void QWidget::setTabOrder ( QWidget * first, QWidget * second) [static]Puts the second widget after the first widget in the focus order.Note that since the tae second widget is chan
Incomputer science, aprogramming languageis said to havefirst-class functionsif it treatsfunctionsasfirst-class citizens. Specifically, this means the language supports passing functions as arguments to other functions, returning them as the values from other functions, and assigning them to variabl
emplace返回值一个pair逻辑组件如果已插入那就是真的, 如果映射已经包含值相同地排序的元素就是假的. 返回值的迭代器元素对返回插入新元素的地址 (如果 bool 元素为 true) 或已找到其中的元素 (如果 bool 元素是假)。If the function successfully inserts the element (because no equivalent element existed already in theset), the function re...
