I'm trying to extract specific numbers from a string but I'm not sure how to execute it.
The string is of the form:
center=43.571464,7.129565&zoom=12&size=480x225&markers=color:red%7Clabel:1%7C43.580293713725936,7.115145444335894&markers=color:red%7Clabel:2%7C43.56512073056565,7.121668576660113&sensor=false
The array I want is the marker coordinates near the end, specifically:
[43.580293713725936,7.115145444335894,43.56512073056565,7.121668576660113]
I thought I could pick these number out using their precision (15) but I don't know if that's best. I'm a hack when it comes to using regular expressions. Right now the best I've got is:
str.match(/[-+]?[0-9]*\.?[0-9]+/g)
But that just gives me all of the numbers.
Help much appreciated!
If your string is in str use this regex.
var coordinates = decodeURIComponent(str).match(/([\d.]{10,})/g);
http://jsfiddle.net/CHfcT/
You could try using the following regex
/\d+\.\d{7,}/g
This assumes that:
The marker coordinates always have 7 or more numbers after the dot
No other part of the string contains a similar pattern with more than 7 numbers after a dot
Example (JSFiddle):
str.match(/\d+\.\d{7,}/g);
The reason I picked 7 was because the other numbers in the sample had 6, so that excludes them. If you know that the coordinates always have a fixed number of decimal places, then you could just use that specific number without the , like this:
/\s+\.\d{10}/g
Related
In JS, I do have a float number which come from php as below:
var number = 2,206.00
In JS, I need to use parseFloat that number.
So I tried parseFloat(number), but its give only 2. So how can I get 2206.00 instead of 2?
Number.parseFloat is the same function object as globalThis.parseFloat.
If globalThis.parseFloat encounters a character other than:
a plus sign or,
a minus sign or,
a decimal point or,
an exponent (E or e)
...it returns the value up to that character, ignoring the invalid character and characters following it. A second decimal point also stops parsing.
So the following prints 2. And this seems to be your problem.
console.log(parseFloat('2,206.00')) // 2
Solution: use string manipulation to remove any commas from the number (really a String before parsing it.
console.log(parseFloat('2,206.00'.replaceAll(',', ''))) // 2206
If you need to store the value as a number but render it as a formatted string, you may need Number#toFixed to render the values after the decimal point:
console.log((2206).toFixed(2)) // '2206.00'
Final note: be careful about localization because some countries use commas for decimal points and decimal points for number grouping. As #t.niese says: store number values without localization, and then apply localization at the surface of your app. But that is a wider, more complicated topic.
You have to remove comma first and use parseFloat.
And about 2 decimal after dot, I see you use number_format($myNumber, 2) in PHP, so in JS, you use .toFixed(2).
var number = '2,206.00';
var result = parseFloat(number.replace(/,/g, '')).toFixed(2);
console.log(result);
First of all what you currently have most probably would trigger an Unexpected number error in JS.
It seems the generated value comes from the number_format() PHP function which returns a string. Moreover the var number variable should also be considered a string as we have a string format.
So firstly you should quote var number = '2,206.00' after that, you have to make the string float-like in order to parse it as float so we should replace , with empty string in order for the number to become 2206.00 number = number.replace(",",""). Lastly the parse should be done now in order to convert the float-like string to an actual float parseFloat(number).
Whole code:
var number = '2,206.00';
number.replace(",","");
number = parseFloat(number);
ok, basically you want a two decimal number after point like (20.03),
try this
parseFloat(number).toFixed(2)
i have a Javascript file that calculates and parse the rows in a crm module called jobs.
I have function called recalculateSummary that calculate the price like this
I want it to show 3,578.00 in total like Line Total
The problem is the function parseFloat i think it ignores the ',' as i want if i write 3,578.00 the total should be 3,578.00.
I was able to achive this by removing parseFloat function and removing the ReplaceAll function but i got error when i add more rows the total value becomes 0.00.
recalculateSummary: function(){
var subtotal = 0;
$.each($('.row_line_total'), function(index,value){
lineTotal = $(value).html().replaceAll(',','.').replaceAll(' ','');
subtotal += parseFloat(lineTotal);
});
i know the question isn't clear but i need some help
Are trying to add toFixed(2) for calculation result?
I mean this:
$('.summary_subtotal').html($.number(subtotal,2));
->
$('.summary_subtotal').html($.number(subtotal.toFixed(2),2));
The reason is that by replacing the comma with the dot, parseFloat will interpret that as the decimal separator and so your number suddenly is a factor of 1000 smaller.
Take for example 3,578.00
Your code will grab that value as a string with $(value).html().
This is OK, although it would be better to do $(value).text() as
you are not really interested in HTML encoding, but plain text.
Then the code performs a disastrous replacement with
.replaceAll(",", "."). This will turn the string to "3.578.00"
(Not good!).
Finally the code converts this string to number with parseFloat.
The first dot is interpreted as decimal separator, not as thousands
separator (which it originally was). The second dot cannot be
interpreted as part of the number, and so parseFloat returns a
number with value 3.578. You probably have some other mechanics in
place to only display 2 decimal digits, so this value ends up on the
page as 3.58 (rounded).
In order to fix this problem, replace this:
lineTotal = $(value).html().replaceAll(',','.').replaceAll(' ','');
with:
lineTotal = $(value).text().replace(/[^.\d]/g, '');
Here we remove anything that is neither a dot (.), nor a digit (\d), using a regular expression: [^.\d]. So now the example value will become "3578.00" (the thousands separator is removed). parseFloat will turn this string into the number 3578. Your rendering mechanics will possibly render that with two decimals and a thousand separator as 3,578.00
All in all it is better to write your logic based on numeric variables and only use the DOM elements for output, not to read values from it (which are already formatted).
I have defined an input in HTML that represents a number. I need to parse the string in JavaScript to a number taking into consideration the different languages that will be entered by the user, for example: '1.34' in English will be written as '1,34' in French. parseFloat('1,344') will be return 1 in case we are in English standard.
You could probably find a library for it, but you can also pretty easily format the numbers into the wanted format yourself.
When you get a number from the input just convert it to string and then use the indexOf() function (http://www.w3schools.com/jsref/jsref_indexof.asp) to see if there's a comma or a dot in the number. It returns the position index of that element in a string so you can then replace with the wanted one to format the number. Position will be -1 if there is no dot/comma.
var num = 32.14;
var string = String(num);
var position = string.indexOf(".");
Hope this helps you.
If it's only those two representations you consider, then another easy solution is to always do
var floatNum = num.replace(/,/g,".");
and then just treat it like any float number.
Unless you really need it for other number systems I'd avoid using a library. Libraries tend to be too big for most projects to utilize properly in my opinion.
I have
var value = $120,90
var value = $1,209.00
currently I replace the first case with
value = value.replaceAll(",", ".").replaceAll("[^0-9.]*", "");
which gives me that I am looking for: the integer 12090
with the second case I run in a problem however like this. How can I solve this in Javascript?
You may modify you regexp.
value = value.replace(/,/g, ".").replace(/^\D|\.(?!\d*$)/g, "");
First will replace ',' to '.' and the 2nd replace NON-digit symbols in the beginning of the string and all dots EXCEPT the last one with the empty string. Then use parseFloat.
To be sure completely it's better to create a template for data input and don't allow users to enter values in an invalid format.
I cannot see how you can make an algorithm work unless you insist that everyone enters dollars and cents. The only option I can think of is to use locale to determine the number separator.
Could you use the answer from this thread?
How can I remove the decimal part from JavaScript number?
They use Math.floor() (round down), Math.ceil() (round up) or Math.round() (round to nearest integer).
Im using parseFloat on very high numbers or very low numbers.
The return value is like 123*10e15 , I need to be like 123*10^15 . 15 needs to be in upper writing as a pow.
Thanks.
parseFloat turns a string into a number. A number has no "format"; it gets turned back into a string (by Float's method toString) when you display it. If you want to display it with a caret, you will need to format (or reformat) it yourself into a string: easiest like this:
123e45.toString().replace('e', '*10^') // result: "1.23*10^+47"
(if the + bugs you, you can try this, using a regexp:)
123e-45.toString().replace(/e\+?/, '*10^') // result: "1.23*10^47"