How to Remove string after string replace

Question

For that code below the output of ins (lets assume the value of keys are summer, spring, fall, winter) is:

['req.body.summer, req.body.spring, req.body.fall, req.body.winter']

What i want is remove the string after the replace command, so i can insert it to my SQLite query. So the output must be:

[req.body.summer, req.body.spring, req.body.fall, req.body.winter]

Im just new into programming so please bear with me. Thank you!

var arr = '';

Object.keys(input).forEach(function(key) {
  arr += 'req.body.' + key + ', ';
});

var ins = [arr.replace(/,\s*$/, '')];

console.log(ins);

If input is an array - hence Object.keys will give "key" as indexes i.e. 0 , 1, 2 .. hence the output will be req.body.0,req.body.1 ..etc — user1428716
– user1428716, Commented Apr 28, 2017 at 4:56
This is not clear: the input is an array of strings? Like 'summer'? — trincot
– trincot, Commented Apr 28, 2017 at 5:01

Sankar · Accepted Answer · 2017-04-28 04:56:41Z

1

Try this...

Just declare arr as an array and Push the values into it.

var arr = [];
var input = ['summer', 'spring', 'fall', 'winter'];
(input).forEach(function(key,value) {
  arr.push('req.body.' + key);
});


console.log(arr);

answered Apr 28, 2017 at 4:56

Sankar

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2 Comments

John Carlo Velasquez Over a year ago

is it possible to remove the string in every element on array?

John Carlo Velasquez Over a year ago

How will i remove the "" in ["req.body.spring"]? I only want [req.body.spring only]. Because in that, it will print the text req.body.spring, what i need is not string, a variable. req.body.spring will get the input value from the EJS. Im very sorry

user1428716 · Accepted Answer · 2017-04-28 05:02:44Z

1

What you are looking for an Array of String Objects

var arr = new Array() ;var input= { 'spring':'a','summer': 'b'}
    Object.keys(input).forEach(function(key) {
      arr.push('req.body.' + key);
    });
    console.log(arr); // Prints ["req.body.spring", "req.body.summer"]

answered Apr 28, 2017 at 5:02

user1428716

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2 Comments

John Carlo Velasquez Over a year ago

How will i remove the "" in "req.body.spring"? I only want req.body.spring only.

user1428716 Over a year ago

@JohnCarloVelasquez - You cannot remove the double quotes. this is a string literal - How do you want to use the Output of the program

trincot · Accepted Answer · 2017-04-28 05:14:59Z

1

If the input is an array of strings, like 'summer', then do this:

var arr = input.map(key => req.body[key]);

// Sample input
var input = ['summer', 'spring', 'fall', 'winter'];

// Sample req:
var req = {
    body: {
        summer: 'sun',
        spring: 'birds',
        fall: 'leaves',
        winter: 'snow'
    }
};

var arr = input.map(key => req.body[key]);

console.log(arr);

If you prefer the function syntax instead of =>:

var arr = input.map(function (key) {
    return req.body[key];
});

edited Apr 28, 2017 at 5:14

answered Apr 28, 2017 at 5:00

trincot

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5 Comments

trincot Over a year ago

It is JavaScript. Did you try to run the snippet? Maybe you don't know the arrow function syntax?

John Carlo Velasquez Over a year ago

Oh sorry, didnt know that, is it possible to remove the stringify of it? i only want [ sun, birds, leaves, snow ]

trincot Over a year ago

What is sun if it is not a string? A variable? If it is a variable, then it will still look up the value of that variable, which again could be a string. Not sure what you want. Console output is a string.

John Carlo Velasquez Over a year ago

How will i remove the "" in ["req.body.spring"]? I only want [req.body.spring only]. Because in that, it will print the text req.body.spring, what i need is not string, a variable. req.body.spring will get the input value from the EJS. Im very sorry

trincot Over a year ago

Please formulate your question clearly. The quotes you see are just representation. They are not actually stored. If the value you want to get is not yet there then process the input later when the values are available.

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