Difference between revisions of "Higher Order Functions Hall of Fame Assignment"
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=Code To Implement= | =Code To Implement= | ||
− | == | + | ==MapHof== |
+ | ===map=== | ||
{{JavaToImplement|MapHof|map|hof.map.assignment}} | {{JavaToImplement|MapHof|map|hof.map.assignment}} | ||
<nowiki>public static <T, R> ImmutableList<R> map(Function<T, R> f, ImmutableList<T> list)</nowiki> {{HofHof}} | <nowiki>public static <T, R> ImmutableList<R> map(Function<T, R> f, ImmutableList<T> list)</nowiki> {{HofHof}} | ||
+ | ===apps=== | ||
{{JavaToImplement|MapHofApps|mapToLengths<br>mapToStrictlyLessThan|hof.map.assignment}} | {{JavaToImplement|MapHofApps|mapToLengths<br>mapToStrictlyLessThan|hof.map.assignment}} | ||
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<nowiki>public static ImmutableList<Boolean> mapToStrictlyLessThan(ImmutableList<Integer> xs, int threshold)</nowiki> | <nowiki>public static ImmutableList<Boolean> mapToStrictlyLessThan(ImmutableList<Integer> xs, int threshold)</nowiki> | ||
− | == | + | ==FilterHof== |
+ | ===filter=== | ||
{{JavaToImplement|FilterHof|filter|hof.filter.assignment}} | {{JavaToImplement|FilterHof|filter|hof.filter.assignment}} | ||
<nowiki>public static <E> ImmutableList<E> filter(Predicate<E> predicate, ImmutableList<E> list)</nowiki> {{HofHof}} | <nowiki>public static <E> ImmutableList<E> filter(Predicate<E> predicate, ImmutableList<E> list)</nowiki> {{HofHof}} | ||
+ | ===apps=== | ||
{{JavaToImplement|FilterHofApps|filterWordsWhichContainAllVowels<br>filterEvens|hof.map.assignment}} | {{JavaToImplement|FilterHofApps|filterWordsWhichContainAllVowels<br>filterEvens|hof.map.assignment}} | ||
Line 22: | Line 26: | ||
<nowiki>public static ImmutableList<Integer> filterEvens(ImmutableList<Integer> xs)</nowiki> | <nowiki>public static ImmutableList<Integer> filterEvens(ImmutableList<Integer> xs)</nowiki> | ||
+ | ==FoldHof== | ||
+ | <!-- | ||
Lexical scope is not unique to ML. Nearly all programming languages use lexical scope, including Java. | Lexical scope is not unique to ML. Nearly all programming languages use lexical scope, including Java. | ||
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Next, we will build some applications which use fold: sum (which does not require lexical scope) and countBetweenMinAndMaxExclusive (which does). | Next, we will build some applications which use fold: sum (which does not require lexical scope) and countBetweenMinAndMaxExclusive (which does). | ||
− | + | --> | |
− | |||
{{JavaToImplement|FoldHof|foldLeft<br>foldRight|hof.fold.assignment}} | {{JavaToImplement|FoldHof|foldLeft<br>foldRight|hof.fold.assignment}} | ||
Line 48: | Line 53: | ||
===countBetweenMinAndMaxExclusive=== | ===countBetweenMinAndMaxExclusive=== | ||
<nowiki>public static int countBetweenMinAndMaxExclusive(int min, int maxExclusive, ImmutableList<Integer> xs)</nowiki> | <nowiki>public static int countBetweenMinAndMaxExclusive(int min, int maxExclusive, ImmutableList<Integer> xs)</nowiki> | ||
+ | |||
+ | ==Find== | ||
+ | |||
+ | ==Find Apps== | ||
=Test= | =Test= |
Revision as of 07:15, 14 February 2020
Contents
Code To Implement
MapHof
map
class: | MapHof.java | ![]() |
methods: | map | |
package: | hof.map.assignment | |
source folder: | src/main/java |
public static <T, R> ImmutableList<R> map(Function<T, R> f, ImmutableList<T> list)![]()
apps
class: | MapHofApps.java | ![]() |
methods: | mapToLengths mapToStrictlyLessThan |
|
package: | hof.map.assignment | |
source folder: | src/main/java |
public static ImmutableList<Integer> mapToLengths(ImmutableList<String> texts)
public static ImmutableList<Boolean> mapToStrictlyLessThan(ImmutableList<Integer> xs, int threshold)
FilterHof
filter
class: | FilterHof.java | ![]() |
methods: | filter | |
package: | hof.filter.assignment | |
source folder: | src/main/java |
public static <E> ImmutableList<E> filter(Predicate<E> predicate, ImmutableList<E> list)![]()
apps
class: | FilterHofApps.java | ![]() |
methods: | filterWordsWhichContainAllVowels filterEvens |
|
package: | hof.map.assignment | |
source folder: | src/main/java |
public static ImmutableList<String> filterWordsWhichContainAllVowels(ImmutableList<String> words)
public static ImmutableList<Integer> filterEvens(ImmutableList<Integer> xs)
FoldHof
class: | FoldHof.java | ![]() |
methods: | foldLeft foldRight |
|
package: | hof.fold.assignment | |
source folder: | src/main/java |
foldLeft
public static <A, B> A foldLeft(BiFunction<A, B, A> f, A acc, ImmutableList<B> list)![]()
foldLeft(f, initial_value, [x1, x2, ..., xn])
- returns
f(xn,...,f(x2, f(x1, initial_value))...)
orinitial_value
if the list is empty.
foldRight
public static <A, B> A foldRight(BiFunction<A, B, A> f, A acc, ImmutableList<B> list)![]()
foldRight(f, initial_value, [x1, x2, ..., xn])
- returns
f(x1, f(x2, ..., f(xn, init)...))
orinitial_value
if the list is empty.
Fold Apps
class: | FoldHofApps.java | ![]() |
methods: | sum countBetweenMinAndMaxExclusive |
|
package: | hof.map.assignment | |
source folder: | src/main/java |
sum
public static int sum(ImmutableList<Integer> xs)
countBetweenMinAndMaxExclusive
public static int countBetweenMinAndMaxExclusive(int min, int maxExclusive, ImmutableList<Integer> xs)
Find
Find Apps
Test
class: | HigherOrderFunctionTestSuite.java | ![]() |
package: | hof.assignment | |
source folder: | src/test/java |
Map
class: | MapTestSuite.java | ![]() |
package: | hof.map.assignment | |
source folder: | src/test/java |
Filter
class: | FilterTestSuite.java | ![]() |
package: | hof.filter.assignment | |
source folder: | src/test/java |
Fold
class: | FoldTestSuite.java | ![]() |
package: | hof.fold.assignment | |
source folder: | src/test/java |
Filter
class: | FindTestSuite.java | ![]() |
package: | hof.find.assignment | |
source folder: | src/test/java |
Test
class: | FoldTestSuite.java | ![]() |
package: | hof.fold.assignment | |
source folder: | src/test/java |