QStringList can replace int back?

DhanyaRaghav

Hi,
I have QStringList that hold time (say 03:13:23 PM). I shall split and change this to 24 hour format and then replace back to same QString.
QString str("03:13:23 PM");
QStringList hrs = qstrData.split(QRegExp("\ "));
int hours = hrs[1].split(":").first().toInt();
if(str.contains("PM") && hours < 12)
{
hours += 12;
}
hrs[1].replace(hrs[1].split(":").first().length(), str.split(":").first().length(), hours);

This replaces hrs[1][0] = 0; hrs[1][1] = 12; but expected result is hrs[1][0] = 1; and hrs[1][1] = 2;

Can please any one help to get the desired output.
Thanks in advance.

Bonnie

@DhanyaRaghav
You should do some debugging, then you'll find hrs[1] is "PM", not "03:13:23".
Your replace statement is too complicated I haven't check that yet.
Why not use QLocale + QTime? That's much easier, just one line

QLocale::c().toTime(str, "hh:mm:ss A").toString("HH:mm:ss")

Kent-Dorfman

you are reinventing the wheel. Use QTime to read the QString time text into the object, then use the class methods to extract or print in the format you wish.

DhanyaRaghav

@Kent-Dorfman
Thanks for the reply.
Could you please elaborate much more on it.

jsulm

@DhanyaRaghav
https://doc.qt.io/qt-6/qtime.html#fromString - use it to convert your string into QTime
https://doc.qt.io/qt-6/qtime.html#toString - use it to convert QTime into a QString in format you wish

DhanyaRaghav

@jsulm
I have different set of format assigned to qDateTime based on data I receive.

    QDateTime qDateTime, qDateTimeResult;
        qDateTime = QDateTime::fromString(qstrData, "MM/dd/yyyy HH:mm:ss AP");
    qDateTimeResult = QDateTime::fromString(qDateTime.toString(), "MM/dd/yyyy HH:mm:ss");

DateTimeUtc dateTimeUpdate(qDateTimeResult);
if (qDateTimeResult.isValid())
{
}

qDateTimeResult is always invalid, why?

jsulm

@DhanyaRaghav said in QStringList can replace int back?:

qDateTimeResult is always invalid, why?

Probably because your qDateTime.toString() returns a different format than "MM/dd/yyyy HH:mm:ss". Why don't you check that? Simply specify the format you need when you call https://doc.qt.io/qt-6/qtime.html#toString

Bonnie

@DhanyaRaghav You shouldn't use HH with AP, change it to hh.
Also it will be invalid if the running program's default QLocale::amText()/QLocale::pmText() is not AM/PM.
So in my above code I use QLocale::c() which is a simplified English locale to make sure that wouldn't happen.
Here you can use

QLocale::c().toDateTime(qstrData, "MM/dd/yyyy hh:mm:ss AP")