When to use If-else if-else over switch statements and vice versa
Aug 13, 2017 · The more values you add requires the jump tables to be larger and the switch becomes less efficient (not than an if/else, but less efficient than the comparatively simple switch statement). Also, if the values are highly variant ( i.e. instead of 1 to 10, you have 10 possible values of, say, 1, 1000, 10000, 100000, and so on to 100000000000 ...
c++ - How to use IF in Switch statement - Stack Overflow
Jul 16, 2012 · The switch statement is used to execute one block of code dependent on a particular value. In a sense, the switch statement can be thought of as a form of an if statement: the code. switch (avg) { case 1 : { /* code block 1 */ } break; case 2 : { /* code block 2 */ } break; default : { /* code block default */ } break; } can be read as
What is the runtime complexity of a switch statement?
Aug 15, 2016 · The big-O complexity of a switch statement is not really the important point. Big-O notation refers to the performance as n increases towards infinity. If you have a switch statement big enough that the asymptotic performance is an issue then it is too big and should be refactored.
Switch statement inside a switch statement? - Stack Overflow
Feb 15, 2018 · This is not always possible, and if you must use switch statements then I would not put another nested switch statement (or a collection of if statements) but would probably have a method call which would contain that logic. If you post a bit more detail on what you are trying to do then we might be able to offer better suggestions.
How to write a switch statement in Ruby - Stack Overflow
Jun 4, 2009 · Also see "Switch statement" on Wikipedia. Quoted: case n when 0 puts 'You typed zero' when 1, 9 puts 'n is a perfect square' when 2 puts 'n is a prime number' puts 'n is an even number' when 3, 5, 7 puts 'n is a prime number' when 4, 6, 8 puts 'n is an even number' else puts 'Only single-digit numbers are allowed' end
Use an array as a case statement in switch - Stack Overflow
Dec 18, 2013 · I'd compute a value based on the sequence of the elements in the boolean array, i.e. [true, false, true, true] would evaluate to 1011 and then based on this integer value you can use switch statement.
Why can't variables be declared in a switch statement?
Sep 18, 2008 · It appears that anonymous objects can be declared or created in a switch case statement for the reason that they cannot be referenced and as such cannot fall through to the next case. Consider this example compiles on GCC 4.5.3 and Visual Studio 2008 (might be a compliance issue tho' so experts please weigh in)
How to write switch statement with "or" logic? - Stack Overflow
Mar 10, 2013 · Below, I have created a simple switch statement that works fine. I was wondering how I could change this code so it is switch(c), then case 1, case 2, case 3, default. Example: if char is 'w' || char is 'W' return WHITE. I tried a simple if statement and it wasn't giving me the correct output despite it compiling successfully. Hope you can help ...
use string "includes ()" in switch Javascript case
Apr 15, 2017 · This is more a curiosity question to understand the possibilities of switch / case, as in this particular case I have solved my problem using const type = databaseObjectID.split('/')[0]; and apply the switch case on type
What is the alternative for switch statement in Lua language?
The actions I want to take in my different switch cases are all defined as anonymous functions in a table. The keys used (e.g. 08 here) are the values our variable to switch on might assume (opcode here). The default case of the switch statement happens in my else clause.