Teste CodeRabbit 1 #2
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WalkthroughThe change introduces a new file, Changes
Sequence Diagram(s)sequenceDiagram
participant U as User
participant E as solveExpression
participant P as parseExpression
participant S as solveSimplifiedExpr
U->>E: Provide expression string
E->>P: Parse expression into tokens
P->>E: Return token array
E->>E: Process tokens with operator precedence
E->>S: Simplify operations as needed
S->>E: Return intermediate result
E->>U: Return final numeric result
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Esse Pull Request adiciona trecho de código a main antes vazia |
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Actionable comments posted: 1
🧹 Nitpick comments (4)
main.ts (4)
2-2: Avoid using theFunctiontype.
UsingFunctionas a type is discouraged because it can match any callable, leading to unpredictable type-safety. Instead, define a more specific shape, such as:- const operations: { [index: string]: Function } = { + const operations: Record<string, () => number> = {🧰 Tools
🪛 Biome (1.9.4)
[error] 2-2: Don't use 'Function' as a type.
Prefer explicitly define the function shape. This type accepts any function-like value, which can be a common source of bugs.
(lint/complexity/noBannedTypes)
13-24: Validate parsed numbers and throw error objects rather than strings.
IfNumber()fails to parse valid integers, it may yieldNaNwithout explicit handling here. Also, throwing raw strings instead of Error objects reduces debuggability.- throw "Operation Not Supported."; + throw new Error("Operation Not Supported."); - output.push(solve(firstNumber, secondNumber, operator).toString()); + const result = solve(firstNumber, secondNumber, operator); + if (Number.isNaN(result)) { + throw new Error("Parsed an invalid number operation."); + } + output.push(result.toString());
41-41: Use a more compatible regex replacement approach for removing whitespace.
String.prototype.replaceAll()may not be supported in some runtime environments. Consider:- for (const token of expression.replaceAll(" ", "")) { + for (const token of expression.replace(/\s+/g, "")) {
117-117: PreferObject.hasOwn()to avoid prototype pollution hazards.
AccessinghasOwnPropertydirectly from the object can be unreliable if the prototype is modified. Consider one of the following:- } else if (priorities.hasOwnProperty(token)) { + } else if (Object.hasOwn(priorities, token)) {🧰 Tools
🪛 Biome (1.9.4)
[error] 117-117: Do not access Object.prototype method 'hasOwnProperty' from target object.
It's recommended using Object.hasOwn() instead of using Object.hasOwnProperty().
See MDN web docs for more details.(lint/suspicious/noPrototypeBuiltins)
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Configuration used: CodeRabbit UI
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📒 Files selected for processing (1)
main.ts(1 hunks)
🧰 Additional context used
🪛 Biome (1.9.4)
main.ts
[error] 117-117: Do not access Object.prototype method 'hasOwnProperty' from target object.
It's recommended using Object.hasOwn() instead of using Object.hasOwnProperty().
See MDN web docs for more details.
(lint/suspicious/noPrototypeBuiltins)
[error] 2-2: Don't use 'Function' as a type.
Prefer explicitly define the function shape. This type accepts any function-like value, which can be a common source of bugs.
(lint/complexity/noBannedTypes)
🔇 Additional comments (3)
main.ts (3)
26-29: Great use of character code checks.
The implementation provides a straightforward solution for single-byte digits. This looks good.
66-80: Good handling of negative numbers.
Allowing a minus sign when no preceding number or after an operator is nicely implemented. This approach effectively captures unary minus cases.
131-131:Details
❓ Verification inconclusive
Verify if the expression can be empty or invalid, leading to
NaNreturns.
Whenoutputis empty,output.pop()will returnundefined, causingNumber(undefined)to yieldNaN. Confirm thatparseExpressionnever returns an empty token array.
🏁 Script executed:
#!/bin/bash # Check how solveExpression behaves with an empty or invalid expression. echo "Testing empty expression (expect potential NaN or error):" echo "solveExpression('')" | tee /dev/stderrLength of output: 271
Manual verification required: Confirm handling of empty token array
The current test using
solveExpression('')didn't produce any output, which leaves uncertainty about whetherparseExpressionmight ever return an empty token array. At line 131 inmain.ts,return Number(output.pop());would yieldNaNifoutputis empty (sinceoutput.pop()would returnundefined). Please manually verify that either:
parseExpressionguarantees that it never returns an empty array, or- Additional safeguards are in place to handle the empty
outputcase.
| "/": () => firstNumber / secondNumber | ||
| }; | ||
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| return operations[operator](); |
There was a problem hiding this comment.
Handle unrecognized operators before calling the operation function.
If operator is not in the operations map, operations[operator] will be undefined, causing a runtime error. Consider adding a fallback or a check that throws a clear error when the operator is invalid.
- return operations[operator]();
+ if (!operations[operator]) {
+ throw new Error(`Invalid operator: '${operator}'`);
+ }
+ return operations[operator]();📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| return operations[operator](); | |
| if (!operations[operator]) { | |
| throw new Error(`Invalid operator: '${operator}'`); | |
| } | |
| return operations[operator](); |
Docstrings generation was requested by @sabrinaccst. * #2 (comment) The following files were modified: * `main.ts`
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Note Generated docstrings for this pull request at #3 |
Summary by CodeRabbit