SyntaxFix.com - Programming Questions & Answers Hub For Beginners

Since python is installed on nearly every non-Windows OS by default now, the only thing you really need to make sure of is that all of the non-standard libraries you use are installed.

Having said that, it is possible to build executables that include the python interpreter, and any libraries you use. This is likely to create a large executable, however.

MacOS X even includes support in the Xcode IDE for creating full standalone GUI apps. These can be run by any user running OS X.

Alternative text editors? Try Diakonos, "a Linux editor for the masses". The default keyboard mapping is as expected for cut, copy, paste, undo, open, save, etc.

I do a lot of advanced web scraping so wanted to have total control over my stack and understand the limitations. This webscraping library is the result.

%d--> for int

%u--> for unsigned int

%ld--> for long int or long

%lu--> for unsigned long int or long unsigned int or unsigned long

%lld--> for long long int or long long

%llu--> for unsigned long long int or unsigned long long

LinqPad is great for testing linq to objects/xml/sql. Free download.

You can leverage a Number table to do the string parsing.

Create a physical numbers table:

    create table dbo.Numbers (N int primary key);
    insert into dbo.Numbers
        select top 1000 row_number() over(order by number) from master..spt_values
    go

Create test table with 1000000 rows

    create table #yak (i int identity(1,1) primary key, array varchar(50))

    insert into #yak(array)
        select 'a,b,c' from dbo.Numbers n cross join dbo.Numbers nn
    go

Create the function

    create function [dbo].[ufn_ParseArray]
        (   @Input      nvarchar(4000), 
            @Delimiter  char(1) = ',',
            @BaseIdent  int
        )
    returns table as
    return  
        (   select  row_number() over (order by n asc) + (@BaseIdent - 1) [i],
                    substring(@Input, n, charindex(@Delimiter, @Input + @Delimiter, n) - n) s
            from    dbo.Numbers
            where   n <= convert(int, len(@Input)) and
                    substring(@Delimiter + @Input, n, 1) = @Delimiter
        )
    go

Usage (outputs 3mil rows in 40s on my laptop)

    select * 
    from #yak 
    cross apply dbo.ufn_ParseArray(array, ',', 1)

cleanup

    drop table dbo.Numbers;
    drop function  [dbo].[ufn_ParseArray]

Performance here is not amazing, but calling a function over a million row table is not the best idea. If performing a string split over many rows I would avoid the function.

To solve this problem, I have used some CSS tricks and the following works for me.

input {
    text-security:disc;
    -webkit-text-security:disc;
    -mox-text-security:disc;
}

Please read this article for further detail.

I've been obfuscating code in the same application since .Net 1, and it's been a major headache from a maintenance perspective. As you've mentioned, the serialization problem can be avoided, but it's really easy to make a mistake and obfuscate something you didn't want obfuscated. It's easy to break the build, or to change the obfuscation pattern and not be able to open old files. Plus it can be difficult to find out what went wrong and where.

Our choice was Xenocode, and were I to make the choice again today I would prefer to not obfuscate the code, or use Dotfuscator.

Try out Vertabelo!

It's an online database modeler that supports reverse enginnering.

Just create free of charge Vertabelo account, import an existing database into Vertabelo and voila - your database is in Vertabelo!

It supports following databases:

• PostgreSQL,
• MySQL,
• Oracle,
• IBM DB2,
• HSQLDB,
• MS SQL Server.

I know that this question has been already answered, but I've created pretty useful sp which will create a dynamic delete statement for a table duplicates:

    CREATE PROCEDURE sp_DeleteDuplicate @tableName varchar(100), @DebugMode int =1
AS 
BEGIN
SET NOCOUNT ON;

IF(OBJECT_ID('tempdb..#tableMatrix') is not null) DROP TABLE #tableMatrix;

SELECT ROW_NUMBER() OVER(ORDER BY name) as rn,name into #tableMatrix FROM sys.columns where [object_id] = object_id(@tableName) ORDER BY name

DECLARE @MaxRow int = (SELECT MAX(rn) from #tableMatrix)
IF(@MaxRow is null)
    RAISERROR  ('I wasn''t able to find any columns for this table!',16,1)
ELSE 
    BEGIN
DECLARE @i int =1 
DECLARE @Columns Varchar(max) ='';

WHILE (@i <= @MaxRow)
BEGIN 
    SET @Columns=@Columns+(SELECT '['+name+'],' from #tableMatrix where rn = @i)

    SET @i = @i+1;
END

---DELETE LAST comma
SET @Columns = LEFT(@Columns,LEN(@Columns)-1)

DECLARE @Sql nvarchar(max) = '
WITH cteRowsToDelte
     AS (
SELECT ROW_NUMBER() OVER (PARTITION BY '+@Columns+' ORDER BY ( SELECT 0)) as rowNumber,* FROM '+@tableName
+')

DELETE FROM cteRowsToDelte
WHERE  rowNumber > 1;
'
SET NOCOUNT OFF;
    IF(@DebugMode = 1)
       SELECT @Sql
    ELSE
       EXEC sp_executesql @Sql
    END
END

So if you create table like that:

IF(OBJECT_ID('MyLitleTable') is not null)
    DROP TABLE MyLitleTable 


CREATE TABLE MyLitleTable
(
    A Varchar(10),
    B money,
    C int
)
---------------------------------------------------------

    INSERT INTO MyLitleTable VALUES
    ('ABC',100,1),
    ('ABC',100,1), -- only this row should be deleted
    ('ABC',101,1),
    ('ABC',100,2),
    ('ABCD',100,1)

    -----------------------------------------------------------

     exec sp_DeleteDuplicate 'MyLitleTable',0

It will delete all duplicates from your table. If you run it without the second parameter it will return a SQL statement to run.

If you need to exclude any of the column just run it in the debug mode get the code and modify it whatever you like.

if you are trying to get the elements only but not the functions then this code can help you

this.getKeys = function() {

var keys = new Array();
for(var key in this) {

    if( typeof this[key] !== 'function') {

        keys.push(key);
    }
}
return keys;

}

this is part of my implementation of the HashMap and I only want the keys, this is the hashmap object that contains the keys

If you are using Joseph's answer which is a great answer, and you run these back to back like this:

dim i = GetRandom(1, 1715)
dim o = GetRandom(1, 1715)

Then the result could come back the same over and over because it processes the call so quickly. This may not have been an issue in '08, but since the processors are much faster today, the function doesn't allow the system clock enough time to change prior to making the second call.

Since the System.Random() function is based on the system clock, we need to allow enough time for it to change prior to the next call. One way of accomplishing this is to pause the current thread for 1 millisecond. See example below:

Public Function GetRandom(ByVal min as Integer, ByVal max as Integer) as Integer
    Static staticRandomGenerator As New System.Random
    max += 1
    Return staticRandomGenerator.Next(If(min > max, max, min), If(min > max, min, max))
End Function

This script is ok except for this case that of course, I've met :

INSERT INTO "requestcomparison_stopword" VALUES(149,'f');
INSERT INTO "requestcomparison_stopword" VALUES(420,'t');

The script should give this output :

INSERT INTO requestcomparison_stopword VALUES(149,'f');
INSERT INTO requestcomparison_stopword VALUES(420,'t');

But gives instead that output :

INSERT INTO requestcomparison_stopword VALUES(1490;
INSERT INTO requestcomparison_stopword VALUES(4201;

with some strange non-ascii characters around the last 0 and 1.

This didn't show up anymore when I commented the following lines of the code (43-46) but others problems appeared:

    line = re.sub(r"([^'])'t'(.)", "\1THIS_IS_TRUE\2", line)
    line = line.replace('THIS_IS_TRUE', '1')
    line = re.sub(r"([^'])'f'(.)", "\1THIS_IS_FALSE\2", line)
    line = line.replace('THIS_IS_FALSE', '0')

This is just a special case, when we want to add a value being 'f' or 't' but I'm not really comfortable with regular expressions, I just wanted to spot this case to be corrected by someone.

Anyway thanks a lot for that handy script !!!

it's well documented here:

https://cwiki.apache.org/confluence/display/TOMCAT/Connectors#Connectors-Q6

How do I bind to a specific ip address? - "Each Connector element allows an address property. See the HTTP Connector docs or the AJP Connector docs". And HTTP Connectors docs:

http://tomcat.apache.org/tomcat-7.0-doc/config/http.html

Standard Implementation -> address

"For servers with more than one IP address, this attribute specifies which address will be used for listening on the specified port. By default, this port will be used on all IP addresses associated with the server."

This is such a basic thing to do I wouldn't use an external library (it will cause a dependency in your project that you probably don't need).

We have a class of static methods specifically crafted to do these sort of jobs. Because the code for this is so simple we let Hotspot do the optimization for us. This seems to be a theme in my code recently: write very simple (straightforward) code and let Hotspot do its magic. We rarely have performance issues around code like this - when a new VM version comes along you get all the extra speed benefits etc.

As much as I love Jakarta collections, they don't support Generics and use 1.4 as the LCD. I am wary of Google Collections because they are listed as Alpha support level!

I agree that cygwin/OpenSSH is the best choice, but its setup can be involved to say the least. Here is a document to get you started though: Installing OpenSSH

None of the answers return false for empty strings, a fix for that...

function is_numeric(n)
{
 return (n != '' && !isNaN(parseFloat(n)) && isFinite(n));
}

For Ubuntu 14.04

1. Check core dump enabled:

   ulimit -a
   

2. One of the lines should be :

   core file size          (blocks, -c) unlimited
   

3. If not :

   gedit ~/.bashrc and add ulimit -c unlimited to end of file and save, re-run terminal.

4. Build your application with debug information :

   In Makefile -O0 -g

5. Run application that create core dump (core dump file with name ‘core’ should be created near application_name file):

   ./application_name
   

6. Run under gdb:

   gdb application_name core
   

HOW TO ROUND UP THE RESULT OF INTEGER DIVISION IN C#

I was interested to know what the best way is to do this in C# since I need to do this in a loop up to nearly 100k times. Solutions posted by others using Math are ranked high in the answers, but in testing I found them slow. Jarod Elliott proposed a better tactic in checking if mod produces anything.

int result = (int1 / int2);
if (int1 % int2 != 0) { result++; }

I ran this in a loop 1 million times and it took 8ms. Here is the code using Math:

int result = (int)Math.Ceiling((double)int1 / (double)int2);

Which ran at 14ms in my testing, considerably longer.

I have another way to do this if you're using Nuget to manage your dependencies. I've discovered that sometimes VS and Nuget don't match up and Nuget is unable to recognize that your projects are out of sync. The packages.config will say one thing but the path shown in References - Properties will indicate something else.

If you're willing to update your dependencies, do the following:

1. From Solution Explorer, right click the Project and click 'Manage Nuget Packages'

2. Select 'Installed packages' tab in left pane Record your installed packages You may want to copy your packages.config to your desktop first if you have a lot, so you can cross check it with Google to see what Nuget pkgs are installed

3. Uninstall your packages. Its OK, we're going to add them right back.

4. Immediately install the packages you need. What Nuget will do is not only get you the latest version, but will alter your references, and also add the binding redirects for you.

5. Do this for all of your projects.

6. At the solution level, do a Clean and Rebuild.

You may want to start with the lower projects and work your way to the higher level ones, and rebuild each project as you go along.

If you don't want to update your dependencies, then you can use the package manager console, and use the syntax Update-Package -ProjectName [yourProjectName] [packageName] -Version [versionNumber]

You control the access rights for members and functions using Private/Protected/Public right? so assuming the idea of each and every one of those 3 levels is clear, then it should be clear that we are missing something...

The declaration of a member/function as protected for example is pretty generic. You are saying that this function is out of reach for everyone (except for an inherited child of course). But what about exceptions? every security system lets you have some type of 'white list" right?

So friend lets you have the flexibility of having rock solid object isolation, but allows for a "loophole" to be created for things that you feel are justified.

I guess people say it is not needed because there is always a design that will do without it. I think it is similar to the discussion of global variables: You should never use them, There is always a way to do without them... but in reality, you see cases where that ends up being the (almost) most elegant way... I think this is the same case with friends.

It doesn't really do any good, other than let you access a member variable without using a setting function

well that is not exactly the way to look at it. The idea is to control WHO can access what, having or not a setting function has little to do with it.

Just to add my 2 cents, I'd write my own PHP Script:

http://php.net/manual/en/function.mail.php

There are lots of ways to do the attachment in the examples on that page.

For a more in depth approach read Comparing floating point numbers. Here is the code snippet from that link:

// Usable AlmostEqual function    
bool AlmostEqual2sComplement(float A, float B, int maxUlps)    
{    
    // Make sure maxUlps is non-negative and small enough that the    
    // default NAN won't compare as equal to anything.    
    assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024);    
    int aInt = *(int*)&A;    
    // Make aInt lexicographically ordered as a twos-complement int    
    if (aInt < 0)    
        aInt = 0x80000000 - aInt;    
    // Make bInt lexicographically ordered as a twos-complement int    
    int bInt = *(int*)&B;    
    if (bInt < 0)    
        bInt = 0x80000000 - bInt;    
    int intDiff = abs(aInt - bInt);    
    if (intDiff <= maxUlps)    
        return true;    
    return false;    
}

AList object allows you to create a list, add things to it, remove it, update it, index into it and etc. List is used whenever you just want a generic List where you specify object type in it and that's it.

IList on the other hand is an Interface. Basically, if you want to create your own type of List, say a list class called BookList, then you can use the Interface to give you basic methods and structure to your new class. IList is for when you want to create your own, special sub-class that implements List.

Another difference is: IList is an Interface and cannot be instantiated. List is a class and can be instantiated. It means:

IList<string> MyList = new IList<string>();

List<string> MyList = new List<string>

There's also http://xsd2xml.com/, an online XSD to XML generator

NetBeans has some really solid Ruby support.

1 small change: n-1 instead of n.

select *
from thetable
limit n-1, 1

@Brian I use lambdas all the time in C#, in LINQ and non-LINQ operators. Example:

string[] GetCustomerNames(IEnumerable<Customer> customers)
 { return customers.Select(c=>c.Name);
 }

Before C#, I used anonymous functions in JavaScript for callbacks to AJAX functions, before the term Ajax was even coined:

getXmlFromServer(function(result) {/*success*/}, function(error){/*fail*/});

The interesting thing with C#'s lambda syntax, though, is that on their own their type cannot be infered (i.e., you can't type var foo = (x,y) => x * y) but depending on which type they're assigned to, they'll be compiled as delegates or abstract syntax trees representing the expression (which is how LINQ object mappers do their "language-integrated" magic).

Lambdas in LISP can also be passed to a quotation operator and then traversed as a list of lists. Some powerful macros are made this way.

After the advice here, I have devised the following function in VB which creates passable, although not always perfect (if a company name and a suite line are given, it combines the suite and city) usable data. Please feel free to comment/refactor/yell at me for breaking one of my own rules, etc.:

Public Function parseAddress(ByVal input As String) As Collection
    input = input.Replace(",", "")
    input = input.Replace("  ", " ")
    Dim splitString() As String = Split(input)
    Dim streetMarker() As String = New String() {"street", "st", "st.", "avenue", "ave", "ave.", "blvd", "blvd.", "highway", "hwy", "hwy.", "box", "road", "rd", "rd.", "lane", "ln", "ln.", "circle", "circ", "circ.", "court", "ct", "ct."}
    Dim address1 As String
    Dim address2 As String = ""
    Dim city As String
    Dim state As String
    Dim zip As String
    Dim streetMarkerIndex As Integer

    zip = splitString(splitString.Length - 1).ToString()
    state = splitString(splitString.Length - 2).ToString()
    streetMarkerIndex = getLastIndexOf(splitString, streetMarker) + 1
    Dim sb As New StringBuilder

    For counter As Integer = streetMarkerIndex To splitString.Length - 3
        sb.Append(splitString(counter) + " ")
    Next counter
    city = RTrim(sb.ToString())
    Dim addressIndex As Integer = 0

    For counter As Integer = 0 To streetMarkerIndex
        If IsNumeric(splitString(counter)) _
            Or splitString(counter).ToString.ToLower = "po" _
            Or splitString(counter).ToString().ToLower().Replace(".", "") = "po" Then
                addressIndex = counter
            Exit For
        End If
    Next counter

    sb = New StringBuilder
    For counter As Integer = addressIndex To streetMarkerIndex - 1
        sb.Append(splitString(counter) + " ")
    Next counter

    address1 = RTrim(sb.ToString())

    sb = New StringBuilder

    If addressIndex = 0 Then
        If splitString(splitString.Length - 2).ToString() <> splitString(streetMarkerIndex + 1) Then
            For counter As Integer = streetMarkerIndex To splitString.Length - 2
                sb.Append(splitString(counter) + " ")
            Next counter
        End If
    Else
        For counter As Integer = 0 To addressIndex - 1
            sb.Append(splitString(counter) + " ")
        Next counter
    End If
    address2 = RTrim(sb.ToString())

    Dim output As New Collection
    output.Add(address1, "Address1")
    output.Add(address2, "Address2")
    output.Add(city, "City")
    output.Add(state, "State")
    output.Add(zip, "Zip")
    Return output
End Function

Private Function getLastIndexOf(ByVal sArray As String(), ByVal checkArray As String()) As Integer
    Dim sourceIndex As Integer = 0
    Dim outputIndex As Integer = 0
    For Each item As String In checkArray
        For Each source As String In sArray
            If source.ToLower = item.ToLower Then
                outputIndex = sourceIndex
                If item.ToLower = "box" Then
                    outputIndex = outputIndex + 1
                End If
            End If
            sourceIndex = sourceIndex + 1
        Next
        sourceIndex = 0
    Next
    Return outputIndex
End Function

Passing the parseAddress function "A. P. Croll & Son 2299 Lewes-Georgetown Hwy, Georgetown, DE 19947" returns:

2299 Lewes-Georgetown Hwy
A. P. Croll & Son  
Georgetown
DE
19947

I think several of the answers hit around the possible solution to your problem.

I agree the easiest (and best solution for SEO purposes) is the 301 redirect. In IIS this is fairly trivial, you'd create a site for subdomain.hostone.com, after creating the site, right-click on the site and go into properties. Click on the "Home Directory" tab of the site properties window that opens. Select the radio button "A redirection to a URL", enter the url for the new site (http://subdomain.hosttwo.com), and check the checkboxes for "The exact URL entered above", "A permanent redirection for this resource" (this second checkbox causes a 301 redirect, instead of a 302 redirect). Click OK, and you're done.

Or you could create a page on the site of http://subdomain.hostone.com, using one of the following methods (depending on what the hosting platform supports)

PHP Redirect:

<?
Header( "HTTP/1.1 301 Moved Permanently" ); 
Header( "Location: http://subdomain.hosttwo.com" ); 
?>

ASP Redirect:

<%@ Language=VBScript %>
<%
Response.Status="301 Moved Permanently"
Response.AddHeader "Location","http://subdomain.hosttwo.com"
%>

ASP .NET Redirect:

<script runat="server">
private void Page_Load(object sender, System.EventArgs e)
{
Response.Status = "301 Moved Permanently";
Response.AddHeader("Location","http://subdomain.hosttwo.com");
}
</script>

Now assuming your CNAME record is correctly created, then the only problem you are experiencing is that the site created for http://subdomain.hosttwo.com is using a shared IP, and host headers to determine which site should be displayed. To resolve this issue under IIS, in IIS Manager on the web server, you'd right-click on the site for subdomain.hosttwo.com, and click "Properties". On the displayed "Web Site" tab, you should see an "Advanced" button next to the IP address that you'll need to click. On the "Advanced Web Site Identification" window that appears, click "Add". Select the same IP address that is already being used by subdomain.hosttwo.com, enter 80 as the TCP port, and then enter subdomain.hosttwo.com as the Host Header value. Click OK until you are back to the main IIS Manager window, and you should be good to go. Open a browser, and browse to http://subdomain.hostone.com, and you'll see the site at http://subdomain.hosttwo.com appear, even though your URL shows http://subdomain.hostone.com

Hope that helps...

Hmm, not sure I agree with Nick re tag being similar to a branch. A tag is just a marker

• Trunk would be the main body of development, originating from the start of the project until the present.

• Branch will be a copy of code derived from a certain point in the trunk that is used for applying major changes to the code while preserving the integrity of the code in the trunk. If the major changes work according to plan, they are usually merged back into the trunk.

• Tag will be a point in time on the trunk or a branch that you wish to preserve. The two main reasons for preservation would be that either this is a major release of the software, whether alpha, beta, RC or RTM, or this is the most stable point of the software before major revisions on the trunk were applied.

In open source projects, major branches that are not accepted into the trunk by the project stakeholders can become the bases for forks -- e.g., totally separate projects that share a common origin with other source code.

The branch and tag subtrees are distinguished from the trunk in the following ways:

Subversion allows sysadmins to create hook scripts which are triggered for execution when certain events occur; for instance, committing a change to the repository. It is very common for a typical Subversion repository implementation to treat any path containing "/tag/" to be write-protected after creation; the net result is that tags, once created, are immutable (at least to "ordinary" users). This is done via the hook scripts, which enforce the immutability by preventing further changes if tag is a parent node of the changed object.

Subversion also has added features, since version 1.5, relating to "branch merge tracking" so that changes committed to a branch can be merged back into the trunk with support for incremental, "smart" merging.

In .NET Core and .NET Framework =4.0 there is a generic parse method:

Enum.TryParse("Active", out StatusEnum myStatus);

This also includes C#7's new inline out variables, so this does the try-parse, conversion to the explicit enum type and initialises+populates the myStatus variable.

If you have access to C#7 and the latest .NET this is the best way.

Original Answer

In .NET it's rather ugly (until 4 or above):

StatusEnum MyStatus = (StatusEnum) Enum.Parse(typeof(StatusEnum), "Active", true);

I tend to simplify this with:

public static T ParseEnum<T>(string value)
{
    return (T) Enum.Parse(typeof(T), value, true);
}

Then I can do:

StatusEnum MyStatus = EnumUtil.ParseEnum<StatusEnum>("Active");

One option suggested in the comments is to add an extension, which is simple enough:

public static T ToEnum<T>(this string value)
{
    return (T) Enum.Parse(typeof(T), value, true);
}

StatusEnum MyStatus = "Active".ToEnum<StatusEnum>();

Finally, you may want to have a default enum to use if the string cannot be parsed:

public static T ToEnum<T>(this string value, T defaultValue) 
{
    if (string.IsNullOrEmpty(value))
    {
        return defaultValue;
    }

    T result;
    return Enum.TryParse<T>(value, true, out result) ? result : defaultValue;
}

Which makes this the call:

StatusEnum MyStatus = "Active".ToEnum(StatusEnum.None);

However, I would be careful adding an extension method like this to string as (without namespace control) it will appear on all instances of string whether they hold an enum or not (so 1234.ToString().ToEnum(StatusEnum.None) would be valid but nonsensical) . It's often be best to avoid cluttering Microsoft's core classes with extra methods that only apply in very specific contexts unless your entire development team has a very good understanding of what those extensions do.

This worked for me:

HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority) + HttpRuntime.AppDomainAppVirtualPath + "ImageName";

We use ClosedXML in rather large systems.

• Free
• Easy to install
• Straight forward coding
• Very responsive support
• Developer team is extremly open to new suggestions. Often new features and bug fixes are implemented within the same week

As far as I know there's no way to change the client's resolution just using VNC, as it is just a "monitor mirroring" application.

TightVNC however (which is a VNC client and server application) can resize the screen on the client side, i.e. making everything a little smaller (similar to image resizing techniques in graphics programs). That should work if you don't use too small font sizes. VNC should theoretically be compatible between different VNC applications.

Since this is a popular question, I will point out that java can also validate against "referred to" xsd's, for instance if the .xml file itself specifies XSD's in the header, using xsi:schemaLocation or xsi:noNamespaceSchemaLocation (or xsi for particular namespaces) ex:

<document xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:noNamespaceSchemaLocation="http://www.example.com/document.xsd">
  ...

or schemaLocation (always a list of namespace to xsd mappings)

<document xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.example.com/my_namespace http://www.example.com/document.xsd">
  ...

The other answers work here as well, because the .xsd files "map" to the namespaces declared in the .xml file, because they declare a namespace, and if matches up with the namespace in the .xml file, you're good. But sometimes it's convenient to be able to have a custom resolver...

From the javadocs: "If you create a schema without specifying a URL, file, or source, then the Java language creates one that looks in the document being validated to find the schema it should use. For example:"

SchemaFactory factory = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");
Schema schema = factory.newSchema();

and this works for multiple namespaces, etc. The problem with this approach is that the xmlsns:xsi is probably a network location, so it'll by default go out and hit the network with each and every validation, not always optimal.

Here's an example that validates an XML file against any XSD's it references (even if it has to pull them from the network):

  public static void verifyValidatesInternalXsd(String filename) throws Exception {
    InputStream xmlStream = new new FileInputStream(filename);
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setValidating(true);
    factory.setNamespaceAware(true);
    factory.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage",
                 "http://www.w3.org/2001/XMLSchema");
    DocumentBuilder builder = factory.newDocumentBuilder();
    builder.setErrorHandler(new RaiseOnErrorHandler());
    builder.parse(new InputSource(xmlStream));
    xmlStream.close();
  }

  public static class RaiseOnErrorHandler implements ErrorHandler {
    public void warning(SAXParseException e) throws SAXException {
      throw new RuntimeException(e);
    }
    public void error(SAXParseException e) throws SAXException {
      throw new RuntimeException(e);
    }
    public void fatalError(SAXParseException e) throws SAXException {
      throw new RuntimeException(e);
    }
  }

You can avoid pulling referenced XSD's from the network, even though the xml files reference url's, by specifying the xsd manually (see some other answers here) or by using an "XML catalog" style resolver. Spring apparently also can intercept the URL requests to serve local files for validations. Or you can set your own via setResourceResolver, ex:

Source xmlFile = new StreamSource(xmlFileLocation);
SchemaFactory schemaFactory = SchemaFactory
                                .newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = schemaFactory.newSchema();
Validator validator = schema.newValidator();
validator.setResourceResolver(new LSResourceResolver() {
  @Override
  public LSInput resolveResource(String type, String namespaceURI,
                                 String publicId, String systemId, String baseURI) {
    InputSource is = new InputSource(
                           getClass().getResourceAsStream(
                          "some_local_file_in_the_jar.xsd"));
                          // or lookup by URI, etc...
    return new Input(is); // for class Input see 
                          // https://stackoverflow.com/a/2342859/32453
  }
});
validator.validate(xmlFile);

See also here for another tutorial.

I believe the default is to use DOM parsing, you can do something similar with SAX parser that is validating as well saxReader.setEntityResolver(your_resolver_here);

If you right-click on your "Computer" (or "My Computer") icon and select "Manage" from the pop-up menu, that'll take you to the Computer Management console.

In there, under System Tools\Shared Folders, you'll find "Open Files". This is probably close to what you want, but if the file is on a network share then you'd need to do the same thing on the server on which the file lives.

final for instance variables:

Really useful for multi-threading code and it makes it a lot easier to argue about the instance state and correctness. Haven't seen it a lot in industry context and often not thought in java classes.

static {something;}:

Used to initialize static members (also I prefer a static method to do it (because it has a name). Not thought.

Found a good post on this and thought I'd share. Check it out HERE

Basically.

You can create the following class and IComparer Classes

public class Widget {
    public string Name = string.Empty;
    public int Size = 0;

    public Widget(string name, int size) {
    this.Name = name;
    this.Size = size;
}
}

public class WidgetNameSorter : IComparer<Widget> {
    public int Compare(Widget x, Widget y) {
        return x.Name.CompareTo(y.Name);
}
}

public class WidgetSizeSorter : IComparer<Widget> {
    public int Compare(Widget x, Widget y) {
    return x.Size.CompareTo(y.Size);
}
}

Then If you have an IList, you can sort it like this.

List<Widget> widgets = new List<Widget>();
widgets.Add(new Widget("Zeta", 6));
widgets.Add(new Widget("Beta", 3));
widgets.Add(new Widget("Alpha", 9));

widgets.Sort(new WidgetNameSorter());
widgets.Sort(new WidgetSizeSorter());

But Checkout this site for more information... Check it out HERE

You could use a Bat to Exe converter from here:

http://www.f2ko.de/en/b2e.php

This will convert your batch file to an executable, then you can set the icon for the converted file.

For me it's Enterprise Architect from Sparx Systems. A very rounded UML tool for a very reasonable price.

Very strong feature list including: integrated project management, baselining, export/import (including export to html), documentation generation from the model, various templates (Zachman, TOGAF, etc.), IDE plugins, code generation (with IDE plugins available for Visual Studio, Eclipse & others), automation API - the list goes on.

Oh yeah, don't forget support for source control directly from inside the tool (SVN, CVS, TFS & SCC).

I would also stay away from Visio - you only get diagrams, not a model. Rename a class in one place in a UML modelling tool and you rename in all places. This is not the case in Visio!

A nice abstraction on top of Jsch is Apache commons-vfs which offers a virtual filesystem API that makes accessing and writing SFTP files almost transparent. Worked well for us.

According to gurus, I define LINQ as motorcycle and SP as car. If you want to go for a short trip and only have small passengers(in this case 2), go gracefully with LINQ. But if you want to go for a journey and have large band, i think you should choose SP.

As a conclusion, choosing between motorcycle or car is depend on your route (business), length (time), and passengers (data).

Hope it helps, I may be wrong. :D

If you want it to be used on many platforms, you could as commented use defines like:

#if defined(_MSC_VER) || defined(WIN32)  || defined(_WIN32) || defined(__WIN32__) \
                        || defined(WIN64)    || defined(_WIN64) || defined(__WIN64__) 

        errno_t err = fopen_s(&stream,name, "w");

#endif

#if defined(unix)        || defined(__unix)      || defined(__unix__) \
                        || defined(linux)       || defined(__linux)     || defined(__linux__) \
                        || defined(sun)         || defined(__sun) \
                        || defined(BSD)         || defined(__OpenBSD__) || defined(__NetBSD__) \
                        || defined(__FreeBSD__) || defined __DragonFly__ \
                        || defined(sgi)         || defined(__sgi) \
                        || defined(__MACOSX__)  || defined(__APPLE__) \
                        || defined(__CYGWIN__) 

        stream = fopen(name, "w");

#endif

You should probably use a JavaScript library to do things like this.

For example, MochiKit has a function removeElement, and jQuery has remove.

NOT a solution, rather a TEMPORARY solution which only works only for the current editor and current session:

Simply right click on the place where the line-numbers should be, and there you'll see a small menu.

then, mark the "Show Line Numbers" option.

Please note that this only works on a per-file basis, however. Enjoy.

Personally I use PDO, but I think that is mainly a question of preference.

PDO has some features that help agains SQL injection (prepared statements), but if you are careful with your SQL you can achieve that with mysqli, too.

Moving to another database is not so much a reason to use PDO. As long as you don't use "special SQL features", you can switch from one DB to another. However as soon as you use for example "SELECT ... LIMIT 1" you can't go to MS-SQL where it is "SELECT TOP 1 ...". So this is problematic anyway.

Well, for starters, a struct is passed by value rather than by reference. Structs are good for relatively simple data structures, while classes have a lot more flexibility from an architectural point of view via polymorphism and inheritance.

Others can probably give you more detail than I, but I use structs when the structure that I am going for is simple.

I am very familiar with Mercurial's locking code (as of 1.9.1). The above advice is good, but I'd add that:

1. I've seen this in the wild, but rarely, and only on Windows machines.
2. Deleting lock files is the easiest fix, BUT you have to make sure nothing else is accessing the repository. (If the lock is a string of zeros, this is almost certainly true).

(For the curious: I haven't yet been able to catch the cause of this problem, but suspect it's either an older version of Mercurial accessing the repository or a problem in Python's socket.gethostname() call on certain versions of Windows.)

You can use Regular Expressions to determine if $foo is a number (or not).

Take a look here: How do I determine whether a scalar is a number

inih is a simple ini parser written in C, it comes with a C++ wrapper too. Example usage:

#include "INIReader.h"    

INIReader reader("test.ini");

std::cout << "version="
          << reader.GetInteger("protocol", "version", -1) << ", name="
          << reader.Get("user", "name", "UNKNOWN") << ", active="
          << reader.GetBoolean("user", "active", true) << "\n";

The author has also a list of existing libraries here.

I've created an open source (BSD) C header that deals with this problem. It currently supports POSIX and Windows. Please check it out:

https://github.com/cxong/tinydir

tinydir_dir dir;
tinydir_open(&dir, "/path/to/dir");

while (dir.has_next)
{
    tinydir_file file;
    tinydir_readfile(&dir, &file);

    printf("%s", file.name);
    if (file.is_dir)
    {
        printf("/");
    }
    printf("\n");

    tinydir_next(&dir);
}

tinydir_close(&dir);

Look, there's no easy way to do this. I'm working on a project that is inherently multithreaded. Events come in from the operating system and I have to process them concurrently.

The simplest way to deal with testing complex, multithreaded application code is this: If it's too complex to test, you're doing it wrong. If you have a single instance that has multiple threads acting upon it, and you can't test situations where these threads step all over each other, then your design needs to be redone. It's both as simple and as complex as this.

There are many ways to program for multithreading that avoids threads running through instances at the same time. The simplest is to make all your objects immutable. Of course, that's not usually possible. So you have to identify those places in your design where threads interact with the same instance and reduce the number of those places. By doing this, you isolate a few classes where multithreading actually occurs, reducing the overall complexity of testing your system.

But you have to realize that even by doing this, you still can't test every situation where two threads step on each other. To do that, you'd have to run two threads concurrently in the same test, then control exactly what lines they are executing at any given moment. The best you can do is simulate this situation. But this might require you to code specifically for testing, and that's at best a half step towards a true solution.

Probably the best way to test code for threading issues is through static analysis of the code. If your threaded code doesn't follow a finite set of thread safe patterns, then you might have a problem. I believe Code Analysis in VS does contain some knowledge of threading, but probably not much.

Look, as things stand currently (and probably will stand for a good time to come), the best way to test multithreaded apps is to reduce the complexity of threaded code as much as possible. Minimize areas where threads interact, test as best as possible, and use code analysis to identify danger areas.

Modify your constructor to the following so that it calls the base class constructor properly:

public class MyExceptionClass : Exception
{
    public MyExceptionClass(string message, string extrainfo) : base(message)
    {
        //other stuff here
    }
}

Note that a constructor is not something that you can call anytime within a method. That's the reason you're getting errors in your call in the constructor body.

^{_{Note: there is no guarantee this code will work in future versions of the .Net framework. Using private .Net framework internals as done here through reflection is probably not good overall. Use the interop solution mentioned at the bottom, as the Windows API is less likely to change.}}

If you are looking for a Folder picker that looks more like the Windows 7 dialog, with the ability to copy and paste from a textbox at the bottom and the navigation pane on the left with favorites and common locations, then you can get access to that in a very lightweight way.

The FolderBrowserDialog UI is very minimal:

But you can have this instead:

Here's a class that opens a Vista-style folder picker using the .Net private IFileDialog interface, without directly using interop in the code (.Net takes care of that for you). It falls back to the pre-Vista dialog if not in a high enough Windows version. Should work in Windows 7, 8, 9, 10 and higher (theoretically).

using System;
using System.Reflection;
using System.Windows.Forms;

namespace MyCoolCompany.Shuriken {
    /// <summary>
    /// Present the Windows Vista-style open file dialog to select a folder. Fall back for older Windows Versions
    /// </summary>
    public class FolderSelectDialog {
        private string _initialDirectory;
        private string _title;
        private string _fileName = "";

        public string InitialDirectory {
            get { return string.IsNullOrEmpty(_initialDirectory) ? Environment.CurrentDirectory : _initialDirectory; }
            set { _initialDirectory = value; }
        }
        public string Title {
            get { return _title ?? "Select a folder"; }
            set { _title = value; }
        }
        public string FileName { get { return _fileName; } }

        public bool Show() { return Show(IntPtr.Zero); }

        /// <param name="hWndOwner">Handle of the control or window to be the parent of the file dialog</param>
        /// <returns>true if the user clicks OK</returns>
        public bool Show(IntPtr hWndOwner) {
            var result = Environment.OSVersion.Version.Major >= 6
                ? VistaDialog.Show(hWndOwner, InitialDirectory, Title)
                : ShowXpDialog(hWndOwner, InitialDirectory, Title);
            _fileName = result.FileName;
            return result.Result;
        }

        private struct ShowDialogResult {
            public bool Result { get; set; }
            public string FileName { get; set; }
        }

        private static ShowDialogResult ShowXpDialog(IntPtr ownerHandle, string initialDirectory, string title) {
            var folderBrowserDialog = new FolderBrowserDialog {
                Description = title,
                SelectedPath = initialDirectory,
                ShowNewFolderButton = false
            };
            var dialogResult = new ShowDialogResult();
            if (folderBrowserDialog.ShowDialog(new WindowWrapper(ownerHandle)) == DialogResult.OK) {
                dialogResult.Result = true;
                dialogResult.FileName = folderBrowserDialog.SelectedPath;
            }
            return dialogResult;
        }

        private static class VistaDialog {
            private const string c_foldersFilter = "Folders|\n";

            private const BindingFlags c_flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
            private readonly static Assembly s_windowsFormsAssembly = typeof(FileDialog).Assembly;
            private readonly static Type s_iFileDialogType = s_windowsFormsAssembly.GetType("System.Windows.Forms.FileDialogNative+IFileDialog");
            private readonly static MethodInfo s_createVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("CreateVistaDialog", c_flags);
            private readonly static MethodInfo s_onBeforeVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("OnBeforeVistaDialog", c_flags);
            private readonly static MethodInfo s_getOptionsMethodInfo = typeof(FileDialog).GetMethod("GetOptions", c_flags);
            private readonly static MethodInfo s_setOptionsMethodInfo = s_iFileDialogType.GetMethod("SetOptions", c_flags);
            private readonly static uint s_fosPickFoldersBitFlag = (uint) s_windowsFormsAssembly
                .GetType("System.Windows.Forms.FileDialogNative+FOS")
                .GetField("FOS_PICKFOLDERS")
                .GetValue(null);
            private readonly static ConstructorInfo s_vistaDialogEventsConstructorInfo = s_windowsFormsAssembly
                .GetType("System.Windows.Forms.FileDialog+VistaDialogEvents")
                .GetConstructor(c_flags, null, new[] { typeof(FileDialog) }, null);
            private readonly static MethodInfo s_adviseMethodInfo = s_iFileDialogType.GetMethod("Advise");
            private readonly static MethodInfo s_unAdviseMethodInfo = s_iFileDialogType.GetMethod("Unadvise");
            private readonly static MethodInfo s_showMethodInfo = s_iFileDialogType.GetMethod("Show");

            public static ShowDialogResult Show(IntPtr ownerHandle, string initialDirectory, string title) {
                var openFileDialog = new OpenFileDialog {
                    AddExtension = false,
                    CheckFileExists = false,
                    DereferenceLinks = true,
                    Filter = c_foldersFilter,
                    InitialDirectory = initialDirectory,
                    Multiselect = false,
                    Title = title
                };

                var iFileDialog = s_createVistaDialogMethodInfo.Invoke(openFileDialog, new object[] { });
                s_onBeforeVistaDialogMethodInfo.Invoke(openFileDialog, new[] { iFileDialog });
                s_setOptionsMethodInfo.Invoke(iFileDialog, new object[] { (uint) s_getOptionsMethodInfo.Invoke(openFileDialog, new object[] { }) | s_fosPickFoldersBitFlag });
                var adviseParametersWithOutputConnectionToken = new[] { s_vistaDialogEventsConstructorInfo.Invoke(new object[] { openFileDialog }), 0U };
                s_adviseMethodInfo.Invoke(iFileDialog, adviseParametersWithOutputConnectionToken);

                try {
                    int retVal = (int) s_showMethodInfo.Invoke(iFileDialog, new object[] { ownerHandle });
                    return new ShowDialogResult {
                        Result = retVal == 0,
                        FileName = openFileDialog.FileName
                    };
                }
                finally {
                    s_unAdviseMethodInfo.Invoke(iFileDialog, new[] { adviseParametersWithOutputConnectionToken[1] });
                }
            }
        }

        // Wrap an IWin32Window around an IntPtr
        private class WindowWrapper : IWin32Window {
            private readonly IntPtr _handle;
            public WindowWrapper(IntPtr handle) { _handle = handle; }
            public IntPtr Handle { get { return _handle; } }
        }
    }
}

I developed this as a cleaned up version of .NET Win 7-style folder select dialog by Bill Seddon of lyquidity.com (I have no affiliation). I wrote my own because his solution requires an additional Reflection class that isn't needed for this focused purpose, uses exception-based flow control, doesn't cache the results of its reflection calls. Note that the nested static VistaDialog class is so that its static reflection variables don't try to get populated if the Show method is never called.

It is used like so in a Windows Form:

var dialog = new FolderSelectDialog {
    InitialDirectory = musicFolderTextBox.Text,
    Title = "Select a folder to import music from"
};
if (dialog.Show(Handle)) {
    musicFolderTextBox.Text = dialog.FileName;
}

You can of course play around with its options and what properties it exposes. For example, it allows multiselect in the Vista-style dialog.

Also, please note that Simon Mourier gave an answer that shows how to do the exact same job using interop against the Windows API directly, though his version would have to be supplemented to use the older style dialog if in an older version of Windows. Unfortunately, I hadn't found his post yet when I worked up my solution. Name your poison!

Doing this without using Boost can be done by getting the C string pointer with c_str() and using strcasecmp:

std::string str1 ="aBcD";
std::string str2 = "AbCd";;
if (strcasecmp(str1.c_str(), str2.c_str()) == 0)
{
    //case insensitive equal 
}

In MS SQL Server Management Studio on the object explorer, right click on the database. In the context menu that follows select 'Tasks -> Take Offline'

Thanks for the pointers.

I don't know, whether this is the best approach to the problem or not, but here is how I got it to work. I referenced the Microsoft XML, v2.6 dll in my VBA, and then the following code snippet, gives me the required values

Dim objXML As MSXML2.DOMDocument

Set objXML = New MSXML2.DOMDocument

If Not objXML.loadXML(strXML) Then  'strXML is the string with XML'
    Err.Raise objXML.parseError.ErrorCode, , objXML.parseError.reason
End If
 
Dim point As IXMLDOMNode
Set point = objXML.firstChild

Debug.Print point.selectSingleNode("X").Text
Debug.Print point.selectSingleNode("Y").Text

To switch to Automatic:

Application.Calculation = xlCalculationAutomatic    

To switch to Manual:

Application.Calculation = xlCalculationManual    

I would go with Ryan's answer if you really want to do this.

In general on a *nix environment, you always want to err on giving away as little permissions as possible.

9 times out of 10, 755 is the ideal permission for this - as the only user with the ability to modify the files will be the webserver. Change this to 775 with your ftp user in a group if you REALLY need to change this.

Since you're new to php by your own admission, here's a helpful link for improving the security of your upload service: move_uploaded_file

Nope... just use a DL:

dl { overflow:hidden; }
dt {
 float:left;
 clear: left;
 width:4em; /* adjust the width; make sure the total of both is 100% */
 text-align: right
}
dd {
 float:left;
 width:50%; /* adjust the width; make sure the total of both is 100% */
 margin: 0 0.5em;
}

Most likely, the classes for the DataSet, DataTable and DataRow are already defined in the solution. If that's the case you won't need the DataSetExtensions reference.

Ex. DataSet class name-> CustomSet, DataRow class name-> CustomTableRow (with defined columns: RowNo, ...)

var result = from myRow in myDataTable.Rows.OfType<CustomSet.CustomTableRow>()
             where myRow.RowNo == 1
             select myRow;

Or (as I prefer)

var result = myDataTable.Rows.OfType<CustomSet.CustomTableRow>().Where(myRow => myRow.RowNo);

Add the MessageUI.Framework and use the following code

#import <MessageUI/MessageUI.h> 

And then:

if ([MFMessageComposeViewController canSendText]) {
  MFMessageComposeViewController *messageComposer =
  [[MFMessageComposeViewController alloc] init];
  NSString *message = @"Your Message here";
  [messageComposer setBody:message];
  messageComposer.messageComposeDelegate = self;
  [self presentViewController:messageComposer animated:YES completion:nil];
}

and the delegate method -

- (void)messageComposeViewController:(MFMessageComposeViewController *)controller
             didFinishWithResult:(MessageComposeResult)result {
      [self dismissViewControllerAnimated:YES completion:nil];
 }

Something like this?

SELECT  *
FROM    table1
WHERE   convert(varchar, column_datetime, 111) = '2008/08/14'

Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope Process

The above command worked for me even when the following error happens:

Access to the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell' is denied.

Everything in MySQL seems to be done closer to the metal than in MSSQL, And the documentation treats it that way. Especially for optimization, you'll need to understand how indexes, system configuration, and the optimizer interact under various circumstances.

The "optimizer" is more a parser. In MSSQL your query plan is often a surprise (usually good, sometimes not). In MySQL, it pretty much does what you asked it to do, the way you expected it to. Which means you yourself need to have a deep understanding of the various ways it might be done.

Not built around a good TRANSACTION model (default MyISAM engine).

File-system setup is your problem.

All the database configuration is your problem - especially various cache sizes.

Sometimes it seems best to think of it as an ad-hoc, glorified isam. Codd and Date don't carry much weight here. They would say it with no embarrassment.

WordPad!

I'm happy using Vim, but since I'm trying to introduce Git to the company I wanted something that we'd all have, and found that WordPad seems to work okay (i.e. Git does wait until you're finished editing and close the window).

git config core.editor '"C:\Program Files\Windows NT\Accessories\wordpad.exe"'

That's using Git Bash on msysgit; I've not tried from the Windows command prompt (if that makes any difference).

For Windows: Filemon from SysInternals will show you what files are being accessed.

Remember to set your filters so you are not overwhelmed by the chatty file system traffic.

Added: Filemon does not work with newer Windows versions, so you might have to use Process Monitor.

Hexadecimal to decimal. Don't run it on online compilers, because it won't work.

#include<stdio.h>
void main()
{
    unsigned int i;
    scanf("%x",&i);
    printf("%d",i);
}

//slightly improved code without using collection framework

package com.test;

public class TestClass {

    private static Link last;
    private static Link first;

    public static void main(String[] args) {

        //Inserting
        for(int i=0;i<5;i++){
            Link.insert(i+5);
        }
        Link.printList();

        //Deleting
        Link.deletefromFirst();
        Link.printList();
    }


    protected  static class Link {
        private int data;
        private Link nextlink;

        public Link(int d1) {
            this.data = d1;
        }

        public static void insert(int d1) {
            Link a = new Link(d1);
            a.nextlink = null;
            if (first != null) {
                last.nextlink = a;
                last = a;
            } else {
                first = a;
                last = a;
            }
            System.out.println("Inserted -:"+d1);
        }

        public static void deletefromFirst() {
            if(null!=first)
            {
                System.out.println("Deleting -:"+first.data);
                first = first.nextlink;
            }
            else{
                System.out.println("No elements in Linked List");
            }
        }

        public static void printList() {
            System.out.println("Elements in the list are");
            System.out.println("-------------------------");
            Link temp = first;
            while (temp != null) {
                System.out.println(temp.data);
                temp = temp.nextlink;
            }
        }
    }
}

If you needed to sort it, then you could implement a sort that also removes duplicates.

Kills two birds with one stone, then.

I am gonna explain with a simple example code which takes a compare function as parameter to another sorting function. Lets say I have a bubble sort function that takes a custom compare function and uses it instead of a fixed if statement.

Compare Function

bool compare(int a, int b) {
    return a > b;
}

Now , the Bubble sort that takes another function as its parameter to perform comparison

Bubble sort function

void bubble_sort(int arr[], int n, bool (&cmp)(int a, int b)) {

    for (int i = 0;i < n - 1;i++) {
        for (int j = 0;j < (n - 1 - i);j++) {
            
            if (cmp(arr[j], arr[j + 1])) {
                swap(arr[j], arr[j + 1]);
            }
        }
    }
}

Finally , the main which calls the Bubble sort function by passing the boolean compare function as argument.

int main()
{
    int i, n = 10, key = 11;
    int arr[10] = { 20, 22, 18, 8, 12, 3, 6, 12, 11, 15 };

    bubble_sort(arr, n, compare);
    cout<<"Sorted Order"<<endl;
    for (int i = 0;i < n;i++) {
        cout << arr[i] << " ";
    }
}

Output:

Sorted Order
3 6 8 11 12 12 15 18 20 22

If you're looking for a way of applying the "static" keyword to a class, like you can in C# for example, then you won't be able to without using Managed C++.

But the looks of your sample, you just need to create a public static method on your BitParser object. Like so:

BitParser.h

class BitParser
{
 public:
  static bool getBitAt(int buffer, int bitIndex);

  // ...lots of great stuff

 private:
  // Disallow creating an instance of this object
  BitParser() {}
};

BitParser.cpp

bool BitParser::getBitAt(int buffer, int bitIndex)
{
  bool isBitSet = false;
  // .. determine if bit is set
  return isBitSet;
}

You can use this code to call the method in the same way as your example code.

Hope that helps! Cheers.

You must note however that the Array.filter is not supported in all browser so, you must to prototyped:

//This prototype is provided by the Mozilla foundation and
//is distributed under the MIT license.
//http://www.ibiblio.org/pub/Linux/LICENSES/mit.license

if (!Array.prototype.filter)
{
    Array.prototype.filter = function(fun /*, thisp*/)
    {
        var len = this.length;

        if (typeof fun != "function")
            throw new TypeError();

        var res = new Array();
        var thisp = arguments[1];

        for (var i = 0; i < len; i++)
        {
            if (i in this)
            {
                var val = this[i]; // in case fun mutates this

                if (fun.call(thisp, val, i, this))
                   res.push(val);
            }
        }

        return res;
    };
}

And doing so, you can prototype any method you may need.

Select * is a SQL antipattern. It should not be used in production code for many reasons including:

It takes a tiny bit longer to process. When things are run millions of times, those tiny bits can matter. A slow database where the slowness is caused by this type of sloppy coding throughout is the hardest kind to performance tune.

It means you are probably sending more data than you need which causes both server and network bottlenecks. If you have an inner join, the chances of sending more data than you need are 100%.

It causes maintenance problems especially when you have added new columns that you do not want seen everywhere. Further if you have a new column, you may need to do something to the interface to determine what to do with that column.

It can break views (I know this is true in SQl server, it may or may not be true in mysql).

If someone is silly enough to rebuild the tables with the columns in a differnt order (which you shouldn't do but it happens all teh time), all sorts of code can break. Espcially code for an insert for example where suddenly you are putting the city into the address_3 field becasue without specifying, the database can only go on the order of the columns. This is bad enough when the data types change but worse when the swapped columns have the same datatype becasue you can go for sometime inserting bad data that is a mess to clean up. You need to care about data integrity.

If it is used in an insert, it will break the insert if a new column is added in one table but not the other.

It might break triggers. Trigger problems can be difficult to diagnose.

Add up all this against the time it take to add in the column names (heck you may even have an interface that allows you to drag over the columns names (I know I do in SQL Server, I'd bet there is some way to do this is some tool you use to write mysql queries.) Let's see, "I can cause maintenance problems, I can cause performance problems and I can cause data integrity problems, but hey I saved five minutes of dev time." Really just put in the specific columns you want.

I also suggest you read this book: http://www.amazon.com/SQL-Antipatterns-Programming-Pragmatic-Programmers-ebook/dp/B00A376BB2/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1389896688&sr=1-1&keywords=sql+antipatterns

grep astring myfile -A 5 -B 5

That will grep "myfile" for "astring", and show 5 lines before and after each match

Programmers moving from C/C++ may miss this one:

In C#, % (modulus operator) works on floats!

If you can move to SQL Server 2008, you can take advantage of the FILESTREAM support which gives you the best of both - the files are stored in the filesystem, but the database integration is much better than just storing a filepath in a varchar field. Your query can return a standard .NET file stream, which makes the integration a lot simpler.

Getting Started with FILESTREAM Storage

It can depend on exactly what you want to do in addition to reading the metadata. If it is just simply the bitrate / name etc. that you need, and nothing else, something lightweight is probably best.

If you're manipulating the mp3 past that PyMedia may be suitable.

There are quite a few, whatever you do get, make sure and test it out on plenty of sample media. There are a few different versions of ID3 tags in particular, so make sure it's not too out of date.

Personally I've used this small MP3Info class with luck. It is quite old though.

http://www.omniscia.org/~vivake/python/MP3Info.py

There is an actual Data Type called KeyValuePair, use like this

KeyValuePair<string, string> myKeyValuePair = new KeyValuePair<string,string>("defaultkey", "defaultvalue");

Use LXML. LXML uses the full power of libxml2 and libxslt, but wraps them in more "Pythonic" bindings than the Python bindings that are native to those libraries. As such, it gets the full XPath 1.0 implementation. Native ElemenTree supports a limited subset of XPath, although it may be good enough for your needs.

If your database is straightforward and simple, LINQ to SQL will do. If you need logical/abstracted entities on top of your tables, then go for Entity Framework.

I used lobos answer and it works. But I had a problem with the conversion of doubles because of the culture settings. So I added

return (T)Convert.ChangeType(base.Value, typeof(T), CultureInfo.InvariantCulture);

public void Enable_Usercontrol1()
{
    UserControl1 usercontrol1 = new UserControl1();
    usercontrol1.Enabled = true;
} 
/*
    Put this Anywhere in your Form and Call it by Enable_Usercontrol1();
    Also, Make sure the Usercontrol1 Modifiers is Set to Protected Internal
*/

In extension to the accepted answer, in C#7 the enum flags can be written using binary literals:

[Flags]
public enum MyColors
{
    None   = 0b0000,
    Yellow = 0b0001,
    Green  = 0b0010,
    Red    = 0b0100,
    Blue   = 0b1000
}

I think this representation makes it clear how the flags work under the covers.

A pure CSS solution (#content { min-height: 100%; }) will work in a lot of cases, but not in all of them - especially IE6 and IE7.

Unfortunately, you will need to resort to a JavaScript solution in order to get the desired behavior. This can be done by calculating the desired height for your content <div> and setting it as a CSS property in a function:

function resizeContent() {
  var contentDiv = document.getElementById('content');
  var headerDiv = document.getElementById('header');
  // This may need to be done differently on IE than FF, but you get the idea.
  var viewPortHeight = window.innerHeight - headerDiv.clientHeight;
  contentDiv.style.height = 
    Math.max(viewportHeight, contentDiv.clientHeight) + 'px';
}

You can then set this function as a handler for onLoad and onResize events:

<body onload="resizeContent()" onresize="resizeContent()">
  . . .
</body>

EXISTS will tell you whether a query returned any results. e.g.:

SELECT * 
FROM Orders o 
WHERE EXISTS (
    SELECT * 
    FROM Products p 
    WHERE p.ProductNumber = o.ProductNumber)

IN is used to compare one value to several, and can use literal values, like this:

SELECT * 
FROM Orders 
WHERE ProductNumber IN (1, 10, 100)

You can also use query results with the IN clause, like this:

SELECT * 
FROM Orders 
WHERE ProductNumber IN (
    SELECT ProductNumber 
    FROM Products 
    WHERE ProductInventoryQuantity > 0)

From Efficiency versus intent by Andrew Koenig :

First, it is far from obvious that ++i is more efficient than i++, at least where integer variables are concerned.

And :

So the question one should be asking is not which of these two operations is faster, it is which of these two operations expresses more accurately what you are trying to accomplish. I submit that if you are not using the value of the expression, there is never a reason to use i++ instead of ++i, because there is never a reason to copy the value of a variable, increment the variable, and then throw the copy away.

So, if the resulting value is not used, I would use ++i. But not because it is more efficient: because it correctly states my intent.

I had the same problem and it works you just have to declare the i outside of the loop:

int i;

for(i = low; i <= high; ++i)

{
        res = runalg(i);
        if (res > highestres)
        {
                highestres = res;
        }

}

++i increments the value, then returns it.

i++ returns the value, and then increments it.

It's a subtle difference.

For a for loop, use ++i, as it's slightly faster. i++ will create an extra copy that just gets thrown away.

delay function:

/**
 * delay or pause for some time
 * @param {number} t - time (ms)
 * @return {Promise<*>}
 */
const delay = async t => new Promise(resolve => setTimeout(resolve, t));

usage inside async function:

await delay(1000);

Here is a clean, clear JavaScript function. It will escape text such as "a few < many" into "a few &lt; many".

function escapeHtmlEntities (str) {
  if (typeof jQuery !== 'undefined') {
    // Create an empty div to use as a container,
    // then put the raw text in and get the HTML
    // equivalent out.
    return jQuery('<div/>').text(str).html();
  }

  // No jQuery, so use string replace.
  return str
    .replace(/&/g, '&amp;')
    .replace(/>/g, '&gt;')
    .replace(/</g, '&lt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&apos;');
}

Ganymede's version of WTP includes a revamped Javascript editor that's worth a try. The key version numbers are Eclipse 3.4 and WTP 3.0. See http://live.eclipse.org/node/569

Abstraction

Abstraction is an act of representing essentail details without including the background details. A abstract class have only method signatures and implementing class can have its own implementation, in this way the complex details will be hidden from the user. Abstraction focuses on the outside view. In otherwords, Abstraction is sepration of interfaces from the actual implementation.

Encapsulation

Encapsulation explains binding the data members and methods into a single unit. Information hiding is the main purpose of encapsulation. Encapsulation is acheived by using access specifiers like private, public, protected. Class member variables are made private so that they cann't be accessible directly to outside world. Encapsulation focuses on the inner view. In otherwords, Encapsulation is a technique used to protect the information in an object from the other object.

The semantics of C# differs slightly from Java here. In C# assignment in declaration is performed before calling the superclass constructor. In Java it is done immediately after which allows 'this' to be used (particularly useful for anonymous inner classes), and means that the semantics of the two forms really do match.

If you can, make the fields final.

Well, for your sample and any with a limited number of unique columns, this should do it.

select 
    distinct a,
    (select distinct t2.b  from t t2  where t1.a=t2.a and t2.b='VIEW'),
    (select distinct t2.b from t t2  where t1.a=t2.a and t2.b='EDIT')
from t t1

For CMake based projects i use Jetbrains CLion

For Autotools based projects the already mentioned Qtcreator.

For everything else: VIM + YouCompleteMe

It is indeed much less simple than it seems :-) Nick's suggestion is a good one.

To get started, keep in mind that any worthwhile comparison method will essentially work by converting the images into a different form -- a form which makes it easier to pick similar features out. Usually, this stuff doesn't make for very light reading ...


One of the simplest examples I can think of is simply using the color space of each image. If two images have highly similar color distributions, then you can be reasonably sure that they show the same thing. At least, you can have enough certainty to flag it, or do more testing. Comparing images in color space will also resist things such as rotation, scaling, and some cropping. It won't, of course, resist heavy modification of the image or heavy recoloring (and even a simple hue shift will be somewhat tricky).

http://en.wikipedia.org/wiki/RGB_color_space
http://upvector.com/index.php?section=tutorials&subsection=tutorials/colorspace

Another example involves something called the Hough Transform. This transform essentially decomposes an image into a set of lines. You can then take some of the 'strongest' lines in each image and see if they line up. You can do some extra work to try and compensate for rotation and scaling too -- and in this case, since comparing a few lines is MUCH less computational work than doing the same to entire images -- it won't be so bad.

http://homepages.inf.ed.ac.uk/amos/hough.html
http://rkb.home.cern.ch/rkb/AN16pp/node122.html
http://en.wikipedia.org/wiki/Hough_transform

Here what's technet has to say about iisreset

You might need to restart Internet Information Services (IIS) before certain configuration changes take effect or when applications become unavailable. Restarting IIS is the same as first stopping IIS, and then starting it again, except it is accomplished with a single command.

For a set that small is generally not worth it to convert from an Array to a HashMap/set. In fact, you're probably best off keeping them in an array and then sorting them by key and iterating over both lists simultaneously to do the comparison.