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External module "thread-first"

Index

Functions

Functions

Const threadFirst

  • threadFirst(init: any, ...fns: (function | [function, any])[]): any
  • Takes an init value and a number of functions and/or function tuples, consisting of: [fn, ...args]. Executes each function (or tuple) with the return value of the previous expression inserted as first argument, using init for the first expression.

    const neg = (x) => -x;
    const sub = (a, b) => a - b;
    const div = (a, b) => a / b;
    
    threadFirst(
      5,
      neg,       // -5
      [sub, 20], // -5 - 20 = -25
      [div, 10]  // -25 / 10 = -2.5
    );
    
    // -2.5

    Parameters

    • init: any
    • Rest ...fns: (function | [function, any])[]

    Returns any

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