如何在 React Native 的索引基础上将一个数组值分成两个字符串

Question

这是我的代码，我试图将一个全名分成 firstName 和 lastName 两部分。但它不符合我的需要。Like if   fullName='Sachin Ramesh Tendulkar' . thenfirstName = Sachin RamesnlastName = Tendulkar   iffullName='Sachin Tendulkar' . thenfirstName = Sachin  lastname = Tendulkarif fullName='Sachin  Ramesh Tendulkar Second' . thenfirstName =Sachin  Ramesh TendulkarlastName= Second   this.state={    fullName:'Sachin Ramesh Tendulkar'    let fullName = this.state.fullName.split(' ');    const firstName = fullName.shift()    const lastName = fullName.join(' ')    --------------------------------------------    firstName = Sachin    lastName = Ramesh Tendulkar .    but I have to show the result like below ..    ------------------------------    firstName = Sachin Ramesh    lastName = Tendulkar     请建议。谢谢

Answer 1

你可以这样做： -

[fName, mName, lName] = nameString.split(" ");

if(!lName) lName = mName

else fName = fName+mName

因此，如果姓氏为 null 或未定义，那么我们将中间名值分配给姓氏。否则名字将等于名字 + 中间名。

Answer 2

这个怎么样？

const name = "Sachin Ramesh Tendulkar"

const lstSpc = name.lastIndexOf(" ")

const nameParts = [name.substring(0, lstSpc), name.substring(lstSpc)] 

console.log(nameParts)

Answer 3

尝试这个。

name = 'ABC XYZ GHI';

array = name.split(' ');

lastName = array.pop()

firstName = array.join(' ')

Answer 4

久经考验

 const name = "Sachin Ramesh Tendulkar"

        const array  = name.split(' ')

        let firstname = ''

        let lastname = ''

        if (array.length && array.length > 1) {

            array.forEach((item, i)  => {

                if ((array.length - 1) !== i) {

                    if (firstname) {

                        firstname = firstname + " " + item

                    } else {

                        firstname = item

                    }

                    

                }

            })

             lastname = array[array.length - 1]

        }

        if (array.length === 1) {

        firsname = array[0]

        }

Answer 5

var fullName = "Sachin  Ramesh Tendulkar Second";

var firstName = fullName.substring(0, fullName .lastIndexOf(" ") + 1);

var lastName = fullName.substring(fullName .lastIndexOf(" ") + 1);

console.log(`firstName: `, firstName);

console.log(`lastName: `, lastName);

Answer 6

shift将删除第一个元素。我认为您想要的是pop获取最后一个元素以隔离姓氏。请注意，这些是直接突变

var fullName = "Sachin  Ramesh Tendulkar Second".split(' ');

var lastName = fullName.pop();

var firstName = fullName.join(' ');

console.log(`firstName: `, firstName);

console.log(`lastName: `, lastName);