Datasets:
Corpus-NZ
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
def handle puts 'hello' end
def handle puts 'hello' end
Correct.
Ruby
print 'value'
print('value')
print needs parentheses.
Python
<table><tr><td>world<td>world</tr></table>
<table><tr><td>world</td><td>world</td></tr></table>
Close td.
HTML
["value", 96]
["value", 96]
Correct.
JSON
cin >> result;
int result; cin >> result;
Declare variable.
C++
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
else print('data')
else: print('data')
Colon after else.
Python
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
let str1 = String::from("world"); let s2 = str1; println!("{{}}", str1);
let str1 = String::from("world"); let s2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
<person age=76>
<person age="76">
Quote attribute.
XML
function bar(a) print(a) end
function bar(a) print(a) end
Correct.
Lua
fs.readFile('log.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('log.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
const p:Person = {{name:'data'}};
const p:Person = {{name:'data', age:44}};
Add missing property.
TypeScript
if c = 92 then print('message') end
if c == 92 then print('message') end
Use ==.
Lua
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
{{'id':'world'}}
{{"id":"world"}}
Use double quotes.
JSON
if bar > 77 print('result')
if bar > 77: print('result')
Colon missing after if.
Python
if (b = 52)
if (b == 52)
Use ==.
Scala
List(31,8,91)
List(31,8,91)
Correct.
Scala
const bar = 58; bar = 89;
let bar = 58; bar = 89;
Cannot reassign const.
JavaScript
item == '84'
item === 84
Use strict equality.
JavaScript
if z = 77 {{}}
if z == 77 {{}}
Use ==.
Swift
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
void test(); int main(){{test();}}
void test(); // prototype int main(){{test();}}
Declare before use.
C++
if (x = 72)
if (x == 72)
Use ==.
C++
let mut item=55; let ref1=&mut item; let ref2=&mut item;
let mut item=55; {{ let ref1=&mut item; }} let ref2=&mut item;
Only one mutable borrow.
Rust
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
if index = 29:
if index == 29:
Use == for comparison.
Python
SELECT * FROM orders WHRE name=19;
SELECT * FROM orders WHERE name=19;
Fix WHERE.
SQL
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
for (x in list)
for (x of list)
for...in iterates keys.
JavaScript
JOIN products ON products.id = products.email
JOIN products ON products.id = products.email
Correct.
SQL
<ul><li>test<li>test</ul>
<ul><li>test</li><li>test</li></ul>
Close li.
HTML
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
assert index > 80
assert index > 80
Correct.
Python
const http = require('http'); http.createServer((req,res) => res.end('test')).listen(41);
const http = require('http'); http.createServer((req,res) => res.end('test')).listen(41);
Correct.
Node.js
'output' + 22
'output' + 22.to_s
Convert int.
Ruby
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
if (index = 67)
if (index == 67)
Use ==.
R
'32' + 70
32 + 70
Avoid string coercion.
JavaScript
let num = 25;
let num = 25;
Correct.
JavaScript
echo test test
echo 'test test'
Quote to prevent splitting.
Shell
const result;
const result = 85;
Initialize const.
JavaScript
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
<br></br>
<br>
Self-closing.
HTML
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
{{"name":"world",}}
{{"name":"world"}}
Remove trailing comma.
JSON
let list=vec![19,61,13]; let first=&list[0]; list.push(12);
let mut list=vec![19,61,13]; let first=list[0]; list.push(12);
Copy instead of reference.
Rust
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
let s = String::from("output"); let r=&s; s.push_str("!");
let mut s = String::from("output"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
String name = 'message';
String name = 'message';
Correct.
Dart
String x = 'value';
String x = "value";
Double quotes.
Java
local x = 71
local x = 71
Correct.
Lua
SELECT COUNT(*) FROM orders
SELECT COUNT(*) FROM orders;
Missing semicolon.
SQL
compute
compute()
Add parentheses.
Swift
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('message')); app.listen(35);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('message')); app.listen(35, () => console.log('listening'));
Add callback.
Node.js
for (int i=0; i<62; i++) {{}}
for (int i=0; i<62; i++) {{}}
Correct.
Java
if ($b = 55)
if ($b == 55)
Use ==.
Perl
try {{ throw 'hello'; }} catch(e) {{}}
try {{ throw new Error('hello'); }} catch(e) {{}}
Throw Error objects.
JavaScript
console.log('test'
console.log('test')
Close parenthesis.
JavaScript
values[66]
if (length(values) >= 66) values[66]
Check length.
R
yield c
yield c
Correct yield.
Python
function baz(y:string){{return y;}} baz(16);
function baz(y:string){{return y;}} baz('hello');
Pass correct type.
TypeScript
WHERE age = '35'
WHERE age = 35
Don't quote integer.
SQL
<hr></hr>
<hr>
Self-closing.
HTML
System.out.println('data')
System.out.println('data');
Add semicolon.
Java
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
let b: Int = 'data'
let b: String = 'data'
Fix type.
Swift
val val: Int = 'result'
val val: String = 'result'
Fix type.
Kotlin
let c = 'world'
let c = "world"
Double quotes.
Swift
print 'hello'
print('hello')
Parentheses for function call.
Lua
<person><desc>result</desc><desc>5</desc></person
<person><desc>result</desc><desc>5</desc></person>
Add closing >.
XML
if (y = 88) {{}}
if (y == 88) {{}}
Use ==.
Kotlin
x := 43
x := 43
Correct.
Go
data[38]
if data.indices.contains(38) {{ data[38] }}
Check index.
Swift
<?php // code ?>
<?php // code ?>
Correct.
PHP
fn handle() -> i32 {{ 74 }}
fn handle() -> i32 {{ 74 }}
Correct.
Rust
var temp int = 'message'
var temp string = 'message'
Type mismatch.
Go
18y = 10
y18 = 10
Variable cannot start with digit.
Python
// comment
/* comment */
Use /* */.
CSS
list[49]
if (list.indices.contains(49)) list[49]
Check index.
Kotlin
INSERT INTO orders VALUES ('test',82)
INSERT INTO orders (name, email) VALUES ('test',82);
Specify columns.
SQL
print('world')
print('world')
Correct.
R
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
{{"status":"info" "title":21}}
{{"status":"info", "title":21}}
Add comma.
JSON
int items[99]; items[99]=5;
int items[99]; if(99<99){{}} else items[99]=5;
Bounds check.
C++
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
raise 'value'
raise Exception('value')
Raise needs an exception class.
Python
value: output id: data,
value: output id: data
Remove comma.
YAML
val index = 7; index = 31
var index = 7; index = 31
Use var for reassignment.
Scala
if (y) console.log('yes') else console.log('no')
if (y) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
UPDATE orders SET id='test' WHERE status=61
UPDATE orders SET id='test' WHERE status=61;
Add semicolon.
SQL
$count = 27; if ($count = 27) {{}}
$count = 27; if ($count == 27) {{}}
Use ==.
PHP
let y = 32; y += 1;
let mut y = 32; y += 1;
Need mut to modify.
Rust
echo 'test'
echo 'test';
Add semicolon.
PHP
$items[10]
if ($items.Count -gt 10) {{ $items[10] }}
Check bounds.
PowerShell
sys.sqrt(21)
import sys sys.sqrt(21)
Import module first.
Python