Uiua

Uiua is a stack-based array-oriented programming language created by Kai Schmidt (He/Him). It uses a right-to-left top-to-bottom evaluation scheme.

Like other array languages, the only composite data type is the multidimensional rank-polymorphic array. Operations can be applied to the whole array without needing explicit flow-control. Uiua's array model is similar to J, a language descended from APL.

Uiua does not have different monadic and dyadic behaviors for each glyph, as it uses a stack. There are several other fundamental differences that are outlined on the Uiua website.

Uiua features a configurable Unicode formatter that gives ASCII names to its glyphs which can assist in writing code. Uiua's glyph choices are inspired from BQN, another APL descendant. Additionally, the language has out-of-the-box support for rendering arrays as images, playing an arrays as audio, and performing HTTP operations.

Uiua's website includes its interactive playground, documentation, examples, and notes about its design. Its Rust source code is hosted on Github.

Sample Code

The average of an array

Avg ← ÷⊃⧻/+
Avg 0_2_1_5

The first 12 numbers of the Fibonacci series

⇌[⍥⊃+⊙∘10 1 0]

The Quadratic Equation

Quad ← ÷⊙-⊃⊓'×2∘(⊟¯.√+×.∶×ׯ4⊙∶)
Quad 1 2 0

Renders the Uiua Logo

xy ← ⍘⍉⊞⊟. ÷÷2∶ -÷2,⇡.200
rgb ← [∶⍘⊟×.xy ↯△⊢xy0.5]
u ← ↥<0.2∶>0.7.+×2 ×.∶⍘⊟xy
c ← <∶√/+ⁿ2 xy
⍉⊂∶-¬u c1 +0.1 ∺↧rgb c0.95