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how to calculate binary search complexity
... The first time value of N would be equal to (L + H), where L is the first index (0) and H is the last index of the list you are searching for. If you are lucky, the element you try to find will be in the middle [eg. You are searching for 18 in the list {16, 17, 18, 19, 20} then you calculate ⌊...
python max function using 'key' and lambda expression
...he object before comparison, or to compare based on a particular attribute/index, you've to use the key argument.
Example 1:
A simple example, suppose you have a list of numbers in string form, but you want to compare those items by their integer value.
>>> lis = ['1', '100', '111', '2'...
Is there a goto statement in Java?
...e) or by extracting a piece of code into a method.
Source: James Gosling, Q&A session
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MenuItemCompat.getActionView always returns null
...o app:actionViewClass
Implementing android.support.v7.widget.SearchView.OnQueryTextListener interface for current activity.
Directly use setOnQueryTextListener instead of SearchViewCompat.setOnQueryTextListener
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = get...
how to show lines in common (reverse diff)?
...
On *nix, you can use comm. The answer to the question is:
comm -1 -2 file1.sorted file2.sorted
# where file1 and file2 are sorted and piped into *.sorted
Here's the full usage of comm:
comm [-1] [-2] [-3 ] file1 file2
-1 Suppress the output column of lines unique t...
how to generate migration to make references polymorphic
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How do you add index to the references column? Do I need to index that?
– mrudult
Apr 20 '14 at 18:20
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How do I use Ruby for shell scripting?
...the name of the current file
Also useful from the stdlib is FileUtils
require 'fileutils' #I know, no underscore is not ruby-like
include FileUtils
# Gives you access (without prepending by 'FileUtils.') to
cd(dir, options)
cd(dir, options) {|dir| .... }
pwd()
mkdir(dir, options)
mkdir(list, opti...
psql: FATAL: database “” does not exist
I'm using the PostgreSql app for mac ( http://postgresapp.com/ ). I've used it in the past on other machines but it's giving me some trouble when installing on my macbook. I've installed the application and I ran:
...
What's the difference between '$(this)' and 'this'?
...e, in .each, the callback function commonly used allows for .each(function(index,element){/*scope*/}). In that scope, this == element is true.
jQuery callbacks use the apply function to bind the function being called with the current element. This element comes from the jQuery object's element arr...
What is the difference between varchar and nvarchar?
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My two cents
Indexes can fail when not using the correct datatypes:
In SQL Server: When you have an index over a VARCHAR column and present it a Unicode String, SQL Server does not make use of the index. The same thing happens when you ...