2012年6月15日 · That's the function I wrote to get string in Unicode characters: function nbUnicodeLength(string){ var stringIndex = 0; var unicodeIndex = 0; var length = string.length; var second; var first; while (stringIndex < length) { first = string.charCodeAt(stringIndex); // returns an integer between 0 and 65535 representing the UTF-16 code unit at the given index.

Since javascript is zero-indexed , in order to loop through an entire array, you can either set the maximum bound as i<array.length OR i<=array.length-1 – stark Commented Jan 26, 2016 at 21:47

2009年6月25日 · UTF-16, the string format used by JavaScript, uses a single 16-bit code unit to represent the most common characters, but needs to use two code units for less commonly-used characters, so it's possible for the value returned by length to not match the actual number of characters in the string.

2015年10月22日 · To Get the string length of a value for example: var value="This is a string"; var string_length=value.length; /*The string length will result to 16*/ Hope this helps

2012年3月6日 · There's no length method in built-in javascript objects, but accessing object property is often slower than accessing local variable. – kirilloid Commented Mar 6, 2012 at 21:39

2014年11月15日 · I want to know how this is implemented. Does Javascript calculates the length property when it is called? Or it is just a static property which is changed whenever the array is changed. My question is asked due to the following confusion in best-practices with javascript: for(var i = 0; i < obj.length; i++) { }

2014年12月1日 · This question is confusing. A regular object, {} doesn't have a length property unless you're intending to make your own function constructor which generates custom objects which do have it ( in which case you didn't specify ). Meaning, you have to get the "length" by a for..in statement on the object, since length is not set, and increment a ...

2012年6月8日 · Ok, so many answers, but this is a pure math one, just for the fun or for remembering that Math is Important: ...

2011年7月20日 · i have a JSON object that gets returned by an AJAX request and I am having some trouble with the .length because it keeps returning undefined. Just wondering if I'm using it right: console.log(data.length); console.log(data.phones.length); They both return undefined even though they are valid objects. Update: Sample of the JSON object returned:

2015年4月7日 · I wonder why console says 'Cannot read property 'length' of undefined' when I combine two if conditions together?