string(float chars, string s, ...) strpad = #225;
string(string info, string key, string value, ...) infoadd = #226;
string(string info, string key) infoget = #227;
+float(string s1, string s2) strcmp = #228;
float(string s1, string s2, float len) strncmp = #228;
float(string s1, string s2) strcasecmp = #229;
float(string s1, string s2, float len) strncasecmp = #230;