How to store a set of long character strings to find a long character string key

I have a set of several thousand strings of maximum length 1024 (containing all visible ASCII characters plus space) that I need to store to make it quicker to find an exact match for a key. What is the best algorithm for storing the set and looking for a match?

email: how do you extract specific strings from an attachment in a SharePoint list?

I want to extract certain parts of the email content and put the results in the list item fields.

I want to add this to a flow that I have already created that:

  1. Forward an email from a shared mailbox to a SharePoint
  2. Then a list item is created in that list
  3. The body of the email is converted from HTML to text.
  4. The result of that conversion enters a list item field
  5. The field content of that list item is used to create a text file and is attached to the list item.

For example, a string I'm interested in extracting:

  • will always be a line
  • will always be the last line
  • start with "Ref:"
  • I want to put that line in a text field in my list item

Is there a way to do this?

Combinatorial problem in non-collinear strings in the $ n times n $ box

exist $ n times n $ points. How many strings exist at its vertices, where there are not three collinear points and each point is used at most once.
I have drawn examples below (red is fine but green is not).

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C # How to remove characters, numbers and blanks from an array of strings?

Remove characters, numbers, and blanks from
current string [] = "a] 773 b"; "e] 1597 t"; "z] 0 c"
so that the result is string [] result = "a, b"; "e, t"; "z, c"?
note: deleted items must be replaced with ",".

strings – Uppercase and lowercase function in C

I have written the following function in C, which will take as input a character array (decayed to a char *, of course), and will mutate the string into an uppercase string in the title in the form "this is a string" -> "This is a chain."

void title_case(char str())
    size_t i;
    str(0) = toupper((int) str(0));
    if(strlen(str) == 1) return;
    for(i = 1; i < strlen(str); ++i)
        str(i) = tolower((int)str(i));
        if(str(i -1) == ' ')
            str(i) = toupper((int)str(i));

Please provide any comments you consider appropriate. Is there a more concise way to do this? Is the notation in parentheses the clearest form?



void title_case(char str());
int main(void)
    char sentence() = "this is a SeNTeNce.";
    printf("%sn", sentence);
    return 0;

How to compare two strings?

In python, you can do this:


returns False.

In Mathematica, it doesn't evaluate.

But why? These are literal strings, not symbols.

C program that compares software version strings

Instead of spelling out each element of the array,

char ver_string() = {'5','.','2','5','.','5','.','0',''};

just use a string literal. Is the same:

char ver_string() = "";

Instead of using assert in its functions just trust the user to pass a non-null pointer.

Should I print to stderr only in the (main) controller program and leave all of that out of the main "library" code?

Yes, exactly. You can return error codes and configure errno to be more specific.

Second, I have a enum definition for FAIL but I never actually use it because when I wrote the change clause I thought it might be a better idea to just default the error instead of explicitly selecting it.

It's okay. Anything other than a valid entry is an invalid entry.

Does not return a value of version_parse although it looks like he even inserted a new line where he was supposed to go.

Instead of using LEFT Y RIGHT, I would use GREATER Y LESS. Those names convey more meaning to me.

Functions that don't take values ​​usually have an unnamed name void parameter. I suggest doing that with main, because it could be undefined behavior if not:

int main(void)

(I also fixed the format to make it more consistent.)

All these (unsigned int) molds are not necessary:

pVer->major = (unsigned int) atoi(token);
token = strtok(NULL, delim);
pVer->minor = (unsigned int) atoi(token);
token = strtok(NULL, delim);
pVer->build = (unsigned int) atoi(token);
token = strtok(NULL, delim);
pVer->revision = (unsigned int) atoi(token);

In validate_version_string, tmp Y copy are unnecessary just use str Y *str, like:

for(; *str != ''; ++str)
    if(*str == '.') ++count;
    if((*str > '9' || *str < '0') && *str != '.') return false;

You may think that delete tmp it's bad for performance, but it's not; at any non-zero optimization level, these are equivalent.

The main thing I would like to say is:

Don't reinvent the wheel.

if you have strverscmp available (GNU libc and others), and your code doesn't have to be portable, why not use it? – Conversion of strings to type "long" is invalid

In a program I'm doing, a user-determined directory is needed to export a .bat.

 System.InvalidCastException: A conversão da cadeia de caracteres 'C:UsersDesktop' no tipo 'Long' não é válida. ---> System.FormatException: A cadeia de caracteres de entrada não estava em um formato correto.
   em Microsoft.VisualBasic.CompilerServices.Conversions.ParseDecimal(String Value, NumberFormatInfo NumberFormat)
   em Microsoft.VisualBasic.CompilerServices.Conversions.ToLong(String Value)
   --- Fim do rastreamento de pilha de exceções internas ---
   em Microsoft.VisualBasic.CompilerServices.Conversions.ToLong(String Value)
   em FASTT.Form2.Form2_Load(Object sender, EventArgs e) na C:UserssourcereposFASTTFASTTForm2.vb:linha 230
   em System.Windows.Forms.Form.OnLoad(EventArgs e)
   em System.Windows.Forms.Form.OnCreateControl()
   em System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   em System.Windows.Forms.Control.CreateControl()
   em System.Windows.Forms.Control.WmShowWindow(Message& m)
   em System.Windows.Forms.Control.WndProc(Message& m)
   em System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   em System.Windows.Forms.Form.WmShowWindow(Message& m)
   em System.Windows.Forms.Form.WndProc(Message& m)
   em System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   em System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   em System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

The line that causes all commands to be exported to .bat is this

 IO.File.WriteAllText(path.TextBox1.Text  "fastt.bat", sb.ToString())

Search multiple individual text strings, using "text contains" in Google Sheets

Go to Filter by condition Custom formula and insert the following:

=MATCH(A2, {"amazon", "amz", "azamon"}, 0)

A2: is the cell where your data starts and the row you are filtering (in example A1 it is the header and it is filtered by first row),
{"amazon", "amz", "azamon"} – list of its conditions.

Algorithms: given a list of strings, find each pair $ (x, y) $ where $ x $ is a sub sequence of $ and $. Possible to do better than $ O (n ^ 2) $?

Consider the following algorithmic problem: given a list of strings $ L = (s_1, s_2, dots, s_n) $, we want to know all the pairs $ (x, y) $ where $ x $ it is a sequence of $ and $. We can assume that all chains have a maximum length $ m $, where $ m << n $ and they are in a finite alphabet $ Sigma $ with $ | Sigma | << n $. We can also assume that the number of pairs $ (x, y) $ where $ x $ it is a sequence of $ and $ is much smaller than $ n $.

A trivial algorithm would be this:

1. foreach x in L:
2.   foreach y in L:
3.      if x is subsequence of y:
4.         OUTPUT x,y

However, this has complexity $ O (n ^ 2 cdot m) $ – I'm curious to know if there is a faster algorithm (faster given the number of pairs $ (x, y) $ is much smaller than $ n $, for example, an algorithm with complexity depending on the number of output pairs).

Note that this question is a follow-up to this question, which deals with the same problem but for substrings (not subsequences). There, the Aho-Corasick algorithm solved my problem perfectly: is there something like this but for sub-sequences?