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OlaoluwaM/namedParams.test.ts

Last active June 25, 2022 13:04
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Revisions

  1. OlaoluwaM revised this gist Jun 25, 2022. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion namedParams.test.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -5,7 +5,7 @@ const namedParamExampleFn = toNamedParams(exampleFn)

    console.log(namedParamExampleFn({c: true, a: 1}))

    # test #2
    // test #2
    function testFn(a: number, b: string) {
    return a + b
    }
  2. OlaoluwaM revised this gist Jun 25, 2022. 2 changed files with 16 additions and 11 deletions.
    15 changes: 15 additions & 0 deletions namedParams.test.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,15 @@
    // test #1
    const exampleFn = (a: number, b:string, c: boolean) => [a, b, c]

    const namedParamExampleFn = toNamedParams(exampleFn)

    console.log(namedParamExampleFn({c: true, a: 1}))

    # test #2
    function testFn(a: number, b: string) {
    return a + b
    }

    const namedTestFn = toNamedParams(testFn)

    console.log(namedTestFn({b: 's', a: 1}))
    12 changes: 1 addition & 11 deletions namedParams.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -45,14 +45,4 @@ function generateInitialParamsObj(functionParams: FuncParams) {

    function generateEmptyParamObj(obj: Record<string, undefined>, param: string): Record<string, undefined> {
    return {...obj, [param]: undefined}
    }

    // Example Usage

    function testFn(a: number, b: string) {
    return a + b
    }

    const namedTestFn = toNamedParams(testFn)

    console.log(namedTestFn({b: 's', a: 1}))
    }
  3. OlaoluwaM created this gist Jun 25, 2022.
    58 changes: 58 additions & 0 deletions namedParams.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,58 @@
    type AnyFunction<P = any, RT = unknown> = (...args: P[]) => RT
    type FuncParams = string[]


    function toNamedParams<Fn extends AnyFunction>(fn: Fn) {
    const initialFuncParamObj = generateInitialParamsObj(getFuncPositionalParams(fn))

    return (passedArgsObj: Record<string, Parameters<Fn>[number]) => {
    const funcArgsArr = Object.values({...initialFuncParamObj, ...passedArgsObj})
    return fn.apply(null, funcArgsArr)
    }
    }

    function getFuncPositionalParams(fn: AnyFunction) {
    const REGEX_FOR = {
    CONTENT_WITHIN_PARENTHESES: /\([^)]*\)/m,
    PARENTHESES: /\(|\)/g,
    SPACE_AND_COMMA_DELIMITED_LIST: /\s*,\s*/
    }

    const funcParamsStrMatchArr = fn.toString().match(REGEX_FOR.CONTENT_WITHIN_PARENTHESES)
    if (!funcParamsStrMatchArr) throw new Error(`Could not extract args for ${fn.name} function`)

    const [funcParamsStr] = funcParamsStrMatchArr
    const funcParamsStrWithoutBraces = funcParamsStr.replace(REGEX_FOR.PARENTHESES, '')

    const funcParamsArr = funcParamsStrWithoutBraces.split(REGEX_FOR.SPACE_AND_COMMA_DELIMITED_LIST).map(removeEverythingAfterFirstSpace)
    return funcParamsArr
    }

    function removeEverythingAfterFirstSpace(str: string): string {
    const SPACE_CHAR = ' '

    const indexOfFirstSpaceCharInStr = str.indexOf(SPACE_CHAR)
    if (indexOfFirstSpaceCharInStr === -1) return str

    const truncatedStr = str.slice(0, indexOfFirstSpaceCharInStr)
    return truncatedStr
    }

    function generateInitialParamsObj(functionParams: FuncParams) {
    const funcParamsObj = functionParams.reduce(generateEmptyParamObj, {})
    return funcParamsObj
    }

    function generateEmptyParamObj(obj: Record<string, undefined>, param: string): Record<string, undefined> {
    return {...obj, [param]: undefined}
    }

    // Example Usage

    function testFn(a: number, b: string) {
    return a + b
    }

    const namedTestFn = toNamedParams(testFn)

    console.log(namedTestFn({b: 's', a: 1}))