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  • search() μ‚¬μš©

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  1. javascript-api

string.search

search() λ©”μ„œλ“œλŠ” μ •κ·œμ‹κ³Ό String object μ‚¬μ΄μ˜ μΌμΉ˜μ— λŒ€ν•œ 검색을 μ‹€ν–‰ν•œλ‹€.

const paragraph = 'The cat (Felis catus) is a domestic species of small carnivorous mammal.';
// λ‹¨μ–΄λ‚˜ 곡백이 μ•„λ‹Œ λͺ¨λ“  문자
const regex = /[^\w\s]/g;
const result = paragraph.search(regex); // 8
paragraph.charAt(result); // "("

Syntax

str.search(regexp)

Parameters

regexp

μ •κ·œν‘œν˜„μ‹ 객체

μ •κ·œμ‹μ΄ μ•„λ‹Œ 객체가 μ „λ‹¬λ˜λ©΄, 그것은 new RegExp(obj)λ₯Ό μ΄μš©ν•˜μ—¬ RegExp으둜 μ•”λ¬΅μ μœΌλ‘œ λ³€ν™˜λœλ‹€.

Return value

μ£Όμ–΄μ§„ λ¬Έμžμ—΄κ³Ό μ •κ·œμ‹μ‚¬μ΄μ— κ°€μž₯ 첫 맀치의 index이닀. λ§€μΉ˜λ˜μ§€ μ•ŠλŠ”λ‹€λ©΄ -1을 return ν•œλ‹€.

Description

νŒ¨ν„΄μ΄ μžˆλŠ”μ§€ 여뢀와 λ¬Έμžμ—΄ 내에 indexλ₯Ό μ•Œκ³  μ‹Άλ‹€λ©΄ search() λ₯Ό μ‚¬μš©ν•œλ‹€. (였직 쑴재 유무만 μ•Œκ³ μ‹Άλ‹€λ©΄ test() λ©”μ„œλ“œλ₯Ό μ‚¬μš©ν•˜μ—¬ boolean값을 λ°˜ν™˜ν•œλ‹€.) 더 λ§Žμ€ 정보λ₯Ό μ–»μ§€λ§Œ 느릴 수 μžˆλŠ” match()λ₯Ό μ‚¬μš©ν•  수 μžˆλ‹€. (exec()와 μœ μ‚¬ν•˜λ‹€)

Examples

search() μ‚¬μš©

λ‹€μŒ μ˜ˆμ œλŠ” 두 개의 λ‹€λ₯Έ μ •κ·œμ‹ 객체둜 λ¬Έμžμ—΄μ„ κ²€μƒ‰ν•˜μ—¬ 성곡적인 검색(μ–‘μˆ˜)와 μ‹¬νŒ¨ν•œ 검색(-1)을 ν‘œμ‹œν•œλ‹€.

const str = 'The cat (Felis catus) is a domestic species of small carnivorous mammal.';
const re = /[A-Z]/g;
const re2 = /[,]/g;
str.search(re); // 0
str.search(re2); // -1
Previousstring.sliceNextstring.padEnd

Last updated 5 years ago

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