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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | 2x 2x 4x 4x 1x 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 4x 4x | import { courseStartTimeToEventRow } from '../constants/index';
import { SchedulerEvent } from '../types';
export const selectGroupsToShow = (schedulerEvents: Array<SchedulerEvent>, index: number) => {
return schedulerEvents.filter((schedulerEvent) => courseStartTimeToEventRow[schedulerEvent.time] === index);
};
//debounce declaration and implementation
type Procedure = (...args: any[]) => any;
interface Debounce {
(...args: any[]): any;
clear: () => void;
flush: () => void;
}
export const debounce = (func: Procedure, wait: number, immediate: boolean = false) => {
let timeout: number | null;
let args: any;
let context: any;
let result: any;
const later = () => {
timeout = null;
if (!immediate) {
result = func.apply(context, args);
context = args = null;
}
};
const debouncedFunc: Procedure = function (this: any) {
context = this;
args = arguments;
const callNow = immediate && !timeout;
Eif (!timeout) {
timeout = window.setTimeout(later, wait);
}
Iif (callNow) {
result = func.apply(context, args);
context = args = null;
}
return result;
};
const clear = () => {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
};
const flush = () => {
if (timeout) {
result = func.apply(context, args);
context = args = null;
clearTimeout(timeout);
timeout = null;
}
};
const debounced: Debounce = (() => {
const f: any = debouncedFunc;
f.clear = clear;
f.flush = flush;
return f;
})();
return debounced;
};
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