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Array versus linked-list
...t's easier for a linked list to grow organically. An array's size needs to be known ahead of time, or re-created when it needs to grow.
Shuffling a linked list is just a matter of changing what points to what. Shuffling an array is more complicated and/or takes more memory.
As long as your iterati...
How to iterate a loop with index and element in Swift
Is there a function that I can use to iterate over an array and have both index and element, like Python's enumerate ?
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Removing duplicates in lists
...w list with the items that weren't duplicated/removed. This is what I have but to be honest I do not know what to do.
50 An...
get all keys set in memcached
... your server:
telnet 127.0.0.1 11211
Next, list the items to get the slab ids:
stats items
STAT items:3:number 1
STAT items:3:age 498
STAT items:22:number 1
STAT items:22:age 498
END
The first number after ‘items’ is the slab id. Request a cache dump for each slab id, with a limit for the...
Why does the MongoDB Java driver use a random number generator in a conditional?
I saw the following code in this commit for MongoDB's Java Connection driver , and it appears at first to be a joke of some sort. What does the following code do?
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Convert a string representation of a hex dump to a byte array using Java?
... to convert a long string (from a dump), that represents hex values into a byte array.
24 Answers
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How do you know when to use fold-left and when to use fold-right?
...t produces left-leaning trees and fold-right produces right-leaning trees, but when I reach for a fold, I sometimes find myself getting bogged down in headache-inducing thought trying to determine which kind of fold is appropriate. I usually end up unwinding the entire problem and stepping through ...
How to check if activity is in foreground or in visible background?
I have a splash screen on a timer. My problem is that before I finish() my activity I need to check that the next activity has started because a system dialogue box pops-up and I only want to finish() ; once the user has selected an option from the dialogue box?
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What's the best way to retry an AJAX request on failure using jQuery?
...swered Apr 5 '12 at 7:44
Sudhir BastakotiSudhir Bastakoti
92.1k1414 gold badges136136 silver badges145145 bronze badges
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What is an index in SQL?
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An index is used to speed up searching in the database. MySQL have some good documentation on the subject (which is relevant for other SQL servers as well):
http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html
An index can be used to efficiently find all rows matching ...