Javascript Review: RegExp

[Javascript] var patt1 = new RegExp ("e"); document. write (patt1.test ("The best things in life are free"); [javascript] var patt1 = new RegExp ("e "); document.write(patt1.exe c ("The best things in life are free"); [javascript] var patt1 = new RegExp ("e", "g "); do {result=patt1.exe c ("The best things in life are free"); document. write (result);} while (result! = Null) [javascript] var patt1 = new RegExp ("e"); document. write (patt1.test ("The best things in life are free"); patt1.compile ("d"); document. write (patt1.test ("The best things in life are free"); [javascript] var str = "Visit W3School"; var patt1 =/w3school/I; var patt2 = new RegExp ("w3school", "I") document. write (str. match (patt1); [javascript] var str = "Is this all there is? "; Var patt1 =/is/gi; document. write (str. match (patt1); [javascript] var str =" Is this all there is? "; Var patt1 =/[a-h]/g; var patt2 = new RegExp (" [a-h] "," g ") document. write (str. match (patt1); [javascript] var str = "Is this all there is? "; Var patt1 =/[^ a-h]/g; document. write (str. match (patt1); [javascript] var str =" Give 100%! "; Var patt1 =/\ w/g; document. write (str. match (patt1); [javascript] var str =" Give 100%! "; Var patt1 =/\ d/g; document. write (str. match (patt1); [javascript] var str = "Visit W3School. \ n Learn JavaScript. "; var patt1 =/\ n/g; document. write (str. search (patt1); [javascript] var str = "1,100 or 1000? "; Var patt1 =/10? /G; document. write (str. match (patt1); [javascript] var str = "100,100 0 or 10000? "; Var patt1 =/\ d {4}/g; document. write (str. match (patt1); [javascript] var str = "Is this all there is"; var patt1 =/is (? = All)/; document. write (str. match (patt1 ));