# 管道運算符 [](https://gezf7g7pd5.execute-api.ap-northeast-1.amazonaws.com/default/source_up_to_date?owner=erg-lang&repos=erg&ref=main&path=doc/EN/syntax/32_pipeline.md&commit_hash=c8932f8fd75cc86f67421bb6b160fffaf7acdd94) 管道運算符的使用方式如下: ```python assert f(g(x)) == (x |> g() |> f()) assert f(g(x, y)) == (x |> g(y) |> f()) ``` 換句話說,`Callable(object)`的順序可以更改為`object |> Callable()` 管道運算符也可用于方法。對于方法,`object.method(args)`更改為`object |>.method(args)` 它看起來只是更多的`|>`,但由于粘合強度較低,您可以減少`()`的數量 ```python rand = -1.0..1.0 |>.sample!() log rand # 0.2597... 1+1*2 |>.times do log("a", end := "") # aaa evens = 1..100 |>.iter() |>.filter i -> i % 2 == 0 |>.collect Array # 在沒有管道操作符的情況下實現, _evens = (1..100).iter().filter(i -> i % 2 == 0).collect(Array) # or __evens = 1..100 \ .iter() \ .filter i -> i % 2 == 0 \ .collect Array ```