golang的反射功能，在很多场景都会用到，最基础的莫过于rpc、orm跟json的编解码，更复杂的可能会到做另外一门语言的虚拟机。通过反射模块，我们可以在编程语言的runtime运行时期间去访问内部产生对象的信息。了解反射
I have a bunch of image URLs. I have to download these images and display them in my application one-by-one. I am saving the images in a Collection using SoftReferences and also on Sdcard to avoid ref
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