[FIXED] How to include a integer while throwing a failure exception in OCaml

Issue

I have this function

let f = function
| 1 -> "a"
| 2 -> "b"
| _ -> failwith "Argument should be less than 3 and more than 0 but it was found to be x"

How do I set the value of x here equal to the function's input?

Solution

You can use the standard library function sprintf present in the Printf module.

| x -> failwith (Printf.sprintf "Argument should be ... but it was %d" x)

Although, I would recommend you to use invalid_arg instead of failwith since you are throwing the exception due to an invalid argument.

Check out this page of the OCaml documentation.

Answered By - kodwx

Answer Checked By - Candace Johnson (PHPFixing Volunteer)

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[FIXED] How to check if a particular file already exists by using an uploaded file to find a match in PHP

Issue

giphy.com, during an upload, somehow recognizes if a particular GIF animation has already been uploaded to their servers. and I was wondering how I can replicate that using PHP in a very efficient (low-server intensive) manner?

The only way I can think of doing this is by looping between all the files on my server (which I would think would be a highly server intensive task) and trying to find a match (and by match, I don't mean filename; I mean if the exact same gif was uploaded (the exact file regardless of the filename)).

But I'm not too sure of what particular PHP functions I'd have to use.

Solution

Use a database. At each upload you calculate a md5 hash of the file ( using md5_file ) and you store that in the database. Looking up the database to see if the hash already exists will be very fast.

Answered By - Lorenz Meyer

Answer Checked By - Candace Johnson (PHPFixing Volunteer)

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[FIXED] Why keyword `match` in Python 3.10 can be as a variable or function name?

Issue

I don't fully understand why the keyword match can be used as a variable or function name, unlike other keywords if, while, etc.?

>>> match "abc":
...     case "abc":
...         print('Hello!')
...     
Hello!
>>> from re import match
>>> match('A', 'A Something A')
<re.Match object; span=(0, 1), match='A'>
>>> match = '????'
>>> match
'????'
>>> case = 'something'
>>> case
'something'

Solution

Per PEP 622, match and case are being added as "soft keywords", so they will remain valid identifiers:

This PEP is fully backwards compatible: the match and case keywords are proposed to be (and stay!) soft keywords, so their use as variable, function, class, module or attribute names is not impeded at all.

Answered By - Brian

Answer Checked By - Willingham (PHPFixing Volunteer)

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[FIXED] How to print pattern in liquid shopify

Issue

I'm trying to create pattern like this https://prnt.sc/1skp2s0 I'm trying it with liquid code

{% for i in (1..10) %}
{% for j in (1..10) %}
{{i}}
{% endfor %}

{% assign i=i | plus : '1' %} 
<br>

{% endfor %}

Solution

Use variable and
tag like this, it will help you to print the result like this

{% assign j = 1 %}
{% for i in (1..10) %}
  {% for j in (1..j) %}
    {{j}}
  {% endfor %}
  {% assign j = j | plus: 1 %}
  <br/>
{% endfor %}

Answered By - Onkar

Answer Checked By - Pedro (PHPFixing Volunteer)

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