From section 1.1 Boolean Datatype of the docs: SQLite does not have a separate Boolean storage class. Instead, Boolean values are stored as integers 0 (false) and 1 (true). So it looks like you are stuck with 0 and 1.
I recommend using Random.nextBoolean() That being said, Math.random() < 0.5 as you have used works too. Here’s the behavior on my machine: $ cat myProgram.java public class myProgram{ public static boolean getRandomBoolean() { return Math.random() < 0.5; //I tried another approaches here, still the same result } public static void main(String[] args) { System.out.println(getRandomBoolean()); } … Read more
Yes. Reads and writes of the following data types are atomic: bool, char, byte, sbyte, short, ushort, uint, int, float, and reference types. as found in C# Language Spec. Edit: It’s probably also worthwhile understanding the volatile keyword.
True is equal to 1. >>> sum([True, True, False, False, False, True]) 3
Use the unary + operator, which converts its operand into a number. + true; // 1 + false; // 0 Note, of course, that you should still sanitise the data on the server side, because a user can send any data to your sever, no matter what the client-side code says.
It’s a conditional assignment. From here: x = find_something() #=>nil x ||= “default” #=>”default” : value of x will be replaced with “default”, but only if x is nil or false x ||= “other” #=>”default” : value of x is not replaced if it already is other than nil or false
The other likely size for it is that of int, being the “efficient” integer type for the platform. On architectures where it makes any difference whether the implementation chooses 1 or sizeof(int) there could be a trade-off between size (but if you’re happy to waste 7 bits per bool, why shouldn’t you be happy to … Read more
The argument of the ! operator and the first argument of the ternary operator are both implicitly converted to bool, so !! and ?: are IMO silly redundant decorations of the cast. I vote for b = (t != 0); No implicit conversions.
You can set your boolean by using: [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@”logged_in”]; [[NSUserDefaults standardUserDefaults] synchronize]; and read it by using this code: if(![[NSUserDefaults standardUserDefaults] boolForKey:@”logged_in”]) { [self displayLogin]; } else { [self displayMainScreen]; }
var val = (string === “true”);