Javascript: Fragen zu replace()

Mordred · 1 Februar 2011

Hallo!
Ich habe eine Frage zur Funktion "replace":

Wie kann ich die Funktion so anwenden, dass sie Text nicht komplett ersetzt, sondern nur am Anfang und am Ende des Gesuchten weiteren Text einfügt?

Danke im Voraus : )

Cheffchen · 1 Februar 2011

Hallo,

ja.

Hier ein zwei interessante Links
RegExr
Der RegExp-Evaluator - RegExp-Tutorial - Assertions

Cheffchen

Arcsinh · 1 Februar 2011

Code:

text.replace(/(.+)/, "text1 $1 text2");

Mordred · 1 Februar 2011

Danke, es hat nach einigem herumprobieren geklappt : )
LG

Arcsinh · 1 Februar 2011

Gerne...
Obwohl ich mich frage, was du da probiert hast

Mordred · 1 Februar 2011

Ich habe eine (kostenlose) Webseite mit einem Tutorial für "Lua - The Programming Language".
Die Skriptboxen sollten ihren Inhalt automatisch einfärben, aber auf der (kostenlosen...) Seite gibt es kein PHP.
So sieht es bisher aus:

Code:

<script type="text/javascript" >
   pretags = document.getElementsByTagName("pre");
    for (var i in pretags) {
     if (typeof(pretags[i]) == "object") {
      if (pretags[i]["className"] == "lua") {
       var ersetz = new Array("Hal","lo");
        //LuaBlau
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(do)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(end)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(for)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/( in )/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(if)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(then)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(else)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(while)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(repeat)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(until )/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(function)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(return)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(brake)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(local )/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(true)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(false)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(nil)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/( and )/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/( or )/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(not)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xxxxxx)/g,"<lua_blue>$1</lua_blue>");
        //LuaTurkis
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(_G)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(_VERSION)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(assert)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(collectgarbage)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(setmetatable)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(getmetatable)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(error)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(gcinfo)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(ipairs)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(tonumber)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(tostring)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(type)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(unpack)/g,"<lua_turq>$1</lua_turq>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(xpcall)/g,"<lua_turq>$1</lua_turq>");
        //LuaLila
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.byte)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.char)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.dump)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.find)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.format)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.gfind)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.gmatch)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.gsub)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.len)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.lower)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.match)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.rep)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.reverse)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.sub)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(string.upper)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.concat)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.foreach)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.foreachi)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.getn)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.insert)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.remove)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.setn)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(table.sort)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.abs)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.acos)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.asin)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.ceil)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.cos)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.deg)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.exp)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.floor)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.frexp)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.ldexp)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.log)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.log10)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.max)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.min)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.mod)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.pi)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.rad)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.random)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.randomseed)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.sin)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.sqrt)/g,"<lua_lila>$1</lua_lila>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(math.tan)/g,"<lua_lila>$1</lua_lila>");
        //Extra
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/--(.+)/g,"<lua_comment>--$1</lua_comment>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(/(\d+)/g,"<lua_number>$1</lua_number>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace("(","<lua_blue>(</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace(")","<lua_blue>)</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace("{","<lua_blue>{</lua_blue>");
       pretags[i].innerHTML = pretags[i].innerHTML.replace("}","<lua_blue>}</lua_blue>");
      }
     }
    }
  </script>

Arcsinh · 1 Februar 2011

Puh, ganz schön viel Code, den kann man mit einer for-Schleife sicher verkürzen...

Mordred · 1 Februar 2011

Arcsinh schrieb:
Puh, ganz schön viel Code, den kann man mit einer for-Schleife sicher verkürzen...

Läuft das wirklich schneller, wenn ich die Ausdrücke in ein Array speichere?

Arcsinh · 1 Februar 2011

Hab ich nicht getestet, kann es dir also auch nicht sagen, aber der Code sieht dann übersichtlicher aus und erschlägt einen nicht, wenn man ihn nach einiger Zeit wieder editieren will.

Javascript: Fragen zu replace()

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