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Google C++ code example explanation, translating to C#


Google C++ code example explanation, translating to C#

By : Charles.Qiu
Date : November 21 2020, 04:03 PM
it fixes the issue I'm working with the Google DoubleClick ad exchange API. Their examples are in C++ and well, I'm pretty awful at C++. I'm trying to convert this to C# for something I'm working on and really, I think I just need some explanation of what is actually happening in certain blocks of this code sample. Honestly I kind of know what should happen over all but I'm not sure I am getting it 'right' and with encryption/decryption there isn't a 'sort of right'. , The equivalent C# code for that block is:
code :
using (var hmac = new HMACSHA1(encryption_key))
{
    var encryption_pad = hmac.ComputeHash(iv);
}


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Translating "plumbing" from english(explanation)

Translating "plumbing" from english(explanation)


By : user2093949
Date : March 29 2020, 07:55 AM
it should still fix some issue 'Plumbing' is a pipe system (like the one for water in your house).
It's often used in IT to mean a support infrastructure. It's a particularly suitable term in this case, since the support infrastructure is actually a transport infrastructure, kinda like pipes indeed.
C Language: Newb translating code from javascript to C, code includes malloc, strncpy, pointers

C Language: Newb translating code from javascript to C, code includes malloc, strncpy, pointers


By : dstover1688
Date : March 29 2020, 07:55 AM
With these it helps I fixed something, find it in the comments. But you need to check a C language manual...!
code :
int main()
{
   char mystring[100];
   char *stringID;
   int nep;
   // Changed to integer, not pointer to int.
   int myindicator;
   char *var1;

   nep = 0;
   printf("Please enter your CODE\n");

   /*
       This scanf is a bad idea for the same reason for which, below, we take
       care to allocate memory enough for whatever we have to do.
       Should someone input 250 characters in a buffer of size 100, those 150
       extra characters would wreak havoc and possibly endanger the system.
   */
   // scanf("%s", &mystring);
   fgets(mystring, sizeof(mystring)-1, stdin);
   // fgets will read at most "sizeof(mystring)-1", that is, 99 bytes,
   // from "stdin" (STanDard INput), the same as scanf. But it will halt
   // when reaching the limit given. It's up to us to give a "real" limit
   // (nothing stops you from saying 15000 -- even if the true value is 100).

   // C strings are made of characters, terminated by a zero byte.
   // So you need 5 here, to store 4 characters
   stringID = (char *)malloc(5 * sizeof(char));

   if (NULL == stringID)
   {
       // Serious out of memory error: no sense going on.
       // fprintf(stderr, "Out of memory\n");
       abort();
   }

   strncpy(stringID, mystring, 4);
   stringID[4] = '\0';

   printf("ID: %s\n", stringID);

   free(stringID);

   nep = nep + 4;
   printf("NEP: %d\n", nep);

   // Now we want to decode the fifth digit.

   // I use '0' as character. So if the fifth digit is '0', '0'-'0' will give 0
   // and if it is '9', '9'-'0' will give 9 (the number).
   // The trick does not work with more than one digit, of course.
   myindicator = mystring[nep] - '0';

   // Had I wanted to read 3 digits, I would have had to copy them into a 
   // temporary buffer, add a zero in the fourth position, then run atol()
   // on the resulting buffer: atol("12345\0" /* A STRING */) = 12345 /* A NUMBER */;

   printf("VLI : %d\n", myindicator);

   // Copy "myindicator" bytes, so alloc myindicator+1 chars
   var1 = (char *)malloc((myindicator + 1) * sizeof(char));

   // Check that var1 is not null and abort if it is
   if (NULL == var1)
        abort();

   strncpy(var1, mystring + 6, myindicator);
   var1[myindicator+1] = '\0';

   // Moved this printf before the free. See why below.
   printf("Prefix : %s\n", var1);

   // NEVER use a variable after you freed it!!!
   // it might APPEAR to work, but will stab you in the back the first chance it gets.
   // Good if paranoid habit: null a var as soon as you've freed it.
   free(var1); var1 = NULL;

   getchar(); 
   return 0;
}
Google Analytics Code Explanation

Google Analytics Code Explanation


By : 王宪赓
Date : March 29 2020, 07:55 AM
will help you First of all, I would pass this through a beautifier, e.g. http://jsbeautifier.org/
code :
 (function (i, s, o, g, r, a, m) {
     i['GoogleAnalyticsObject'] = r;
     i[r] = i[r] || function () {
         (i[r].q = i[r].q || []).push(arguments)
     }, i[r].l = 1 * new Date();
     a = s.createElement(o),
     m = s.getElementsByTagName(o)[0];
     a.async = 1;
     a.src = g;
     m.parentNode.insertBefore(a, m)
 })(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');

 ga('create', 'UA-xxxxxxxx-x', 'xxxxxx.com');
 ga('send', 'pageview');
(function (i, s, o, g, r, a, m) {
...
 })(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');
(function (i, s, o, g, r, a, m) {
     window['GoogleAnalyticsObject'] = 'ga';
     window['ga'] = window['ga'] || function () {
         (window['ga'].q = window['ga'].q || []).push(arguments)
     }, window['ga'].l = 1 * new Date();
     a = document.createElement('script'),
     m = document.getElementsByTagName('script')[0];
     a.async = 1;
     a.src = '//www.google-analytics.com/analytics.js';
     m.parentNode.insertBefore(a, m)
 })(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga');

 ga('create', 'UA-xxxxxxxx-x', 'xxxxxx.com');
 ga('send', 'pageview');
a = document.createElement('script'),
m = document.getElementsByTagName('script')[0];
a.async = 1;
 a.src = '//www.google-analytics.com/analytics.js';
 m.parentNode.insertBefore(a, m)
 window['ga'] = window['ga'] || function () {
     (window['ga'].q = window['ga'].q || []).push(arguments)
 }, window['ga'].l = 1 * new Date();
 ga('create', 'UA-xxxxxxxx-x', 'xxxxxx.com');
 ga('send', 'pageview');
 window['GoogleAnalyticsObject'] = 'ga';
Google tag manager code explanation

Google tag manager code explanation


By : user3487327
Date : March 29 2020, 07:55 AM
With these it helps Before I get to the explanation, I want to point out that this is minified code, that's why it's so hard to read. They did this so that they don't have to keep reusing the same values over and over again which takes up valuable bytes.
code :
window['dataLayer'] = window['dataLayer'] || []
var f = document.getElementsByTagName('script')[0]
var j = document.createElement('script')
Code is not translating german characters from Google Books API correctly

Code is not translating german characters from Google Books API correctly


By : Jeff
Date : March 29 2020, 07:55 AM
hop of those help? Easiest is to check the raw data in another way, such as a browser. Looking at a Google Books api url response in the browser is quite simple, just use the url and the response comes back as json. Optionally install a json viewer plugin, but not needed for this.
For example use this url:
code :
https://www.googleapis.com/books/v1/volumes?q=Latein+key=NO
content-type: application/json; charset=UTF-8
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