En una segunda funci\u00f3n se hace con una expresi\u00f3n regular. Para ello se utiliza la funci\u00f3n exp=RegExp(origen,”g”)<\/strong>. Esto crea una expresi\u00f3n regular del tipo \/valor_de_origen\/g. A continuaci\u00f3n se puede hacer un String.replace(exp,”XXXXX”)<\/strong>;<\/p>\n\n\n\n En este c\u00f3digo se analiza (parsea) un texto buscando una cadena que se solicita por pantalla y se sustituye por “XXXXX” (este valor puede ser … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[193,204,260,261,285,289,318],"class_list":["post-147","post","type-post","status-publish","format-standard","hentry","category-javascript","tag-indexof","tag-javascript","tag-parsear","tag-parser","tag-regexp","tag-replace","tag-sustituir"],"_links":{"self":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/comments?post=147"}],"version-history":[{"count":1,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/147\/revisions"}],"predecessor-version":[{"id":977,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/posts\/147\/revisions\/977"}],"wp:attachment":[{"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/media?parent=147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/categories?post=147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/javigomez.org\/index.php\/wp-json\/wp\/v2\/tags?post=147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"http:\/\/javigomez.org\/wp-content\/uploads\/2022\/11\/image-29-2-13-1.png\")
<\/figure>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n\n<head>\n <meta charset=\"UTF-8\">\n <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>4.12<\/title>\n<\/head>\n\n<body>\n <h1>4.12 Parsea un texto<\/h1>\n <p>Introduce el texto que se va a cambiar por XXXXX: <\/p>\n <textarea id=\"texto\"><\/textarea>\n\n <p>\n Cadena a buscar: <input type=\"text\" placeholder=\"Texto a sustituir por XXXXX\" id=\"buscado\">\n\n <input type=\"button\" value=\"Sustituir sin RegExp\" onclick=\"buscar2()\">\n <input type=\"button\" value=\"Sustituir con RegExp\" onclick=\"buscar()\">\n <\/p>\n\n <p id=\"resultado\"><\/p>\n\n <script>\n \/\/ realiza la b\u00fasqueda sin utilizar expresiones regulares\n function buscar2() {\n var sCad = document.getElementById(\"texto\").value;\n var sBuscado = document.getElementById(\"buscado\").value;\n\n \/* while (sCad.indexOf(sBuscado) != -1) {\n var sCad = sCad.replace(sBuscado, \"XXXXX\");\n }\n*\/\n sCad=sCad.replaceAll(sBuscado,\"XXXXX\");\n\n document.getElementById(\"resultado\").innerHTML = sCad;\n }\n \/\/ realiza la b\u00fasqueda y sustituci\u00f3n con expresiones regulares\n function buscar() {\n var sCad = document.getElementById(\"texto\").value;\n var sBuscado = document.getElementById(\"buscado\").value;\n\n var exp = new RegExp(sBuscado, \"g\"); \/\/crea la expresi\u00f3n regular - \/cadena\/g - \n var sFinal = sCad.replace(exp, \"XXXXX\");\n\n document.getElementById(\"resultado\").innerHTML = sFinal;\n }\n <\/script>\n<\/body>\n\n<\/html><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"