There’s no mystery here, the linker is telling you that you haven’t defined the missing symbols, and you haven’t. Similarity::Similarity() or Similarity::~Similarity() are just missing and you have defined the others incorrectly, void Similarity::readData(Scanner& inStream){ } not void readData(Scanner& inStream){ } etc. etc. The second one is a function called readData, only the first is … Read more
Some methods take a block, and this pattern frequently appears for a block: {|x| x.foo} and people would like to write that in a more concise way. In order to do that they use a combination of: a symbol, the method Symbol#to_proc, implicit class casting, and & operator. If you put & in front of … Read more
Do symbols really fit into Scala? In the wonderful land of Lisp, code is represented as nested lists of literal objects that denote themselves (strings, numbers, and so on), and symbols, which are used as identifiers for things like classes, functions, and variables. As Lisp code has a very simple structure, Lisp allows the programmer … Read more
Just think of the Emoji block of Unicode. Perhaps the man 👨 at U+1F468 or the woman đź‘© at U+1F469 will suffice, but there are also children, older people, etc. Here’s a list of Emoji People. It still depends on your actual use-case. If other exotics are no issue, take a look at Egyptian Hieroglyphs. … Read more
I had this issue on the latest Xcode 4. Cause: I included file.m instead of file.h Possibly, you included TinCanViewController.m (should be TinCanViewController.h)
Consider the following: Symbol table .symtab contains 1203 entries: Num: Value Size Type Bind Vis Ndx Name 310: a0008120 0 NOTYPE GLOBAL DEFAULT ABS _gp 734: a0000010 32 OBJECT GLOBAL DEFAULT 77 v 818: 9d000018 496 FUNC GLOBAL DEFAULT 71 main 849: a0000124 4 OBJECT GLOBAL DEFAULT 78 phrase 955: a0000000 9 OBJECT GLOBAL DEFAULT … Read more
to_sym converts a string to a symbol. For example, “a”.to_sym becomes :a. It’s not specific to Rails; vanilla Ruby has it as well. It looks like in some versions of Ruby, a symbol could be converted to and from a Fixnum as well. But irb from Ruby 1.9.2-p0, from ruby-lang.org, doesn’t allow that unless you … Read more
They normally prefix temporary tables. From the docs…. Prefix local temporary table names with single number sign (#table_name), and prefix global temporary table names with a double number sign (##table_name).
It symbolizes ‘symbol derivation rule’ in Backus–Naur Form Meaning that in: <symbol> ::= __expression__ nonterminal <symbol> consists of (is defined as, is constructed from, derives from) __expression__ It’s used to describe language grammars. Notice that both examples are in Extended Backus–Naur Form, but using a traditional BNF symbol-expression separator (::=).
Using Macports: Install macports. Using macports port install binutils gobjdump -p /path/to/app Using Homebrew: Install Homebrew Do brew update && brew install binutils /usr/local/path/to/gobjdump -p /path/to/app # or follow instructions to add it to your PATH There are, of course, many other command-line options. Note that the binutils port cautions that installing it may cause … Read more