Note: Since I am well past my initial goal of reverse engineering the Open Trivia DB, creating a new DB, creating a basic PHP API, creating a feature to add new entries to the DB, and have added over 150 computer science related trivia entries in the DB, I will stop posting in this thread soon and start a new phase for this project sooner than later.
Hello guys!
Can say me anybody about operatios with unix, I don't to make operations, only inside in a variable, like this
#y=4
#x=2
#let z=$y-$x
#echo $z
# 2
but I can't to make mathematical operations with decimal like this
#y=3.2
#x=1.5
#let z=$y-$x
#echo $z
# 3
this... (2 Replies)
Hello all!
I used to use expr for doing simple mathematics, but has a main advantage and a main disadvantage:
The advantage is that it can take variables for numbers
(e.g.{1}: echo "Give me first"
read lol
echo "Give other"
read lil
sum=`expr $lol + $lil`
echo "The sum of $lol and $lil =... (5 Replies)
Hi,
I haven't posted on the forums for a while now, I tried to find the most appropriate section for this post, but if this is in the wrong section please forgive me.
First, let me say I'm a sophomore in HS. I know that job wise I definitely want to do something in computers. A while ago I was... (5 Replies)
I am now a student in university in 2nd year. I am studying computer science. But I am not sure what type of jobs computer science provide. I know some of them are software programming or network management. Recently, I hear some about Web Development. I wonder if it is a part of computer science.... (1 Reply)
I am now a student in university in 2nd year. I am studying computer science. But I am not sure what type of jobs computer science provide. I know some of them are software programming or network management. Recently, I hear some about Web Development. I wonder if it is a part of computer... (3 Replies)
The UNIX and Linux Forums now has over 1000 TRUE / FALSE computer science and computer related trivia question in our database. These questions are of relatively high quality (compared to similar sites on the web) and are fun (according to feedback by users). In the first week during the... (1 Reply)
Thanks to Akshay, who helped me write the core MySQL queries, we now have two new draft leaderboards, by (1) member and by (2) country:
https://www.unix.com/trivia_stats.php
Currently milhan leads the members with a high score of 90%:
... (3 Replies)
Only a few days after I coded this new feature from scratch, we are seeing over 3000 entries in the database from members (mostly guests) playing CS trivia.
I have spend a lot of time coding this (from scratch) and testing the API. From the logs, it seems to have an API bug which appears... (31 Replies)
Just noticed that our successful computer trivia feature (stats here) has surpassed over 50,000 questions answered by users:
https://www.unix.com/trivia_stats.php
This was a coding effort worth while and I'm pleased to see so many people enjoying it in such a short time since it was released... (3 Replies)
Discussion started by: Neo
3 Replies
LEARN ABOUT PHP
dio_seek
DIO_SEEK(3) 1 DIO_SEEK(3)dio_seek - Seeks to pos on fd from whenceSYNOPSIS
int dio_seek (resource $fd, int $pos, [int $whence = SEEK_SET])
DESCRIPTION
The function dio_seek(3) is used to change the file position of the given file descriptor.
PARAMETERS
o $fd
- The file descriptor returned by dio_open(3).
o $pos
- The new position.
o $whence
- Specifies how the position $pos should be interpreted:
o SEEK_SET (default) - specifies that $pos is specified from the beginning of the file.
o SEEK_CUR - Specifies that $pos is a count of characters from the current file position. This count may be positive or nega-
tive.
o SEEK_END - Specifies that $pos is a count of characters from the end of the file. A negative count specifies a position
within the current extent of the file; a positive count specifies a position past the current end. If you set the position
past the current end, and actually write data, you will extend the file with zeros up to that position.
RETURN VALUES EXAMPLES
Example #1
Positioning in a file
<?php
$fd = dio_open('/dev/ttyS0', O_RDWR);
dio_seek($fd, 10, SEEK_SET);
// position is now at 10 characters from the start of the file
dio_seek($fd, -2, SEEK_CUR);
// position is now at 8 characters from the start of the file
dio_seek($fd, -5, SEEK_END);
// position is now at 5 characters from the end of the file
dio_seek($fd, 10, SEEK_END);
// position is now at 10 characters past the end of the file.
// The 10 characters between the end of the file and the current
// position are filled with zeros.
dio_close($fd);
?>
PHP Documentation Group DIO_SEEK(3)