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Nov 03, 2024 am 06:28 AM

? ?? ?????? ?? ? ????.

??? ??? ?? ????? ??? ??? ????? ?? ?? ?? ??????.

?? ??? ?? ????? ?? ??? ???? ? Python, PHP, JavaScript? ?? ?? ??? ?? ??? ??? ???? ??? ???? ?? ???????.

??? ??? ?? ??? ??? ???? ?? ??? ??? ?? ??? ???? C ? Java? ?? ???????.

  • Python: 2015? ?? 3.5?? ??? ?? ?? ??? 2022? ?? 3.12?? ???????.
  • PHP: 2015? ?? 7? ??? ?? ??.
  • JavaScript: "?? ??? ?? JavaScript"? ??? 2012? TypeScript ???? ???????.

? ?? ??? ???? ????

??? ?? ?? ????? ??? ?? ??? ????? ?????. ??? ????? ???? ? ?? ???? ??? ????, ??? ??? ??? ??? ??? ?? ??? ????? ???? ????.

// C++ example: 'y' will be an integer
float x = 3.14;
int y = x;  //  y = 3 (ignored the decimal part of the number)

??? Python, PHP, JavaScript? ?? ???? ??? ???? ??? ???? ??? ???? ??? ?? ?????? ?? ??? ????? ? ? ????.

# In python and PHP: 'y' will take the same type as 'x'
x = 3.14
y = x  // y = 3.14 (float)

?? ???? ??? ?? ??? ??? ??????

?? ???? ?? ? ?? ?? ??? ???? ??? ??? ?????.

???:

# using the classic syntax:
def add(x, y):
    return x + y
# using explicit typing:
def add(x: int, y:int) -> int:
    return x + y

JavaScript/TypeScript:

// using the classic syntax
function add(x, y) {
    return x + y;
}
// using explicit typing
function add(x: number, y: number): number {
    return x + y;
}

PHP:

// using the classic syntax:
function add($x, $y) {
    return $x + $y;
}
// using explicit typing:
function add(int $x, int $y): int {
    return $x + $y;
}

PHP 8.2(2022? 12? ??)? ??? ???? null, true ? false? ?? ??? ???? ?? ???????.

public null $nil = null;
public false $false = false;`

????? ??? ?????

? ??? ??? ??? ??? ?? ??? ????? ????. ?? ??? ??? ??? ???? ?? ??? ?????. ??? ?? ?? Python?? ?? ??? ???? ?? ?? ??? ????? ????.

x: int = 0
x = "John" 
print(type(x))   # <class 'str'>

PHP? ???? ??? ? ?? ???? ?? ??? ?????.

??? ? ?????? ? ??? ??? ? ??? ????? ??? ?? ????.
??? ?? ???? ??? ?????. ? ??? ???? ? ?? ???? ????. C? ?? ??? ??? ??? ??? ??? ?????.

PHP ???? strict_types? true? ???? ????? ? ? ??? ??? ??? ? ??? ????.

declare(strict_types=1);

Python??? 'mypy' ???? ???? ??? ???? ??? ?? ? ????.

// C++ example: 'y' will be an integer
float x = 3.14;
int y = x;  //  y = 3 (ignored the decimal part of the number)

'mypy'? ??? ??? ????? ???? ????? ? ? ???, ?? ?? ??? ???? ??? ???? ?? ?? ?? ????.

The Irony of Static Typing in Dynamic Languages

?? ??? ???? ???? ?? ???? ???? ???? ?? ??? ?? ? ????.

PHP ? Python? ?? ???? ?? ???? ??? ?????.

# In python and PHP: 'y' will take the same type as 'x'
x = 3.14
y = x  // y = 3.14 (float)

?? ???? ???? ?????

10? ? ?? ???? ???? ??? ????? ?????? ??? ??? ? ?? ?? ??? ?? ???? Python? ????? ??????. ???? ?? ?????? ???? ??????.

?? ??? PEP? ?? ??? ??? ??? ???? ?????? ???? ??? ?? ?? ??? ??? ????? ???? ?????.

??? ??? ???? ?? ??? ???????. ?? ??? ??? ????.

# using the classic syntax:
def add(x, y):
    return x + y
# using explicit typing:
def add(x: int, y:int) -> int:
    return x + y

Python 3.12? ??? PEP 692? ?? ??? ???? ??? ??? ????.

// using the classic syntax
function add(x, y) {
    return x + y;
}
// using explicit typing
function add(x: number, y: number): number {
    return x + y;
}

????? TypedDict? ???? ???? ???, ? ??? ??? ??? ????, Unpack ???? ???? “mypy”?? ??? ??? TypedDict?? ?????.

? ?? ?? ??? ? ?? ??????. ??? ??? ? ??? ??? ? ??? ????.

???? ??? ?? ???? ?? ?? ??? ???? ???? ???? ??? ? ????. ??? ?? ?? ?? ???? ?? ?? ????.

The Irony of Static Typing in Dynamic Languages

?? ???? ????

??? ??? ??? ???? ????? ?? ?????? ?? ???? ??? ???? ??? ???.

??? ??? ??? ??? ????. ? ??? ???? ????? ????:

?? ??????? ?? ??? ?????.

  • ??????, ?????, API ? ?? ???? ???? ???? ??
  • ??? ???? ?? ??? ??? ??
  • ?????? ??? ?? ???? ??

??? ?? ???? ?? ??? ???? ???.

  • ????? ??? ????? ?? ?????? ??????.
  • ?? ??? ?? ??? ?? ??? ??? ???? ?? ??? ?????.
  • ??? ???? ?????(?: ?? ???, ???, ??…).
  • ??? ?? ?? ??? ???? ??

??? ??? ???? ?? ???? ???? ???? ?? ?????. ?, ?? ???? ??? ??? ??? ?? ??? ?????.

? ??? ?? ??? ?? ???? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

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SublimeText3 ??? ??

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??? PHP ?? ?? ??

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