我有一个枚举:
const ingredients = {
BREAD_BOTTOM: 'BreadBottom',
BREAD_TOP: 'BreadTop',
MEAT: 'Meat',
BACON: 'Bacon',
CHEESE: 'Cheese',
SALAD: 'Salad'
};
现在,我想使用此枚举创建一个配料列表,例如:
listOfIngredients: {
ingredients.BREAD_TOP: 1,
ingredients.BACON: 1,
ingredients.CHEESE: 2,
ingredients.MEAT: 2,
ingredients.BREAD_BOTTOM: 1,
}
我尝试了诸如${ingredients.BREAD_TOP}
之类的一些变体,但是我无法使成分列表将枚举值作为关键
答案 0 :(得分:6)
在将键用作键之前,可以将键包装在[]
中以评估其值
const listOfIngredients: {
[ingredients.BREAD_TOP]: 1,
[ingredients.BACON]: 1,
[ingredients.CHEESE]: 2,
[ingredients.MEAT]: 2,
[ingredients.BREAD_BOTTOM]: 1,
}
要访问值,只需执行以下操作:
console.log(listOfIngredients[ingredients.BREAD_TOP]);
这是一个片段:
let ingredients = {
BREAD_BOTTOM: 'BreadBottom',
BREAD_TOP: 'BreadTop',
MEAT: 'Meat',
BACON: 'Bacon',
CHEESE: 'Cheese',
SALAD: 'Salad'
};
const listOfIngredients= {
[ingredients.BREAD_TOP]: 1,
[ingredients.BACON]: 1,
[ingredients.CHEESE]: 2,
[ingredients.MEAT]: 2,
[ingredients.BREAD_BOTTOM]: 1
};
console.log(listOfIngredients[ingredients.BREAD_TOP]);