A check to see that an object has been instantiated.
Since TypeScript is strongly-typed, simply using if () {} to check for null and undefined doesn't sound right. Does TypeScript have any …
typescript null-checkI know that below are the two ways in JavaScript to check whether a variable is not null, but I’…
javascript comparison null-checkI've come across the following code: function test(data) { if (data != null && data !== undefined) { // some code here } } I'm …
javascript null undefined null-checkif((isnull(@value,''))='') I want to know whether the above piece of code works in checking if the …
sql sql-server-2008 null null-checkI need to create a null check in this formula for the books[i] and I am not entirely sure …
java null-checkI'm trying to do a null check on a String but it won't work. <s:iterator value="matrix" var="…
jsp struts2 null-checkWhat's the best way to check for not null values in java. String query ="abcd"; query != null vs !query.equals(…
java string null null-checkHow do I perform a null-check on a dynamic object? Pseudo code: public void Main() { dynamic dynamicObject = 33; if(true) { // Arbitrary …
c# dynamic null-checkI am writing a utility method which can check for empty and null string, or collection or an object or …
java performance string null-checkI have a piece of code where an interface has an Optional return method and some of the classes that …
java java-8 optional null-check