create or overwrite functions with Eval()
Is it possible to use Eval() to create a function? Say I want to make a way of live-patching an app, by bringing down some code via http and then running it with Eval(). Can I actually create a new ...
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Sure. Eval() runs in the context of the channel, so anything executed in your Eval'd string will apply to the variables in the running app.
For example:
should output to the console:
Likewise, since BrightScript supports anonymous functions, the following should produce the same results:
Note, the colons are used strictly for brevity in the example. The string you're Eval'ing can have carriage returns.
For example:
testVar = 100
print "Before:"; testVar
Eval("testVar = 0")
print "After:"; testVar
should output to the console:
Before: 100
After: 0
Likewise, since BrightScript supports anonymous functions, the following should produce the same results:
testFunc = Function()
Return 100
End Function
print "Before:"; testFunc()
Eval("testFunc = Function():Return 1:End Function")
print "After:"; testFunc()
Note, the colons are used strictly for brevity in the example. The string you're Eval'ing can have carriage returns.
