The charAt() method is used to provide a single character by its index within a string.
The charAt() method is used to provide a single character by its index within a string.
Questions tagged [charat]
261 questions
15
votes
8 answers
Possible problems with String reversing using charAt method
I saw a comment here that all solutions with charAt are wrong. I could not exactly understand and find something about charAt on internet. As I look the source code it just returns an element from the char array. So my question is that if there any…
user1474111
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15
votes
2 answers
innerHtml prepend text instead of appending
I have a function that emulates typing with few lines of basic JavaScript code, however it appends text, but I want to prepend text to the element before any other already existing text/elements without changing html structure.
How this can be…
vlad
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9
votes
3 answers
traverse a string char by char javascript
function SimpleSymbols(str) {
var letter =['a','b','c','d','e','f','g','h','i','j',
'k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
var newstr = "";
for (var i = 0; i
Michael Sacks
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7
votes
5 answers
Java String/Char charAt() Comparison
I have seen various comparisons that you can do with the charAt() method.
However, I can't really understand a few of them.
String str = "asdf";
str.charAt(0) == '-'; // What does it mean when it's equal to '-'?
char c = '3';
if (c < '9') // How…
Kcits
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7
votes
3 answers
How can I check if the char array has an empty cell so I can print 0 in it?
Code:
public void placeO(int xpos, int ypos) {
for(int i=0; i<3;i++)
for(int j = 0;j<3;j++) {
// The line below does not work. what can I use to replace this?
if(position[i][j]==' ') {
…
steven1816
- 105
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5
votes
4 answers
Counting the number of specific occurrences in a java String
I am attempting to solve a problem where I create a method that counts the number of occurrences of capital and lowercase ("A" or "a") in a certain string. I have been working on this problem for a week now, and the main error that I am receiving is…
J. Doe
- 146
- 5
5
votes
3 answers
Java += operator on String with charAt() methods results in char addition
I'm working through the problems on Codingbat.com and bumped into the fact that for the += operator, a += b isn't necessarily exactly equal to a = a + b. This is well known and has been discussed on SO before, but I bumped into something strange…
jodles
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5
votes
1 answer
Javascript charAt() breaking multibyte character string
This code breaks with nodejs v0.10.21
#!/usr/bin/env node
"use strict";
var urlEncoded = 'http://zh.wikipedia.org/wiki/%F0%A8%A8%8F';
var urlDecoded = decodeURI( urlEncoded );
var urlLeafEncoded = urlEncoded.substr( 29 );
var urlLeafDecoded =…
user2949756
- 51
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4
votes
3 answers
How does the charAt() method work with taking numbers from strings and putting them into new strings in Java?
public String getIDdigits()
{
String idDigits = IDnum.charAt(0) + IDnum.charAt(IDnum.length() - 1) + "";
return idDigits;
}
In this simple method, where IDnum is a 13 digit string consisting of numbers and is a class…
Scuffed Newton
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4
votes
4 answers
Converting String (containing characters and integers) to integers and calculating the sum in JAVA
This method calculates the sum of all digits in a String of length 10. The String has to be of the form "12345?789x" or "12?4567890", where '?' can lie anywhere and has a value of 0, 'x' (if present) lies at the end of the String and is equal to…
ryan321
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4
votes
1 answer
In PHP substring return �� these type of character?
I want to get the first character of a string in PHP. But it returns some unknown character like �. Why does that happen?
$text = "अच्छी ाqस्थति में"; // Hindi String
$char = $text[0]; // $text{0}; also try here .
echo $char; // output like…
Gunjan Patel
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4
votes
2 answers
if charAt equal to a list of characters
I want something like the following in Javascript
if str.charAt(index) (is in the set of) {".", ",", "#", "$", ";", ":"}
Yes, I know this must be simple, but I can't seem to get the syntax right. What I have now is
theChar = str.charAt(i);
if…
lbutlr
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3
votes
2 answers
Title Case JavaScript
I am trying to create a function in which after toLowerCase() input, will then capitalize the first letter in each element of an array.
function title_case ( String ) {
var result = "";
var text = String.toLowerCase().split(" ");
for…
Kitty
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3
votes
1 answer
Use string methods to find and count vowels in a string?
When my code compiles it is giving me multiple outputs of my vowels. Almost like its giving me an output after it checks each character. how do i make it give just one output with all my vowels and others. in 1 output??
Please help...
import…
Savage99
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3
votes
3 answers
How to find text between less and greater than, then strip the <> in Java?
I don't know how to find these words.. example I have this text...
The other day I went to the and bought some . Afterwards, I went to , but it was very so I left quickly and went to .
I…
Storm Spirit
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