javascript - 对具有加号或减号的字符串进行排序

Question

我想知道除了手动排序以下内容(示例)之外是否还有其他方法:

BBB+
BB
AA+
A-
BB-
A
B
AAA

我们正在尝试将之前的字符串排序如下:

AAA
AA+
A
A-    
BBB+
BB
BB-
B

有没有比较加号和减号先加号的自动排序？

Answer 1

正如我在评论中所述，我们可以将评分更改为数字，这样我们就可以使用基本排序而不是复杂的字母排序。

	const ratings = [
		"BBB+",
		"BB",
		"AA+",
		"A-",
		"BB-",
		"A",
		"B",
		"AAA"
	];
	// Each letter should be enough apart.
	// Technically we can go for smaller numbers.
	// But that can break if not carefull once we start using Moodys or S&P instead of Fitch.
	// Since AA- is lower than AA, the - character has to be a negative number.
	const weights = {
		"A": 10000,
		"B": 1000,
		"C": 100,
		"D": 10,
		"+": 1,
		"-": -1
	};
	const rating_values = ratings
		.map( rating => ( {
			rating,
			"value": rating
				.split( '' )
				.map( character => weights[ character ] )
				.reduce( ( a, b ) => a + b )
		} ) );
	const sorted_ratings = rating_values
		.sort( ( a, b ) => b.value - a.value )
		.map( obj => obj.rating );
	console.log( sorted_ratings );