50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
## Use
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Examples (edge cases can be found in each function's documentation):
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```typescript
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// Create iterables
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const i1 = iarray([1, 2, 3]); // 1 2 3
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const i2 = isingle(4); // 4
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const i3 = irecur(0, (x) => x - 1); // 0 -1 -2 -3 -4 ...
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const i4 = irange(5); // 0 1 2 3 4
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const i5 = irange(5, 1, 2); // 1 3 5 7 9
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const i6 = istep(4, iarray([1, 10, 1, -1])); // 4 5 15 16 15
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const i7 = irepeat(2); // 2 2 2 2 2 ...
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// Consume iterables
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iforeach(i1, console.log);
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ifirst(i6); // 4
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ifirstmap(i1, (x) => x > 1 ? -x : null); // -2
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imaterialize(i1); // [1, 2, 3]
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ilength(i1); // 3
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iat(i5, 3); // 7
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ireduce(i1, (a, b) => a + b, 0); // 6
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isum(i1); // 6
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icat(iarray(["a", "b", "c"])); // abc
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imin(i1); // 1
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imax(i1); // 3
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// Transform iterables
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iloop(i1); // 1 2 3 1 2 3 ...
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iskip(i3, 2); // -2 -3 -4 -5 -6 ...
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imap(i1, (x) => x * 2); // 2 4 6
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ifilter(i3, (x) => x % 4 == 0); // 0 -4 -8 -12 ...
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imapfilter(i1, (x) => x != 4 ? x * 2 : null); // 2 6
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ipartition(i3, (x) => x % 4 == 0); // [0 -4 -8 ..., -1 -2 -3 -5 ...]
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iunique(iarray([1, 4, 2, 4, 3, 1, 5])); // 1 4 2 3 5
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// Combine iterables
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ichain(i1, i2); // 1 2 3 4
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ichainit(iarray([i1, i2])); // 1 2 3 4
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icombine(iarray([0, 1]), iarray(["a", "b"])); // [0, "a"] [0, "b"] [1, "a"] [2, "b"]
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izip(iarray([0, 1]), iarray(["a", "b"])); // [0, "a"] [1, "b"]
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ialternate(iarray([0, 1]), iarray(["a", "b"])); // 0 "a" 1 "b"
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// Type filter (result is a typed iterable)
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ifiltertype(iarray([1, "a", 2, "b"]), (x): x is number => typeof x == "number"); // 1 2
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class A {}
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class B {}
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ifilterclass(iarray([new A(), new B(), new A()]), A); // A A
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```
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