The most common is using its read-eval-print-loop (REPL).
其中最常用的一种方法是使用它的REPL（read-eval-print-loop）。
Note that the eval-concat in Listing 7 only partially solves our problem.
请注意，清单7中的eval - concat仅仅是解决了我们的部分问题。
This is obvious in the Visitor implementation where you see all of the recursive calls to the eval-concat function.
在访问者实现中可以清楚地看到这一点，您可以看到对eval - concat函数的所有递归调用。
Many script engines maintain state of global variables and functions between calls to eval().
许多脚本引擎在eval()调用之间维持全局变量和函数的状态。
Added a simplistic eval support, you can do on your config.
添加了一个很简单的计算(Eval)支持，你能进行配置。
Still, in some situations, it might be prudent to verify that data received from a server matches expectations, perhaps with a regular expression, before passing it to the eval statement.
但有时候，把从服务器收到的数据传递给eval语句之前，检查其是否符合预期目标可能更谨慎一些，比如使用正则表达式。
You can use the JSON.parse function that the JSON libraries provide (see Resources) in place of the standard eval function.
您可以使用json库提供的JSON .parse函数(参见参考资料)来取代标准的eval函数。
This can be done by passing the value to the String function as in this example: eval (String (formula));.
这可以像本例中一样通过将值传递给String函数来做到：eval (String (formula))；。
You can eval the response directly, but it is safer to use a parser.
您可以直接地eval这个响应，但使用解析器将会更安全。
As a consequence ClojureScript lacks eval or other types of runtime code loading.
因此，ClojureScript缺少eval和其他类型的运行时代码加载能力。
I also predict at least one major security breach as a direct result of passing JSON data to the eval function.
我还预料将出现至少一次由于向eval函数传递JSON数据而造成的重大安全问题。
If your metaprogramming requires eval, it's subject to the same requirements.
如果你的元编程需要eval，那它也必须遵循相同的要求。
From that point forward I used eval when necessary; however, I was careful to keep an eye toward using it as efficiently as possible.
从那时开始，我只在必要的时候才使用eval，而且我非常注意如何以更有效率的方式来使用eval。
This pair of methods demonstrates that script engines can maintain a state of application components and make that state available during subsequent calls to the engine's eval method.
这两个方法演示了脚本引擎可以维持应用程序组件的状态，并且能够在后续的eval方法调用过程中使用其状态。
Line 5 USES the eval statement, which is one of the most powerful features of dynamic languages.
第5行使用eval语句，它是动态语言的最强大的特性之一。
Instructions embedded in a JSON data block and processed by the eval function are executed immediately.
JSON数据块中嵌入的、通过eval函数处理的指令将立即被执行。
Note: Ideally you shouldn't use eval(), since it can be used to execute arbitrary text.
注意：理想情况下不应该使用eval()，因为它可用于执行任意格式的文本。
I remember feeling like the call to eval was ugly, but at the time I couldn't think of another way to complete the task. I posted the code on my blog for all to criticize, and they quickly did.
记得当时我觉得这样调用eval是非常丑陋的做法，但那会儿我想不出更好的方式来实现这样的效果；因此我把代码贴到了博客中，等待别人的指摘；他们很快就做出了回应，并给出下面的做法。
At the beginning we started with a simple example, but lets revist a simple case where we use eval with the binding of a block.
先让我们从一个简单的例子开始，不过让我们先回顾一下如何根据block的binding使用eval。
As you write more and more test cases, you will find that eval blocks are very useful for many tests.
当您编写越来越多的测试用例时，将发现对于许多测试，eval块很有用。
That is the reason we use the eval function.
这就是我们使用eval函数的原因。
One thing to watch out for in the interactive environment is that you need to eval each statement suite as soon as you write it.
在交互式环境中有一件事情值得注意，当写完每个语句组，需要eval它。
Wilson hammered out a ton of the machinery necessary to support compiling eval.
Wilson推敲出一堆支持编译eval时需要的方法。
The eval statement in Listing 3 will execute whatever code the server returns, so there is a security risk here.
清单3中的eval语句将执行服务器返回的所有代码，因此这里存在安全风险。
Method and block bodies can be compiled "completely", so it's possible to use define_method and friends even when eval isn't available.
方法和块能被“完全”编译，因此可以在eval不可用时使用define_method等一系列方法。
Listing 2: Using eval to trap errors.
清单2：使用eval来捕获错误。
Without the conversion, the eval function basically does nothing.
无需转换的话，eval函数基本上不做任何事情。
To exploit this, attackers send malformed JSON objects to these libraries so the eval function executes their malicious code.
要利用这点，攻击者可以向这些库发送畸形的JSON对象，这样eval函数就会执行这些恶意代码。
On the other hand, a Live Eval session affords a more accurate glimpse of what it's like to use a full-blown Linux distribution in a standard working environment.
另一方面，LiveEval会话使我们可以更精确地看到在标准的工作环境中使用一个功能齐全的Linux分发版的情况。
The LLVM IR interpreter was investigated in order to interpret faster #eval expressions.
为了更快解释#eval表达式，研究了LLVMIR解释器。
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