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all tests passed #985

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2 changes: 2 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -8,3 +8,5 @@
/checkouts
/.lein-deps-sum
/.lein-plugins
.idea
.nrepl-port
56 changes: 56 additions & 0 deletions predicates.iml
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<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="BuildSystem">
<option name="buildSystemId" value="LEININGEN" />
<option name="displayName" value="predicates:1.0.0-SNAPSHOT" />
</component>
<component name="NewModuleRootManager">
<output url="file://$MODULE_DIR$/target/classes" />
<output-test url="file://$MODULE_DIR$/target/classes" />
<exclude-output />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/dev-resources" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/resources" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
<excludeFolder url="file://$MODULE_DIR$/target" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" name="Leiningen: clj-time:0.14.4" level="project" />
<orderEntry type="library" name="Leiningen: clj-tuple:0.2.2" level="project" />
<orderEntry type="library" name="Leiningen: clojure-complete:0.2.5" level="project" />
<orderEntry type="library" name="Leiningen: colorize:0.1.1" level="project" />
<orderEntry type="library" name="Leiningen: com.rpl/specter:1.0.5" level="project" />
<orderEntry type="library" name="Leiningen: commons-codec:1.11" level="project" />
<orderEntry type="library" name="Leiningen: environ:1.1.0" level="project" />
<orderEntry type="library" name="Leiningen: fipp:0.6.13" level="project" />
<orderEntry type="library" name="Leiningen: flare:0.2.9" level="project" />
<orderEntry type="library" name="Leiningen: iloveponies.tests/predicates:0.2.0-SNAPSHOT" level="project" />
<orderEntry type="library" name="Leiningen: io.aviso/pretty:0.1.35" level="project" />
<orderEntry type="library" name="Leiningen: joda-time:2.9.9" level="project" />
<orderEntry type="library" name="Leiningen: marick/suchwow:6.0.2" level="project" />
<orderEntry type="library" name="Leiningen: midje-grader:0.1.0-SNAPSHOT" level="project" />
<orderEntry type="library" name="Leiningen: midje:1.9.4" level="project" />
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<orderEntry type="library" name="Leiningen: nrepl:0.6.0" level="project" />
<orderEntry type="library" name="Leiningen: org.clojars.brenton/google-diff-match-patch:0.1" level="project" />
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<orderEntry type="library" name="Leiningen: org.clojure/core.rrb-vector:0.0.13" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/core.specs.alpha:0.2.44" level="project" />
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<orderEntry type="library" name="Leiningen: org.clojure/data.json:0.2.3" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/java.classpath:0.2.3" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/math.combinatorics:0.1.4" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/spec.alpha:0.2.176" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/test.check:0.10.0-alpha3" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/tools.macro:0.1.5" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/tools.namespace:0.3.0-alpha4" level="project" />
<orderEntry type="library" name="Leiningen: org.clojure/tools.reader:0.10.0" level="project" />
<orderEntry type="library" name="Leiningen: org.tcrawley/dynapath:1.0.0" level="project" />
<orderEntry type="library" name="Leiningen: potemkin:0.4.4" level="project" />
<orderEntry type="library" name="Leiningen: riddley:0.1.12" level="project" />
<orderEntry type="library" name="Leiningen: slingshot:0.12.2" level="project" />
</component>
</module>
31 changes: 19 additions & 12 deletions src/predicates.clj
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(ns predicates)

(defn sum-f [f g x]
:-)
(+ (f x) (g x)))

(defn less-than [n]
:-)
(fn [k] (< k n)))

(defn equal-to [n]
:-)
(fn [k] (== k n)))

(defn set->predicate [a-set]
:-)
(fn [k] (contains? a-set k)))

(defn pred-and [pred1 pred2]
:-)
(fn [k] (and (pred1 k) (pred2 k))))

(defn pred-or [pred1 pred2]
:-)
(fn [k] (or (pred1 k) (pred2 k))))

(defn whitespace? [character]
(Character/isWhitespace character))

(defn blank? [string]
:-)
(every? whitespace? string))

(defn has-award? [book award]
:-)
(contains? (:awards book) award))

(defn HAS-ALL-THE-AWARDS? [book awards]
:-)
(every? (fn [award] (has-award? book award)) awards))

(defn my-some [pred a-seq]
:-)
(let [filtered (filter pred a-seq)]
(if (empty? filtered)
false
(pred (first filtered)))
))

(defn my-every? [pred a-seq]
:-)
(empty? (filter (complement pred) a-seq)))

(defn prime? [n]
:-)
(let [divides? (fn [divisor]
(filter (fn [num] (== (mod n num) 0)) (range 2 (inc divisor))))]
(empty? (divides? (int (Math/sqrt n))))
))
;^^