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Difference between Key, Primary Key, Unique Key and Index in MySQL
...x. Adding an index can improve the performance of queries (but it can slow down modifications to the table).
You should use UNIQUE when you want to contrain the values in that column (or columns) to be unique, so that attempts to insert duplicate values result in an error.
A PRIMARY KEY is both a ...
In Java, when should I create a checked exception, and when should it be a runtime exception? [dupli
...ily IOException; that's just an example) wasn't recoverable but was forced down my throat anyway and I am often forced to make the choice between doing the above and polluting my API just to propagate a checked exception all the way to the top where it's (rightlfully) fatal and will be logged.
Ther...
How to redirect all HTTP requests to HTTPS
...t all insecure HTTP requests on my site (e.g. http://www.example.com ) to HTTPS ( https://www.example.com ). I'm using PHP btw. Can I do this in .htaccess?
...
Working with time DURATION, not time of day
...d hit enter/return. Grab the lower right corner of cell B2 and drag as far down as the A column goes to apply the formula to all data in col A.
Last step, be sure to highlight all of column B and set it to Number format (the application of the formula may have automatically set format to Time).
...
How do I split a string with multiple separators in javascript?
...e variety of functions. What looked like 'low overhead' can end up slowing down execution of otherwise optimized code by orders of magnitude.
– Kyle Baker
Jun 24 at 3:23
add a...
Procedure expects parameter which was not supplied
...view tabs] next to the name of the dataset selected, there is another drop down control that lets you change the CommandType. Enjoy!
– SarjanWebDev
Aug 14 '12 at 6:17
2
...
What's the most efficient way to erase duplicates and sort a vector?
...'s talks about the CWUK scenerio that has a nature of propablities to slow down the emplace kind of construction.
– sandthorn
Sep 11 '18 at 19:47
...
What's wrong with Java Date & Time API? [closed]
...rmat is not widely known,
and has been the cause of many hard to
track down threading issues.
As well as the problems with the
classes that Java SE has for datetime,
it has no classes for modelling other
concepts. Non-time-zone dates or
times, durations, periods and
intervals have...
Why does PEP-8 specify a maximum line length of 79 characters? [closed]
...not 100 or 120? Keeping things readable works both ways. Too much up-and-down reading of code is hard to grok too.
– pcorcoran
Sep 18 '08 at 0:39
17
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Fatal Error: Allowed Memory Size of 134217728 Bytes Exhausted (CodeIgniter + XML-RPC)
...st of the RAM and even swapping to disk.
You should probably try to track down the offending code in your code and fix it.
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