I am trying to get text from an array except year,month,date using javascript.I do not know how do it.
var arr = [
"power-still-rate-19.08.22",
"main-still-rate-19.08.22",
"oil-power-rate-19.08.22",
"oil-mill-rate-19.7.2"
];
var result;
for (var i = 0; i < arr.length; i++) {
result = arr[i].remove('?????????');
}
console.log(result);
//result should be like = power-still-rate,main-still-rate,oil-power-rate ;Split, slice and join
var arr = ["power-still-rate-19.08.22", "main-still-rate-19.08.22", "oil-power-rate-19.08.22","oil-mill-rate-19.7.2"];
var result = arr.map(item => item.split("-").slice(0,-1).join("-"))
console.log(result);Split, pop and join
var arr = ["power-still-rate-19.08.22", "main-still-rate-19.08.22", "oil-power-rate-19.08.22","oil-mill-rate-19.7.2"];
var result = arr.map(item => { let res = item.split("-"); res.pop(); return res.join("-") })
console.log(result);No map:
var arr = ["power-still-rate-19.08.22", "main-still-rate-19.08.22", "oil-power-rate-19.08.22","oil-mill-rate-19.7.2"];
var result = arr.join("").split(/-\d{1,}\.\d{1,}\.\d{1,}/);
result.pop(); // last empty item, not needed if you do not want an array just join with comma
console.log(result);Use a regular expression to match non-digit characters from the start of the string, followed by - and a digit:
const input = ["power-still-rate-19.08.22", "main-still-rate-19.08.22", "oil-power-rate-19.08.22","oil-mill-rate-19.7.2"];
const output = input.map(str => str.match(/\D+(?=-\d)/)[0]);
console.log(output);
Using split on - ,splicing the last element which is the date and joining on -
var arr=["power-still-rate-19.08.22","main-still-rate-19.08.22","oil-power-rate-19.08.22"];
arr.forEach(function(e,i){
arr[i]=e.split('-').splice(0,3).join('-')
})
console.log(arr)You can remove back string by using slice function and join them with join function.
var arr = ["power-still-rate-19.08.22", "main-still-rate-19.08.22", "oil-power-rate-19.08.22","oil-mill-rate-19.7.2"];
var result = arr.map(str => str.slice(0, str.lastIndexOf('-'))).join(',');
console.log(result);You can use String#replace method to remove certain pattern from string using RegExp.
const input = ["power-still-rate-19.08.22", "main-still-rate-19.08.22", "oil-power-rate-19.08.22","oil-mill-rate-19.7.2"];
const res = input.map(str => str.replace(/-\d{1,2}\.\d{1,2}\.\d{1,2}$/, ''));
console.log(res);