mirror of
https://github.com/laurent22/joplin.git
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102 lines
2.7 KiB
TypeScript
102 lines
2.7 KiB
TypeScript
export const unique = function(array: any[]) {
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return array.filter(function(elem, index, self) {
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return index === self.indexOf(elem);
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});
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};
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export const removeElement = function(array: any[], element: any) {
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const index = array.indexOf(element);
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if (index < 0) return array;
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const newArray = array.slice();
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newArray.splice(index, 1);
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return newArray;
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};
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// https://stackoverflow.com/a/10264318/561309
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export const binarySearch = function(items: any[], value: any) {
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let startIndex = 0,
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stopIndex = items.length - 1,
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middle = Math.floor((stopIndex + startIndex) / 2);
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while (items[middle] !== value && startIndex < stopIndex) {
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// adjust search area
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if (value < items[middle]) {
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stopIndex = middle - 1;
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} else if (value > items[middle]) {
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startIndex = middle + 1;
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}
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// recalculate middle
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middle = Math.floor((stopIndex + startIndex) / 2);
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}
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// make sure it's the right value
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return items[middle] !== value ? -1 : middle;
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};
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export const findByKey = function(array: any[], key: any, value: any) {
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for (let i = 0; i < array.length; i++) {
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const o = array[i];
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if (typeof o !== 'object') continue;
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if (o[key] === value) return o;
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}
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return null;
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};
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export const contentEquals = function(array1: any[], array2: any[]) {
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if (array1 === array2) return true;
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if (!array1.length && !array2.length) return true;
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if (array1.length !== array2.length) return false;
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for (let i = 0; i < array1.length; i++) {
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const a1 = array1[i];
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if (array2.indexOf(a1) < 0) return false;
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}
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return true;
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};
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// Merges multiple overlapping intervals into a single interval
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// e.g. [0, 25], [20, 50], [75, 100] --> [0, 50], [75, 100]
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export const mergeOverlappingIntervals = function(intervals: any[], limit: number) {
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intervals.sort((a, b) => a[0] - b[0]);
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const stack: any[] = [];
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if (intervals.length) {
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stack.push(intervals[0]);
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for (let i = 1; i < intervals.length && stack.length < limit; i++) {
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const top = stack[stack.length - 1];
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if (top[1] < intervals[i][0]) {
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stack.push(intervals[i]);
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} else if (top[1] < intervals[i][1]) {
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top[1] = intervals[i][1];
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stack.pop();
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stack.push(top);
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}
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}
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}
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return stack;
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};
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export const shuffle = function(array: any[]) {
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array = array.slice();
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for (let i = array.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1));
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const temp = array[i];
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array[i] = array[j];
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array[j] = temp;
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}
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return array;
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};
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// Used to replace lodash.pull, so that we don't need to import the whole
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// package. Not optimised.
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export const pull = (array: any[], ...elements: any[]) => {
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const output: any[] = [];
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for (const e of array) {
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if (elements.includes(e)) continue;
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output.push(e);
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}
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return output;
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};
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