Variable expansion means replace a variable enclosed in % or ! by its value. The %normal% expansion happen just once, before a line is executed. This means that a %variable% expansion have the same value no matters if the line is executed several times (like in a for command). The !delayed! expansion is performed each … Read more
One Option: Setting a dynamic variable name: <cfset variables[“GC” & AID] = “Testing” /> Output the value of the dynamic variable name: <cfoutput>#variables[“GC” & AID]#</cfoutput> Another Option: Setting a dynamic variable name: <cfset variables[“GC#AID#”] = “Testing” /> Output the value of the dynamic variable name: <cfoutput>#variables[“GC#AID#”]#</cfoutput>
It comes ultimately from mathematics: the summation notation traditionally uses i for the first index, j for the second, and so on. Example (from http://en.wikipedia.org/wiki/Summation): It’s also used that way for collections of things, like if you have a bunch of variables x1, x2, … xn, then an arbitrary one will be known as xi. … Read more
You don’t. This is a language feature to prevent the standard unwanted side-effect of assignment returning a value, as described in the Swift book: Unlike the assignment operator in C and Objective-C, the assignment operator in Swift does not itself return a value. The following statement is not valid: if x = y { // … Read more
The best approach I think is to compare ULPs. bool is_nan(float f) { return (*reinterpret_cast<unsigned __int32*>(&f) & 0x7f800000) == 0x7f800000 && (*reinterpret_cast<unsigned __int32*>(&f) & 0x007fffff) != 0; } bool is_finite(float f) { return (*reinterpret_cast<unsigned __int32*>(&f) & 0x7f800000) != 0x7f800000; } // if this symbol is defined, NaNs are never equal to anything (as is normal … Read more
They’re doubles. vpa() is simply choosing to display non-significant digits beyond the floating point relative accuracy, where printf() and disp() truncate or zero them out. You’re only getting your original four digits back out because the literal you chose to initialize num with just happens to be the exact decimal expansion of a binary double … Read more
The Variable declarations make it clear that variables are declared. The var keyword is required, it is short and expresses what is done (at the file level everything excluding comments has to start with a keyword, e.g. package, import, const, type, var, func). Like any other block, variable declarations can be grouped like this: var … Read more
I fear that you will not be able to do this. Fortran requires that variables have names and types at compile time. You (or other SOers) may come up with some kludge to simulate what you want, but it will be a kludge. Why do you want to do this in Fortran ? There are … Read more
The problem is the spaces around the equal sign. This should do what you want. set TESTVAR=”No Value” ECHO var = %TESTVAR% set TESTVAR=”” ECHO var = %TESTVAR% set TESTVAR=”New value” ECHO var = %TESTVAR%
This is probably close to what you want: set palette model RGB defined ( 0 ‘red’, 1 ‘green’ ) plot[0:5][0:6] “file.dat” u 1:2:( $3 == 0 ? 0 : 1 ) with points palette You could go one step further and remove the “noise”: unset key unset colorbox plot[0:5][0:6] “file.dat” u 1:2:( $3 == 0 … Read more