IOS Parse How to search an array of strings for a substring?

Question

I am using a parse database to store some records. I am storing an array of strings and I want to be able to search this array for substrings. Here is an example:

Array A:

["carbrown","blue","house","coldturkey"]

Array B:

["racecar","green","walking"]

Array C:

["greenturkey","users","published","ramp"]

I want to be able to search for a substring like car and get Arrays A and B as matching results, Or searching for turkey gives me matching results with arrays A and C, Or green gives me Arrays B and C, and so on..

I know that for strings you can use this in parse:

- (void)whereKey:(NSString *)key containsString:(NSString *)substring

Is this possible with arrays, maybe something with regex?

hi @SuperKevin did you found a solution for this question ?

LHIOUI
– LHIOUI

2016-01-22 17:41:49 +00:00
Commented Jan 22, 2016 at 17:41 — LHIOUI
– LHIOUI, Commented Jan 22, 2016 at 17:41

gabbler · Accepted Answer · 2014-11-08 09:50:40Z

2

You can use NSPredicate for this purpose. The following is an example.

NSArray *a = @[@"carbrown",@"blue",@"house",@"coldturkey"];
NSArray *b = @[@"racecar",@"green",@"walking"];
NSArray *c = @[@"greenturkey",@"users",@"published",@"ramp"];

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains[cd] %@", @"car"];
NSArray *filteredArrayA = [a filteredArrayUsingPredicate:predicate];
NSArray *filteredArrayB = [b filteredArrayUsingPredicate:predicate];
NSArray *filteredArrayC = [c filteredArrayUsingPredicate:predicate];

if ([filteredArrayA count]) {
    NSLog(@"A has car in it");
}

answered Nov 8, 2014 at 9:50

gabbler

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2 Comments

Kevin Pimentel Over a year ago

Thank you, but these arrays are in the parse system. I am asking how I can pull these matching values from parse, I do not have these arrays in memory.

gabbler Over a year ago

Sorry, I don't know. Not familiar with Parse.

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