JavaScript - Comparing Elements In An Array To Letters In A String

Hi,

I have an array which is populated by a count of instances from another array, so its ends up with data like:

msg = [2 x this event, 5 x that event, 17 x another event, 22 x something else]

I need to sort this by the number before the 'x'.

At present, a .sort() would put 1 - 9 before anything greater than 10, obviously not what I'm after.

How can I make it put this array into the correct order (e.g 22 x something else, 17 x another event, 5 x that event, 2 x this event)

Thanks!
Ic.

Problem
Part 1.
Gather data from linux server and output to a file named data_DDMMYY
Output file must contain the file name and size

Part 2.
Compare todays data_DDMMYY to yesterdays data_DDMMYY and output results to a file named difference_DDMMYY

Output file must show the difference in size between same named files and identify new and deleted files

Solution
Part 1.
Log into linux, use command "find . -daystart -ctime 0 -type f | xargs ls -sSh > data_DDMMYY"
Sample output:


Part 2.
Perhaps use of an array and iterator? (my knowledge is very limited when it comes to arrays and iterators)

Idea

Grab file 1, go to line 1, read first string and save to variable x, read second string and save to list2

Grab file 2, using the current line in list2, look for a match.

If a match is found, go to that line, read first string and save to variable y

Calculate difference of x-y and save to list1, output first line of list 1 and list 2 to difference_DDMMYY

If match is not found, output <string>.notFound to a new line in difference_DDMMYY

Grab file 1, go to line 2, read first string and save to x, read second string and save to new line in list 2

etc ... until all lines in file 1 have been used.

Then somehow I'd like to find the lines in file 2 that weren't copied to a list and output them to the difference_DDMMYY as <String>.newFile

I'm sure there's some sort of for loop I can use to solve this, but as of right now I'm stumped and need ideas >.<

Any and all help is appreciated.

P.S. I'm new to programming, I'm not sure which language would be best to fix this problem

Hello,

I need your help.

I'd like to structure and build an array like the below.:

Code:

var provinces = [
    ['Ontario','ON'],
    ['Quebec','QC'],
    ['British Columbia','BC'],
    ['Saskatchewan','SK']
];

then, id like to compare the value (x) against my array

ie.

Code:

var x = 'Ontario'


if (x matches the first value in the array 'provinces') { then let x = ON }

How do you write something like this in javascript?

Much thanks and appreciation for all your help,

Cheers,

Jay

I tried the following code based on a post I saw somewhere else about summing all the elements of an array together. When I tried it though I couldn't seem to get it working. Can someone please point out what I did wrong or tell me a different way to sum array elements together? Thanks.
Code:

<script type="text/javascript">

Array.prototype.sum = function() {
for (var i = 0, L = this.length, sum = 0; i < L; sum += this[i++]);
return sum;
}

var myArray=[1,2,3,4,5];

document.write(myArray.prototype.sum);

</script>

Hi again!!
This is my code to add and delete dynamic rows and auto calculate the amount field by multiplying qty and rate.

PHP Code:
<form name="staff_reg" action="<?php echo $_SERVER['PHP_SELF']."?".$_SERVER['QUERY_STRING']; ?>" method="post" enctype="multipart/form-data">

<table width="100%" border="0" cellspacing="0" cellpadding="2">

<table border="0" cellpadding="1" cellspacing="0" class="normal-text" align="left">

<tr align="center">

<td width="10" class="forhead" style="white-space:nowrap;">&nbsp;</td>

<td width="92" class="forhead" style="white-space:nowrap;">Qty</td>

<td width="94" class="forhead" style="white-space:nowrap;">Rate</td>

<td width="94" class="forhead" style="white-space:nowrap;">Amount</td>

</tr>

</table>



<tr align="left">

<td class="forhead" style="white-space:nowrap;"><input type="button" value="Add Row" onClick="addRow('dataTable')" >&nbsp;

<input type="button" value="Delete Row" onclick="deleteRow('dataTable')" ></td>

<table border="0" id="dataTable" cellpadding="1" cellspacing="0" class="normal-text">

<tr>

<td width="10" class="forhead" style="white-space:nowrap;"><input type="checkbox" name="chk[]"/></td>

<td width="92" class="forhead" style="white-space:nowrap;">



<input type="text"  name="qty[]"  style="width:80px;" onblur="">



</td>

<td width="94" class="forhead" style="white-space:nowrap;">



<input type="text"  name="rate[]" style="width:80px;" value=""></td>



<td width="94" class="forhead" style="white-space:nowrap;">



<input type="text"  onblur="getValues('qty[]','rate[]','amt[]')" name="amt[]" style="width:80px;"></td>



</tr>

</table>

<table border="0">

<tr>

<td>Total:</td>

<td><input type="text"  name="total[]" style="width:80px;" value=""></td>

</tr>



<tr>

<td colspan="2">

<input name="Submit" type="submit" value="Save" style="text-decoration:none" />

<input type="reset" value="Cancel" onclick="window.location.href='<?php echo $_SERVER['PHP_SELF'];?>'">

</td>

</tr>

</form>

<script type="text/javascript">



    function getValues(objName,objName2,objName3)

    {    

        var var3 = "";

        var arr = new Array();

        arr = document.getElementsByName(objName);

        arr2 = document.getElementsByName(objName2);

        arr3 = document.getElementsByName(objName3);

        for(var i = 0; i < arr.length; i++)

        {

            for(var i = 0; i < arr2.length; i++)

            {

            for(var i = 0; i < arr3.length; i++)

            {

            

                var obj1 = document.getElementsByName(objName2).item(i);

                var var2 = obj1.value;



                var obj = document.getElementsByName(objName).item(i);

                var var1 = obj.value;



                var obj3 = document.getElementsByName(objName3).item(i);

                var var3 = obj3.value;

                var var4 = var1 * var2;

                document.getElementsByName(objName3).item(i).value=var4;



            }        

            }

        }    

        

    }

    

  function addRow(tableID) {

     var table = document.getElementById(tableID);

     var rowCount = table.rows.length;

     var row = table.insertRow(rowCount);

     var colCount = table.rows[0].cells.length;

           for(var i=0; i<colCount; i++) {

               var newcell = row.insertCell(i);

                newcell.innerHTML = table.rows[0].cells[i].innerHTML;

                //alert(newcell.childNodes);

                switch(newcell.childNodes[0].type) {

                    case "text":

                            newcell.childNodes[0].value = "";

                            break;

                    case "checkbox":

                            newcell.childNodes[0].checked = false;

                            break;

                    case "select-one":

                            newcell.childNodes[0].selectedIndex = 0;

                            break;

                }

            }

        }

        

function deleteRow(tableID)

{

            try

                 {

                var table = document.getElementById(tableID);

                var rowCount = table.rows.length;



                    for(var i=0; i<rowCount; i++) 

                        {

                        var row = table.rows[i];

                        var chkbox = row.cells[0].childNodes[0];

            

                        if (null != chkbox && true == chkbox.checked) 

                            {

                            if (rowCount <= 1) 

                                {

                                alert("Cannot delete all the rows.");

                                break;

                                }

                

                            table.deleteRow(i);

                            rowCount--;

                            i--;

                            }



                        }

                    } catch(e) 

                        {

                        alert(e);

                        }

}



</script>

I would like to know that how can I show the value of all the elements in array "amount" in total field??

Hi Folks - I have a form that has an array of input values:

<input type="text" name=txtValue[] />
<input type="text" name=txtValue[] />

I do this so I can loop through the values in php... now...that's the easy part... the hard part comes to this:

next to each of those boxes is a search button that allows the user to open up a popup window that they can search for an item, and select the item. Once they select the item it should populate that particular input box with the selected item. I can easily do this with a uniquely named input box, but can't seem to figure out how to do it with an array of input boxes... any idea?

Hey All,

I have completed most of a homework assignment that I am working on. I am able to .push desired elements into an array:

Code:

//Insert variable into the Array
function insertElem(){
	//Insert and sort first array, but not second array
	if(nameInput.value != ""){
		studName2.push(nameInput2.value);
	}
	else{
		alert("Value to be inserted cannot be Null");
	}
	
	//Refresh display area
	clearAndShow2();
}

What I would like to do is be able to store and display the created array "permanently" until I decide to remove the elements. My current method to hold the elements, until the page is refreshed, is:

Code:

//Refresh second array
function clearAndShow2(){
	nameInput2.value = "";
	messageBox2.innerHTML = "";
	messageBox2.innerHTML += "Groups: " + "<br />" + studName2.join("<br />") + "<br />";
}

I appreciate the assistance.

Hey guys. I need a little help with checking elements in my array. I created an array of size 50 and initialized all elements to 1. What i want to do is if the user types in the number "1" into the prompt box, i want it to check the first 15 elements and increase only one of the elements by 1, and if the element has already been increased by 1 then i want it to check the next element and see if its been increased, if the element has been increased then it needs to move on to the next one and check that. If the element is 1, then it can be increased by "1", if the element is 2 then i need it to check the next element. If all elements within the first 15 have increased by 1, it should just alert the user that all slots have been assigned. Is there a way to do this? Thanks for your time

Hi,

I'm pulling my hair out to create a simple function!

I am creating an array based on form elements. I then am trying to create an IF (and nested IF) statement to check if the fields are empty and then with the nested IF statement use certain fields to create mathematical functions.

So far I have this:

function QuantityMWh(form) {

var formchk = document.forms[0]
for (i = 0; i < formchk.elements.length; i++) {
if (formchk.elements[1].value == "" && formchk.elements[2].value == "") {
alert("Please fill out all fields.")
break
}
}

}

It's only checking the first field and not the second, and vice versa. i.e. if only one field has text then it passes.

What am I doing wrong?

Thanks.

Hi All,

Simple newbie question here - I want to initialize an array with "myString.length" elements, and I want every element to be prepopulated with "*" instead of blank. Is there any way of doing this? Code:

 

var myString = '123456';

var trialVar = new Array[myString.length]
	
document.write('TEST ' + '<BR><BR>' + trialVar);

(I want every element of trialVar to be "*", I cant just manually add them as myString.length will vary)

Any help would be mega appreciated - thank you

Hi Guys

I am new to javascript programming and I am trying to get elements from one array to another, here is an example of what I am trying to do;

Code:

oneArray[0] = anotherArray[10];

Essentially, moving the data in index 10 of anotherArray to the index 0 of oneArray. I have tried using a variable as a place holder such as;

Code:

placeHolder = anotherArray[10];
oneArray[0] = placeHolder;

I know i'm doing something idiotic somewhere along the line, I just can't figure out what I need to do.

I wrote js functions to reset a php form (multiple questions). The below works:

Code:

function resetForm(){
  	   resetGroup(document.forms[0].answer1);
  	   resetGroup(document.forms[0].answer2);
	}

Answer1 and answer2 are the elements of $_POST array. (<input name="answer1"> in php). In this example, I tried with only two questions, but I have up to 35 questions in one form. Instead of writing the above resetGroup() 35 times, I want to for-loop it. I tried

Code:

function resetForm(){
	   for (var i=1; i<3; i++){
  	   resetGroup(document.forms[0]."answer"+i);
	}

That didn't work. Could someone help me to make the loop work? Or would someone have better or simpler idea? Thanks.

Years ago I created HTML that employs checkboxes and textboxes. I am now writing JS with the intention of adding flexibility and limiting redundancy. I am not sure I truly understand how to correctly interact the two though. For example, one of my scripts have arrays that contain the names of the checkboxes and textboxes, with a 'for' loop to document.write() them to references within the HTML code. This does not seem to be working for me though. Here is what I have thus far (in short):

Code:

<script language="javascript"> 
var teamNames = new Array(3);
 
teamNames[0]="South Africa";
teamNames[1]="Mexico";
teamNames[2]="Uruguay";

for (i=0; i<=31; i++) {
document.write("<p>" + teamNames[i] + "<\/p>");
}
</script>
</head>
<body>
<tr><td>Jun 11</td><td><input type="checkbox" 
name="teamNames[0]" value="teamAbbr[0]"></td>
</body>

I've left out a lot of the code (to include the teamAbbr array, but you get the points. I've tried moving the JS within the HTML body and playing with the reference syntax, but nothing so far. Any help would be great!