Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>As Squeegy said, all of the above methods you reference return autoreleased objects. The second code example will crash because you are overreleasing the string objects.</p> <p>Squeegy pointed one way of handling this, using NSMutableStrings. I'd recommend that approach. For example, the following rewrite of your method:</p> <pre><code>-(NSString*) unescape:(NSString*)string { NSMutableString *unescapedString = [[NSMutableString alloc] initWithString:string]; [unescapedString replaceOccurrencesOfString:@"&amp;apos;" withString:@"'" options:0 range:NSMakeRange(0, [unescapedString length])]; [unescapedString replaceOccurrencesOfString:@"&amp;amp;" withString:@"&amp;" options:0 range:NSMakeRange(0, [unescapedString length])]; [unescapedString replaceOccurrencesOfString:@"&amp;quot;" withString:@"\"" options:0 range:NSMakeRange(0, [unescapedString length])]; [unescapedString replaceOccurrencesOfString:@"&amp;gt;" withString:@"&gt;" options:0 range:NSMakeRange(0, [unescapedString length])]; [unescapedString replaceOccurrencesOfString:@"&amp;lt;" withString:@"&lt;" options:0 range:NSMakeRange(0, [unescapedString length])]; return [unescapedString autorelease]; } </code></pre> <p>only returns an autoreleased NSMutableString at the end. </p> <p>Even better would be if you passed in a pointer to an NSMutableString pointer (NSMutableString **). That way, you could modify the string that you'd created outside of your method without creating a new temporary string. If this seems strange, take a look at methods that deal with NSError instances as an example.</p> <p>EDIT: Ignore my statement about needing a double pointer in the previous paragraph. As erikprice points out, you just need to pass in an NSMutableString pointer. The double pointer is only needed if you create a new NSMutableString instance in your method to replace the one being passed in, which is not the case here.</p>
    singulars
    1. This table or related slice is empty.
    1. POString manipulation without memory leaks?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USBrad Larson
    1. USBrad Larson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhy would it need to be a pointer to an NSMutableString pointer? I would think that the "point" (heh) of using a NSMutableString is that it's mutable, so couldn't you just pass in a simple NSMutableString pointer, and have the method body mutate the NSMutableString it points to?
      singulars
      1. PO
      1. USerikprice
    2. COYou're right. For some reason, I was thinking about creating an entirely new instance within the method, which is what happens with NSError. I'll fix the text.
      singulars
      1. PO
      1. USBrad Larson
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload