Another math Operator?
1. Could we have an "inc" or increment that adds one (or n) to its input as this is a useful and commonly used alternative to add 1 to self?. Regards Tony On Friday, February 8, 2019 at 8:42:06 AM UTC+11, Jeremy Ruston wrote: > > Hi Mat > > Great, glad you like it! This is a new implementation that emerged from > discussions about a different issue on GitHub (see > https://github.com/Jermolene/TiddlyWiki5/pull/3572#issuecomment-460958193 > ). > > It is a bit different than Matt’s Calc plugin < > https://github.com/mklauber/tiddly-calc> and Evan’s Formula plugin < > https://github.com/EvanBalster/TiddlyWikiFormula>. It doesn’t use > conventional “postfix” maths notation (ie, the familiar stuff like (2+2)/3 > etc.). Instead, it implements maths operations as filter operators that > work the same way as others except that they interpret their arguments as > numbers and numeric results are converted to strings. > > I went for this approach because it makes things really, really small and > simple: by re-using all the existing filter operator infrastructure we > avoid having to add or implement a new expression parser. On the other > hand, it means that it isn’t much use for formulae that have been entered > by users not familiar with TiddlyWiki’s filter syntax. We’ll still need > plugins like those above for those applications. > > I haven’t quite finished the documentation, but the list of new operators > is as follows - there are new string operators like split and join as well > as the maths operators: > > *negate* - negation > *abs* - absolute value > *ceil* - smallest integer greater than or equal to a given number > *floor* - the largest integer less than or equal to a given number > *round* - the value of a number rounded to the nearest integer > *trunc* - the integer part of a number by removing any fractional digits > *sign* - the sign of a number, indicating whether the number is positive, > negative or zero > *add* - add an operand to every number in the input list > *subtract* - subtract an operand from every number in the input list > *multiply* - multiply every number in the input list by an operand > *divide* - divide every number in the input list by an operand > *remainder* - replace each item in the input list with the remainder when > dividing that number by an operand > *max* - replace any number in the input list larger than the operand with > the operand > *min* - replace any number in the input list smaller than the operand > with the operand > *fixed* - formats a number using fixed-point notation with the number of > fractional digits after the decimal point given by the operand > *precision* - returns a string representing the number to the precision > specified in the operand > *exponential* - returns a string representing the Number object in > exponential notation with the number of digits after the decimal point > specified in the operand > *sum* - replaces the input list with the sum of all the entries > *product* - replaces the input list with the product of all the entries > *maxall* - replaces the input list with the maximum value of all the > entries > *minall* - replaces the input list with the minimum value of all the > entries > *length* - replaces each item in the input list with its string length in > characters > *uppercase* - replaces each item in the input with its uppercase > equivalent > *lowercase* - replaces each item in the input with its lowercase > equivalent > *trim* - trims each item in the input list > *concat* - concatenates all of the items in the input list into a single > string > *split* - splits each of the items in the input list by a given separator > *join* - joins all of the items in the input list with a given separator > > > As usual, any comments and thoughts welcome, > > Best wishes > > Jeremy > > > > On 7 Feb 2019, at 20:42, Mat <[email protected] <javascript:>> wrote: > > Hi guys! ...in spite of my absence I do 'peek by' occasionally and I just > noted that math operators are added to the prerelease > <https://tiddlywiki.com/prerelease/#Mathematics%20Operators>! > > I just want to thank whoever is behind this (Evan?), plus Jeremy for > including it in core! Basic math ops is one of those things that anyone > needs either sooner or later in a utility tool like TW, so: THANK YOU! > > Also, anyone curious about TW should hear about this right away so it > deserves a mention in HelloThere. > > IMO, "basic math" was the missing piece to fulfill the "minimum of a fully > *general* note-taking tool" - i.e: produce text, produce images, do > calculations. > > Wonderful! > > <:-) > > P.S sorry for my absence but it will continue for a while. > > -- > You received this message because you are subscribed to the Google Groups > "TiddlyWiki" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > To post to this group, send email to [email protected] > <javascript:>. > Visit this group at https://groups.google.com/group/tiddlywiki. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tiddlywiki/1eaad72c-4e80-4999-926c-13cf7ea16ba8%40googlegroups.com > > <https://groups.google.com/d/msgid/tiddlywiki/1eaad72c-4e80-4999-926c-13cf7ea16ba8%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > > > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. 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