eval

I'm trying to call Tamarin's ESC Compiler from AS3 code. I've got the ESC Compiler byte code loaded in Flash Player, but when I call it, the ESC Compiler always returns the same do nothing byte code, no matter what source code I feed it. The human readable ESC code looks like this: function compileStringToBytes(input, context="(string)", start_line=1) { let [_,_,res] = compile( (function () input), (function (abc) abc.getBytes()), context, start_line ); return res; } I'm calling it using the following AS3 code: var compile:Function = getDefinitionByName("ESC::compileStringToBytes") as Function

In PHP you have the create_function() function which creates a unique named lambda function like this: $myFunction = create_function('$foo', 'return $foo;'); $myFunction('bar'); //Returns bar Is this actually any better (apart from being more easy) then just doing: do{ $myFunction = 'createdFunction_'.rand(); } while(function_exists($myFunction)); eval("function $myFunction(\$foo) { return \$foo; }"); $myFunction('bar'); //Returns bar Is create_function really better? (apart from the fact that it is more easy) On my understanding of the relevant docs,[1] they both do the same thing, create

JDK8中新添加了ScriptEngineManager类用于调用脚本文件 ScriptEngineManager类常用方法 getEngineByExtension(String extension) 查找并创建一个ScriptEngine一个给定扩展 getEngineByName(String shortName) 查找并为给定的名称创建一个 ScriptEngine 。 put(String key, Object value) 方法在全局范围中设置指定的键/值对。 get(String key) 获取全局范围中指定键的值。 ScriptEngine接口常用方法 eval(Reader reader) 与 eval(String) 相同，只是脚本的来源以 Reader形式提供 Object eval(String script) 执行指定的脚本。 get(String key) 检索在此引擎状态下设置的值。 put(String key, Object value) 在ScriptEngine的状态下设置一个键/值对，可以创建一个Java语言绑定，以便在执行脚本时使用，或者以某种其他方式使用，具体取决于该键是否被保留。 代码示例 public void hello() throws Exception{ ScriptEngineManager manager = new

I would like to be able to evaluate an boolean expression stored as a string, like the following: "hello" == "goodbye" && 100 < 101 I know that there are tons of questions like this on SO already, but I'm asking this one because I've tried the most common answer to this question, BeanShell , and it allows for the evaluation of statements like this one "hello" == 100 with no trouble at all. Does anyone know of a FOSS parser that throws errors for things like operand mismatch? Or is there a setting in BeanShell that will help me out? I've already tried Interpreter.setStrictJava(true). For

PING 查看服务是否运行 语法 Redis 客户端的基本语法为： $ redis-cli 实例 以下实例讲解了如何启动 redis 客户端： 启动 redis 客户端，打开终端并输入命令 redis-cli 。该命令会连接本地的 redis 服务。 $redis-cli redis 127.0.0.1:6379> redis 127.0.0.1:6379> PING PONG 在以上实例中我们连接到本地的 redis 服务并执行 PING 命令，该命令用于检测 redis 服务是否启动。 在远程服务上执行命令 如果需要在远程 redis 服务上执行命令，同样我们使用的也是 redis-cli 命令。 语法 $ redis-cli -h host -p port -a password 实例 以下实例演示了如何连接到主机为 127.0.0.1，端口为 6379 ，密码为 mypass 的 redis 服务上。 $redis-cli -h 127.0.0.1 -p 6379 -a "mypass" redis 127.0.0.1:6379> redis 127.0.0.1:6379> PING PONG 有时候会有中文乱码。要在 redis-cli 后面加上 --raw redis-cli --raw就可以避免中文乱码了。DEL key该命令用于在 key 存在时删除 key。

I'm curious if there is any good information on performing restricted evals. Looking at the docs, there is a use Safe that has a reval method, but I'm not sure how safe that is. What I want to do is to be able to pass various conditional statements as a string to a function w/o the source abusing the eval. For instance: sub foo { my $stmt = shift; my $a = 3; say eval($stmt)?"correct":"wrong") , "($stmt)"; } foo( q{1 == $a} ); foo( q{$a =~ /3/ ); foo( q{(sub {return 3})->() eq 3} ); Would use Safe be good for this? All I need to be able to do is comparisons, no disk access, or variable

I have explored various options using quosures, symbols, and evaluation, but I can't seem to get the right syntax. Here is an example dataframe. data.frame("A" = letters[1:4], "B" = letters[26:23], "C" = letters[c(1,3,5,7)], "D" = letters[c(2,4,6,8)], "pastecols" = c("B, C","B, D", "B, C, D", NA)) A B C D pastecols 1 a z a b B, C 2 b y c d B, D 3 c x e f B, C, D 4 d w g h <NA> Now suppose I want to paste values from different columns based on the lookup string in pastecols, and I always want to include column A. This is my desired result: A B C D pastecols result 1 a z a b B, C a z a 2 b y c d

Attempting to deserialize JSON data and update each object's prototype and inherit a common function. However, the following script throws error "people[0].getFullName is not a function". The prototype for deserialized objects appears to be undefined after assignment. <html> <head> <script> var json = '[ {"firstName": "John", "lastName": "Smith"}, {"firstName": "Nancy", "lastName": "Jones"} ]'; var people; eval('people = ' + json); function Person() { } Person.prototype.getFullName = function() { return this.firstName + ' ' + this.lastName; } //assign prototype for(var i=0; i < people.length;

Using square brackets for string evaluation, I am trying to make [inputString] return 320 . Any ideas how to do it? Public Sub TestMe() Dim inputString As String inputString = "20+300" Debug.Print Application.Evaluate(inputString) 'ok Debug.Print Evaluate([inputString]) 'ok Debug.Print [20+300] 'ok Debug.Print ["20"+"300"] 'ok Debug.Print ["20"+300] 'ok Debug.Print [inputString] 'returns "20+300" and not 320 End Sub jamheadart From the link in the comment : "Using square brackets (for example, "[A1:C5]") is identical to calling the Evaluate method with a string argument." I read that to mean: