JS 生成26个大小写字母

//生成大写字母  A的Unicode值为65
function generateBig_1(){
    var str = [];
    for(var i=65;i<91;i++){
        str.push(String.fromCharCode(i));
    }
    return str;
}
//生成大写字母  a的Unicode值为97
function generateSmall_1(){
    var str = [];
    for(var i=97;i<123;i++){
        str.push(String.fromCharCode(i));
    }
    return str;
}
//将字符串转换成Unicode码
function toUnicode(str){
    var codes = [];
    for(var i=0;i<str.length;i++){
        codes.push(str.charCodeAt(i));
    }
    return codes;
}

function generateSmall(){
    var ch_small = 'a';
    var str_small = '';
    for(var i=0;i<26;i++){
        str_small += String.fromCharCode(ch_small.charCodeAt(0)+i);
    }
    return str_small;
}

function generateBig(){
    var ch_big = 'A';
    var str_big = '';
    for(var i=0;i<26;i++){
        str_big += String.fromCharCode(ch_big.charCodeAt(0)+i);
    }
    return str_big;
}

console.log(generateBig());
console.log(generateSmall());

console.log(toUnicode(generateBig()));
console.log(toUnicode(generateSmall()));

console.log(generateBig_1());
console.log(generateSmall_1());