30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
public class MySetController{
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public Set<String> strSet {get; private set; }
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public Set<Id> idSet {get; private set; }
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public MySetController(){
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//Initialize to an already known collection. Results in a set of abc,def.
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this.strSet = new Set<String>{'abc','abc','def'};
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//Initialize to empty set and add in entries.
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this.strSet = new Set<String>();
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this.strSet.add('abc');
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this.strSet.add('def');
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this.strSet.add('abc');
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//Results in {'abc','def'}
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//You can also get a set from a map in Apex. In this case, the account ids are fetched from a SOQL query.
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Map<Id,Account> accountMap = new Map<Id,Account>([Select Id,Name From Account Limit 10]);
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Set<Id> accountIds = accountMap.keySet();
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//If you have a set, you can also use it with the bind variable syntax in SOQL:
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List<Account> accounts = [Select Name From Account Where Id in :accountIds];
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//Like other collections in Apex, you can use a for loop to iterate over sets:
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for(Id accountId : accountIds){
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Account a = accountMap.get(accountId);
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//Do account stuffs here.
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}
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}
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}
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