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| 1 | // ************************************************************************************************************************************************* |
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| 2 | // Libreria de scripts de Javascript |
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| 3 | // Autor: José Manuel Alonso (E.T.S.I.I.) Universidad de Sevilla |
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| 4 | // Fecha Creación: 2009-2010 |
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| 5 | // Fecha Última modificación: Noviembre-2005 |
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| 6 | // Nombre del fichero: cadenas.js |
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| 7 | // Descripción : |
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| 8 | // Este fichero implementa funciones de uso común para cadenas |
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| 9 | // ************************************************************************************************************************************************* |
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| 10 | function TrimLeft( str ) { |
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| 11 | var resultStr = ""; |
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| 12 | var i = len = 0; |
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| 13 | if (str+"" == "undefined" || str == null) return null; |
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| 14 | str += ""; |
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| 15 | if (str.length == 0) |
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| 16 | resultStr = ""; |
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| 17 | else { |
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| 18 | len = str.length; |
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| 19 | while ((i <= len) && (str.charAt(i) == " ")) i++; |
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| 20 | resultStr = str.substring(i, len); |
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| 21 | } |
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| 22 | return resultStr; |
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| 23 | } |
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| 24 | //-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| 25 | function TrimRight( str ) { |
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| 26 | var resultStr = ""; |
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| 27 | var i = 0; |
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| 28 | if (str+"" == "undefined" || str == null) return null; |
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| 29 | str += ""; |
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| 30 | if (str.length == 0) |
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| 31 | resultStr = ""; |
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| 32 | else { |
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| 33 | i = str.length - 1; |
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| 34 | while ((i >= 0) && (str.charAt(i) == " ")) i--; |
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| 35 | resultStr = str.substring(0, i + 1); |
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| 36 | } |
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| 37 | return resultStr; |
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| 38 | } |
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| 39 | //-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| 40 | function Trim( str ) { |
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| 41 | var resultStr = ""; |
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| 42 | resultStr = TrimLeft(str); |
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| 43 | resultStr = TrimRight(resultStr); |
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| 44 | return resultStr; |
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| 45 | } |
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