小编goe*_*tzc的帖子

我在一些python代码中注意到-u用于启动python解释器.我查看了python的手册页,但是我无法从中得到很多.请举个例子.

在Android Studio中启动新项目并选择Tabbed Activity之后,在构建项目后,我在Android Monitor中收到此错误:

E/AndroidRuntime: FATAL EXCEPTION: main
 Process: com.example.app, PID: 23581
 java.lang.IllegalArgumentException: Rect should intersect with child's bounds.
     at android.support.design.widget.CoordinatorLayout.offsetChildByInset(CoordinatorLayout.java:1319)
     at android.support.design.widget.CoordinatorLayout.onChildViewsChanged(CoordinatorLayout.java:1257)
     at android.support.design.widget.CoordinatorLayout$OnPreDrawListener.onPreDraw(CoordinatorLayout.java:1805)
     at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:847)
     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1867)
     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
     at android.view.Choreographer.doCallbacks(Choreographer.java:574)
     at android.view.Choreographer.doFrame(Choreographer.java:544)
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
     at android.os.Handler.handleCallback(Handler.java:733)
     at android.os.Handler.dispatchMessage(Handler.java:95)
     at android.os.Looper.loop(Looper.java:136)
     at android.app.ActivityThread.main(ActivityThread.java:5001)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:515)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
     at dalvik.system.NativeStart.main(Native Method)

这个例外意味着什么,以及如何解决它？这是一个全新的项目,所以我没有做任何改变.

在购买了Real World Haskell这本书之前,我查看了网上的各种Haskell资源.在其他方面非常出色,它似乎没有包含我在所看到的各个网站中提到的列表推导的任何内容.这可能只是因为出于某种原因它们在编写良好的Haskell中通常未被使用,或者它是否更复杂？例如,奇怪的语法可能只是我尚未见过的运算符的一些合并.