We Keep Coding

How can I use a variable in String.fromCharCode()?

I am trying to get the code below to convert the unicode into a string but have no luck, please help?
function rot13(str) {
var message = "";
for (var i = 0; i < str.length; i++) {
message += str.charCodeAt(i) + " ";
}
message = message.split(" ").filter(Boolean).join(",");
return String.fromCharCode(message);
}
console.log(rot13("Hello World"))

fromCharCode("1,1,1,1") is not the same thing as fromCharCode(1,1,1,1) you need to use apply with an array.
function rot13(str) {
var message = "";
for (var i = 0; i < str.length; i++) {
message += str.charCodeAt(i) + " ";
}
message = message.split(" ").filter(Boolean);
return String.fromCharCode.apply(String, message);
}
console.log(rot13("Hello World"))

You want something like this:
http://buildingonmud.blogspot.com/2009/06/convert-string-to-unicode-in-javascript.html
function toUnicode(theString) {
var unicodeString = '';
for (var i = 0; i < theString.length; i++) {
var theUnicode = theString.charCodeAt(i).toString(16).toUpperCase();
while (theUnicode.length < 4) {
theUnicode = '0' + theUnicode;
}
theUnicode = '\\u' + theUnicode;
unicodeString += theUnicode;
}
return unicodeString;
}
console.log(toUnicode("Hello World"));

JavaScript unexplained failure CRM 2013

I have the following applied as a library to a CRM 2013 form
function calcServicePriceTotal() {
alert("Start");//----------HERE
if (document.getElementById("Services")) {
alert("InsideIf"); //----------HERE
var grid = document.getElementById("Services").control;
alert("ThisFar?");//----------HERE
var ids = grid.Control.get_allRecordIds()
alert("ThisFar2?");//----------HERE
for (i = 0; i < ids.length; i++) {
alert("InsideFor");//----------HERE
var cellValue = grid.control.getCellValue('iss_salesprice', ids[i]);
var number = Number(cellValue.replace(/[^0-9\.]+/g, ""));
sum = sum + number;
}
Xrm.Page.data.entity.attributes.get("ava_tempgrossvalue").setValue(sum);
alert("Done");//----------HERE
}
else {
alert("Else");//----------HERE
setTimeout("calcServicePriceTotal();", 2500);
}
}
For some reason I get as far as the alert("ThisFar?") line but then nothing else happens.
Does that mean that there is a problem with var ids = grid.Control.get_allRecordIds()? I don't know why I'm not at least seeing "ThisFar2".
Can anyone see anything obvious?

function calcServicePriceTotal() {
if (document.getElementById("Services")) {
var grid = document.getElementById("Services").control;
var ids = grid.get_allRecordIds()
var sum = 0
for (i = 0; i < ids.length; i++) {
var cellValue = grid.getCellValue('iss_salesprice', ids[i]);
var number = Number(cellValue.replace(/\D/g, ''));
number = number/100;
sum = sum + number;
}
Xrm.Page.data.entity.attributes.get("iss_value").setValue(sum);
}
else {
setTimeout("calcServicePriceTotal();", 1500);
}
}
Final working solution

Simple Quiz Game JavaScript

I'm just learning now. Can you please help me, why am I not getting the correct output. This is my code:
//ask questions
var quiz = [
["When is Bulgaria established?", 681],
["What year was it before 16 years?", 2000],
["When does WWII ends?", 1945]
];
//variables
var answer = [];
var correct = [];
var wrong = [];
var correctAns = 0;
var wrongAns = 0;
var oList = "<ol>";
//function to print the result in ordered list
function printResult(result){
for(var j = 0; j < result.length; j++){
oList += "<li>" + result[i] + "</li>";
}
oList += "</ol>";
return oList;
}
function print(message) {
document.getElementById('output').innerHTML = message;
}
//looping, adding correct and wrong answeres
for(var i = 0; i < 3; i++) {
answer[i] = prompt(quiz[i][0]);
if(parseInt(answer[i]) == quiz[i][1]){
correct.push(quiz[i][0]);
correctAns++;
} else {
wrong.push(quiz[i][0]);
wrongAns++;
}
}
//print logic
if(correct.length < 1 || correct == undefined){
print("You did not guess any of the quiestions!");
} else if (correct.length >= 1){
print("You have guessed " + correctAns + " questions.");
print(printResult(correct));
print("You have " + wrongAns + " wrong answeres.");
if(wrongAns > 0){
print(printResult(wrong));
}
}
I have watched this code over and over again and I still can't understand why am I getting undefined as a result. In the debugger, after the loop I check my vars and everything seems ok.

In your printResult function you are using var i instead of j,
Also you better use innerHtml+=message;
//ask questions
var quiz = [
["When is Bulgaria established?", 681],
["What year was it before 16 years?", 2000],
["When does WWII ends?", 1945]
];
//variables
var answer = [];
var correct = [];
var wrong = [];
var correctAns = 0;
var wrongAns = 0;
//function to print the result in ordered list
function printResult(result){
//HERE:
var oList = "<ol>";
for(var j = 0; j < result.length; j++){
oList += "<li>" + result[j] + "</li>";
}
oList += "</ol>";
return oList;
}
function print(message) {
document.getElementById('output').innerHTML += message;
}
//looping, adding correct and wrong answeres
for(var i = 0; i < 3; i++) {
answer[i] = prompt(quiz[i][0]);
if(parseInt(answer[i]) == quiz[i][1]){
correct.push(quiz[i][0]);
correctAns++;
} else {
wrong.push(quiz[i][0]);
wrongAns++;
}
}
//print logic
if(correct.length < 1 || correct == undefined){
print("You did not guess any of the quiestions!");
} else if (correct.length >= 1){
print("You have guessed " + correctAns + " questions.");
print(printResult(correct));
print("You have " + wrongAns + " wrong answeres.");
if(wrongAns > 0){
print(printResult(wrong));
}
}
<div id="output">
</div>

Basically you have three problems.
reuse of oList, the variable should be inside declared and used only in printResult.
Inside of printResult, use of i where j have been used and
At print, you replace the actual content with new content.
Just a small hint with variable names for counting. It is good practise to start always with i instead of j and go on with the letters in the alphabet.
var quiz = [["When is Bulgaria established?", 681], ["What year was it before 16 years?", 2000], ["When does WWII ends?", 1945]],
answer = [],
correct = [],
wrong = [],
correctAns = 0,
wrongAns = 0;
//function to print the result in ordered list
function printResult(result) {
var oList = "<ol>"; // !!! move variable inside of the function
for (var j = 0; j < result.length; j++) {
oList += "<li>" + result[j] + "</li>"; // !!! use j indstead if i
}
oList += "</ol>";
return oList;
}
function print(message) {
document.getElementById('output').innerHTML += message; // !!! append message
}
//looping, adding correct and wrong answeres
for (var i = 0; i < 3; i++) {
answer[i] = prompt(quiz[i][0]);
if (parseInt(answer[i]) == quiz[i][1]) {
correct.push(quiz[i][0]);
correctAns++;
} else {
wrong.push(quiz[i][0]);
wrongAns++;
}
}
//print logic
if (correct.length < 1 || correct == undefined) {
print("You did not guess any of the quiestions!");
} else if (correct.length >= 1) {
print("You have guessed " + correctAns + " questions.");
print(printResult(correct));
print("You have " + wrongAns + " wrong answeres.");
if (wrongAns > 0) {
print(printResult(wrong));
}
}

Your main mistake is using i intead of j:
for(var j = 0; j < result.length; j++){
oList += "<li>" + result[j] + "</li>";// here was i before
}

Javascript Can't use array content as array index?

When I trird to run the js code, it always said "Uncaught TypeError: Cannot read property '_id' of undefined" for
deployedID.push(data[j]._id);
So after some thinking, I believe the problem lies in
var j = deploy[i];
Is there any way to solve it? Thanks in advance.
Below is the complete code:
var deploy = [];
var deployedID = [];
var deployedename = [];
var deployedoname = [];
var deployedrank = [];
function popularizeTable(){
$.get("/SSS/getlist", function(data){
deploy = randomunique(data.length ,100);
for (var i = 0; i < 100; i++){
var j = deploy[i];
deployedID.push(data[j]._id);
deployedename.push(data[j].ename);
deployedoname.push(data[j].oname);
deployedrank.push(data[j].rank);
}
var str = " ";
var k = 0;
for (var i = 0; i < 5; i++){
str += "<tr>";
for(var j = 0; j < 20; j++){
str += "<td><section id=\"" + deployedID[k] + "\" class=\"container\"><div class=\"card\">"
str += "<figure class=\"front\"><img src=\"images/back.jpg\"></figure>";
str += "<figure class=\"back\"><img src=\"images/Clear/" + deployedename[k] + "/001.jpg\"></figure></div></td></section>";
k++;
}
str += "</tr>";
}
$("#table").append(str);
});
}
$( document ).ready(function() {
popularizeTable();
$(document).on("mouseover", ".card", function(){
$(this).toggleClass("flipped")});
});
function randomunique(max, num){
var uniquelist = [];
for (var j = uniquelist.length; j < num; j++){
var i = parseInt(Math.random() * (max - 1) + 1);
if (uniquelist.indexOf(i) == -1){
uniquelist.push(i);
}
}
return uniquelist;
}

How do i display the longest array in JS?

I want to create a Javascript array of words, then use Javascript to find the longest word and print it to the screen. Here is my code:
var StrValues = []
StrValues[0] = ["cricket"]
StrValues[1] = ["basketball"]
StrValues[2] = ["hockey"]
StrValues[3] = ["swimming"]
StrValues[4] = ["soccer"]
StrValues[5] = ["tennis"]
document.writeln(StrValues);

You can use length to find the longest string in a array. Here is a fiddle http://jsfiddle.net/2sebnb33/1/
for(var i=0;i<StrValues .length;i++){
if(StrValues [i].length>len){
len=StrValues [i].length;index=i;}
}

var strValues = ["cricket", "basketball", "hockey"];
var max = '';
for(var i = 0; i< strValues.length; i++) {
max = strValues[i].length > max.length ? strValues[i] : max;
}
alert(max);

Firstly, you need to correct the way you are creating array.
For instance, it should be like this
var StrValues = [];
StrValues[0] = ["cricket"];
The logic
var longestWord = "";
for (var i = 0 ; i < StrValues.length; i++) {
if(StrValues[i].length > longestWord.length) {
longestWord = StrValues[i];
}
}

See the code below:
var array = [];
array.push("cat");
array.push("children");
array.push("house");
array.push("table");
array.push("amazing");
var maxSize = 0;
var maxSizeWord = "";
for(var i = 0; i < array.length; i++) {
if (maxSize < array[i].length) {
maxSize = array[i].length;
maxSizeWord = array[i];
}
}
alert("The biggest word is '" + maxSizeWord + "' with length '" + maxSize + "'!");