const array = str.split(',');
MDN reference, mostly helpful for the possibly unexpected behavior of the limit parameter. (Hint: "a,b,c".split(",", 2) comes out to ["a", "b"], not ["a", "b,c"].)
const array = str.split(',');
MDN reference, mostly helpful for the possibly unexpected behavior of the limit parameter. (Hint: "a,b,c".split(",", 2) comes out to ["a", "b"], not ["a", "b,c"].)
Watch out if you are aiming at integers, like 1,2,3,4,5. If you intend to use the elements of your array as integers and not as strings after splitting the string, consider converting them into such.
var str = "1,2,3,4,5,6";
var temp = new Array();
// This will return an array with strings "1", "2", etc.
temp = str.split(",");
Adding a loop like this,
for (a in temp ) {
temp[a] = parseInt(temp[a], 10); // Explicitly include base as per Álvaro's comment
}
will return an array containing integers, and not strings.
[javascript] how to effectively convert string to array while removing commas and the space at the beginning/end if there was any?
Convert a String containing commas as separators into an Array
Convert comma separated string to a JavaScript array - Stack Overflow
How to convert a comma-separated string into JS array?
i think this can be done by regEx by i don't how to look it up.
this is a learning project, but i am just thinking about the scale
i have a form where the user enter a bunch of categories and i want the user to separate those categories with a comma, but working on the case where the user add the comma but also a space after the comma (as we all do) or before the comma, how to go about treating this case, because i don't want to end up with two or three categories that are the same.
edit: i did it but i don't want to remove the post to help anyone with the same issue.
here's what i did
const categoriesAsString = e.target.value;
const categoriesTrimmed = categoriesAsString.trim();
const categoriesAsStringWithWhiteSpace = categoriesTrimmed.replace(/\s*,\s*/g,",");
const categoriesAsArray = categoriesAsStringWithWhiteSpace.split(",");
setCategories(categoriesAsArray);
Try:
var initialString = "'California',51.2154,-95.2135464,'data'";
var dataArray = initialString .split(",");
Use the split function which is available for strings and convert the numbers to actual numbers, not strings.
var ar = "'California',51.2154,-95.2135464,'data'".split(",");
for (var i = ar.length; i--;) {
var tmp = parseFloat(ar[i]);
ar[i] = (!isNaN(tmp)) ? tmp : ar[i].replace(/['"]/g, "");
}
console.log(ar)Beware, this will fail if your string contains arrays/objects.
This will convert it into an array (which is the JSON representation you specified):
var array = myString.split(',');
If you need the string version:
var string = JSON.stringify(array);
In JSON, numbers don't need double quotes, so you could just append [ and ] to either end of the string, resulting in the string "[1,4,5,11,58,96]" and you will have a JSON Array of numbers.
For simple array members like that, you can use JSON.parse.
var array = JSON.parse("[" + string + "]");
This gives you an Array of numbers.
[0, 1]
If you use .split(), you'll end up with an Array of strings.
["0", "1"]
Just be aware that JSON.parse will limit you to the supported data types. If you need values like undefined or functions, you'd need to use eval(), or a JavaScript parser.
If you want to use .split(), but you also want an Array of Numbers, you could use Array.prototype.map, though you'd need to shim it for IE8 and lower or just write a traditional loop.
var array = string.split(",").map(Number);
Split it on the , character;
var string = "0,1";
var array = string.split(",");
alert(array[0]);