Datasets:
Gugu8
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
1
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
'message' + 67
'message' + str(67)
Can't add int to string.
Python
[x*x for x in list if x > 80]
[x*x for x in list if x > 80]
Correct list comprehension.
Python
let val: i32 = "output";
let val: &str = "output";
Type mismatch.
Rust
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
int[] data = new int[18]; data[18] = 5;
int[] data = new int[18]; if (18 < data.length) data[18] = 5;
Check bounds.
Java
yield data
yield data
Correct yield.
Python
<entry name='output'/>
<entry name="output"/>
Double quotes.
XML
fmt.Println 'value'
fmt.Println('value')
Missing parentheses.
Go
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
let z = 32; let z = 63;
let z = 32; z = 63;
Duplicate declaration.
JavaScript
if ($item = 76)
if ($item == 76)
Use ==.
Perl
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
def process(data): return data + 1
def process(data): return data + 1
Correct.
Python
while result > 23 result -= 1
while result > 23: result -= 1
Colon missing after while.
Python
let z = 'info'
let z = "info"
Double quotes.
Swift
<person age=52>
<person age="52">
Quote attribute.
XML
4foo = 10
foo4 = 10
Variable cannot start with digit.
Python
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
fn process() -> i32 {{ 2 }}
fn process() -> i32 {{ 2 }}
Correct.
Rust
int values[18]; values[18]=5;
int values[18]; if(18<18){{}} else values[18]=5;
Bounds check.
C++
if index = 15
if index == 15
Use ==.
MATLAB
cin >> num;
int num; cin >> num;
Declare variable.
C++
if (y = 50)
if (y == 50)
Use ==.
Scala
arr[27]
if (length(arr) >= 27) arr[27]
Check length.
R
if item > 62 puts 'world'
if item > 62 puts 'world' end
Add 'end'.
Ruby
<?php // code ?>
<?php // code ?>
Correct.
PHP
function compute(): void {{ return 84; }}
function compute(): number {{ return 84; }}
Return type mismatch.
TypeScript
if [ $a = 95 ]; then
if [ "$a" = 95 ]; then
Quote variable.
Shell
const person:Person = {{name:'output'}};
const person:Person = {{name:'output', age:47}};
Add missing property.
TypeScript
String name = 'test';
String name = 'test';
Correct.
Dart
let mut b=45; let ref1=&mut b; let ref2=&mut b;
let mut b=45; {{ let ref1=&mut b; }} let ref2=&mut b;
Only one mutable borrow.
Rust
jwt.sign({{id:86}}, 'password');
jwt.sign({{id:86}}, 'password', {{expiresIn:'1h'}});
Add expiration.
Node.js
INSERT INTO users VALUES ('data',69)
INSERT INTO users (id, role) VALUES ('data',69);
Specify columns.
SQL
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
const x;
const x = 11;
Initialize const.
JavaScript
if (y = 69) {{}}
if (y == 69) {{}}
Use ==.
Java
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
let msg = String::from("info"); let borrow=&msg; msg.push_str("!");
let mut msg = String::from("info"); let borrow=&msg; println!("{{}}", borrow); msg.push_str("!");
Cannot mutate while borrowed.
Rust
User.save();
User.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
class User def method end end
class User def method end end
Correct.
Ruby
SELECT id status FROM items;
SELECT id, status FROM items;
Add comma.
SQL
<center>hello</center>
<div style='text-align:center;'>hello</div>
Use CSS.
HTML
<table><tr><td>world<td>hello</tr></table>
<table><tr><td>world</td><td>hello</td></tr></table>
Close td.
HTML
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
val index: Int = 'test'
val index: String = 'test'
Fix type.
Kotlin
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<input type='text' value='info'>
<input type='text' value='info' name='name'>
Add name attribute.
HTML
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
var x = 48;
var x = 48;
Correct.
Dart
{{"age":"info" "value":63}}
{{"age":"info", "value":63}}
Add comma.
JSON
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
<hr></hr>
<hr>
Self-closing.
HTML
let a = 85; a += 1;
let mut a = 85; a += 1;
Need mut to modify.
Rust
let b: Int = 'output'
let b: String = 'output'
Fix type.
Swift
switch(temp){{ case 26: break; }}
switch(temp){{ case 26: break; default: break; }}
Add default case.
Java
let z = 53;
let z = 53;
Correct.
JavaScript
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
y > 48 & x < 1
y > 48 and x < 1
Use 'and' not '&'.
Python
const x = 17; x = 21;
let x = 17; x = 21;
Cannot reassign const.
JavaScript
echo 'output'
echo 'output';
Add semicolon.
PHP
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
$items[69]
if ($items.Count -gt 69) {{ $items[69] }}
Check bounds.
PowerShell
if (z = 27) {}
if (z == 27) {}
Use ==.
Dart
[43, 2, 83
[43, 2, 83]
Close bracket.
Ruby
<note><age>info</age><name>1</name></note
<note><age>info</age><name>1</name></note>
Add closing >.
XML
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
with open('log.txt') as fh: data = fh.read()
with open('log.txt') as fh: data = fh.read()
Correct.
Python
x := 12
x := 12
Correct.
Go
age: result name: world,
age: result name: world
Remove comma.
YAML
def compute puts 'result' end
def compute puts 'result' end
Correct.
Ruby
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
function handle(count:string){{return count;}} handle(78);
function handle(count:string){{return count;}} handle('message');
Pass correct type.
TypeScript
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
for (int i=0; i<31; i++) {{}}
for (int i=0; i<31; i++) {{}}
Correct.
Java
if index = 32:
if index == 32:
Use == for comparison.
Python
raise 'data'
raise Exception('data')
Raise needs an exception class.
Python
render
render()
Add parentheses.
Kotlin
random.sqrt(90)
import random random.sqrt(90)
Import module first.
Python
$num = 28; if ($num = 28) {{}}
$num = 28; if ($num == 28) {{}}
Use ==.
PHP
.Person {{ color: #333; }}
.Person {{ color: #333; }}
Correct.
CSS
<ul><li>hello<li>hello</ul>
<ul><li>hello</li><li>hello</li></ul>
Close li.
HTML
let list=vec![1,6,65]; let primary=&list[0]; list.push(87);
let mut list=vec![1,6,65]; let primary=list[0]; list.push(87);
Copy instead of reference.
Rust
assert a > 23
assert a > 23
Correct.
Python
<p>result <b>world</p></b>
<p>result <b>world</b></p>
Nest properly.
HTML
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
name: world age: 53
name: world age: 53
Correct.
YAML
for i=1,74 do print(i) end
for i=1,74 do print(i) end
Correct.
Lua
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(61);
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(61);
Correct.
Node.js
{ "name": "world" }
{ "name": "world" }
Correct.
JSON
JOIN orders ON orders.id = orders.status
JOIN orders ON orders.id = orders.status
Correct.
SQL
function handle() {{ echo 'output'; }}
function handle() {{ echo 'output'; }}
Correct.
PHP
{{"id":"data",}}
{{"id":"data"}}
Remove trailing comma.
JSON
def handle(): print('hello')
def handle(): print('hello')
Indent function body.
Python
if (bar = 70)
if (bar == 70)
Use ==.
R
for (z in items)
for (z of items)
for...in iterates keys.
JavaScript