MouseBall54

Mechanical engineering background, now working in computer vision and AI.

Recent posts

JavaScript ์˜ค๋ฅ˜ โ€˜Uncaught ReferenceError: is not definedโ€™ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

โ€˜Uncaught ReferenceError: โ€ฆ is not definedโ€™๋Š” JavaScript์—์„œ ๋ณ€์ˆ˜๋‚˜ ํ•จ์ˆ˜๊ฐ€ ์„ ์–ธ๋˜์ง€ ์•Š์•˜๊ฑฐ๋‚˜ ์ ‘๊ทผํ•  ์ˆ˜ ์—†๋Š” ์Šค์ฝ”ํ”„์— ์žˆ์„ ๋•Œ ๋ฐœ์ƒํ•˜๋Š” ํ”ํ•œ ์˜ค๋ฅ˜์ž…๋‹ˆ๋‹ค. ์›์ธ๊ณผ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

JavaScript โ€˜Maximum call stack size exceededโ€™ ์˜ค๋ฅ˜ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

JavaScript์—์„œ โ€˜Uncaught RangeError: Maximum call stack size exceededโ€™ ์˜ค๋ฅ˜๊ฐ€ ๋ฐœ์ƒํ•˜๋Š” ์›์ธ์ธ ๋ฌดํ•œ ์žฌ๊ท€๋ฅผ ํŒŒ์•…ํ•˜๊ณ , ํ•จ์ˆ˜์— ์˜ฌ๋ฐ”๋ฅธ ์ข…๋ฃŒ ์กฐ๊ฑด์„ ๊ตฌํ˜„ํ•˜์—ฌ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

JavaScript TypeError: Cannot read properties of null ์˜ค๋ฅ˜ ํ•ด๊ฒฐํ•˜๊ธฐ

2 minute read

JavaScript ๊ฐœ๋ฐœ์ž๋ผ๋ฉด ๋ˆ„๊ตฌ๋‚˜ ํ•œ ๋ฒˆ์ฏค ๋งˆ์ฃผ์น˜๋Š” โ€˜Cannot read properties of nullโ€™ ์˜ค๋ฅ˜. ์ด ์˜ค๋ฅ˜์˜ ์›์ธ์„ ๋ช…ํ™•ํžˆ ์ดํ•ดํ•˜๊ณ , DOM ๋กœ๋”ฉ ์‹œ์ ๊ณผ ์กฐ๊ฑด๋ถ€ ์ ‘๊ทผ์„ ํ†ตํ•ด ํšจ๊ณผ์ ์œผ๋กœ ํ•ด๊ฒฐํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

์ž๋ฐ” NullPointerException (NPE) ์™„๋ฒฝ ์ •๋ณต ๊ฐ€์ด๋“œ

3 minute read

์ž๋ฐ” ๊ฐœ๋ฐœ์ž์˜ ์˜์›ํ•œ ์ˆ™์ œ, NullPointerException(NPE)์˜ ๋ฐœ์ƒ ์›์ธ์„ ์•Œ์•„๋ณด๊ณ , null ์ฒดํฌ, Optional, ์–ด๋…ธํ…Œ์ด์…˜ ๋“ฑ NPE๋ฅผ ๋ฐฉ์ง€ํ•˜๊ณ  ์šฐ์•„ํ•˜๊ฒŒ ์ฒ˜๋ฆฌํ•˜๋Š” ๋‹ค์–‘ํ•œ ์‹ค์šฉ์ ์ธ ๋ฐฉ๋ฒ•์„ ๋ฐฐ์›Œ๋ณด์„ธ์š”.

java.lang.ArrayIndexOutOfBoundsException ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

java.lang.ArrayIndexOutOfBoundsException์€ ๋ฐฐ์—ด์˜ ์œ ํšจํ•œ ์ธ๋ฑ์Šค ๋ฒ”์œ„๋ฅผ ๋ฒ—์–ด๋‚˜ ์ ‘๊ทผํ•  ๋•Œ ๋ฐœ์ƒํ•˜๋Š” ํ”ํ•œ ๋Ÿฐํƒ€์ž„ ์˜ˆ์™ธ์ž…๋‹ˆ๋‹ค. ์ด ๊ธ€์—์„œ๋Š” ์˜ค๋ฅ˜์˜ ์›์ธ๊ณผ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•์„ ์ž์„ธํžˆ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.