Your format string is wrong. Change it to

    insert = DateTime.ParseExact(line[i], &quot;M/d/yyyy hh:mm&quot;, CultureInfo.InvariantCulture);

That&#39;s because you have the Date in American format in `line[i]` and UK format in the `FormatString`.

    11/20/2011
    M / d/yyyy

I&#39;m guessing you might need to change the FormatString to:
   
    &quot;M/d/yyyy h:mm&quot;

It&#39;s probably the same problem with cultures as presented in this related SO-thread: https://stackoverflow.com/questions/1368636/why-cant-datetime-parseexact-parse-9-1-2009-using-m-d-yyyy

You already specified the culture, so try escaping the slashes.

try this 


    var  insert = DateTime.ParseExact(line[i], &quot;M/d/yyyy h:mm&quot;, CultureInfo.InvariantCulture);

Looking for a regex/replace function to take a user inputted string say, &quot;John Smith&#39;s Cool Page&quot; and return a filename/url safe string like &quot;john_smith_s_cool_page.html&quot;, or something to that extent.


javascript url-safe filename-safe string

I&#39;m looking for an online tool that will allow me downloading an online SVN repository (google code etc.).

Do you know of anything?

**Update**  
I want to download the top parent folder and all its subfolders and content, without installing anything on my computer.

Download an SVN repository?

I have a tab delimited file which is being parsed and then inserted into a database. When I run into the date column, I have trouble parsing it.

The code I have is:

    var insert = DateTime.ParseExact(line[i], &quot;d/M/yyyy h:mm&quot;, CultureInfo.InvariantCulture);

The string in `line[i]` is in the formats: `7/7/2011 10:48` , `10/20/2011 6:27`

The exception I get says 

&gt; The DateTime represented by the string is not supported in calendar
&gt; System.Globalization.GregorianCalendar.


C# DateTime.ParseExact

I have a tab delimited file which is being parsed and then inserted into a database. When I run into the date column, I have trouble parsing it.
The code I have is:
<pre><code class="hljs language-ini">var insert = DateTime.ParseExact(line[i], "d/M/yyyy h:mm", CultureInfo.InvariantCulture);
</code></pre>
The string in <code>line[i]</code> is in the formats: <code>7/7/2011 10:48</code> , <code>10/20/2011 6:27</code>
The exception I get says
> The DateTime represented by the string is not supported in calendar
> System.Globalization.GregorianCalendar.

&gt; **Possible Duplicate:**  
&gt; [How to pass an event to a method?](https://stackoverflow.com/questions/2560258)  

&lt;!-- End of automatically inserted text --&gt;

Is it possible to pass an event as a parameter to a method?

For example, the following method subscribes to the event, does work, and unsubscribes from the event:

    void SubscribeDoAndUnsubscribe&lt;TElement, TEventArgs&gt;(
            IEnumerable&lt;TElement&gt; elements,
            ??? elementEvent)
        where TEventArgs: EventArgs
    {
        EventHandler&lt;TEventArgs&gt; handler = (sender, e) =&gt; { /* Handle an event */ };

        foreach (var element in elements)
        {
             // Subscribe somehow
             element.elementEvent += handler
        }

        // Do things

        foreach (var element in elements)
        {
             // Unsubscribe somehow
             element.elementEvent -= handler
        }
    }

Client code:

    var elements = new [] { new Button(), new Button() };
    SubscribeDoAndUnsubscribe(elements, ??? /* e =&gt; e.Click */);

If it&#39;s not possible, how do I achieve the similar logic in other ways? Shall I pass pair of delegates for subscribe/unsubscribe methods?



Pass an event as a parameter to a method

I was answering a [question][1] about the possibility of closures (legitimately) extending object-lifetimes when I ran into some *extremely* curious code-gen on the part of the C# compiler (4.0 if that matters). 

The shortest repro I can find is the following:

1. Create a lambda that captures a local while calling a  *static* method of the containing type.
2. Assign the generated delegate-reference to an *instance* field of the containing object.

Result: The compiler creates a closure-object that references the object that created the lambda, when it has no reason to - the &#39;inner&#39; target of the delegate is a *static* method, and the lambda-creating-object&#39;s instance members needn&#39;t be (and aren&#39;t) touched when the delegate is executed. Effectively, the compiler is acting like the programmer has captured `this` without reason.

    class Foo
    {
        private Action _field;

        public void InstanceMethod()
        {
            var capturedVariable = Math.Pow(42, 1);

            _field = () =&gt; StaticMethod(capturedVariable);
        }

        private static void StaticMethod(double arg) { }
    }

The generated code from a release build (decompiled to &#39;simpler&#39; C#) looks like this:

    public void InstanceMethod()
    {
       
        &lt;&gt;c__DisplayClass1 CS$&lt;&gt;8__locals2 = new &lt;&gt;c__DisplayClass1();

        CS$&lt;&gt;8__locals2.&lt;&gt;4__this = this; // What&#39;s this doing here?

        CS$&lt;&gt;8__locals2.capturedVariable = Math.Pow(42.0, 1.0);
        this._field = new Action(CS$&lt;&gt;8__locals2.&lt;InstanceMethod&gt;b__0);
    }

    [CompilerGenerated]
    private sealed class &lt;&gt;c__DisplayClass1
    {
        // Fields
        public Foo &lt;&gt;4__this; // Never read, only written to.
        public double capturedVariable;
    
        // Methods
        public void &lt;InstanceMethod&gt;b__0()
        {
            Foo.StaticMethod(this.capturedVariable);
        }
    }

Observe that  `&lt;&gt;4__this` field of the closure object is populated with an object reference but is never read from (there is no reason).

So what&#39;s going on here? Does the language-specification allow for it?  Is this a compiler bug / oddity or is there a good reason (that I&#39;m clearly missing) for the closure to reference the object? This makes me anxious because this looks like a recipe for closure-happy programmers (like me) to unwittingly introduce strange memory-leaks (imagine if the delegate were used as an event-handler) into programs. 



 
 

 


 

 


  [1]: https://stackoverflow.com/questions/8417470/private-field-captured-in-anonymous-delegate

Is this object-lifetime-extending-closure a C# compiler bug?

Just recently, my Visual Studio 2010 stopped displaying IntelliSense suggestions automatically while I am typing.  I can still press ctrl+space to get it to work, but it doesn&#39;t automatically show a list of suggestions like it used to.  I have already tried disabling all my extensions, restarting VS and the computer, and I have checked all the appropriate settings (Options -&gt; Text Editor -&gt; C# -&gt; IntelliSense) to make sure that it is set to offer suggestions after a character is typed.

Has anyone seen this behavior before?  Does anyone have any other suggestions for how I can get IntelliSense to go back to the way things were before?  If not, I might just have to do a fresh reinstall of VS...

Visual Studio C# IntelliSense not automatically displaying

I recently posted about issues with encrypting large data with RSA, I am finally done with that and now I am moving on to implementing signing with a user&#39;s private key and verifying with the corresponding public key. However, whenever I compare the signed data and the original message I basically just get false returned. I am hoping some of your could see what I am doing wrong.

Here is the code:

    public static string SignData(string message, RSAParameters privateKey)
        {
            //// The array to store the signed message in bytes
            byte[] signedBytes;
            using (var rsa = new RSACryptoServiceProvider())
            {
                //// Write the message to a byte array using UTF8 as the encoding.
                var encoder = new UTF8Encoding();
                byte[] originalData = encoder.GetBytes(message);
                
                try
                {
                    //// Import the private key used for signing the message
                    rsa.ImportParameters(privateKey);

                    //// Sign the data, using SHA512 as the hashing algorithm 
                    signedBytes = rsa.SignData(originalData, CryptoConfig.MapNameToOID(&quot;SHA512&quot;));
                }
                catch (CryptographicException e)
                {
                    Console.WriteLine(e.Message);
                    return null;
                }
                finally
                {
                    //// Set the keycontainer to be cleared when rsa is garbage collected.
                    rsa.PersistKeyInCsp = false;
                }
            }
            //// Convert the a base64 string before returning
            return Convert.ToBase64String(signedBytes);
        }

So that is the first step, to sign the data, next I move on to verifying the data:

    public static bool VerifyData(string originalMessage, string signedMessage, RSAParameters publicKey)
        {
            bool success = false;
            using (var rsa = new RSACryptoServiceProvider())
            {
                byte[] bytesToVerify = Convert.FromBase64String(originalMessage);
                byte[] signedBytes = Convert.FromBase64String(signedMessage);
                try
                {
                    rsa.ImportParameters(publicKey);

                    SHA512Managed Hash = new SHA512Managed();

                    byte[] hashedData = Hash.ComputeHash(signedBytes);

                    success = rsa.VerifyData(bytesToVerify, CryptoConfig.MapNameToOID(&quot;SHA512&quot;), signedBytes);
                }
                catch (CryptographicException e)
                {
                    Console.WriteLine(e.Message);
                }
                finally
                {
                    rsa.PersistKeyInCsp = false;
                }
            }
            return success;
        }

And here is the test client:

    public static void Main(string[] args)
        {
            PublicKeyInfrastructure pki = new PublicKeyInfrastructure();
            Cryptograph crypto = new Cryptograph();
            RSAParameters privateKey = crypto.GenerateKeys(&quot;email@email.com&quot;);

            const string PlainText = &quot;This is really sent by me, really!&quot;;
 
            RSAParameters publicKey = crypto.GetPublicKey(&quot;email@email.com&quot;);

            string encryptedText = Cryptograph.Encrypt(PlainText, publicKey);

            Console.WriteLine(&quot;This is the encrypted Text:&quot; + &quot;\n &quot; + encryptedText);

            string decryptedText = Cryptograph.Decrypt(encryptedText, privateKey);

            Console.WriteLine(&quot;This is the decrypted text: &quot; + decryptedText);

            string messageToSign = encryptedText;

            string signedMessage = Cryptograph.SignData(messageToSign, privateKey);

            //// Is this message really, really, REALLY sent by me?
            bool success = Cryptograph.VerifyData(messageToSign, signedMessage, publicKey);

            Console.WriteLine(&quot;Is this message really, really, REALLY sent by me? &quot; + success);
            
        }

Am I missing a step here? According to the Cryptography API and the examples there, I shouldn&#39;t manually compute any hashes, since I supply the algorithm within the method call itself.

Any help will be greatly appreciated.



Signing and verifying signatures with RSA C#

I&#39;ve been using [ReSharper][1] for a while now and sometimes it suggests that I invert the `if`. I guess an example would be a better explanation of my situation:

    public void myfunction(int exampleParam){
        if(exampleParam &gt; 0){
            //Do something with form controls for example.
        }
    }

Now ReSharper suggests that I invert the `if` to this:

    public void myfunction(int exampleParam){
        if(exampleParam &lt;= 0)
            return;
        //Do something with form controls for example
    }

Does this &quot;improve&quot; performance somehow? Or is it just aesthetic?

  [1]: http://www.jetbrains.com/resharper/

Does inverting the &quot;if&quot; improve performance?

How do you identify whether a grammar is LL(1), LR(0), or SLR(1)?

Can anyone please explain it using this example, or any other example?

&gt; X &amp;rarr; Yz | a
&gt;
&gt;Y &amp;rarr; bZ | &amp;epsilon;
&gt;
&gt; Z &amp;rarr; &amp;epsilon;

 

How to identify whether a grammar is LL(1), LR(0) or SLR(1)?

I want to get all the values from a section using config parser 

I used this but it gives only the first value

    def ConfigSectionMap(section):
      dict1 = {}
      options = Config.options(section)
      for option in options:
        try:
          dict1[option] = Config.get(section, option)
          if dict1[option] == -1:
            DebugPrint(&quot;skip: %s&quot; % option)
        except:
          print(&quot;exception on %s!&quot; % option)
          dict1[option] = None
        return dict1
    
    
      Config = ConfigParser.ConfigParser()
      Config.read(&quot;/etc/harvest.conf&quot;)
      print ConfigSectionMap(&quot;files&quot;).values()

Python config parser to get all the values from a section?

I need to parse a URL string like this one:

    &amp;ad_eurl=http://www.youtube.com/video/4bL4FI1Gz6s&amp;hl=it_IT&amp;iv_logging_level=3&amp;ad_flags=0&amp;endscreen_module=http://s.ytimg.com/yt/swfbin/endscreen-vfl6o3XZn.swf&amp;cid=241&amp;cust_gender=1&amp;avg_rating=4.82280613104

I need to split the NSString up into the signle parts like `cid=241` and `&amp;avg_rating=4.82280613104`. I&#39;ve been doing this with `substringWithRange:` but the values return in a random order, so that messes it up. Is there any class that allows easy parsing where you can basically convert it to NSDictionary to be able to read the value for a key (for example ValueForKey:`cid` should return `241`). Or is there just another easier way to parse it than using `NSMakeRange` to get a substring?

Best way to parse URL string to get values for keys?

I&#39;m unable to find `file.ReadLine` function in Go.

How does one read a file line by line?




Reading a file line by line in Go

I have a AJAX call that returns some JSON like this:

    $(document).ready(function () {
    	$.ajax({ 
    		type: &#39;GET&#39;, 
    		url: &#39;http://example/functions.php&#39;, 
    		data: { get_param: &#39;value&#39; }, 
    		success: function (data) { 
                var names = data
    			$(&#39;#cand&#39;).html(data);
    		}
    	});
    });

Inside the `#cand` div I&#39;ll get:

    [ { &quot;id&quot; : &quot;1&quot;, &quot;name&quot; : &quot;test1&quot; },
      { &quot;id&quot; : &quot;2&quot;, &quot;name&quot; : &quot;test2&quot; },
      { &quot;id&quot; : &quot;3&quot;, &quot;name&quot; : &quot;test3&quot; },
      { &quot;id&quot; : &quot;4&quot;, &quot;name&quot; : &quot;test4&quot; },
      { &quot;id&quot; : &quot;5&quot;, &quot;name&quot; : &quot;test5&quot; } ]

How can I loop through this data and place each name in a div?

How to parse JSON data with jQuery / JavaScript?

I have two objects that represent the same event instance --- one holds the date, the other the time of this event, and I want to create a datetime object. 

Since one can&#39;t simply add date and time objects (following call fails): 

     datetime.date(2011, 01, 01) + datetime.time(10, 23)



Pythonic way to combine datetime.date and datetime.time objects

I have a time to which I want to add an hour:

    $time = &#39;10:09&#39;;

I&#39;ve tried:

    $time = strtotime(&#39;+1 hour&#39;);

    strtotime(&#39;+1 hour&#39;, $time);

    $time = date(&#39;H:i&#39;, strtotime(&#39;+1 hour&#39;));

But none of the above work.

Adding 1 hour to time variable

I&#39;m trying to generate an [RFC 3339][1] UTC timestamp in Python. So far I&#39;ve been able to do the following:

    &gt;&gt;&gt; d = datetime.datetime.now()
    &gt;&gt;&gt; print d.isoformat(&#39;T&#39;)
    2011-12-18T20:46:00.392227

My problem is with setting the UTC offset.

According to the [docs][2], the classmethod `datetime.now([tz])`, takes an optional `tz` argument where `tz must be an instance of a class tzinfo subclass`, and `datetime.tzinfo` is `an abstract base class for time zone information objects.`

This is where I get lost- How come tzinfo is an abstract class, and how am I supposed to implement it? 

---

(**NOTE:** In PHP it&#39;s as simple as `timestamp = date(DATE_RFC3339);`, which is why I can&#39;t understand why Python&#39;s approach is so convoluted...)

  [1]: https://www.rfc-editor.org/rfc/rfc3339
  [2]: http://docs.python.org/library/datetime.html

Generate RFC 3339 timestamp in Python

How can I get UTC/GMT +/- time stamp using PHP&#39;s date() function? For example, if I try

    date(&quot;Y-m-d H:i:s&quot;, time()); 

I will get Unix time stamp; but I need to get UTC/GMT time stamp with string GMT/UTC+/-0400 or GMT/UTC+/-1000 based on local timings.

get UTC time in PHP

I am dealing with dates in Python and I need to convert them to UTC timestamps to be used
inside Javascript. The following code does not work:

    &gt;&gt;&gt; d = datetime.date(2011,01,01)
    &gt;&gt;&gt; datetime.datetime.utcfromtimestamp(time.mktime(d.timetuple()))
    datetime.datetime(2010, 12, 31, 23, 0)

Converting the date object first to datetime also does not help. I tried the example at this [link][1] from, but:

    from pytz import utc, timezone
    from datetime import datetime
    from time import mktime
    input_date = datetime(year=2011, month=1, day=15)

and now either:

    mktime(utc.localize(input_date).utctimetuple())

or

    mktime(timezone(&#39;US/Eastern&#39;).localize(input_date).utctimetuple())

does work.

So general question: how can I get a date converted to seconds since epoch according to UTC?


  [1]: http://www.reddit.com/r/Python/comments/hkw9u/create_utc_timestamp_for_given_date

Content Type	Original Author	Original Content on Stackoverflow
Question	Jonathan	View Question on Stackoverflow
Solution 1 - C#	Fischermaen	View Answer on Stackoverflow
Solution 2 - C#	DaveShaw	View Answer on Stackoverflow
Solution 3 - C#	Pieter	View Answer on Stackoverflow
Solution 4 - C#	Glory Raj	View Answer on Stackoverflow

C# DateTime.ParseExact

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Download an SVN repository?

javascript url-safe filename-safe string

Attributions