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Error type 3 Error: Activity class {} does not exist
... uninstall properly. To verify and fix this:
Go to Settings.
Go to Apps.
Select your app. (here, you can verify that your app is not uninstalled properly).
Open the overflow menu on the top right and select Uninstall for all users.
Done. Try to install then launch your app again.
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SET NAMES utf8 in MySQL?
... client, thus is also needed when receiving this data, using for example a SELECT statement.
– Leopoldo Sanczyk
Nov 20 '15 at 20:54
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Are there good reasons not to use an ORM? [closed]
...honestly it isn't. Using an ORM tool means the tool/developer can insert, select, update or delete whatever he or she wants. Stored procedures provide a lot more security, especially in environments when dealing with client data. I think this is the biggest reason to consider. Security.
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filtering NSArray into a new NSArray in Objective-C
...y indexesOfObjectsPassingTest:] or write your own category to add a handy -select: or -filter: method (example).
Want somebody else to write that category, test it, etc.? Check out BlocksKit (array docs). And there are many more examples to be found by, say, searching for e.g. "nsarray block catego...
How to enter a multi-line command
...e grave accent (backtick):
Get-ChildItem -Recurse `
-Filter *.jpg `
| Select LastWriteTime
However, this is only ever necessary in such cases as shown above. Usually you get automatic line continuation when a command cannot syntactically be complete at that point. This includes starting a new...
How to call an async method from a getter or setter?
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You can use Task like this :
public int SelectedTab
{
get => selected_tab;
set
{
selected_tab = value;
new Task(async () =>
{
await newTab.ScaleTo...
How can I restore the MySQL root user’s full privileges?
...Then execute this query:
insert into `user` (`Host`, `User`, `Password`, `Select_priv`, `Insert_priv`, `Update_priv`, `Delete_priv`, `Create_priv`, `Drop_priv`, `Reload_priv`, `Shutdown_priv`, `Process_priv`, `File_priv`, `Grant_priv`, `References_priv`, `Index_priv`, `Alter_priv`, `Show_db_priv`, ...
How to change the output color of echo in Linux
...use different numbers, not given here.
Text mode commands
tput bold # Select bold mode
tput dim # Select dim (half-bright) mode
tput smul # Enable underline mode
tput rmul # Disable underline mode
tput rev # Turn on reverse video mode
tput smso # Enter standout (bold) mode
tput...
XPath with multiple conditions
What XPath can I use to select any category with a name attribute specified and any child node author with the value specified.
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django test app error - Got an error creating the test database: permission denied to create databas
...@localhost; I originally tried to only GRANT CREATE... but then could not SELECT or DROP the created database. This essentially makes your user a superuser, so be careful.
– mightypile
Dec 31 '15 at 16:28
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