can i use in_array () in Shopify - shopify

I am new To Shopify ! i am trying to something like,i want to check that,the ID which i put on Textbox is in array or not !
here is my Product.Liquid
{% if settings.make_an_offer %}
{% for id in product.id %}
{% include 'pricewaiter' %}
{% endfor %}
{% endif %}
in above code,i need to check that settings.make_an_offer is in this array product.id or not..
make_an_offer this is an ID of my Textbox
so how can i do this?
any help please?

Place it like this :
{% for id in product.id %}
{% if settings.make_an_offer === id %}
{% include 'pricewaiter' %}
{% endif %}
{% endfor %}

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Checking if no compare_price exists in Shopify Liquid

I want to check if there's no compare price, and I cannot get any of the following to work in Shopify:
{% if price > compare_at_price %}
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You are missing the object here to get its attributes:
{% if product.price > product.compare_at_price %}
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{% if product.compare_at_price %}
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https://shopify.dev/docs/themes/liquid/reference/objects/product

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I tried to figure out how to write the code to hide these products in a better way. I tried product.vendor like below but when I search for those products individually they are not hidden. The code:
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Is it possible to see if an item is already in the cart and add a class to div on the product page?
I was hoping something like:
{% for line_item in cart.items %}
{% if line_item.title = product.title %}
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would do this: {% if line_item.title = product.title %} but Shopify doesn't like it. Ideas?
line_item.title is different than product.title. Because line_item.title is the variant of the product which is in the cart.
Say product title is Shirt
And the line_item.title will be Shirt-Red(red variant)
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Try something like this:
{% assign in_cart = false %}
{% for item in cart.items %}
{% if item.product.handle == product.handle %}
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Are you looking for a specific product title, or any product title that is duplicated? If you are comparing against a given product title, perhaps try something like this:
{% assign found_duplicate = false %}
{% for p in products %}
{% if p.title == product.title %}
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{% endif %}
{% endfor %}
{% if found_duplicate == true %}
...
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shopify pass a variable to settings

i want to do something like this in Shopify:
{% for i in (0..10) %}
{% capture slide %}slide{{i}}{% endcapture %}
{{ settings.slide }}//i need the value of this one
// i want to get the values for settings.slide1, settings.slide2 etc
{% endfor %}
Another example:
{% for i in (0..10) %}
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This is a simplified version of what im trying to achieve.
Thanks
Try this:
{% for i in (0..10) %}
{% assign current_slide = 'slide' | append: i %}
{{ settings[current_slide] }}
{% endfor %}