A reference is an entity that is an alias for another object. A reference is not a variable as a variable is only introduced by the declaration of an object. An object is a region of storage and, in C++, references do not (necessarily) take up any storage. As objects and references are distinct groups … Read more
The awk solution is what I would use, but if you want to understand your problems with bash, here is a revised version of your script. #!/bin/bash -vx ##config file with ip addresses like 10.10.10.1:80 file=config.txt while read line ; do ##this line is not correct, should strip :port and store to ip var ip=$( … Read more
According to this website: parseInt is occasionally used as a means of turning a floating point number into an integer. It is very ill suited to that task because if its argument is of numeric type it will first be converted into a string and then parsed as a number… For rounding numbers to integers … Read more
You could just unpack the variables: global x, y, z x, y, z = 4, 5, 6
For me, the correct answer is: You should pass in as many variables as is required to setup the object in a state that is not invalid. Anything else that is “option”, I prefer to leave as properties, especially now that C# provides object initializers.
The variable scope is the whole batch in this case a stored procedure. It isn’t re-declared every loop So this is exactly as expected Edit: There is a recent blog article which is quite similar. The author was quickly corrected 🙂
The language defines it this way. Instance variables of object type default to being initialized to null. Local variables of object type are not initialized by default and it’s a compile time error to access an undefined variable. See section 4.12.5 for SE7 (same section still as of SE14) http://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.12.5
Workarounds for not being able to use variables in a sequence brace expression: If the intent is merely to iterate over numbers in a range – as in the OP’s case – the best choice is not to use brace expansion, but instead use bash’s C-style loop – see user000001’s answer. If the specific numbers … Read more