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Mar 28, 2023Helper
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More JavaScript Posts

Truncate to fixed decimal

Nov 19, 2022CodeCatch

0 likes • 0 views

const toFixed = (n, fixed) => ~~(Math.pow(10, fixed) * n) / Math.pow(10, fixed);
// Examples
toFixed(25.198726354, 1); // 25.1
toFixed(25.198726354, 2); // 25.19
toFixed(25.198726354, 3); // 25.198
toFixed(25.198726354, 4); // 25.1987
toFixed(25.198726354, 5); // 25.19872
toFixed(25.198726354, 6); // 25.198726

typewriter-effect in Vanilla JS and React

Jan 25, 2023C S

0 likes • 7 views

// Vanilla JS Solution:
var app = document.getElementById('app');
var typewriter = new Typewriter(app, { loop: true });
typewriter
.typeString("I'm John and I'm a super cool web developer")
.pauseFor(3000)
.deleteChars(13) // "web developer" = 13 characters
.typeString("person to talk with!") // Will display "I'm John and I'm a super cool person to talk with!"
.start();
// React Solution:
import Typewriter from 'typewriter-effect';
<Typewriter
options={{ loop: true }}
onInit={typewriter => {
typewriter
.typeString("I'm John and I'm a super cool web developer")
.pauseFor(3000)
.deleteChars(13) // "web developer" = 13 characters
.typeString("person to talk with!") // Will display "I'm John and I'm a super cool person to talk with!"
.start();
}}
/>

Ticking clock

Nov 19, 2022CodeCatch

0 likes • 0 views

function Clock(props) {
return (
<div>
<h1>Hello, world!</h1>
<h2>It is {props.date.toLocaleTimeString()}.</h2>
</div>
);
}
function tick() {
ReactDOM.render(
<Clock date={new Date()} />,
document.getElementById('root')
);
}
setInterval(tick, 1000);

Canvas File Downloader

Nov 18, 2022AustinLeath

0 likes • 5 views

results =
{
"11345240":"Media Comment-80e47004-1719-493a-af69-a43b2652b41c",
"11345282":"zoom_3_22_21.mp4",
"11345303":"Recording-2.m4a",
"11345348":"February 12%2C 2021.mp4",
"11345826":"Lecture_Rousso_Chapter_06-2.pptx",
"11345933":"Themes_InClassAssigment.pptx",
"11346193":"Agenda – Week of March23.pptx",
"11346318":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Bb - Score.pdf",
"11346319":"MUJS 2370 SP2021 Updated Rhythm Changes Drills C - Score.pdf",
"11346322":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Eb - Score.pdf",
"11346323":"MUJS 2370 Updated Rhythm Changes Drills Bass - Score.pdf",
"11346381":"Anthropology with colored highlighter analysis - Mar 22 2021 - 10-36 AM.pdf",
"11346449":"Anthropology with colored highlighter analysis - Mar 22 2021 - 10-36 AM.pdf",
"11346450":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Bb - Score.pdf",
"11346451":"MUJS 2370 SP2021 Updated Rhythm Changes Drills C - Score.pdf",
"11346453":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Eb - Score.pdf",
"11346454":"MUJS 2370 Updated Rhythm Changes Drills Bass - Score.pdf",
"11346495":"Steinel chromatic ornamentation étude rhythm changes - Aug 23 2020 - 12-19 PM.pdf",
"11346532":"Media Comment-136242b4-7f2c-4d5d-8aa4-091f07e797cf",
"11346581":"2019 Trust Based Relationship Intervention Manual.pdf",
"11346584":"TBRI ppt.pptx",
"11346593":"Trauma informed care.ppt"
}
function NewTab(testing) {
window.open(testing, "_blank");
}
for(test in results) {
var testing = 'https://unt.instructure.com/files/' + test + '/download';
NewTab(testing);
//window.open = 'https://unt.instructure.com/files/' + test + '/download';
}

LeetCode Product Except Self

Sep 13, 2023C S

0 likes • 11 views

/**
* @param {number[]} nums
* @return {number[]}
*/
var productExceptSelf = function(nums) {
var output = [];
var leftMult = 1;
var rightMult = 1;
for (var i=nums.length - 1; i >= 0; i--) {
output[i] = rightMult;
rightMult *= nums[i];
console.log({output: JSON.stringify(output), i})
}
for (var j=0; j < nums.length; j++) {
output[j] *= leftMult;
leftMult *= nums[j];
console.log({output: JSON.stringify(output), j})
}
return output;
};
console.log(productExceptSelf([1, 2, 3, 4]))

Mongoose Model

Mar 11, 2021C S

0 likes • 1 view

const mongoose = require('mongoose')
const UserSchema = new mongoose.Schema({
username: {
type: String,
required: true
},
email: {
type: String,
unique: true,
required: true
},
password: {
type: String,
required: true
},
date: {
type: Date,
default: Date.now
}
})
module.exports = User = mongoose.model('user', UserSchema)