TILs - Fueling Curiosity, One Insight at a Time

define_singleton_method dynamically adds a method to a single object instance without modifying the class itself. This is useful when you need custom behaviour for an individual object at runtime.

It only modifies the behaviour of a single object in memory at runtime. It does not persist any changes to the database or schema.




#CU6U0R822

PostgreSQL's jsonb type stores structured JSON data efficiently. Unlike json, it's binary-optimized, supports indexing, and queries faster.
🔹 Why Use jsonb?
• Stores structured data in a single column.
• Faster queries (no reparsing needed).
• Supports indexing for quick lookups.
• Flexible schema—great for dynamic data.
• Allows key-value updates without rewriting the whole object.
• Removes duplicate keys automatically.
jsonb gives you NoSQL flexibility with SQL power! 🚀

#postgres

Aliasing in Ruby
Aliasing in Ruby helps to eliminate code repetition by providing an alternative name for an existing method, allowing it to be called in different ways without duplicating the logic.
For example,



#ruby #aliasing

Turbo provides a built-in way to show a loading state on form submission using the turbo_submits_with attribute! 🚀
Instead of manually handling the button's disabled state or adding a spinner, you can simply use:




• When the form is submitted, Turbo automatically
replaces the button text with the value provided in turbo_submits_with (e.g., "Saving...").

• Button is also disabled until the request completes.
• Once the request completes, the button reverts to its original text.
No extra JavaScript needed! 🎉

This is a great way to enhance UX with minimal effort. #Rails #Turbo #TIL

while using form.number_field in rails if we enter a floating point value eg: 23.45 then browser default validation kicks in syaing: Please enter a valid value. The two nearest valid values are 23 & 24 .
In order to allow the floating point value we can add form.number_field, step: "0.01" . Then we can add upto two decimal point vlaue.

#CU6U0R822 #form-tag-helper

to terminate google chrome sessions -> pkill -9 "Google Chrome" .
#terminate-session

Ruby Heredoc Syntax & Rails .squish method:
• Bad - Regular heredoc (<<) keeps all whitespace



• Good - Squiggly heredoc (<<) removes leading whitespace

```
query = <<SQL
SELECT *
FROM users
SQL
# Result: "SELECT \nFROM users\n"
```

• *Best - Rails .squish removes all extra whitespace/newlines



#ruby-heredoc #rails-squish

TimescaleDB

When working with time series data like stock prices, website traffic, or error logs, the volume of data grows rapidly over time. In traditional relational databases like PostgreSQL and SQL, this can lead to slower query performance as the dataset becomes larger.

One alternative is to use NoSQL databases, but they come with their own challenges, such as lack of strong ACID compliance, complex querying, and difficulties in handling structured relational data.

TimescaleDB, which is built on top of PostgreSQL, offers a powerful solution by introducing hypertables - a special type of table optimised for time series data. Hypertables enable faster read and write operations, automatic partitioning, and efficient data compression. Additionally, TimescaleDB provides advanced analytical functions, making it easier to perform complex queries for reporting, trend analysis, and forecasting. This makes it a great choice for applications that require efficient storage and analysis of large-scale time series data.

#databases #time_series_data #timescale_db #postgres

We can't use turbo frame for table rows, because html doesn't allow external tag like turbo frame inside the table.

The workaround this is to just have unique id for element you want to modify and use turbosteam to modify only that element.

#rubyonrails #turbo #turboframes #spa

in ruby https://nil.to|nil.to_i => 0 & https://nil.to|nil.to_f => 0.0
#ruby, #nil-conversion