检查数组javascript中是否有字符串 [英] Check if string inside an array javascript

问题描述

如果我有一个日期名称的数组，我想检查一下如果 sunday - 首字母资本或者小 - 在这个数组中最好的做法是什么？

If i had an array of days names and i wanted to check for example if sunday - first letter capital or small - in this array what would be the best thing to do ?

推荐答案

您也可以使用 Array.indexOf ：

You may also use Array.indexOf:

var days = ["monday",
            "tuesday",
            "wednesday",
            "thursday",
            "friday",
            "saturday",
            "sunday"];

function isInArray(days, day) {
    return days.indexOf(day.toLowerCase()) > -1;
}

isInArray(days, "Sunday");  // true
isInArray(days, "sunday");  // true
isInArray(days, "sUnDaY");  // true
isInArray(days, "Anyday");  // false

检查 MDN 。

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