{"id":2589,"date":"2022-05-13T15:18:29","date_gmt":"2022-05-13T12:18:29","guid":{"rendered":"https:\/\/www.etemkeskin.com\/?p=2589"},"modified":"2022-05-13T15:25:10","modified_gmt":"2022-05-13T12:25:10","slug":"currying-at-javascript","status":"publish","type":"post","link":"https:\/\/www.etemkeskin.com\/index.php\/2022\/05\/13\/currying-at-javascript\/","title":{"rendered":"Currying at Javascript"},"content":{"rendered":"\n

Currying<\/strong> is an important technique in functional programming. It is asked as an interview question in many interviews.<\/p>\n\n\n\n

Currying<\/strong> technique is the process of transforming a function so that it is called with a single parameter like f(a)(b)(c)<\/strong> each time, instead of calling it to take multiple parameters as in f(a, b, c)<\/strong>.<\/p>\n\n\n\n

Let’s take a simple look at the following example.<\/p>\n\n\n\n

function sum(a,b,c) {\n    return a + b + c;\n};\nsum(5, 10, 15);<\/pre><\/div>\n\n\n\n
Let’s write the sum()<\/strong> function with the currying technique.<\/p>\n\n\n\n
const sum = (a) => {\n    return (b) => {\n        return (c) => {\n            return a + b + c\n        }\n    }\n}\nsum(5)(10)(15);<\/pre><\/div>\n\n\n\n
As you can see, every time we call the function we just wrote, a new function returns.<\/p>\n\n\n\n
In order to understand the Currying <\/strong>concept well, it is necessary to know the concept of Closure<\/strong> in javascript.<\/p>\n\n\n\n
Advantages<\/h3>\n\n\n\n
  1. By calling the same function partially, we ensure that different results are returned in different parts of the project.<\/li>
  2. We prevent code duplication.<\/li>
  3. We avoid entering the same parameter repeatedly.<\/li><\/ol>\n\n\n\n
    Example:<\/strong><\/p>\n\n\n\n
    const logs = (logType) => {\n  return (logDate) => {\n    console.log(`${logType} : there was an issue on ${logDate}.`);\n  };\n};\n\nconst logDate = logs('Warning');\n\/\/1. Log Message\nlogDate(new Date());\n\/\/2. Log Message\nlogDate(new Date());<\/pre><\/div>\n\n\n\n
    Good Luck…<\/p>\n","protected":false},"excerpt":{"rendered":"
    Currying is an important technique in functional programming. It is asked as an interview question in many interviews. Currying technique is the process of transforming a function so that it is called with a single parameter like f(a)(b)(c) each time, instead of calling it to take multiple parameters as in f(a, b, c). Let’s take […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1,50],"tags":[],"yoast_head":"\nCurrying at Javascript - blog website<\/title>\n<meta name=\"description\" content=\"Currying is an important technique in functional programming. 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