Difference between Fork/Join and Map/Reduce
What is the key difference between Fork/Join and Map/Reduce? Do they differ in the kind of decomposition and distribution (data vs. computation)? ...
difference
Array Problem, need to sort via Keys
Ok, not really sure how to do this. I have values that are being outputted from a SQL query like so: $row[0] = array('lid' => 1, 'llayout' => 1, 'lposition' => 1, 'mid' => 1, 'mlayout' => 1, 'mposition' => 0); $row[1] = array('lid' => 2, 'llayout' => 1, 'lposition' => 0, 'mid' => 2, 'mlayout' => 1, 'mposition' => 0); $row[2] = array('l...
Compare images to find differences
Task: I have a camera mounted on the end of our assembly line, which captures images of produced items. Let's for example say, that we produce tickets (with some text and pictures on them). So every produced ticket is photographed and saved to disk as image. Now I would like to check these saved images for anomalies (i.e. compare them to...
RSpec: in-depth differences between before(:all) and before(:each)
Ok, so I've ran into a very strange issue, directly connected with before blocks. I'm doing a integration testing via Watir and RSpec. For a simple test to check if user can perform a login I'm creating a 'user' record in the db by means of factory_girl. So I put the following code: before(:each) do @user = Factory(:user) end if "s...
What are the main differences between Jetbrains' MPS and Eclipse Xtext?
I have used Eclipse Xtext in several projects. I loved the ease of defining a grammar over an Ecore (meta)model and letting everything generated for you including awesome Eclipse plugin editor, but I was quite uncomfortable with the underlying EMF framework with everything hard-wired in static fields. Lately I came across Jetbrains' MPS...
Differences between testing JavaScript and testing Ajax ?
hi all, i was wondering if there is any difference between performing tests on JavaScript, or Ajax? I understand that JavaScript is part of the Ajax equation, but is there any forms of execution differences when i am performing tests for JavaScript or JavaScript which is used to enable AJAX? Best Regards. ...
pixel difference
i m a beginner in java programming. i have to submit project of server- client and stuck in pixel comparision .acc to code it accepts buffered image and compares pixel how to store pixel difference in 2nd image itself and return it?? do help with code? ...
In php find first date and last date in a month
Whether anyway to find first date and last date in a month. Suppose have the date today as 21-04-2010, i want to find the first and last date of this month in php. I did this in mysql, but i need in php. Any one can help, Thanks in advance. ...
Find Month difference in php?
Is there anyway to find the month difference in php? I have the input of from date 2003-10-17 and todate 2004-03-24. I need the results how many month is there within these two days. Say if 6 months, i need the output in months only. Thanks for guide me for day difference. I find the solution through mysql but i need in php. Anyone hel...
JScript: How to calculate difference between two date-times?
How can I calculate time difference in JScript between two times in milliseconds or seconds? For example, between 2010-04-23 15:03 and 2010-05-30 00:41 ...
What is the difference between "UIAccelerometer" and "CLLocationManager"?
What is the difference between "UIAccelerometer" and "CLLocationManager"? Both give me x, y and z axis as result. UIAccelerometer X -18.000 Y -03.500 Z -41.000 CLLocationManager X -0.036 Y -0.002 Z -1.069 Is this information from the same sensors with different formatting? Or are there "real" differences? Thanks! ...
Determine if it has been 6 months since birthday in c#
Hi, Sorry if this is a duplicate, but i think I've seen enough of Google for one day! My application needs to adjust a clients current age by +0.5 if it has been 6 months since their last birthday. The code should look something like this, but how many ticks would there be in 6 months? if (DateTime.Today - dateOfBirth.Date > new Time...
Practical differences between classes and structs in .net (not conceptual)?
Whenever I tried to search about differences between classes and structs in C# or .net, I ended up with the conceptual overview of the two things like value type or the reference type, where the variables are allocated etc. But I need some practical differences. I have found some like different behavior of assignment operator, having con...
Algorithm to find added/removed elements in an array
I am looking for the most efficent way of solving the following Problem: given an array Before = { 8, 7, 2, 1} and an array After ={1, 3, 8, 8} find the added and the removed elements the solution is: added = 3, 8 removed = 7, 2 My idea so far is: for i = 0 .. B.Lenghtt-1 { for j= 0 .. A.Lenght-1 { ...
In java, what is the difference between a HashSet and HashMap....?
Apart from the fact that hashSet does not allow duplicate values, what is the difference between a HashMap and Hashset...? I mean implementaion wise.....? It's a little bit vague because both use hash table to store values..... ...
How to differentiate "Note" and "Mail" item in Lotus notes? Using Domino.dll
Hi, I have a Nsf file in which in one of folder there are some mail and notes items. I am differentiating each item with "form" property. In case of mails form type is "memo" but in above scenario Notes "form" type is again "memo" How can i differentiate these two items? thanx ...
difference equations in MATLAB - why the need to switch signs?
Perhaps this is more of a math question than a MATLAB one, not really sure. I'm using MATLAB to compute an economic model - the New Hybrid ISLM model - and there's a confusing step where the author switches the sign of the solution. First, the author declares symbolic variables and sets up a system of difference equations. Note that the...
Thread vs async execution. What's different?
I believed any kind of asynchronous execution makes a thread in invisible area. But if so, Async codes does not offer any performance gain than threaded codes. But I can't understand why so many developers are making many features async form. Could you explain about difference and cost of them? ...
how is FLUENT api different from other API
i have come across fluent api while studying DSLs. i have searched alot on FLUENT API..the basic conclusion which i could draw out was that fluent api uses method chaining in order to make the code fluent. but i cannot understand that in object oriented languages we can always create an object and can call the methods related to it. then...
SQL Server compare table entries for update
I have a trade table with several million rows. Each row represents the version of a trade. If I'm given a possibly new trade I compare it to the latest version in the trade table. If it has changed I add a new version, otherwise I do nothing. In order to compare the 2 trades I read the version from the trade table into my application. ...