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When should I use nil and NULL in Objective-C?
...l null]];
[check addObject:nil];
On the second line, we will not get any error, because it is perfectly fair to insert a NSNull object into a collection type object. On the third line, we will get "object cannot be nil" error. Because nil is not an object.
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How to select unique records by SQL
...work, you can't select * after the distinct like that (you will get a 1064 error - Error in your SQL syntax)
– tim.baker
May 31 '17 at 8:47
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Include constant in string without concatenating
... an array that returns true when passed to is_callable would cause a fatal error when used inside a string:
class Arr
{
public static function get( $array, $key, $default = null )
{
return is_array( $array ) && array_key_exists( $key, $array )
? $array[$key]
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LLVM C++ IDE for Windows
...r, since it still uses a separate parser for C++, it doesn't catch as many errors as the compiler does.
Netbeans for java is integrated in with the compiler, so it gives errors and warnings as you type, as well as syntactically correct code completion. So, netbeans will very likely in the future in...
Jar Mismatch Found 2 versions of android-support-v4.jar in the dependency list
...created a new Android project and am trying to use the Library but get the error below:
14 Answers
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Source unreachable when using the NuGet Package Manager Console
... was trying to install an older version of jQuery, but it kept raising the error: "The source at nuget.org [nuget.org/api/v2/]". I don't know how to fix it though.
– Loudenvier
Jul 1 '15 at 17:17
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Are there disadvantages to using a generic varchar(255) for all text-based fields?
... strings from entering the RDBMS and causing buffer overruns or exceptions/errors later when retrieving and parsing values from the database that are longer (more bytes) than expected.
For example, if you have a field that accepts two-character strings for country abbreviations then you have no con...
Using ViewPagerIndicator library with Android Studio and Gradle
...dded the said dependency but it fails to resolve it on gradle build. Exact error: Failed to resolve: fr.avianey.com.viewpagerindicator:library:2.4.1 Any reason why?
– rockydgeekgod
Jun 7 '15 at 21:25
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How to convert a string into double and vice versa?
...FromString:] to get an NSNumber from it. If you want to handle conversion errors, you can use -[NSFormatter getObjectValue:forString:range:error:] instead.
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RegEx match open tags except XHTML self-contained tags
... ~10k pages, all with the same HTML template. They were littered with HTML errors that caused parsers to choke, and all their styling was inline or with <font> etc.: no classes or IDs to help navigate the DOM. After fighting all day with the "right" approach, I finally switched to a regex solu...