eval

问题 I am building a container bound google apps script for a school. The school requires every written item to have the 'school heading'. The school uses blocks A-G as periods. My goal is that there will be a menu, 'School Heading', when opened it has the submenus 'A Block', 'B Block', 'C Block', and in each submenu there will be an option for each class, which will insert the heading for that class into the document's heading Here is my code: var BLOCKS = "abcdefg"; var CLASSES = ["English",

问题 I'm having an issue in which my parser for if-blocks (and Do-While blocks because the problem is the same) won't terminate upon the parsing of the string "fi". An If-Block takes the form of: if P -> p [] Q -> q fi If I use Text.Parsec 's string parser to parse "fi" like how I used it to parse "if" to even enter the loop, the program halts. When I print out what should be evaluated its not even there so the program doesn't even enter the If-Block when it is ended with "fi" . When I remove the

问题 I need to eval some code in Perl that might some times contain an exit() call in it. A very simplified example of this would be: use strict; use warnings; eval "some_function()"; die $@ if $@; print "Still alive!\n"; sub some_function { print "Hello from some_function\n"; exit; } I never get to "Still alive!" because of the exit() call. I tried setting some keys in %SIG (QUIT, STOP, TERM, BREAK, etc) but that didn't work. I also attempted to redefine CORE::exit with no success. How can I

问题 I need to eval some code in Perl that might some times contain an exit() call in it. A very simplified example of this would be: use strict; use warnings; eval "some_function()"; die $@ if $@; print "Still alive!\n"; sub some_function { print "Hello from some_function\n"; exit; } I never get to "Still alive!" because of the exit() call. I tried setting some keys in %SIG (QUIT, STOP, TERM, BREAK, etc) but that didn't work. I also attempted to redefine CORE::exit with no success. How can I

问题 var val = 3; var code = "var a = 5; if (a >= val) { console.log(a + ' >= ' + val); a; } else { console.log(a + ' < 3 ' + val); val; }"; console.log(eval(code)); This is the scenario where an alternative to eval() is required. The Server can send any kind of JS code which could be run on a particular block. 回答1: Do not use eval(code) or new Function(code) as both are basically the same thing and should be blocked by CSP. Just return your content from the server as content-type: text/javascript

问题 var val = 3; var code = "var a = 5; if (a >= val) { console.log(a + ' >= ' + val); a; } else { console.log(a + ' < 3 ' + val); val; }"; console.log(eval(code)); This is the scenario where an alternative to eval() is required. The Server can send any kind of JS code which could be run on a particular block. 回答1: Do not use eval(code) or new Function(code) as both are basically the same thing and should be blocked by CSP. Just return your content from the server as content-type: text/javascript

问题 I'm doing genetic programming framework and I need to be able to execute some string representing complete python programs. I'm using Python 2.7. I have a config class in which the primitive sets are defined. Lets say class Foo(): def a(self,x): return x def b(self,y): return y I'm extracting the functions with the python inspect module and I want to create some executable source code with imports and everything. I end up with a string that looks like this import sys def a(x,y): return x def

问题 I'm trying to generate UI dynamically in react native from a String fetched from an API. I don't quite get why eval() is not working in this example: <View style={{flex:1}}> {eval('React.createElement(Text, { style: styles.highlight }, `This is my text`)')} </View> Error: ReferenceError: can't find variable: React Even though I'm getting this error, if I run the same code directly without eval it works perfectly: <View style={{flex:1}}> {React.createElement(Text, { style: styles.highlight },

问题 I have table with variable names and observation for this variable. Some of these observations should be saved to variable as text. I can't find any other way to deal with except the following, which is not working: x <- data.frame( c("Name1","Name2","Name3"), c("Result1",2,"Result3") ) txt <- paste(x[,1], "<-", x[,2], sep="") eval(parse(text=txt)) Error in eval(parse(text = txt)) : object 'Result1' not found I need to get the result where Name1 = "Result1" 回答1: Ideally you should not be

问题 I'm trying to read from Bash variables for which I know name suffixes, but I want to iterate through the prefixes. I give an example below: var1_name="variable1" var1_size="2" var2_name="variable2" var2_size="3" vars=(var1 var2) for v in "${vars[@]}" do echo $v_name echo $v_size done and I'd want the output to look like follows: variable1 2 variable2 3 Is there any to do this with Bash? I have tried with eval and associative arrays, but I still can't find a way to examine an already defined