noApproximativeNumericConstant

诊断类别：lint/suspicious/noApproximativeNumericConstant

¥Diagnostic Category: lint/suspicious/noApproximativeNumericConstant

JavaScript (and super languages)

自从：v1.3.0

¥Since: v1.3.0

来源：

¥Sources:

与以下相同：approx_constant

¥Same as: approx_constant

使用标准常量而不是近似文字。

¥Use standard constants instead of approximated literals.

通常，标准库中的定义比人们想出的更精确，或者使用的常量超出了数字类型的最大精度。

¥Usually, the definition in the standard library is more precise than what people come up with or the used constant exceeds the maximum precision of the number type.

示例

¥Examples

无效

¥Invalid

let x = 3.141;

code-block.js:1:9 lint/suspicious/noApproximativeNumericConstant  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Prefer constants from the standard library.
  
  > 1 │ let x = 3.141;
      │         ^^^^^
    2 │ 
  
  ℹ Unsafe fix: Use Math.PI instead.
  
    1   │ - let·x·=·3.141;
      1 │ + let·x·=·Math.PI;
    2 2 │

let x = 2.302;

code-block.js:1:9 lint/suspicious/noApproximativeNumericConstant  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Prefer constants from the standard library.
  
  > 1 │ let x = 2.302;
      │         ^^^^^
    2 │ 
  
  ℹ Unsafe fix: Use Math.LN10 instead.
  
    1   │ - let·x·=·2.302;
      1 │ + let·x·=·Math.LN10;
    2 2 │

有效

¥Valid

let x = Math.PI;
let y = 3.14;

let x = Math.LN10;

noApproximativeNumericConstant

示例

无效

有效

相关链接