I wrote some classes for parsing HTML tags in C#. They are nice and simple if they meet your particular needs.
You can read an article about them and download the source code at http://www.blackbeltcoder.com/Articles/strings/parsing-html-tags-in-c.
There's also an article about a generic parsing helper class at http://www.blackbeltcoder.com/Articles/strings/a-text-parsing-helper-class.
' = "
/ = \ = \\
example :
f = open('c:\word.txt', 'r')
f = open("c:\word.txt", "r")
f = open("c:/word.txt", "r")
f = open("c:\\\word.txt", "r")
Results are the same
=>> no, they're not the same.
A single backslash will escape characters. You just happen to luck out in that example because \k and \w aren't valid escapes like \t or \n or \\ or \"
If you want to use single backslashes (and have them interpreted as such), then you need to use a "raw" string. You can do this by putting an 'r' in front of the string
im_raw = r'c:\temp.txt'
non_raw = 'c:\\temp.txt'
another_way = 'c:/temp.txt'
As far as paths in Windows are concerned, forward slashes are interpreted the same way. Clearly the string itself is different though. I wouldn't guarantee that they're handled this way on an external device though.
when to use const or readonly
const
readonly
App.config, but once it initializes it can't be changedI think the V$SQLAREA table contains what you're looking for (see columns SQL_TEXT and SQL_FULLTEXT).
Use a good XSD Schema to create a set of classes with xsd.exe and use an XmlSerializer to create a object tree out of your XML and vice versa. If you have few restrictions on your model, you could even try to create a direct mapping between you model classes and the XML with the Xml*Attributes.
There is an introductory article about XML Serialisation on MSDN.
Performance tip: Constructing an XmlSerializer is expensive. Keep a reference to your XmlSerializer instance if you intend to parse/write multiple XML files.
This quote is taken from; Version Control with Git
Git runs garbage collection automatically:
• If there are too many loose objects in the repository
• When a push to a remote repository happens
• After some commands that might introduce many loose objects
• When some commands such as git reflog expire explicitly request it
And finally, garbage collection occurs when you explicitly request it using the git gc command. But when should that be? There’s no solid answer to this question, but there is some good advice and best practice.
You should consider running git gc manually in a few situations:
• If you have just completed a git filter-branch . Recall that filter-branch rewrites many commits, introduces new ones, and leaves the old ones on a ref that should be removed when you are satisfied with the results. All those dead objects (that are no longer referenced since you just removed the one ref pointing to them) should be removed via garbage collection.
• After some commands that might introduce many loose objects. This might be a large rebase effort, for example.
And on the flip side, when should you be wary of garbage collection?
• If there are orphaned refs that you might want to recover
• In the context of git rerere and you do not need to save the resolutions forever
• In the context of only tags and branches being sufficient to cause Git to retain a commit permanently
• In the context of FETCH_HEAD retrievals (URL-direct retrievals via git fetch ) because they are immediately subject to garbage collection
I was creating an application having a canvas over a pdf, that involved a lot of resizes of canvas like Zooming the pdf-in and out, and in turn on every zoom-in/out of PDF I had to resize the canvas to adapt the size of the pdf, I went through lot of answers in stackOverflow, and didn't found a perfect solution that will eventually solve the problem.
I was using rxjs and angular 6, and didn't found any answer specific to the newest version.
Here is the entire code snippet that would be helpful, to anyone leveraging rxjs to draw on top of canvas.
private captureEvents(canvasEl: HTMLCanvasElement) {
this.drawingSubscription = fromEvent(canvasEl, 'mousedown')
.pipe(
switchMap((e: any) => {
return fromEvent(canvasEl, 'mousemove')
.pipe(
takeUntil(fromEvent(canvasEl, 'mouseup').do((event: WheelEvent) => {
const prevPos = {
x: null,
y: null
};
})),
takeUntil(fromEvent(canvasEl, 'mouseleave')),
pairwise()
)
})
)
.subscribe((res: [MouseEvent, MouseEvent]) => {
const rect = this.cx.canvas.getBoundingClientRect();
const prevPos = {
x: Math.floor( ( res[0].clientX - rect.left ) / ( rect.right - rect.left ) * this.cx.canvas.width ),
y: Math.floor( ( res[0].clientY - rect.top ) / ( rect.bottom - rect.top ) * this.cx.canvas.height )
};
const currentPos = {
x: Math.floor( ( res[1].clientX - rect.left ) / ( rect.right - rect.left ) * this.cx.canvas.width ),
y: Math.floor( ( res[1].clientY - rect.top ) / ( rect.bottom - rect.top ) * this.cx.canvas.height )
};
this.coordinatesArray[this.file.current_slide - 1].push(prevPos);
this.drawOnCanvas(prevPos, currentPos);
});
}
And here is the snippet that fixes, mouse coordinates relative to size of the canvas, irrespective of how you zoom-in/out the canvas.
const prevPos = {
x: Math.floor( ( res[0].clientX - rect.left ) / ( rect.right - rect.left ) * this.cx.canvas.width ),
y: Math.floor( ( res[0].clientY - rect.top ) / ( rect.bottom - rect.top ) * this.cx.canvas.height )
};
const currentPos = {
x: Math.floor( ( res[1].clientX - rect.left ) / ( rect.right - rect.left ) * this.cx.canvas.width ),
y: Math.floor( ( res[1].clientY - rect.top ) / ( rect.bottom - rect.top ) * this.cx.canvas.height )
};
Sadly even with the likes of CSS 3 we still do not have the likes of :first-word :last-word etc using pure CSS. Thankfully there's almost a JavaScript nowadays for everything which brings me to my recommendation. Using nthEverything and jQuery you can expand from the traditional Pseudo elements.
Currently the valid Pseudos are:
:first-child:first-of-type:only-child:last-child:last-of-type:only-of-type:nth-child:nth-of-type:nth-last-child:nth-last-of-typeAnd using nth Everything we can expand this to:
::first-letter::first-line::first-word::last-letter::last-line::last-word::nth-letter::nth-line::nth-word::nth-last-letter::nth-last-line::nth-last-wordClass({
Namespace:ABC,
Name:"ClassL2",
Bases:[ABC.ClassTop],
Private:{
m_var:2
},
Protected:{
proval:2,
fight:Property(function(){
this.m_var--;
console.log("ClassL2::fight (m_var)" +this.m_var);
},[Property.Type.Virtual])
},
Public:{
Fight:function(){
console.log("ClassL2::Fight (m_var)"+this.m_var);
this.fight();
}
}
});
I've found http://railstutorial.org/book to be a great resource for learning Rails
Try trigger on logon
Insted of trying disconnect users you should not allow them to connect.
There is and example of such trigger.
CREATE OR REPLACE TRIGGER rds_logon_trigger
AFTER LOGON ON DATABASE
BEGIN
IF SYS_CONTEXT('USERENV','IP_ADDRESS') not in ('192.168.2.121','192.168.2.123','192.168.2.233') THEN
RAISE_APPLICATION_ERROR(-20003,'You are not allowed to connect to the database');
END IF;
IF (to_number(to_char(sysdate,'HH24'))< 6) and (to_number(to_char(sysdate,'HH24')) >18) THEN
RAISE_APPLICATION_ERROR(-20005,'Logon only allowed during business hours');
END IF;
END;
Insert a Timer: timer1, 2 buttons: button1, button2, 1 textBox: textBox1, and a comboBox: comboBox1. Make sure you declare:
int count = 0;
Source Code:
private void button1_Click(object sender, EventArgs e)
{
// This clears the textBox, resets the count, and starts the timer
count = 0;
textBox1.Clear();
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
// This generates the password, and types it in the textBox
count += 1;
string possible = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
string psw = "";
Random rnd = new Random { };
psw += possible[rnd.Next(possible.Length)];
textBox1.Text += psw;
if (count == (comboBox1.SelectedIndex + 1))
{
timer1.Stop();
}
}
private void Form1_Load(object sender, EventArgs e)
{
// This adds password lengths to the comboBox to choose from.
comboBox1.Items.Add("1");
comboBox1.Items.Add("2");
comboBox1.Items.Add("3");
comboBox1.Items.Add("4");
comboBox1.Items.Add("5");
comboBox1.Items.Add("6");
comboBox1.Items.Add("7");
comboBox1.Items.Add("8");
comboBox1.Items.Add("9");
comboBox1.Items.Add("10");
comboBox1.Items.Add("11");
comboBox1.Items.Add("12");
}
private void button2_click(object sender, EventArgs e)
{
// This encrypts the password
tochar = textBox1.Text;
textBox1.Clear();
char[] carray = tochar.ToCharArray();
for (int i = 0; i < carray.Length; i++)
{
int num = Convert.ToInt32(carray[i]) + 10;
string cvrt = Convert.ToChar(num).ToString();
textBox1.Text += cvrt;
}
}
The previously mentioned wmic command is the way to go, as it is installed by default in recent versions of Windows.
Here is my small improvement to generalize it, by retrieving the current name from the environment:
wmic computersystem where name="%COMPUTERNAME%"
call rename name="NEW-NAME"
NOTE: The command must be given in one line, but I've broken it into two to make scrolling unnecessary. As @rbeede mentions you'll have to reboot to complete the update.
This is the code I use for that:
ArrayList copy = new ArrayList (original.size());
Collections.copy(copy, original);
Hope is usefull for you
Guido has written The Inside Story on New-Style Classes, a really great article about new-style and old-style class in Python.
Python 3 has only new-style class. Even if you write an 'old-style class', it is implicitly derived from object.
New-style classes have some advanced features lacking in old-style classes, such as super, the new C3 mro, some magical methods, etc.
echo "test" | mailx -r [email protected] -s 'test' [email protected]
It works in OpenBSD.
This might be useful for apps with a bundled JRE: I scan for the folder name that i'm running the application from: so if you're application is executing from:
C:\Dev\build\SomeJavaApp\jre-9.0.1\bin\javaw.exe
then you can find if it's already running in J9, by:
public static void main(String[] args) {
AtomicBoolean isRunning = new AtomicBoolean(false);
ProcessHandle.allProcesses()
.filter(ph -> ph.info().command().isPresent() && ph.info().command().get().contains("SomeJavaApp"))
.forEach((process) -> {
isRunning.set(true);
});
if (isRunning.get()) System.out.println("SomeJavaApp is running already");
}
As every one says, the only real difference is the default access. But I particularly use struct when I don't want any sort of encapsulation with a simple data class, even if I implement some helper methods. For instance, when I need something like this:
struct myvec {
int x;
int y;
int z;
int length() {return x+y+z;}
};
I recommend the accepted answer above. If you are in a pinch, however, you could declare the object as a global within the page_properties function.
$objPage = new PageAtrributes;
function page_properties() {
global $objPage;
$objPage->set_page_title($myrow['title']);
}
Try this. I've use the Large Object Binary (LOB) format for storing generated PDF documents, some of which were 10+ MB in size, in a database and it worked wonderfully.
The problem with your query is that when using a GROUP BY clause (which you essentially do by using distinct) you can only use columns that you group by or aggregate functions. You cannot use the column id because there are potentially different values. In your case there is always only one value because of the HAVING clause, but most RDBMS are not smart enough to recognize that.
This should work however (and doesn't need a join):
UPDATE sales
SET status='ACTIVE'
WHERE id IN (
SELECT MIN(id) FROM sales
GROUP BY saleprice, saledate
HAVING COUNT(id) = 1
)
You could also use MAX or AVG instead of MIN, it is only important to use a function that returns the value of the column if there is only one matching row.
You might want to consider NULL values as well. In your example, if the column notes has a null value, then the resulting value will be NULL. If you want the null values to behave as empty strings (so that the answer comes out 'SomeText'), then use the IsNull function:
Select IsNull(Cast(notes as nvarchar(4000)),'') + 'SomeText' From NotesTable a
It took me a couple of minutes to find a site that I could source for this.
The card is valid until the last day of the month indicated, after the last [sic]1 day of the next month; the card cannot be used to make a purchase if the merchant attempts to obtain an authorization. - Source
Also, while looking this up, I found an interesting article on Microsoft's website using an example like this, exec summary: Access 2000 for a month/year defaults to the first day of the month, here's how to override that to calculate the end of the month like you'd want for a credit card.
Additionally, this page has everything you ever wanted to know about credit cards.
Removing Language="c#" in global.asax file resolved the issue for me.
A solution using regex_token_iterators:
#include <iostream>
#include <regex>
#include <string>
using namespace std;
int main()
{
string str("The quick brown fox");
regex reg("\\s+");
sregex_token_iterator iter(str.begin(), str.end(), reg, -1);
sregex_token_iterator end;
vector<string> vec(iter, end);
for (auto a : vec)
{
cout << a << endl;
}
}
I hope this will help somebody, I solved the problem like this
There was a problem because the database was not open. Command startup opens the database.
This you can solve with command alter database open
in some case with alter database open resetlogs
$ sqlplus / sysdba
SQL> startup
ORACLE instance started.
Total System Global Area 1073741824 bytes
Fixed Size 8628936 bytes
Variable Size 624952632 bytes
Database Buffers 436207616 bytes
Redo Buffers 3952640 bytes
Database mounted.
Database opened.
SQL> conn user/pass123
Connected.
To add to the args list:
:argadd
To delete from the args list:
:argdelete
In your example, you could use :argedit test.pl to add test.pl to the args list and edit the file in one step.
:help args gives much more detail and advanced usage
The sound of the french fou, (like: amour fou) [crazy] written in english, would be foo, wouldn't it. Else furchtbar -> foobar -> foo, bar -> barfoo -> barfuß (barefoot). Just fou. A foot without teeth.
I agree with all, who mentioned it means: nothing interesting, just something, usually needed to complete a statement/expression.
git log --cherry-mark --oneline from_branch...to_branch
(3dots) but sometimes it shows '+' instead of '='
Here's what I came up with, using a bit of lookahead and named groups. This is of course just IPv6, but it shouldn't interfere with additional patterns if you want to add IPv4:
(?=([0-9a-f]+(:[0-9a-f])*)?(?P<wild>::)(?!([0-9a-f]+:)*:))(::)?([0-9a-f]{1,4}:{1,2}){0,6}(?(wild)[0-9a-f]{0,4}|[0-9a-f]{1,4}:[0-9a-f]{1,4})
It could be because of couple of Browser settings. Try with these options checked..
Tools > Internet Options > Advanced > Enable Integrated Windows Authentication (works with Integrated Windows Authentication set on IIS)
Tools > Internet Options> Security > Local Intranet > Custom Level > Automatic Logon
Worst case, try adding localhost to the Trusted sites.
If you are in a network, you can also try debugging by getting a network trace. Could be because of some proxy trying to authenticate.
SQLAlchemy is very, very powerful. However it is not thread safe make sure you keep that in mind when working with cherrypy in thread-pool mode.
If you want to break your line because of a long literal string, you can break that string into pieces:
long_string = "a very long string"
print("a very long string")
will be replaced by
long_string = (
"a "
"very "
"long "
"string"
)
print(
"a "
"very "
"long "
"string"
)
Output for both print statements:
a very long string
Notice the parenthesis in the affectation.
Notice also that breaking literal strings into pieces allows to use the literal prefix only on parts of the string and mix the delimiters:
s = (
'''2+2='''
f"{2+2}"
)
Not knowing the actual details, my guess is that it makes an attempt to join like you might join relative URIs. For example:
urljoin('/some/abs/path', '../other') = '/some/abs/other'
This means that when you join a path with a preceding slash, you are actually joining one base to another, in which case the second gets precedence.
public static void WriteLine(this List<int> theList)
{
foreach (int i in list)
{
Console.Write("{0}\t", t.ToString());
}
Console.WriteLine();
}
Then, later...
list.WriteLine();
They are useful if you are (for some reason) using column names with certain characters for example.
Select First Name From People
would not work, but putting square brackets around the column name would work
Select [First Name] From People
In short, it's a way of explicitly declaring a object name; column, table, database, user or server.
You are correct, the default is my name asc. The only way I have found to change the sort order it to create a datatable from the FileInfo collection.
You can then used the DefaultView from the datatable and sort the directory with the .Sort method.
This is quite involve and fairly slow but I'm hoping someone will post a better solution.
AppDomain.CurrentDomain.BaseDirectory
works with MbUnit GUI.
I'm fairly sure the primary monitor is the default. If the app was coded decently, when it's closed, it'll remember where it was last at and will reopen there, but -- as you've noticed -- it isn't a default behavior.
EDIT: The way I usually do it is to have the location stored in the app's settings. On load, if there is no value for them, it defaults to the center of the screen. On closing of the form, it records its position. That way, whenever it opens, it's where it was last. I don't know of a simple way to tell it to launch onto the second monitor the first time automatically, however.
-- Kevin Fairchild
If it's almost impossible to rule out modifications of the files, have you considered ignoring them? If this statement is right and you wouldn't touch those files during your development, this command may be useful:
git update-index --assume-unchanged file_to_ignore
I used pychart and thought it was very straightforward.
It's all native python and does not have a busload of dependencies. I'm sure matplotlib is lovely but I'd be downloading and installing for days and I just want one measley bar chart!
It doesn't seem to have been updated in a few years but hey it works!
For JSONObject the below code can help you.
`JSONObject.toString().getBytes("UTF-8").length`
returns size in bytes
I checked it with my JSONArray object by writing it to a file. It is giving object size.
Use socat for this:
For example:
socat PTY,link=/dev/ttyS10 PTY,link=/dev/ttyS11
Perl:
sub is_palindrome($)
{
$s = lc(shift); # ignore case
$s =~ s/\W+//g; # consider only letters, digits, and '_'
$s eq reverse $s;
}
It ignores case and strips non-alphanumeric characters (it locale- and unicode- neutral).
SELECT is_read_committed_snapshot_on FROM sys.databases
WHERE name= 'YourDatabase'
Return value:
READ_COMMITTED_SNAPSHOT option is ON. Read operations under the READ COMMITTED isolation level are based on snapshot scans and do not acquire locks.READ_COMMITTED_SNAPSHOT option is OFF. Read operations under the READ COMMITTED isolation level use Shared (S) locks.Assuming you have access to STL:
std::string filename("filename.conf");
std::string::size_type idx;
idx = filename.rfind('.');
if(idx != std::string::npos)
{
std::string extension = filename.substr(idx+1);
}
else
{
// No extension found
}
Edit: This is a cross platform solution since you didn't mention the platform. If you're specifically on Windows, you'll want to leverage the Windows specific functions mentioned by others in the thread.
def fruitBag = ["orange","banana","coconut"]
def fruit = fruitBag.collect{item -> item.contains('n')}
I did it like this so it works if someone is looking for it.
I found Green plugin very simple to use and to generate class diagram from source code. Give it a try :). Just copy the plugin to your plugin dir.
I hade this error when transfering a csv to mssql I converted the columns to DT_NTEXT and some columns on mssql where set to nvarchar(255).
setting them to nvarchar(max) resolved it.
Summary:
Update for Python 3.4+ pathlib that actually answers the question:
from pathlib import Path
relative = Path("mydir/myfile.txt")
absolute = relative.absolute() # absolute is a Path object
If you only need a temporary string, keep in mind that you can use Path objects with all the relevant functions in os.path, including of course abspath:
from os.path import abspath
absolute = abspath(relative) # absolute is a str object
Jezus, all this programming for just an index restart... Perhaps I'm an idiot, but for pre-oracle 12 (which has a restart feature), what is wrong with a simpel:
drop sequence blah;
create sequence blah
?
if you work on linux OS ,there is a command line file --mimetype:
String mimetype(file){
//1. run cmd
Object cmd=Runtime.getRuntime().exec("file --mime-type "+file);
//2 get output of cmd , then
//3. parse mimetype
if(output){return output.split(":")[1].trim(); }
return "";
}
Then
mimetype("/home/nyapp.war") // 'application/zip'
mimetype("/var/www/ggg/au.mp3") // 'audio/mp3'
Here is the Reg ex that matches all valid dates including leap years. Formats accepted mm/dd/yyyy or mm-dd-yyyy or mm.dd.yyyy format
^(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[1,3-9]|1[0-2])(\/|-|\.)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:0?2(\/|-|\.)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:(?:0?[1-9])|(?:1[0-2]))(\/|-|\.)(?:0?[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$
courtesy Asiq Ahamed
list.sort(function(item1, item2){
return +(item1.attr > item2.attr) || +(item1.attr === item2.attr) - 1;
})
How they work samples:
+('aaa'>'bbb')||+('aaa'==='bbb')-1
+(false)||+(false)-1
0||0-1
-1
+('bbb'>'aaa')||+('bbb'==='aaa')-1
+(true)||+(false)-1
1||0-1
1
+('aaa'>'aaa')||+('aaa'==='aaa')-1
+(false)||+(true)-1
0||1-1
0
My command is
forfiles -p "d:\logs" -s -m*.log -d-15 -c"cmd /c del @PATH\@FILE"
@PATH - is just path in my case, so I had to use @PATH\@FILE
also forfiles /? not working for me too, but forfiles (without "?") worked fine.
And the only question I have: how to add multiple mask (for example ".log|.bak")?
All this regarding forfiles.exe that I downloaded here (on win XP)
But if you are using Windows server forfiles.exe should be already there and it is differs from ftp version. That is why I should modify command.
For Windows Server 2003 I'm using this command:
forfiles -p "d:\Backup" -s -m *.log -d -15 -c "cmd /c del @PATH"
The PostgreSQL manual indicates that this means the transaction is open (inside BEGIN) and idle. It's most likely a user connected using the monitor who is thinking or typing. I have plenty of those on my system, too.
If you're using Slony for replication, however, the Slony-I FAQ suggests idle in transaction may mean that the network connection was terminated abruptly. Check out the discussion in that FAQ for more details.
Indeed, thanks to the comments to my post here, it looks like sparse directories are the way to go. I believe the following should do it:
svn checkout --depth empty http://svnserver/trunk/proj
svn update --set-depth infinity proj/foo
svn update --set-depth infinity proj/bar
svn update --set-depth infinity proj/baz
Alternatively, --depth immediates instead of empty checks out files and directories in trunk/proj without their contents. That way you can see which directories exist in the repository.
As mentioned in @zigdon's answer, you can also do a non-recursive checkout. This is an older and less flexible way to achieve a similar effect:
svn checkout --non-recursive http://svnserver/trunk/proj
svn update trunk/foo
svn update trunk/bar
svn update trunk/baz
Also be careful with double-quotes -- on the Unix shell this expands variables. Some are obvious (like $foo and \t) but some are not (like !foo).
For safety, use single-quotes!
Conversion from signed to unsigned does not necessarily just copy or reinterpret the representation of the signed value. Quoting the C standard (C99 6.3.1.3):
When a value with integer type is converted to another integer type other than _Bool, if the value can be represented by the new type, it is unchanged.
Otherwise, if the new type is unsigned, the value is converted by repeatedly adding or subtracting one more than the maximum value that can be represented in the new type until the value is in the range of the new type.
Otherwise, the new type is signed and the value cannot be represented in it; either the result is implementation-defined or an implementation-defined signal is raised.
For the two's complement representation that's nearly universal these days, the rules do correspond to reinterpreting the bits. But for other representations (sign-and-magnitude or ones' complement), the C implementation must still arrange for the same result, which means that the conversion can't just copy the bits. For example, (unsigned)-1 == UINT_MAX, regardless of the representation.
In general, conversions in C are defined to operate on values, not on representations.
To answer the original question:
unsigned int u = 1234;
int i = -5678;
unsigned int result = u + i;
The value of i is converted to unsigned int, yielding UINT_MAX + 1 - 5678. This value is then added to the unsigned value 1234, yielding UINT_MAX + 1 - 4444.
(Unlike unsigned overflow, signed overflow invokes undefined behavior. Wraparound is common, but is not guaranteed by the C standard -- and compiler optimizations can wreak havoc on code that makes unwarranted assumptions.)
public static void formatDouble(double myDouble){
NumberFormat numberFormatter = new DecimalFormat("##.000");
String result = numberFormatter.format(myDouble);
System.out.println(result);
}
For instance, if the double value passed into the formatDouble() method is 345.9372, the following will be the result: 345.937 Similarly, if the value .7697 is passed to the method, the following will be the result: .770
Since Python 3 is fairly mainstream, I wanted to include a pathlib answer, as I believe that it is probably now a better tool for accessing file and path information.
from pathlib import Path
current_file: Path = Path(__file__).resolve()
If you are seeking the directory of the current file, it is as easy as adding .parent to the Path() statement:
current_path: Path = Path(__file__).parent.resolve()
pushd . > /dev/null
SCRIPT_PATH="${BASH_SOURCE[0]}"
if ([ -h "${SCRIPT_PATH}" ]); then
while([ -h "${SCRIPT_PATH}" ]); do cd `dirname "$SCRIPT_PATH"`;
SCRIPT_PATH=`readlink "${SCRIPT_PATH}"`; done
fi
cd `dirname ${SCRIPT_PATH}` > /dev/null
SCRIPT_PATH=`pwd`;
popd > /dev/null
It works for all versions, including
source" aka . (dot) operator.$0 is modified from caller."./script""/full/path/to/script""/some/path/../../another/path/script""./some/folder/script"Alternatively, if the Bash script itself is a relative symlink you want to follow it and return the full path of the linked-to script:
pushd . > /dev/null
SCRIPT_PATH="${BASH_SOURCE[0]}";
if ([ -h "${SCRIPT_PATH}" ]) then
while([ -h "${SCRIPT_PATH}" ]) do cd `dirname "$SCRIPT_PATH"`; SCRIPT_PATH=`readlink "${SCRIPT_PATH}"`; done
fi
cd `dirname ${SCRIPT_PATH}` > /dev/null
SCRIPT_PATH=`pwd`;
popd > /dev/null
SCRIPT_PATH is given in full path, no matter how it is called.
Just make sure you locate this at start of the script.
Actually, you should use several tools to get a bulletproof approach:
DIR_PATH=`readlink -f "${the_stuff_you_test}"` # Get rid of symlinks and get abs path
if [[ -d "${DIR_PATH}" ]] ; Then # Now you're testing
echo "It's a dir";
fi
There isn't any need to worry about spaces and special characters as long as you use "${}".
Note that [[]] is not as portable as [], but since most people work with modern versions of Bash (since after all, most people don't even work with command line :-p), the benefit is greater than the trouble.
What I usually do for small collections is to create kind of parser/converter method like this
def convertSetToList(setName):
return list(setName)
Then I can use the new list and access by index number
userFields = convertSetToList(user)
name = request.json[userFields[0]]
As a list you will have all the other methods that you may need to work with
There is an even easier way that does not involve writing anything in the code behind: Just add this line to your javascript:
if(<%=(Not Page.IsPostBack).ToString().ToLower()%>){//Your JavaScript goodies here}
or
if(<%=(Page.IsPostBack).ToString().ToLower()%>){//Your JavaScript goodies here}
Any functions into which you pass string literals "I am a string literal" should use char const * as the type instead of char*.
If you're going to fix something, fix it right.
Explanation:
You can not use string literals to initialise strings that will be modified, because they are of type const char*. Casting away the constness to later modify them is undefined behaviour, so you have to copy your const char* strings char by char into dynamically allocated char* strings in order to modify them.
Example:
#include <iostream>
void print(char* ch);
void print(const char* ch) {
std::cout<<ch;
}
int main() {
print("Hello");
return 0;
}
I would NEVER use chars. I’ve had this debate with many people and they always bring up the tired cliché that char is faster. Well I say, how much faster? What are we talking about here, milliseconds, seconds and if so how many? You’re telling me because someone claims its a few milliseconds faster, we should introduce tons of hard to fix bugs into the system?
So here are some issues you will run into:
Every field will be padded, so you end up with code forever that has RTRIMS everywhere. This is also a huge disk space waste for the longer fields.
Now let’s say you have the quintessential example of a char field of just one character but the field is optional. If somebody passes an empty string to that field it becomes one space. So when another application/process queries it, they get one single space, if they don’t use rtrim. We’ve had xml documents, files and other programs, display just one space, in optional fields and break things.
So now you have to ensure that you’re passing nulls and not empty string, to the char field. But that’s NOT the correct use of null. Here is the use of null. Lets say you get a file from a vendor
Name|Gender|City
Bob||Los Angeles
If gender is not specified than you enter Bob, empty string and Los Angeles into the table. Now lets say you get the file and its format changes and gender is no longer included but was in the past.
Name|City
Bob|Seattle
Well now since gender is not included, I would use null. Varchars support this without issues.
Char on the other hand is different. You always have to send null. If you ever send empty string, you will end up with a field that has spaces in it.
I could go on and on with all the bugs I’ve had to fix from chars and in about 20 years of development.
The KB article linked in Joe's post is great for determining which service packs have been installed for any version. Along those same lines, this KB article maps version numbers to specific hotfixes and cumulative updates, but it only applies to SQL05 SP2 and up.
Only related with currency trading (Forex), but many Forex brokers are offering MetaTrader which let you code in MQL. The main problem with it (aside that it's limited to Forex) is that you've to code in MQL which might not be your preferred language.
You can use margin auto. With flex, the div seems to be centered vertically too.
body,
html {
height: 100%;
margin: 0;
}
.site {
height: 100%;
display: flex;
}
.site .box {
background: #0ff;
max-width: 20vw;
margin: auto;
}
<div class="site">
<div class="box">
<h1>blabla</h1>
<p>blabla</p>
<p>blablabla</p>
<p>lbibdfvkdlvfdks</p>
</div>
</div>
In case where multiple columns identify unique row (e.g relations table ) there you can use following
Use row id e.g. emp_dept(empid, deptid, startdate, enddate) suppose empid and deptid are unique and identify row in that case
select oed.empid, count(oed.empid)
from emp_dept oed
where exists ( select *
from emp_dept ied
where oed.rowid <> ied.rowid and
ied.empid = oed.empid and
ied.deptid = oed.deptid )
group by oed.empid having count(oed.empid) > 1 order by count(oed.empid);
and if such table has primary key then use primary key instead of rowid, e.g id is pk then
select oed.empid, count(oed.empid)
from emp_dept oed
where exists ( select *
from emp_dept ied
where oed.id <> ied.id and
ied.empid = oed.empid and
ied.deptid = oed.deptid )
group by oed.empid having count(oed.empid) > 1 order by count(oed.empid);
Just to have it noted as an option: if the arrays you are working with are of a primitive type – Boolean (bool), Char, SByte, Byte, Int16 (short), UInt16, Int32 (int), UInt32, Int64 (long), UInt64, IntPtr, UIntPtr, Single, or Double – then you could (or should?) try using Buffer.BlockCopy. According to the MSDN page for the Buffer class:
This class provides better performance for manipulating primitive types than similar methods in the System.Array class.
Using the C# 2.0 example from @OwenP's answer as a starting point, it would work as follows:
int[] front = { 1, 2, 3, 4 };
int[] back = { 5, 6, 7, 8 };
int[] combined = new int[front.Length + back.Length];
Buffer.BlockCopy(front, 0, combined, 0, front.Length);
Buffer.BlockCopy(back, 0, combined, front.Length, back.Length);
There is barely any difference in syntax between Buffer.BlockCopy and the Array.Copy that @OwenP used, but this should be faster (even if only slightly).
Right click on an .aspx file and click "Browse with..." then select Chrome and click "Set as Default." You can select more than one browser in the list if you want.
There's also this really great WoVS Default Browser Switcher Visual Studio extension.
.csv files.Open up .xlsx file in Excel.
Press option+F11
Insert ? Module
Insert this into the module code:
Public Sub SaveWorksheetsAsCsv()
Dim WS As Excel.Worksheet
Dim SaveToDirectory As String
SaveToDirectory = "./"
For Each WS In ThisWorkbook.Worksheets
WS.SaveAs SaveToDirectory & WS.Name & ".csv", xlCSV
Next
End Sub
Find your .csv files in ~/Library/Containers/com.microsoft.Excel/Data.
open ~/Library/Containers/com.microsoft.Excel/Data
Close .xlsx file.
Rinse and repeat for other .xlsx files.
Simply change 'Search String' to whatever you seek and 'Replace String' with whatever you want to replace it with.
--Getting all the databases and making a cursor
DECLARE db_cursor CURSOR FOR
SELECT name
FROM master.dbo.sysdatabases
WHERE name NOT IN ('master','model','msdb','tempdb') -- exclude these databases
DECLARE @databaseName nvarchar(1000)
--opening the cursor to move over the databases in this instance
OPEN db_cursor
FETCH NEXT FROM db_cursor INTO @databaseName
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT @databaseName
--Setting up temp table for the results of our search
DECLARE @Results TABLE(TableName nvarchar(370), RealColumnName nvarchar(370), ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @SearchStr nvarchar(100), @ReplaceStr nvarchar(100), @SearchStr2 nvarchar(110)
SET @SearchStr = 'Search String'
SET @ReplaceStr = 'Replace String'
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128)
SET @TableName = ''
--Looping over all the tables in the database
WHILE @TableName IS NOT NULL
BEGIN
DECLARE @SQL nvarchar(2000)
SET @ColumnName = ''
DECLARE @result NVARCHAR(256)
SET @SQL = 'USE ' + @databaseName + '
SELECT @result = MIN(QUOTENAME(TABLE_SCHEMA) + ''.'' + QUOTENAME(TABLE_NAME))
FROM [' + @databaseName + '].INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = ''BASE TABLE'' AND TABLE_CATALOG = ''' + @databaseName + '''
AND QUOTENAME(TABLE_SCHEMA) + ''.'' + QUOTENAME(TABLE_NAME) > ''' + @TableName + '''
AND OBJECTPROPERTY(
OBJECT_ID(
QUOTENAME(TABLE_SCHEMA) + ''.'' + QUOTENAME(TABLE_NAME)
), ''IsMSShipped''
) = 0'
EXEC master..sp_executesql @SQL, N'@result nvarchar(256) out', @result out
SET @TableName = @result
PRINT @TableName
WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
BEGIN
DECLARE @ColumnResult NVARCHAR(256)
SET @SQL = '
SELECT @ColumnResult = MIN(QUOTENAME(COLUMN_NAME))
FROM [' + @databaseName + '].INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(''[' + @databaseName + '].' + @TableName + ''', 2)
AND TABLE_NAME = PARSENAME(''[' + @databaseName + '].' + @TableName + ''', 1)
AND DATA_TYPE IN (''char'', ''varchar'', ''nchar'', ''nvarchar'')
AND TABLE_CATALOG = ''' + @databaseName + '''
AND QUOTENAME(COLUMN_NAME) > ''' + @ColumnName + ''''
PRINT @SQL
EXEC master..sp_executesql @SQL, N'@ColumnResult nvarchar(256) out', @ColumnResult out
SET @ColumnName = @ColumnResult
PRINT @ColumnName
IF @ColumnName IS NOT NULL
BEGIN
INSERT INTO @Results
EXEC
(
'USE ' + @databaseName + '
SELECT ''' + @TableName + ''',''' + @ColumnName + ''',''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630)
FROM ' + @TableName + ' (NOLOCK) ' +
' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2
)
END
END
END
--Declaring another temporary table
DECLARE @time_to_update TABLE(TableName nvarchar(370), RealColumnName nvarchar(370))
INSERT INTO @time_to_update
SELECT TableName, RealColumnName FROM @Results GROUP BY TableName, RealColumnName
DECLARE @MyCursor CURSOR;
BEGIN
DECLARE @t nvarchar(370)
DECLARE @c nvarchar(370)
--Looping over the search results
SET @MyCursor = CURSOR FOR
SELECT TableName, RealColumnName FROM @time_to_update GROUP BY TableName, RealColumnName
--Getting my variables from the first item
OPEN @MyCursor
FETCH NEXT FROM @MyCursor
INTO @t, @c
WHILE @@FETCH_STATUS = 0
BEGIN
-- Updating the old values with the new value
DECLARE @sqlCommand varchar(1000)
SET @sqlCommand = '
USE ' + @databaseName + '
UPDATE [' + @databaseName + '].' + @t + ' SET ' + @c + ' = REPLACE(' + @c + ', ''' + @SearchStr + ''', ''' + @ReplaceStr + ''')
WHERE ' + @c + ' LIKE ''' + @SearchStr2 + ''''
PRINT @sqlCommand
BEGIN TRY
EXEC (@sqlCommand)
END TRY
BEGIN CATCH
PRINT ERROR_MESSAGE()
END CATCH
--Getting next row values
FETCH NEXT FROM @MyCursor
INTO @t, @c
END;
CLOSE @MyCursor ;
DEALLOCATE @MyCursor;
END;
DELETE FROM @time_to_update
DELETE FROM @Results
FETCH NEXT FROM db_cursor INTO @databaseName
END
CLOSE db_cursor
DEALLOCATE db_cursor
Note: this isn't ideal, nor is it optimized
Code example of ItemListener implementation
class ItemChangeListener implements ItemListener{
@Override
public void itemStateChanged(ItemEvent event) {
if (event.getStateChange() == ItemEvent.SELECTED) {
Object item = event.getItem();
// do something with object
}
}
}
Now we will get only selected item.
Then just add listener to your JComboBox
addItemListener(new ItemChangeListener());
you can use altsoft xml2pdf lib for this
watch only breaks on write, rwatch let you break on read, and awatch let you break on read/write.
You can set read watchpoints on memory locations:
gdb$ rwatch *0xfeedface
Hardware read watchpoint 2: *0xfeedface
but one limitation applies to the rwatch and awatch commands; you can't use gdb variables in expressions:
gdb$ rwatch $ebx+0xec1a04f
Expression cannot be implemented with read/access watchpoint.
So you have to expand them yourself:
gdb$ print $ebx
$13 = 0x135700
gdb$ rwatch *0x135700+0xec1a04f
Hardware read watchpoint 3: *0x135700 + 0xec1a04f
gdb$ c
Hardware read watchpoint 3: *0x135700 + 0xec1a04f
Value = 0xec34daf
0x9527d6e7 in objc_msgSend ()
Edit: Oh, and by the way. You need either hardware or software support. Software is obviously much slower. To find out if your OS supports hardware watchpoints you can see the can-use-hw-watchpoints environment setting.
gdb$ show can-use-hw-watchpoints
Debugger's willingness to use watchpoint hardware is 1.
If you want to copy files and see a "progress" I suggest the script below in Batch that I used from another script as a base
I used a progress bar and a percentage while the script copies the game files Nuclear throne:
@echo off
title NTU Installer
setlocal EnableDelayedExpansion
@echo Iniciando instalacao...
if not exist "C:\NTU" (
md "C:\NTU
)
if not exist "C:\NTU\Profile" (
md "C:\NTU\Profile"
)
ping -n 5 localhost >nul
for %%f in (*.*) do set/a vb+=1
set "barra="
::loop da barra
for /l %%i in (1,1,70) do set "barra=!barra!Û"
rem barra vaiza para ser preenchida
set "resto="
rem loop da barra vazia
for /l %%i in (1,1,110) do set "resto=!resto!"
set i=0
rem carregameno de arquivos
for %%f in (*.*) do (
>>"log_ntu.css" (
copy "%%f" "C:\NTU">nul
echo Copiado:%%f
)
cls
set /a i+=1,percent=i*100/vb,barlen=70*percent/100
for %%a in (!barlen!) do echo !percent!%% /
[!barra:~0,%%a!%resto%]
echo Instalado:[%%f] / Complete:[!percent!%%/100%]
ping localhost -n 1.9 >nul
)
xcopy /e "Profile" "C:\NTU\Profile">"log_profile.css"
@echo Criando atalho na area de trabalho...
copy "NTU.lnk" "C:\Users\%username%\Desktop">nul
ping localhost -n 4 >nul
@echo Arquivos instalados!
pause
Copy folder recursively without recursion to avoid stack overflow.
public static void CopyDirectory(string source, string target)
{
var stack = new Stack<Folders>();
stack.Push(new Folders(source, target));
while (stack.Count > 0)
{
var folders = stack.Pop();
Directory.CreateDirectory(folders.Target);
foreach (var file in Directory.GetFiles(folders.Source, "*.*"))
{
File.Copy(file, Path.Combine(folders.Target, Path.GetFileName(file)));
}
foreach (var folder in Directory.GetDirectories(folders.Source))
{
stack.Push(new Folders(folder, Path.Combine(folders.Target, Path.GetFileName(folder))));
}
}
}
public class Folders
{
public string Source { get; private set; }
public string Target { get; private set; }
public Folders(string source, string target)
{
Source = source;
Target = target;
}
}
My favorite way to do this is with a ValueConverter so that the ItemsSource and SelectedValue both bind to the same property. This requires no additional properties to keep your ViewModel nice and clean.
<ComboBox ItemsSource="{Binding Path=ExampleProperty, Converter={x:EnumToCollectionConverter}, Mode=OneTime}"
SelectedValuePath="Value"
DisplayMemberPath="Description"
SelectedValue="{Binding Path=ExampleProperty}" />
And the definition of the Converter:
public static class EnumHelper
{
public static string Description(this Enum e)
{
return (e.GetType()
.GetField(e.ToString())
.GetCustomAttributes(typeof(DescriptionAttribute), false)
.FirstOrDefault() as DescriptionAttribute)?.Description ?? e.ToString();
}
}
[ValueConversion(typeof(Enum), typeof(IEnumerable<ValueDescription>))]
public class EnumToCollectionConverter : MarkupExtension, IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return Enum.GetValues(value.GetType())
.Cast<Enum>()
.Select(e => new ValueDescription() { Value = e, Description = e.Description()})
.ToList();
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return null;
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
return this;
}
}
This converter will work with any enum. ValueDescription is just a simple class with a Value property and a Description property. You could just as easily use a Tuple with Item1 and Item2, or a KeyValuePair with Key and Value instead of Value and Description or any other class of your choice as long as it has can hold an enum value and string description of that enum value.
It depends a bit on your needs. Some toolkits are better at drawing, others are better for writing text. Cairo has a pretty good for drawing (it support a wide range of screen and file types, including pdf), but it may not be ideal for good typography.
Getting EXIF data from a JPEG image involves:
Sphinx is mainly a tool for formatting docs written independently from the source code, as I understand it.
For generating API docs from Python docstrings, the leading tools are pdoc and pydoctor. Here's pydoctor's generated API docs for Twisted and Bazaar.
Of course, if you just want to have a look at the docstrings while you're working on stuff, there's the "pydoc" command line tool and as well as the help() function available in the interactive interpreter.
I wrote a validator of mime type. Kindly share it with you.
private readonly Dictionary<string, byte[]> _mimeTypes = new Dictionary<string, byte[]>
{
{"image/jpeg", new byte[] {255, 216, 255}},
{"image/jpg", new byte[] {255, 216, 255}},
{"image/pjpeg", new byte[] {255, 216, 255}},
{"image/apng", new byte[] {137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82}},
{"image/png", new byte[] {137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82}},
{"image/bmp", new byte[] {66, 77}},
{"image/gif", new byte[] {71, 73, 70, 56}},
};
private bool ValidateMimeType(byte[] file, string contentType)
{
var imageType = _mimeTypes.SingleOrDefault(x => x.Key.Equals(contentType));
return file.Take(imageType.Value.Length).SequenceEqual(imageType.Value);
}
This doesn't necessarily touch on OOP capabilities but in our last set of interviews we used a selection of buggy code from the Bug of the Month list. Watching the candidates find the bugs shows their analytical capabilities, shows the know how to interpret somebody elses code
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.*;
public class HelloWorldFrame extends JFrame implements ActionListener {
JButton b;
public HelloWorldFrame() {
this.setVisible(true);
this.setLayout(null);
b = new JButton("Click Here");
b.setBounds(380, 290, 120, 60);
b.setBackground(Color.red);
b.setVisible(true);
b.addActionListener(this);
add(b);
setSize(1000, 700);
}
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == b)
{
this.dispose();
try {
Thread.sleep(1000);
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension d = tk.getScreenSize();
Rectangle rec = new Rectangle(0, 0, d.width, d.height);
Robot ro = new Robot();
BufferedImage img = ro.createScreenCapture(rec);
File f = new File("myimage.jpg");//set appropriate path
ImageIO.write(img, "jpg", f);
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
}
public static void main(String[] args) {
HelloWorldFrame obj = new HelloWorldFrame();
}
}
window.opener=window;
window.close();
(function($)
{
return this.each(function()
{
var classes = $(this).attr('class');
if(!classes || !regex) return false;
var classArray = [];
classes = classes.split(' ');
for(var i=0, len=classes.length; i<len; i++) if(!classes[i].match(regex)) classArray.push(classes[i]);
$(this).attr('class', classArray.join(' '));
});
})(jQuery);
Had a similar problem when find an object by id... All i did was to use the fully qualified name in the class name. That is Before it was :
find("Class",id)
Object so it became like this :
find("assemblyName.Class",id)
For completeness, if you want the two's-complement hexadecimal representation of a negative number, you can use the zero-fill-right shift >>> operator. For instance:
> (-1).toString(16)
"-1"
> ((-2)>>>0).toString(16)
"fffffffe"
There is however one limitation: JavaScript bitwise operators treat their operands as a sequence of 32 bits, that is, you get the 32-bits two's complement.
I just want to point out that two of the solutions offered previously,
do not do what the question asked for:
Include in project while preserving the directory structure.
At least not in my case (C++/CLI project Visual Studio 2013 on Windows 7).
In Visual Studio, once you are back in the normal view (not Show All Files), the files you added are all listed at the top level of the project.
Yes, on disk they still reside where they were, but in Solution Explorer they are loose.
I did not find a way around it except recreating the directory structure in Solution Explorer and then doing Add Existing Items at the right location.
adjust the background-position to move background images in different positions of the div
div {
background-image: url('image url')
background-position: 0 -250px;
}
create procedure getDatedifference
(
@startdate datetime,
@enddate datetime
)
as
begin
declare @monthToShow int
declare @dayToShow int
--set @startdate='01/21/1934'
--set @enddate=getdate()
if (DAY(@startdate) > DAY(@enddate))
begin
set @dayToShow=0
if (month(@startdate) > month(@enddate))
begin
set @monthToShow= (12-month(@startdate)+ month(@enddate)-1)
end
else if (month(@startdate) < month(@enddate))
begin
set @monthToShow= ((month(@enddate)-month(@startdate))-1)
end
else
begin
set @monthToShow= 11
end
-- set @monthToShow= convert(int, DATEDIFF(mm,0,DATEADD(dd,DATEDIFF(dd,0,@enddate)- DATEDIFF(dd,0,@startdate),0)))-((convert(int,FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25))*12))-1
if(@monthToShow<0)
begin
set @monthToShow=0
end
declare @amonthbefore integer
set @amonthbefore=Month(@enddate)-1
if(@amonthbefore=0)
begin
set @amonthbefore=12
end
if (@amonthbefore in(1,3,5,7,8,10,12))
begin
set @dayToShow=31-DAY(@startdate)+DAY(@enddate)
end
if (@amonthbefore=2)
begin
IF (YEAR( @enddate ) % 4 = 0 AND YEAR( @enddate ) % 100 != 0) OR YEAR( @enddate ) % 400 = 0
begin
set @dayToShow=29-DAY(@startdate)+DAY(@enddate)
end
else
begin
set @dayToShow=28-DAY(@startdate)+DAY(@enddate)
end
end
if (@amonthbefore in (4,6,9,11))
begin
set @dayToShow=30-DAY(@startdate)+DAY(@enddate)
end
end
else
begin
--set @monthToShow=convert(int, DATEDIFF(mm,0,DATEADD(dd,DATEDIFF(dd,0,@enddate)- DATEDIFF(dd,0,@startdate),0)))-((convert(int,FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25))*12))
if (month(@enddate)< month(@startdate))
begin
set @monthToShow=12+(month(@enddate)-month(@startdate))
end
else
begin
set @monthToShow= (month(@enddate)-month(@startdate))
end
set @dayToShow=DAY(@enddate)-DAY(@startdate)
end
SELECT
FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25) as [yearToShow],
@monthToShow as monthToShow ,@dayToShow as dayToShow ,
convert(varchar,FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25)) +' Year ' + convert(varchar,@monthToShow) +' months '+convert(varchar,@dayToShow)+' days ' as age
return
end
Taryn? said:
You can't take the address of a reference like you can with pointers.
Actually you can.
I'm quoting from an answer on another question:
The C++ FAQ says it best:
Unlike a pointer, once a reference is bound to an object, it can not be "reseated" to another object. The reference itself isn't an object (it has no identity; taking the address of a reference gives you the address of the referent; remember: the reference is its referent).
Alternative syntax:
INSERT tbl (Col1, Col2, ..., ColN)
SELECT Col1, Col2, ..., ColN
FROM Tbl2
WHERE ...
The select query can (of course) include expressions, case statements, constants/literals, etc.
Use your own judgement and be smart. Don't always do what others (like me) are saying. You will hear "prefer interfaces to abstract classes" but it really depends. It depends what the class is.
In the above mentioned case where we have a hierarchy of objects, interface is a good idea. Interface helps to work with collections of these objects and it also helps when implementing a service working with any object of the hierarchy. You just define a contract for working with objects from the hierarchy.
On the other hand when you implement a bunch of services that share a common functionality you can either separate the common functionality into a complete separate class or you can move it up into a common base class and make it abstract so that nobody can instantiate the base class.
Also consider this how to support your abstractions over time. Interfaces are fixed: You release an interface as a contract for a set of functionality that any type can implement. Base classes can be extended over time. Those extensions become part of every derived class.
LISKOV SUBSTITUTION PRINCIPLE (From Mark Seemann book) states that we should be able to replace one implementation of an interface with another without breaking either client or implementation.It’s this principle that enables to address requirements that occur in the future, even if we can’t foresee them today.
If we unplug the computer from the wall (Implementation), neither the wall outlet (Interface) nor the computer (Client) breaks down (in fact, if it’s a laptop computer, it can even run on its batteries for a period of time). With software, however, a client often expects a service to be available. If the service was removed, we get a NullReferenceException. To deal with this type of situation, we can create an implementation of an interface that does “nothing.” This is a design pattern known as Null Object,[4] and it corresponds roughly to unplugging the computer from the wall. Because we’re using loose coupling, we can replace a real implementation with something that does nothing without causing trouble.