kopia lustrzana https://github.com/miklobit/TiddlyWiki5
139 wiersze
3.4 KiB
JavaScript
139 wiersze
3.4 KiB
JavaScript
/*\
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title: $:/core/modules/filters/math.js
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type: application/javascript
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module-type: filteroperator
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Filter operators for math. Unary/binary operators work on each item in turn, and return a new item list.
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Sum/product/maxall/minall operate on the entire list, returning a single item.
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Note that strings are converted to numbers automatically. Trailing non-digits are ignored.
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* "" converts to 0
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* "12kk" converts to 12
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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exports.negate = makeNumericBinaryOperator(
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function(a) {return -a}
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);
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exports.abs = makeNumericBinaryOperator(
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function(a) {return Math.abs(a)}
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);
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exports.ceil = makeNumericBinaryOperator(
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function(a) {return Math.ceil(a)}
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);
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exports.floor = makeNumericBinaryOperator(
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function(a) {return Math.floor(a)}
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);
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exports.round = makeNumericBinaryOperator(
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function(a) {return Math.round(a)}
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);
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exports.trunc = makeNumericBinaryOperator(
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function(a) {return Math.trunc(a)}
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);
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exports.untrunc = makeNumericBinaryOperator(
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function(a) {return Math.ceil(Math.abs(a)) * Math.sign(a)}
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);
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exports.sign = makeNumericBinaryOperator(
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function(a) {return Math.sign(a)}
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);
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exports.add = makeNumericBinaryOperator(
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function(a,b) {return a + b;}
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);
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exports.subtract = makeNumericBinaryOperator(
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function(a,b) {return a - b;}
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);
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exports.multiply = makeNumericBinaryOperator(
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function(a,b) {return a * b;}
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);
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exports.divide = makeNumericBinaryOperator(
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function(a,b) {return a / b;}
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);
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exports.remainder = makeNumericBinaryOperator(
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function(a,b) {return a % b;}
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);
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exports.max = makeNumericBinaryOperator(
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function(a,b) {return Math.max(a,b);}
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);
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exports.min = makeNumericBinaryOperator(
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function(a,b) {return Math.min(a,b);}
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);
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exports.fixed = makeNumericBinaryOperator(
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function(a,b) {return Number.prototype.toFixed.call(a,Math.min(Math.max(b,0),100));}
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);
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exports.precision = makeNumericBinaryOperator(
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function(a,b) {return Number.prototype.toPrecision.call(a,Math.min(Math.max(b,1),100));}
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);
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exports.exponential = makeNumericBinaryOperator(
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function(a,b) {return Number.prototype.toExponential.call(a,Math.min(Math.max(b,0),100));}
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);
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exports.sum = makeNumericReducingOperator(
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function(accumulator,value) {return accumulator + value},
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0 // Initial value
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);
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exports.product = makeNumericReducingOperator(
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function(accumulator,value) {return accumulator * value},
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1 // Initial value
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);
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exports.maxall = makeNumericReducingOperator(
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function(accumulator,value) {return Math.max(accumulator,value)},
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-Infinity // Initial value
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);
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exports.minall = makeNumericReducingOperator(
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function(accumulator,value) {return Math.min(accumulator,value)},
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Infinity // Initial value
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);
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function makeNumericBinaryOperator(fnCalc) {
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return function(source,operator,options) {
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var result = [],
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numOperand = $tw.utils.parseNumber(operator.operand);
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source(function(tiddler,title) {
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result.push($tw.utils.stringifyNumber(fnCalc($tw.utils.parseNumber(title),numOperand)));
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});
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return result;
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};
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}
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function makeNumericReducingOperator(fnCalc,initialValue) {
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initialValue = initialValue || 0;
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return function(source,operator,options) {
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var result = [];
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source(function(tiddler,title) {
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result.push(title);
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});
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return [$tw.utils.stringifyNumber(result.reduce(function(accumulator,currentValue) {
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return fnCalc(accumulator,$tw.utils.parseNumber(currentValue));
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},initialValue))];
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};
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}
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})();
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