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codecalypso/ramda_examples.js

Last active July 23, 2017 04:22
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Revisions

  1. codecalypso revised this gist Jul 23, 2017. 1 changed file with 13 additions and 1 deletion.
    14 changes: 13 additions & 1 deletion ramda_examples.js
    View file
    Original file line number Diff line number Diff line change
    @@ -74,4 +74,16 @@ const result = R.partition(highRating, schools)
    const path = lensPath(["a","b", "c"])
    const append = (data) => data.concat(4)
    over(path, append)(state)
    //{"a": {"b": {"c": [1, 2, 3, 4]}}}
    //{"a": {"b": {"c": [1, 2, 3, 4]}}}


    let EmptylaundryBasket = []
    let laundryBasket = ["towels", "pants", "socks"]

    var fn = R.cond([
    [R.isEmpty, R.always('Work on art project')],
    [R.complement(isEmpty), R.always('Head to nearest laundromat')],
    [R.T, always('Nothing to see here')]
    ]);

    fn(laundryBasket) //Head to nearest laundromat
  2. codecalypso revised this gist Jun 29, 2017. 1 changed file with 15 additions and 1 deletion.
    16 changes: 15 additions & 1 deletion ramda_examples.js
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    Original file line number Diff line number Diff line change
    @@ -60,4 +60,18 @@ const result = R.partition(highRating, schools)

    //[[{"name": "Lane", "rating": 10, "type": "public"}, {"name": "Jones", "rating": 10, "type": "public"}, {"name": "Payton", "rating": 10, "type": "public"}],

    //[{"name": "King", "rating": 6, "type": "public"}, {"name": "Kenwood", "rating": 6, "type": "public"}, {"name": "Bogan", "rating": 3, "type": "public"}]]
    //[{"name": "King", "rating": 6, "type": "public"}, {"name": "Kenwood", "rating": 6, "type": "public"}, {"name": "Bogan", "rating": 3, "type": "public"}]]


    const state ={a:
    {
    b:{
    c: [1,2,3]
    }
    }
    }

    const path = lensPath(["a","b", "c"])
    const append = (data) => data.concat(4)
    over(path, append)(state)
    //{"a": {"b": {"c": [1, 2, 3, 4]}}}
  3. codecalypso revised this gist May 14, 2017. 1 changed file with 8 additions and 8 deletions.
    16 changes: 8 additions & 8 deletions ramda_examples.js
    View file
    Original file line number Diff line number Diff line change
    @@ -12,19 +12,19 @@ const person = {
    const flens = R.lens(R.prop("firstName"), R.assoc("firstName"))
    const result = R.view(flens, person)
    //"Bruce"

    const superStars = [
    { name: "Beyonce", grammyCount: 5, birthYear: 1982 },
    { name: "Britney Spears", grammyCount: 0, birthyear: 1980},
    { name: "James Brown", grammyCount: 0, birthYear: 0},
    { name: "Michal Jackson", grammyCount: 0, birthYear: 0},
    { name: "Prince", grammyCount: 0, birthYear: 0},
    { name: "Cher", grammyCount: 0, birthYear: 0}
    { name: "Beyonce", grammys: 22, birthYear: 1981 },
    { name: "Britney Spears", grammys: 1, birthyear: 1981},
    { name: "James Brown", grammys: 6, birthYear: 1933},
    { name: "Michal Jackson", grammys: 13, birthYear: 1958},
    { name: "Prince", grammys: 8, birthYear: 1958},
    { name: "Janet Jackson", grammys: 5, birthYear: 1966}
    ]

    const names = superStars.map(n => ({name: n.name}))

    const names = superStars.map(n => R.pick(['name'], n))
    //[{"name":"Beyonce"},{"name":"Britney Spears"},{"name":"James Brown"},{"name":"Michal Jackson"},{"name":"Prince"},{"name":"Cher”}]
    //[{"name":"Beyonce"},{"name":"Britney Spears"},{"name":"James Brown"},{"name":"Michal Jackson"},{"name":"Prince"},{"name":"Janet Jackson”}]

    const superStars = [
    { name: "Beyonce", grammys: 22, birthYear: 1981 },
  4. codecalypso revised this gist May 14, 2017. 1 changed file with 3 additions and 3 deletions.
    6 changes: 3 additions & 3 deletions ramda_examples.js
    View file
    Original file line number Diff line number Diff line change
    @@ -1,7 +1,7 @@
    var xLens = R.lensProp('x');

    R.view(xLens, {x: 'Jerry', y: 'Tom'}); //“Jerry"
    R.set(xLens, "Tweety", {x: 1, y: "Tom"}); //{"x": "Tweety", "y": "Tom"}
    R.view(xLens, {x: 'Jerry', y: 'Tom'}); //“Jerry"
    R.set(xLens, "Tweety", {x: 1, y: "Tom"}); //{"x": "Tweety", "y": "Tom"}
    R.over(xLens, R.toUpper, {x: "jerry", y: "Tom"}); // {"x": "JERRY", "y": "Tom”}

    const person = {
    @@ -35,7 +35,7 @@ const superStars = [
    { name: "Janet Jackson", grammys: 5, birthYear: 1966}
    ]

    [{"name":"Beyonce","grammys":22,"birthYear":1981},{"name":"Michal Jackson","grammys":13,"birthYear":1958},{"name":"Prince","grammys":8,"birthYear":1958},{"name":"James Brown","grammys":6,"birthYear":1933},{"name":"Janet Jackson","grammys":5,"birthYear":1966},{"name":"Britney Spears","grammys":1,"birthyear":1981}]
    //[{"name":"Beyonce","grammys":22,"birthYear":1981},{"name":"Michal Jackson","grammys":13,"birthYear":1958},{"name":"Prince","grammys":8,"birthYear":1958},{"name":"James Brown","grammys":6,"birthYear":1933},{"name":"Janet Jackson","grammys":5,"birthYear":1966},{"name":"Britney Spears","grammys":1,"birthyear":1981}]

    const beforeEighty = year => year.birthYear < 1980

  5. codecalypso created this gist May 14, 2017.
    63 changes: 63 additions & 0 deletions ramda_examples.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,63 @@
    var xLens = R.lensProp('x');

    R.view(xLens, {x: 'Jerry', y: 'Tom'}); //“Jerry"
    R.set(xLens, "Tweety", {x: 1, y: "Tom"}); //{"x": "Tweety", "y": "Tom"}
    R.over(xLens, R.toUpper, {x: "jerry", y: "Tom"}); // {"x": "JERRY", "y": "Tom”}

    const person = {
    firstName: "Bruce",
    lastName: "Wayne"
    }

    const flens = R.lens(R.prop("firstName"), R.assoc("firstName"))
    const result = R.view(flens, person)
    //"Bruce"

    const superStars = [
    { name: "Beyonce", grammyCount: 5, birthYear: 1982 },
    { name: "Britney Spears", grammyCount: 0, birthyear: 1980},
    { name: "James Brown", grammyCount: 0, birthYear: 0},
    { name: "Michal Jackson", grammyCount: 0, birthYear: 0},
    { name: "Prince", grammyCount: 0, birthYear: 0},
    { name: "Cher", grammyCount: 0, birthYear: 0}
    ]
    const names = superStars.map(n => ({name: n.name}))

    const names = superStars.map(n => R.pick(['name'], n))
    //[{"name":"Beyonce"},{"name":"Britney Spears"},{"name":"James Brown"},{"name":"Michal Jackson"},{"name":"Prince"},{"name":"Cher”}]

    const superStars = [
    { name: "Beyonce", grammys: 22, birthYear: 1981 },
    { name: "Britney Spears", grammys: 1, birthyear: 1981},
    { name: "James Brown", grammys: 6, birthYear: 1933},
    { name: "Michal Jackson", grammys: 13, birthYear: 1958},
    { name: "Prince", grammys: 8, birthYear: 1958},
    { name: "Janet Jackson", grammys: 5, birthYear: 1966}
    ]

    [{"name":"Beyonce","grammys":22,"birthYear":1981},{"name":"Michal Jackson","grammys":13,"birthYear":1958},{"name":"Prince","grammys":8,"birthYear":1958},{"name":"James Brown","grammys":6,"birthYear":1933},{"name":"Janet Jackson","grammys":5,"birthYear":1966},{"name":"Britney Spears","grammys":1,"birthyear":1981}]

    const beforeEighty = year => year.birthYear < 1980

    //[{"birthYear": 1933, "grammys": 6, "name": "James Brown"}, {"birthYear": 1958, "grammys": 13, "name": "Michal Jackson"}, {"birthYear": 1958, "grammys": 8, "name": "Prince"}, {"birthYear": 1966, "grammys": 5, "name": "Janet Jackson”}]

    const eightyAndAfter = R.reject(beforeEighty, superStars)

    //[{"birthYear": 1981, "grammys": 22, "name": "Beyonce"}, {"birthyear": 1981, "grammys": 1, "name": "Britney Spears”}]

    const schools = [
    { name: "King", rating: 6, type: "public"},
    { name: "Kenwood", rating: 6, type: "public"},
    { name: "Lane", rating: 10, type: "public"},
    { name: "Bogan", rating: 3, type: "public"},
    { name: "Jones", rating: 10, type: "public"},
    { name: "Payton", rating: 10, type: "public"},
    ]

    const highRating = score => score.rating > 8

    const result = R.partition(highRating, schools)

    //[[{"name": "Lane", "rating": 10, "type": "public"}, {"name": "Jones", "rating": 10, "type": "public"}, {"name": "Payton", "rating": 10, "type": "public"}],

    //[{"name": "King", "rating": 6, "type": "public"}, {"name": "Kenwood", "rating": 6, "type": "public"}, {"name": "Bogan", "rating": 3, "type": "public"}]]