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POWriting a simple NSpredicate - Logic Issue
 

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  1. POWriting a simple NSpredicate - Logic Issue
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    <p>I have a <code>Person</code> object. and this <code>person</code> object has the following attributes;</p> <pre><code>Name StartDate EndDate </code></pre> <p>I am saving this <code>Person</code> objects to an <code>array</code>. This array might contain more than <code>100 person</code> objects.</p> <p>The following is an example of <code>person</code> objects in that array;</p> <pre><code>John, Tue Feb 22, Thr Mar 30 Jack, Wed Mar 09, Fri Apr 21 Jack, Thu Mar 19, Fri Dec 20 Jack, Tue Jan 08, Fri Apr 26 etc.. </code></pre> <p>Now i need to will supply a date, say for example <code>Wed 29 Mar</code>, and i need to check if it's in the range of <code>StartDate</code> and <code>EndDate</code> in the array of <code>persons</code> object. How can i do this ? My working are as follows, but it doesn't work (It gives incorrect results)</p> <pre><code>NSPredicate *datePred = [NSPredicate predicateWithFormat:@"StartDate&gt;= %@ &amp;&amp; EndDate&lt;= %@",givenDate,givenDate]; resultArray = [arrayContainingAllPersonObjects filteredArrayUsingPredicate:datePred ]; </code></pre> <p>I also tried the following method, but it too gives incorrect results (which was taken off a SO post);</p> <pre><code>NSPredicate *greaterThanPredicate = [NSPredicate predicateWithFormat:@"StartDate&lt;= %@", providedDate"]; NSPredicate *lessThanPredicate = [NSPredicate predicateWithFormat:@"EndDate&gt;= %@", ProvidedDate"]; NSPredicate *betweenPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:greaterThanPredicate, lessThanPredicate, nil]]; </code></pre> <p>I have no clue as in what is causing this, Help</p>
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    1. USshajem
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    1. COI have referred to the following guide when having to do calendrical calculations: [Apple Date and Time Programming Guide](https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DatesAndTimes/DatesAndTimes.html). The section on Calendrical calculations shows examples of how to determine if a given date is within a date range.
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      1. USDean
    2. COCould you tell me which example to read precisely?
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      1. USshajem
    3. COAre `StartDate` and `EndDate` of `NSDate` type?
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      1. POWriting a simple NSpredicate - Logic Issue
      1. USCostique
 

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