I am curious whether initializing a variable of type T using the following code is any good for type stability. The type is usually alot more complex than the example used below with significant allocations and a dependence on the conditions, so I don’t want to initialize a full instance before the …

if declared inside the if statement, it will not be visible outside I don’t think this is true - if blocks don’t introduce new scope. Do you have a minimum working example of a case where you can’t access something allocated inside an if block?

I had a few cases before where declaring a variable with nothing seemed to have solved an error, so I thought this was true. Thanks for correcting me. I will remove this declaration.

Variables declared inside a for-loop on the other hand are not visible outside the for-loop. What’s the preferred way of making them visible outside? local x for it in iter x = something end Perhaps?

is this still correct for an array.

What is still correct for an array?

if i define an array with local without initializing is it allowed. thanks

You can declare a variable, including an array, without initializing the variable. Defining the array IS initializing it.

Initializing an object with `nothing`

New to Julia

yuyichao June 23, 2017, 10:54am 3

Also, it’ll hurt type stability and the syntax for declaring local variable is local.

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Initializing an object with `nothing`

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