Modern and trendy abstract background. Geometric texture for your design (colors used: blue, black). Vector Illustration (EPS10, well layered and grouped), wide format (3:2). Easy to edit, manipulate, ...

透過免版稅授權，只需付款一次即可持續將版權圖片及錄像片段用於私人及商業專案，而無需在每次使用有關內容時額外付款。這是雙贏局面，因此 iStock 上的所有內容（包括所有互聯網圖片及 ...

Design patterns have evolved to solve problems often encountered in software applications. The factory method design pattern and the abstract factory design pattern are both creational patterns.