Where does the __1 symbol come from when using LLVM’s libc++?
It is from C++11 inlined namespaces libc++ has something like namespace std { inline namespace __1 { …. more at What are inline namespaces for?
symbols
Meaning of *& and **& in C++
That is taking the parameter by reference. So in the first case you are taking a pointer parameter by reference so whatever modification you do to the value of the pointer is reflected outside the function. Second is the simlilar to first one with the only difference being that it is a double pointer. See … Read more
Meaning of the various symbols in .aspx page of asp.net
It is just syntax. <% %> is simply short for <script runat=”server”> </script> aka code render blocks. <%# %> are binding expressions (plus the above). <%= %> is the above + a Response.Write(). <%: %> is the above + a Response.Write() wrapped in Html.Encode (new in .NET 4.0). <%$ %> is an ASP.NET expression, used … Read more
Using Sympy Equations for Plotting
You can use numpy.linspace() to create the values of the x axis (x_vals in the code below) and lambdify(). from sympy import symbols from numpy import linspace from sympy import lambdify import matplotlib.pyplot as mpl t = symbols(‘t’) x = 0.05*t + 0.2/((t – 5)**2 + 2) lam_x = lambdify(t, x, modules=[‘numpy’]) x_vals = linspace(0, … Read more
How to insert a Symbol (Pound, Euro, Copyright) into a Textbox
In C#, the Unicode character literal \uXXXX where the X‘s are hex characters will let you specify Unicode characters. For example: \u00A3 is the Pound sign, £. \u20AC is the Euro sign, €. \u00A9 is the copyright symbol, ©. You can use these Unicode character literals just like any other character in a string. For … Read more
What is ‘global symbol registry’?
var sym = Symbol(); is creating a new property sym in dictionary(window), which is in global scope, where value can be accessed as window[‘sym’]. Well, no. It does create a symbol and assigns it to a local variable named sym. Only if you are executing this code in the global scope (which you usually wouldn’t, … Read more
What does the SQL # symbol mean and how is it used?
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).
kernel symbol marked with “T” in /proc/kallsyms is not exported
Mark “T” in /proc/kallsyms means that symbol is globally visible, and can be used in other kernel’s code (e.g. by drivers, compiled built-in). But for being usable in kernel module’s code, symbol is needed to be exported using EXPORT_SYMBOL or similar. List of exported symbols is maintained separately from list of all symbols in the … Read more
Using Ruby Symbols
In short, symbols are lightweight strings, but they also are immutable and non-garbage-collectable. You should not use them as immutable strings in your data processing tasks (remember, once symbol is created, it can’t be destroyed). You typically use symbols for naming things. # typical use cases # access hash value user = User.find(params[:id]) # name … Read more