I am trying to print an integer in JavaScript with commas as thousands separators. For example, I want to show the number 1234567 as “1,234,567”. How would I go about doing this? Here is how I am doing it: function numberWithCommas(x) { x = x.toString(); var pattern = /(-?\d+)(\d{3})/; while (pattern.test(x)) x = x.replace(pattern, “$1,$2”); … Read more
What’s the cleanest, most effective way to validate decimal numbers in JavaScript? Bonus points for: Clarity. Solution should be clean and simple. Cross-platform. Test cases: 01. IsNumeric(‘-1’) => true 02. IsNumeric(‘-1.5’) => true 03. IsNumeric(‘0’) => true 04. IsNumeric(‘0.42’) => true 05. IsNumeric(‘.42’) => true 06. IsNumeric(‘99,999’) => false 07. IsNumeric(‘0x89f’) => false 08. IsNumeric(‘#abcdef’) … Read more
Java – Convert integer to string [duplicate] – Read For Learn Skip to content There are multiple ways: String.valueOf(number) (my preference) “” + number (I don’t know how the compiler handles it, perhaps it is as efficient as the above) Integer.toString(number) Categories Java Tags int, java, numbers, string Post navigation
but as for this method, I don’t understand the purpose of Integer.MAX_VALUE and Integer.MIN_VALUE. By starting out with smallest set to Integer.MAX_VALUE and largest set to Integer.MIN_VALUE, they don’t have to worry later about the special case where smallest and largest don’t have a value yet. If the data I’m looking through has a 10 … Read more
Long is the Object form of long, and Integer is the object form of int. The long uses 64 bits. The int uses 32 bits, and so can only hold numbers up to ±2 billion (-231 to +231-1). You should use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.collections methods usually use the boxed (Object-wrapped) versions, because they need to work for any Object, and … Read more
You could use e.g. r.nextInt(101) For a more generic “in between two numbers” use: Random r = new Random(); int low = 10; int high = 100; int result = r.nextInt(high-low) + low; This gives you a random number in between 10 (inclusive) and 100 (exclusive)
