What is isEqual?
Returns a Boolean value that indicates whether the receiver and a given object are equal.
What is NSTaggedPointerString?
The NSTaggedPointerString values are numbers that are used repeatedly, so it’s an in memory Objective C optimisation. The problem is that NSDictionary isEqual fails because NSTaggedPointerString is an NSString type rather than an NSNumber.
How do you append text in Objective C?
The format specifier “%@” is used to insert string values. The example below uses a combination of whitespace and %@ format specifiers to append two strings to string1: NSString * string3 = [string1 stringByAppendingFormat:@” %@ %@”, string2, @”A third string.
How do I add strings in Objective C?
Without further delay, string concatenation in objective-c:
- NSString -stringByAppendingString: stringByAppendingString is the go to method appending to a given string in order to build a new string.
- NSString -stringWithFormat:
- NSMutableString -appendString:
- NSArray -componentsJoinedByString:
How do you use equal in Java?
Java String equals() Method Example 2
- public class EqualsExample2 {
- public static void main(String[] args) {
- String s1 = “javatpoint”;
- String s2 = “javatpoint”;
- String s3 = “Javatpoint”;
- System.out.println(s1.equals(s2)); // True because content is same.
- if (s1.equals(s3)) {
- System.out.println(“both strings are equal”);
How do I use Isequal in Matlab?
y = isequal( T,U,… ) returns logical 1 ( true ) if all the numerictype object inputs have the same properties. Otherwise, it returns logical 0 ( false ). y = isequal( q,r,… ) returns logical 1 ( true ) if all the quantizer object inputs have the same properties. Otherwise, it returns logical 0 ( false ).
How do I compare two nsstrings with the same instance?
When you define a constant NSString using @””, the compiler uniquifies the reference. When the same constants are defined in other places in your code, they will all point to the same actual location in memory. When comparing NSString instances, you should use the isEqualToString: method:
How do I compare two strings in Cocoa?
In Cocoa strings are compared using NSString’s isEqualToString: method. Pointer comparison works in your case because the compiler is gentle enough to merge the two string literals to point to one object. There’s no guarantee that two identical strings share one NSString instance.
Should I use isequal or isequaltostring when comparing strings?
However, strings created by other means may contain identical data, yet be stored at different memory locations. Hence, you should always use isEqual: when comparing strings. Note that isEqual: and isEqualToString: always return the same value, but isEqualToString: is faster.