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Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...ed the alias and allowed the branch to be predicted correctly
Your Core2 doesn't keep a separate history record for each conditional jump. Instead it keeps a shared history of all conditional jumps. One disadvantage of global branch prediction is that the history is diluted by irrelevant informat...
Querying data by joining two tables in two database on different servers
...erent servers, I need to join them so as to make few queries. What options do I have? What should I do?
11 Answers
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Android EditText delete(backspace) key event
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NOTE: onKeyListener doesn't work for soft keyboards.
You can set OnKeyListener for you editText so you can detect any key press
EDIT: A common mistake we are checking KeyEvent.KEYCODE_BACK for backspace, but really it is KeyEvent.KEYCODE_DEL (R...
Rake just one migration
...to run just one migration out of a whole bunch in my rails app. How can I do this? I don't want to run any of the migrations before or after it. Thanks.
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'Must Override a Superclass Method' Errors after importing a project into Eclipse
...y case, I had not installed JDK 1.6, only the latest 1.7, which apparently doesn't work with Android. Installing the older 1.6 and then following these instructions, should work :)
– NoBugs
Jul 22 '12 at 2:31
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Difference between e.target and e.currentTarget
I don't understand the difference, they both seem the same but I guess they are not.
10 Answers
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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
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doesn't work, just tried "select '2010-01-01 12:00:00'::timestamp::date;" . it returns just year 2011. i had already tried date(timestamp) and (timestamp)::date but i only get the year part in return not the full date that ...
Virtual/pure virtual explained
What exactly does it mean if a function is defined as virtual and is that the same as pure virtual?
12 Answers
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What is JSONP, and why was it created?
I understand JSON, but not JSONP. Wikipedia's document on JSON is (was) the top search result for JSONP. It says this:
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MIT vs GPL license [closed]
... that the chief difference between the MIT license and GPL is that the MIT doesn't require modifications be open sourced whereas the GPL does.
True - in general. You don't have to open-source your changes if you're using GPL. You could modify it and use it for your own purpose as long as you're no...