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Check if PHP session has already started
... the error message for "session already started". For that I've put these lines:
26 Answers
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Android add placeholder text to EditText
How can I add a placeholder text to EditText in the class that isn't in the XML?
8 Answers
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How do I align views at the bottom of the screen?
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The modern way to do this is to have a ConstraintLayout and constrain the bottom of the view to the bottom of the ConstraintLayout with app:layout_constraintBottom_toBottomOf="parent"
The example below creates a FloatingActionButton that will be aligned to the end and t...
How do you obtain a Drawable object from a resource id in android package?
...display on an image button. Is there a way to use the code below (or something like it) to get an object from the android.R.drawable.* package?
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Database design for audit logging
Every time I need to design a new database I spend quite some time
thinking on how I should set up the database schema to keep an audit log of
the changes.
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How does this CSS produce a circle?
... 0px become a circle with a radius of 180 pixels?
Let's reformulate that into two questions:
Where do width and height actually apply?
Let's have a look at the areas of a typical box (source):
The height and width apply only on content, if the correct box model is being used (no quirks mode, ...
How to verify Facebook access token?
There's only thing that server has to do; just check any access token's validity.
6 Answers
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MySQL, better to insert NULL or empty string?
...ifferent fields. Some of the fields are optional while some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data?
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Sqlite primary key on multiple columns
What is the syntax for specifying a primary key on more than 1 column in SQLITE ?
9 Answers
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Best way to store a key=>value array in JavaScript?
What's the best way to store a key=>value array in javascript, and how can that be looped through?
7 Answers
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