Package org.nutz.el

Examples of org.nutz.el.El.eval()

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        try {
          El el2pre = new El(elstr);
          context.set("num", 0);
          context.set("z", z);
          for (int i = 0; i < max; i++)
            context.set("num", el2pre.eval(context.set("i", i)));
          System.out.println("Num: " + context.getInt("num"));
        }
        catch (Exception e) {
          throw Lang.wrapThrow(e);
        }
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        try {
          El el2pre = new El(elstr);
          context.set("num", 0);
          context.set("z", z);
          for (int i = 0; i < max; i++)
            context.set("num", el2pre.eval(context.set("i", i)));
          System.out.println("Num: " + context.getInt("num"));
        }
        catch (Exception e) {
          throw Lang.wrapThrow(e);
        }
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        map.put("a", a);
        El exp = new El("util.test(map['a'])");
        Context context = Lang.context();
        context.set("util",StringUtil.class.newInstance());
        context.set("map", map);
        assertEquals("ab", exp.eval(context));
    }
   
    @Test
    public void test2(){
        String[] a = new String[]{"a","b"};
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        map.put("b", b);
        El exp = new El("util.test(map['a'][0],map['b'][0])");  // 预编译结果为一个 El 对象
        Context context = Lang.context();
        context.set("util",new StringUtil());
        context.set("map", map);
        System.out.println(exp.eval(context));
    }
   
    /**
     * 原因级结论
     * 由于","操作符的权重设置不正确, 导致错误的逆波兰解析.
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                try {
                    El el2pre = new El(elstr);
                    context.set("num", 0);
                    context.set("z", z);
                    for (int i = 0; i < max; i++)
                        context.set("num", el2pre.eval(context.set("i", i)));
                    System.out.println("Num: " + context.getInt("num"));
                }
                catch (Exception e) {
                    throw Lang.wrapThrow(e);
                }
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                try {
                    El el2pre = new El(elstr);
                    context.set("num", 0);
                    context.set("z", z);
                    for (int i = 0; i < max; i++)
                        context.set("num", el2pre.eval(context.set("i", i)));
                    System.out.println("Num: " + context.getInt("num"));
                }
                catch (Exception e) {
                    throw Lang.wrapThrow(e);
                }
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