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instance method

Hash#except

hsh.except(*keys) → a_hash

static VALUE
rb_hash_except(int argc, VALUE *argv, VALUE hash)
{
    int i;
    VALUE key, result;

    result = hash_dup_with_compare_by_id(hash);

    for (i = 0; i < argc; i++) {
        key = argv[i];
        rb_hash_delete(result, key);
    }

    return result;
}

Returns a new Hash excluding entries for the given keys:

Example

h = { a: 100, b: 200, c: 300 }
h.except(:a)          #=> {:b=>200, :c=>300}

Any given keys that are not found are ignored.

Ruby version changes

3.0
- Hash#except has been added, which returns a hash excluding the given keys and their values. [Feature #15822]

See also #eql? #fetch #empty? #fetch_values also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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