// Remove all the values
function destroyer(arr) {
// create filter list filterMe and fill it with all elements in arr except arr[0]
var filterMe = [];
for (var z = 1; z<arr.length; z++) {
filterMe.push(arr[z]);
}
// create a list of numbers which represent the indexes of arr elements to filter
var filterIndex = [];
// for loop through arr[0]
for (var y = 0; y<arr[0].length; y++) {
// for loop through filterMe
for (var x = 0; x<filterMe.length; x++) {
// if arr[0][y] === filterMe[x]
if (arr[0][y]===filterMe[x]) {
// push the index 'x' to filterIndex
filterIndex.push(x); // will contain list of all indexes to splice.
}
}
}
// new array to hold elements not cut from old arr[0]
var newArray = [];
// keep track of how many indexes have been cut with 'count'
var count = 0;
// iterate through filterIndex
for (var q=0; q<filterIndex.length; q++) {
// for loop through arr[0] again to find values not to cut
for (var r=0; r<arr[0].length; r++) {
// if filterIndex[q]===r then skip that number
if (filterIndex[q]===r) { // keep track of which filterIndex we're at with 'q'
// skip and add 1 to 'count'
count++;
} else {
newArray.push(arr[0][r-count]); // will only pick up the arr[0] elements not skipped
}
}
}
return newArray;
}
//test:
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
OK lol wow that's huge
@kbaig Kaz?
To those familiar with react, could you please help me figure out if I am doing anything wrong in this react challenge on the beta site?
Here is the link to the challenge: https://beta.freecodecamp.org/en/challenges/react/use-arraymap-to-dynamically-render-elements
Here is the link to the challenge: https://beta.freecodecamp.org/en/challenges/react/use-arraymap-to-dynamically-render-elements
Here is my current code:
const textAreaStyles = {
width: 235,
margin: 5
};
class MyToDoList extends React.Component {
constructor(props) {
super(props);
// change code below this line
this.state = {
userInput: '',
toDoList: []
};
// change code above this line
this.handleSubmit = this.handleSubmit.bind(this);
this.handleChange = this.handleChange.bind(this);
}
handleSubmit() {
const itemsArray = this.state.userInput.split(',');
this.setState({
toDoList: itemsArray
});
}
handleChange(e) {
this.setState({
userInput: e.target.value
});
}
render() {
const items = this.state.toDoList.map((x) => {
return <li> {x} </li>;
});
return (
<div>
<textarea
onChange={this.handleChange}
value={this.state.userInput}
style={textAreaStyles}
placeholder="Separate Items With Commas" /><br />
<button onClick={this.handleSubmit}>Create List</button>
<h1>My "To Do" List:</h1>
<ul>
{items}
</ul>
</div>
);
}
};The test that I am failing says:
"When the Create List button is clicked, the MyToDoList component should dynamically return an unordered list that contains a list item element for every item of a comma-separated list entered into the textarea element. };"
@kgalang Im working on a challenge
Try using a
for loop
what does that mean
oh, for loop
var factorialize(5) is invalid code
you use the
var keyword to define variables with the name that comes right after them
function factorialize(num) {
var factorialize = 1 2 3 4 5 == num;
return num;
}
factorialize(5);
var factorialize = 1 2 3 4 5 == num;
return num;
}
factorialize(5);
but it still is wrong
what are you trying to do here
the above code means "does 120 equal
num"?
Then some how i will multiply it by them in order.
How would I get them in order?
some thing like that?