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javascript Programming Glossary: numericHow to detect if a variable is an array http://stackoverflow.com/questions/1058427/how-to-detect-if-a-variable-is-an-array or node lists. As all array like objects must have a numeric length property I'd check for these like this typeof obj 'undefined'.. to know is whether you can iterate over the object via numeric indices. Therefore it might be a good idea to check if the object..
sort not working with integers? http://stackoverflow.com/questions/1063007/sort-not-working-with-integers the sort method sorts elements alphabetically. To sort numerically just add a new method which handles numeric sorts sortNumber.. To sort numerically just add a new method which handles numeric sorts sortNumber shown below function sortNumber a b return..
Access / process (nested) objects, arrays or JSON http://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json types expose a key value structure. Keys in arrays must be numeric whereas any string can be used as key in objects. The key value..
JavaScript - Are loops really faster in reverse…? http://stackoverflow.com/questions/1340589/javascript-are-loops-really-faster-in-reverse see if it's finished and it just checks against the final numeric value. I.e. for var i count 1 i 0 i count is only evaluated..
Validate numbers in JavaScript - IsNumeric() http://stackoverflow.com/questions/18082/validate-numbers-in-javascript-isnumeric IsNumeric function to find out if a variable contained a numeric value regardless its type it could be a String containing a.. regardless its type it could be a String containing a numeric value I had to consider also exponential notation etc. a Number.. coercion eg. true 1 but true shouldn't be considered as numeric . I think is worth sharing this set of 30 unit tests made to..
Loop through array in JavaScript http://stackoverflow.com/questions/3010840/loop-through-array-in-javascript is not guaranteed the array indexes may not visited in the numeric order. Inherited properties are also enumerated. The second..
How do I get the difference between two Dates in JavaScript? http://stackoverflow.com/questions/41948/how-do-i-get-the-difference-between-two-dates-in-javascript by calling the getTime method or just using the date in a numeric expression. So to get the difference just subtract the two dates...
HTML Text Input allow only Numeric input http://stackoverflow.com/questions/469357/html-text-input-allow-only-numeric-input to set an HTML text input input type text to only allow numeric keystrokes plus '.' javascript html dhtml share improve this..
Why is using “for…in” with array iteration such a bad idea? http://stackoverflow.com/questions/500504/why-is-using-for-in-with-array-iteration-such-a-bad-idea resizes the array. for var i 0 i a.length i Iterates over numeric indexes from 0 to 5 as everyone expects. can sometimes be totally..
Are there are any side effects of using this method to convert a string to an integer http://stackoverflow.com/questions/8112757/are-there-are-any-side-effects-of-using-this-method-to-convert-a-string-to-an-in are signed bitwise operations and will always return a numeric value zero instead of NaN . n 0 is also a bitwise operation.. use which method parseFloat x when you want to get as much numeric results as possible for a given string . parseFloat x '' .replace.. x '' .replace ^ ^0 9. '' when you want even more numeric results. parseInt x 10 if you want to get integers. x 1 x ....
What is the difference between an array and an object? http://stackoverflow.com/questions/874205/what-is-the-difference-between-an-array-and-an-object This should be considered harmful though. Arrays are for numerically indexed data for non numeric keys use an Object. Here's.. though. Arrays are for numerically indexed data for non numeric keys use an Object. Here's a more concrete example why non numeric.. keys use an Object. Here's a more concrete example why non numeric keys don't fit an Array var myArray Array myArray 'A' Athens..
For each in an array. How to do that in JavaScript? http://stackoverflow.com/questions/9329446/for-each-in-an-array-how-to-do-that-in-javascript inherits from its prototype and That the key is a base 10 numeric string in its normal string form and its value is 2^32 2 which..
What does `1..something` mean in JavaScript? http://stackoverflow.com/questions/2300197/what-does-1-something-mean-in-javascript undefined . Why The first dot ends a representation of a Numeric Literal giving you a Number primitive var n 1. The grammar of.. giving you a Number primitive var n 1. The grammar of a Numeric Literal is expressed like this DecimalIntegerLiteral . DecimalDigitsopt..
javascript multidimensional array? http://stackoverflow.com/questions/2529865/javascript-multidimensional-array index you can also do that var countryInfo IBANInfo 0 Numeric lookup alert Country name countryInfo.countryName Also alerts..
string to int use parseInt or Number? http://stackoverflow.com/questions/4090518/string-to-int-use-parseint-or-number 0xF 15 In addition a widely used construct to perform Numeric type conversion is the Unary Operator it is equivalent to using..
How to tell if a string contains a certain character in javascript? http://stackoverflow.com/questions/4444477/how-to-tell-if-a-string-contains-a-certain-character-in-javascript
HTML Text Input allow only Numeric input http://stackoverflow.com/questions/469357/html-text-input-allow-only-numeric-input Text Input allow only Numeric input Any quick way to set an HTML text input input type text..
JavaScript multidimensional array http://stackoverflow.com/questions/7545641/javascript-multidimensional-array index you can also do that var countryInfo IBANInfo 0 Numeric lookup alert Country name countryInfo.countryName Also alerts..
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