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Convert simple array into array of objects and add new property [closed]

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I have an array
const databaseName = ['Oracle','Mysql','MongoDb'];
the expected output is
const database = [
{
name:'Oracle',
isAvailable:true
},
{
name:'Mysql',
isAvailable:true
},
{
name:'MongoDb',
isAvailable:true
}
]
This has to be done using Javascript and es6.
i have tried using
const database = {...databaseName ,isAvailable:true}

const databaseName = ['Oracle','Mysql','MongoDb'];
console.log(
databaseName.map(name => {
return {
name,
isAvailable:true
}
})
)

How to replace debounceTime(0) to emit when needed? [closed]

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I have a similar use case to this
import { BehaviorSubject, combineLatest } from 'rxjs'
import { map, debounceTime } from 'rxjs/operators'
const items$ = new BehaviorSubject([]);
const size$ = new BehaviorSubject(10);
const visibleItems$ = combineLatest([items$, size$])
.pipe(
debounceTime(0),
map(([items, size]) => items.slice(0, size))
);
And some times I have this scenario
const onData = bigArr => {
items$.next(bigArr);
}
Sometimes this
const changeSize = () => {
size$.next(20);
}
And sometimes this
const onData2 = bigArr => {
items$.next(bigArr);
size$.next(10);
}
I don't want to trigger the visibleItems$ observable flow multiple times, so a solution that I've found is use the debounceTime operator with 0 ms to perform the onData2 method without running the pipe operators twice, but it is a bit hard to reason this operator (at least from the first glance). How can I replace it, so my code is easier to understand?

Best way to filter arrays based on condtion [closed]

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I'm getting data from an API and I want to filter the array down based on the issue state. The following code works, but is there a nice way to write this?
let issuesToUse = this.state.issues;
if(this.state.issueState.status === 'closed'){
issuesToUse = this.state.issues.filter(issue => {
return issue.state === 'closed';
})
} else {
issuesToUse = this.state.issues.filter(issue => {
return issue.state === 'open';
})
}

issuesToUse = this.state.issues.filter(issue => issue.state === this.state.issueState.status)

You could try something like this example
let targetState = this.state.issueState.status;
let issuesToUse = this.state.issues.filter(
({ state }) => state === targetState
);
See
Destructuring assignment

If you have other states as well, you need to check the state in advance for filtering.
let issuesToUse = this.state.issues;
if (['closed', 'open'].includs(this.state.issueState.status)) {
issuesToUse = this.state.issues.filter(({ state }) => state === this.state.issueState.status)
}

How to un-obfuscate JavaScript starting with const and a bunch of vars [closed]

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Hi i found this extension and would like to see the contents of the script itself to check what is actually does. I tried putting the script through all sort of javascript de/un-obfuscators and none worked.
Please tell me one that works or send me the de-obfuscated JS.
CODE HERE

The point of obfuscating something is so it cant be reversed. It has stripped all names and minified intentionally to make it as hard as possible.
You can reverse it partially but it won't be very readable.
For example if you obfuscate this
function hi(first, second) {
const third = first + second
return third
}
hi(1, 2);
You will get something like this.
function hi(_0x850806,_0x3f2655){const _0x2231a6=_0x850806+_0x3f2655;return _0x2231a6;}hi(0x1,0x2);
As this only uses primitive functionality it can easily be reversed to
function hi(_0x850806, _0x3f2655) {
const _0x2231a6 = _0x850806 + _0x3f2655;
return _0x2231a6;
}
hi(0x1, 0x2);
However, if you use some more complex functions (eg Array.includes). Like this
function hi(first, arr) {
if (arr.includes(first)) {
console.log('true')
} else {
console.log('false')
}
}
const res = hi(1, [1, 2, 3]);
This can be obfuscated to
const _0x41ab=['includes','log','true'];(function(_0x4972c4,_0x6d8a76){const _0x4e2cf3=function(_0x383eb3){while(--_0x383eb3){_0x4972c4['push'](_0x4972c4['shift']());}};_0x4e2cf3(++_0x6d8a76);}(_0x41ab,0x1d7));const _0x4ad9=function(_0x4972c4,_0x6d8a76){_0x4972c4=_0x4972c4-0x0;let _0x4e2cf3=_0x41ab[_0x4972c4];return _0x4e2cf3;};function hi(_0x5b3f5d,_0x577a76){if(_0x577a76[_0x4ad9('0x0')](_0x5b3f5d)){console['log'](_0x4ad9('0x2'));}else{console[_0x4ad9('0x1')]('false');}}const res=hi(0x1,[0x1,0x2,0x3]);
After tidying it up you get this.
const _0x41ab = ['includes', 'log', 'true'];
(function(_0x4972c4, _0x6d8a76) {
const _0x4e2cf3 = function(_0x383eb3) {
while (--_0x383eb3) {
_0x4972c4['push'](_0x4972c4['shift']());
}
};
_0x4e2cf3(++_0x6d8a76);
}(_0x41ab, 0x1d7));
const _0x4ad9 = function(_0x4972c4, _0x6d8a76) {
_0x4972c4 = _0x4972c4 - 0x0;
let _0x4e2cf3 = _0x41ab[_0x4972c4];
return _0x4e2cf3;
};
function hi(_0x5b3f5d, _0x577a76) {
if (_0x577a76[_0x4ad9('0x0')](_0x5b3f5d)) {
console['log'](_0x4ad9('0x2'));
} else {
console[_0x4ad9('0x1')]('false');
}
}
const res = hi(0x1, [0x1, 0x2, 0x3]);
As you can see, this snippet will give the same output as the non-obfuscated code, however, is much harder to read.
Now imagine applying this to a big project and you see why it is almost impossible.

Serialized array save to mysql with php and orderby [closed]

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This is javascript serialized array:
[{"id":1},{"id":2},{"id":3,"children":[{"id":4,"children":[{"id":5},{"id":6},{"id":7}]},{"id":8}]}]
How to save this (dynamic) to mysql with php like this:
***********************************
| id | subsite_id | orderby |
1 0 0
2 0 1
3 0 2
4 3 0
5 4 0
6 4 1
7 4 2
8 3 1
***********************************
Thanks for answer.

This might not be the best solution, but it's certainly a solution. Recently, I learned about RecursiveIterators and their cousin, RecursiveIteratorIterator. So, I took it upon myself to use them in everything I code (relevant XKCD: https://xkcd.com/208/).
I hacked this up quickly:
class ChildIDIterator implements RecursiveIterator{
private $_array;
private $_position = 0;
private $_parent;
public function __construct(array $array, $parent=0) {
$this->_array = $array;
$this->_parent = $parent;
}
function valid(){
return isset($this->_array[$this->_position]);
}
function current() {
return $this->_array[$this->_position]['id'];
}
function next() {
$this->_position++;
}
function rewind() {
$this->_position = 0;
}
function key() {
return $this->_position;
}
function hasChildren(){
return isset($this->_array[$this->_position]['children']);
}
function getChildren(){
return new self(
$this->_array[$this->_position]['children'],
$this->_array[$this->_position]['id']
);
}
function getParent(){
return $this->_parent;
}
}
This recursively iterates over your (decoded) array and returns the id values. To use it, you can do this:
$json = '[{"id":1},{"id":2},{"id":3,"children":[{"id":4,"children":[{"id":5},{"id":6},{"id":7}]},{"id":8}]}]';
$array = json_decode($json, TRUE);
$iterate = new RecursiveIteratorIterator(new ChildIDIterator($array), RecursiveIteratorIterator::SELF_FIRST);
foreach($iterate as $order=>$id){
echo "UPDATE sites SET subsite_id={$iterate->getParent()}, orderby={$order} WHERE id={$id};\n";
}
DEMO: https://eval.in/57189