eval() is a function available in a number of programming languages (including PHP, Python Javascript, among others), which allows the programmer to execute arbitrary code written in the same language, from a string variable within the main program.
-1
votes
3answers
30 views
PHP Error Undefined Functions [closed]
I am getting Error Undefined Function.
Here is the code:
$myvar = "@file_get_contents";
eval($myvar("http://someurlupdatehere.com"));
The error I get is:
<b>Fatal error</b>: Call to ...
0
votes
0answers
9 views
JavaScript eval performs much slower on company computer
In our IE specific web application, we are using eval a lot to call the JavaScript codes returned from server side. It's working OK for the last 5+ years. Just we got a strange issue reported from ...
0
votes
1answer
11 views
jmeter: Error invoking bsh method: eval
When i try to execute the following code in jmeter:
import org.json.JSONArray;
import org.json.JSONObject;
String jsonString = prev . . . ''
I get the following error:
ERROR - ...
2
votes
2answers
57 views
What does the asterisk do in Python other than multiplication and exponentiation?
In Peter Norvig's Lisp interpreter written in Python (http://norvig.com/lispy.html), he defines Lisp's eval as follows:
def eval(x, env=global_env):
"Evaluate an expression in an environment."
...
0
votes
1answer
82 views
Stop python eval() from removing brackets
A string variable is defined clause1 = "((1 & z[0]) != 0)"
Its eval() gives BoolRef: 1 & v__a != 0
while I actually need BoolRef: ((1 & v__a) != 0)
How to keep the brackets in eval() and ...
3
votes
2answers
60 views
capturing an expression as a function body in R
I'm trying to write a program that takes an expression as an input and returns a function with that expression bound as its body.
caller <- function (expr, params) {
Function <- function ...
-1
votes
1answer
63 views
Python stack ADT help evaluate infix expression
I am working on a project for school and our task is to evaluate a infix expression with a stack. We must use the stack class provided for us:
class Stack:
def __init__(self):
self.theStack=[]
...
2
votes
1answer
26 views
javascript eval context not contains parameters in chrome
I encountered a strange error today.
When I invoked the below function in chrome, I got:
var t = function(i){console.log(i);console.log(eval("i"));};
t("123");
//the result in chrome
...
2
votes
2answers
64 views
How to use defmacro instead of eval?
I have come up with the below function, which works as intended but it uses eval which is horrible, and does not exist in ClojureScript where i intend to use it.
(defn path [d p]
(eval
(concat ...
0
votes
2answers
68 views
Evaluating postfix using stack python
My task is to convert a fully parenthesized infix expression. Example
(((54+56)+(4+73))+(9+7))
to postfix. Then evaluate the postfix. The expression is input from the user.
I have to use a ...
0
votes
1answer
35 views
Understand this .bashrc script (curly braces, eval, …)
I have some difficulty understanding what is written in my ubuntu's .bashrc which is shown in part below.
Here is what I don't understand :
What is the purpose of curly braces and the -/+ symbols ...
0
votes
0answers
26 views
Using named arguments with Application.Run (or equiv)
I'm attempting to pass arguments to a VBA function via a string (user input from form)
The following code is throwing Runtime Error 2517 (Access cannot find the procedure '.') after it finishes ...
0
votes
1answer
29 views
Work around eval() in my chrome extension
I am having a problem with my chrome web app that im working on at the moment. The code works find on a normal chrome browser but the Chrome Web Store doesn't like my code:
Refused to evaluate ...
google-chrome-extension
0
votes
1answer
50 views
Modules in Javascript with eval();
Every javascript developer knows; eval is evil
But since i am looking for the ultimative module technology in javascript, i read something very interesting about someone using eval as a module ...
0
votes
0answers
41 views
Python Error: Unexpected EOF while Parsing
I'm writing a program that calls a list of bank accounts and print out their withdrawals, deposits, balances and transactions. I am running into a small error with my code on one of my inputs.
Now I ...
1
vote
2answers
39 views
Passing parts of commands around in bash robustly
I want to pass parts of commands around in bash so that:
commandpart=( --flags "filename" >/dev/null )
command "${commandpart[@]}"
Will evaluate to:
command --flags "filename" >/dev/null
...
0
votes
2answers
44 views
Evaluate javascript on a local html file (without browser)
This is part of a project I am working on for work.
I want to automate a Sharepoint site, specifically to pull data out of a database that I and my coworkers only have front-end access to.
I FINALLY ...
0
votes
1answer
35 views
Alternative to eval for dynamically evaluating mixed content strings (html + php) within php script
Let's just get right into it.
index.php
<?php
...
$url = "www.google.com";
$val = "Is PHP better than Perl?";
$file = file_get_contents("mixedcontent.txt");
print eval("?>" ...
0
votes
3answers
37 views
PHP variable value from string
How can I get value from variable which is string ?
$Member_Student = 3600;
$selectedItem = "Member_Student";
$price = "$" . $selectedItem;
print_r($price); //prints $Member_Student instead of ...
0
votes
0answers
37 views
Ternary operator using Eval vs Bind in asp.net
I can Use Eval in my ternary operator (If statement for those using google), but I cant seem to use it with a Bind statement, why?
Using Eval in if (Working) - If my date is a NULL value just ...
3
votes
1answer
25 views
Matlab alternative to eval for a large string
I need to define a variable in matlab using a very long string lets call it S. S contains the result of a symbolic calculation and I want to use that result in my matlab code. S is too long to copy ...
1
vote
1answer
39 views
how to eval regular expression with embedded perl code
So I tested out a regular expression that utilizes the experimental embedded code features. My tests worked, so I expounded upon it to do a more sophisticated script, but ran into errors. I traced ...
9
votes
1answer
105 views
match.call called in wrong environment when eval’ing
I tried implementing a function let with the following semantics:
> let(x = 1, y = 2, x + y)
[1] 3
… which is conceptually somewhat similar to substitute with the syntax of with.
The following ...
0
votes
1answer
15 views
OrientDB: AND operator inside eval() function
We have a very complex query and we are using eval() function to evaluate some data.
But it seems AND operator is not handled properly inside eval().
For example:
if(eval('#20:34 IN ...
0
votes
1answer
43 views
Why Pythons eval() mistakes?
I need to solve some mathematical equations, something like below (but each time different formula):
formula="(2/10^8*x^2)+0.0131*x-1017.3-30"
where x is an integer.
I used eval() function to ...
-2
votes
0answers
165 views
How can I add the __import__ function back into __builtins__? [closed]
I need to use __import__ through a call to eval, but __import__ and reload have both been deleted from __builtins__. Is there any way to add __import__ back in?
edit: I'm not writing the script I ...
1
vote
1answer
35 views
Racket R5RS “no #%app syntax transformer is bound”
I'm trying to execute the following R5RS code in Racket:
#lang r5rs
(define boo 100)
(define lib `(begin 88 99 99 ,boo))
(eval lib (interaction-environment))
However this results in the error:
...
1
vote
1answer
35 views
Obtain value from nested JSON dictionary via keypath without using eval
I want to access a nested JSON dictionary via dynamically constructed keypath.
The keypath uses standard JSON dot and subscript operators. (. and [x])
E.g.:
var data =
{"title": "a_title",
...
0
votes
2answers
45 views
MATLAB code doesn't work when I run it as a loop?
I'm assigning some files to variables in MATLAB. I'm a little lazy and trying to maybe demonstrate a little problem-solving, so I tried to write a function to do this. The body of the function:
i=0
...
0
votes
2answers
30 views
Avoiding eval(), I need a way to pass multiple arguments to a variable function
Trying to pass multiple parameters to a variable function call..
function myFunction(myvar,time){
alert(myvar);
}
t_function = "myFunction";
t_params = "haha,hehe";
...
