Difference Between Flex 3 and Flex 4

Flex 3 and Flex 4 are two different versions of the Adobe Flex software development kit. Here are some key differences between the two:

• Component Set: Flex 4 introduced a new component architecture known as Spark with enhanced capabilities compared to the Halo components used in Flex 3.
• Skinning and Styling: Flex 4 offers better support for skinning and styling through the use of FXG graphics, allowing for more flexibility and customization of visual elements.
• Layout Options: Flex 4 introduced new layout options like the Group and DataGroup containers, providing more efficient ways to manage the layout of user interface elements.
• Performance Improvements: Flex 4 includes performance optimizations and enhancements that make applications run faster and more efficiently compared to Flex 3.
• Compiler and Language Features: Flex 4 introduced new compiler options and language features such as the improved binding syntax and declarative data access.

Overall, Flex 4 offers a more modern and efficient development experience compared to Flex 3, with enhanced component architecture, styling capabilities, layout options, performance improvements, and language features.