parsefloat

问题 I wrote a function that behaves differently depending on the numeric type of it's parameters. Integer or float. Using some code from this question How do I check that a number is float or integer? it was easy to detect if float or not but then I stumbled upon the case that javascript casts 1.0 to 1 without cause if you call a function using that number. Example: function dump(a, b) { console.log(a, typeof b, b); } dump('1', 1); dump('1.0', 1.0); dump('1.1', 1.1); Output chrome, firefox, ie,

问题 How would it be a nice way of handling this? I already thought on removing the comma and then parsing to float. Do you know a better/cleaner way? Thanks 回答1: Nope. Remove the comma. 回答2: parseFloat( theString.replace(/,/g,'') ); 回答3: I don't know why no one has suggested this expression- parseFloat( theString.replace(/[^\d\.]/g,'') ); Removes any non-numeric characters except for periods. You don't need custom functions/loops for this either, that's just overkill. 回答4: You can use the string

问题 Hi I have a string of numbers separated by commas, "100,200,300,400,500" that I'm splitting into an array using the javascript split function: var data = []; data = dataString.split(","); I'm trying to parse the values of the array using parseFloat and then store them back into the array. I'd then like to add up the numbers in the array and store it as another variable, "dataSum". I've got the following code, but I can't get it working: var dataSum = ""; for (var i=0; i < data.length; i++) {

问题 Free jqgrid contains 3 columns: Price, Quantity and Sum. html5 number input type is used. If Sum column is changed in inline edit, Price column value should calculated using formula Price = Sum / Quantity; I tried to implement this using jqgrid template below but it does not change price column since input#Price and input#Quantity are undefined. Element ids are created from row id and are different in every row. Jqgrid does not pass row id value to change event. Which is best practice in free

问题 I am attempting to develop a conversion website that takes a numeric value: 1,200.12 or 1.200,12 or 1200.12 or 1200,12 and have them all interpreted as 1200.12 by parseFloat. I would also like decimals to be able to be interpreted. 0.123 or 0,123 as 0.123 through a textarea and then parseFloat the number in order to perform calculations. These are the results I am getting: textarea input = 12,000.12 value after parseFloat = 12 Does parseFloat not recognize the formatting of the numbers? i get

问题 I display some prices and numbers from server with PHP, using functions to format in french. Then I want to use Jquery to do some calculations client-side. I use .toLocaleString('fr-FR') to format the results to show. It works in console but not in DOM. Here is the code: resultat_partiel = 1; resultat_partiel *= parseFloat($(this).text().replace(/ /g, ''), 10); console.log(resultat_partiel, resultat_partiel.toLocaleString('fr-FR')); $('div.resultat_partiel').text(parseFloat(resultat_partiel)

问题 I am trying to split an array of strings, called 'vertices' and store it as an array of floats. Currently the array of strings contains three elemets: ["0 1 0", "1 -1 0", '-1 -1 0"] What I need is an array of floats containing all these digits as individual elements: [0, 1, 0, 1, -1, 0, -1, -1, 0] I used the split() function as follows: for(y = 0; y < vertices.length; y++) { vertices[y] = vertices[y].split(" "); } ...which gives me what looks to be what I am after except it is still made up

问题 I am very new to javascript as I am currently making a cross platform web app in jQuery Mobile, I have used the example of XML Parsing to a HighCharts graph yet when I encounter a null in my series data it fails to draw any of the line and makes it into a scatter plot almost. // push data points $(series).find('data point').each(function(i, point) { seriesOptions.data.push( parseFloat($(point).text()) ); }); I have no idea how to write a if statement that checks to see if it found a null and

问题 When I am adding two textbox values that are 1.001 and 0.001 and then I do a parseFloat I get 1.0019999999 . I want it 1.002 . Can you help me? 回答1: The Javascript Number class has a toFixed() function that will get you what you want. So you could do parseFloat("1.0019999").toFixed(3) and that would give you 1.002 . The parameter (3 in this case) is the number of digits to show after the decimal point 回答2: 0.002 cannot be accurately represented as a base 2 number. Similar to the way that 1/3

问题 How would I round off a value from a textfield with a parseFloat result in it? This application basically sums up the value of all radio buttons when clicked and displays the sum in a textbox. The code below works perfectly if the radio button value is an integer, however if I want to have a floating point value on the radio button, the total value will have a 100.0000000679 when it should be 100 . Any tips would be very much appreciated. Thanks in advance. function calcscore(){ var score = 0