currency | 易学教程

Yahoo Finance All Currencies quote API Documentation

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问题 I've being using this feed for a long time, I believe Apple does it as well in one of the mac widgets. but what is really curious is that I simply can't find any documentation for it, I've tried google and everything. http://finance.yahoo.com/webservice/v1/symbols/allcurrencies/quote I can see people using different parameters like view=basic date=Ymd; currency=true but it's horrible there isn't anything official. For now I am using these parameters: format=json and callback=list sometimes...

How to properly format currency on ios

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问题 I'm looking for a way to format a string into currency without using the TextField hack. For example, i'd like to have the number "521242" converted into "5,212.42" Or if I have a number under 1$, I would like it to look like this: "52" -> "0.52" Thanks 回答1: You probably want something like this (assuming currency is a float): NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; [numberFormatter setNumberStyle: NSNumberFormatterCurrencyStyle]; NSString *numberAsString =

How to format a Double into Currency - Swift 3

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问题 I'm new to Swift programming and I've been creating a simple tip calculator app in Xcode 8.2, I have my calculations set up within my IBAction below. But when I actually run my app and input an amount to calculate (such as 23.45), it comes up with more than 2 decimal places. How do I format it to .currency in this case? @IBAction func calculateButtonTapped(_ sender: Any) { var tipPercentage: Double { if tipAmountSegmentedControl.selectedSegmentIndex == 0 { return 0.05 } else if

Print Currency Number Format in PHP

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问题 I have some price values to display in my page. I am writing a function which takes the float price and returns the formatted currency val with currency code too.. For example, fnPrice(1001.01) should print $ 1,000.01 回答1: The easiest answer is number_format(). echo "$ ".number_format($value, 2); If you want your application to be able to work with multiple currencies and locale-aware formatting ( 1.000,00 for some of us Europeans for example), it becomes a bit more complex. There is money

Need API for currency converting [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . Please advice API for currency converting which returns JSON or small size html. I use http://www.google.com/finance/converter?a=1&from=RUB&to=USD that returns HTML of 11 kb. I use it in my iOS app. Thanks in advance! 回答1: free.currencyconverterapi.com returns results in JSON format. The web service also

What to do with Java BigDecimal performance?

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问题 I write currency trading applications for living, so I have to work with monetary values (it\'s a shame that Java still doesn\'t have decimal float type and has nothing to support arbitrary-precision monetary calculations). \"Use BigDecimal!\" — you might say. I do. But now I have some code where performance is an issue, and BigDecimal is more than 1000 times (!) slower than double primitives. The calculations are very simple: what the system does is calculating a = (1/b) * c many many times

HTML text input field with currency symbol

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I would like to have a text input field containing the "$" sign in the very beginning, and no matter what editing occurs to the field, for the sign to be persistent. I would be good if only numbers were accepted for input, but that's just a fancy addition. BalusC Consider simulating an input field with a fixed prefix or suffix using a span with a border around a borderless input field. Here's a basic kickoff example: .currencyinput { border: 1px inset #ccc; } .currencyinput input { border: 0; } <span class="currencyinput">$<input type="text" name="currency"></span> Use a parent .input-icon div

iPhone: How to get local currency symbol (i.e. “$” instead of “AU$”)

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问题 Here\'s a code of how I get currency symbol now: NSLocale *lcl = [[[NSLocale alloc] initWithLocaleIdentifier:@\"au_AU\"] autorelease]; NSNumberFormatter *fmtr = [[[NSNumberFormatter alloc] init] autorelease]; [fmtr setNumberStyle:NSNumberFormatterCurrencyStyle]; [fmtr setLocale:lcl]; NSLog( @\"%@\", [lcl displayNameForKey:NSLocaleCurrencySymbol value:@\"AUD\"] ); NSLog( @\"%@\", [fmtr currencySymbol] ); Both NSLogs return \"AU$\". As I understood from Apple development documentation, there

storing money amounts in mysql

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问题 I want to store 3.50 into a mysql table. I have a float that I store it in, but it stores as 3.5, not 3.50. How can I get it to have the trailing zero? 回答1: Do not store money values as float, use the DECIMAL or NUMERIC type: Documentation for MySQL Numeric Types EDIT & clarification: Float values are vulnerable to rounding errors are they have limited precision so unless you do not care that you only get 9.99 instead of 10.00 you should use DECIMAL/NUMERIC as they are fixed point numbers

Best way to store currency values in C++

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I know that a float isn't appropriate to store currency values because of rounding errors. Is there a standard way to represent money in C++? I've looked in the boost library and found nothing about it. In java, it seems that BigInteger is the way but I couldn't find an equivalent in C++. I could write my own money class, but prefer not to do so if there is something tested. Don't store it just as cents, since you'll accumulate errors when multiplying for taxes and interest pretty quickly. At the very least, keep an extra two significant digits: $12.45 would be stored as 124,500. If you keep