The following script prints undefined to the console for each character in the string, but works correctly in Chrome.
<script>
function main()
{
var x = "hello world";
for ( var i = 0; i < x.length; ++i ) {
console.log( x[i] );
}
}
main();
</script>
Do I have to do something to the array in order to get this to work properly in all browsers?
The [] is supported in some browsers but not all:
Array-like character access (the second way above) is not part of ECMAScript 3. It is a JavaScript and ECMAScript 5 feature.
For maximum compatibility, use String.charAt() instead:
<script>
function main()
{
var x = "hello world";
for ( var i = 0; i < x.length; ++i ) {
console.log( x.charAt(i) );
}
}
main();
</script>
[] perfectly also for string, see my answerOlder versions of IE don't support the array notation (string[x]) to access strings, use: charAt() instead.
<script>
function main() {
var x = "hello world";
for ( var i = 0; i < x.length; ++i ) {
console.log( x.charAt(i) );
}
}
main();
</script>
Also, if you're directly executing your function, you could as well create a self-executing anonymous function (to preserve the scope / not pollute the global namespace)
<script>
(function main() {
var x = "hello world";
for ( var i = 0; i < x.length; ++i ) {
console.log( x.charAt(i) );
}
}());
</script>
Unless you have to run it from somewhere else also, of course.
console.log()console object is only IE10, I tested this, or see Microsoft reference if you don't trust: msdn.microsoft.com/en-us/library/hh772192(v=vs.85).aspxundefined to the console" MS can tell me the console object doesn't exist 'till IE10, but they've been wrong before. I'm console.log()-ing to all my delight in IE8, and there's nothing MSDN can do about that.It's console the problem here. This object does not exist in IE Javascript engine.
If you do this it works in both
<script>
function main()
{
var x = "hello world", result = "";
for ( var i = 0; i < x.length; ++i )
result += x[i];
document.write(result); //it prints "hello world" on page
}
main();
</script>
EDIT:
console object does not exists until IE10 (as correctly noted by Cerbrus, unless you turn on the IE developer tool, in such case it exists also on IE8)[] to access strings chars can be used in IE8+ (on IE7 it does not work yet)console.log. They won't support array-like access of strings, either.[], they do not need charAt. That's why I suppose the user issue is with console.log here.
console does exits in IE8/9 if the user has the development tools installed.If you use the following code, try to increase TimeOut value to maximum...
window.setTimeOut('Your Js function(), 150)
Now, it increase to
window.setTimeOut('Your Js function(), 2000)
