diff --git a/po/zh-TW.po b/po/zh-TW.po index 27344f3c..30306126 100644 --- a/po/zh-TW.po +++ b/po/zh-TW.po @@ -5232,7 +5232,7 @@ msgstr "" #: src/methods/example.md:46 src/pattern-matching.md:25 #: src/pattern-matching/match-guards.md:22 src/control-flow/blocks.md:42 msgid "Key Points:" -msgstr "" +msgstr "重點：" #: src/structs.md:33 msgid "" @@ -6406,6 +6406,24 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let x = {\n" +" let y = 10;\n" +" println!(\"y: {y}\");\n" +" let z = {\n" +" let w = {\n" +" 3 + 4\n" +" };\n" +" println!(\"w: {w}\");\n" +" y * w\n" +" };\n" +" println!(\"z: {z}\");\n" +" z - y\n" +" };\n" +" println!(\"x: {x}\");\n" +"}\n" +"```" #: src/control-flow/blocks.md:25 msgid "" @@ -6425,6 +6443,15 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn double(x: i32) -> i32 {\n" +" x + x\n" +"}\n" +"\n" +"fn main() {\n" +" println!(\"doubled: {}\", double(7));\n" +"}\n" +"```" #: src/control-flow/blocks.md:38 msgid "" @@ -6473,6 +6500,16 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let mut x = 10;\n" +" if x % 2 == 0 {\n" +" x = x / 2;\n" +" } else {\n" +" x = 3 * x + 1;\n" +" }\n" +"}\n" +"```" #: src/control-flow/if-expressions.md:18 msgid "" @@ -6495,6 +6532,16 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let mut x = 10;\n" +" x = if x % 2 == 0 {\n" +" x / 2\n" +" } else {\n" +" 3 * x + 1\n" +" };\n" +"}\n" +"```" #: src/control-flow/if-expressions.md:35 msgid "" @@ -6507,7 +6554,7 @@ msgstr "" #: src/control-flow/if-let-expressions.md:1 msgid "# `if let` expressions" -msgstr "" +msgstr "# `if let` 運算式" #: src/control-flow/if-let-expressions.md:3 msgid "" @@ -6517,6 +6564,8 @@ msgid "" "lets you execute different code depending on whether a value matches a " "pattern:" msgstr "" +"[`if let` 運算式](https://doc.rust-lang.org/reference/expressions/if-expr." +"html#if-let-expressions)可讓您根據值是否符合模式，執行不同的程式碼：" #: src/control-flow/if-let-expressions.md:7 msgid "" @@ -6531,6 +6580,16 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let arg = std::env::args().next();\n" +" if let Some(value) = arg {\n" +" println!(\"Program name: {value}\");\n" +" } else {\n" +" println!(\"Missing name?\");\n" +" }\n" +"}\n" +"```" #: src/control-flow/if-let-expressions.md:18 #: src/control-flow/while-let-expressions.md:21 @@ -6540,6 +6599,7 @@ msgid "" "in\n" "Rust." msgstr "" +"如要進一步瞭解 Rust 中的模式，請參閱「[模式比對](../pattern-matching.md)」。" #: src/control-flow/if-let-expressions.md:23 msgid "" @@ -6566,10 +6626,30 @@ msgid "" " Some(item.to_uppercase())\n" " }" msgstr "" +"* `if let` 可以比 `match` 更為精簡，例如只有一個有趣案例時。相對地，`match` " +"必須涵蓋所有分支。\n" +"* 常見用途是在使用 `Option` 時處理 `Some` 值。\n" +"* 與 `match` 不同，`if let` 不會為模式比對支援成立條件子句。\n" +"* 自 1.65 版起，類似的 [let-else](https://doc.rust-lang.org/rust-by-example/" +"flow_control/let_else.html) 結構可以解構指派項目，或在失敗時具有不會傳回的區" +"塊分支 (panic/return/break/continue)：\n" +"\n" +" ```rust,editable\n" +" fn main() {\n" +" println!(\"{:?}\", second_word_to_upper(\"foo bar\"));\n" +" }\n" +" \n" +" fn second_word_to_upper(s: &str) -> Option {\n" +" let mut it = s.split(' ');\n" +" let (Some(_), Some(item)) = (it.next(), it.next()) else {\n" +" return None;\n" +" };\n" +" Some(item.to_uppercase())\n" +" }" #: src/control-flow/while-expressions.md:1 msgid "# `while` loops" -msgstr "" +msgstr "# `while` 迴圈" #: src/control-flow/while-expressions.md:3 msgid "" @@ -6577,6 +6657,8 @@ msgid "" "expr.html#predicate-loops)\n" "works very similar to other languages:" msgstr "" +"[`while` 關鍵字](https://doc.rust-lang.org/reference/expressions/loop-expr." +"html#predicate-loops)的運作方式與其他語言非常相似：" #: src/control-flow/while-expressions.md:6 msgid "" @@ -6594,10 +6676,23 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let mut x = 10;\n" +" while x != 1 {\n" +" x = if x % 2 == 0 {\n" +" x / 2\n" +" } else {\n" +" 3 * x + 1\n" +" };\n" +" }\n" +" println!(\"Final x: {x}\");\n" +"}\n" +"```" #: src/control-flow/while-let-expressions.md:1 msgid "# `while let` loops" -msgstr "" +msgstr "# `while let` 迴圈" #: src/control-flow/while-let-expressions.md:3 msgid "" @@ -6605,6 +6700,9 @@ msgid "" "reference/expressions/loop-expr.html#predicate-pattern-loops)\n" "variant which repeatedly tests a value against a pattern:" msgstr "" +"和 `if let` 的情況一樣，有一個 [`while let`](https://doc.rust-lang.org/" +"reference/expressions/loop-expr.html#predicate-pattern-loops) 變數可針對模式" +"重複測試值：" #: src/control-flow/while-let-expressions.md:6 msgid "" @@ -6619,6 +6717,16 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let v = vec![10, 20, 30];\n" +" let mut iter = v.into_iter();\n" +"\n" +" while let Some(x) = iter.next() {\n" +" println!(\"x: {x}\");\n" +" }\n" +"}\n" +"```" #: src/control-flow/while-let-expressions.md:17 msgid "" @@ -6628,6 +6736,9 @@ msgid "" "will\n" "return `None`. The `while let` lets us keep iterating through all items." msgstr "" +"`v.iter()` 傳回的疊代器會在每次呼叫 `next()` 時傳回 `Option`。疊代器會在" +"完成後才傳回 `Some(x)`，之後則會傳回 `None`。`while let` 可讓我們持續疊代所有" +"項目。" #: src/control-flow/while-let-expressions.md:26 msgid "" @@ -6638,10 +6749,14 @@ msgid "" "The `while let` provides syntactic sugar for the above scenario.\n" " " msgstr "" +"* 請指出只要值符合模式，`while let` 迴圈就會持續運作。\n" +"* 您可以將 `while let` 迴圈重寫為無限迴圈，並加上會在無法為 `iter.next()` 取" +"消包裝值的情況下結束的 if 陳述式。`while let` 可為上述情況提供語法糖。\n" +" " #: src/control-flow/for-expressions.md:1 msgid "# `for` loops" -msgstr "" +msgstr "# `for` 迴圈" #: src/control-flow/for-expressions.md:3 msgid "" @@ -6649,6 +6764,9 @@ msgid "" "related to the [`while let` loop](while-let-expression.md). It will\n" "automatically call `into_iter()` on the expression and then iterate over it:" msgstr "" +"[`for` 迴圈](https://doc.rust-lang.org/std/keyword.for.html)與 [`while let` " +"迴圈](while-let-expression.md)密切相關，會自動在運算式上呼叫 `into_iter()`，" +"然後對其進行疊代：" #: src/control-flow/for-expressions.md:7 msgid "" @@ -6666,10 +6784,23 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let v = vec![10, 20, 30];\n" +"\n" +" for x in v {\n" +" println!(\"x: {x}\");\n" +" }\n" +" \n" +" for i in (0..10).step_by(2) {\n" +" println!(\"i: {i}\");\n" +" }\n" +"}\n" +"```" #: src/control-flow/for-expressions.md:21 msgid "You can use `break` and `continue` here as usual." -msgstr "" +msgstr "您可以照常使用 `break` 和 `continue`。" #: src/control-flow/for-expressions.md:25 msgid "" @@ -6680,10 +6811,15 @@ msgid "" "* Modify the elements in the vector and explain the compiler errors. Change " "vector `v` to be mutable and the for loop to `for x in v.iter_mut()`." msgstr "" +"* 在 Rust 中，索引疊代不是只適用於該情況的特殊語法。\n" +"* `(0..10)` 是實作 `Iterator` 特徵的範圍。\n" +"* `step_by` 這個方法會傳回另一個略過其他所有元素的 `Iterator`。\n" +"* 請修改向量中的元素，並說明編譯器錯誤。將向量 `v` 變更為可變動項，並將 for " +"迴圈變更為 `for x in v.iter_mut()`。" #: src/control-flow/loop-expressions.md:1 msgid "# `loop` expressions" -msgstr "" +msgstr "# `loop` 運算式" #: src/control-flow/loop-expressions.md:3 msgid "" @@ -6691,10 +6827,12 @@ msgid "" "expressions/loop-expr.html#infinite-loops)\n" "which creates an endless loop." msgstr "" +"最後，有一個 [`loop` 關鍵字](https://doc.rust-lang.org/reference/expressions/" +"loop-expr.html#infinite-loops)會建立無限迴圈。" #: src/control-flow/loop-expressions.md:6 msgid "Here you must either `break` or `return` to stop the loop:" -msgstr "" +msgstr "這時您必須執行 `break` 或 `return` 來停止迴圈：" #: src/control-flow/loop-expressions.md:8 msgid "" @@ -6715,6 +6853,22 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let mut x = 10;\n" +" loop {\n" +" x = if x % 2 == 0 {\n" +" x / 2\n" +" } else {\n" +" 3 * x + 1\n" +" };\n" +" if x == 1 {\n" +" break;\n" +" }\n" +" }\n" +" println!(\"Final x: {x}\");\n" +"}\n" +"```" #: src/control-flow/loop-expressions.md:27 msgid "" @@ -6725,10 +6879,13 @@ msgid "" "(unlike\n" " `while` and `for` loops)." msgstr "" +"* 請使用 `break 8` 等值中斷 `loop`，然後顯示出來。\n" +"* 請注意，`loop` 是唯一會傳回重要值的迴圈結構。這是因為系統保證至少會輸入一次" +"此迴圈結構，這一點不同於 `while` 和 `for` 迴圈。" #: src/control-flow/match-expressions.md:1 msgid "# `match` expressions" -msgstr "" +msgstr "# `match` 運算式" #: src/control-flow/match-expressions.md:3 msgid "" @@ -6738,6 +6895,9 @@ msgid "" "works\n" "like a series of `if let` expressions:" msgstr "" +"[`match` 關鍵字](https://doc.rust-lang.org/reference/expressions/match-expr." +"html)是用來將值與一或多個模式進行比對。因此，這個關鍵字的運作方式類似於一系列" +"的 `if let` 運算式：" #: src/control-flow/match-expressions.md:7 msgid "" @@ -6754,12 +6914,26 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" match std::env::args().next().as_deref() {\n" +" Some(\"cat\") => println!(\"Will do cat things\"),\n" +" Some(\"ls\") => println!(\"Will ls some files\"),\n" +" Some(\"mv\") => println!(\"Let's move some files\"),\n" +" Some(\"rm\") => println!(\"Uh, dangerous!\"),\n" +" None => println!(\"Hmm, no program name?\"),\n" +" _ => println!(\"Unknown program name!\"),\n" +" }\n" +"}\n" +"```" #: src/control-flow/match-expressions.md:20 msgid "" "Like `if let`, each match arm must have the same type. The type is the last\n" "expression of the block, if any. In the example above, the type is `()`." msgstr "" +"和 `if let` 一樣，每個比對臂都必須具有相同類型。類型是區塊的最後一個運算式 " +"(如有)。在上述範例中，類型為 `()`。" #: src/control-flow/match-expressions.md:28 msgid "" @@ -6772,6 +6946,13 @@ msgid "" " * We can now use pattern matching to match against the `&str` inside " "`Option`." msgstr "" +"* 請將比對運算式儲存為變數，然後顯示出來。\n" +"* 請移除 `.as_deref()` 並說明錯誤。\n" +" * `std::env::args().next()` 會傳回 `Option`，但我們無法與" +"`String` 進行比對。\n" +" * `as_deref()` 會將 `Option` 轉換成 `Option<&T::Target>`。在我們的案例" +"中，這會將 `Option` 轉換成`Option<&str>`。\n" +" * 我們現在可以使用模式比對，與 `Option` 內的 `&str` 進行比對。" #: src/control-flow/break-continue.md:1 msgid "# `break` and `continue`" @@ -6819,6 +7000,23 @@ msgid "" "}\n" "```" msgstr "" +"```rust,editable\n" +"fn main() {\n" +" let v = vec![10, 20, 30];\n" +" let mut iter = v.into_iter();\n" +" 'outer: while let Some(x) = iter.next() {\n" +" println!(\"x: {x}\");\n" +" let mut i = 0;\n" +" while i < x {\n" +" println!(\"x: {x}, i: {i}\");\n" +" i += 1;\n" +" if i == 3 {\n" +" break 'outer;\n" +" }\n" +" }\n" +" }\n" +"}\n" +"```" #: src/control-flow/break-continue.md:28 msgid ""