Mercurial Hosting > luan
annotate src/luan/modules/StringLuan.java @ 1384:f5368cd8c056
remove template expressions and String.concat
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 15 Aug 2019 14:33:35 -0600 |
parents | e0cf0d108a77 |
children | 01e38174d580 |
rev | line source |
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1 package luan.modules; |
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757 | 3 import java.util.Arrays; |
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4 import java.util.regex.Pattern; |
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5 import java.util.regex.Matcher; |
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6 import luan.Luan; |
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7 import luan.LuanTable; |
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8 import luan.LuanFunction; |
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9 import luan.LuanException; |
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10 |
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11 |
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12 public final class StringLuan { |
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13 |
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14 static int start(String s,int i) { |
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15 int len = s.length(); |
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16 return i==0 ? 0 : i > 0 ? Math.min(i-1,len) : Math.max(len+i,0); |
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17 } |
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18 |
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19 static int start(String s,Integer i,int dflt) { |
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20 return i==null ? dflt : start(s,i); |
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21 } |
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22 |
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23 static int end(String s,int i) { |
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24 int len = s.length(); |
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25 return i==0 ? 0 : i > 0 ? Math.min(i,len) : Math.max(len+i+1,0); |
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26 } |
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27 |
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28 static int end(String s,Integer i,int dflt) { |
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29 return i==null ? dflt : end(s,i); |
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30 } |
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31 |
1335 | 32 public static Integer[] unicode(String s,Integer i,Integer j) throws LuanException { |
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33 Utils.checkNotNull(s); |
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34 int start = start(s,i,1); |
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35 int end = end(s,j,start+1); |
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36 Integer[] chars = new Integer[end-start]; |
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37 for( int k=0; k<chars.length; k++ ) { |
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38 chars[k] = (int)s.charAt(start+k); |
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39 } |
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40 return chars; |
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41 } |
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42 |
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43 public static String char_(int... chars) { |
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44 char[] a = new char[chars.length]; |
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45 for( int i=0; i<chars.length; i++ ) { |
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46 a[i] = (char)chars[i]; |
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47 } |
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48 return new String(a); |
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49 } |
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50 |
1335 | 51 public static byte[] to_binary(String s) { |
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52 return s.getBytes(); |
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53 } |
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54 |
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55 public static String lower(String s) throws LuanException { |
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56 Utils.checkNotNull(s); |
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57 return s.toLowerCase(); |
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58 } |
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59 |
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60 public static String upper(String s) throws LuanException { |
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61 Utils.checkNotNull(s); |
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62 return s.toUpperCase(); |
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63 } |
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64 |
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65 public static String trim(String s) throws LuanException { |
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66 Utils.checkNotNull(s); |
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67 return s.trim(); |
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68 } |
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69 |
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70 public static String reverse(String s) throws LuanException { |
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71 Utils.checkNotNull(s); |
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72 return new StringBuilder(s).reverse().toString(); |
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73 } |
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74 |
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75 public static String rep(String s,int n,String sep) { |
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76 if( n < 1 ) |
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77 return ""; |
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78 StringBuilder buf = new StringBuilder(s); |
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79 while( --n > 0 ) { |
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80 if( sep != null ) |
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81 buf.append(sep); |
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82 buf.append(s); |
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83 } |
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84 return buf.toString(); |
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85 } |
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86 |
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87 public static String sub(String s,int i,Integer j) throws LuanException { |
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88 Utils.checkNotNull(s); |
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89 int start = start(s,i); |
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90 int end = end(s,j,s.length()); |
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91 return s.substring(start,end); |
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92 } |
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93 |
1335 | 94 public static Object[] find(String s,String pattern,Integer init,Boolean plain) { |
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95 int start = start(s,init,0); |
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96 if( Boolean.TRUE.equals(plain) ) { |
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97 int i = s.indexOf(pattern,start); |
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98 return i == -1 ? null : new Integer[]{i+1,i+pattern.length()}; |
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99 } |
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100 Matcher m = Pattern.compile(pattern).matcher(s); |
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101 if( !m.find(start) ) |
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102 return null; |
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103 int n = m.groupCount(); |
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104 Object[] rtn = new Object[2+n]; |
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105 rtn[0] = m.start() + 1; |
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106 rtn[1] = m.end(); |
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107 for( int i=0; i<n; i++ ) { |
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108 rtn[2+i] = m.group(i+1); |
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109 } |
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110 return rtn; |
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111 } |
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112 |
1335 | 113 public static String[] match(String s,String pattern,Integer init) { |
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114 int start = start(s,init,0); |
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115 Matcher m = Pattern.compile(pattern).matcher(s); |
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116 if( !m.find(start) ) |
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117 return null; |
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118 int n = m.groupCount(); |
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119 if( n == 0 ) |
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120 return new String[]{m.group()}; |
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121 String[] rtn = new String[n]; |
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122 for( int i=0; i<n; i++ ) { |
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123 rtn[i] = m.group(i+1); |
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124 } |
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125 return rtn; |
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126 } |
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127 |
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128 public static LuanFunction gmatch(String s,String pattern) throws LuanException { |
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129 Utils.checkNotNull(s); |
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130 final Matcher m = Pattern.compile(pattern).matcher(s); |
1335 | 131 return new LuanFunction(false) { |
132 @Override public Object call(Object[] args) { | |
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133 if( !m.find() ) |
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134 return null; |
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135 final int n = m.groupCount(); |
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136 if( n == 0 ) |
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137 return m.group(); |
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138 String[] rtn = new String[n]; |
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139 for( int i=0; i<n; i++ ) { |
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140 rtn[i] = m.group(i+1); |
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141 } |
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142 return rtn; |
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143 } |
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144 }; |
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145 } |
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146 |
1335 | 147 public static Object[] gsub(String s,String pattern,Object repl,Integer n) throws LuanException { |
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148 Utils.checkNotNull(s); |
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149 int max = n==null ? Integer.MAX_VALUE : n; |
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150 final Matcher m = Pattern.compile(pattern).matcher(s); |
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151 if( repl instanceof String ) { |
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152 String replacement = (String)repl; |
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153 int i = 0; |
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154 StringBuffer sb = new StringBuffer(); |
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155 while( i<max && m.find() ) { |
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156 m.appendReplacement(sb,replacement); |
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157 i++; |
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158 } |
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159 m.appendTail(sb); |
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160 return new Object[]{ sb.toString(), i }; |
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161 } |
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162 if( repl instanceof LuanTable ) { |
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163 LuanTable t = (LuanTable)repl; |
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164 int i = 0; |
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165 StringBuffer sb = new StringBuffer(); |
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166 while( i<max && m.find() ) { |
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167 String match = m.groupCount()==0 ? m.group() : m.group(1); |
1267 | 168 Object val = t.get(match); |
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169 if( val != null ) { |
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170 String replacement = Luan.luanToString(val); |
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171 m.appendReplacement(sb,replacement); |
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172 } |
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173 i++; |
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174 } |
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175 m.appendTail(sb); |
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176 return new Object[]{ sb.toString(), i }; |
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177 } |
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178 if( repl instanceof LuanFunction ) { |
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179 LuanFunction fn = (LuanFunction)repl; |
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180 int i = 0; |
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181 StringBuffer sb = new StringBuffer(); |
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182 while( i<max && m.find() ) { |
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183 Object[] args; |
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184 final int count = m.groupCount(); |
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185 if( count == 0 ) { |
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186 args = new String[]{m.group()}; |
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187 } else { |
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188 args = new String[count]; |
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189 for( int j=0; j<count; j++ ) { |
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190 args[j] = m.group(j+1); |
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191 } |
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192 } |
1335 | 193 Object val = Luan.first( fn.call(args) ); |
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194 if( val != null ) { |
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195 String replacement = Luan.luanToString(val); |
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196 m.appendReplacement(sb,replacement); |
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197 } |
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198 i++; |
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199 } |
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200 m.appendTail(sb); |
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201 return new Object[]{ sb.toString(), i }; |
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202 } |
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203 throw new LuanException( "bad argument #3 to 'gsub' (string/function/table expected)" ); |
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204 } |
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205 |
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206 // note - String.format() is too stupid to convert between ints and floats. |
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207 public static String format(String format,Object... args) { |
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208 return String.format(format,args); |
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209 } |
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210 |
420 | 211 public static String encode(String s) { |
212 return Luan.stringEncode(s); | |
213 } | |
214 | |
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215 public static Number to_number(String s,Integer base) throws LuanException { |
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216 Utils.checkNotNull(s); |
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217 try { |
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218 if( base == null ) { |
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219 return Double.valueOf(s); |
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220 } else { |
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221 return Long.valueOf(s,base); |
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222 } |
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223 } catch(NumberFormatException e) {} |
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224 return null; |
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225 } |
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226 |
702 | 227 public static boolean matches(String s,String pattern) throws LuanException { |
228 Utils.checkNotNull(s); | |
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229 return Pattern.compile(pattern).matcher(s).find(); |
456 | 230 } |
231 | |
1335 | 232 public static String[] split(String s,String pattern,Integer limit) throws LuanException { |
757 | 233 Utils.checkNotNull(s); |
1195 | 234 int n = limit==null ? -1 : limit; |
235 return s.split(pattern,n); | |
757 | 236 } |
237 | |
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238 } |