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How do I check if a column is empty or null in MySQL?
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the NULLIF checks fieldname for the empty value and would convert to NULL if it was empty. The ISNULL returns 1 (true) if the NULLIF succesfully changed an empty field to NULL or if it was already NULL.... try for your self on a null and empty field in a table with the two funct...
Block Declaration Syntax List
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I've converted this into Markdown for use with a viewer for printing. Handy! gist.github.com/swizzlr/6268955
– Swizzlr
Aug 19 '13 at 13:13
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Serialize form data to JSON [duplicate]
...ame. You should check if indexed_array[n['name']] already exists and if it convert it to array and add the n['value'] there. Of course you also need to check if indexed_array[n['name']] is already an array.
– Strix
May 22 '13 at 22:13
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Python speed testing - Time Difference - milliseconds
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Anyone interested in getting total minutes can use int(c.total_seconds() / 60) in this case
– sufinawaz
Feb 6 '15 at 15:41
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What's the scope of a variable initialized in an if statement?
...o count, as do lambda expressions. You can't stuff an assignment statement into any of those, but lambda parameters and for clause targets are implicit assignment.)
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ipad safari: disable scrolling, and bounce effect?
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I know this is slightly off-piste but I've been using Swiffy to convert Flash into an interactive HTML5 game and came across the same scrolling issue but found no solutions that worked.
The problem I had was that the Swiffy stage was taking up the whole screen, so as soon as it had loade...
Do you (really) write exception safe code? [closed]
...r example, a new can throw an exception, but assigning a built-in (e.g. an int, or a pointer) won't fail. A swap will never fail (don't ever write a throwing swap), a std::list::push_back can throw...
Exception guarantee
The first thing to understand is that you must be able to evaluate the exceptio...
✔ Checkmark selected row in UITableViewCell
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I found that reloading the data interrupts the deselect animation in an ugly way.
This Swift implementation cleanly adds/removes checkmarks and deselects the row:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
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How would you go about parsing Markdown? [closed]
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interesting. perhaps I will try converting that as an f# project
– ShuggyCoUk
Feb 11 '10 at 13:51
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Iterate over each line in a string in PHP
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I'm not sure if the ascii carriage return gets converted to \r once it's placed inside a variable. If not you can always use a split()/exlope() with the ascii value instead -- ch(13)
– Kyril
Sep 22 '09 at 21:52
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