United Kingdom – Can I count on credit cards in London or do I need to get currency and where?

We were twice in the UK in 2019, the first time for three weeks in February in London, Cambridge and Glasgow, then another week in December in Cambridge. TL; DR: We lived easily with credit cards and we never got any British money.

"Contactless" credit cards are widely accepted in stores and markets and on public transport. Transport for London transport (tube, bus, DLR, London Overground) accepts contactless cards and you can (if you wish) avoid getting a TfL Oyster card. Outside of flea markets, you should have no trouble accepting a credit card.

If you want change, your best bet is to use a debit card at an ATM in the UK. but not at an airport, after ensuring that the card has been issued by a bank that does not charge ATM fees abroad. Do not use machines that charge fees and apply higher than normal exchange rates. Travelex ATMs are particularly unwanted in this regard, as high fees and unreasonable exchange rates are the order of the day. Every ATM I have seen at LHR, LGW and STN was operated by Travelex. If an ATM or bank charges per transaction, a larger withdrawal is cheaper per dollar, but you have to weigh the increased risk of carrying a bigger pile of money.

Getting British currency in the US before departure is not much better; wait until you arrive in the UK and leave the airport, then use a local ATM.

programming challenge – Credit card form using RXjs

I am trying to improve my skills and I would like to work to avoid bad practices and mistakes.

Can someone hover over my code and indicate what should have been implemented more efficiently or in a more compact way?

I am a beginner RXJS and I would appreciate if you gave a hint on how the code was organized (pipes, eventListeners and how I did it)

As you can see in my code, I have three types of events: click, keydown and change.

const inputs$ = merge(

  const change$ = merge(

const general = merge(

Click on: I used a general channel for all click events, as their functionality is quite similar and based on my basic click event, I created another channel for cvv input element.
I don't know if the approach of implementing my focus on a certain map field is good practice because I use a lot of regular expressions and recursive functions.

like this one:

if (!(/^(card-)/i.test(eventGroup))) {

    clickEvent = {
      type: e.type,
      surface: 'away',
      overlay: {
        front: overlay,
        back: overlayBack
      event: e

Down key: Here I seem to have separate event handlers for each entry, as their functionality is different in formatting and displaying data.
At first I thought I would make common rules, then I would put specific pipes above them for everyone input. But then, I used common pipe operators for each entry, because when I based specific rules on my basic pipe for the event, I invoked as many times as many entries as I had.

const refactorCardEvent = (input: string) => map( event => {
  const e: ITypingEvent = event;

  const target = e.target;
  const eventGroup = findWrapper(target, 'data', 'picker');

  const refactored: ITypingEvent = {
    type: 'typing',
    lastKey: e.key,
    step: state(input).value.length,

  return refactored;


// Card number typing event
export const numberTyping$ = fromEvent(findElementByDataValue(form, { key: 'picker', value: 'card-number' }), 'keydown')
    filterKeys('digits', 16, 'number'),
    updatingState('^(0-9)$', 'number'),

Change: Here are just a few cards, but if I did something wrong, I would appreciate your advice and experience.

Very often I have had a problem with highlighting certain variables in the code due to the types. It seems to me that I am using appropriate types, but it says that the event is missing something, for example: KeyBoardEvent. Lots of red warnings in the code. So you also have this problem or what have I done wrong types of attribution?

For overlay elements, would it be better to create it in one click or have it in code like I did?

What is the best practice for filtering keys and separating them from ones like Control, Alt and others.

The way I implemented it:

const filterKeys = (type: string, length: number, relatedState: string) => pipe(

  map(event => {
    let b: boolean;

    if (type === 'digits') {
      const t = new RegExp(/(bDigitS+)/, 'i');

      b = /^(bTabb)/i.test(event.code) || t.test(event.code) || /^(bBackspaceb)/i.test(event.code);

    } else if (type === 'keys') {
      const t = new RegExp(/(bKeyS+)/, 'i');

      b = /^(bSpaceb)/i.test(event.code) || /^(bTabb)/i.test(event.code) || t.test(event.code) || /^(bBackspaceb)/i.test(event.code);


    const l = (/^(bBackspaceb)/i.test(event.code) && state(relatedState).value.length !== 0) || (state(relatedState).value.length < length && !/^(bBackspaceb)/i.test(event.code));

    return (b && l) ? { success: true, event } : { success: false };


  filter(event => event.success),

  map(event => event.event)


Any advice on engineering, structure or anything, is highly appreciated

The full code is here: Credit card form

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magento2 – Remove PayPal and down payments and credit cards from the checkout?

After upgrading to Magento 2.3.2 I now have not only the PayPal Express button, but a few extra buttons for credit card payments and a deposit button (https://i.imgur.com/XinNjX3.png).

Is there a way to only display the PayPal Express button? I tried to hide it from the PayPal options in the admin, but it doesn't work … it hides all the PayPal buttons or shows them all.

Ideas? Thank you!

budget – Free credit card recommended for Americans traveling to the UK

Which American credit card do you recommend to buy things in London and pay no fees?

I'm American and I'm traveling to the UK in the spring of 2020 to visit London. My trip will be one week.

I'm leaning towards Capital One's venture capital rewards because there are no dollar fees for the first year and $ 95 thereafter.

I currently have no credit card debt and I intend to pay off my credit card immediately upon my return to America.

exchange – Pay in local currency or dollars with a credit card in Peru?

Until now, I have only seen the credit card charges displayed on the POS terminal under the currency of a country.

However, in Peru, many terminals display both the local soles and the usual currency of my card, Canadian dollars and the seller asks me in which currency I prefer to pay, which I can choose.

Now, until this trip, I expected that the credit card companies would largely benefit from my fees, additional fees and perhaps an exchange rate less than ideal. I guess it still is.

In this case, my question is: will these fees and the final cost to me be lower if I pay in local soles or if I pay in Canadian dollars? Do the CAD / Soles amount displayed, and therefore an implicit exchange rate, tell me the whole story? Suppose, if you are not sure about the CAD $ details, the choice is between USD $ or soles. As well if you have experience with a similar system of choosing to pay in foreign currency in a country other than Peru, I assume that credit cards work in a relatively similar way from one country to another. 39; another. But I'm really looking for people who have been there and who did the math on their return.

In other words – better to pay in soles / better to pay in dollars / about the same thing?

Note: the seller is not the one who offers me a choice between say 70 soles or 25 CAD and therefore the exchange rate, at that time, they do not even know where I come from. It is the VISA terminal itself that recognizes my card. So, whatever the advantages or not of paying in local currency, it is NOT dictated by the choice of the seller's exchange rate (which, yes, I suppose it would be worse than that of VISA).