CRACK Zip And RAR Password Cracker
Q:
Is there a Perl equivalent to a JS Math.random()?
Is there a Perl equivalent to a JS Math.random()? 
I am trying to avoid requiring an external module.
A:
Borrowing from Jeff Moden's answer:
use Math::Random 'rand';
print (rand(0,2147483647))
However, use of rand in this way is unsafe.
This code will loop forever if the number of collisions between 2^32 number of possible values of Math::Random::rand is > 0.2%. 
You can check the number of collisions with this:
my $n_rand_collisions = `perl -e 'print int rand(0,2147483647)'`;
It should return 0 if there are no collisions, which means the random number generator can be trusted. 
You should take this in to account when choosing the value of min and max parameters for rand(). 
Another (probably better) way to use rand is to use a range based solution:
use Math::Random 'rand';
print (rand(1,2147483647))
Q:
How to construct a query that returns specific range of values from a column in Postgres
I have a table which is currently returning data like this:
+-----------------+---------+
|  column_name    |  value  |
+-----------------+---------+
|  row_1_name     |  some   |
+-----------------+---------+
|  row_2_name     |  some   |
+-----------------+---------+
|  row_3_name     |  some   |
+-----------------+---------+
and I want to return the data that is in rows which are in a certain range of values. For example, I would like to return all data from a column which has a value that is between 100 and 200 (stored in the range_from and range_to column in my table). Is there a way to construct a SQL query which will return the data that meets this criterion? 
A:
If the values are stored as text you could do something like this:
SELECT *
FROM tbl
WHERE value BETWEEN '100'::TEXT AND '200
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