if-statement

Swift switch statement for matching substrings of a String

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I had a similar problem today and realized this question hasn’t been updated since Swift 1! Here’s how I solved it in Swift 4: switch self.descriptionWeather.description { case let str where str.contains(“Clear”): print(“clear”) case let str where str.contains(“rain”): print(“rain”) case let str where str.contains(“broken clouds”): print(“broken clouds”) default: break }

Why is if True slower than if 1?

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True and False are not keywords in Python 2. They must resolve at runtime. This has been changed in Python 3 Same test on Python 3: >>> timeit.timeit(‘test1()’,setup=”from __main__ import test1″, number=10000000) 2.806439919999889 >>> timeit.timeit(‘test2()’,setup=”from __main__ import test2″, number=10000000) 2.801301520000038 >>> timeit.timeit(‘test3()’,setup=”from __main__ import test3″, number=10000000) 2.7952816800000164 >>> timeit.timeit(‘test4()’,setup=”from __main__ import test4″, number=10000000) 2.7862537199999906 Time … Read more

if statement integer

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negative or positive. Anything that’s not a 0 is a true value in if Also, Consider a negative number: -1 -1 in C internally is represented as: 0xFFFFFFFF, in which case, it would be a positive number if I cast it to unsigned integer. But after the advent of C99 standard compilers, I suggest you … Read more

Is there a better way to write nested if statements in python? [closed]

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Insert all the valid combinations to a dictionary of tuples, and if the combination is not there, return 0: def convert_what(numeral_sys_1, numeral_sys_2): numeral_dict = { (“Hexadecimal”, “Decimal” ) : 1, (“Hexadecimal”, “Binary” ) : 2, (“Decimal”, “Hexadecimal”) : 4, (“Decimal”, “Binary” ) : 6, (“Binary”, “Hexadecimal”) : 5, (“Binary”, “Decimal” ) : 3 } return … Read more

C macro: #if check for equality

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Another way to write your code uses chained #elif directives: #if choice == 3 … #elif choice == 4 … #else #error Unsupported choice setting #endif Note that if choice is not #defined, the compiler (preprocessor) treats it as having the value 0.