problem about data-conversion-Collection of common programming errors

12 years ago
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3 minutes

  • Gerald Trost
    c# encoding utf-8 binary data-conversion
    In c# I can encode binary data by Encoding.UTF8.GetString() and later convert it back by binary = Encoding.UTF8.GetBytes().I expect that the result should be my original binary data in any case – no exception.But is it true in any case?Or does it depend on the specific behaviour of the UTF8 character set?Or should I better use Encoding.ASCII.GetString() and Encoding.ASCII.GetBytes()?If anybody knows what Encoding exactly does (how it treats special characters or special bytes) then, please, giv

  • Michal Kulinski
    sql orm data-conversion object-relational-model application-framework
    Assume that I have existing database with existing data.Is there any framework / ORM that generates data conversion SQL scripts when I need change column datatype? Of course there is problem with conversions like float to int string to int, but I would like to have such default functionality that automatically converts data fromint to float int to string.Do I have always to write data SQL data conversion scripts in both cases?

  • schnaader
    c++ audio data-conversion
    For my MFC application, I need to convert .wav data in an array into ogg vorbis format.I compiled both libogg and libvorbis as static libraries. I created “bin” directory in my project folder and placed there libvorbis_static.lib and libvorbisfile_static.lib. Also, I created in the bin directory libvorbis folder, and an include folder in it, and placed there vorbis (with codec.h, vorbisfile.h, vorbisenc.h) and ogg (with os_types.h and ogg.h) folders. I added libvorbis_static.lib to additional de

  • infensus
    javascript arrays object data-conversion
    JSFiddle: http://jsfiddle.net/3WdzL/1/I need to convert locale JS object files to flattened versions and back again:Orig locale object:var localeObj = {toolbar: {link: {back: ‘Back’,menu: ‘Menu’,},flatTest: ‘something’},countries: [[“AF”, “Afghanistan”],[“AX”, “Åland Islands”],[‘nested’, [1, 2, 3, 4]],[“AL”, “Albania”]] };Using the following function:function flattenObj(obj) {var flattenedObj = {};var walk = function(obj, stringMap) {for(k in obj) {var computedKey = stringMap + (stringMap ? ‘.’

  • Tom
    c++ ieee-754 data-conversion
    I have a unsigned long integer value which represents a float using IEEE-754 format. What is the quickest way of printing it out as a float in C++?I know one way, but am wondering if there is a convenient utility in C++ that would be better.Example of the way that I know is:union {unsigned long ul;float f; } u;u.ul = 1084227584; // in HEX, this is 0x40A00000cout << “float value is: ” << u.f << endl;(This prints out “float value is: 5” )

  • MPelletier
    c++ class object data-conversion
    I have run into this situation I find really tricky. I have 2 classes: time12 and time24 which maintain time on a 12 hr and 24 hr basis respectively. Both of them are supposed to have individual conversion functions to handle conversions to the other type. But if I declare time 12 first, then the “time24” in the prototype of the conversion function will be undefined as the time24 class will be declared later. So what do I do now? I can’t even only declare it inside and define it after the 2nd cl

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