Creating A M*n Table Using Functions And For Loops?
Oct 16, 2011
Write a script to generate two random numbers for variable m and n, the values generated for the variables should range from 1 to 10. We want to make an m * n table (m rows and n columns) with the word Hello in each of its cells. Now define a function f with one parameter n that displays n columns of one row of the table (You need a for-loop). Call this function m times to display m rows of the table. For example if m = 6 and n = 4 we should get the following:
HelloHelloHelloHello
HelloHelloHelloHello
HelloHelloHelloHello
[code]....
(The above is supposed to be a table but did not copy fully)This was my attempt, although i really did not know how to attack this.
<script type="text/javascript">
function f(n)
{
[code]...
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Oct 26, 2011
I've now got to form an average of snowfall inputs, taken from looped prompts, however I'm not allowed to use arrays or functions...Almost every example I see uses arrays, such as this one here:http://www.codingforums.com/showthread.php?t=4313Is it possible to not use arrays to form the average? Please describe how to do this in general terms, as was highlighted in that link ^^^ I want to learn, not copy, although one can be derived from the other...What I haveso far, assume all vars have been announced.
for (var d=1; d<=numofinputs; d=d+1)
{
input = prompt("Enter a data input" + d)
}
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Oct 16, 2010
I am confused about the true difference between the two below examples.
first example:
// Demonstrating a problem with closures and loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();
[code]....
Here we iterate through the length of myArray, assigning the current index of myArray to theItem variable. We declare closureArray 4 times as an anonymous function. The anonymous function in turn declares the predefined write() function, which is passed parameters. Since write() is in closureArray() a closure is created??? During each iteration, theItem is reassigned its value. The four closures reference this value. Since they reference this same value and since this value is reassigned ultimately to the value of the fourth index position, tHe time we execute closureArray later on, all four closures output the same string. This is because all four closures are within the same scope "the same environment" and therefore are referencing the same local variable, which has changed.
I have a couple of problems with this example:
1) I thought a closure is a function that is returned - the inner function is not returned above.
2) theItem is not even a local variable of the parent function (closureArray) - I thought in order for a closure to work, the inner function only accesses the local variables of the outer function, but in this case the local variable is defined OUTSIDE of the parent function.
3) the "the four closures are sharing the same environment." The thing is even in the second example, they are sharing the same environment.
Second example:
// A correct use of closures within loops
var myArray = [“Apple”, “Car”, “Tree”, “Castle”];
var closureArray = new Array();
[code]....
Here we iterate over the length of myArray (4 times), assigning the index of myArray to theItem variable. We also return a function reference to the closureArray during each iteration (closureArray[i]), where i is index number so we assign 4 functon references. So when we iterate through myArray, we immediatelly call the writeItem() fucntion passing an argument of theItem at its current value. This returns a child anonymous function and when that child function is called, it will execute a block that calls the predefined write() method. We assign that returned anonymous function to the variable closureArray. Hence, closureArray holds a reference to that anonymous function. So closureArray during each iteration holds a reference to the anonymous function and we later call closureArray, which in turn calls the anonymous function, therefore calling the predefined write() function to output the local variable of the parent function. This outputs each distinct index of myArray.
This is because since we created the closure, when we call writeItem, passing theItem argument, since theItem is a local variable of the parent function of the closure, it is never destroyed when we later call closureArray (the reference to the child anonymous function)? Yet weren't we using a closure in the first example as well? So whey wasn't those variables preserved?
I don't think it has anything to do with assigning a returned anonymous function to closureArray. Even though an anonymous function creates a new memory position in the javascript engine, therefore not overwriting the other function references we create during the iteration, it's still referring to a local variable declared outside the reference. So if it's about the closure retaining value of parent's local variable even after exiting the parent function allowing for the current indexes to be preserved, then why did the closure in the first example fail to retain each index?
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Aug 16, 2010
point out where my logic is flawed in this? Or where my scripting is wrong?I'm trying to build a standard HTML table with 5 columns across and as many rows down as necessary, to fit all of the images in an array (brought into the DOM via PHP).My goal is to have rows of 5 columns that add on to accomodate up to 50 total images (10 rows).Here's my logic (flawed or not):*Look at the number of tems in the array*If the number is greater than 5, build one full row (of 5 <td>s)*Check again - is the number of items in the array greater than 10?*Build another row*If not, build a partial row, and fill in the rest of the <td>s (less than a full row) with blank spaces.The question is whether or not my logic is being represented in the javascript?unctions in <head>calls to function on lines 149-159Don't mind the formatting, I've blown it up so I can see what's going on.
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Jul 20, 2005
Given an expression f = ƈ*x+3' from a user input I would like to do some sort of:
function userFunction(x):
return f(x)
is it possible with Javascript?
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Oct 20, 2010
I am new to Java and my teacher goes way too fast in class and am a day behind on this calculator. Our assignment is to make a Calculator using AppendDigit and Else if functions in the java code. Some of my other code in html may be messed up as well. I am just lost so here is the HTML:
Code:
<title>John's Calculator</title>
<style type="text/css">
.rt {text-align:right; font-family: Courier New;}
.numbttn {text-align: center; background-color:
silver; font-family: Courier New; width 4eM;}
body {background-color: silver} .....
And Here is the pathetic Javascript which I have barely started:
Code:
// cal Applet- John Falco- 20 October 2010
function clear TB() {
document.form.kpd.display.value="0";
}
function AppendDigit (x) {
if (x==".") {
if ((!HasDecimal))
}
else {
document.forms.kpd.display.value =
document.forms.kdp.display.value + X;
};
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Jun 8, 2009
I would like to simplify some of my jquery code.I have multiple add functions:
Code:
<table1>
<form>
<input type="text" name="title">
[code]...
With this when you click the first one it works but not the second.I worked my way around this but I had to increment add like add1 add2 add3. Now this creates alot of code in my javascript and html.
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Jan 8, 2007
I want to learn more about creating functions for element events
without having to put onclick event in every tag. For example:
<script>
document.getElementsByTagName('input').onclick = function () {
alert('hello');
}
</script>
Now, I know the above does not work as I have tried it but hopefully
the idea of what I am trying to achieve here. Basically for every input
tag, when the user triggers the event (click) it will do the same
function.
Anyway, I would more so like to learn about this type of scripting
where you assign functions to events. However, I dont know what to
search for in google and the like. Where could I learn more about this?
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Aug 17, 2010
i am fairly new to JS for which i am working jQuery but that is for later.right now i am not getting my table printed out when i put input type="text".
here is my code
[Code]...
moreover i m writing this code to later call in a dialog box. using jQuery. but for now why isn't my code being printed with input type. do i have escape "" inside "" like in php? can i make more hierarchy type html in JS, i see when i put the td in next line the code doesn't execute. i guess white spaces have some significance in JS?
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Mar 12, 2010
I'm basically building a javascript/html calculator but I need the calculation to appear gradually in a table, the table need to be 3 columns accross and add a row each time a calculation button is pressed, the first column can remain blank for now but will need to contain a text field eventually, second column needs to show the calculation symbol, third column shows the number. Here's an example:
4+2+7-5=8
|Blank| | 4 |
|Blank| + | 2 |
|Blank| + | 7 |
|Blank| - | 5 |
|Blank| = | 8 |
[Code]...
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Oct 7, 2010
I was wondering if someone could help me. I successfully implemented a number of sortable lists, using a table in html. However I wanted to table cells to be scrollable, which does not apparently work, I tried overflow: auto;, overflow: hidden; and overflow: scroll; in css and it did not work, the table cells kept moving to fit the draggable content. I checked on the internet and found that as stated, table cells cannot be made scrollable. Therefore I decided to do it all with div elements. However I want the div elements structured in a 5 x 3 format. Therefore I thought I would implement it in dom. However I am a newby to dom. I have created the following code, which is simple but repetitive, the function createTable simply creates the div elements (1,2,3,4,5...) and writes the class and id attributes to each. I then appended several of the elements into a div container I created, called divcontainer with a class right. There is also a div element already in the document, class and id = 'right'. I therefore tried to add the divcontainer to this. The function however is causing a page error and none of the dom div elements areI would simply prefer to create the divcontainer and append the div elements. Should I take out the div element right already in the document and instead use something like document.body.appendChild(divcontainer) or something similar. Also the function call createTable() should I use window.onload = function(){} instead.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
[code]....
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Feb 17, 2007
The following code works great on Firefox and not in IE 6.
If I remove the table elements form the variable expor and just output text, the link and the form element and place a <div> with the if form the table and remove teh table it works great, if i put the div inside the table no error but nithing shows on IE. if it put as shown the id on the <table> works in firefox but not in IE I get an unknown runtime error. Is there someway around it? Becuase I want to keep the table for formating purposes as mor fields will be read and shown:
The idea is that the user insert the persons data so afertwards along with some more data it gets summited and in php i get it in DB, but a project can have none or hundres of persons, and always the names are diferent. Code:
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Nov 16, 2011
I am trying to have a table that can have data added to it when a user input there age and data. So far this is my attempt, but it is not working.
<html>
<head>
<script language=javascript>
function sort(){
[Code]....
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Feb 1, 2011
I am pulling 6 pictures using an array. The output is one long horizontal line of pictures. I want the pictures to populate into a table of two rows, with 3 pictures on each row.
How can I do this?
Here is the code:
for (var friendIndex=0; friendIndex<3; friendIndex++)
{
var divContainer = document.createElement("div");
divContainer.innerHTML="<img src='http://graph.facebook.com
[Code].....
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Feb 11, 2010
im having an issue creating a flashing cell within a table and was wondering if anyone could suggest on how i resolve this.When i do use this the background of the cell stays the original background color and i get no error warning from my degugger.
HTML Code:
<table>
<tr>
<td class='flash'>I am Flashing</td>
[code]....
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Aug 4, 2010
I am trying to create a simple HTML table with the squares of numbers and for some reason the loop is not triggering.
Code:
<table border="1">
<tr><td><h2>Table of Squares</h2></td></tr>
<tr><td>
Number
[Code]....
When I run the page all that comes up is the start of the table that is written before the script executes. Also is there any way I could use a debugger to catch this on my own? I tried the firefox debugger but it didn't catch anything when I ran it through, maybe I was just doing it wrong.
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Mar 14, 2011
I am trying to create a js script that will prompt the user for a times table (example the 5 times table, the 7 times table, etc.) & prompt the user for 2 more values; the 'start' number and 'end' number. So there would be 3 numbers total the user must input. The script should present a 'warning' message if the user inputs letters or negative numbers. I have come very close to getting it too work but can't quite get past the last hurdle. Upon entering the 3 numbers, the output should look similar to this: (the 5 times table starting with 1 and ending with 12)
The 5 times table
5 * 1 = 5
5 * 2 = 10
[code]....
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Nov 1, 2011
Im developing a script for dynamically creating html table structure so that from the input that has been given to the function it will fetch the values one by one and will create the structure. My problem is i want to add attributes to the elements created. sample code attached.
with( window['o' + elementname]){
for(j=0;j<attrs.length;j++)
{
if(attrs[j].indexOf("=")!=-1){
[Code]....
here the element name will be get from the parameters passed to the function. i want to verify whether the line in bold is correct or not coz the id is not updated in output.
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Apr 24, 2010
html and javascript and am having problems getting a table to be generated from a given set of rows and cols. I was successful at creating the table, but trying to add functionality such as mouse over is giving me some trouble. I have a feeling its because my variables are out of scope when the function is hit, but can't think of a better way to do it.
function setTable(){
var myElem = document.getElementById('tableDiv');
numRows = 16;
[code].....
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Oct 31, 2011
devolping a javascriptcode for creating a table and inserting images inside it. it should consist of two rows. upper row should contain one image and the lower row should contain 2 small images. not allowed to use html. no borders and no spaces between the images.only with java script.
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Feb 15, 2012
I am looking for creating a grid/table that is editable online. I have browsed online for solutions, but I am short of time & I seem to getting more confused the more I search.
Basically I am trying to create a staff rota that the admin staff can edit online and save out so it is viewable - but not editable by staff members.
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Sep 6, 2011
I have a feeling this is going to get ugly quick but here goes. I havetable rows with dates (IE: Sunday, January 1, 2011). I need to be able to "clone" the rows with this caveat. I need to recalculate the number of rows based on a day/week combination.. ex: September 1st 2011 falls on a Thursday so my pattern would look like this:
[Code]...
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Jul 23, 2005
I currently have an iframe on a webpage into which users can insert content. They can further customise the text as I've included buttons such as Bold, Italic, Bullet point etc. This is done along the lines of
<td><div class="cbtn" onClick="cmdExec('bold',idContent)"
onmouseover="button_over(this);" onmouseout="button_out(this);"
onmousedown="button_down(this);" onmouseup="button_up(this);">
<img hspace="1" vspace=1 align=absmiddle src="images/Bold.gif"
alt="Bold">
</div></td>
But has anyone found a way of creating a table for insertion in an Iframe. A much bigger task I realise but I'm not keen on users copying tables from Word and inserting them into the iframe.
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Nov 4, 2007
i am trying to do but I have no clue how to write it. Im trying to write a while loop that prints out all of the multiples of 5 between 10 and 95. I just need to know how to write the while loop i got everything else.
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Feb 6, 2006
I'm my script I've three loops processing a very huge data file. IE & Firefox show a message box after some time saying my script could be infinite looping and give me a chance to stop it.
Is there a way to prevent this dialog box to show up? I'm writing a script used only on a intranet and the final customer should not see the message box.
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Jan 12, 2007
Hi, I want to have something like this:
function callme1() {
alert('somestuff');
}
function callme2() {
alert('somestuff');
}
function callme3() {
alert('somestuff');
}
function callme4() {
alert('somestuff');
}
etc.
except, it's going to be created in a loop, like
var x=0;
while (x<10) {
function callme[x]() {
alert('somestuff');
}
x++
}
So, out of that I would like to get 10 callme(1-10 or A-J) functions...
I guess I am lost which way to build this with the placement & parsing
of the variables.
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