1.0.19 ā¢ Published 2 months ago
@dtable/formula v1.0.19
dtable-formula
Install
npm install --save @dtable/formula
Run tests
npm run test
Examples
List some simple examples for quick start.
prase text expression
import { formula } from "@dtable/formula";
formula("1 + 2"); // 3
get lexer result
import { tokenize } from "@dtable/formula";
tokenize("1 + 2");
// [
// { image: "1", tokenType: { name: "Number" } },
// { image: "+", tokenType: { name: "Plus" } },
// { image: "2", tokenType: { name: "Number" } },
// ];
use params
import { formula } from "@dtable/formula";
formula("{Number1} + {Number2}", { Number1: 1, Number2: 2 }); // 3
All Functions And Operators
Name | Type | Description |
---|---|---|
{} | Param operator | reference to a param. |
!= | Logical operator | Check if one value is not equal to another value. |
= | Logical operator | Compare if one value is equal to another value. |
>= | Logical operator | Compare if one value is greater than, or equal to, another value. |
> | Logical operator | Compare if one value is greater than another value |
<= | Logical operator | Compare if one value is less than, or equal to, another value. |
< | Logical operator | Compare if one value is less than another value. |
IF() | Logical function | It allows you to make logical comparisons between a value and what you expect |
+ | Numeric operator | Add together two values. |
- | Numeric operator | Subtract two values. |
* | Numeric operator | Multiply two values. |
/ | Numeric operator | Divide two values. |
ABS() | Numeric function | Returns the absolute value. |
ROUND() | Numeric function | Rounds the value to the number of decimal places given by precision. |
ROUNDUP() | Numeric function | Rounds the value to the number of decimal places given by precision, always rounding up. |
ROUNDDOWN() | Numeric function | Rounds the value to the number of decimal places given by precision, always rounding down. |
INT() | Numeric function | Returns the greatest integer that is less than or equal to the specified value. |
MAX() | Numeric function | Returns the largest of the given numbers. |
MIN() | Numeric function | Returns the smallest of the given numbers. |
& | Strings operator | Concatenate strings. |
CONCATENATE() | Strings function | Concatenate strings. |
REPT() | Strings function | Repeats text a given number of times. |
LEN() | Strings function | Get the length of the string |
DATETIME_FORMAT() | Date function | Reformat the data from the date-type field into a string of your specifications |
SET_TIMEZONE() | Date function | Set the time zone for the date |
Author
š¤ zhangchao1997
- Github: @little-thing
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