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Questions tagged [symbols]

can refer to a letter or special character; a primitive data type in many programming languages; an item of the alphabet of a formal language.

Symbol can refer to:

  • A letter or special character, e.g. '@'. Questions about character processing or dealing with specific characters can be tagged with this tag.
  • A primitive data type in many programming languages (Lisp, Prolog, Ruby, Smalltalk etc.)
  • An item of the alphabet of a formal language.
3495 questions
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How to get an outline view in sublime texteditor?

How do I get an outline view in sublime text editor for Windows? The minimap is helpful but I miss a traditional outline (a klickable list of all the functions in my code in the order they appear for quick navigation and orientation) Maybe there is…
user89021
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How to check if program was compiled with debug symbols?

I'd like to trace some code in GIMP and therefore need GIMP with debug symbols enabled. I don't remember whether I have enabled them during compilation. How to check that without recompiling the program?
Lukasz Czerwinski
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12 answers

HTML for the Pause symbol in audio and video control

I'm trying to find the Unicode symbol to make a button display the Unicode pause symbol. I was able to find that the Unicode play symbol is ► but I'm looking for the equivalent of the Unicode pause symbol.
user3081307
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Displaying the Indian currency symbol on a website

This symbol for the rupee, the currency of India, was approved by the Union Cabinet on 15 July 2010. How can I display it on a website?
JustLearn
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4 answers

What is the difference between "gcc -s" and a "strip" command?

I wonder what is the difference between these two: gcc -s: Remove all symbol table and relocation information from the executable. strip: Discard symbols from object files. Do they have the same meaning? Which one do you use to: reduce the…
Tim
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4 answers

When to use symbols instead of strings in Ruby?

If there are at least two instances of the same string in my script, should I instead use a symbol?
Alan Coromano
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104
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5 answers

Unfamiliar symbol in algorithm: what does ∀ mean?

I'm reading about an algorithm (it's a path-finding algorithm based on A*), and it contains a mathematical symbol I'm unfamiliar with: ∀ Here is the context: v(s) ≥ g(s) = mins'∈pred(s)(v(s') + c(s', s)) ∀s ≠ sstart Can someone explain the meaning…
devuxer
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3 answers

How to deal with symbol collisions between statically linked libraries?

One of the most important rules and best practices when writing a library, is putting all symbols of the library into a library specific namespace. C++ makes this easy, due to the namespace keyword. In C the usual approach is to prefix the…
datenwolf
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8 answers

Meaning of *& and **& in C++

I found these symbols in a function declaration several times, but I don't know what they mean. Example: void raccogli_dati(double **& V, double **p, int N) { int ultimo = 3; V = new double * [N/2]; for(int i=0; i < N/2; i++) { V[i] =…
sdffadsf
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Best way to encode Degree Celsius symbol into web page?

How should I encode special characters into web pages? For instance I need this symbol ℃, which I used just by copying and pasting the character as I can see it now. This worked for the desktop browsers I checked with and also on iPad and iPhone but…
Evanss
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6 answers

Regex to remove letters, symbols except numbers

How can you remove letters, symbols such as ∞§¶•ªºº«≥≤÷ but leaving plain numbers 0-9, I want to be able to not allow letters or certain symbols in an input field but to leave numbers only. Demo. If you put any symbols like ¡ € # ¢ ∞ § ¶ • ª or…
MacMac
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2 answers

Convert Symbol to a String in Elisp

How can I convert a symbol type into a string in Emacs lisp? I wasn't able to find a symbol-to-string function or anything similar.
Cristian
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How to understand symbols in Ruby

Despite reading "Understanding Ruby Symbols", I'm still confused by the representation of the data in memory when it comes to using symbols. If a symbol, two of them contained in different objects, exist in the same memory location, then how is it…
Kieran Senior
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in java what does the @ symbol mean?

I know what it means in a comment for documentation purposes, but outside of that what does it mean? (I would normally just google this but every non letter symbol shows up in results)
ViceVersa666444
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Is there a Python equivalent to Ruby symbols?

Is there a Python equivalent to Ruby symbols? If so then what is it? If not then are we stuck with using strings as our keys in dictionaries only?
pylonicon
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