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iOS start Background Thread
...ou'd probably be better off using Grand Central Dispatch, though:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self getResultSetFromDB:docids];
});
GCD is a newer technology, and is more efficient in terms of memory overhead and lines of code.
Updated w...
get dictionary key by value
...ce where all fields are initialized with their default value(like null for strings or 0 for ints). So you won't get an exception. But you also don't know if you have found a value, so this answer doesn't cover the case that the value doesn't exist.
– Tim Schmelter
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How to try convert a string to a Guid [duplicate]
...thod for the Guid. I’m wondering how others handle converting a guid in string format into a guid type.
6 Answers
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Should try…catch go inside or outside a loop?
... to the loop itself!
class Parsing
{
public static Float MyParseFloat(string inputValue)
{
try
{
return Float.parseFloat(inputValue);
}
catch ( NumberFormatException e )
{
return null;
}
}
// .... your code
...
Android Lint contentDescription warning
... android:contentDescription for my ImageView
android:contentDescription="@string/desc"
Android Lint support in ADT 16 throws this warning to ensure that image widgets provide a contentDescription.
This defines text that briefly describes content of the view. This property is used primarily for a...
HttpWebRequest using Basic authentication
...he name "Authorization" and the value "Basic BASE64({USERNAME:PASSWORD})"
String username = "abc";
String password = "123";
String encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + password));
httpWebRequest.Headers.Add("Authorization",...
How do I force Postgres to use a particular index?
...of why and what you can do instead can be found here. The reasons are basically that it's a performance hack that tends to cause more problems later down the line as your data changes, whereas PostgreSQL's optimizer can re-evaluate the plan based on the statistics. In other words, what might be a go...
Clear Application's Data Programmatically
... (ActivityManager)activity.getSystemService(Context.ACTIVITY_SERVICE);
String myProcessPrefix = activity.getApplicationInfo().processName;
String myProcessName = activity.getPackageManager().getActivityInfo(activity.getComponentName(), 0).processName;
for (ActivityManager.RunningAppProce...
Programmatically fire button click event?
Is there a way to programmatically fire a button click event? I have a button placed there in an UIView, and in a particular scenario i want to click the button via code, not manually as a user. Is it possible in iOS development? Please provide your suggestions and guide me how to do that.
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Why a function checking if a string is empty always returns true? [closed]
I have a function isNotEmpty which returns true if the string is not empty and false if the string is empty. I've found out that it is not working if I pass an empty string through it.
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