add possibility to convert string to number

[vasiliyk]

We need possibility to convert string to number, it is basic feature in programing, and there are a lot of awful workarounds on forums to overcome lack of such conversion, so we all need it urgently.

Consider following example:
assuming that there is a need to display a special message if the user has selected 20 or more items with the word 'orange' in their title:

{% assign total_orange_items = '0' %}
{% for item in cart.items %}
    {% if item.title contains "orange" %}
        {% capture temp_total %}{{ total_orange_items | plus:item.quantity }}{% endcapture %}
        {% assign total_orange_items = temp_total %}
    {% endif %}
{% endfor %}
{% if total_orange_items >= 20 %}
   
blah blah blah
{% endif %}

Another code:

{% capture difference %}{{ total_orange_items | minus:20 }}{% endcapture %}
{% unless difference contains '-' %}
   
blah blah blah
{% endunless %}

[nhocki]

Hmm, you should be able to do this. Liquid should parse numbers as numbers (here.

Also the math filters convert the strings to numbers (here)

If you still need some personalised parsing, you could easily create a filter for that.

[asumaran]

I achieved this using the 'times' filter, this fix the integer variables that turned to string after manipulating and capture
Here's the code I used.

{% assign color_counter = 0 %}
{% for variant in product.variants %}
{% assign img_index = color_counter | times: 1 %}
<img src="{{ product.images[img_index] | product_img_url: 'grande'  }}">
{% capture color_counter %}{{ color_counter | plus: 1 }}{% endcapture %}
 {% endfor %}

Anyway, would be great if a filter is available to transform string to integer or a capture_integer method.

[phoet]

@asumaran when using assign you should actually have a number, not a string. using capture will store the string that would get rendered. if you want to increment the counter, just do a {% assign color_counter = color_counter | plus: 1 %}

[asumaran]

@phoet Yes, but the color_counter variable turns into string when is captured after the plus operation. So that's why I use the times filter to ensure the img_index is numeric when the loop starts again.

Update: I just tried your method and seems works fine too, however your method is more explicitly, I'll consider it for the next time.

[phoet]

@asumaran so i think that you can close the issue

[fw42]

Closing for now. Please re-open if still an issue.

[SzieberthAdam]

Generally, do a | plus: 0.