string-formatting

问题 When I code and run the statement: print "\x00\x00\x00" in Python it outputs three blank spaces followed by a newline. But in C, when I code and run the statement: char hex[] = "\x00\x00\x00"; printf("%s\n", hex); it interprets the NULL bytes like I thought it would: it doesn't do anything. So why in Python are NULL bytes treated as spaces?... 回答1: So why in Python are NULL bytes treated as spaces? It's not. Your terminal/console is treating them like spaces. C just happens to stop at the

问题 I'm trying to convert big number to hexadecimal representation in R, but it fails, because it can't fit into 32-bit integer. Is there any way to overcome this limitation? > print(0xffffffff+0x10000000) [1] 4563402751 > as.hexmode(0xffffffff+0x10000000) Error in if (is.double(x) && (x == as.integer(x))) x <- as.integer(x) : missing value where TRUE/FALSE needed In addition: Warning message: In as.hexmode(4294967295 + 268435456) : NAs introduced by coercion 回答1: Luckily I found the solution,

问题 I have a list of things I'd like to print using a format string. In Python 3-style, using "a string".format(arg,arg,arg) , this is easy. I can just replace with arguments with *mylist , like mylist = [1,2,3] "{} {} {}".format(*mylist) I can't seem to make this work with the older percent-formatting. I've tried stuff like "%i %i %i" % mylist , %i %i %i" % (mylist) , and %i %i %i" % (*mylist) but I just keep getting syntax errors or "not enough arguments". Is this impossible in 2.x style? ETA:

问题 There is String.Format function that is referred to in the documentation as the analog for Format function from VB6. There's also Format function from VisualBasic namespace that is provided for compatibility and basically has same powers as String.Format . Indeed, those two format dates and numbers. But VB6's function was also able to format strings: ? format$("hi there", ">") HI THERE ? format$("hI tHeRe", "<") hi there ? format$("hi there", ">!@@@... not @@@@@") HI ... not THERE String

问题 There is String.Format function that is referred to in the documentation as the analog for Format function from VB6. There's also Format function from VisualBasic namespace that is provided for compatibility and basically has same powers as String.Format . Indeed, those two format dates and numbers. But VB6's function was also able to format strings: ? format$("hi there", ">") HI THERE ? format$("hI tHeRe", "<") hi there ? format$("hi there", ">!@@@... not @@@@@") HI ... not THERE String

问题 This question already has answers here : Custom numeric format string to always display the sign (6 answers) Closed 5 years ago . I want to format any number (integer or real) to a string representation which always has a sign (positive or negative) and a decimal separator , but no trailing zeroes. Some samples: 3.14 => +3.14 12.00 => +12. -78.4 => -78.4 -3.00 => -3. Is it possible with one of the default ToString() implementations, or do I need write this myself? 回答1: Try something like this

问题 I Have built a string using a formula in excel. as an example Cell C3 contains text "Languages" Cell C4 = "English, Spanish,German, French" My Forumla = C3 & ":" & CHAR(10) & C4 The Desired text would be: Languages: English, Spanish, German, French (where the bold text would actually be some color like red) Is there a way to do this in Excel (change partial text formatting) . I Have tried a formula... (Not working) Function formatText(InText As Range) 'Set font color InText.Characters(1.5)

问题 I have a piece of code as below: tupvalue = [('html', 96), ('css', 115), ('map', 82)] So while printing the above tuple in the desired format for a particular index I found a code like this: >>> '%s:%d' % tupvalue[0] 'html:96' I'm wondering how the single value tupvalue[0] is recognised as a tuple of two values by the format specifier '%s:%d' ? Please explain this mechanism with a documentation reference. How can I use a comprehension to format all the values in tupvalue in the required

问题 This code works fine in Java 1.6: public static String padLeft(String s, int n) { if (n <= 0) return s; int noOfSpaces = n * 2; String output; noOfSpaces = s.length() + noOfSpaces; output = String.format("%1$#" + noOfSpaces + "s", s); return output; } But newer versions (and some other VM implementations) throw this Exception : java.util.FormatFlagsConversionMismatchException: Mismatched Convertor =s, Flags= # at java.util.Formatter$Transformer.transformFromString(Formatter.java:1020) at java

问题 We have a number in XML that can go up to 3 digits in a large XML file that has to be converted to fixed length text for loading into another system. I need to pad this with leading zeros to a length of 15 in the output (which is fixed length text) Examples: - 1 becomes 000000000000001 - 11 becomes 000000000000011 - 250 becomes 000000000000250 I tried this: <xsl:value-of select="substring(concat('000000000000000', msg:BankAccount/msg:Counter), 12, 15)"/> to get the 15 zeros at the beginning