JavaScript Tutorial For Beginners #24 - Strings
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- เผยแพร่เมื่อ 14 ต.ค. 2024
- Hey all, so far we've looked at two data types in JavaScript - Boolean types (true or false) and number types. In this tutorial I want to talk about a third data type - strings. Strings are essentially a string of characters, be them numbers to make a phone number, or letters to make a word or phrase, or even a combo of both.
Strings have a lot of methods (built in functions) you can call on them, and we'll look at a few of them in this tutorial too.
As always, if you have any questions, just fire away :).
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"abc" is greater than "Bcd" because the capital letters comes first in the ASCII Table then the small letters
so that "a" value in ASCII = 97
while "B" = 66
97 > 66
...
Really, really thanks for your tutorials.
You're great
true
I don't understand
when comparing letters they're converted to their ascii numeric value
check this table
www.asciitable.com/
This is utf-8 it is not converting anything to ascii, just to clarify to not confuse others
Yes, is not "stupid" at all. Coming from C let appear JS like a piece of cake ;)
I just wanted to let you know your videos are so incredbily useful! I am in the middle of a career change and start a coding camp for web development next week. I'm very excited for it and you have really helped me learn the fundamentals! Thank you so much!
Awesome, thank you and good luck with everything :)
Thanks Man! I begin to learn and I must say that your videos are so helpful!! :)
I think the uppercase letters being before lowercase comes from their Unicode values rather than JavaScript, and I guess a way to remember it is that you'd always write a capital letter before lowercase letters which come after it.
still watching and learning from this video in 2023, really appreciate your work
var fromMe = "Thanks, mate!"
document.write(fromMe.repeat(10));
"abc" is greater than "Bcd" because of their ascii values
ascii value of a=97
ascii value of B=66
66
hello bhaiya
Capital letters have smaller value than lower letters. So while a < b returns TRUE, a < B returns FALSE.... If it helps to anyone, I put it to my mind like this, imagine you are assigning numbers, starting with the UPPERCASE alphabet, and we contunied assigning numbers for the lowercase charachters. So A 1, B 2, C 3.......Z 26, a 27, b 28, c 29..... So in that case Ben Lim's comment below makes more sense. And also as Ameed mentioned in his comment, but if you dont want to check ascii value. This could be a good way to keep it in mind.
What is the website you referred to with the other methods on strings you didn't include it in your description? Thanks in advance these videos are great!
Totally get what you're saying, but in my opinion, I quite like that lowercase letters are greater than their capital letter counterparts. By now camel case has become embedded in my head wherein lowercase always precede uppercase e.g., camelCaseLetters. Maybe this will help other people remember as well :)
Instead of typing myString = 'I\'m a "fun" string' and having to deal with the escape character, single and or double quotes you could type myString = "I’m a “fun” string" provided that the used font includes the typographically correct symbols for apostrophe and quotation marks. How to enter these symbols depends on the operating system used. You can look it up online how to do that.
Sound of your keyboard is very nice :D. Great work dude.
abc>Bcd Because ASCII Code value of "a" is greater than "B".
var explanation = great;
console.log(explanation);
ohh joss !
In case anyone didn't know, when comparing single alphabets (z or Z) has the highest value. With lower case having the highest value. Try this out in console:
e.g 1
var a = "z"
var b = "a"
a > b = true
e.g 2
var a = "Z"
var b = "A"
a > b = true
var a = "z"
var b = "ABCDE"
a > b = true
Ben Lim its based on their ascii values
Check the table
Do you use books or documentation ?
8:00
Why did you put .toLowerCase with string1 if the string is already lower case?
Just curious.
lets just say you did not know what var string1 was going to be, you would use that so it will not matter if the user puts capson or off bc everything will be turned into lower case
for IndexOf - Index is starting from 0 , am I right?
Correct :)
Yes...the net ninja spelled it incorrectly...he started from 1
+thenetninja What line of code will give you a random number between 1 and 30 (for example) in JavaScript?
Unfortunately you have to create your own function:
function getRand (min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
And for number between 1 and 30 you call this function like this: getRand(1, 30);
// returns random integers between 1 and 9
document.write(Math.floor(Math.random() * 10));
how to display a variable inside quotation mark in JS
"abc" < "Bcd" is true not because javascript or any other language is stupid. It is because of ASCII value comparison of literals in which lower case are marked higher.
I noticed that U use MDN
"I ain't not no undummy"
-Homer Simpson
The way you said stupid😅
there is always one unlike ... some mad ex-gf ? :D
whaa
i need this songs
I’m crying
ok my friend thats not a backslash,, thats a fowardslash,,
Haha yeah, my mistake XD
Mr.Ninja none of the above worked, only .indexOf()