Skip to main content

Bitwise XOR operator

Nov 19, 2022CodeCatch
Loading...

More JavaScript Posts

Responsive Bootstrap Card.Img

Jan 25, 2023C S

0 likes • 20 views

const ResponsiveCardImg = styled(Card.Img)`
// For screens wider than 768px
@media(min-width: 768px) {
// Your responsive styles here.
}
// For screens smaller than 768px
@media(max-width: 768px) {
// Your responsive styles here.
}
`
export default function App() {
return (
<MainContainer>
<Container>
<Card text='white' bg='dark' style={styles.mainCard}>
<ResponsiveCardImg
style={styles.cardImage}
onClick={handleClick}
src={apeImage}
alt='Degenerate Ape Academy'
/>
<Card.Body>
<Card.Title className='text-center' as='h2'>
{apeId}
</Card.Title>
</Card.Body>
</Card>
</Container>
</MainContainer>
);
}

Horizontal legend (d3.js)

Dec 17, 2024shaiRos

0 likes • 2 views

const rectSize = 15; // Size of the color box
const spacing = 5; // Space between legend items
let legend = canvas.append('g').attr('class','chart-legend')
.attr('transform', `translate(${0}, ${height + 3})`);
// Sample data for the legend
const legendData = [
{ label: 'low', color: '#1f77b4' },
{ label: 'medium', color: '#ff7f0e' },
{ label: 'high', color: '#2ca02c' },
{ label: 'very high', color: '#2ca02c' }
];
legend.selectAll('g')
.data(legendData)
.join('g')
.attr('class', 'legend-item')
.each(function (d, i) {
const legendItem = d3.select(this);
console.log(d.label)
console.log(d.label?.length)
let labelWidth = (d.label.length * 5) + 7 + 15
var bbox = legendItem.node().getBBox()
var width = bbox.width
console.log(width)
// Add rectangle for color
legendItem.append('rect')
.attr('width', rectSize)
.attr('height', rectSize)
.attr('fill', d.color);
// Add label
legendItem.append('text')
.attr('x', rectSize + spacing) // Position text to the right of the rectangle
.attr('y', rectSize / 2) // Align text vertically with the rectangle
.attr('dy', '.35em') // Adjust vertical alignment
.attr('text-anchor', 'start') // Align text to the start
.text(d.label)
.attr('fill', 'black'); // Optional: Text color
// legendItem.attr('transform', `translate(${i * (rectSize + spacing + labelWidth)}, 0)`) // Position each item horizontally
});
const legendItems_spacing = 12
var legendLength = 0
legend.selectAll('.legend-item').each(function(d,i) {
d3.select(this).attr('transform',function() {
var bbox = d3.select(this).node().getBBox()
var width = bbox.width
// if (width == 0) width = (d.text.length * 5) +15 // not in dom yet
let startingPosition = 0
if (i > 0) {
startingPosition = legendLength
}
legendLength += width + legendItems_spacing
// return `translate(${xx - (width + 30)},0$)`
return `translate(${startingPosition},0)`
})
})

quick sort

Nov 19, 2022CodeCatch

0 likes • 0 views

const quickSort = arr => {
const a = [...arr];
if (a.length < 2) return a;
const pivotIndex = Math.floor(arr.length / 2);
const pivot = a[pivotIndex];
const [lo, hi] = a.reduce(
(acc, val, i) => {
if (val < pivot || (val === pivot && i != pivotIndex)) {
acc[0].push(val);
} else if (val > pivot) {
acc[1].push(val);
}
return acc;
},
[[], []]
);
return [...quickSort(lo), pivot, ...quickSort(hi)];
};
quickSort([1, 6, 1, 5, 3, 2, 1, 4]); // [1, 1, 1, 2, 3, 4, 5, 6]

Tree Traversal

Oct 16, 2023C S

0 likes • 7 views

class TreeNode {
constructor(data, depth) {
this.data = data;
this.children = [];
this.depth = depth;
}
}
function buildNaryTree(hosts) {
const nodeMap = {};
// Step 1: Create a map of nodes using fqdn as the key
hosts.forEach((host) => {
nodeMap[host.fqdn] = new TreeNode(host, 0); // Initialize depth to 0
});
// Step 2: Iterate through the array and add each node to its parent's list of children
hosts.forEach((host) => {
if (host.displayParent) {
if (nodeMap[host.displayParent]) {
const parent = nodeMap[host.displayParent];
const node = nodeMap[host.fqdn];
node.depth = parent.depth + 1; // Update the depth
parent.children.push(node);
} else {
console.error(`Parent with fqdn ${host.displayParent} not found for ${host.fqdn}`);
}
}
});
// Find the root nodes (nodes with no parent)
const rootNodes = hosts.filter((host) => !host.displayParent).map((host) => nodeMap[host.fqdn]);
return rootNodes;
}
function treeToObjects(node) {
const result = [];
function inOrder(node) {
if (!node) {
return;
}
// Visit the current node and add it to the result
result.push(node.data);
// Visit children nodes first
node.children.forEach((child) => {
inOrder(child);
});
}
inOrder(node);
return result;
}
// Usage example
const hosts = [
{
fqdn: 'fqdn_1',
display_name: 'Host 1',
},
{
fqdn: 'fqdn_2',
display_name: 'Host 2',
displayParent: 'fqdn_1',
},
{
fqdn: 'fqdn_3',
display_name: 'Host 3'
},
{
fqdn: 'fqdn_4',
display_name: 'Host 4',
displayParent: 'fqdn_3',
},
{
fqdn: 'fqdn_5',
display_name: 'Host 5',
displayParent: 'fqdn_1',
},
];
const tree = buildNaryTree(hosts);
// Function to convert the tree to an array of objects
function convertTreeToArray(nodes) {
const result = [];
nodes.forEach((node) => {
result.push(...treeToObjects(node));
});
return result;
}
// Convert the tree back to an array of objects
const arrayFromTree = convertTreeToArray(tree);
console.log(arrayFromTree);

Redux Slice

Mar 11, 2021C S

1 like • 0 views

import { createSlice } from "@reduxjs/toolkit";
const alert = createSlice({
name: "alert",
initialState: {
msg: "",
status: "",
},
reducers: {
set_alert: (state, action) => {
return {
...state,
msg: action.payload.msg,
status: action.payload.status,
};
},
clear_alert: (state, action) => {
return {
...state,
msg: "",
status: "",
};
},
},
});
export default alert.reducer;
const { set_alert, clear_alert } = alert.actions;
export const setAlert = (msg, status) => dispatch => {
dispatch(set_alert({ msg, status }));
setTimeout(() => dispatch(clear_alert()), 4000);
};
export const clearAlert = () => dispatch => {
dispatch(clear_alert());
};

React Short Circuit Evaluation

Feb 3, 2021C S

0 likes • 0 views

import React, { useState } from 'react' import Welcome from '../components/Welcome' function About() { const [showWelcome, setShowWelcome] = useState(false) return ( <div> {showWelcome ? <Welcome /> : null} </div> <div> {showWelcome && <Welcome /> } </div> ) } export default App