如何在javascript中的字符串中的每个单词的开头添加一个字符？

Question

I have a string for example

some_string = "Hello there! How are you?"

I want to add a character to the beginning of every word such that the final string looks like

some_string = "#0Hello #0there! #0How #0are #0you?"

So I did something like this

temp_array = []

some_string.split(" ").forEach(function(item, index) {
    temp_array.push("#0" + item)

})

console.log(temp_array.join(" "))

Is there any one liner to do this operation without creating an intermediary temp_array ?

Answer 1

You could map the splitted strings and add the prefix. Then join the array.

 var string = "Hello there! How are you?", result = string.split(' ').map(s => '#0' + s).join(' '); console.log(result);

Answer 2

You could use the regex (\\b\\w+\\b) , along with .replace() to append your string to each new word

\\b matches a word boundry

\\w+ matches one or more word characters in your string

$1 in the .replace() is a backrefence to capture group 1

 let string = "Hello there! How are you?"; let regex = /(\\b\\w+\\b)/g; console.log(string.replace(regex, '#0$1'));

Answer 3

You should use map() , it will directly return a new array :

let result = some_string.split(" ").map((item) => {
    return "#0" + item;
}).join(" ");

console.log(result);

Answer 4

You could do it with regex:

 let some_string = "Hello there! How are you?" some_string = '#0' + some_string.replace(/\\s/g, ' #0'); console.log(some_string);

Answer 5

The simplest solution is regex. There is already regex soln give. However can be simplified.

 var some_string = "Hello there! How are you?" console.log(some_string.replace(/[^\\s]+/g, m => `#0${m}`))

Answer 6

const src = "floral print";
const res = src.replace(/\b([^\s]+)\b/g, '+$1');

result is +floral +print useful for mysql fulltext boolean mode search.