Less code, and much faster, would be:
public static string ReverseSB(string text) {
int len = text.Length;
if (len>1) {
StringBuilder sb=new StringBuilder(text);
int pivotPos=len/2;
len--;
for (int i = 0; i < pivotPos; i++) {
int j=len-i;
char temp=sb[i];
sb[i]=sb[j];
sb[j]=temp;
}
text=sb.ToString();
}
return text;
}
or its extension-method variant. Tested on a 80-char string
, it is 8 times faster. The reason should be clear: John's code creates 6 string
s for each character pair, as each SubString
, Remove
, Insert
method generates a new string
object, copying the relevant characters.
:)
I am an engineer with a background in electronics, software and mathematics.
I develop technical software, both for embedded systems and for desktop equipment. This includes operating systems, communication software, local networks, image processing, machine control, automation, etc.
I have been using all kinds of microcontrollers and microprocessors (Intel 4004/8080/8051/80386/Pentium, Motorola 680x/680x0/ColdFire/PowerPC, Microchip PIC, Altera NIOS, and many more), lots of programming languages (all relevant assemblers, Fortran, Basic, C, Java, C#, and many more), and different operating systems (both proprietary and commercial).
For desktop applications and general development tools I have been using both UNIX systems and Mac/MacOS for many years, but I have switched to x86-based PCs with Windows, Visual Studio and the .NET Framework several years ago.
I specialize in:
- cross-platform development (making software that runs on diverse hardware/OS combinations)
- instruction set simulation
- improving software performance, i.e. making sure the software runs the job at hand in as short a time as possible on the given hardware. This entails algorithm selection, implementation design, accurate measurements, code optimisation, and sometimes implementing virtual machines, applying SIMD technology (such as MMX/SSE), and more.