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  • reading a line, tokenizing and assigning to struct in C

    - by Dervin Thunk
    line is fgets'd, and running in a while loop with counter n, d is a struct with 2 char arrays, p and q. Basically, in a few words, I want to read a line, separate it into 2 strings, one up until the first space, and the rest of the line. I clean up afterwards (\n from the file becomes \'0'). The code works, but is there a more idiomatic way to do this? What errors am I running into "unknowingly"? int spc = strcspn(line," "); strncpy(d[n].p, line, spc); d[n].p[spc+1]='\0'; int l = strlen(line)-spc; strncpy(d[n].q, line+spc+1, l); char* nl = strchr(d[n].q, '\n'); if(nl){ *nl='\0'; } n++; Thanks.

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  • Transmogrify into date from multiple columns

    - by Dave Jarvis
    What is a better way to program the following SQL: str_to_date( concat(convert(D.DAY, CHAR(2)), '-', convert(M.MONTH, CHAR(2)), '-', convert(M.YEAR, CHAR(4))), '%e-%m-%Y' ) as AMOUNT_DATE I want to convert the columns D.DAY, M.MONTH, and M.YEAR to a date field using MySQL. The above works, but seems much more complicated than it needs to be. (If there's an ANSI SQL way to do it, that would be even better.) Thank you!

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  • Finding if a sentence contains a specific phrase in Ruby

    - by TenJack
    Right now I am seeing if a sentence contains a specific word by splitting the sentence into an array and then doing an include to see if it contains the word. Something like: "This is my awesome sentence.".split(" ").include?('awesome') But I'm wondering what the fastest way to do this with a phrase is. Like if I wanted to see if the sentence "This is my awesome sentence." contains the phrase "my awesome sentence". I am scraping sentences and comparing a very large number of phrases, so speed is somewhat important.

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  • Escaping quotes twice in PHP

    - by Genadinik
    Hello, I have a complicated form where I first have to take some _GET parameters and obviously I have to do a mysql_real_escape_string() on them since I look stuff up in the database with them. Them problem for me is after the initial db lookup. When the user submits a form, I send them along as a _POST request and obviously have to do this mysql_real_escape_string call again just in case someone tries to hack my site with a faked form submission. Then the problem I have is the arguments are escaped twice and my queries begin to look strange like this: select field1 , field2 , from my_table where some_id = \'.$lookup_id.\' ... So the system seems to be adding \' and it is messing me up :) Also, in my other forms I have not seen such behavior. Any ideas on what may be causing this? One weird thing is that I tried to send unescaped parameters to the post, and the same problem happens. That is a clue, but not a sufficient one for me. :( Thanks, Alex

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  • Remove leading zero's from alphanumeic text

    - by cedar715
    I've seen questions to prefix zeros here in SO. But not the other way !! Can you guys suggest me how to remove the leading zeros in alphanumeric text. Are there any built-in APIs or do I need to write a method to trim the leading zero's? Example: 01234 converts to 1234 0001234a converts to 1234a 001234-a converts to 1234-a 101234 remains as 101234 2509398 remains as 2509398 123z remains as 123z 000002829839 converts to 2829839

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  • Multiply char by integer (c++)

    - by dubya
    Is it possible to multiply a char by an int? For example, I am trying to make a graph, with *'s for each time a number occurs. So something like, but this doesn't work char star = "*"; int num = 7; cout << star * num //to output 7 stars

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  • wchar to char in c++

    - by Chris
    I have a Windows CE console application that's entry point looks like this int _tmain(int argc, _TCHAR* argv[]) I want to check the contents of argv[1] for "-s" convert argv[2] into an integer. I am having trouble narrowing the arguments or accessing them to test. I initially tried the following with little success if (argv[1] == L"-s") I also tried using the narrow function of wostringstream on each character but this crashed the application. Can anyone shed some light? Thanks

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  • Getting ListView values into a string array?

    - by Andrew
    I have a ListView control set up in details mode, and on a button press I would like to retrieve all column values from that row in the ListView. This is my code so far: Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Dim items As ListView.SelectedListViewItemCollection = _ Me.ManageList.SelectedItems Dim item As ListViewItem Dim values(0 To 4) As String Dim i As Integer = 0 For Each item In items values(i) = item.SubItems(1).Text i = i + 1 Next End Sub But values just comes out as an empty array. Any ideas? I just want the values array to be filled with the data of that ListView row. Cheers.

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  • Ignoring characters in a file while parsing

    - by sfactor
    i need to parse through a text file and process the data. the valid data is usually denoted by either a timestamp with TS followed by 10 numbers (TS1040501134) or values with a alpabet followed by nine numbers (A098098098)...so it will be like TS1040501134A111111111B222222222...........TS1020304050A000000000........ However, there are cases when there will be filler 0s when there is no data. So, such a case might be 00000000000000000000TS1040501134A111111111B2222222220000000000TS1020304050A000000000........` Now as we can see I need to ignore these zeros. how might i do this? I am using gnu C.

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  • Compare versions as strings

    - by Dmitriy
    Comparing version numbers as strings is not so easy... "1.0.0.9" "1.0.0.10", but it's not correct. Obvious way to do it properly is parse these strings, convert to numbers and compare as numbers. Is it other way to do it more "elegant"? For example, boost::string_algo...

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  • Evaluate a string-expression in XSL

    - by Jerzakie
    Is there any way to evaluate a string expression in XSL? example: <myItem id="1"> <validator expression="$someVariable = '3'" /> </myItem> ... <xsl:variable name="someVariable" select="3" /> <xsl:if test="@expression"> ... I realize this syntax does not work the way I want it to, but is there any way to store the test expression in a variable and then evaluate the expression?

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  • Rendering Views as String with Spring MVC and Apache Tiles

    - by lynxforest
    I am trying to reuse some of my tiles in a controller which is returning a json response to the client. I would like to return a json response similar to the following format: { 'success': <true or false>, 'response': <the contents of an apache tile> } In my controller I would like to perform logic similar to this pseudocode: boolean valid = validator.validate(modelObj) String response = "" if(valid){ response = successView.render() // im looking for a way to actually accomplish // this, where the successView is the apache tiles view. // I would also need to pass a model map to the view somehow. }else{ response = errorView.render() } writeJsonResponse(httpResponse, /* a Map whose json representation looks like the one I described above. */)

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  • Url Rewriting with Querystrings

    - by Alon
    In IIS 7.5, I'm trying to rewrite a Url such as /about to /content.asp?p=about, with support for QueryString-s, so if the orginal Url was /about?x=y, it should rewrite to /content.asp?p=about&x=y. The basic rewriting is now working, but when I'm trying to add a QueryString it doesn't work. Tried both /about?x=y and /about&x=y. My current rule: <rule name="RewriteUserFriendlyURL1" stopProcessing="false"> <match url="^([^/]+)/?$" /> <conditions> <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" /> </conditions> <action type="Rewrite" url="content.asp?p={R:1}" /> </rule> How can I fix this? Thank you.

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  • Regex - Trim character at the end of a string

    - by Torez
    I am trying to remove a trailing - (dash) at the end of the string. Here is my code: <?php $str = 'SAVE $45! - Wed. Beach Co-ed 6s (Jul-Aug)'; echo ereg_replace('([^a-z0-9]+)','-',strtolower($str)); ?> produces this: save-45-wed-beach-co-ed-6s-jul-aug- How can I remove a specific trailing character only if its there, in this case the dash? Thanks in advance.

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  • C++ argv path specifier

    - by sub
    In the interpreter for my programming languages I have to correctly handle the parts in case the import function is called. I then need to check if such a file is in the /libs folder (located at the same place as my executeable!) and if it doesn't exist I have to check in the directory of the current script. How can I get the exact path to the directory where the executeable is located from argv? What is the best way to remove the file from the end of a path, e.g: C:/a/b/c/file.exe should become C:/a/b/c/

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  • What is the meaning of this C++ Error std::length_error

    - by Janusz
    While running my program I get this Error: terminate called after throwing an instance of 'std::length_error' what(): basic_string::_S_create Abort trap I know that you can't do much without the code but I think that error is to deep in the code to copy all of it. Maybe I can figure it out if I understand what this error means. Is this a sign for an issue with reading or writing at the wrong memory address? Is there something I can do to get more information about the problem from my program?

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  • how to write regular expression to validate a string using regex in C#

    - by Charu
    I need to validate a user input based on condition. i wrote a regular expression to do so, but it's failing not sure why. Can somebody point where i am making mistake? Regex AccuracyCodeHexRegex = new Regex(@"^[PTQA]((0|8)[01234567]){2}$"); This is what i am trying to validate(If the string is a subset of these strings then it is valid): Phh, Thh, Qhh, Ahh where 'h' is a hex digit in the set {00, 80, 01, 81, 02, 82, 03, 83, 04, 84, 05, 85, 06, 86, 07, 87} Ex: P00 is valid P20 is not valid

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  • faster strlen ?

    - by Jack
    Typical strlen() traverse from first character till it finds \0. This requires you to traverse each and every character. In algorithm sense, its O(N). Is there any faster way to do this where input is vaguely defined. Like: length would be less than 50, or length would be around 200 characters. I thought of lookup blocks and all but didn't get any optimization.

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  • c# warn if text box is empty or contains a non-whole number

    - by Jamaul Smith
    In my specific case, I need the value in propertyPriceTextBox to be numeric only, and a whole number. A value also has to be entered, and I can just Messagebox.Show() a warning and that's all I'd need to do. This is what I have so far. private void computeButton_Click(object sender, EventArgs e) { decimal propertyPrice; if ((decimal.TryParse(propertyPriceTextBox.Text, out propertyPrice))) decimal.Parse(propertyPriceTextBox.Text); { if (residentialRadioButton.Checked == true) commisionLabel.Text = (residentialCom * propertyPrice).ToString("c"); if (commercialRadioButton.Checked == true) commisionLabel.Text = (commercialCom * propertyPrice).ToString("c"); if (hillsRadioButton.Checked == true) countySalesTaxTextBox.Text = ( hilssTax * propertyPrice).ToString("c"); if (pascoRadioButton.Checked == true) countySalesTaxTextBox.Text = (pascoTax * propertyPrice).ToString("c"); if (polkRadioButton.Checked == true) countySalesTaxTextBox.Text = (polkTax * propertyPrice).ToString("c"); decimal result; result = (countySalesTaxTextBox.Text + stateSalesTaxTextBox.Text + propertyPriceTextBox.Text + comissionTextBox.Text).ToString("c"); } else (.) MessageBox.Show("Property Price must be a whole number."); }

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