Optimizations. For the longest time, it was necessary to do this by hand. Now most compilers can do it infinitely better than any human ever could. Note: This is not to say that hand-optimizations aren’t still done, as pointed out in the comments. I’m merely saying that a number of optimizations that used to be … Read more
As I known. The shift command is come from the binary bit shift [1]. for Example. 001100 0 < 011000 // when you shift left | Yay! I think it is quite simple it is just like you push it from behind. So this makes sense for me. The unshift is the opposite way of … Read more
Sorry but right now it really can’t be done.. On iOS 5 there isn’t any access to call_history.db -> Which is exactly what you were looking for. The app mentioned here: http://itunes.apple.com/us/app/callog/id327883585?mt=8 Does not work with iOS 5 (don’t download but check the users’ reviews..) On iOS 4, you might still be able to get … Read more
tl;dr “Foo” and “bar” as metasyntactic variables were popularised by MIT and DEC, the first references are in work on LISP and PDP-1 and Project MAC from 1964 onwards. Many of these people were in MIT’s Tech Model Railroad Club, where we find the first documented use of “foo” in tech circles in 1959 (and … Read more
Something I found: * EAX – Accumulator Register * EBX – Base Register * ECX – Counter Register * EDX – Data Register * ESI – Source Index * EDI – Destination Index * EBP – Base Pointer * ESP – Stack Pointer
YGL’s answer is the right one for log, see this thread: The hint from “hg help log” might be: “If no revision range is specified, the default is tip:0”. Combine this with the knowlegde from “hg help multirevs”. That is: hg log -r : multirevs: When Mercurial accepts more than one revision, they may be … Read more
a.out stands for assembler output. I think that justifies why most compilers have this name as default. More info here.
I just ran into this as well. Its really easy with the jquery address plugin here http://www.asual.com/jquery/address/ The demo for tabs seemed a bit over complicated. I just did this: $(‘document’).ready(function() { // For forward and back $.address.change(function(event){ $(“#tabs”).tabs( “select” , window.location.hash ) }) // when the tab is selected update the url with the … Read more
You have to make sure there is always a history state you’ve pushed from the current page on the history to prevent the back button from performing a page load. If you’re trying to keep the user “contained” in your web app so the back button always provides some kind of function, you need to … Read more
Excerpt from an interview with Ken Thompson (9-6-89): Every time we made a directory, by convention we put it in another directory called directory – directory, which was dd. Its name was dd and that all the users directories and in fact most other directories, users maintain their own directory systems, had pointers back to … Read more