duplicate values

[intscript]

Hello Everbody,

Please help me to catch the duplicate values. here is my script

function catchDuplicate()
{
with(document.form)
{

for (i=0; i < 26; i++)
Value = (document.getElementById("txtNoOfProcess" + i ).value = '' )

}
}


But I dont kow how I can pass the value to an array, so i can check if there's an duplicate value...

[acoder]

Create 2 new arrays.

Then as you are looping through the form values, use one array to store the non-duplicate values and the other to store the duplicate values.

To find out if a value is a duplicate, write a function which checks the non-duplicate array for the same value. If it's not present add it to that array, otherwise add it to the duplicate array (or, if you want to identify the form text box which contains the duplicate values, store the i value instead).

Read about arrays here.

[intscript]

Create 2 new arrays.

Then as you are looping through the form values, use one array to store the non-duplicate values and the other to store the duplicate values.

To find out if a value is a duplicate, write a function which checks the non-duplicate array for the same value. If it's not present add it to that array, otherwise add it to the duplicate array (or, if you want to identify the form text box which contains the duplicate values, store the i value instead).

Read about arrays here.

Here is my revised code, what is the error in this code? I can't pass the value to the arr[0]. I I can pass the value entered to the arr[0] the next time the user will input the value, it will check if there's a value stored in an array, so that alert message will prompt for the duplicate value. Thanks.

function check_Duplicate()
{
with(document.form)
{

var arr = new Array()

arr[0] = 0

for (i=0; i < hidNoOfProcess.value ; i++)

var propVals = document.getElementById("txtSeries" + i ).value

arr[0] = propVals


if( propVals == arr[0] ) {
alert("This is a duplicate value" +
"\n Please create another" );
return false;
}

}
}

[mrhoo]

function check_Duplicate(){
var arr = new Array(),count=0,L;
for (i= 0; i < 26 ; i++){
    var propVals = document.getElementById("txtSeries" + i ).value
    L= arr.length;
    count= 0;
    while(count<L) if(arr[count++]===propVals){
        alert(propvals+"  is a duplicate value"+
        " \n Please create another" );
 
        return false;
    }
    arr.push(propVals)
}
return true;
}

[intscript]

function check_Duplicate(){
var arr = new Array(),count=0,L;
for (i= 0; i < 26 ; i++){
    var propVals = document.getElementById("txtSeries" + i ).value
    L= arr.length;
    count= 0;
    while(count<L) if(arr[count++]===propVals){
        alert(propvals+"  is a duplicate value"+
        " \n Please create another" );
 
        return false;
    }
    arr.push(propVals)
}
return true;
}

Thanks but I encountered error on first input of value it returns "is a duplicate value, second value is the same message , third value and so on and still prompting the error message however it still accepting duplicate values.

Thanks

[intscript]

Please help to store the value in a array

i have this code

function duplicate()
{
var arr = new Array()

for (i = 0; i < 26 ; i++)
{
// I want to pass this value to the array

Vals = document.getElementById("txtSeries" + i)

// if this value is already in the array, message error will prompt
alert('Value already exist')
break;

}


}

[acoder]

Merged threads.

[acoder]

Use

arr.push(Vals)

as suggested by mrhoo.