Hello, I'm Ganesh Kumar, and I'm building LiveReview — a blast-radius aware AI code review built for your business-critical systems. Star us to help devs discover the project, give it a try, and share your feedback to help improve the product.
Previously, we understood how each value is categorized into a data type.
We actually did some arithmetic calculations with the float and int data types.
Now, let's try to perform some operations on the string data type.
Performing String Concatenation and Replication
We can actually add two string values using the + operator.
'dev' + '.to'
dev.to
Similarly, we can actually create multiple copies of a string value.
('dev' + '.to' + ' ') * 5
'dev.to dev.to dev.to dev.to dev.to '
We can replicate a string using the multiplication operator.
Rules for Performing String Manipulation
We can't add a number directly to a string.
'dev.to' + 90
Traceback (most recent call last):
File "<pyshell#55>", line 1, in <module>
'dev.to' + 90
TypeError: can only concatenate str (not "int") to str
Similarly, we can't perform subtraction or division operations on strings.
'dev.to' - '.to'
Traceback (most recent call last):
File "<pyshell#58>", line 1, in <module>
'dev.to' - '.to'
Traceback (most recent call last):
File "<pyshell#58>", line 1, in <module>
'dev.to' - '.to'
TypeError: unsupported operand type(s) for -: 'str' and 'str'
'dev.to' / '.to'
Traceback (most recent call last):
File "<pyshell#59>", line 1, in <module>
'dev.to' / '.to'
TypeError: unsupported operand type(s) for /: 'str' and 'str'
There are some limitations, which we will get to know as we continue.
What's Next?
We have covered how values are managed and how we can manipulate them by following certain rules.
Now, we can actually combine these concepts into a code snippet.
I'm building LiveReview, a blast-radius aware AI code review built for your business-critical systems.
Instead of presenting every diff with equal emphasis, LiveReview scores each change by blast radius — how far its impact reaches through your call graph — so you can focus attention where it actually matters.
Spend code review effort where business risk is highest — not spread evenly across every diff.
⭐ Star it on GitHub:
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LiveReview
Blast-Radius Aware AI Code Review for Business-Critical Systems
LiveReview: Blast-Radius Aware AI Code Review for Business-Critical Systems
LiveReview is an AI code reviewer that scores every hunk of a diff by blast radius: how far a change reaches through your call graph, how much persistent state it touches, and how well-tested it is. A 3-line change to a shared auth check can outrank a 300-line UI tweak. Your team's attention goes to the highest-risk code first, not spread evenly across every diff.
blast-radius-demo.mp4
LiveReview's Blast Radius & Review Priority scoring, live in the diff viewer.
The exact math, not a black box
Visualize blast radius at a glance
Every factor that feeds the score
Here's the goal:
- A 3-line fix in a function used by 40 other files, that also writes to a database, should score high.
- A 300-line UI change in one file, fully covered by…
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