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Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities

...given in the question, here is a small list - O(1) time Accessing Array Index (int a = ARR[5];) Inserting a node in Linked List Pushing and Poping on Stack Insertion and Removal from Queue Finding out the parent or left/right child of a node in a tree stored in Array Jumping to Next/Previous elem...
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Should each and every table have a primary key?

...s, most RDBMS engines will benefit from including these fields in a unique index. And since any primary key involves creating a unique index, you should declare it and get both logical consistency and performance. See this article in my blog for why you should always create a unique index on uniqu...
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How to print a dictionary's key?

...:"yes", 'Y':"no", 'Z':"ok"} # To print a specific key (for example key at index 1) print([key for key in x.keys()][1]) # To print a specific value (for example value at index 1) print([value for value in x.values()][1]) # To print a pair of a key with its value (for example pair at index 2) print...
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How to remove globally a package from Composer?

I ran this command to install globally PHPUnit : 2 Answers 2 ...
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How do I iterate through children elements of a div using jQuery?

... @SouvikGhosh: the index is passed as the first argument to the callback function for each(). Check the docs, linked in the answer above. – Andy E Sep 22 '16 at 8:33 ...
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jQuery .each() index?

... $('#list option').each(function(index){ //do stuff console.log(index); }); logs the index :) a more detailed example is below. function run_each() { var $results = $(".results"); $results.empty(); $results.append("==============...
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Git undo changes in some files [duplicate]

...th the changes to the file A. If you have not yet added the changes to the index or committed them, then you just want to use the checkout command - this will change the state of the working copy to match the repository: git checkout A If you added it to the index already, use reset: git reset A...
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Best way to remove from NSMutableArray while iterating?

...re more than once in an array. As an alternative you could use an NSMutableIndexSet and -(void)removeObjectsAtIndexes. – Georg Schölly Jun 19 '09 at 20:47 1 ...
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Access-Control-Allow-Origin wildcard subdomains, ports and protocols

I'm trying to enable CORS for all subdomains, ports and protocol. 11 Answers 11 ...
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Access lapply index names inside FUN

Is there a way to get the list index name in my lapply() function? 12 Answers 12 ...