language-specifications

问题 In C / C# / etc. you can tell the compiler that a literal number is not what it appears to be (ie., float instead of double , unsigned long instead of int : var d = 1.0; // double var f = 1.0f; // float var u = 1UL; // unsigned long etc. Could someone point me to a list of these? I\'m specifically looking for a suffix for short or Int16 . 回答1: var d = 1.0d; // double var d0 = 1.0; // double var d1 = 1e+3; // double var d2 = 1e-3; // double var f = 1.0f; // float var m = 1.0m; // decimal var i

问题 Can you add new statements (like print , raise , with ) to Python\'s syntax? Say, to allow.. mystatement \"Something\" Or, new_if True: print \"example\" Not so much if you should , but rather if it\'s possible (short of modifying the python interpreters code) 回答1: You may find this useful - Python internals: adding a new statement to Python, quoted here: This article is an attempt to better understand how the front-end of Python works. Just reading documentation and source code may be a bit

问题 Is it guaranteed that False == 0 and True == 1 , in Python (assuming that they are not reassigned by the user)? For instance, is it in any way guaranteed that the following code will always produce the same results, whatever the version of Python (both existing and, likely, future ones)? 0 == False # True 1 == True # True [\'zero\', \'one\'][False] # is \'zero\' Any reference to the official documentation would be much appreciated! Edit : As noted in many answers, bool inherits from int . The