Mercurial Hosting > luan
annotate src/luan/impl/LuanImpl.java @ 1335:e0cf0d108a77
major cleanup
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 14 Feb 2019 03:10:45 -0700 |
parents | c88b486a9511 |
children | 465b4a0dae4a |
rev | line source |
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1 package luan.impl; |
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2 |
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3 import java.util.Arrays; |
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4 import java.util.List; |
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5 import java.util.ArrayList; |
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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; |
660 | 10 import luan.modules.JavaLuan; |
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11 |
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12 |
654 | 13 public final class LuanImpl { |
14 private LuanImpl() {} // never | |
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15 |
1267 | 16 public static int len(Object o) throws LuanException { |
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17 if( o instanceof String ) { |
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18 String s = (String)o; |
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19 return s.length(); |
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20 } |
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21 if( o instanceof byte[] ) { |
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22 byte[] a = (byte[])o; |
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23 return a.length; |
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24 } |
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25 if( o instanceof LuanTable ) { |
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26 LuanTable t = (LuanTable)o; |
1267 | 27 return t.length(); |
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28 } |
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29 throw new LuanException( "attempt to get length of a " + Luan.type(o) + " value" ); |
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30 } |
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31 |
1335 | 32 public static Object unm(Object o) throws LuanException { |
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33 if( o instanceof Number ) |
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34 return -((Number)o).doubleValue(); |
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35 if( o instanceof LuanTable ) { |
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36 LuanFunction fn = Luan.getHandlerFunction("__unm",(LuanTable)o); |
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37 if( fn != null ) { |
1335 | 38 return Luan.first(fn.call(o)); |
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39 } |
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40 } |
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41 throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value"); |
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42 } |
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43 |
1335 | 44 private static Object arithmetic(String op,Object o1,Object o2) throws LuanException { |
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45 LuanFunction fn = Luan.getBinHandler(op,o1,o2); |
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46 if( fn != null ) |
1335 | 47 return Luan.first(fn.call(o1,o2)); |
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48 String type = !(o1 instanceof Number) ? Luan.type(o1) : Luan.type(o2); |
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49 throw new LuanException("attempt to perform arithmetic on a "+type+" value"); |
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50 } |
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51 |
1335 | 52 public static Object pow(Object o1,Object o2) throws LuanException { |
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53 if( o1 instanceof Number && o2 instanceof Number ) |
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54 return Math.pow( ((Number)o1).doubleValue(), ((Number)o2).doubleValue() ); |
1335 | 55 return arithmetic("__pow",o1,o2); |
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56 } |
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57 |
1335 | 58 public static Object mul(Object o1,Object o2) throws LuanException { |
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59 if( o1 instanceof Number && o2 instanceof Number ) |
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60 return ((Number)o1).doubleValue() * ((Number)o2).doubleValue(); |
1335 | 61 return arithmetic("__mul",o1,o2); |
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62 } |
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63 |
1335 | 64 public static Object div(Object o1,Object o2) throws LuanException { |
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65 if( o1 instanceof Number && o2 instanceof Number ) |
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66 return ((Number)o1).doubleValue() / ((Number)o2).doubleValue(); |
1335 | 67 return arithmetic("__div",o1,o2); |
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68 } |
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69 |
1335 | 70 public static Object mod(Object o1,Object o2) throws LuanException { |
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71 if( o1 instanceof Number && o2 instanceof Number ) { |
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72 double d1 = ((Number)o1).doubleValue(); |
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73 double d2 = ((Number)o2).doubleValue(); |
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74 return d1 - Math.floor(d1/d2)*d2; |
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75 } |
1335 | 76 return arithmetic("__mod",o1,o2); |
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77 } |
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78 |
1335 | 79 public static Object add(Object o1,Object o2) throws LuanException { |
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80 if( o1 instanceof Number && o2 instanceof Number ) |
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81 return ((Number)o1).doubleValue() + ((Number)o2).doubleValue(); |
1335 | 82 return arithmetic("__add",o1,o2); |
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83 } |
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84 |
1335 | 85 public static Object sub(Object o1,Object o2) throws LuanException { |
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86 if( o1 instanceof Number && o2 instanceof Number ) |
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87 return ((Number)o1).doubleValue() - ((Number)o2).doubleValue(); |
1335 | 88 return arithmetic("__sub",o1,o2); |
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89 } |
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90 |
1335 | 91 public static Object concat(Object o1,Object o2) throws LuanException { |
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92 LuanFunction fn = Luan.getBinHandler("__concat",o1,o2); |
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93 if( fn != null ) |
1335 | 94 return Luan.first(fn.call(o1,o2)); |
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95 String s1 = Luan.luanToString(o1); |
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96 String s2 = Luan.luanToString(o2); |
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97 return s1 + s2; |
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98 } |
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99 |
1335 | 100 public static boolean eq(Object o1,Object o2) throws LuanException { |
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101 if( o1 == o2 || o1 != null && o1.equals(o2) ) |
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102 return true; |
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103 if( o1 instanceof Number && o2 instanceof Number ) { |
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104 Number n1 = (Number)o1; |
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105 Number n2 = (Number)o2; |
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106 return n1.doubleValue() == n2.doubleValue(); |
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107 } |
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108 if( o1 instanceof byte[] && o2 instanceof byte[] ) { |
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109 byte[] b1 = (byte[])o1; |
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110 byte[] b2 = (byte[])o2; |
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111 return Arrays.equals(b1,b2); |
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112 } |
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113 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) ) |
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114 return false; |
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115 LuanTable t1 = (LuanTable)o1; |
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116 LuanTable t2 = (LuanTable)o2; |
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117 LuanTable mt1 = t1.getMetatable(); |
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118 LuanTable mt2 = t2.getMetatable(); |
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119 if( mt1==null || mt2==null ) |
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120 return false; |
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121 Object f = mt1.rawGet("__eq"); |
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122 if( f == null || !f.equals(mt2.rawGet("__eq")) ) |
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123 return false; |
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124 LuanFunction fn = Luan.checkFunction(f); |
1335 | 125 return Luan.checkBoolean( Luan.first(fn.call(o1,o2)) ); |
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126 } |
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127 |
1335 | 128 public static boolean le(Object o1,Object o2) throws LuanException { |
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129 if( o1 instanceof Number && o2 instanceof Number ) { |
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130 Number n1 = (Number)o1; |
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131 Number n2 = (Number)o2; |
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132 return n1.doubleValue() <= n2.doubleValue(); |
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133 } |
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134 if( o1 instanceof String && o2 instanceof String ) { |
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135 String s1 = (String)o1; |
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136 String s2 = (String)o2; |
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137 return s1.compareTo(s2) <= 0; |
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138 } |
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139 LuanFunction fn = Luan.getBinHandler("__le",o1,o2); |
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140 if( fn != null ) |
1335 | 141 return Luan.checkBoolean( Luan.first(fn.call(o1,o2)) ); |
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142 fn = Luan.getBinHandler("__lt",o1,o2); |
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143 if( fn != null ) |
1335 | 144 return !Luan.checkBoolean( Luan.first(fn.call(o2,o1)) ); |
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145 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) ); |
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146 } |
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147 |
1335 | 148 public static boolean lt(Object o1,Object o2) throws LuanException { |
149 return Luan.isLessThan(o1,o2); | |
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150 } |
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151 |
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152 public static boolean cnd(Object o) throws LuanException { |
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153 return !(o == null || Boolean.FALSE.equals(o)); |
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154 } |
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155 |
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156 public static void nop(Object o) {} |
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157 |
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158 public static void put(Luan luan,Object t,Object key,Object value) throws LuanException { |
660 | 159 if( t instanceof LuanTable ) { |
160 LuanTable tbl = (LuanTable)t; | |
1267 | 161 tbl.put(key,value); |
660 | 162 return; |
163 } | |
1330 | 164 if( t != null && luan.peek().javaOk ) |
660 | 165 JavaLuan.__new_index(luan,t,key,value); |
166 else | |
167 throw new LuanException( "attempt to index a " + Luan.type(t) + " value" ); | |
168 } | |
169 | |
662 | 170 public static Object pick(Object o,int i) { |
171 if( i < 1 ) | |
172 throw new RuntimeException(); | |
173 if( !(o instanceof Object[]) ) | |
174 return null; | |
175 Object[] a = (Object[])o; | |
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176 return pick(a,i); |
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177 } |
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178 |
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179 public static Object pick(Object[] a,int i) { |
662 | 180 return i<a.length ? a[i] : null; |
181 } | |
182 | |
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183 public static void noMore(final Object[] a,final int n) throws LuanException { |
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184 if( a.length > n ) { |
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185 for( int i=n; i<a.length; i++ ) { |
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186 if( a[i] != null ) |
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187 throw new LuanException("too many arguments"); |
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188 } |
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189 } |
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190 } |
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191 |
674 | 192 public static Object[] varArgs(Object[] a,int i) { |
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193 if( i >= a.length ) |
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194 return LuanFunction.NOTHING; |
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195 Object[] rtn = new Object[a.length - i]; |
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196 System.arraycopy(a,i,rtn,0,rtn.length); |
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197 return rtn; |
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198 } |
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199 |
654 | 200 public static Object[] concatArgs(Object o1,Object o2) { |
201 if( o1 instanceof Object[] ) { | |
202 Object[] a1 = (Object[])o1; | |
203 if( o2 instanceof Object[] ) { | |
204 Object[] a2 = (Object[])o2; | |
205 Object[] rtn = new Object[a1.length+a2.length]; | |
206 System.arraycopy(a1,0,rtn,0,a1.length); | |
207 System.arraycopy(a2,0,rtn,a1.length,a2.length); | |
208 return rtn; | |
209 } else { | |
210 Object[] rtn = new Object[a1.length+1]; | |
211 System.arraycopy(a1,0,rtn,0,a1.length); | |
212 rtn[a1.length] = o2; | |
213 return rtn; | |
214 } | |
215 } else { | |
216 if( o2 instanceof Object[] ) { | |
217 Object[] a2 = (Object[])o2; | |
218 Object[] rtn = new Object[1+a2.length]; | |
219 rtn[0] = o1; | |
220 System.arraycopy(a2,0,rtn,1,a2.length); | |
221 return rtn; | |
222 } else { | |
223 Object[] rtn = new Object[2]; | |
224 rtn[0] = o1; | |
225 rtn[2] = o2; | |
226 return rtn; | |
227 } | |
228 } | |
229 } | |
230 | |
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231 public static LuanTable table(Luan luan,Object[] a) throws LuanException { |
1267 | 232 LuanTable table = new LuanTable(luan); |
655 | 233 int i = 0; |
674 | 234 for( Object fld : a ) { |
655 | 235 if( fld instanceof TableField ) { |
236 TableField tblFld = (TableField)fld; | |
237 Object key = tblFld.key; | |
238 Object value = tblFld.value; | |
239 if( key != null && value != null ) | |
240 table.rawPut(key,value); | |
241 } else { | |
242 i++; | |
243 if( fld != null ) | |
244 table.rawPut(i,fld); | |
245 } | |
246 } | |
247 return table; | |
248 } | |
249 | |
674 | 250 public static Object first(Object[] a) { |
251 return a.length==0 ? null : a[0]; | |
252 } | |
253 | |
684 | 254 public static String strconcat(String... a) { |
255 StringBuilder sb = new StringBuilder(); | |
256 for( String s : a ) { | |
257 sb.append(s); | |
258 } | |
259 return sb.toString(); | |
260 } | |
261 | |
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262 } |