clojure.string/blank?

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Type: function Added: Clojure 1.2 Examples: 3 Runnable: 3

([s])

True if s is nil, empty, or contains only whitespace.

Examples

by dakrone on 2010-12-30 ▶

(clojure.string/blank? nil) true (clojure.string/blank? "") true (clojure.string/blank? " ") true (clojure.string/blank? " a ") false (clojure.string/blank? false) true (clojure.string/blank? "\n") true

by phreed on 2018-05-17 ▶

;; A way to remove blanks from a string. (def astr "This contains blanks \n \t \r and other whitespace") (->> astr (#(clojure.string/split % #"\s")) (remove clojure.string/blank?) (clojure.string/join " ")) ;;=> "This contains blanks and other whitespace" ;; Of course the task can be better performed other ways. ;; The goal here is just to show how blank? works. (clojure.string/replace (clojure.string/trim astr) #"\s{2,}" " ")

by reborg on 2018-08-23 ▶

;; The list of the 25 whitespace chars in UTF-16. Using the \uNNNN hex code ;; when another representation is not available or not printable. ;; \u0020 is the common white space, AKA " " or '\space' as a single char. (require '[clojure.string :as s]) (s/blank? "\t \n \u000b \f \r \u001c \u001d \u001e \u001f") ;; true (s/blank? "\u0020 \u1680 \u2000 \u2001 \u2002 \u2003") ;; true (s/blank? "\u2004 \u2005 \u2006 \u2008 \u2009") ;; true (s/blank? "\u200a \u2028 \u2029 \u205f \u3000") ;; true

See also

• clojure.string/trim (0)
• clojure.string/triml
• clojure.string/trimr

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