On Aug 22, 6:33 pm, David Philp <[EMAIL PROTECTED]> wrote: > >>>> map(lambda x: x>0 and x or 0, data) > > [0, 2, 3] > > Can someone translate that "lambda x: x>0 and x or 0" into William's > "the words in your head" please?
I suspect this is coming from someone who learned python before it acquired a conditional expression and illustrates why it was introduced. The alternative >>> map(lambda x: x if (x>0) else 0, data) reads a little more comfortably for me as: "Apply the function that, given x, returns x itself if x>0 and 0 otherwise, to each element of data" It is rather cool to see that the whole ... if ... else ... construct is not necessary and that the ... ? ... : ... from C can be encoded in the exact same order in python if you are willing to read ? for "and" and : for "or". --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
