Commit d57e5d5

committed

doc: update question 467 substr vs substring

1 parent a5cf154 commit d57e5d5Copy full SHA for d57e5d5

File tree

+13

-2

lines changed

+13

-2

lines changed

Lines changed: 13 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -8845,8 +8845,19 @@ The execution context is created when a function is called. The function's code`
`8845`	`8845`	`[⬆ Back to Top](#table-of-contents)`
`8846`	`8846`
`8847`	`8847`	`467. ### What is the difference between substring and substr methods?`
`8848`		`- Both substring() and substr() are string methods, which are used to find substring of a given string. But there are some notable differences with their usage,`
`8849`		`-`
	`8848`	`+There are subtle differences between the substring() and substr() methods, so you should be careful not to get them confused.`
	`8849`	`+`
	`8850`	`+- The two parameters of substr() are start and length, while for substring(), they are start and end.`
	`8851`	`+- substr()'s start index will wrap to the end of the string if it is negative, while substring() will clamp it to 0.`
	`8852`	`+- Negative lengths in substr() are treated as zero, while substring() will swap the two indexes if end is less than start.`
	`8853`	`+`
	`8854`	`+Furthermore, substr() is considered a legacy feature in ECMAScript, so it is best to avoid using it if possible.`
	`8855`	`+`
	`8856`	+```javascript
	`8857`	`+const text = "Mozilla";`
	`8858`	`+console.log(text.substring(2, 5)); // "zil"`
	`8859`	`+console.log(text.substr(2, 3)); // "zil"`
	`8860`	+```
`8850`	`8861`
`8851`	`8862`	`[⬆ Back to Top](#table-of-contents)`
`8852`	`8863`

Comments

(0)