subscript

问题 I'm writing a slug generator for making nice urls. I'd like to convert m² to m2, but in a generic way that does this for all superscript (or subscript), not just a simple replace statement. Any ideas? 回答1: Thanks Johannes, you set me on the right track. The code with which I got it to work looks as follows: public string ConvertSuperscript(string value) { string stringFormKd = value.Normalize(NormalizationForm.FormKD); StringBuilder stringBuilder = new StringBuilder(); foreach (char character

问题 Let's say I have a vector class: typedef struct vec3_s { float x, y, z; } vec3; But, I would like to be able to iterate through it without converting it to an array of floats. While a cast is acceptable in this case, I'm curious to see if anything along the lines of C++ like functionality is doable in straight C. For example, in C++, since std::vector< T > has the subscript [] operator overloaded, I can pass the address of its first index to a function taking a void* . i.e., void do_something

问题 I am using the subscript in the following code incorrectly for this Firebase data pull, but I can't figure out what I am doing wrong. I get an error of Ambiguous use of subscript for the let uniqueID = each.value["Unique ID Event Number"] as! Int line. // Log user in if let user = FIRAuth.auth()?.currentUser { let uid = user.uid // values for vars sevenDaysAgo and oneDayAgo set here ... let historyRef = self.ref.child("historyForFeedbackLoop/\(uid)") historyRef.queryOrdered(byChild: "Unix

问题 How can I write subscript characters in a Java string? For example, I have to write "CO2" . How can I move 2 to the bottom of CO ? 回答1: The String class doesn't provide such operations. But you could use the Unicode Character 'SUBSCRIPT TWO' (U+2082): final String string = "CO\u2082"; // CO₂ Also, you could create a String as an HTML snippet. For instance, final String html = "CO₂"; 来源： https://stackoverflow.com/questions/31414960/how-to-use-subscript-in-java-string

问题 I believe it has something to do with optionals, but I'm safely unwrapping sourceURL so I'm still not sure where the error is! I'm trying to access a JSON object's array's dictionary value. However, I'm still getting the "could not find overload for 'subscript' that accepts the supplied arguments. It seems simple, but I just can't seem to figure it out! var dictTemp: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error:

问题 I would like to add the title, " Emissions from PM2.5 in the United States from 1999 to 2008" which uses the base plotting function in r. In that, I would like 2.5 to be a subscript to PM. I don't have any problem doing that if PM2.5 happens to be at the end of the string: barplot(height = total.emissions$Emissions, names.arg=total.emissions$year, xlab="Year", ylab= " Amount of emitted in tonsPM"2.5 , main = "Emissions from in the United States from 1999 to 2008PM"[2.5] ) But I can't do the

问题 I am trying to display CO2 in a static text control on a .NET application, but on some Windows XP system, the subscript-2 (unicode 2082) appears as a square). I suspect that it may be a font issue as it appears on some Windows XP systems but not on all. It always displays on Windows 7 and Vista. It's available on MS Gothic font. Ideas very welcome. 回答1: MS Sans Serif doesn't contain Unicode character U+2082, therefore the glyph will only be rendered as a square. To solve the problem you need

问题 With matplotlib 2.0 I have been having strange behavior when I use both subscript and superscript on the same character. When they are combined, the subscript goes down entirely below the baseline. This didn't happen with MPL 1.5. Here is a complete example: import matplotlib as mpl import matplotlib.pyplot as plt mpl.rc("font", family="Times New Roman",weight='normal') plt.rcParams.update({'mathtext.default': 'regular' }) plt.plot(1,1, label='$A_x^{b}$') plt.plot(2,2,label='$A_x$') plt.plot

问题 The C++ standard defines the expression using subscripts as a postfix expression. AFAIK, this operator always takes two arguments (the first is the pointer to T and the other is the enum or integral type). Hence it should qualify as a binary operator. However MSDN and IBM does not list it as a binary operator. So the question is, what is subscript operator? Is it unary or binary? For sure, it is not unary as it is not mentioned in $5.3 (at least straigt away). What does it mean when the

问题 I have been able to successfully subscript numbers in my app by doing: static const unichar kSubscriptZero = 0x2080; int numberOfHydrogens = 2; NSString *header1 = [NSString stringWithFormat:@"H%CO", kSubscriptZero + numberOfHydrogens]; The problem is this: I tried doing the same things with other characters that can be found in unicode characters but it did not work, all I got was a square box instead of my character, turns out that means that there is no glyph in my font for that character.