightval/rightoprnd is Number Jvascript check Equality(operand "" convert into Number type) ToNumber(0) == 0
console.log("" == "0");
//In this case, both operands are String type and both are not same valued so will return as false;

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Question.
Most languages have a built in sort method that will sort an array of strings alphabetically. Demonstrate how to sort an array of strings by the length of each string, shortest strings first.
Hint: clean, small code wins.

Answer:-
arr = []
arr[0] = "a";
arr[1] = "abcdef";
arr[2] = "abc";
arr[3] = "ab";
arr[4] = "abcde";
arr[5] = "abcd";
arr.sort(function(array1, array2){
  return array1.length - array2.length;
});

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Question.
function weird(x) {
var tmp = 3;
return function(y) {
return x + y + ++tmp;
}
}
var funny = weird(2);
var final_answer = funny(10);
What is the value of final_answer at the end of this snippet? Please explain your answer

Answer:-
function weird(x) { //x parameter is 2
	var tmp = 3;
	return function(y) { 
	return x + y + ++tmp; //returns 2 + 10 + 4(incremented value 3+1) = 16 
	}
}
var funny = weird(2);
var final_answer = funny(10);

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Question.
Consider the following pattern:
A → D M → P X → A
a → d m → p x → a
Now, write a program to solve the following message using Python, JavaScript or Ruby.
Vrphwklqj phdqlqjixo
Hint: The answer is something meaningful.

Answer:-
function convertString(string) {
    for (var i = 0; i < string.length; i++) {
        var asc_code = string.charCodeAt(i);
        var conv_code;
        if ((asc_code >= 65 && asc_code <= 67) || (asc_code >= 97 && asc_code <= 99)) {
            conv_code = asc_code + 23;
        } else if ((asc_code >= 68 && asc_code <= 90) || (asc_code >= 100 && asc_code <= 122)) {
            conv_code = asc_code - 3;
        } else if (asc_code == 32 ) {
	    conv_code = asc_code;
	}
	else
	    conv_code = asc_code;

        document.write(String.fromCharCode(conv_code));
    }
}

convertString("Vrphwklqj phdqlqjixo");


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Question.
Use the following paragraphs (in italics below) as input to the program you wrote for Question 5.
It should output a meaningful question. Write a program to solve that question.
Zulwh d surjudp (lq Sbwkrq, MdydVfulsw ru Uxeb) wr srsxodwh dqg wkhq vruw d
udqgrpob glvwulexwhg olvw ri 1 ploolrq lqwhjhuv, hdfk lqwhjhu kdylqj d ydoxh >= 1 dqg <=
100 zlwkrxw xvlqj dqb exlowlq/hawhuqdo oleudub/ixqfwlrq iru vruwlqj.
Brxu surjudp vkrxog fduhixoob frqvlghu wkh lqsxw dqg frph xs zlwk wkh prvw hiilflhqw
vruwlqj vroxwlrq brx fdq wklqn ri. Surylgh wkh vsdfh dqg wlph frpsohalwb ri brxu dojrulwkp


convertString(`Zulwh ​d ​surjudp ​(lq ​Sbwkrq, ​MdydVfulsw ​ru ​Uxeb) ​wr ​srsxodwh ​dqg ​wkhq ​vruw ​d
udqgrpob ​glvwulexwhg ​olvw ​ri ​1 ​ploolrq ​lqwhjhuv, ​hdfk ​lqwhjhu ​kdylqj ​d ​ydoxh ​>= ​1 ​dqg ​<=
100 ​zlwkrxw ​xvlqj ​dqb ​exlowlq/hawhuqdo ​oleudub/ixqfwlrq ​iru ​vruwlqj.
Brxu ​surjudp ​vkrxog ​fduhixoob ​frqvlghu ​wkh ​lqsxw ​dqg ​frph ​xs ​zlwk ​wkh ​prvw ​hiilflhqw
vruwlqj ​vroxwlrq ​brx ​fdq ​wklqn ​ri. ​Surylgh ​wkh ​vsdfh ​dqg ​wlph ​frpsohalwb ​ri ​brxu ​dojrulwkp`);


Answer:
var randomList = [];
for (var i = 0; i < 100; i++) {
    randomList.push(Math.round(Math.random() * 999999))
}

function bubbleSort(randomListArray) {
    var nextLast = randomListArray.length - 1, holder, swappingOccured, index, nextIndex;
    randomListArray.some(function() {
        swappingOccured = false;
        for (index = 0; index < nextLast; index += 1) {
            nextIndex = index + 1;
            if (randomListArray[index] > randomListArray[nextIndex]) {
                holder = randomListArray[nextIndex];
                randomListArray[nextIndex] = randomListArray[index];
                randomListArray[index] = holder;
                swappingOccured = true;
            }
        }
        if (!swappingOccured) {
            return true;
        }
        return false;
    });
}

bubbleSort(randomList);

console.log(randomList);


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Question.
Write a simple program that reads a line from the keyboard and outputs the same line where
every word is reversed. A word is defined as a continuous sequence of alphanumeric characters
or hyphen (‘-’). For instance, if the input is
"We are at Google Solutions! Their email-id is careers@google.com"
the output should be
"eW era ta elgooG snoituloS! riehT di-liame si sreerac@elgoog.moc"
HINT: Read the problem and the example carefully before starting

Answer:-

var _string = "We are at Google Solutions! Their email-id is careers@google.com";
var fnReverseString = function(_string){
  return _string.replace(/[a-zA-Z0-9-_]+/gm, function(_response) {    
        return _response.split("").reverse().join("");
    });
};
console.log(fnReverseString(_string));