10-22-2008
compare data line by line from a file
Hi there
How can I compare data line by line from a file?
I need to compare the second value with the fourth to know if they are different.
If those values are different, I require to send my first value to the output until the complete file has been read.
This is my file:
0 FALSE 0.9402448762310354 TRUE
1 FALSE 0.9402448762310354 FALSE
2 FALSE 0.9402448762310354 FALSE
4 FALSE 0.9402448762310354 FALSE
10 FALSE 0.9402448762310354 FALSE
828 FALSE 0.9402448762310354 TRUE
829 FALSE 0.9402448762310354 TRUE
832 FALSE 0.9402448762310354 TRUE
833 FALSE 0.9402448762310354 TRUE
834 FALSE 0.9402448762310354 TRUE
Your help will be highly appreciated
Thanks
Lu
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LEARN ABOUT PHP
variant_and
VARIANT_AND(3) 1 VARIANT_AND(3)
variant_and - Performs a bitwise AND operation between two variants
SYNOPSIS
mixed variant_and (mixed $left, mixed $right)
DESCRIPTION
Performs a bitwise AND operation. Note that this is slightly different from a regular AND operation.
PARAMETERS
o $left
- The left operand.
o $right
- The right operand.
Note
As with all the variant arithmetic functions, the parameters for this function can be either a PHP native type (integer, string,
floating point, boolean or NULL), or an instance of a COM, VARIANT or DOTNET class. PHP native types will be converted to variants
using the same rules as found in the constructor for the "VARIANT" class. COM and DOTNET objects will have the value of their
default property taken and used as the variant value.
The variant arithmetic functions are wrappers around the similarly named functions in the COM library; for more information on
these functions, consult the MSDN library. The PHP functions are named slightly differently; for example variant_add(3) in PHP cor-
responds to VarAdd() in the MSDN documentation.
RETURN VALUES
Variant AND Rules
+------------+--------------------+---+
|If $left is | | |
| | | |
| | If $right is | |
| | | |
| | then the result is | |
| | | |
+------------+--------------------+---+
| | | |
| TRUE | | |
| | | |
| | | |
| | TRUE | |
| | | |
| | | |
| | TRUE | |
| | | |
| | | |
| TRUE | | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| TRUE | | |
| | | |
| | | |
| | NULL | |
| | | |
| | | |
| | NULL | |
| | | |
| | | |
| FALSE | | |
| | | |
| | | |
| | TRUE | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| FALSE | | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| FALSE | | |
| | | |
| | | |
| | NULL | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| NULL | | |
| | | |
| | | |
| | TRUE | |
| | | |
| | | |
| | NULL | |
| | | |
| | | |
| NULL | | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| | FALSE | |
| | | |
| | | |
| NULL | | |
| | | |
| | | |
| | NULL | |
| | | |
| | | |
| | NULL | |
| | | |
+------------+--------------------+---+
SEE ALSO
variant_or(3).
PHP Documentation Group VARIANT_AND(3)