# Thread: Need Help In Writing A Specific Randomizing Function

1. Registered User
Join Date
Jan 2007
Posts
6

## Need Help In Writing A Specific Randomizing Function

Hi all.

I'm new to javascript. I learned C several years ago but haven't actually programmed anything for a long time.

I'm trying to create a function that will output an array of 12 strings in:
1)Random order
2)no repating numbers
3)sequential numbers

for example, these two are bad outputs for me:
"1, 2, 7, 3" etc. and also "1,5,8,1" etc.

Hope I'm clear enough. I tried using some info on the site, but couldn't find something that combines both "restrictions" and I wasn't able to fill the holes myself.

2. Registered User
Join Date
Mar 2009
Posts
590
1. create a function that generates one of your four numbered units as an array
2. create a function that checks for consecutive numbers in the array--returns true if so
3. create a function that checks for repeats in the array --returns true if so
4. create a function that turns the array into a string
declare an array to hold your strings-- we'll call it ARR

create a while loop that will loop until 12 strings have been found--like
ARR = [];
var tmp;
while(ARR.length < 12){

tmp = fnc1(); //got random array
if(fnc2(tmp)){continue;} // if it was no good--try again--go to the beginning of the loop
if(fnc3(tmp)){continue;} // same as above
//if it gets here, its good
tmp = fnc(4) //convert to a string
//now check to make sure its not a duplicate
if(ARR.indexOf(tmp) == -1){
ARR.push(tmp);
}
}

There's the logic for you. Now write the functions for your homework yourself.

There are currently 1 users browsing this thread. (0 members and 1 guests)

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•

"

"

## X vBulletin 4.2.2 Debug Information

• Page Generation 0.14341 seconds
• Memory Usage 2,831KB
• Queries Executed 13 (?)
Template Usage (32):
• (1)footer
• (1)forumjump
• (1)forumrules
• (1)gobutton
• (2)memberaction_dropdown
• (1)navbar
• (1)navbar_moderation
• (1)navbar_noticebit
• (1)navbar_tabs
• (2)option
• (2)postbit
• (2)postbit_onlinestatus
• (2)postbit_wrapper
• (1)spacer_close
• (1)spacer_open
• (1)tagbit_wrapper

Phrase Groups Available (6):
• global
• inlinemod
• postbit
• posting
• reputationlevel
Included Files (26):
• ./global.php
• ./includes/class_bootstrap.php
• ./includes/init.php
• ./includes/class_core.php
• ./includes/config.php
• ./includes/functions.php
• ./includes/class_friendly_url.php
• ./includes/class_hook.php
• ./includes/class_bootstrap_framework.php
• ./vb/vb.php
• ./vb/phrase.php
• ./includes/functions_calendar.php
• ./includes/functions_bigthree.php
• ./includes/class_postbit.php
• ./includes/class_bbcode.php
• ./includes/functions_reputation.php
• ./includes/functions_notice.php
• ./packages/vbattach/attach.php
• ./vb/types.php
• ./vb/cache.php
• ./vb/cache/db.php
• ./vb/cache/observer/db.php
• ./vb/cache/observer.php

Hooks Called (70):
• init_startup
• friendlyurl_resolve_class
• init_startup_session_setup_start
• database_pre_fetch_array
• database_post_fetch_array
• init_startup_session_setup_complete
• global_bootstrap_init_start
• global_bootstrap_init_complete
• cache_permissions
• fetch_foruminfo
• global_state_check
• global_bootstrap_complete
• global_start
• style_fetch
• global_setup_complete
• strip_bbcode
• friendlyurl_clean_fragment
• friendlyurl_geturl
• forumjump
• cache_templates
• cache_templates_process
• template_register_var
• template_render_output
• fetch_template_start
• fetch_template_complete
• parse_templates
• notices_check_start
• notices_noticebit
• process_templates_complete
• friendlyurl_redirect_canonical
• bbcode_fetch_tags
• bbcode_create
• postbit_factory
• postbit_display_start
• postbit_imicons
• bbcode_parse_start
• bbcode_parse_complete_precache
• bbcode_parse_complete
• postbit_display_complete
• memberaction_dropdown
• tag_fetchbit_complete
• forumrules
• navbits
• navbits_complete