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Javascript: Remove letters outside of two parentesis [closed]

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So, hello. I edited the entire thing.
app.get('/', async (req, res) => {
let results = await db.collection("malwarepad-website").find("6047667ff156cb8135bdaa88").toArray()
//var resultsConverted = results.toString();
//let resultsFinal = resultsConverted.split('"');
console.log(results)
res.render('index.ejs', { startText: results });
})
In the above code I want to only keep the second part of it specified better in this image: https://i.stack.imgur.com/Wi031.png
I want to create a variable containing the following:
Hello, and welcome to my website. I don't know how you found me but yo...
I already have a constant containing the search results, but it is this:
[
{
_id: 6047667ff156cb8135bdaa88,
mainPage: "Hello, and welcome to my website. I don't know how you found me but you're welcome :)."
}
]
Thanks for the understanding :)

a = a.split("\"")[1]

If you mean extracting what's inside double quotations, you have two methods:
1 - Use Regular Expressions:
You can use regular expression /.*"(.*)".*/ which tries to capture everything inside parentheses. You can use exec method. like :
const importantPart = /.*"(.*)".*/.exec(a)[1] (a is your variable)
2 - Using indexOf string methods
In JavaScript strings have two useful methods: indexOf and lastIndexOf. In addition to a substring.
You can use these to extract the important part:
a.substring(a.indexOf('"') + 1, a.lastIndexOf('"'))

There are several solutions. One could be:
const a = 'odshniudfskdjnfdsjnf"Important part"fererferferef';
let a_splitted = a.split('"');
console.log(a_splitted[1]);

You can use regular expressions to extract the part that you need.
const a = 'odshniudfskdjnfdsjnf"Important part"fererferferef';
let result = a.match(/\"(.*)\"/);
console.log(result[1]);
There are a lot of what-ifs though.

const a = 'odshniudfskdjnfdsjnf"Important part"fererferferef';
let regex = /(?<=\")(.*?)(?=\")/;
let result = regex.exec(a)[0];
console.log(result);

Regex to replace all occurrences of li tags [closed]

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I want to replace all occurrences of li tags in a string with "\par {\pntext\f1 ''B7\tab}" and then append whatever data was within tags to the end of it.
Basically converting html to rtf format.
e.g
<ul><li>list1 line1</li></ul>
<ul><li><span>list2 line1</span></li></ul>
In the end i want to remove all ul tags
function convertHtmlToRtf(html) {
var richText = html;
richText = richText.replace(/<(?:b|strong)(?:\s+[^>]*)?>/ig, "{\\b\n");
return richText;
}

Your question is a bit broad, but since you say you are using javascript and want a Regex. Then I assume you have a string and want to replace pairs of <li></li> with the given string. Also assuming that your HTML is always very simple and predictable (no <li>s within <li>s), then you could do something like this:
var str = "<ul><li>list1</li></ul>\n<ul><li><span>list2 line1</span></li></ul>";
str.replace(/<li( [^>]*){0,1}>(.*)<\/li>/, "\\par {\\pntext\f1 ''B7\\tab} $2");
Here I'm using a regular expressions that matches a pair of <li> and replace them by that magic string but keeping whatever is inside (note you can easily extend it to also remove the ul if necessary. Ending result:
<ul>\par {\pntext1 ''B7\tab} list1</ul>
<ul>\par {\pntext1 ''B7\tab} <span>list2 line1</span></ul>
Now you can notice right away that it won't remove tags inside - so the <span> will be left there. If you can use jQuery, then it might be easier to convert the nodes correctly than using Regex (which can get quite complicated)
Edit:
Since it's been clarified that jQuery can be used to help on the parsing, then here is a simple example of how you could use it:
https://jsfiddle.net/nazy8sc6/2/
var html = "<ul><li>list1 <b>line1</b></li></ul><ul><li><span>list2 line1</span></li></ul>";
var TAB_STR = "\\par {\\pntext1 ''B7\\tab}";
function convertLi(parent, node) {
var convertedText = TAB_STR + " " + $(node).text() + "<br>";
var convertedNode = $('<span></span>').html(convertedText);
$(parent).append(convertedNode);
}
function convertHtmlToRtf(html) {
var result = $('<span></span>');
$(html).find('li').each((_, node) => {
convertLi(result, $(node));
})
return result.html().replace(/<br \>/g, "\n");
}
var res = convertHtmlToRtf(html);
console.log(res);
In this solution, you simply find all <li> tags and extract the content from it - I keep the original HTML always there and simply copy the converted content into a new HTML from which we finally extract the fully converted text. Hope this helps you, but let me know if I haven't managed to explain myself very well.

HTML + Alternative of Javascript Switch-Case for simple string & Constant [closed]

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In my Js script, I am using switch case but I dnt want to use it but I am not getting better alternative of this.
Here I am using Js CONSTANT as well for defining First URL & Second URL
var FIRST_URL = "/first_url.html"
var SECOND_URL = "/second_url.html"
& also passing FIRST_URL and SECOND_URL as parameter from function. That's why I used FIRST_URL with double quotes and without quotes.
Snippet :-
if(url == "DIV_ID"){
switch (url_type) {
case FIRST_URL:
case "FIRST_URL":
result = "/first_url.html";
break;
case SECOND_URL:
case "SECOND_URL":
result = "/second_url.html";
break;
default:
result = "other_url.html";
break;
}
}
Suggest something to resolve this.

You can use something like this, but add proper error checking.
Roughtly:
var arr = {};
arr['FIRST'] = 'your first url';
arr['SECOND'] = 'your second url';
result = arr[urlType];

here's an example using object literal:
var arr = {
FIRST : 'your first url',
SECOND: 'your second url'
};
console.log(arr.FIRST)
console.log(arr['SECOND'])
//for adding properties
arr.thr='third prop';
basically the resulting obj is the same to bigmike's answer, but it maybe easier to understand .
This is what is called a key-value pair and the structure is an object (JS definitions).
BTW there is nothing wrong with switch .

converting python code to javascript code [closed]

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can somebody help for my code which is written in python, i want to write it in javascript but im in trouble, i dont know how.
python code
cities={}
for line in open("linnadkaugustega.txt", "r", encoding="UTF-8"):
m=line.strip().split()
abim=[word.split(":") for word in m[1:]]
cities[m[0]]={}
for couple in abim:
cities[m[0]][couple[0]]=int(couple[1])
print(cities);
and i tried in javascript but that doesen't work
function tere(){
console.log("Tere");
$.get('read.txt', function(data) {
cities={};
var lines = (data.trim()).split();
abim=[var word.split(":") for word in m[1:]]
cities[m[0]]={};
for var couple in abim
cities[m[0]][couple[0]]=couple[1];
console.log(cities);
}, 'text');
}
tere();
can somebody help me ?

You have syntax issues translating from python to js. Heres how arrays work...
if you have an array litteral in javascript
var cities = [];
Then we would add to the array by calling push
cities.push('Portland');
...
cities.push('New York');
we can then iterate over the array by calling forEach on the array object.
cities.forEach(function (city, index){
//do work on each city
console.log(city);
});
// Portland
// New York

A few things:
.split() in JS does something different than split in python when no separator is given. To split a line into words, you'll need to split on whitespaces explicitly
you're missing the for loop over the lines of the file. Python uses the iterator syntax for reading from the file, in JavaScript an ajax request loads the whole file and you'll need to split it in lines yourself.
JavaScript does not have that m[1:] syntax, you'll need to use the .slice() method instead
JavaScript does not have array/list comprehensions. You will need to use an explicit loop, or the map method of arrays
your loop syntax is too pythonic. In JavaScript, for loops need parenthesis and an index variable.
So this should do (supposed you have the jQuery library loaded and it finds the file):
$.get('read.txt', function(data) {
var cities = {};
var lines = data.split("\n");
for (var i=0; i<lines.length; i++) {
var line = lines[i];
var m = line.trim().split(/\s+/);
var abim = m.slice(1).map(function(word) {
return word.split(":");
});
var obj = cities[m[0]] = {};
for (var j=0; j<abim.length; j++) {
var couple = abim[j];
obj[couple[0]] = couple[1];
}
}
console.log(cities);
}, 'text');

Regex like parameter function in Javascript [closed]

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I will do a function with parameters that get a regex and check the field of a form with it.
I have this code:
//The first function handler (no one runs):
field.onblur = function(){
checkField(0, /^([a-z ñáéíóúü]{2,60})$/i, "name", "nameError", "Error in name");
}
//The function:
function checkField(numForm, regex, idField, idError, error){
var form = document.getElementsByTagName("form")[numForm];
var field = form.getElementById(idField);
var spanError = form.getElementById(idError);
//Since here runs, so I think the problem is with the regex
if(!regex.test(idField.value))
spanError.innerHTML = error;
else
spanError.innerHTML = "";
}
What is the proper way to make a function and give it a regex like a parameter?

The regexp is passed fine, these two lines are erranous instead:
var field = form.getElementById(idField);
var spanError = form.getElementById(idError);
getElementById() is a method of document only. You can fix the issue by using id string like below:
var field = form[idField];
var spanError = form[idError];
... or using getElementById(): var field = document.getElementById(idField);
Also this line (unless a typo in the post)
if(!regex.test(idField.value))
should be:
if(!regex.test(field.value))