you can use the “use strict” to contain the eval’ed code within the eval itself. Second, eval of strict mode code does not introduce new variables into the surrounding scope. In normal code eval(“var x;”) introduces a variable x into the surrounding function or the global scope. This means that, in general, in a function … Read more
Short answer: No. If it’s in the global scope, it’s available to anything. Long answer: if you’re eval()ing untrusted code that really wants to read or mess with your execution environment, you’re screwed. But if you own and trust all code being executed, including that being eval()ed, you can fake it by overriding the execution … Read more
Even clearer, IMO, is: <%# String.Format(“{0} – {1}”, Eval(“Name1”), Eval(“Name2”)) %>
I think you’re looking for something like this: SET @queryString = ( SELECT CONCAT(‘INSERT INTO user_group (`group_id`,`user_id`) VALUES ‘, www.vals) as res FROM ( SELECT GROUP_CONCAT(qwe.asd SEPARATOR ‘,’) as vals FROM ( SELECT CONCAT(‘(59,’, user_id, ‘)’) as asd FROM access WHERE residency = 9 ) as qwe ) as www ); PREPARE stmt FROM @queryString; … Read more
Because sometimes there is a need. All the same reasons for/against using eval in JavaScript can likely be shared with the use of reflection in Java, for example. However, I agree with everything you quoted in your question. Many reasons for using it are ill-advised, and best done differently – but sometimes, there is still … Read more
eval accepts a sequence of Javascript statements. The Javascript parser interprets the ‘{’ token, occuring within a statement as the start of a block and not the start of an object literal. When you enclose your literal into parentheses like this: ({ data_from_the_wire }) you are switching the Javascript parser into expression parsing mode. The … Read more
The syntax is <%# Eval(“…”) %> You could do something like <asp:ImageButton Visible=”<%# ShowImg(Eval(Container.DataItem,”Message”)) %>” /> and in your codebehind: boolean ShowImg(string msg) { return (msg == HttpContext.Current.Profile.UserName); }
Eval(“State”) is a simplified form of the DataBinder.Eval(Container.DataItem, “State”) syntax. It only works inside of data-bound template controls. For more info, see the MSDN documentation.
Use exec: exec ‘import vfs_tests as v’ eval works only on expressions, import is a statement. exec is a function in Python 3 : exec(‘import vfs_tests as v’) To import a module using a string you should use importlib module: import importlib mod = importlib.import_module(‘vfs_tests’) In Python 2.6 and earlier use __import__.