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JavaScript - Beginner Javascript Arrays/strings Help
Hello, I very new to this language and I still feel like I'm not grasping it... But, anyways, I'm doing a thing for school and I have to let the user input a string. I need to save the string and turn it into an array. For every word that is less than five letters I put "little" at the beginning of the word and for every word that is more than five letters I put "big" at the end of each word. Then I need to return the new string into output. I think I wrote the code really incorrectly, so any tips/advice would be much appreciated! Also, I don't understand adding user input into a code if that makes sense. The tutorials/lessons I've been looking at all say to put information into an array first and then mess with it. But, what if you don't have information in the array until the user puts it in? And once they enter it, then you mess with what they entered. I can't seem to get how to do that. Thank you for your time
Code: function texter(newText){
var oldHTML = document.getElementById('outputPrompt').innerHTML;
document.getElementById('outputPrompt').innerHTML = newText+"<br />"+oldHTML;
console.log(newText);
}
function menuTwo(){
var userInput = document.getElementById('input').value;
var correctedInputArray = userInput.toLowerCase().split(" ");
var mainTwo = new Array([""]);
for(var i=0; i<correctedInputArray.length; i++){
var thisWord = correctedInputArray[i];
var lessFive = 5;
var moreFive = 6;
var restOfWord;
if(lessFive<5){
mainTwo[i]=thisWord+"-little";
}else if(moreFive>6){
mainTwo[i]="big-"+thisWord;
}
else{
restOfWord = thisWord.substr(1, thisWord.length-1);
}
}
output = mainTwo.join(" ");
texter(output);
}
</script>
</head>
<body>
<h1>Document</h1>
<input type='text' id='input' />
<input type='button' onclick='menuTwo()' value='submit'/>
<p id='outputPrompt'>Please enter 1,2,3 or exit only</b> </p>
</body>
</html>
Similar TutorialsOkay so I have this code for HMTL5 Canvas, however this is a JavaScript directed question not a Canvas question. Code: <script type="text/javascript">
var c=document.getElementById("myCanvas");
var cxt=c.getContext("2d");
cxt.moveTo(0,400);
cxt.lineTo(50,a);
cxt.lineTo(100,b);
cxt.lineTo(150,390);
cxt.lineTo(200,300);
cxt.lineTo(250,285);
cxt.lineTo(300,299);
cxt.lineTo(350,250);
cxt.lineTo(400,325);
cxt.lineTo(450,275);
cxt.lineTo(500,300;);
cxt.stroke();
</script>
That will draw a line graph, however I want to get the coordinates from a variable in the URL. So it may be example.com/a=500&b=600 . How would I retrieve these two variables and then insert in to they're respective places? Any help greatly appreciated, please make it as simple as possible - I'm good with my PHP now but JavaScript is all new Hello, A quick summary to inform you on what I'm trying to accomplish and then the question. If you want to skip to the question first, I have it in red letters lower down. Just figured I'd answer the "why are you doing it this way" question first. I am writing a tool in JavaScript in which a user selects various options via checkboxes and then a pre-engineered scenario image for a product matching those selections is displayed. Here is the basic workflow of the code: 1. The code runs through the checkboxes and based on whether the boxes are checked or not, adds a value of "1" or "0" to a string. There are some dashes added into the string to visually divide some categories of options. Here is an example of the resulting string: 0-0011100-101100 2. A variable named scenarioID holds the value of the resulting string. A switch statement is run which assigns a name to the scenario based on the scenario ID. Here is an example: PHP Code: switch(scenarioID){ case "0-0011100-101100": var scenarioName="Scenario 1"; break; } 3. The scenarioName variable is then used to pull up an image with the corresponding name. For example, if the scenarioName variable has a value of "Scenario 1" then an image named "Scenario 1" is displayed. --------------------------------------------- So here is where I am running into an issue: I have some scenario names that multiple scenario ID's match because they apply whether a specific checkbox is selected or not. Currently, I am still able to apply the correct name to the scenario by simply having multiple switch statements apply to the same scenario name. For example: PHP Code: switch(scenarioID){ case "0-0011100-101100": var scenarioName="Scenario 1"; break; case "0-1110011-101101": case "1-1110011-101101": var scenarioName="Scenario 2"; break; } However, I have some scenarios in which up to 3 options may apply whether or not they are checked. This means that I have to have 8 different switch cases (scenario ID's) for a single scenario name. Is there a way for me to wildcard the switch cases so that I can specify which items don't matter for a scenario? Something like the following example? PHP Code: switch(scenarioID){ case "0-0011100-101100": var scenarioName="Scenario 1"; break; case "*-1110011-101101": var scenarioName="Scenario 2"; break; } Sorry for my beginner question but I am having some trouble getting this to work. I am trying to create a simple I=PRT calculator so it can calculate interest. But when you run it it adds the digits. Ex. 5+100=5100 instead of 105. Give it a try. My code is bellow.[CODE] // JavaScript Document alert("This is a simple calculator which will allow you to calculate the interest on a principle."); var principle = prompt("What is the amount you would like to calculate interest for?"); var rate = prompt("What is the interest rate. eg. For 3.9% write 3.9"); var term = prompt("How long in the period under calculation going to be? eg. For 1 year write 1"); var interest = principle*(rate/100)*term; var result = principle + interest; var a = "This means the interest is going to be $"; var b = " And the total to be paid is $"; var c = a + interest + b + result; alert(c); [CODE] Thanks in advance. Hi people I'm hoping someone can help me. I have NO knowledge of Javascript but I'm not afraid of code and happy to look at it and work out what is doing what. I need someone to provide me with a small sample of code to get me started on this task. I need a webpage with a number of drop down menus. Depending on what the user selects in these menus, depends on what sentence or paragraph is then displayed in a box. For example you might have a page dedicated to food. So the user would select egg in the first drop down and the box will change to display "you can't make much with that on it's own".# You'll then select flower in the second and it'll adjust to a paragraph maybe explaining where you could go next with that. In my page I need 6 drop down menus with about 8 choices in each menu (nothing related to food). Not sure if I would need to tie this in with a database or if I could just make do with the code on the page. As I said I'm hoping someone can just kick me off with something do I can get a rough idea of how I would go about coding it. Maybe an example contain 3 drop down menus with 2 choices on each and a few possible sentences or paragraphs that it could generate in a box. If not then any advice would be really appreciated as I said I'm a complete newbie and I've never even looked at Javascript code to my knowledge. Many thanks is this code right its supposed to be a code that prompts the user for a number less than 100 and outputs only odd numbers less than or equal to the number entered by the user.for example if a user eneters the number 10 you should display 1,3,5,7,9 to the browser window?...im not sure if i have done it right..i gave it a go though! var input = prompt("Enter a number less than 100:", "10"); if( input <= 100){ nbsp; for (var i = 1, i <= input, i++2){ nbsp; document.write(i", "); nbsp; } }else{ nbsp; alert(input + " is not less than 100!"); } Hi every one I'm a beginner to java so I have a home work assignment and I'm suppose to create a soda machine thing. What I'm trying to do is make the price of soda * quantity of soda which will equal to the price with tax but I cant figure it out @_@. I know what I'm doing wrong with the "Total" button and the "value" and "quantity" and I've been looking over the internet and playing with it like crazy. So if anyone can help me figure this out that would be great. The code and a pic is on the bottom i hope i gave you guys enough info. This is what im trying to do. I dont know the first thing about java script but I also didnt know the first thing about html and css but someone showed me a few basic things to gt started and Ive excelled in both using dreamweaver. I just needed the basics and then I was able to work through it. Just like that I need help starting out with Java Script. Basically, Ive made a website and now I am trying to put in a slider(it is a photo slider which has a box drop down on the right with a description when it changes photos.) I was told to make a slider.css file in the css folder and a slider.js file in the java script folder. I coded everything correctly in the source code page to get the slider up and running. But it wont work. Am I supposed to have a Java script program downloaded or something? Please help if you know what Im talking about Ive hit a road block and if you can walk me through this process I would really appreciate it and I can continue with my project. Thanks I have to design a javascript program to capture five different numbers (monetary values), and save it in memory. Then another one that converts that value to, let's say, Euros, and display interest and commisions (which are values I'll have to add later, but the actual coding for the calculation is what's confusing to me. Let's just say, take 10% out of the initial value for interest, and 15% for commission). I would appreciate any help
What I'm trying to test out and learn is the process of a form using the get methode to print out the entered number to another test.htm page 1st code is the form Code: <html> <head> <script type="text/javascript"> </script> </head> <body> <form action="test.htm" method="get"> <font size="1" face="tunga">Enter a number</font> <input type="text" name="number" size="2"> <input type="submit" value="Submit"> </form> </body> </html> the 2nd code is the test.htm page I was hoping the value of var = number would document.write to this page. I was hoping I could do this without using ASP of php. I can see in the URL after the second page loads that the var number dos = the numbered entered but I can not get it to display. Code: <html>
<head>
</head>
<body>
<script type="text/javascript">
document.write("The number you entered is " + number);
</script>
</body>
</html>
as you can see im a beginner and im trying to learn this. I hope its not a stupid question Thanks John Hi, I am fairly new at Javascript but have some ability - though I can't figure this one out. I need a JavaScipt "IF Statement" that validates that a Text Field is in the format of 2 Letters then 2 Numbers. The field also has to contain a total of 4 characters no matter what. For example, every entry for that Text Field has to be in the following format: AB34 I would sincerely appreciate anyones help! I want to learn javascript and I found codecademy.com which seems like a great way to learn the language. Before the first lesson it says Quote: You should be comfortable with loops, if statements, functions, and objects before attempting this course. Can someone explain what these are or point me in the direction where I can find the answers? I tried searching with google, but I havent found anything that clearly states what exactly the loop, object, etc. is. Help me anyone I am completely stuck. If you do this I shall build a shrine in your honour. In the following code the 'for' loop gets data from the relevant tags of an XML file, then puts them into the 'txt' variable. It then moves onto the next record in the XML file and does the same thing. However, I don't want the contents of txt to be overwritten each time the code loops through each record. Instead I want it to add to txt, then loop around and add the new contents of txt to the previous contents of txt. I tried txt = txt + artist + title + year; but this didn't work. Can anyone explain how to do this? Please note the contents of the variables are strings of text not numbers. Code:
x=xmlDoc.getElementsByTagName("CD");
i=0;
function displayCD()
{
for (var i=0;i<x.length;i++)
{
artist=(x[i].getElementsByTagName("ARTIST")[0].childNodes[0].nodeValue);
title=(x[i].getElementsByTagName("TITLE")[0].childNodes[0].nodeValue);
year=(x[i].getElementsByTagName("YEAR")[0].childNodes[0].nodeValue);
txt= "Artist: " + artist + "<br />Title: " + title + "<br />Year: "+ year;
}
document.getElementById("showCD").innerHTML=txt;
}
Hi, I am working on a simple javascript craps game program. I need some advice since it won't display who the winner is, keep tally of who wins/loses, and the number of total games played. After using the error console there's an error with document.forms[0].thrower.value not being defined. Can anyone help me with this? PHP Code: <html> <head> <title> JavaScript Craps Game</title> <script type="text/javascript"> <!-- var n,die_1,die_2,total,h_won,c_won, flag, point,winner; function get_num() { var max = 6; var number=Math.random()*max + 1; var result=Math.floor(number); return result; } function roll_dice() { die_1 = get_num(); die_2 = get_num(); total= die_1 + die_2; // Insert the results of the dice into the appropriate fields document.getElementById("die1").innerHTML= die_1; document.getElementById("die2").innerHTML= die_2; document.getElementById("total").innerHTML= total; //document.forms[0].die1.value = die_1; //document.forms[0].die2.value = die_2; //document.forms[0].tot.value = total; //Subtracting 0 from these values forces them to be typed as numbers if (flag){ //This means we rolled something other than 2,3,7,11, or 12 so we have a point var th = document.forms[0].thrower.value; if (total == point) { //X wins winner = "x"; calculate_winnings(th,winner); flag = 0; //document.forms[0].flag.value="0"; game_count(); } else if (total == 7){ //Y wins winner = "y"; calculate_winnings(th,winner); flag = 0; //document.forms[0].flag.value="0"; game_count(); } } else{ var thwr = document.forms[0].thrower.value; if (total == 7 || total == 11) { //X wins document.getElementById("winner").innerHTML= "X Wins!"; //document.forms[0].winner.value= "X Wins!"; winner = "x"; calculate_winnings(thwr,winner); game_count(); } else if (total == 2 || total == 3 || total == 12){ //document.forms[0].winner.value= "Y Wins!"; document.getElementById("winner").innerHTML= "Y Wins!"; winner = "y"; calculate_winnings(thwr,winner); game_count(); } else { point = total; document.getElementById("winner").innerHTML= "Waiting for a 7 or a " + point; // document.forms[0].winner.value="Waiting for a 7 or a " + point; flag = 1; //document.forms[0].flag.value="1"; } } } function game_count() { //for keeping track of games if (n){ n = n + 1; } else { n = 1; } document.forms[0].totalgames.value = n; //return n; } function calculate_winnings(thrower,winner) { var button = document.forms[0].thrower.checked; if (button) { if (winner == 'x') { //computer was thrower and X won //document.forms[0].winner.value="Computer Wins!"; document.getElementById("winner").innerHTML= "Computer Wins."; add_to_computer_win(); } else { //computer was thrower and Y won //document.forms[0].winner.value="You win!"; document.getElementById("winner").innerHTML= "You win!"; add_to_human_win(); } } else { if (winner == 'x') { //human was thrower and X won //document.forms[0].winner.value="You Win!"; document.getElementById("winner").innerHTML= "You Win!"; add_to_human_win(); } else { //human was thrower and Y won //document.forms[0].winner.value="Computer Wins!"; document.getElementById("winner").innerHTML= "Computer Wins."; add_to_computer_win(); } } thrower = 0; } function add_to_human_win(){ if (h_won){ h_won = h_won + 1; } else { h_won = 1; } document.forms[0].human_won.value=h_won; } function add_to_computer_win(){ if (c_won){ c_won = c_won + 1; } else { c_won = 1; } document.forms[0].computer_won.value=c_won; } --> </script> </head> <body> <h1> <center> Craps Game </center></h1> <hr> <form> <table border="1"> <tr> <td width="45%" align="center"> <center><b><font size="4">Play!</font></b></center> <p><input type="button" name="roll" value="Roll Dice!" onclick="roll_dice()"></p> <table border="1"> <tr> <td>Die #1</td><td>Die #2</td><td>Total</td> </tr> <tr> <td><div id="die1"></div></td> <td><div id="die2"></div></td> <td><div id="total"></div></td> </tr> </table> <p>Result of roll: <div id="winner"></div></p> <!--<input type="text" size="30" name="winner" value=""></p>--> <p> </p> </td> <td width="35%"> <table border="1" cellspacing="7"> <tr> <th colspan="2" ><font size="4">Statistics:</font><br> <input type="text" size="2" name="totalgames" value="0"> total games played</th> </tr> <tr> <td align="center">Your wins</td><td>Computer wins</td> </tr> <tr> <td align="center"><input type="text" size="2" name="human_won" value="0"></td> <td align="center"><input type="text" size="2" name="computer_won" value="0"></td> </tr> </table> </td><td width="20%" align="center"> This will clear your statistics and start a new game<br> <input type="submit" name="startover" value="New Game"> </td></tr></table> <hr> <h3><a name="Help">Help</a></h3> <pre> The game of craps is a dice game played by two players, You and The House. First you toss the pair of dice. If the sum of the dice is 7 or 11, you win the game. If the sum is 2, 3, or 12, the house wins. Otherwise, the sum is designated as the "point," to be matched by another toss. So if neither player has won on the first toss, then the dice are tossed repeatedly until either the point or a 7 comes up. If a 7 comes up first, the house wins. Otherwise, you win when the point comes up. </body> </html> This has been resolved. The moment i posted it i realised the mistake i was making . Learnig how to delete my post, until then thought i would sdimply delete the content.
Ok so this is probably a simple question but i have hit a wall he So I have 20 arrays with incremental names (course1, course2, course3 ...) What i want to make is a selection box with 20 options. for each option the value would be course1[0] and the text shown would be course1[1]. if i write this code: <code> for (var i=1; i<=20; i++){ var select = document.getElementById("selectiontest") select.options[select.options.length] = new Option (course1[1], course1[0]) } </code> The code works and the correct array values are put as the option text and value. I am having trouble getting the loop to move from course1 to course2, i used the loop counter in the array name like this: <code> for (var i=1; i<=20; i++){ var select = document.getElementById("selectiontest") select.options[select.options.length] = new Option (('course'+i)[1], ('course'+i)[0]) } </code> this is where it stops working. I get 20 values of o. which i assume is the second character of course. How do i tell javascript to incrementally change the array name during the loop? Hi i am confused in one topic and need help, I have a javascript array containing objects like; Object values are ordered as Type, Amount and count. Object 1 => ("A" , 100 ,10) Object 2 => ("C" , 50 ,10) Object 3 => ("A" , 100 ,20) Object 4 => ("B" , 200 ,10) Object 5 => ("A" , 10 ,10) Object 6 => ("B" , 100 ,10) Object 7 => ("C" , 100 ,5) Object 8 => ("C" , 50 ,5) In the end i want to group these objects like ; ("A" , 100,30) (Note : 30 = 20 +10) ("A" , 10,10) ("B" , 200,10) ("B" , 100,10) ("C" , 100,5) ("C" , 50,15) 15 = 10 + 5 How can i do this in javascript, note that the new types will be added to this array ? Hi, I'm kinda newbie in javascript and would really like some help if you wouldn't mind? I'm working with dreamweaver and VBScript and have drop down lists being populated by dynamic recordsets, the tables that are being used are text fields and everything is working fine other than one niggly thing I want to do and just don't seem to be able to get the javascript code right The data I have has two columns; area and technical issue. As the area contains duplicates I have this as a separate drop down list with a distinct in the sql command and from an onclick event from the 'area' drop down list, I get the value of the selected item [var x = document.NewFacilityAdminDetailsTest.ara_component.selectedIndex; var ara_component = document.NewFacilityAdminDetailsTest.ara_component.options[x].value;] all's well so far.... The second drop down list contains all the 'technical issues' which is great, BUT because its a dynamic recordset its for ALL of the areas and I want to be able to take away the technical issue values in the technical issues drop down list that don't belong to the area that's been picked and I also dont' want the user selecting a technical issue that isn't linked of the area. I've tried some of the samples I've found by googling and even the adobe example but they all seem long winded and I never quite get the code right and the second drop down list just keep showing ALL 'technical issues show' for ALL of the 'areas'. Surely there's a bit of javascript to turn the second drop down list recordset into an array, loop through the array and remove the technical issues that don't match the selected value from the 'area' drop down list and put the array into the second drop down list instead of using the recordset? Any help would be soooooo useful. Best Regards Joan, Cheshire Any suggestions on how the javascript below should be changed so it will work with checkboxes that have brackets in the name? (I'm using foreach in php, and can't seem to get the php to work/work correctly without using them.) Thanks! Code: function chktotal(j) {
var total=0;
for (var i=0; i < document.form1.ckbx.length; i++){
if(document.form1.ckbx[i].checked){
total=total+1;
}
if(total>8){
alert("Please only select 8");
document.form1.ckbx[i].checked = false;
total = total -1;
return false;
}
}
document.form1.totalval.value = total;
}
<input onclick="chktotal(2)" value ="Sample Item 1" type="checkbox" name="ckbx[]">
hey guys i have the following code that extracts the information from the questiondiv then i have a for loop to search the array but it keeps returning it has no answer can someone help me please and i know im most probly doing somthing realy silly wrong. P.S some reason the codes indenting got messed up when i pasted it here Code: <html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
function code()
{
function getNodes(prop, val, meth, nd, useSelf )
{
var r=[], any= getNodes[val]===true;
nd=nd||document.documentElement;
if(nd.constructor===Array){nd={childNodes:nd};}
for(var cn=nd.childNodes, i=0, mx=cn.length;i<mx;i++)
{
var it=cn[i];
if( it.childNodes.length && !useSelf ){r=r.concat(getNodes(prop, val, meth, it,useSelf ));}
if( any ? it[prop] : (it[prop]!==undefined && (meth ? ""[meth] &&
String(it[prop])[meth](val) : it[prop]==val))){
r[r.length]=it;
}
}//nxt
return r;
};getNodes[null]=true;getNodes[undefined]=true;
//end getNodes()
var answer;
trivia = new Array('test?','test1');
var triviaGet = getNodes(
"data", //examine each node's .data property (only hits text nodes)
/\?/, //looking for text with a "?"
"match", //using String().match method to accept arguments[1]
document.getElementById("questiondiv") // looking in the question div
)[0].textContent.split("?")[0]+"?" //show text of first match
alert(triviaGet);
var i=0;
var answer1;
var answer2;
for(i=0; i < 8400; i++)
{
if(trivia[i] == triviaGet)
{
answer = trivia[i]+1;
document.getElementById("test").innerHTML=(answer)
break;
}
else
{
document.getElementById("test").innerHTML=("Answer not found!");
}
}
//search trivia array for match to question
//when found the answer is the next one in the array so if it finds the question at index 7261 then the answer is in index 7262
// TODO: insert answer into text box...
}
</script>
</head>
<body>
<div style="display: none;" id="questiondiv">
You challenge The Wiseman to a game of trivia, he asks you this question:<br/> <br/>
test?<br/> <br/>
<input class="dungeoninput" type="text" size="16" id="answer" value="" maxlength="32"></input><br/>
<div class="btn100" style="margin-top: 6px;"
onclick="loadDiv2('/dream/explore?action=acceptTrivia&qid=727'); return false;">Answer</div>
</div>
<div id="test"> test </div><br />
<button value="code()" onclick="code()">click me</button>
</body></html>
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