The intersection of a table row and a column is called a cell 表格中行與列的交叉處叫“單元格” ,
For each call pair , the cell that intersects them is incremented the call count 對于每個調用對來說,行與列的交叉點不斷進行累加(調用次數) 。
Relational data is " flat " - that is , organized in the form of a two - dimensional array of rows and columns 關系數據是“平面的” ,即它是以具有行與列的二維數組的形式組織的。
Arrays , whether local or class - level , are always initialized . ( 24 ) strings are initialized to null , not empty string . ( 25 ) an empty string is not the same as a null string . ( 26 ) a declaration cannot be labelled 這句話是說:多維數組中子數組不一定必須有一定個數的元素,比如我們把一個二維數組看成一個矩陣,那么行與列中的元素可以不完整,可以不對齊