currency | 易学教程

What is the best method of handling currency/money?

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I'm working on a very basic shopping cart system. I have a table items that has a column price of type integer . I'm having trouble displaying the price value in my views for prices that include both Euros and cents. Am I missing something obvious as far as handling currency in the Rails framework is concerned? molf You'll probably want to use a DECIMAL type in your database. In your migration, do something like this: # precision is the total number of digits # scale is the number of digits to the right of the decimal point add_column :items, :price, :decimal, :precision => 8, :scale => 2 In

What is “The Best” U.S. Currency RegEx?

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问题 A quick search for currency regex brings up a lot of results. The problem I have in choosing one of these is that regex is difficult to verify without testing all the edge cases. I could spend a lot of time on this as I am sure hundreds of other developers have already done. Does anyone have a regex for U.S. Currency that has been thoroughly tested ? My only requirement is that the matched string is U.S Currency and parses to System.Decimal: [ws][sign][digits,]digits[.fractional-digits][ws]

Unformat money when parsing in PHP

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问题 Is there a way to get the float value of a string like this: 75,25 € , other than parsefloat(str_replace(\',\', \'.\', $var)) ? I want this to be dependent on the current site language, and sometimes the comma could be replaced by dot. 回答1: You can use NumberFormatter::parseCurrency - Parse a currency number Example from Manual: $formatter = new NumberFormatter('de_DE', NumberFormatter::CURRENCY); var_dump($formatter->parseCurrency("75,25 €", $curr)); gives: float(75.25) Note that the intl

Java Currency Number format

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问题 Is there a way to format a decimal as following: 100 -> \"100\" 100.1 -> \"100.10\" If it is a round number, omit the decimal part. Otherwise format with two decimal places. 回答1: I doubt it. The problem is that 100 is never 100 if it's a float, it's normally 99.9999999999 or 100.0000001 or something like that. If you do want to format it that way, you have to define an epsilon, that is, a maximum distance from an integer number, and use integer formatting if the difference is smaller, and a

Using BigDecimal to work with currencies

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问题 I was trying to make my own class for currencies using longs, but apparently I should use BigDecimal instead. Could someone help me get started? What would be the best way to use BigDecimal s for dollar currencies, like making it at least but no more than 2 decimal places for the cents, etc. The API for BigDecimal is huge, and I don\'t know which methods to use. Also, BigDecimal has better precision, but isn\'t that all lost if it passes through a double ? if I do new BigDecimal(24.99) , how

What is the best data type to use for money in C#?

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问题 What is the best data type to use for money in C#? 回答1: As it is described at decimal as: The decimal keyword indicates a 128-bit data type. Compared to floating-point types, the decimal type has more precision and a smaller range, which makes it appropriate for financial and monetary calculations. You can use a decimal as follows: decimal myMoney = 300.5m; 回答2: System.Decimal The Decimal value type represents decimal numbers ranging from positive 79,228,162,514,264,337,593,543,950,335 to

What is the best method of handling currency/money?

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问题 I\'m working on a very basic shopping cart system. I have a table items that has a column price of type integer . I\'m having trouble displaying the price value in my views for prices that include both Euros and cents. Am I missing something obvious as far as handling currency in the Rails framework is concerned? 回答1: You'll probably want to use a DECIMAL type in your database. In your migration, do something like this: # precision is the total number of digits # scale is the number of digits

Use Float or Decimal for Accounting Application Dollar Amount?

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问题 We are rewriting our legacy Accounting System in VB.NET and SQL Server. We brought in a new team of .NET/ SQL Programmers to do the rewrite. Most of the system is already completed with the Dollar amounts using Floats. The legacy system language, I programmed in, did not have a Float so I probably would have used a Decimal. What is your recommendation? Should Float or Decimal data type be used for dollar amounts? What are some of the pros and cons for either? One Con mentioned in our daily

What data type to use for money in Java? [closed]

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问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed last year . What data type should you use for money in Java? 回答1: Java has Currency class that represents the ISO 4217 currency codes. BigDecimal is the best type for representing currency decimal values. Joda Money has provided a library to represent money. 回答2: You can use Money and

Best data type to store money values in MySQL

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问题 I want to store many records in a MySQL database. All of them contains money values. But I don\'t know how many digits will be inserted for each one. Which data type do I have to use for this purpose? VARCHAR or INT (or other numeric data types)? 回答1: Since money needs an exact representation don't use data types that are only approximate like float . You can use a fixed-point numeric data type for that like decimal(15,2) 15 is the precision (total length of value including decimal places) 2