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Detect backspace in empty UITextField
...ss UITextField and implement canPerformAction:withSender: to return NO for select: and selectAll: actions when the text is equal to the string @"\u200B".
– ma11hew28
Oct 19 '11 at 21:56
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Using different Web.config in development and production environment
... test, staging and production) we developed a system where the application selected the appropriate configuration based on the machine name it was deployed to.
This worked for us because:
administrators could deploy applications without involving developers (a requirement) and without having to f...
Find all records which have a count of an association greater than zero
...> 17
[14] pry(main)> Article.joins(:comments).distinct.to_sql
=> "SELECT DISTINCT \"articles\".* FROM \"articles\" INNER JOIN \"comments\" ON \"comments\".\"article_id\" = \"articles\".\"id\""
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Is there any way to prevent input type=“number” getting negative values?
...tive number from keyboard.
Solution is to prevent with key code:
// Select your input element.
var number = document.getElementById('number');
// Listen for input event on numInput.
number.onkeydown = function(e) {
if(!((e.keyCode > 95 && e.keyCode < 106)
|| (e....
Flash CS4 refuses to let go
...ation Support/
You can remove those files by hand, or in Flash you can select Control->Delete ASO files to remove them.
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Is it possible to break a long line to multiple lines in Python [duplicate]
...or you will get a list of strings instead of one long string:
queryText= "SELECT * FROM TABLE1 AS T1"\
"JOIN TABLE2 AS T2 ON T1.SOMETHING = T2.SOMETHING"\
"JOIN TABLE3 AS T3 ON T3.SOMETHING = T2.SOMETHING"\
"WHERE SOMETHING BETWEEN <WHATEVER> AND <WHATEVER ELSE>"\
"ORDER BY WHATEVERS DE...
Change Checkbox value without triggering onCheckChanged
... The doc reads "Called when the checked radio button has changed. When the selection is cleared, checkedId is -1". This is really misleading, it should either have the isChecked passed through as well.
– AA_PV
Jan 3 '17 at 22:10
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psql: FATAL: database “” does not exist
...euser --interactive
When prompted for role name, enter linux username, and select Yes to superuser question.
Still logged in as postgres user, create a database: createdb <username_from_step_3>
Confirm error(s) are gone by entering: psql at the command prompt.
Output should show psql (x.x.x) T...
Changing the default header comment license in Xcode
...o change the organization name in Xcode click on the project file so it is selected (left sidebar of Xcode in the Project navigator) > In the File Inspector (right sidebar of Xcode) change the Organization text box.
sha...
onMeasure custom view explanation
... there's absolutely no need for you to override it.
Devunwired code (the selected and most voted answer here) is almost identical to what the SDK implementation already does for you (and I checked - it had done that since 2009).
You can check the onMeasure method here :
protected void onMeasure...