如何转换＆＃39; {＆＃34; key1＆＃34; =＆GT; ＆＃34; value1＆＃34;，＆＃34; key2＆＃34; =＆GT; ＆＃34;值2＆＃34;}＆＃39; to＆＃39; {key1：＆＃34; value1＆＃34;，key2：＆＃34; value2＆＃34;}＆＃39;

Question

我想转换自：

{"key1" => "value1","key2" => "value2"}

到

{key1: "value1", key2: "value2"}

Answer 1

目前，你必须这样做：

{"key1" => "value1", "key2" => "value2"}
.map{|k, v| [k.to_sym, v]}.to_h
# => {:key1=>"value1", :key2=>"value2"}

效率稍高：

{"key1" => "value1", "key2" => "value2"}
.each_with_object({}){|(k, v), h| h[k.to_sym] = v}
# => {:key1=>"value1", :key2=>"value2"}

在不久的将来，Hash#transform_keys可能会出现。