Kernel#gsub

gsub(pattern, replacement) → $_

gsub(pattern) {|...| block } → $_

static VALUE
rb_f_gsub(int argc, VALUE *argv, VALUE _)
{
    VALUE str = rb_funcall_passing_block(uscore_get(), rb_intern("gsub"), argc, argv);
    rb_lastline_set(str);
    return str;
}

Equivalent to $_.gsub..., except that $_ will be updated if substitution occurs. Available only when -p/-n command line option specified.

See also #global_variables #Hash #gets #Integer also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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