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ci: fix long lines/links in docs.md
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doc/docs.md
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doc/docs.md
@ -2278,22 +2278,23 @@ Note that the embedded struct arguments are not necessarily stored in the order
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## Functions 2
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## Functions 2
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### Immutable function args by default, mutable args have to be marked on call
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### Immutable function args by default
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In V function args are immutable by default, mutable args have to be marked on call.
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In V function arguments are immutable by default.
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Since there are also no globals, that means that functions' return values are a function of their
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arguments only, and their evaluation has no side effects (unless the function uses I/O).
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Function arguments are immutable by default even when [references](#references) are passed.
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Since there are also no globals, that means that the return values of the functions,
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are a function of their arguments only, and their evaluation has no side effects
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(unless the function uses I/O).
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V is not a purely functional language however.
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Function arguments are immutable by default, even when [references](#references) are passed.
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Note that V is not a purely functional language however.
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There is a compiler flag to enable global variables (`-enable-globals`), but this is
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There is a compiler flag to enable global variables (`-enable-globals`), but this is
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intended for low-level applications like kernels and drivers.
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intended for low-level applications like kernels and drivers.
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### Mutable arguments
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### Mutable arguments
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It is possible to modify function arguments by declaring them with the keyword `mut`:
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It is possible to modify function arguments by using the keyword `mut`:
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```v
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```v
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struct User {
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struct User {
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@ -2312,7 +2313,7 @@ user.register()
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println(user.is_registered) // "true"
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println(user.is_registered) // "true"
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```
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```
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In this example, the receiver (which is simply the first argument) is marked as mutable,
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In this example, the receiver (which is just the first argument) is explicitly marked as mutable,
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so `register()` can change the user object. The same works with non-receiver arguments:
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so `register()` can change the user object. The same works with non-receiver arguments:
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```v
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```v
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@ -3600,8 +3601,8 @@ println(compare(1.1, 1.2)) // -1
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## Concurrency
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## Concurrency
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### Spawning Concurrent Tasks
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### Spawning Concurrent Tasks
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V's model of concurrency is going to be very similar to Go's. For now, `go foo()` runs `foo()` concurrently in
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V's model of concurrency is going to be very similar to Go's.
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a different thread:
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For now, `go foo()` runs `foo()` concurrently in a different thread:
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```v
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```v
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import math
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import math
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@ -3617,8 +3618,8 @@ fn main() {
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}
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}
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```
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```
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> In V 0.4 `go foo()` will be automatically renamed via vfmt to `spawn foo()`, and there will be a way to launch
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> In V 0.4 `go foo()` will be automatically renamed via vfmt to `spawn foo()`,
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a coroutine (a lightweight thread managed by the runtime).
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and there will be a way to launch a coroutine (a lightweight thread managed by the runtime).
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Sometimes it is necessary to wait until a parallel thread has finished. This can
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Sometimes it is necessary to wait until a parallel thread has finished. This can
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be done by assigning a *handle* to the started thread and calling the `wait()` method
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be done by assigning a *handle* to the started thread and calling the `wait()` method
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