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getting the last item in a javascript object
...most other key-value data structures, so therefore the last item could sometimes be carrot and at other times be banana and so on. If you need to rely on ordering, your best bet is to go with arrays. The power of key-value data structures lies in accessing values by their keys, not in being able to...
UIDevice uniqueIdentifier deprecated - What to do now?
... if a user uninstalls and re-installs the app: you will get a new one each time.
But you might want it to be not unique, i. e. it should stay the same when the user uninstalls and re-installs the app. This requires a bit of effort, since the most reliable per-device-identifier seems to be the MAC a...
Run PHP Task Asynchronously
...voke these PHP functions in the first lines:
ignore_user_abort(true);
set_time_limit(0);
This causes the script to continue running without time limit when the HTTP connection is closed.
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How to get rid of the 'undeclared selector' warning
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@mdorseif Most of the time the warning that you 'have to' exclude is listed in the compile log. You can mute any warning with this concept. Glad you added yours regarding selectors.
– Klaas
Sep 22 '13 at 19:1...
Programmatically Request Access to Contacts
...(bool granted, CFErrorRef error) {
if (granted) {
// First time access has been granted, add the contact
[self _addContactToAddressBook];
} else {
// User denied access
// Display an alert telling user the contact could not be added
}
});...
UITableView load more when scrolling to bottom like Facebook application
... What if user scrolls up and down, so cellForRowAtIndexPath is called MANY TIMES !??
– onmyway133
Mar 19 '14 at 7:38
F...
How can I know which parts in the code are never used?
...icult. Statically it requires whole program analysis, and even though link time optimization may actually remove dead code, in practice the program has been so much transformed at the time it is performed that it is near impossible to convey meaningful information to the user.
There are therefore t...
Unique (non-repeating) random numbers in O(1)?
...o perform N iterations (11 in this example) to get the desired result each time mean it's O(n)? As you need to to do N iterations to get N! combinations from the same initial state, otherwise your output will only be one of N states.
– Seph
Dec 4 '11 at 8:13
...
How does the Google “Did you mean?” Algorithm work?
...ant ( you click in the first links )
This pattern multiplied millions of times, shows what are the most common misspells and what are the most "common" corrections.
This way Google can almost instantaneously, offer spell correction in every language.
Also this means if overnight everyone start ...
How does a “stack overflow” occur and how do you prevent it?
...n calls function C, that then calls function A. It might work most of the time, but just once the wrong input will cause it to go in that circle forever until the computer recognizes that the stack is overblown.
Recursive functions are also a cause for this, but if you're writing recursively (ie, ...