array-mumu 0.2.0-rc.5

Array tools plugin for the Mumu ecosystem
Documentation 
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extend("test")
extend("array")

describe("array:join", () => {
  it("joins a string array with a separator", () => {
    expect_equal(array:join("-", ["a","b","c"]), "a-b-c")
  })
  it("returns empty string for empty arrays", () => {
    expect_equal(array:join(",", []), "")
  })
  it("accepts MixedArray of strings", () => {
    expect_equal(array:join(":", ["a","b"]), "a:b")
    expect_equal(array:join(":", ["x"]), "x")
  })
  it("passes through single string input unchanged", () => {
    expect_equal(array:join(",", "hello"), "hello")
  })
  it("supports partial usage with separator first", () => {
    j = array:join("/")
    expect_equal(j(["p","q"]), "p/q")
  })
  it("supports placeholder for separator with array known", () => {
    p = array:join(_, ["A","B"])
    expect_equal(p("-"), "A-B")
  })
})