Credits to http://moeffju.net/blog/using-bigint-columns-in-rails-migrations class CreateDemo < ActiveRecord::Migration def self.up create_table :demo, :id => false do |t| t.integer :id, :limit => 8 end end end See the option :id => false which disables the automatic creation of the id field The t.integer :id, :limit => 8 line will produce a 64 bit integer field
The overwhelming majority of the time, one of int main(void) or int main(int argc, char* argv[]) is what you need to use. In particular, if you’re writing a program that’s going to be compiled by any major compiler for running on a personal computer, with the full set of the C standard libraries, then you … Read more
I took an Int type and then tried to cast it as a Double by saying num as Double <…> However, this failed, saying that Int cannot be cast to Double. I am assuming this is because it is built off the Integer class rather than the raw int data type. No, and there are … Read more
Using unsigned can introduce programming errors that are hard to spot, and it’s usually better to use signed int just to avoid them. One example would be when you decide to iterate backwards rather than forwards and write this: for (unsigned i = 5; i >= 0; i–) { printf(“%d\n”, i); } Another would be … Read more
Int32.TryParse(String, Int32) – http://msdn.microsoft.com/en-us/library/f02979c7.aspx bool result = Int32.TryParse(value, out number); if (result) { Console.WriteLine(“Converted ‘{0}’ to {1}.”, value, number); }
Adding to jelovirt’s answer, you can use number() to convert the value to a number, then round(), floor(), or ceiling() to get a whole integer. Example <xsl:variable name=”MyValAsText” select=”‘5.14′”/> <xsl:value-of select=”number($MyValAsText) * 2″/> <!– This outputs 10.28 –> <xsl:value-of select=”floor($MyValAsText)”/> <!– outputs 5 –> <xsl:value-of select=”ceiling($MyValAsText)”/> <!– outputs 6 –> <xsl:value-of select=”round($MyValAsText)”/> <!– outputs 5 … Read more
I personally don’t like atoi function. I would suggest sscanf: char myarray[5] = {‘-‘, ‘1’, ‘2’, ‘3’, ‘\0′}; int i; sscanf(myarray, “%d”, &i); It’s very standard, it’s in the stdio.h library 🙂 And in my opinion, it allows you much more freedom than atoi, arbitrary formatting of your number-string, and probably also allows for non-number … Read more
Bad choices on the part of the implementors? Seriously, according to the standard, “Plain ints have the natural size suggested by the architecture of the execution environment”, which does mean a 64 bit int on a 64 bit machine. One could easily argue that anything else is non-conformant. But in practice, the issues are more … Read more
Because the int value is promoted to an unsigned int. specifically 0xFFFFFFFC on a 32-bit machine, which as an unsigned int is 4294967292, considerably larger than 10 C99 6.3.1.1-p2 If an int can represent all values of the original type (as restricted by the width, for a bit-field), the value is converted to an int; … Read more
It is possible that you are looking for trunc. It depends on what you mean by the decimal part. This is the difference between trunc and floor: julia> trunc(Int, 1.2) 1 julia> trunc(Int, -1.2) -1 julia> floor(Int, 1.2) 1 julia> floor(Int, -1.2) -2