zh-cn: sync the translayion of "Equality comparisons and sameness" #24195
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(comment last updated: 2024-10-29 06:01:03) |
yin1999
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Oct 27, 2024
files/zh-cn/web/javascript/equality_comparisons_and_sameness/index.md
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| @@ -47,7 +49,7 @@ console.log(obj === null); // false | |||
| console.log(obj === undefined); // false | |||
| ``` | |||
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| 在日常中使用严格相等几乎总是正确的选择。对于除了数值之外的值，严格相等使用明确的语义进行比较：一个值只与自身严格相等。对于数值，严格相等使用略加修改的语义来处理两个特殊情况：第一个情况是，浮点数 0 是不分正负的。区分 `+0` 和 `-0` 在解决一些特定的数学问题时是必要的，但是大部分情况下我们并不用关心。严格相等认为这两个值是全等的。第二个情况是，浮点数包含了 `NaN` 值，用来表示某些定义不明确的数学问题的解，例如：正无穷加负无穷。严格相等认为 `NaN` 与其他任何值都不全等，包括它自己。（等式 `(x !== x)` 成立的唯一情况是 `x` 的值为 `NaN`） | |||
| 使用严格相等几乎总是正确的选择。对于除了数字之外的值，严格相等有着明确的语义：值仅与它自身相等。对于数字，严格相等有着稍微不同的语义处理两个特殊情况：第一个情况是，浮点数 0 是不分正负的。区分 `+0` 和 `-0` 在解决一些特定的数学问题时区分正负是必要的，但是大部分情况下我们并不用关心。严格相等认为这两个值是全等的。第二个情况是，浮点数包含了 `NaN` 值，用来表示某些定义不明确的数学问题的解，例如：正无穷加负无穷。严格相等认为 `NaN` 与其他任何值都不全等，包括它自己。（等式 `(x !== x)` 成立的唯一情况是 `x` 的值为 `NaN`） | |||
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对于数字，严格相等有着稍微不同的语义处理两个特殊情况
对于这句话，我感觉用“使用”更好，“有着”后面一般直接跟宾语（不会额外附加内容了）
| @@ -141,13 +143,13 @@ function sameValueZero(x, y) { | |||
| } | |||
| ``` | |||
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| 零值相等与严格相等的区别在于其将 `NaN` 视作是相等的，与同值相等的区别在于其将 `-0` 和 `0` 视作相等的。这使得它在搜索期间通常具有最实用的行为，特别是在与 `NaN` 一起使用时。它被用于 [`Array.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/includes)、[`TypedArray.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/includes) 及 [`Map`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Map) 和 [`Set`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Set) 方法用来比较键的相等性。 | |||
| 零值相等与严格相等的区别在于其将 `NaN` 视作是相等的，与同值相等的区别在于其将 `-0` 和 `0` 视作相等的。这使得它在搜索期间通常具有最实用的行为，特别是在处理 `NaN` 时。它被用于 [`Array.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/includes)、[`TypedArray.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/includes) 及 [`Map`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Map) 和 [`Set`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Set) 需要比较键的相等性的方法中。 | |||
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| 零值相等与严格相等的区别在于其将 `NaN` 视作是相等的，与同值相等的区别在于其将 `-0` 和 `0` 视作相等的。这使得它在搜索期间通常具有最实用的行为，特别是在处理 `NaN` 时。它被用于 [`Array.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/includes)、[`TypedArray.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/includes) 及 [`Map`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Map) 和 [`Set`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Set) 需要比较键的相等性的方法中。 | |
| 零值相等与严格相等的区别在于其将 `NaN` 视作是相等的，与同值相等的区别在于其将 `-0` 和 `0` 视作相等的。这使得它在搜索期间通常具有最实用的行为，特别是在处理 `NaN` 时。它被用于 [`Array.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/includes)、[`TypedArray.prototype.includes()`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/includes)，以及及 [`Map`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Map) 和 [`Set`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Set) 的需要比较键的相等性的方法。 |
| @@ -1,6 +1,8 @@ | |||
| --- | |||
| title: JavaScript 中的相等性判断 | |||
| title: 相等比较和相同 | |||
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我想到一个数学上的定义，自反性。我理解“性”代表的是抽象。而这里我认为是在指代两个具体的是否相等，是否相同。
…ndex.md Co-authored-by: A1lo <[email protected]>
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已应用评论意见。有异议的地方做了相应的评论。 |
yin1999
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Description
英文版有了更新，对中文版进行同步。
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