te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Japanese Detecting Full-Width characters - Stack Overflow

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    I need to disallow writing full-width Japanese characters in input field, half-width are ok and any other symbols are ok except fullwidth ones.

    Here I found regex for full-width Katakana (zenkaku 全角) is it enough ? Currently my code looks like this

    if ( /[ァ-ヶ]/.test("カナ") ) {
  console.log('full width');
}else{
  console.log('not full width');
}

    I'm not familiar with Japanese so I don't know what else I have to check also, I mean they have katakana, hiragana and so on that 's why I'm not sure my script is good enough, please let me know what do you think

    I need to disallow writing full-width Japanese characters in input field, half-width are ok and any other symbols are ok except fullwidth ones.

    Here https://gist.github./terrancesnyder/1345094 I found regex for full-width Katakana (zenkaku 全角) is it enough ? Currently my code looks like this

    if ( /[ァ-ヶ]/.test("カナ") ) {
  console.log('full width');
}else{
  console.log('not full width');
}

    I'm not familiar with Japanese so I don't know what else I have to check also, I mean they have katakana, hiragana and so on that 's why I'm not sure my script is good enough, please let me know what do you think

    • javascript
    Share Improve this question edited May 20, 2016 at 15:52 dave101ua asked May 20, 2016 at 15:31 dave101uadave101ua 1911 gold badge2 silver badges15 bronze badges
    Add a ment  | 

    2 Answers 2

    Reset to default 6

    Japanese use a lot of the kind of character.
    e.g.

    • ひらがな(hiragana): あいうえお
    • カタカナ(katakana): アイウエオ
    • 半角カタカナ(half-width katakana): ｱｲｳｴｵ
    • 漢字(kanji): 安以宇衣於
    • 全角数字(full-width number): １２３４５
    • 全角アルファベット(full-width alphabet): ＡＢＣＤＥ
    • 記号(symbol): ○△□〜☆≠≧

    It can not be detected with a simple regular expression. Variations of the character width is also in other Asian languages. In Unicode, which is defined as the "east asian width".

    Unicodedata module of python is often used to determine the "east asian width". That something like does not exist in the standard function of JavaScript.

    But, there are some npm modules. If you use this East Asian Width module can be determined like this.

    var eaw = require('eastasianwidth');
function isHalfWidth(c){ return eaw.length(c) == 1; }

isHalfWidth("あ")
// -> false
isHalfWidth("ｱ")
// -> true
isHalfWidth("Ａ")
// -> false
isHalfWidth("A")
/// -> true

    mbStrWidth('過'); // return 2 ---> full width mbStrWidth('ｻ'); // return 1 ---> half width

    // read more http://php/manual/en/function.mb-strwidth.php
function mbStrWidth(input) {
        let len = 0;
        for (let i = 0; i < input.length; i++) {
            let code = input.charCodeAt(i);
            if ((code >= 0x0020 && code <= 0x1FFF) || (code >= 0xFF61 && code <= 0xFF9F)) {
                len += 1;
            } else if ((code >= 0x2000 && code <= 0xFF60) || (code >= 0xFFA0)) {
                len += 2;
            } else {
                len += 0;
            }
        }
        return len;
}

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