End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

String#delete_suffix

str.delete_suffix(suffix) → new_str

static VALUE
rb_str_delete_suffix(VALUE str, VALUE suffix)
{
    long suffixlen;

    suffixlen = deleted_suffix_length(str, suffix);
    if (suffixlen <= 0) return str_duplicate(rb_cString, str);

    return rb_str_subseq(str, 0, RSTRING_LEN(str) - suffixlen);
}

Returns a copy of str with trailing suffix deleted.

Example

"hello".delete_suffix("llo") #=> "he"
"hello".delete_suffix("hel") #=> "hello"

Ruby version changes

3.0
- The following methods now return or yield String instances instead of subclass instances when called on subclass instances: [Bug #10845]

See also #delete_suffix! #delete_prefix! #delete_prefix #downcase also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0

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