Eval: Dead Code Detection With Call Graph Vs Grep Baseline

Eval function try to execute and interpret the string (argument) passed to it as python code. X=1 print (eval ('x+1')) output of the above code will be 2. After reading the bash man pages and with respect to this post, i am still having trouble understanding what exactly the eval command does and which would be its typical uses.

The eval function is a powerful and easy way to dynamically generate code, so what are the caveats? Jan 7, 2015eval evaluates a string of javascript code without reference to a particular object. If you construct an arithmetic expression as a string, you can use eval to evaluate it at a later.

Dec 1, 2009this question cannot be language-agnostic because of the special role of block eval in perl as the primary exception handling mechanism. Eval is a bash-builtin and is documented in the man page of bash. So just type "man bash" and search for the appropriate section for eval.

Eval makes it possible to execute (or evaluate) a string of javascript code. Thus, it is applicable when you want someone to execute a string of javascript code. Sep 13, 2011i need to evaluate a custom function passed from the server as a string.

Oct 13, 2008to the point, let's look at the dangers in the use of eval (). Apr 8, 2011by the way, there are many ways to avoid using exec / eval if all you need is a dynamic name to assign, e.g. You could use a dictionary, the setattr function, or the locals().