[#CLJ-1449] Add starts-with? and ends-with? to clojure.string - Clojure JIRA

Details

Type: Enhancement
Status: Open
Priority: Minor
Resolution: Unresolved
Affects Version/s: Release 1.6
Fix Version/s: None
Component/s: None
Labels:
- string

Approval:
Triaged

Description

Add clojure.string/starts-with? and ends-with? similar to java.lang.String's startsWith/endsWith. In addition to making these easier to find and use, this provides a place to add a portable ClojureScript variant.

Activity

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Alex Miller added a comment - 19/Jun/14 12:53 PM

Re substring, there is a clojure.core/subs for this (predates the string ns I believe).

clojure.core/subs
([s start] [s start end])
Returns the substring of s beginning at start inclusive, and ending
at end (defaults to length of string), exclusive.

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Alex Miller added a comment - 19/Jun/14 12:53 PM Re substring, there is a clojure.core/subs for this (predates the string ns I believe). clojure.core/subs ([s start] [s start end]) Returns the substring of s beginning at start inclusive, and ending at end (defaults to length of string), exclusive.

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Jozef Wagner added a comment - 20/Jun/14 3:21 AM

As strings are collection of characters, you can use Clojure's sequence facilities to achieve such functionality:

user=> (= (first "asdf") \a)
true
user=> (= (last "asdf") \a)
false

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Jozef Wagner added a comment - 20/Jun/14 3:21 AM As strings are collection of characters, you can use Clojure's sequence facilities to achieve such functionality:

user=> (= (first "asdf") \a)
true
user=> (= (last "asdf") \a)
false

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Alex Miller added a comment - 20/Jun/14 8:33 AM

Jozef, String.startsWith() checks for a prefix string, not just a prefix char.

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Alex Miller added a comment - 20/Jun/14 8:33 AM Jozef, String.startsWith() checks for a prefix string, not just a prefix char.

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Bozhidar Batsov added a comment - 20/Jun/14 9:42 AM

Re substring, I know about subs, but it seems very odd that it's not in the string ns. After all most people will likely look for string-related functionality in clojure.string. I think it'd be best if `subs` was added to clojure.string and clojure.core/subs was deprecated.

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Bozhidar Batsov added a comment - 20/Jun/14 9:42 AM Re substring, I know about subs, but it seems very odd that it's not in the string ns. After all most people will likely look for string-related functionality in clojure.string. I think it'd be best if `subs` was added to clojure.string and clojure.core/subs was deprecated.

People

Assignee:

Unassigned

Reporter:

Bozhidar Batsov

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Dates

Created:

19/Jun/14 9:51 AM

Updated:

20/Jun/14 9:42 AM