# \[APP\]\[Pro\] Better Logic Library - Just some better logic, variable and library management **URL:** \ **Category:** Apps\ **Tags:** app, tools, homey-pro, bll\ **Created:** [December 16, 2018, 10:29pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568 "2018-12-16T22:29:57Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![SailingDuck](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sailingduck/32/2988_2.png) [@SailingDuck](https://community.homey.app/u/SailingDuck)\ **Post date:** [January 29, 2019, 6:56am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/41 "2019-01-29T06:56:07Z")
You need to type the variable names. Using the tags it gives the values of the tags so I dont know which ones have changed. ---
**Author:** ![MartijnT](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/martijnt/32/12800_2.png) [@MartijnT](https://community.homey.app/u/MartijnT)\ **Post date:** [January 29, 2019, 5:51pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/42 "2019-01-29T17:51:58Z")
Thanks. Problem solved. Typing the variables was the solution. Call me stupid đŸ€Ș ---
**Author:** ![SailingDuck](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sailingduck/32/2988_2.png) [@SailingDuck](https://community.homey.app/u/SailingDuck)\ **Post date:** [February 9, 2019, 1:29pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/43 "2019-02-09T13:29:16Z")
I added a hint in the latest version (1.0.4) that tags will not work 🙂 ---
**Author:** ![Bob\_Mijwaard](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/bob_mijwaard/32/11736_2.png) [@Bob\_Mijwaard](https://community.homey.app/u/Bob_Mijwaard)\ **Post date:** [March 6, 2019, 11:14am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/45 "2019-03-06T11:14:42Z")
Would it be possible to move the “delete all” button. This button is placed directly under the “add variable” button and on a phone the delete button is touched easily. Instead of adding you will delete all variables. ---
**Author:** ![Osorkon](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/osorkon/32/43026_2.png) [@Osorkon](https://community.homey.app/u/Osorkon)\ **Post date:** [March 26, 2019, 3:16pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/46 "2019-03-26T15:16:34Z")
Which mathematical operators can be used? Are this only +,-,/,\*? Or can logarithm and exponentiation functions also be used? ---
**Author:** ![viix](https://avatars.discourse-cdn.com/v4/letter/v/4af34b/32.png) [@viix](https://community.homey.app/u/viix)\ **Post date:** [March 27, 2019, 9:45am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/48 "2019-03-27T09:45:17Z")
any [mathjs](https://mathjs.org/) operators will work ---
**Author:** ![Rrrr](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rrrr/32/629_2.png) [@Rrrr](https://community.homey.app/u/Rrrr)\ **Post date:** [May 28, 2019, 3:39pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/49 "2019-05-28T15:39:29Z")
Just note something may have changed: I had to use {{ and }} around the expression in the “Set a variable” card. {{round(Total/60/60,0)}} ---
**Author:** ![cmd](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/cmd/32/8427_2.png) [@cmd](https://community.homey.app/u/cmd)\ **Post date:** [June 25, 2019, 6:28am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/50 "2019-06-25T06:28:14Z")
Hello! First love this system, works very well. I do have an issue I havent solved which is rounding to a half number. For example I want 22.3 to be rounded to 22.5 instead of 22 or 23. Tried some different methods but this mathjs dosent seem to support things like ceiling/ceil(number, 0.5), round10, ceil10 etc. Is this possible today? ---
**Author:** ![Ton\_Meek](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ton_meek/32/149_2.png) [@Ton\_Meek](https://community.homey.app/u/Ton_Meek)\ **Post date:** [June 25, 2019, 3:43pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/51 "2019-06-25T15:43:06Z")
Try round(x\*2)/2 ---
**Author:** ![cmd](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/cmd/32/8427_2.png) [@cmd](https://community.homey.app/u/cmd)\ **Post date:** [June 27, 2019, 4:42am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/52 "2019-06-27T04:42:41Z")
Thank you, worked ---
**Author:** ![jolerius](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jolerius/32/7907_2.png) [@jolerius](https://community.homey.app/u/jolerius)\ **Post date:** [August 4, 2019, 8:10pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/53 "2019-08-04T20:10:33Z")
Any way to split a variable and only keep one part? Ex variable contains: “Homey Blog [https://blog.athom.com/](https://blog.athom.com/)” Can I split it and only keep the webadress? ---
**Author:** ![Sander\_Vlotman](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sander_vlotman/32/7855_2.png) [@Sander\_Vlotman](https://community.homey.app/u/Sander_Vlotman)\ **Post date:** [August 30, 2019, 9:30am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/54 "2019-08-30T09:30:39Z")
Hi there, is there any manual or step by step explanation of how to use better logic? I like to build a string with a variable #YYYY and #MM #DD of the current day in it to create a string to stream the dutch news (20.00 nos journaal) to chromecast but tried and could not solve this myself. So what I want is [https://download.omroep.nl/nos/content/mp4/web02/2019/08/29/43866/mp4\_web02.mp4](https://download.omroep.nl/nos/content/mp4/web02/2019/08/29/43866/mp4_web02.mp4) where I replace the date with a vriable. But a general manual on how it works would even be greater as I see lots of possibilities for it (like triggers, etc). ---
**Author:** ![Sander\_Vlotman](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sander_vlotman/32/7855_2.png) [@Sander\_Vlotman](https://community.homey.app/u/Sander_Vlotman)\ **Post date:** [August 30, 2019, 4:10pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/55 "2019-08-30T16:10:35Z")
Ha discovered myself how it works (with the function mathjs expression and then dollar sign `$ # YYYY $` in it for the year) somehow `$` disappear in this forum. Now I come to the next challenge. Via IFTT and an RSS feed I retrieve a string containing a unique number for the mp4 of that journal. [https://nos.nl/b/43885](https://nos.nl/b/43885) now I want to get that number from this string so need to remove a part of the string ([https://nos.nl/b/](https://nos.nl/b/)). Again a manual or some help is welcome. I will then share my project with the NOS chromecast feed app that no longer works. ---
**Author:** ![Eddy\_Poot](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eddy_poot/32/9878_2.png) [@Eddy\_Poot](https://community.homey.app/u/Eddy_Poot)\ **Post date:** [September 2, 2019, 6:40pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/58 "2019-09-02T18:40:30Z")
Hi, how have you been able to use the time in an expression? I am trying to copy time (#HH and #mm) into 2 separate variables. However, the variables change to empty ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/8/8438bc4884f2eb888f31b3d2d27ef10096b4092e.jpeg) Any help will be apreciated ---
**Author:** ![Sander\_Vlotman](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sander_vlotman/32/7855_2.png) [@Sander\_Vlotman](https://community.homey.app/u/Sander_Vlotman)\ **Post date:** [September 2, 2019, 8:01pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/59 "2019-09-02T20:01:01Z")
![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/0/06688b923dede90a8b55f73283f9b765f932e678.jpeg) You have to use dollar sign. hope it works ---
**Author:** ![Eddy\_Poot](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eddy_poot/32/9878_2.png) [@Eddy\_Poot](https://community.homey.app/u/Eddy_Poot)\ **Post date:** [September 2, 2019, 8:22pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/60 "2019-09-02T20:22:26Z")
Don’t know what I did wrong, but now it is working. Thannks very much for the fast response! ---
**Author:** ![piotro](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/piotro/32/27212_2.png) [@piotro](https://community.homey.app/u/piotro)\ **Post date:** [October 7, 2019, 6:04pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/61 "2019-10-07T18:04:18Z")
Hello everybody, I am setting the BL string var in homeyScript, but it does not work due to “/” char. ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/1/2/1298bbb332db44967db0ec3c17cccd9868a1a2fe.png) console.log gives: ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/1/1/11510c2f2a02b0c60836fbb473c5cc112d49028a.png) but the BL variable RandomMusicURL is not updated. I found out that all works as expected when removing “/” sign from the string. But / is not an escape char, so what’s wrong here? ---
**Author:** ![Edgar](https://avatars.discourse-cdn.com/v4/letter/e/b487fb/32.png) [@Edgar](https://community.homey.app/u/Edgar)\ **Post date:** [December 22, 2019, 10:50am UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/62 "2019-12-22T10:50:33Z")
I am also looking for the answer to that question. Do you already know it? Or maybe somebody else? ---
**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\ **Post date:** [December 22, 2019, 5:29pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/63 "2019-12-22T17:29:55Z")
let BLApp = await Homey.apps.getApp({id:“net.i-dev.betterlogic” }); BLApp.apiPut(‘Klok12h/’ + theHour); ---
**Author:** ![PEAR7777](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/pear7777/32/12956_2.png) [@PEAR7777](https://community.homey.app/u/PEAR7777)\ **Post date:** [January 18, 2020, 4:07pm UTC](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568/64 "2020-01-18T16:07:30Z")
Great app, would like to see a figure at the number slide device? [Previous page](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568.md?page=2) [Next page](https://community.homey.app/t/app-pro-better-logic-library-just-some-better-logic-variable-and-library-management/5568.md?page=4)