Clojure functions usage frequencies

most-used-fns.clj

;; The list of (almost) all Clojure public functions and macros ordered by usage. Source: Github code search for Clojure repositories.

(["ns" 394490]
 ["defn" 293918]
 ["require" 279210]
 ["let" 237654]
 ["def" 172983]
 ["refer" 163654]
 ["map" 159781]
 ["fn" 154482]
 ["str" 145899]
 ["nil?" 125109]
 ["use" 119952]
 ["test" 115419]
 ["first" 98908]
 ["get" 93911]
 ["true?" 91826]
 ["when" 91463]
 ["name" 90469]
 ["string?" 86492]
 ["if" 85942]
 ["keys" 85435]
 ["not" 85308]
 ["*in*" 84696]
 ["count" 82940]
 ["apply" 82234]
 ["main" 80433]
 ["assoc" 78532]
 ["and" 76927]
 ["not=" 76252]
 ["for" 73239]
 ["false?" 72914]
 ["println" 72155]
 ["or" 67785]
 ["import" 67653]
 ["set" 66771]
 ["import*" 65438]
 ["set?" 65314]
 ["deftest" 64479]
 ["list?" 62066]
 ["seq?" 62007]
 ["seq" 60948]
 ["into" 60415]
 ["key" 59403]
 ["empty" 58002]
 ["empty?" 57831]
 ["set!" 57801]
 ["type" 57437]
 ["list" 57118]
 ["io!" 56924]
 ["file" 56414]
 ["filter" 56371]
 ["list*" 56287]
 ["*file*" 55083]
 ["defn-" 54947]
 ["atom" 54225]
 ["cond" 53323]
 ["path" 53253]
 ["update" 52794]
 ["are" 52436]
 ["remove" 52303]
 ["recur" 52122]
 ["reduce" 51871]
 ["loop*" 51379]
 ["loop" 51379]
 ["conj!" 51138]
 ["conj" 51138]
 ["inc" 50946]
 ["write" 50195]
 ["print" 47563]
 ["root" 47313]
 ["range" 46953]
 ["vector?" 46662]
 ["vector" 46662]
 ["parse" 46626]
 ["read" 46619]
 ["take" 46178]
 ["new" 45952]
 ["number?" 45858]
 ["testing" 45662]
 ["some?" 45655]
 ["some" 45202]
 ["*out*" 44851]
 ["merge" 43970]
 ["doseq" 43785]
 ["find" 43687]
 ["try" 43129]
 ["second" 42892]
 ["last" 42657]
 ["rest" 42359]
 ["class?" 41813]
 ["time" 41259]
 ["keyword" 40625]
 ["next" 39318]
 ["content" 39309]
 ["format" 39007]
 ["case" 38936]
 ["case*" 38259]
 ["class" 37994]
 ["contains?" 37554]
 ["swap!" 37527]
 ["source" 37508]
 ["index" 36447]
 ["throw" 36069]
 ["integer?" 35779]
 ["concat" 35451]
 ["function?" 35450]
 ["join" 34933]
 ["partial" 34745]
 ["if-let" 34455]
 ["catch" 33886]
 ["reset!" 33495]
 ["element" 33361]
 ["split" 32910]
 ["vec" 32337]
 ["int" 32097]
 ["replace" 31549]
 ["max" 31451]
 ["repl" 31021]
 ["nth" 30608]
 ["min" 30329]
 ["val" 29939]
 ["dec" 29506]
 ["instance?" 29313]
 ["doc" 29306]
 ["load" 29058]
 ["zero?" 28321]
 ["select" 28231]
 ["when-not" 27818]
 ["resource" 26781]
 ["cons" 26761]
 ["dir" 26315]
 ["hash" 26169]
 ["symbol" 26084]
 ["comp" 25771]
 ["identity" 25749]
 ["reader" 25482]
 ["right" 25451]
 ["meta" 25366]
 ["sort" 24831]
 ["coll?" 24761]
 ["gen-class" 24621]
 ["dissoc!" 24304]
 ["dissoc" 24304]
 ["get-in" 23955]
 ["when-let" 23894]
 ["rights" 23376]
 ["sequence" 23274]
 ["left" 23055]
 ["binding" 22939]
 ["project" 22848]
 ["every?" 22594]
 ["end?" 22252]
 ["tag" 22249]
 ["vals" 22022]
 ["while" 22008]
 ["drop" 21735]
 ["pos?" 21644]
 ["namespace" 21538]
 ["var?" 21129]
 ["doto" 20225]
 ["send" 20070]
 ["boolean" 19798]
 ["repeat" 19785]
 ["comment" 19785]
 ["long" 19362]
 ["reverse" 19326]
 ["update-in" 19034]
 ["num" 18998]
 ["declare" 18634]
 ["var" 18548]
 ["ref" 17937]
 ["double" 17849]
 ["defrecord" 17808]
 ["down" 17735]
 ["slurp" 17592]
 ["even?" 17563]
 ["pr" 17439]
 ["rand" 17359]
 ["assert" 17213]
 ["defprotocol" 17204]
 ["defonce" 17074]
 ["defmethod" 16215]
 ["mapcat" 16115]
 ["char?" 16114]
 ["mod" 15568]
 ["append!" 15326]
 ["writer" 15272]
 ["eval" 15251]
 ["read-string" 15101]
 ["assoc-in" 14988]
 ["*session*" 14971]
 ["copy" 14841]
 ["doall" 14403]
 ["pr-str" 14278]
 ["pprint" 14265]
 ["char" 14171]
 ["re-find" 13956]
 ["hash-map" 13824]
 ["reify*" 13640]
 ["reify" 13640]
 ["float" 13633]
 ["byte" 13447]
 ["extend" 13197]
 ["resolve" 13183]
 ["methods" 13182]
 ["keep" 12674]
 ["defmulti" 12483]
 ["aget" 12331]
 ["flatten" 12120]
 ["bytes" 12110]
 ["subs" 12045]
 ["with-open" 11970]
 ["deref" 11755]
 ["mapv" 11677]
 ["iterate" 11608]
 ["record?" 11547]
 ["constantly" 11485]
 ["future?" 11405]
 ["children" 11287]
 ["pop!" 11286]
 ["pop" 11286]
 ["prn" 11086]
 ["future" 11052]
 ["sorted" 11039]
 ["sync" 11035]
 ["sort-by" 10984]
 ["deftype*" 10968]
 ["deftype" 10968]
 ["condp" 10825]
 ["letfn*" 10572]
 ["letfn" 10572]
 ["zipmap" 10421]
 ["aset" 10298]
 ["select-keys" 10189]
 ["trim" 9881]
 ["dotimes" 9833]
 ["persistent!" 9828]
 ["compile" 9774]
 ["repeatedly" 9748]
 ["compare" 9745]
 ["walk" 9744]
 ["rand-int" 9682]
 ["blank?" 9613]
 ["identical?" 9588]
 ["sequential?" 9490]
 ["newline" 9407]
 ["distinct?" 9385]
 ["distinct" 9385]
 ["quote" 9353]
 ["ensure" 9269]
 ["force" 8989]
 ["finally" 8917]
 ["short" 8894]
 ["*err*" 8810]
 ["difference" 8752]
 ["re-matches" 8746]
 ["proxy" 8677]
 ["lazy-seq" 8551]
 ["complement" 8329]
 ["take-while" 8232]
 ["flush" 8203]
 ["interpose" 8097]
 ["attrs" 8089]
 ["agent" 8068]
 ["*agent*" 8064]
 ["with-meta" 7980]
 ["delay" 7930]
 ["rem" 7912]
 ["dosync" 7832]
 ["group-by" 7715]
 ["merge-with" 7640]
 ["into-array" 7612]
 ["neg?" 7571]
 ["odd?" 7556]
 ["quot" 7551]
 ["gensym" 7543]
 ["edit" 7535]
 ["union" 7528]
 ["map-indexed" 7318]
 ["memoize" 6958]
 ["lower-case" 6804]
 ["spit" 6759]
 ["interleave" 6746]
 ["disj!" 6690]
 ["disj" 6690]
 ["peek" 6684]
 ["cat" 6649]
 ["juxt" 6643]
 ["extend-protocol" 6594]
 ["run-tests" 6554]
 ["chars" 6501]
 ["report" 6463]
 ["re-seq" 6359]
 ["printf" 6352]
 ["subvec" 6337]
 ["dorun" 6318]
 ["butlast" 6268]
 ["not-empty" 6145]
 ["sh" 6087]
 ["satisfies?" 6053]
 ["re-pattern" 6024]
 ["alength" 5941]
 ["ifn?" 5768]
 ["rand-nth" 5740]
 ["cycle" 5652]
 ["prev" 5613]
 ["extend-type" 5539]
 ["shuffle" 5538]
 ["emit" 5425]
 ["ex-info" 5319]
 ["diff" 5251]
 ["frequencies" 5173]
 ["with-out-str" 5155]
 ["*warn-on-reflection*" 5125]
 ["make-array" 5076]
 ["load-file" 5032]
 ["intersection" 4969]
 ["in-ns" 4751]
 ["decimal?" 4714]
 ["branch?" 4708]
 ["transient" 4654]
 ["promise" 4623]
 ["drop-while" 4555]
 ["add-watch" 4497]
 ["upper-case" 4496]
 ["use-fixtures" 4463]
 ["ffirst" 4442]
 ["start-server" 4410]
 ["reduce-kv" 4408]
 ["sorted-map" 4356]
 ["rename" 4238]
 ["drop-last" 4205]
 ["includes?" 4177]
 ["keywordize-keys" 4164]
 ["partition-by" 4065]
 ["parents" 4059]
 ["bit-and" 4003]
 ["ref-set" 3963]
 ["line-seq" 3959]
 ["ratio?" 3914]
 ["split-lines" 3910]
 ["pp" 3778]
 ["alter-var-root" 3747]
 ["formatter" 3733]
 ["ns-name" 3679]
 ["byte-array" 3666]
 ["some->>" 3621]
 ["some->" 3621]
 ["fnil" 3611]
 ["associative?" 3539]
 ["cond->>" 3530]
 ["cond->" 3530]
 ["partition-all" 3494]
 ["derive" 3467]
 ["not-any?" 3409]
 ["extends?" 3361]
 ["capitalize" 3252]
 ["array-map" 3234]
 ["doubles" 3104]
 ["sorted-set" 3096]
 ["ints" 3082]
 ["bit-or" 3068]
 ["max-key" 3054]
 ["reductions" 3051]
 ["split-at" 3040]
 ["split-with" 3016]
 ["bigint" 2989]
 ["cast" 2982]
 ["macroexpand" 2960]
 ["bit-shift-left" 2949]
 ["isa?" 2932]
 ["stop-server" 2931]
 ["filterv" 2915]
 ["realized?" 2900]
 ["hash-set" 2896]
 ["subset?" 2892]
 ["input-stream" 2860]
 ["successful?" 2836]
 ["*print-length*" 2826]
 ["pmap" 2811]
 ["to-array" 2803]
 ["bit-shift-right" 2780]
 ["ex-data" 2715]
 ["alter-meta!" 2713]
 ["counted?" 2709]
 ["take-nth" 2651]
 ["trampoline" 2650]
 ["as->" 2646]
 ["read-line" 2626]
 ["prn-str" 2606]
 ["object-array" 2552]
 ["*print-dup*" 2528]
 ["rseq" 2520]
 ["ancestors" 2467]
 ["remove-watch" 2447]
 ["sorted-map-by" 2446]
 ["compare-and-set!" 2433]
 ["keep-indexed" 2427]
 ["double-array" 2417]
 ["print-str" 2409]
 ["tree-seq" 2403]
 ["folder" 2400]
 ["find-ns" 2400]
 ["bit-xor" 2396]
 ["ns-resolve" 2391]
 ["with-redefs" 2348]
 ["*print-level*" 2339]
 ["file-seq" 2323]
 ["nnext" 2300]
 ["booleans" 2237]
 ["some-fn" 2224]
 ["longs" 2208]
 ["postwalk" 2149]
 ["fnext" 2143]
 ["deliver" 2118]
 ["supers" 2116]
 ["locking" 2115]
 ["rightmost" 2089]
 ["min-key" 2085]
 ["replace-first" 2080]
 ["long-array" 2014]
 ["every-pred" 2007]
 ["nthnext" 1976]
 ["descendants" 1962]
 ["not-every?" 1924]
 ["subseq" 1912]
 ["ns-publics" 1906]
 ["await" 1904]
 ["bit-test" 1883]
 ["aclone" 1875]
 ["*print-meta*" 1871]
 ["prefers" 1866]
 ["ns-interns" 1853]
 ["*print-readably*" 1853]
 ["prefer-method" 1845]
 ["biginteger" 1823]
 ["sorted-set-by" 1822]
 ["bit-not" 1782]
 ["set-validator!" 1779]
 ["reversible?" 1740]
 ["bit-set" 1718]
 ["get-method" 1699]
 ["shorts" 1684]
 ["unchecked-inc" 1675]
 ["make-hierarchy" 1666]
 ["get-validator" 1652]
 ["areduce" 1646]
 ["intern" 1642]
 ["println-str" 1631]
 ["nfirst" 1631]
 ["bit-clear" 1631]
 ["bit-flip" 1630]
 ["shutdown-agents" 1628]
 ["rsubseq" 1624]
 ["fold" 1617]
 ["to-array-2d" 1599]
 ["remove-method" 1591]
 ["bit-and-not" 1573]
 ["as-file" 1553]
 ["unchecked-add-int" 1542]
 ["reset-meta!" 1539]
 ["unchecked-multiply" 1531]
 ["unchecked-dec" 1531]
 ["underive" 1529]
 ["remove-all-methods" 1519]
 ["unchecked-multiply-int" 1504]
 ["unchecked-subtract" 1493]
 ["unchecked-divide-int" 1478]
 ["javadoc" 1454]
 ["rename-keys" 1452]
 ["unchecked-negate" 1423]
 ["unchecked-inc-int" 1419]
 ["zipper" 1417]
 ["error-handler" 1411]
 ["the-ns" 1408]
 ["bean" 1399]
 ["unchecked-subtract-int" 1397]
 ["unchecked-remainder-int" 1396]
 ["proxy-super" 1394]
 ["unchecked-negate-int" 1376]
 ["trim-newline" 1367]
 ["macroexpand-1" 1365]
 ["unchecked-dec-int" 1357]
 ["unsigned-bit-shift-right" 1355]
 ["bigdec" 1285]
 ["send-off" 1281]
 ["re-matcher" 1281]
 ["prewalk" 1244]
 ["var-get" 1225]
 ["lazy-cat" 1212]
 ["munge" 1202]
 ["output-stream" 1201]
 ["commute" 1180]
 ["cl-format" 1172]
 ["*command-line-args*" 1158]
 ["amap" 1133]
 ["*compile-path*" 1131]
 ["map-invert" 1126]
 ["memfn" 1114]
 ["create-ns" 1106]
 ["delete-file" 1098]
 ["pst" 1089]
 ["nthrest" 1054]
 ["triml" 1052]
 ["loaded-libs" 1027]
 ["reducer" 1005]
 ["bases" 993]
 ["trimr" 988]
 ["xml-zip" 982]
 ["clojure-version" 932]
 ["*clojure-version*" 932]
 ["index-of" 917]
 ["starts-with?" 871]
 ["random-sample" 837]
 ["superset?" 822]
 ["print-stack-trace" 821]
 ["iterator-seq" 807]
 ["ns-aliases" 805]
 ["validated" 800]
 ["apropos" 791]
 ["with-local-vars" 775]
 ["with-test" 771]
 ["when-first" 765]
 ["find-doc" 762]
 ["with-bindings" 758]
 ["print-table" 754]
 ["enumeration-seq" 751]
 ["char-array" 734]
 ["ns-map" 732]
 ["ns-unmap" 730]
 ["if-some" 729]
 ["float-array" 705]
 ["rational?" 697]
 ["stringify-keys" 677]
 ["run-all-tests" 672]
 ["*default-data-reader-fn*" 667]
 ["code-dispatch" 659]
 ["demunge" 655]
 ["find-var" 645]
 ["postwalk-replace" 639]
 ["with-pprint-dispatch" 627]
 ["with-in-str" 620]
 ["make-node" 614]
 ["parse-timestamp" 589]
 ["future-cancel" 589]
 ["when-some" 584]
 ["*data-readers*" 578]
 ["ends-with?" 569]
 ["macroexpand-all" 556]
 ["remove-ns" 543]
 ["append-child" 527]
 ["load-string" 522]
 ["destructure" 516]
 ["prewalk-replace" 515]
 ["monitor-enter" 494]
 ["monitor-exit" 493]
 ["re-groups" 489]
 ["root-cause" 484]
 ["definline" 484]
 ["write-out" 474]
 ["test-var" 470]
 ["gen-interface" 465]
 ["simple-dispatch" 457]
 ["pprint-newline" 449]
 ["pprint-logical-block" 449]
 ["ns-imports" 448]
 ["seq-zip" 447]
 ["with-precision" 446]
 ["var-set" 437]
 ["ns-refers" 435]
 ["as-url" 432]
 ["boolean-array" 408]
 ["lefts" 398]
 ["vector-zip" 389]
 ["browse-url" 388]
 ["monoid" 387]
 ["agent-error" 387]
 ["pprint-indent" 385]
 ["test-ns" 383]
 ["pcalls" 381]
 ["formatter-out" 381]
 ["insert-right" 366]
 ["do-template" 354]
 ["set-pprint-dispatch" 348]
 ["short-array" 339]
 ["future-call" 338]
 ["vector-of" 333]
 ["last-index-of" 331]
 ["*compile-files*" 328]
 ["insert-child" 323]
 ["inc-report-counter" 323]
 ["await-for" 313]
 ["print-length-loop" 299]
 ["with-test-out" 293]
 ["insert-left" 292]
 ["*math-context*" 281]
 ["future-done?" 279]
 ["push-thread-bindings" 269]
 ["pvalues" 268]
 ["pop-thread-bindings" 266]
 ["do-report" 263]
 ["assert-expr" 260]
 ["with-sh-dir" 246]
 ["restart-agent" 246]
 ["pprint-tab" 243]
 ["testing-vars-str" 242]
 ["resultset-seq" 242]
 ["read-instant-date" 237]
 ["source-fn" 233]
 ["error-mode" 229]
 ["testing-contexts-str" 226]
 ["rationalize" 226]
 ["load-reader" 224]
 ["thread-bound?" 223]
 ["seque" 216]
 ["aset-int" 214]
 ["test-vars" 210]
 ["char-escape-string" 207]
 ["join-fixtures" 205]
 ["compose-fixtures" 196]
 ["aset-byte" 195]
 ["set-test" 194]
 ["emit-element" 190]
 ["deftest-" 184]
 ["resolve-class" 180]
 ["set-error-handler!" 177]
 ["default-data-readers" 175]
 ["ns-unalias" 174]
 ["update-proxy" 170]
 ["aset-double" 162]
 ["extenders" 161]
 ["repl-read" 160]
 ["repl-caught" 152]
 ["dir-fn" 149]
 ["aset-long" 143]
 ["repl-init" 142]
 ["set-error-mode!" 141]
 ["get-thread-bindings" 141]
 ["test-all-vars" 140]
 ["future-cancelled?" 140]
 ["file-position" 140]
 ["with-sh-env" 139]
 ["get-proxy-class" 139]
 ["aset-char" 139]
 ["apply-template" 139]
 ["construct-proxy" 135]
 ["init-proxy" 134]
 ["load-script" 133]
 ["aset-boolean" 132]
 ["type-reflect" 131]
 ["aset-float" 131]
 ["stack-element-str" 127]
 ["ref-history-count" 123]
 ["print-throwable" 122]
 ["re-quote-replacement" 119]
 ["aset-short" 119]
 ["skip-whitespace" 118]
 ["find-keyword" 117]
 ["read-instant-timestamp" 116]
 ["foldcat" 114]
 ["do-reflect" 114]
 ["release-pending-sends" 112]
 ["try-expr" 110]
 ["read-instant-calendar" 110]
 ["as-relative-path" 109]
 ["ref-max-history" 105]
 ["skip-if-eol" 104]
 ["repl-exception" 100]
 ["char-name-string" 100]
 ["repl-prompt" 98]
 ["send-via" 95]
 ["proxy-mappings" 94]
 ["ref-min-history" 93]
 ["content-handler" 92]
 ["repl-requires" 90]
 ["startparse-sax" 87]
 ["assert-any" 81]
 ["postwalk-demo" 80]
 ["prewalk-demo" 78]
 ["get-possibly-unbound-var" 74]
 ["print-trace-element" 71]
 ["set-agent-send-executor!" 64]
 ["int-map" 64]
 ["set-break-handler!" 63]
 ["add-local-javadoc" 57]
 ["add-remote-javadoc" 56]
 ["with-read-known" 54]
 ["thread-stopper" 50]
 ["flag-descriptors" 44]
 ["stop-servers" 14]
 ["start-servers" 12])