Add an element to the array (replace delete insert)

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {

@autoreleasepool {

Variable groups inherit immutable groups

1. Create a set number of elements

Nsmutablearray *mutarr=[nsmutablearray Arraywithcapacity:7];

2. Add an element to the array

Nsarray *[email protected][@ "MON", @ "TUE", @ "WED", @ "THU", @ "FRI", @ "SAT", @ "SUN"];

Nsmutablearray *mutarray=[nsmutablearray Arraywitharray:arr];

[Mutarray addobject:@ "EIG"];

3. Insert the element according to the specified subscript

[Mutarray insertobject:@ "NINE" atindex:8];

4. Delete the last element

[Mutarray Removelastobject];

5. Delete the element according to the specified subscript

[Mutarray Removeobjectatindex:7];

6. Delete According to the specified object

[Mutarray removeobject:@ "SUN"];

7. Replace the element with the specified subscript

[Mutarray replaceobjectatindex:0 withobject:@ "SUN"];

for (id str in mutarray) {

NSLog (@ "%@", str);

}

}

return 0;

}

Add an element to the array (replace delete insert)