@kshegunov Is append() not safe to call while using an iterator on the same list? Nope. Append can (and often will) realloc to accommodate the new elements, so the old memory gets invalidated. Since you use a mutable iterator, can't you use that to append to the list? Thank you so much! I wasn't sure that was possible. I guess I missed that in the documentation. For those who might have the same problem or are looking to do the same thing with a TextEdit field: instead of using append, I used QMutableStringListIterator::insert().

@Thanos thanks for your feedback. So please mark this topic as SOLVED now.

@Lasith Your problems: You only once call the returning function of the index, and in the designer. (In fact, when ui->name text changes, the function should be called every time.) @Lasith said in Getting QStringList text to line edit based on a string inserted on another line edit: QString index; Name=ui->name->text(); for(int i=0;i<names.size();i++) { if(names[i]==Name){ index=i; } You want the string but in your cycle the 'i' of the integer. Why do not you pay attention to this(index = i)? Try compile the app? If yes, the compiler would inform you about it. From your profile it seems that you are using Qt too several months. But it does not seem to be at all. Do not try to conquer the peak, learn to walk first.

@Lasith well std::bad_alloc often comes when out of memory. My guess is that <List1[0].size() is always true since you add to it for each loop and hence create an infinite loop. Did you try VRonin code? Update: If you just want list1 in [0] and list2 in[1] why all the loops then?

@kshegunov said in increasing QList<QStringList> contents twice!: if it looks like a duck, swims like a duck, and quacks like a duck Slight thread derail, but I would say the op's question general is answered .

@jsulm thanx bro :)

Hi, To add to @dream_captain, in case of an error, at least print the error string from the query so you know what went wrong.

@JNBarchan yeah they are nested for loops!

Hi Normally its the that can give "index out of range error" not when inserting ?

@J.Hilk Thanx alot

@jsulm Got it solved it was in the textfile that I used to read into the QList because the value I gave is more than the number of elements in the text file that I read!

@SGaist Dman that was silly mistake :(

@SGaist Thanx mate

@Avec Oh duh.. I should have thought of that as a potential reason. I just assumed that you were in the directory with the files as your current dir. Glad it's all solved. :)

I can't say that I understood your code, but if you'll change the return value of your reading method (read(), I presume) to QStringList, then you can display it with ListView in QML like this: ListView { //Layout.preferredHeight: childrenRect.height model: myFile.read() delegate: Text { text: modelData } }

I too was also thinking of full rewrite but i don't have much time for that right now :/ .

I've got some reading to do :) Thanks @SGaist

Hi, There's usually no need to allocate QList nor QStringList on the heap. Do you have any reasons to do that ?

Thanks. It worked

You can use a regular expression in a loop: QString s = "806982"; QRegExp re("([\\da-fA-F]{2})"); // exactly 2 hex digits QStringList l; int pos = 0; while ((pos = re.indexIn(s, pos)) != -1) { l << re.cap(1); pos += re.matchedLength(); }

#include <QApplication> #include <QTextEdit> #include <QDebug> #include <QPalette> #define SET_BG_COLOR(edit, color)\ QPalette palette;\ palette.setColor(QPalette::Base, (color));\ palette.setColor(QPalette::Text, (color) == Qt::red ? Qt::white : Qt::black);\ (edit).setPalette(palette); // вот функция которая тебе нужна // возвращает: // -1: одна из строк пустая // 0: не нашли // 1: нашли int findText(const QString &textEdit, const QString &textFile){ // если один из текстов пустой if(!textEdit.length() || !textFile.length()){ return -1; } // означает: читать строку до символа разделителя, включает (пробел, -, _) QRegExp rx("[^ \\-_]*"); // находим строку до разделителя if (rx.indexIn(textEdit) != -1){ // отрезаем строку до разделителя" QString find = textEdit.left(rx.matchedLength()); // производим поиск в тексте return textFile.indexOf(find) != -1; } return 0; } int main(int argc, char *argv[]) { QApplication app(argc, argv); const QString textFile = "Помогите плиз, нужно с текста в textEdit выбрать " "слово и проверить есть ли такое слово в " "файле, собственно мне нужна помощь с textEdit не могу " "понять как взять из него слово до " "разделительного символа и ввести его в переменную типа QString"; QTextEdit edit; // при изменении текста будем делать проверку QObject::connect(&edit, &QTextEdit::textChanged, [&edit, &textFile](){ QColor color = Qt::white; switch(findText(edit.toPlainText(), textFile)){ case -1: break; // цвет по умолчанию белый case 0: color = Qt::red; break; case 1: color = Qt::green; break; } SET_BG_COLOR(edit, color); }); edit.show(); return app.exec(); }

@JKSH thanks :)

Dzięki za szybką odpowiedź. Problem rozwiązany zamiast QPixmap, użyłem QImage i metody drawImage(). Nadal nie mam pojęcia dlaczego QPixmap nie działa. QStringList zawiera ścieżki, a obrazy są formatu .jpg