Array copy element number join find query location

#import <Foundation/Foundation.h>

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

@autoreleasepool {

Array

Quickly create an array

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

NSLog (@ "%@", week);

Create an empty array

Nsarray *arr=[[nsarray Alloc]init];

Nsarray *arr1=[nsarray Array];

Note Array connection uses nil (null) to end non-delete

Nsarray *arr2=[nsarray arraywithobjects:@ "Das", @ "DSA", nil];

Nsarray *arr3=[nsarray arraywithobject:@ "B"];

Copy

Nsarray*new=[nsarray Arraywitharray:week];

NSLog (@ "%@", new);

Gets the number of elements in the array

Nsinteger count=[new Count];

NSLog (@ "Number:%ld", count);

Accessing elements within an array based on a number of subscripts

NSString *str=[new Objectatindex:1];

NSLog (@ "%@", str);

Add an element to an array

Nsarray *add=[new arraybyaddingobject:@ "SDFG"];

NSLog (@ "%@", add);

Connection

NSString *new1=[new componentsjoinedbystring:@ ","];

NSLog (@ "%@", New1);

Determine if an array contains a single object

BOOL resu=[new containsobject:@ "THU"];

NSLog (@ "%d", resu);

Querying the position of an object in an array

Nsinteger index=[new indexofobject:@ "THU"];

NSLog (@ "%d", (int) index+1);

Gets the last element of the array

NSString *lastring=[new Lastobject];

NSLog (@ "%@", lastring);

}

return 0;

}

Array copy element number join find query location