/** 获取一组字符串中的公共前缀 */
export function getCommonPrefix(strings: string[]) {
    if (!Array.isArray(strings)) {
        throw new Error("getCommonPrefix expects an array of strings")
    }

    var first = strings[0] || ""
    var commonLength = first.length

    for (var i = 1; i < strings.length; ++i) {
        for (var j = 0; j < commonLength; ++j) {
            if (strings[i].charAt(j) !== first.charAt(j)) {
                commonLength = j
                break
            }
        }
    }

    return first.slice(0, commonLength)
}