Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An evaluation strategy in which the arguments to a function are evaluated first, and the result is passed into the function.

Etymologies

Sorry, no etymologies found.

Examples

  • We will look into last one - capturing in call-by-value mode.

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  • With this keyword, we put all by-value captured variables into call-by-value mode.

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  • I assume that you know that call-by-value, by reference and by constant reference mean.

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  • This is similar to call-by-value mechanism used in function calls.

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  • Because of the call-by-value nature of the languages we're talking about, the expression used for the source parameter will be fully evaluated (not the same as enumerated!) before Let gets called, so we can feed it (again in a call-by-value manner) to the function which then can refer to it multiple times by means of its lambda expression parameter (in the sample above this is "xrs").

    B# .NET Technical Community Homepage

  • For that very reason, side-effect permitting languages have a much harder time carrying out optimizations to code and need to be very strict about specifying the order in which operations are performed (e.g. in C#, arguments to a method call - which is always "call-by-value" - are evaluated in a left-to-right order).

    B# .NET Technical Community Homepage

  • We said at the beginning that the reason we cannot use functions and methods to represent everything we can write in code is because Ruby uses call-by-value to pass parameters to functions.

    raganwald

  • This technique gets us almost all of what we want for this common case of wanting to work around call-by-value semantics.

    raganwald

  • Ruby (and most other languages in use these days) uses call-by-value when it passes parameters to functions.

    raganwald

  • But there's no way I want to be writing all that out by hand every time I want to implement a function but work around call-by-value semantics.

    raganwald

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