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; } ?>Filter an array of objects and return a filtered array using pure Javascript? - Stack Overflow

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    I'm working on a coding problem for university and can't figure this out.

    How can I get a new array from the above array with only applicants that have JavaScript listed as a skill using builtin methods only?

    The array looks like this:

    const NewApplicants = [
    { name: "Jimmy", skills: ["Docker", "JavaScript", "Ruby"] },
    { name: "Dave", skills: ["AWS", "Python"] },
    { name: "Frankie", skills: ["Azure", "JavaScript"] },
    { name: "Liam", skills: ["Java", "JavaScript"] },
    { name: "Fred", skills: ["JavaScript", "AWS"] },
    { name: "Sara", skills: ["PHP", "AWS"] },
    { name: "Matt", skills: [".Net", "PHP", "Docker"] },
];

    ... and the new array should look like this:

    const NewJavaScriptApplicants = [
    { name: "Jimmy", skills: ["Docker", "JavaScript", "Ruby"] },
    { name: "Frankie", skills: ["Azure", "JavaScript"] },
    { name: "Liam", skills: ["Java", "JavaScript"] },
    { name: "Fred", skills: ["JavaScript", "AWS"] },
];

    I'm working on a coding problem for university and can't figure this out.

    How can I get a new array from the above array with only applicants that have JavaScript listed as a skill using builtin methods only?

    The array looks like this:

    const NewApplicants = [
    { name: "Jimmy", skills: ["Docker", "JavaScript", "Ruby"] },
    { name: "Dave", skills: ["AWS", "Python"] },
    { name: "Frankie", skills: ["Azure", "JavaScript"] },
    { name: "Liam", skills: ["Java", "JavaScript"] },
    { name: "Fred", skills: ["JavaScript", "AWS"] },
    { name: "Sara", skills: ["PHP", "AWS"] },
    { name: "Matt", skills: [".Net", "PHP", "Docker"] },
];

    ... and the new array should look like this:

    const NewJavaScriptApplicants = [
    { name: "Jimmy", skills: ["Docker", "JavaScript", "Ruby"] },
    { name: "Frankie", skills: ["Azure", "JavaScript"] },
    { name: "Liam", skills: ["Java", "JavaScript"] },
    { name: "Fred", skills: ["JavaScript", "AWS"] },
];
    • javascript
    • arrays
    • filtering
    Share Improve this question edited Aug 15, 2018 at 19:29 user4639281 asked Aug 15, 2018 at 18:01 Jake WilcoxJake Wilcox 1761 gold badge2 silver badges11 bronze badges 0
    Add a ment  | 

    2 Answers 2

    Reset to default 10

    Use Array#filter and Array#includes like so:

    const NewApplicants = [
    { name: "Jimmy", skills: ["Docker", "JavaScript", "Ruby"] },
    { name: "Dave", skills: ["AWS", "Python"] },
    { name: "Frankie", skills: ["Azure", "JavaScript"] },
    { name: "Liam", skills: ["Java", "JavaScript"] },
    { name: "Fred", skills: ["JavaScript", "AWS"] },
    { name: "Sara", skills: ["PHP", "AWS"] },
    { name: "Matt", skills: [".Net", "PHP", "Docker"] },
];

const JavaScriptApplicants = NewApplicants.filter(e => e.skills.includes("JavaScript"));

console.log(JavaScriptApplicants)

    The filter() method creates a new array with all elements that pass the test implemented by the provided function.
    - https://developer.mozilla/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

    The includes() method determines whether an array includes a certain element, returning true or false as appropriate.
    - https://developer.mozilla/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes

    You can use the filter javascript method to loop through the objects and apply this condition:

    var filteredData = NewApplicants.filter(function(applicant) {
    return applicant.skills.includes('JavaScript');
});

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