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  2. Ternary conditional operator - Wikipedia

    en.wikipedia.org/wiki/Ternary_conditional_operator

    An expression if a then b else c or a ? b : c evaluates to b if the value of a is true, and otherwise to c. One can read it aloud as "if a then b otherwise c". The form a ? b : c is the most common, but alternative syntax do exist; for example, Raku uses the syntax a ?? b !! c to avoid confusion with the infix operators ? and !, whereas in ...

  3. Conditional (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Conditional_(computer...

    If-then-else flow diagram A nested if–then–else flow diagram. The computer science, conditionals (that is, conditional statements, conditional expressions and conditional constructs) are programming language constructs that perform different computations or actions or return different values depending on the value of a Boolean expression, called a condition.

  4. Lua (programming language) - Wikipedia

    en.wikipedia.org/wiki/Lua_(programming_language)

    Marshalling data between C and Lua functions is also done using the stack. To call a Lua function, arguments are pushed onto the stack, and then the lua_call is used to call the actual function. When writing a C function to be directly called from Lua, the arguments are read from the stack. Here is an example of calling a Lua function from C:

  5. Help:Lua for beginners - Wikipedia

    en.wikipedia.org/wiki/Help:Lua_for_beginners

    The script at Module:LuaCall has been written to accept any set of named parameters somename=value, for each one storing the string value in the variable with the name somename, and then allowing you to use these variables as parameters for any function available in Lua. The script then returns only the first value returned by the function (Lua ...

  6. Conditional operator - Wikipedia

    en.wikipedia.org/wiki/Conditional_operator

    In this example, because someCondition is true, this program prints "1" to the screen. Use the ?: operator instead of an if-then-else statement if it makes your code more readable; for example, when the expressions are compact and without side-effects (such as assignments).

  7. Help:Lua debugging - Wikipedia

    en.wikipedia.org/wiki/Help:Lua_debugging

    Even the addition of an extra if-statement for every Lua variable has little drag on speed, compared to slowing a template by perhaps 50% if adding similar if-expressions inside a markup template. Feel free to have many sections of debug-display added into a Lua module, or add several parameter validation tests as extra if-statements to check ...

  8. Dangling else - Wikipedia

    en.wikipedia.org/wiki/Dangling_else

    In other words, someone could interpret the previous statement as being equivalent to either of the following unambiguous statements: if a then { if b then s1 } else s2 if a then { if b then s1 else s2 } The dangling-else problem dates back to ALGOL 60, [1] and subsequent languages have resolved it in various ways.

  9. Template:If then show/doc - Wikipedia

    en.wikipedia.org/wiki/Template:If_then_show/doc

    Template:Ifnoteq then show tests whether the first unnamed parameter is equal to the second unnamed parameter and returns the third unnamed parameter if it does. Otherwise it returns the first unnamed parameter. This is useful when the first parameter is a {{#invoke: of a Lua module that returns a value for which a specific exception is required.