string-formatting

I need to format a decimal value to a string where i always display at lease 2 decimals and at most 4. so for example "34.49596" would be "34.4959" "49.3" would be "49.30" can this be done using the String.format command? Or is there an easier/better way to do this in java. You want java.text.DecimalFormat. DecimalFormat df = new DecimalFormat("0.00##"); String result = df.format(34.4959); Yes you can do it with String.format : String result = String.format("%.2f", 10.0 / 3.0); // result: "3.33" result = String.format("%.3f", 2.5); // result: "2.500" Here is a small code snippet that does the

This question already has an answer here: what's the meaning of %r in python 7 answers On Learn Python the Hard Way page 21, I see this code example: x = "There are %d types of people." % 10 ... print "I said: %r." % x Why is %r used here instead of %s ? When would you use %r , and when would you use %s ? Ben James The %s specifier converts the object using str() , and %r converts it using repr() . For some objects such as integers, they yield the same result, but repr() is special in that (for types where this is possible) it conventionally returns a result that is valid Python syntax, which

The java.util.Date toString() method displays the date in the local time zone. There are several common scenarios where we want the data to be printed in UTC , including logs, data export and communication with external programs. What's the best way to create a String representation of java.util.Date in UTC? How to replace the j.u.Date’s toString() format, which isn't sortable (thanks, @JonSkeet!) with a better format? Addendum I think that the standard way of printing the date in a custom format and time zone is quite tedious: final Date date = new Date(); final String ISO_FORMAT = "yyyy-MM

I have a function to add commas to numbers: function commafy( num ) { num.toString().replace( /\B(?=(?:\d{3})+)$/g, "," ); } Unfortunately, it doesn't like decimals very well. Given the following usage examples, what is the best way to extend my function? commafy( "123" ) // "123" commafy( "1234" ) // "1234" // Don't add commas until 5 integer digits commafy( "12345" ) // "12,345" commafy( "1234567" ) // "1,234,567" commafy( "12345.2" ) // "12,345.2" commafy( "12345.6789" ) // "12,345.6789" // Again, nothing until 5 commafy( ".123456" ) // ".123 456" // Group with spaces (no leading digit)

I just want fixed width columns of text but the strings are all padded right, instead of left!!? sys.stdout.write("%6s %50s %25s\n" % (code, name, industry)) produces BGA BEGA CHEESE LIMITED Food Beverage & Tobacco BHP BHP BILLITON LIMITED Materials BGL BIGAIR GROUP LIMITED Telecommunication Services BGG BLACKGOLD INTERNATIONAL HOLDINGS LIMITED Energy but we want BGA BEGA CHEESE LIMITED Food Beverage & Tobacco BHP BHP BILLITON LIMITED Materials BGL BIGAIR GROUP LIMITED Telecommunication Services BGG BLACKGOLD INTERNATIONAL HOLDINGS LIMITED Energy You can prefix the size requirement with - to