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I have a two textbox and i want to convert string value such as "apple" and "cat" into appropriate integer value using javascript.
Simple...
var myInt = "cat";
var converted = parseInt(myInt, 10);
console.log(converted);
>>NaN
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I need to find difference between two strings.
string newemails = peter#xyz.com,john#xyz.com,harry#xyz.com,prince#xyz.com;
string oldemails = peter#xyz.com,john#xyz.com,johnson#xyz.com,harry#xyz.com,prince#xyz.com;
The expected output is johnson#xyz.com and log it to the new string.
Is there any way to do this in JavaScript?
You can split the strings by comma, then filter out the newemails from the oldemails:
var newemails = 'peter#xyz.com,john#xyz.com,harry#xyz.com,prince#xyz.com';
var oldemails = 'peter#xyz.com,john#xyz.com,johnson#xyz.com,harry#xyz.com,prince#xyz.com';
var newemailsArr = newemails.split(',');
var diff = oldemails.split(',').filter(m => !newemailsArr.includes(m)).join(',');
console.log(diff);
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I have a mobile no like (408) 931-4377 and need to create a format like (000) 000-0000 for validating other mobile nos
Please suggest how this can be achieved?
Use String.replace in javascript
Reference
const number = "(408) 931-4377";
console.log(number.replace(/[0-9]/g, "0"));
Use Regular Expressions for this Validation.
const number = "(408) 931-4377";
const mobilecheck = RegEx(/^(\([0-9]{3}\) |[0-9]{3}-)[0-9]{3}-[0-9]{4}$/);
if(mobilecheck.test(number)){
// do something
}
else{
// do something
}```
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In python, I can join elements in an array by doing:
print(a)
b=' '.join(a)
print(b)
and I get:
['hhhh', 'hhhh']
hhhh hhhh
How would I do this in js?
It's the same thing, man!
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join
b = a.join(' ')
If you want join arrays:
let a ='hhhh';
let b = [].concat(a);
b.concat(a)
If you want to join string
let sth = "a" + " b";
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What I have:
add-category
add-exam
a-category1
a-category2
...
a-category[n]
What I need:
I need to cut string on two parts as 'a-category' and '1' or just 'add-exam' if no digit in row.
let str = 'a-category2';
let splitStr = str.split(/(\d+)/);
console.log('string--->' + splitStr[0]);
console.log('digit---->' + splitStr[1]);
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^[a-zA-Z]\w+#[a-zA-Z_]+?\.[a-zA-Z]{2,4}$
i had tried this regex for email but it allow following cases
123#mail.com
example.mail#mail.com
Here is the code which searches for the number at the start.
If number is matched it prints message in console.
let regex = /^[0-9]/;
let object = [{email:'123#mail.com'},{email:'example.mail#mail.com'}];
for(let i =0;i<object.length;i++){
if(object[i].email.match(regex)){
console.log('E-mail ',object[i].email,' is not valid.')
}
}
This is the used regex: ^[0-9]