Kriya Yoga News Cyberspace Ashram

Kriya Yoga News Cyberspace Ashram

SUMPRODUCT

SUMPRODUCT(array1,array2[,array3,...]) Multiplies the corresponding elements in the specified

arrays and then sums the resulting products

e.g.

dd	bb	Cc
1	1	1
0	2	2
3	5	3
4	8	4
5	5	5
6	6	6
7	7	7
8	8	8
9	9	9
0	10	10

Let’s say we have three ranges dd, bb, cc as shown above in table.

Let say we have following formula

=SUMPRODUCT(--(dd=bb),--(cc))

Let’s walk through row by row

Row 1

=SUMPRODUCT(--(1=1),--(1)) : (1=1) Equals (=) will return 1

=SUMPRODUCT(--(1),--(1)) : 1*1 = 1

Row 2

=SUMPRODUCT(--(0=2),--(1)) : (0=2) Equals (=) will return 0

=SUMPRODUCT(--(0),--(2)) : 0*2 = 0

And so on …

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OCS installation

I have started working on OCS installation. I will keep posting errors and other problem faced by me.

While installing ocs on windows 2008, I was getting strange error.

This was happening when i was adding forntend server to the pool.It was asking for windows media formats which are bundled with the ocs setup. when i tried running wmfdist64.exe under AMD64 folder. i was getting follwoing error
"Not Enough storage is available to process this command"

Strange enough when i installed the Desktop Experience feature which install the windows media player fixed this problem.

sipdetails

User Identity: rajendersaini
Alias: 96110
Domain: opensips.org

Best coding practices

Over the many years of my programming experience. I have found common mistakes which people make again and again. In this series of articles I will post some of best practices one by one and common mistake which you will avoid by using it.

1) Read the API documentation carefully.

It is very common that programmer does not read API documentation carefully. Which include what are parameter boundaries. What are side effect of passing certain parameters.
Under what condition function will fail. What are error code or exceptions thrown by the api. If programmer take 10 min of extra time and reread the documentation once again carefully. I can bet many of programming errors can be avoided.
2) There should be very good logging mechanism in place.
While developing any piece of software there should be very good logging in place. Log statement should be well thought. These should give comprehensive description about the event. I have seen logger statement like enter the function exit the function. these are really of no value. There should be different log levels which should be configurable. In case of failure log should give clear picture why the failure has happened.
3) Write simple code
We should write as simple code as possible. We should avoid complex code. One hint for complex code could be, if one has to write comments to make the code understandable it is time to review the lines of code you have written. See if you can make these lines simpler.
4) Use standard libraries and api's :-
Many programmer keep inventing same thing again and again. e.g function to reverse a strings etc. There many standard functions for many tasks like this. Read all the standard api's and try to use already tested and used api's

Plasama vs LCD

Here is quick comparison

S.NO	Plasma	LCD
1.Life	15years	20 years
2.Picture quality	Best as good as CRT	Blur
3.Power	More	less
4.Moving picture	Best	Blur
5.Weight	More	less
6.Heat	More	Less
7.Still picture	Create pixel burns	Good
8.Moving picture	Good	Create ghosts