Develop Reference

easy way to multiply a value to successive substrings in javascript

Good morning, sorry for my poor English.
I'm a neophyte and I'm trying to create a javascript program that, given a string in input, if it finds inside defined substrings it returns a value to each substring and returns the sum of the values ​​found as output. Everything ok here. But I'm finding it difficult to manage the case where in front of the substring that I'm looking for, there's for example "2x" which means that the value of the next substring (or of all subsequent substring) is to be multiplied for 2. How can I write in simple code this exception?
Example:
A1 = 1
M1 = 1
input description = A1-M1
output = 2
input descritpion = 2 x A1-M1
output = 4
Thanks in advance

For more comprehesion, you can find my code below:
let str_description = "2 x A1-M1";
var time_mont = [];
var time_cloa = [];
if(str_description.includes("A1")){
time_mont.push (0.62);
} else {
time_mont.push (0);
}
if(str_description.includes("M1")){
time_mont.push (0.6);
} else {
time_mont.push (0);
}
How can I manage "2 x " subtring?

Collection Boolean isn't being set to false - Meteor

So in short, the app that i'm developing is a bus timetable app using Meteor, as a practice project.
inside my body.js, I have an interval that runs every second, to fetch the current time and compare to items in a collection.
To show relevant times, I have added an isActive boolean, whenever the current time = sartTime of the collection, it sets it to true, and that is working fine.
But when I do the same thing for endTime and try to set it to false, so I can hide that timeslot, it just doesn't work. Even consoles don't show up. What am I missing? I have recently just started doing meteor, so excuse the redundancies.
Worth noting that the times that I'm comparing to are times imported from an CSV file, so they have to be in the 00:00 AM/PM format.
Thank you guys so much for your time.
Body.js code:
Template.Body.onCreated(function appBodyOnCreated() {
Meteor.setInterval(() => {
var h = (new Date()).getHours();
const m = ((new Date()).getMinutes() <10?'0':'') + ((new Date()).getMinutes());
var ampm = h >= 12 ? ' PM' : ' AM';
ampmReac.set(ampm);
if (h > 12) {
h -= 12;
} else if (h === 0) {
h = 12;
}
const timeAsAString = `${h}${m}`;
const timeAsAStringFormat = `${h}:${m}`;
whatTimeIsItString.set(timeAsAStringFormat + ampm); // convert to a string
const timeAsANumber = parseInt(timeAsAString); // convert to a number
whatTimeIsIt.set(timeAsANumber); // update our reactive variable
if (Timetables.findOne({TimeStart: whatTimeIsItString.get()}).TimeStart == whatTimeIsItString.get())
{
var nowTimetable = Timetables.findOne({TimeStart: whatTimeIsItString.get() });
Timetables.update({_id : nowTimetable._id },{$set:{isActive : true}});
console.log('I am inside the START statement');
}
else if (Timetables.findOne({TimeEnd: whatTimeIsItString.get()}).TimeEnd == whatTimeIsItString.get())
{
var nowTimetable = Timetables.findOne({TimeEnd: whatTimeIsItString.get() });
Timetables.update({_id : nowTimetable._id },{$set:{isActive : false}});
console.log('I am inside the END statement');
}
}, 1000); //reactivate this function every second
});
})

Very probably it is just that your if / else blocks does what you ask it:
It tries to find a document in Timetables, with specified TimeStart. If so, it makes this document as "active".
If no document is previously found, i.e. there is no timeslot which TimeStart is equal to current time, then it tries to find a document with specified TimeEnd.
But your else if block is executed only if the previous if block does not find anything.
Therefore if you have a next timeslot which starts when your current timeslot ends, your if block gets executed for that next timeslot, but the else if block is never executed to de-activate your current timeslot.
An easy solution would be to transform your else if block in an independent if block, so that it is tested whether the previous one (i.e. TimeStart) finds something or not.

Ok so I got it to work eventually. My problem was that it was never going to the second IF statement.
What I have done is set up a whole new Meteor.interval(() >) function, and placed that second IF in there, as is.
I think the problem was that it was it checks the first IF statement and gets stuck there, no matter what the outcome of the parameters is.

How can I add leading zero if my value is less than 10? Using node JS

how can I add leading zero to my column when my column's value is less than 10?
here is my code:
db.all("SELECT * FROM tablename WHERE x= ? ORDER BY MEMBER_CODE DESC LIMIT 1",[x], function(err,rows) {
if(rows.length == 0)
{
var mcode = 0;
}
else
{
var mcode = rows[0].MEMBER_CODE;
if (mcode < 10) {
mcode = "0"+mcode;
console.log(mcode);
}
} db.run("INSERT INTO f11 MEMBER_CODE VALUES $MEMBER_CODE",{ $MEMBER_CODE : +mcode+1});
From the code, MEMBER CODE increments every input. I tried that code but it fails. the output of console.log(mcode) which appends zero less than 10 is the one i want but it doesnt append zero anymore when the data will be processed on the database
console.log(mcode) outputs 01,02,03,04,05,06,...,10++
BUT
+mcode+1 outputs 1,2,3,4,5,6,...,10++
Please bear with my question and my explanation. Thanks

I want to obtain a certain part of text from a large webpage using Javascript, how do I?

There is a certain webpage which randomly generates a number, for example "Frequency : 21". I am trying to create a script which takes the number, 21, and compares it to another variable, then to an if else function. Basically, I've completed most of it, but I can't obtain the number 21. And since it is random, I can't put in a fixed value.
Can anyone help me out?
My code goes like:
setTimeout(MyFunction,5000)
function MyFunction(level,legmin) {
var level = x
var legmin = 49
if (level <= legmin) {
location.reload(true)
}
else {
alert("Met requirements.")
}
where the address of the text I want is:
html>body>div#container>div#contentContainer>div#content>
div#scroll>div#scrollContent>div>div>div#pkmnappear>form>p (x in the code above).

A quick-n-dirty solution without regex.
var lookFor = "Frequency : ";
var text = document.querySelector("#pkmnappear>form>p").textContent;
var level = text.substr(text.indexOf(lookFor) + lookFor.length).split(" ")[0];
This assumes the number will be followed by a space

A string of form nnnn-nnnn is displayed in a spreadsheet as a date or otherwise incorrectly

I have a script I have been using in my test environment to programmically create a tracking number by parsing the year from timestamp and padding the response index.
function setTrackingNumber(ss, lastRowInx, createDateColumn) //This block generates and stores a tracking number in Column AU on the backend
{
var padTrackNo = "" + lastRowInx;
var trackSize = 4;
var trackingNumberColumn = createDateColumn-3; //trackingNumberColumn is currently in AU (Column 47) Calculating using it's relative position to createDateColumn Position
if (ss.getRange(lastRowInx, trackingNumberColumn).getValue() == "") // so that subsequent edits to Google Form don't overwrite original tracking number
{
if (padTrackNo > trackSize)
{
var padTrackNo = pad(padTrackNo, trackSize);
}
else {} //do nothing
var shortYear = setShortYear(ss, lastRowInx, createDateColumn);
var trackingNumber = shortYear + "-" + padTrackNo;
var createTrackingNumber = ss.getRange(lastRowInx, trackingNumberColumn);
createTrackingNumber.setValue(trackingNumber);
}
else {} //should do nothing
return;
}//This is the end of the setTrackingNumber function
function setShortYear(ss, lastRowInx, createDateColumn)
{
var newCreateDate = ss.getRange(lastRowInx,createDateColumn).getValue();
var strDate = "" + newCreateDate;
var splitDate = strDate.split(" ");
var trimYear = splitDate[3];
var shortYear = trimYear;
return shortYear;
}//This is the end of the shortYear function
function pad(padTrackNo, trackSize)
{
while (padTrackNo.length < trackSize)
{
padTrackNo = "0"+padTrackNo;
}
return padTrackNo;
}//This is the end of pad function
That gets me test result which is as expected ex. 2016-0005. However when we added it to another production sheet it seemed to work with test data and then production data showed up like a date 3/1/2016. production result - first cell.
I thought it must just be formatting the string as a date because of the numbers so I tried formatted the column as plain text but that just changed the date to a plain text version of the date.
I thought this might be similar to needing to specify the format like I did in this question Appending initial timestamp from Google Form to end of record in order to permanently store create date onFormSubmit at #SandyGood 's suggestion so I tried setting the number format as [0000-0000] by changing
createTrackingNumber.setValue(trackingNumber);
to
createTrackingNumber.setValue(trackingNumber).setNumberFormat("0000-0000");
which resulted in the [production result - second cell] which again doesn't match the expected result.
Oddly, some submissions seem to work just fine like [production result - third cell]. Over the past 3 days and approximately 10 records it has been fine, then hinky, then fine, they hinky, then fine again. I am not really sure what else to try to debug this odd behaviour.
Note: I had to parse the date as a string as I was having trouble getting it to parse the date correctly from the create date which is taken from initial timestamp.

To my understanding, "2016-0005" is not a number but a string, so the cell containing it should be formatted as plain text. With a script, this can be done by
range.setNumberFormat('#STRING#')
(source), and this must be done before you set the value to the cell. Like this:
createTrackingNumber.setNumberFormat('#STRING#').setValue(trackingNumber);