Display only numbers at Last

[ChrisW67]

Show us what you have tried to do with those classes rather than just telling us that you have "used most of the syntax in my application" or that you "have even read the docs". We cannot fix or guide based on what we cannot see.

This is how you show us. Copy the following two lines into a reply:
[code]
[/code]

Then, between the two tags, paste your best attempt at coding the function to validate the input and press Submit Reply.

The solution can be had using only the classes pointed out in this thread. I estimate an equivalent of your script routine consists of less than twenty lines. That depends a little on exactly what "strVarInstance" represents because the script code is, well, odd.

[StarRocks]

Dear Chris,


Thanks for the reply......Please find the below code about how i used one of the syntax for my application.........

QRegExp rxlen("(\\d+)(?:\\s*)([0-9]|[A-Z])");
    int pos = rxlen.indexIn("Length: 1212AP");
 
    if (pos > -1) {
        QString value = rxlen.cap(1); // "189"
        QString unit = rxlen.cap(2);  // "cm"
 
        QString uts = rxlen.cap(3);
 
        qDebug()<<value<<"The Value is";
        qDebug()<<unit<<"The Unit is";
        qDebug()<<uts<<"The Uts is";

QRegExp rxlen("(\\d+)(?:\\s*)([0-9]|[A-Z])");
    int pos = rxlen.indexIn("Length: 1212AP");

    if (pos > -1) {
        QString value = rxlen.cap(1); // "189"
        QString unit = rxlen.cap(2);  // "cm"

        QString uts = rxlen.cap(3);

        qDebug()<<value<<"The Value is";
        qDebug()<<unit<<"The Unit is";
        qDebug()<<uts<<"The Uts is";

To copy to clipboard, switch view to plain text mode 

Thanks in Advance.....Any solution would be appreciable........



Regards,

[wysota]

Your expression reads: one or more digits followed by a 0 or more white spaces followed by a digit or capital letter. There is no cap(3) here. Did you really think this expression would match a string such as "INAP1212"?

Guys i have Vehicle number as INAP1212 now what i need is each and everytime the last four should always be digits and should not be 0000

[StarRocks]

Dear Wysota,


Thanks for the reply......Actually in my code i have commented that line but forgot to do the same in the coding that i have posted........Hope you understood the situation that i have posted.........Any solution would be appreciable.......Thanks in Advance...Actually i am not exactly knowing how to have syntax in that format...


Regards,

[wysota]

So what expression did you code if it wasn't the one you posted?

[ChrisW67]

Concentrate on getting a regular expression that matches 4 or more digits. Once you have that extend it by forcing the match to only occur at the end of the string and you will be most of the way there. You may find an online regular expression tester a useful tool to help learn in conjunction with the Qt docs.

[wysota]

This one is also ok: http://www.regexper.com/

[StarRocks]

Dear Wysota,


Thanks for the reply.......Actually i have done the validation something like this.........Just look the code phrased below

QRegExp rx("([A-Za-z][A-Za-z][0-9][0-9][A-Za-z][A-Za-z][0-9]+)/([A-Za-z]+)");
QValidator *validator = new QRegExpValidator(rx, this);
ui->lineEditVehicleNumber->setValidator(validator);
qDebug()<<"The Vehicle number is"<<rx;

QRegExp rx("([A-Za-z][A-Za-z][0-9][0-9][A-Za-z][A-Za-z][0-9]+)/([A-Za-z]+)");
QValidator *validator = new QRegExpValidator(rx, this);
ui->lineEditVehicleNumber->setValidator(validator);
qDebug()<<"The Vehicle number is"<<rx;

To copy to clipboard, switch view to plain text mode 

But actually i am getting the format which i wanted to have numbers at last but im not satisfied with the coding that i have done......Can anyone remodify it......Thanks in Advance......Any solution would be appreciable.


Regards,

[wysota]

The expression says: "Two letter upper or lower case followed by two digits followed by two letters and at least one digit then the '/' character and any number of lower or upper case letters". Is that what you wanted?

[StarRocks]

Dear Wysota,


Thanks for the reply......Actually i have written the code in the right way what format i need is "AP12QW1234" the last four what ever we are giving should be numbers.......Thanks in advance.........Any solution would be appreciable.......


Regards,

[wysota]

The expression you posted will not match this string. It doesn't have a '/' character anywhere nor does it end with letters. Did you come up with this expression on your own?

[StarRocks]

Dear Wysota,


Thanks for the reply......yep i have done the validation by myself......Thanks in advance.........Any solution would be appreciable.......


Regards,