Sponsored Content
Top Forums UNIX for Beginners Questions & Answers Are the brains of the UNIXoid working correctly? Post 303031449 by Corona688 on Thursday 28th of February 2019 11:28:34 AM
Old 02-28-2019
OpenSCAD is another purely functional language, though it doesn't look it at first. It looks more like C, with very different constraints on where you're allowed to do what. This causes a bit of brain damage at first ("why can't I overwrite variables!?" cried a million voices) but is good at illustrating what "functional language" means in a paradigm procedural programmers can understand. It's also got a nice orthogonal set of basic vector/matrix operations.

Having fought through and learned its ways, I agree that functional syntax is often simpler and more concise. It's rarely clearer -- comments are essential. And never in my experience have they ever been faster or smaller. Functional languages rely on things like compiler optimization and caching to reduce the amount of work for a given result. This amounts to big compilers/interpreters and occasionally unpredictable amounts of overhead. Tail recursion is a wondrous thing but so easy to poison!

That's the price you pay for a language one step closer to declaring what you want instead of declaring exactly how to do it. It's not a good fit for everything.
These 2 Users Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Script not working correctly

I have a simple script that I want to run every 30 minutes but only when I execute it. I don't want it to be a crontab job. so i have for example date ls -l who sleep 1800 The first time it executes correctly but after the first time it nevers execute back again. It should execute after... (2 Replies)
Discussion started by: elchalateco
2 Replies

2. Shell Programming and Scripting

if not working correctly

Anyone have an idea why this if statement does not work correctly? "test2.sh" 18 lines, 386 characters #!/usr/bin/sh WARNING=80 CRITICAL=95 check_it() { if ] || ];then echo "YES ] || ]" else echo "NO ] || ]" fi } check_it 80.1 check_it 81.1 (3 Replies)
Discussion started by: 2dumb
3 Replies

3. Shell Programming and Scripting

Variable not working correctly.

Hi, I have a script where I am trying to set a local variable using the following, MYVAR="$NAME"_"$NAME2".txt where say, NAME = one NAME2 = two so I want the output one_two.txt but what I am getting is, two.txt basically the $NAME2 is overwriting, what am I doing wrong? ... (3 Replies)
Discussion started by: walsh_j
3 Replies

4. Programming

Shell Implementation not working correctly

//save in/out int tmpin = dup(0); int tmpout = dup(1); //set initial input int fdin; if(_inputFile) { fdin = open(_inputFile, O_RDONLY | O_CREAT, S_IREAD | S_IWRITE); } else { //use default input fdin = dup(tmpin); } int ret; int fdout; for(int i = 0; i... (14 Replies)
Discussion started by: AirBronto
14 Replies

5. UNIX for Dummies Questions & Answers

grep -A switch not working correctly with -m

egrep -A 7 -m 2 -h 'Date:|Time:' *.html this is showing only 2 line after the context of the 2nd found match. Is this a bug in grep? egrep -A 7 -m 2 -h 'Time:' *.html - this works correctly (2 Replies)
Discussion started by: zer0
2 Replies

6. Shell Programming and Scripting

Find cmd not working correctly in script

I am trying to copy 2 types of files so I can archive them. I tested with a set of commands: touch -t $(date -d "-60 day" +%Y%m%d) WORKDIR/REF find TARGETDIR/ -type f -maxdepth 1 -iname \*.out\* -or -iname \*.log\* ! -newer WORKDIR/REF -exec ls -l {} \; This correctly lists any files in the... (2 Replies)
Discussion started by: prismtx
2 Replies

7. Shell Programming and Scripting

rsync is not correctly working

We are using Red Hat linux system. I am transferring my rman backup files to another server. Here is the command i am using to transfer the files. /usr/bin/rsync -avpP --delete /xyz/xyz/ 99.99.999.99::db110bkp Here is the rsync version. >rsync --version rsync version 3.0.6 ... (1 Reply)
Discussion started by: govindts
1 Replies

8. UNIX for Dummies Questions & Answers

Grep Regexp not working correctly

Consider the following code: grep -o -e '^STEAM_::\d+$' workfile3.tmp A sample format of a valid string for the regexp would be: STEAM_0:1:12345678 Here is an example line from the workfile3.tmp file: 465:L 01/02/2012 - 00:05:33: "Spartan1-1-7<8><STEAM_0:1:47539638><>" connected No... (2 Replies)
Discussion started by: spinner0205
2 Replies

9. Shell Programming and Scripting

awk not working correctly

Hi I am attempting to right a script which will read a table and extract specfic information. LASTFAILEDJOB=/usr/openv/netbackup/scripts/GB-LDN/Junaid/temp_files/lastfailedjob cat /usr/openv/netbackup/scripts/GB-LDN/Junaid/temp_files/lastfailedjob 237308646 If i run the following... (5 Replies)
Discussion started by: Junes
5 Replies

10. UNIX for Dummies Questions & Answers

vnc No Longer Working Correctly

Hello All, Yesterday, all day, I was using x11vnc and vncviewer to connect to a server. But today for some reason it is not working. I don't remember changing any settings or anything like that, but because it stopped working correctly I guess something has...? I'm issuing the exact same... (0 Replies)
Discussion started by: mrm5102
0 Replies
fgetpos64(3S)															     fgetpos64(3S)

NAME
fgetpos64(), fopen64(), freopen64(), fseeko64(), fsetpos64(), fstatvfsdev64(), ftello64(), ftw64(), nftw64(), statvfsdev64(), tmpfile64() - non-POSIX standard API interfaces to support large files. SYNOPSIS
DESCRIPTION
New API's to support large files. These API interfaces are not a part of the POSIX standard and may be removed in the future. The function is identical to except that returns the position in a instead of a All other functional behaviors, returns, and errors are identical. The function is identical to in 64-bit compile environment. The function returns a pointer to a FILE which can be used to grow the file past 2 GB if desired. All other functional behaviors, returns, and errors are identical to The function is identical to in 64-bit compile environment. The function returns a pointer to a FILE which can be used to grow the file past 2 GB if desired. All other functional behaviors, returns, and errors are identical to The function is identical to except that accepts an for the size parameter instead of All other functional behaviors, returns, and errors are identical. The function is identical to except that accepts an for the pos parameter instead of All other functional behaviors, returns, and errors are identical. The function is identical to except that accepts a for the second parameter instead of All other functional behaviors, returns, and errors are identical. The function is identical to except that returns the file position in an instead of an All other functional behaviors, returns, and errors are identical. The function is identical to except that it that it utilizes a as the second parameter to the function whose pointer is passed to All other functional behaviors, returns, and errors are identical. The function is identical to except that it that it utilizes a as the second parameter to the function whose pointer is passed to All other functional behaviors, returns, and errors are identical. The function is identical to except that accepts a for the second parameter instead of All other functional behaviors, returns, and errors are identical. The function is identical to in the 64-bit compile environment. Both interfaces create a temporary file that is capable of growing beyond 2GB's if desired. All other functional behaviors, returns, and errors are identical. SEE ALSO
thread_safety(5). fgetpos64(3S)
All times are GMT -4. The time now is 02:01 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy