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JavaScript - Assign Array To Variable
If I assign an array to another variable, any changes to the array change both variables. Is it a pointer instead of a copy? Try this:
Code: <script type="text/javascript">
Arr=['a','b','c'];
Arr2=Arr;
Arr[1]='_';
alert('Array 1: '+Arr);
alert('Array 2: '+Arr2);
// Both arrays become 'a','_','c'
</script>
Why's this happen? Is it to be expected? Variables don't do this but it's happening for arrays in IE and FireFox, maybe all others. Similar TutorialsEDIT: goto post #7 here goes JS code: (keep an eye on codes of type: document.getElementById('footerX').innerHTML=X Code: function details()
{
var choo = document.getElementById("choo");
aa = choo.chooserver.value;
bb = choo.chooversion.value;
if(aa==1) {k=0}
else if(aa==2) {k=1}
else {k=false}
pa= domain[k].getElementsByTagName("server") ;
pb="";
pc = domain[k].getElementsByTagName("version");
pd= domain[k].getElementsByTagName("date");
pe= domain[k].getElementsByTagName("month");
pf= domain[k].getElementsByTagName("year");
ta = (bb==1)? " T4 ":(bb==2)? " T3.6 " :(bb==3)? " T2.5 " : 100 ;
versions(ta);
document.getElementById('footer1').innerHTML='one';
}
function versions()
{
for (i=0;i<=pc.length;i++)
{
a = pc[i].childNodes[0].nodeValue;
b = pa[i].childNodes[0].nodeValue;
comparedate(d,g,f);
dates(i, a);
document.getElementById('footer2').innerHTML='two';
if (a==ta)
{
addto()
document.getElementById("mc"+i).innerHTML= txt ;
document.getElementById("md"+i).innerHTML= txt2 ;
}
document.getElementById('footer3').innerHTML='tee';
}
document.getElementById('footer4').innerHTML='fou';
}
HTML: Code: <div id = "conten2"> <table id="tb1" border="1px"> </table> </div> <div id = "footer"> feet </div> <div id = "footer1"> feet1 </div> <div id = "footer2"> feet2 </div> <div id = "footer3"> feet3 </div> <div id = "footer4"> feet4 </div> <div id = "footer5"> feet5 </div> Desired Output: feet one two tee fou feet5 Output: feet feet1 two tee feet4 feet5 Area of error predicted: inside the for loop, the statement immediately after loop is not executed once loop ends, nor does it return to original function for execution of other statements which were written after the function containing the loop was called.... Hi! I am quite new to the world of JavaScript as I have done basic corse for it... and I have learnt that best way to understand it is to play around with it... but now I am stuck with on of the problem!! Problem: How can we assign text box input values by user to a variable and display that variable back on another element of the same HTML document(dynamically)... Conditions: The value has to be stored as a JavaScript variable only. No server-side script is to be used and has to be done locally. Please help! I'm having problems with selecting values from array. I have a dropdown box where you choose what fruit you want to buy. When selected the array should assign 2 values to that fruit. I don't know how to do that. Here's what I have.. I added comments. Javascript part: Code: <script type="text/javascript">
function Fruits() {
var selectfruit = newArray( //assigning values to fruit selected from dropdown box
newArray("Banana", 1, 1),
newArray("Apple", 1.2, 0.5),
newArray("Mango", 1.1, 0.9),
newArray("Orange", 0.1, 9.99));
var howmanyfruits = Number(document.getElementById("howmanyfruits").value); // how many fruits are you buying
var totalfruitsowned = Number(document.getElementById("totalfruitowned").value); // How many fruits do you already have
/* cash and coupons needed to buy fruits.
cash is cpst for 1 fruit.
coupons is cost for 1 fruit
cash_all is cost for all fruits you're buying
coupons_all is cost for all fruits you're buying
each fruits requires cash AND coupons to be bought. Cash and coupons are tied to the first values in Array.
Eg. If you choose Apple that value would be 1.2
The 'fruitsmaxtobuy' variable is not tied to the first value, but the second one in array.
If you choose Apple that value would be 0.5.
*/
var cash = Math.round(((totalfruitsowned * 0.51 * selectfruit) + 700)*10)/10;
var coupons = Math.round(((totalfruitsowned * 0.51 * selectfruit) + 850)*10)/10;
var cash_all = Math.round((howmanyfruits * cash)*10)/10;
var coupons_all = Math.round((howmanyfruits * coupons)*10)/10;
var fruitsmaxtobuy = Math.round((totalfruitsowned * 0.12 * selectfruit)*10)/10;
/*
Display Error if nothing is entered or if you forget to enter total fruits
*/
if (((howmanyfruits=="" || howmanyfruits==null) && (totalfruitsowned=="" || totalfruitsowned==null)) || ((howmanyfruits==Number(document.getElementById("howmanyfruits").value)) && (totalfruitsowned=="" || totalfruitsowned==null)))
{document.getElementById("cash").innerHTML = "Error";
document.getElementById("coupons").innerHTML = "Error";
document.getElementById("cash_all").innerHTML = "Error";
document.getElementById("coupons_all").innerHTML = "Error";
document.getElementById("fruitsmaxtobuy").innerHTML ="Error"}
else {
document.getElementById("cash").innerHTML = cash;
document.getElementById("coupons").innerHTML = coupons;
document.getElementById("cash_all").innerHTML = cash_all;
document.getElementById("coupons_all").innerHTML = coupons_all;
document.getElementById("fruitsmaxtobuy").innerHTML =fruitsmaxtobuy}
}
</script>
HTML part: Code: <form action="" id="fruitcost">
<table align="center" width="37.5%" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<th colspan="2" align="center">Fruit cost calcultor</th>
</tr>
<tr>
<td>Select Fruit:</td>
<td align="center"><select id="selectfruit">
<option>Banana</option>
<option selected>Apple</option>
<option>Mango</option>
<option>Orange</option>
</select>
</td>
</tr>
<tr>
<td>Total Fruits Owned:</td>
<td align="center"><input id="totalfruitsowned" type="text" /></td>
</tr>
<tr>
<td>How many fruits are you buying:</td>
<td align="center"><input id="howmanyfruits" type="text" /></td>
</tr>
<tr>
<td>Money Needed to buy 1 fruit:</td><td><font id="cash"></font></td>
</tr>
<tr>
<td>Coupons Needed to buy 1 fruit:</td><td><font id="coupons"></font></td>
</tr>
<tr>
<td>Money Needed:</td><td><font id="cash_all"></font></td>
</tr>
<tr>
<td>Coupons Needed:</td><td><font id="coupons_all"></font></td>
</tr>
<tr>
<td>Nr. of fruits you can buy:</td><td><font id="fruitsmaxtobuy"></font></td>
</tr>
<tr>
<td align="center" colspan="2"><input type="button" value="Submit" onclick="Fruits()" /></td>
</tr>
</tbody>
</table>
</form>
Hey. I have a string and I can return say, the fourth letter with output[3], but i can't assign a value to it for some reason: I am trying to make hang man Code: <!DOCTYPE html>
<html>
<head>
<script src="jquery.min.js"></script>
<script>
$(document).ready(function(){
var word, output, wordLength, stringLength, newLetter, letters;
var i, n, k, health, wcheck;
word = "word";
output = "";
letters = "";
wordLength = word.length;
for(i = 0; i < wordLength; i++){
output += "_";
}
$("#inputLetters").keyup(function(){
newLetter = $("#inputLetters").val();
$("#inputLetters").val("");
letters += newLetter;
wcheck = false;
for(i = 0; i < wordLength; i++){
if(word[i] == newLetter){
wcheck = true;
output[i] = newLetter;
}
}
if(wcheck = false){
health++;
}
$("#letters").html(output + "<br />" + letters);
});
});
</script>
</head>
<body>
<span id="letters">
</span>
<br />
<br />
<input id="inputLetters" type="text" />
</body>
</html>
hi guys i hava gridview gvcustomers with following fields latitude,longitude,customer and i have a javascript function in my aspx page fucntion Customer() { AddCustomer(lat1,long1)--- row1 of gridview lat long AddCustomer(lat2,long2)--row2 of gridview lat long } in the above function i would like to loop through the gridview and get the latitude and longitude colmns in the function instead of hardcoding as i have been doing now...thank you i advance Hi, I was working on this problem that asks me to return an array of scores for each string (only for its content part, not URL) in the global variable, which is an array. For example, alert a score of 0 if the string z is not found, 1 if found once, and 2 for twice. My problem is that I can get the code to alert if it has found the word (ex. "the"), but I cannot manage to : a) Assign separate scores for each string. b) Make the search case insensitive i.e. "the" will appear in 0,1, but not in 2, where it is capitalized I would appreciate any help! [CODE] var c = ["[www.facebook.com] Facebook is the best social networking site to coccent with your friends. ", "[www.google.co.uk] Google is the worldwide search engine. ", "[www.bbc.co.uk] The best news source for starting your day. "]; function findScore(z) { for (var i=0; i<c.length; i++) { var a = c[i].toString(); var b = a.search(z); if(b>-1) { alert (z + " found in array " + i); } } } findScore("the"); [CODE] Sorry for not being able to wrap the code! var s="attr" var i=$(s) // jQuery(elem).attr(attr,eval("elm"+attr)); jQuery(elem).$(s)(attr,eval("elm"+attr));//i tried this. how to assign a variable name in the above code(in place of s) so that i need to add an attribute to the element "elem". I am currently trying to check using javascript whether a php array contains a variable, and if it does then display a message. Any help would be much appreciated. I have written the following code... Code: <?php
//php which sets users array to the results of the sql
$selectquery = "SELECT Username FROM User";
$selectresult = mysql_query($selectquery);
while ($row = mysql_fetch_array($selectresult)){
$users[] = $row['Username'];
}
?>
<script language="javascript" type="text/javascript">
function verifyUsername(array_var){
var user = document.getElementById("username").value;
for(var i=0; i<array_var.length; i++){
if(array_var[i] == user){
document.getElementById("usernameerror").textContent = "already in array";
}
}
}
</script>
//html code for the form
Username: <input type="text" name="username" id="username" onblur="return verifyUsername(<?php $users?>)"/>
<span id="usernameerror" class="red"></span>
I need to get this script to work, I only included what im having the problem with. I am Using jQuery Library. Here is how this should work: .btnRoof div is clicked the parent id is retrieved as var pid a function called roof is called which simply changes a css background to "color" the function perform is called to get the "color1[0]" from the array. My Problem: perform() returns the word color1, color10, color1[0], or c. instead of images/cp-roof-blue.png as listed in the array. Code: $(document).ready(function() {
var color1=new Array();
color1[0]="images/cp-roof-blue.png";
color1[1]="images/cp-panel-blue.png";
color1[2]="images/cp-trim-blue.png";
function perform(name, x) {
alert(name[x]);
//alert([name][x]);
//alert(name+'['+x+']');
//alert(color1[0]); // correct
return name[x];
}
function Roof(color) {
$("#colorPicker .roof").css("background", "url("+color+")");
}
$('.btnRoof').click(function() {
var pid = $(this).parent().parent().attr("id");
Roof(perform(pid, 0));
});
});
I tried to clarify as much as possible, please let me know if I need explain further. Thanks. Hello everyone, I couldn't find anything informative on this subject online. could someone point me to the right direction on how to convert php variable so it could be used in a javascript section. for example I have a php array named $places, it's a nested array and I'd like to traverse through all the elements of this array much like it's done in php =>foreach($places as $place) but this done in JS. in a nutshell how do i convert this variable into a JS appropriate variable. -Thank you I was wondering if it is possible to put all the non null variables of an array into a string variable with spaces between each array value? For example, if array() is a text array and has 10 values, array(0) through array(9), with three of those values null, let's say array(3), array(5), and array(7) are null, is there a way to put the remaining seven values into a string variable with spaces between each array value?
the title kind of sums it up... if I have an array of equations (I'm guessing they should be strings but they don't have to be) and a user-defined variable can that variable be used for the "x" in the equations? I already did the easy part ... Code: <!DOCTYPE html>
<html>
<head>
</head>
<body>
<input onkeyup="solve(this.value)" /><br>
<input id="box0" /><br>
<input id="box1" /><br>
<input id="box2" /><br>
<script type="text/javascript">
var equations=["(x*9/5)+32","x+273.15","x-50*(8/13)"]
function solve(val){
for (var i = 0; i < equations.length; i++) {
document.getElementById("box"+i).value= //ummm...
}
}
</script>
</body>
</html>
I have inherited some code, and cannot get it to work. Note the bold section in the OBJECT tag below. I believe this is where the issue is. Code: <script language="JavaScript">
var camArray = new Array();
camArray['Dolliver'] = "http://video.dot.ca.gov/asx/D5-Bello-at-101.asx";
camArray['Mattie'] = "http://video.dot.ca.gov/asx/D5-Mattie-Rd-at-101.asx";
camera="Dolliver";
var camHTMLd = "<object id='MediaPlayer' width=320 height=240 classid='CLSID:22D6f312-B0F6-11D0-94AB-0080C74C7E95' standby='Loading Windows Media Player components...' type='application/x-oleobject' codebase='http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=6,4,7,1112'><param name='filename' value='"+camArray[camera]+"'><param name='Showcontrols' value='False'><param name='autoStart' value='True'><embed type='application/x-mplayer2' src='"+camArray[camera]+"' width=320 height=240></embed></object>"
function changeCam(camera){
document.getElementById("caltransCamera").innerHTML = camHTMLd;
//alert(camHTMLd+camArray[camera]);
}
</script>
Then in the page, I have the following code: <a href="javascript:changeCam('Mattie');">101 at Mattie Road</a> It SHOULD open and start displaying the MATTIE cam, but it reloads the default Dolliver. What am I missing? Thank you in advance. Hello again eveyone it is the new guy with yet again asilly question. OK here goes.... ..... is it posable to have JS assign a sequental value as the ID for rows in a table. As some of you might know I have an MS Excel spread sheet with data in it that I am wanting to load into a web page. I have worked out how to get the data from Excel but I want to create a JS Function that will read the file then create a table using a template like Clone table but I will need each row entered from the Excel file to have a different ID from the prev entry and different than the next entry. Here is an example of what I'm talking about so that I am as clear as I can be. Quote: Function read () { Reads row 1 from Excel file} Function filltemplatetable (){ Take the data from Function read and placed it in a template table that I have created} Function fillmaintable() {Takes the newly created table object and inplant it in the maintable as a row} Function assignrowid () {assign the newly added row to the maintable as ID 1} Loop back to Function read () untill the last row in the Excel file is copied over to the web page. I was hopeing that the loop could creat a sequenchal numbering system that I could use later on for collaps/expand not to mention filtering but I need to make this an onload so that when I update teh Excel spreadsheet this web page will update the changes. I KNOW I KNOW I just droped a chunk on ya'll and I'm not asking for you guys to do the work for me but I am begging for some direction. I wish I had some CODE to show you guys but I don't have any that pertains to this stage in my work because i'm not even sure it is posable if it isn't then I will need to rethink my creation steps. THANKS AGIN in advance hey man,i write this code , Code: <html>
<head>
<script type="text/javascript">
function Do()
{
winow.location.assign("http://www.google.com");
}
</script>
<script type="text/javascript">
function replaceDoc()
{
window.location.replace("http://www.w3schools.com")
}
</script>
</head>
<body>
<input type="button" value="Google" onclick="Do()" />
<input type="button" value="Replace document" onclick="replaceDoc()" />
</body>
</html>
i want to see if i click Google button I have a randomly generated Language file that corresponds to keys, the reason Ii say randomly generated is that the letter to key values used are not standard assignments. It seems the language coding is DEC in sets of 3 values by 5 .i.e. "248 036 034 036 248" = A "036 084 084 084 120" = a (See attached : ENGLISH-1.txt) How would I assign these values to a sentence lets say: All great : 248 036 034 036 248 ll gre 036 084 084 084 120 t but convert all characters to their correspondnig sets of 5 ? This then needs to get sent to a database where it is interpreted into sets of Binary to turn on and off LEDs' ... I have never worked with Javascript or LED's before, so any help is so appreciated. Hi all, I have a table with two columns, first is a text field (quantity) and second is product description. Then I have a JavaScript code in the header section that calculates total based on quantity X price. Right now, user has to input quantity in the text field in first column. I would like to change the first column to checkboxes, which I know how to do...problem is I don't know how to adjust the JavaScript so that it knows a checked box is equivalent to a value of 1. Here is a sample of the table code which gives me 2 cells (a blank text field, and a description cell of "A"), and the totals field at the bottom of the table: Code: <TR> <TD ALIGN="CENTER"><INPUT TYPE=TEXT NAME="PROD_A_4.99" SIZE=3 MAXLENGTH=3 onChange="CalculateTotal(this.form)"></TD><TD>A</TD> </TR> <TR><TD>TOTAL</TD><TD ALIGN="RIGHT"><INPUT TYPE=TEXT NAME=TOTAL SIZE=10 onFocus="this.form.elements[0].focus()"></TD> And here is the bit of JavaScript that calculates the table: Code: <script language="JavaScript" type="text/javascript">
<!--
function CalculateTotal(frm) {
var order_total = 0
// Run through all the form fields
for (var i=0; i < frm.elements.length; ++i) {
// Get the current field
form_field = frm.elements[i]
// Get the field's name
form_name = form_field.name
// Is it a "product" field?
if (form_name.substring(0,4) == "PROD") {
// If so, extract the price from the name
item_price = parseFloat(form_name.substring(form_name.lastIndexOf("_") + 1))
// Get the quantity
item_quantity = parseInt(form_field.value)
// Update the order total
if (item_quantity >= 0) {
order_total += item_quantity * item_price
Any ideas on how to change the item_quantity to always=1 so that I can change the input type from 'text' to 'checkbox'? Then, with this example, if the user were to check the box for "A" the "total" field would say 4.99 Thanks in advance! I am trying to pass data from one form to another form using the url i can get it to come up on the next pages url but how do i get it to go to a text box on the new form. is there a way of assigning text boxes. being trying it in javascript and asp even php would like to keep it to javascript but am open minded to just get it to work i want to assign content of textarea to a div .. like in twitter when you type something and press "Tweet" a div is created and has the content of textarea.. how can i implement it , i know something about getElementById() but not sure how it can help me here Hi everyone I have some problems with assigning a class to my included navagation menu. I would like to give the last clicked menu item a active class so I can style it but i have no clue how that works with javascript. as you can see i have three files two pages which included the same menu. Now I would like to set the first page to active because it would be the page the would start. but then when someone clicks the second page it should become inactive and set the active class to the secone link. if that makes sens. Is this possible with javascript? my pages: Page 1 PHP Code: <HTML> <BODY> <?php include "menu.php" ?> PAGE </BODY> </HTML> Page 2 PHP Code: <HTML> <BODY> <?php include "menu.php" ?> PAGE 2 </BODY> </HTML> menu.php PHP Code: <a href="page.php" class="active">page1</a> <a href="page2.php" class="noactive">Page2</a> |
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