Here is the code of ReadDoc/docx.java: This will read a dox/docx file and print its content to the console. you can customize it your way.
import java.io.*;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.extractor.WordExtractor;
public class ReadDocFile
{
public static void main(String[] args)
{
File file = null;
WordExtractor extractor = null;
try
{
file = new File("c:\\New.doc");
FileInputStream fis = new FileInputStream(file.getAbsolutePath());
HWPFDocument document = new HWPFDocument(fis);
extractor = new WordExtractor(document);
String[] fileData = extractor.getParagraphText();
for (int i = 0; i < fileData.length; i++)
{
if (fileData[i] != null)
System.out.println(fileData[i]);
}
}
catch (Exception exep)
{
exep.printStackTrace();
}
}
}
we can do it with a single line of code.
user1 = pd.read_csv('dataset/1.csv', names=['TIME', 'X', 'Y', 'Z'], header=None)
I prefer something simple like this:
function waitFor(variable, callback) {
var interval = setInterval(function() {
if (window[variable]) {
clearInterval(interval);
callback();
}
}, 200);
}
And then to use it with your example variable of someVariable
:
waitFor('someVariable', function() {
// do something here now that someVariable is defined
});
Note that there are various tweaks you can do. In the above setInterval
call, I've passed 200
as how often the interval function should run. There is also an inherent delay of that amount of time (~200ms) before the variable is checked for -- in some cases, it's nice to check for it right away so there is no delay.
An Error Was Encountered Unable to load the requested file:
Sometimes we face this error because the requested file doesn't exist in that directory.
Suppose we have a folder home
in views
directory and trying to load home_view.php
file as:
$this->load->view('home/home_view', $data);// $data is array
If home_view.php
file doesn't exist in views/home
directory then it will raise an error.
An Error Was Encountered Unable to load the requested file: home\home_view.php
So how to fix this error go to views/home
and check the home_view.php
file exist if not then create it.
This is coming a bit late, but here's a solution I use to vertical align elements within a parent div.
This is useful for when you know the size of the container div, but not that of the contained image. (this is frequently the case when working with lightboxes or image carousels).
Here's the styling you should try:
container div
{
display:table-cell;
vertical-align:middle;
height:200px;
width:200px;
}
img
{
/*Apply any styling here*/
}
Post deleting and adding your new profile, you can verify if the profile is active and been take by your project by running below command.
grep -i "yourproject" *.mobileprovision
I have faced same problem and It will resolve this issue in all android versions
private void setCookie() {
try {
CookieSyncManager.createInstance(context);
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
cookieManager.setCookie(Constant.BASE_URL, getCookie(), value -> {
String cookie = cookieManager.getCookie(Constant.BASE_URL);
CookieManager.getInstance().flush();
CustomLog.d("cookie", "cookie ------>" + cookie);
setupWebView();
});
} else {
cookieManager.setCookie(webUrl, getCookie());
new Handler().postDelayed(this::setupWebView, 700);
CookieSyncManager.getInstance().sync();
}
} catch (Exception e) {
CustomLog.e(e);
}
}
You can also use BreakIterator.getWordInstance
.
Not a proper answer but in my case
something completely strange. I was trying from last six hours using Transporter app, Application Loader and via Xcode but none of them was working.
And suddenly I got an error message on the Transporter app that App with same version number is already available on Apple store.
So App was uploaded but the progress status of the app (Transporter, Xcode, Application Loader) did not notify me.
Try to change your network, if possible try with other system.
For me, it is not about a "common aggregation problem", but just about an incorrect SQL query. The single correct answer for "select the maximum avg for each cname..." is
SELECT cname, MAX(avg) FROM makerar GROUP BY cname;
The result will be:
cname | MAX(avg)
--------+---------------------
canada | 2.0000000000000000
spain | 5.0000000000000000
This result in general answers the question "What is the best result for each group?". We see that the best result for spain is 5 and for canada the best result is 2. It is true, and there is no error. If we need to display wmname also, we have to answer the question: "What is the RULE to choose wmname from resulting set?" Let's change the input data a bit to clarify the mistake:
cname | wmname | avg
--------+--------+-----------------------
spain | zoro | 1.0000000000000000
spain | luffy | 5.0000000000000000
spain | usopp | 5.0000000000000000
Which result do you expect on runnig this query: SELECT cname, wmname, MAX(avg) FROM makerar GROUP BY cname;
? Should it be spain+luffy
or spain+usopp
? Why? It is not determined in the query how to choose "better" wmname if several are suitable, so the result is also not determined. That's why SQL interpreter returns an error - the query is not correct.
In the other word, there is no correct answer to the question "Who is the best in spain
group?". Luffy is not better than usopp, because usopp has the same "score".
Ftrujillo's answer works well but if you only have one package to scan this is the shortest form::
@Bean
public Jaxb2Marshaller marshaller() {
Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
marshaller.setContextPath("your.package.to.scan");
return marshaller;
}
I made some optimization in the row, col, diagonal checks. Its mainly decided in the first nested loop if we need to check a particular column or diagonal. So, we avoid checking of columns or diagonals saving time. This makes big impact when the board size is more and a significant number of the cells are not filled.
Here is the java code for that.
int gameState(int values[][], int boardSz) {
boolean colCheckNotRequired[] = new boolean[boardSz];//default is false
boolean diag1CheckNotRequired = false;
boolean diag2CheckNotRequired = false;
boolean allFilled = true;
int x_count = 0;
int o_count = 0;
/* Check rows */
for (int i = 0; i < boardSz; i++) {
x_count = o_count = 0;
for (int j = 0; j < boardSz; j++) {
if(values[i][j] == x_val)x_count++;
if(values[i][j] == o_val)o_count++;
if(values[i][j] == 0)
{
colCheckNotRequired[j] = true;
if(i==j)diag1CheckNotRequired = true;
if(i + j == boardSz - 1)diag2CheckNotRequired = true;
allFilled = false;
//No need check further
break;
}
}
if(x_count == boardSz)return X_WIN;
if(o_count == boardSz)return O_WIN;
}
/* check cols */
for (int i = 0; i < boardSz; i++) {
x_count = o_count = 0;
if(colCheckNotRequired[i] == false)
{
for (int j = 0; j < boardSz; j++) {
if(values[j][i] == x_val)x_count++;
if(values[j][i] == o_val)o_count++;
//No need check further
if(values[i][j] == 0)break;
}
if(x_count == boardSz)return X_WIN;
if(o_count == boardSz)return O_WIN;
}
}
x_count = o_count = 0;
/* check diagonal 1 */
if(diag1CheckNotRequired == false)
{
for (int i = 0; i < boardSz; i++) {
if(values[i][i] == x_val)x_count++;
if(values[i][i] == o_val)o_count++;
if(values[i][i] == 0)break;
}
if(x_count == boardSz)return X_WIN;
if(o_count == boardSz)return O_WIN;
}
x_count = o_count = 0;
/* check diagonal 2 */
if( diag2CheckNotRequired == false)
{
for (int i = boardSz - 1,j = 0; i >= 0 && j < boardSz; i--,j++) {
if(values[j][i] == x_val)x_count++;
if(values[j][i] == o_val)o_count++;
if(values[j][i] == 0)break;
}
if(x_count == boardSz)return X_WIN;
if(o_count == boardSz)return O_WIN;
x_count = o_count = 0;
}
if( allFilled == true)
{
for (int i = 0; i < boardSz; i++) {
for (int j = 0; j < boardSz; j++) {
if (values[i][j] == 0) {
allFilled = false;
break;
}
}
if (allFilled == false) {
break;
}
}
}
if (allFilled)
return DRAW;
return INPROGRESS;
}
I'm using autolayout and none of the answers worked for me. Here is my solution that finally worked:
@property (nonatomic, assign) BOOL shouldScrollToLastRow;
- (void)viewDidLoad {
[super viewDidLoad];
_shouldScrollToLastRow = YES;
}
- (void)viewDidLayoutSubviews {
[super viewDidLayoutSubviews];
// Scroll table view to the last row
if (_shouldScrollToLastRow)
{
_shouldScrollToLastRow = NO;
[self.tableView setContentOffset:CGPointMake(0, CGFLOAT_MAX)];
}
}
I think fork is a copy of other repository but with your account modification. for example, if you directly clone other repository locally, the remote object origin is still using the account who you clone from. You can't commit and contribute your code. It is just a pure copy of codes. Otherwise, If you fork a repository, it will clone the repo with the update of your account setting in you github account. And then cloning the repo in the context of your account, you can commit your codes.
A solution with works with Python 2.X and Python 3.X:
try:
# For Python 3.0 and later
from urllib.request import urlopen
except ImportError:
# Fall back to Python 2's urllib2
from urllib2 import urlopen
url = 'http://hiscore.runescape.com/index_lite.ws?player=zezima'
response = urlopen(url)
data = str(response.read())
I wanted a flexible sticky footer, which is why I came here. Top answers got me in the right direction.
The current (2 Oct 16) Bootstrap 3 css Sticky footer (Fixed size) looks like this:
html {
position: relative;
min-height: 100%;
}
body {
/* Margin bottom by footer height */
margin-bottom: 60px;
}
.footer {
position: absolute;
bottom: 0;
width: 100%;
/* Set the fixed height of the footer here */
height: 60px;
background-color: #f5f5f5;
}
As long as the footer has a fixed size, the body margin-bottom creates a push to allow a pocket for the footer to sit in. In this case, both are set to 60px. But if the footer is not fixed and exceeds 60px height, it will cover your page content.
Make Flexible: Delete the css body margin and footer height. Then add JavaScript to get the footer height and set the body marginBottom. That is done with the setfooter() function. Next add event listeners for when the page first loads and on resizing that run the setfooter. Note: If you footer has an accordion or anything else that triggers a size change, without a resize of window, you must call the setfooter() function again.
Run the snippet and then fullscreen to demo it.
function setfooter(){_x000D_
var ht = document.getElementById("footer").scrollHeight;_x000D_
document.body.style.marginBottom = ht + "px";_x000D_
}_x000D_
_x000D_
window.addEventListener('resize', function(){_x000D_
setfooter();_x000D_
}, true);_x000D_
window.addEventListener('load', function(){_x000D_
setfooter();_x000D_
}, true);
_x000D_
html {_x000D_
position: relative;_x000D_
min-height: 100%;_x000D_
}_x000D_
.footer {_x000D_
position: absolute;_x000D_
bottom: 0;_x000D_
width: 100%;_x000D_
_x000D_
/* additional style for effect only */_x000D_
text-align: center;_x000D_
background-color: #333;_x000D_
color: #fff;_x000D_
}_x000D_
_x000D_
_x000D_
_x000D_
body{_x000D_
/* additional style for effect only not needed in bootstrap*/_x000D_
padding:0;_x000D_
margin: 0;_x000D_
}
_x000D_
<div>_x000D_
Page content_x000D_
<br> <br>_x000D_
line 3_x000D_
<br> <br>_x000D_
line 5_x000D_
<br> <br>_x000D_
line 7_x000D_
_x000D_
</div>_x000D_
_x000D_
_x000D_
<footer id="footer" class="footer">_x000D_
<div class="container">_x000D_
<p class="text-muted">Footer with a long text, so that resizing, to a smaller screen size, will cause the footer to grow taller. But the footer will not overflow onto the main page.</p>_x000D_
</div>_x000D_
</footer>
_x000D_
Regarding the answer from Michael Wyraz, where you use alt*DeploymentRepository
in your settings.xml
or command on the line, be careful if you are using version 3.0.0-M1 of the maven-deploy-plugin (which is the latest version at the time of writing), there is a bug in this version that could cause a server authentication issue.
A workaround is as follows. In the value:
releases::default::https://YOUR_NEXUS_URL/releases
you need to remove the default
section, making it:
releases::https://YOUR_NEXUS_URL/releases
The prior version 2.8.2 does not have this bug.
The problem with catching the click event is that each subsequent click within the text will select it again, whereas the user was probably expecting to reposition the cursor.
What worked for me was declaring a variable, selectSearchTextOnClick, and setting it to true by default. The click handler checks that the variable's still true: if it is, it sets it to false and performs the select(). I then have a blur event handler which sets it back to true.
Results so far seem like the behavior I'd expect.
(Edit: I neglected to say that I'd tried catching the focus event as someone suggested,but that doesn't work: after the focus event fires, the click event can fire, immediately deselecting the text).
Are you sure you selected Console Application? I'm running VS 2010 and with the vanilla settings a C# console app builds to \bin\debug. Try to create a new Console Application project, with the language set to C#. Build the project, and go to Project/[Console Application 1]Properties. In the Build tab, what is the Output path? It should default to bin\debug, unless you have some restricted settings on your workstation,etc. Also review the build output window and see if any errors are being thrown - in which case nothing will be built to the output folder, of course...
Python 3 handles strings a bit different. Originally there was just one type for
strings: str
. When unicode gained traction in the '90s the new unicode
type
was added to handle Unicode without breaking pre-existing code1. This is
effectively the same as str
but with multibyte support.
In Python 3 there are two different types:
bytes
type. This is just a sequence of bytes, Python doesn't know
anything about how to interpret this as characters.str
type. This is also a sequence of bytes, but Python knows how to
interpret those bytes as characters.unicode
type was dropped. str
now supports unicode.In Python 2 implicitly assuming an encoding could cause a lot of problems; you
could end up using the wrong encoding, or the data may not have an encoding at
all (e.g. it’s a PNG image).
Explicitly telling Python which encoding to use (or explicitly telling it to
guess) is often a lot better and much more in line with the "Python philosophy"
of "explicit is better than implicit".
This change is incompatible with Python 2 as many return values have changed,
leading to subtle problems like this one; it's probably the main reason why
Python 3 adoption has been so slow. Since Python doesn't have static typing2
it's impossible to change this automatically with a script (such as the bundled
2to3
).
str
to bytes
with bytes('h€llo', 'utf-8')
; this should
produce b'H\xe2\x82\xacllo'
. Note how one character was converted to three
bytes.bytes
to str
with b'H\xe2\x82\xacllo'.decode('utf-8')
.Of course, UTF-8 may not be the correct character set in your case, so be sure to use the correct one.
In your specific piece of code, nextline
is of type bytes
, not str
,
reading stdout
and stdin
from subprocess
changed in Python 3 from str
to
bytes
. This is because Python can't be sure which encoding this uses. It
probably uses the same as sys.stdin.encoding
(the encoding of your system),
but it can't be sure.
You need to replace:
sys.stdout.write(nextline)
with:
sys.stdout.write(nextline.decode('utf-8'))
or maybe:
sys.stdout.write(nextline.decode(sys.stdout.encoding))
You will also need to modify if nextline == ''
to if nextline == b''
since:
>>> '' == b''
False
Also see the Python 3 ChangeLog, PEP 358, and PEP 3112.
1 There are some neat tricks you can do with ASCII that you can't do with multibyte character sets; the most famous example is the "xor with space to switch case" (e.g. chr(ord('a') ^ ord(' ')) == 'A'
) and "set 6th bit to make a control character" (e.g. ord('\t') + ord('@') == ord('I')
). ASCII was designed in a time when manipulating individual bits was an operation with a non-negligible performance impact.
2 Yes, you can use function annotations, but it's a comparatively new feature and little used.
Once you have a JArray you can treat it just like any other Enumerable object, and using linq you can access them, check them, verify them, and select them.
var str = @"[1, 2, 3]";
var jArray = JArray.Parse(str);
Console.WriteLine(String.Join("-", jArray.Where(i => (int)i > 1).Select(i => i.ToString())));
To represent the fact that the value is not present you have two choices:
1) If the whole char
range is meaningful and you cannot reserve any value, then use char*
instead of char
:
char** c = new char*[N];
c[0] = NULL; // no character
*c[1] = ' '; // ordinary character
*c[2] = 'a'; // ordinary character
*c[3] = '\0' // zero-code character
Then you'll have c[i] == NULL
for when character is not present and otherwise *c[i]
for ordinary characters.
2) If you don't need some values representable in char
then reserve one for indicating that value is not present, for example the '\0'
character.
char* c = new char[N];
c[0] = '\0'; // no character
c[1] = ' '; // ordinary character
c[2] = 'a'; // ordinary character
Then you'll have c[i] == '\0'
for when character is not present and ordinary characters otherwise.
import javax.swing.Action;
import javax.swing.ButtonGroup;
import javax.swing.Icon;
import javax.swing.JRadioButton;
import javax.swing.JToggleButton;
public class RadioButton extends JRadioButton {
public class RadioButtonModel extends JToggleButton.ToggleButtonModel {
public Object[] getSelectedObjects() {
if ( isSelected() ) {
return new Object[] { RadioButton.this };
} else {
return new Object[0];
}
}
public RadioButton getButton() { return RadioButton.this; }
}
public RadioButton() { super(); setModel(new RadioButtonModel()); }
public RadioButton(Action action) { super(action); setModel(new RadioButtonModel()); }
public RadioButton(Icon icon) { super(icon); setModel(new RadioButtonModel()); }
public RadioButton(String text) { super(text); setModel(new RadioButtonModel()); }
public RadioButton(Icon icon, boolean selected) { super(icon, selected); setModel(new RadioButtonModel()); }
public RadioButton(String text, boolean selected) { super(text, selected); setModel(new RadioButtonModel()); }
public RadioButton(String text, Icon icon) { super(text, icon); setModel(new RadioButtonModel()); }
public RadioButton(String text, Icon icon, boolean selected) { super(text, icon, selected); setModel(new RadioButtonModel()); }
public static void main(String[] args) {
RadioButton b1 = new RadioButton("A");
RadioButton b2 = new RadioButton("B");
ButtonGroup group = new ButtonGroup();
group.add(b1);
group.add(b2);
b2.setSelected(true);
RadioButtonModel model = (RadioButtonModel)group.getSelection();
System.out.println(model.getButton().getText());
}
}
If you have a string of binary data which is Base64 encoded, you should be able to do the following:
byte[] encodedDataAsBytes = System.Convert.FromBase64String(encodedData);
You should be able to write the resulting array to a file.
First off, the obvious answer that no one has provided, you need to install Babel into your application:
npm install babel --save
(or babel-core
if you instead want to require('babel-core/polyfill')
).
Aside from that, I have a grunt task to transpile my es6 and jsx as a build step (i.e. I don't want to use babel/register
, which is why I am trying to use babel/polyfill
directly in the first place), so I'd like to put more emphasis on this part of @ssube's answer:
Make sure you require it at the entry-point to your application, before anything else is called
I ran into some weird issue where I was trying to require babel/polyfill
from some shared environment startup file and I got the error the user referenced - I think it might have had something to do with how babel orders imports versus requires but I'm unable to reproduce now. Anyway, moving import 'babel/polyfill'
as the first line in both my client and server startup scripts fixed the problem.
Note that if you instead want to use require('babel/polyfill')
I would make sure all your other module loader statements are also requires and not use imports - avoid mixing the two. In other words, if you have any import statements in your startup script, make import babel/polyfill
the first line in your script rather than require('babel/polyfill')
.
If the line's coordinates are A.x, A.y and B.x, B.y and the circles center is C.x, C.y then the lines formulae are:
x = A.x * t + B.x * (1 - t)
y = A.y * t + B.y * (1 - t)
where 0<=t<=1
and the circle is
(C.x - x)^2 + (C.y - y)^2 = R^2
if you substitute x and y formulae of the line into the circles formula you get a second order equation of t and its solutions are the intersection points (if there are any). If you get a t which is smaller than 0 or greater than 1 then its not a solution but it shows that the line is 'pointing' to the direction of the circle.
Another type of solution would be to autogenerate the nginx conf files via Jinja2 templates from ansible. The advantage of this is easy deployment to a cloud environment, and easy to replicate on multiple dev machines
I believe Quassnoi has answered your direct question. Just a side note: Maybe this is just some awkward wording on your part, but you seem to be under the impression that you have three primary keys, one on each field. This is not the case. By definition, you can only have one primary key. What you have here is a primary key that is a composite of three fields. Thus, you cannot "drop the primary key on a column". You can drop the primary key, or not drop the primary key. If you want a primary key that only includes one column, you can drop the existing primary key on 3 columns and create a new primary key on 1 column.
In JavaScript Arrays and Objects are actually very similar, although on the outside they can look a bit different.
For an array:
var array = [];
array[0] = "hello";
array[1] = 5498;
array[536] = new Date();
As you can see arrays in JavaScript can be sparse (valid indicies don't have to be consecutive) and they can contain any type of variable! That's pretty convenient.
But as we all know JavaScript is strange, so here are some weird bits:
array["0"] === "hello"; // This is true
array["hi"]; // undefined
array["hi"] = "weird"; // works but does not save any data to array
array["hi"]; // still undefined!
This is because everything in JavaScript is an Object (which is why you can also create an array using new Array()
). As a result every index in an array is turned into a string and then stored in an object, so an array is just an object that doesn't allow anyone to store anything with a key that isn't a positive integer.
So what are Objects?
Objects in JavaScript are just like arrays but the "index" can be any string.
var object = {};
object[0] = "hello"; // OK
object["hi"] = "not weird"; // OK
You can even opt to not use the square brackets when working with objects!
console.log(object.hi); // Prints 'not weird'
object.hi = "overwriting 'not weird'";
You can go even further and define objects like so:
var newObject = {
a: 2,
};
newObject.a === 2; // true
Here’s an example defines a SimpleDateFormat object as a static field. When two or more threads access “someMethod” concurrently with different dates, they can mess with each other’s results.
public class SimpleDateFormatExample {
private static final SimpleDateFormat simpleFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
public String someMethod(Date date) {
return simpleFormat.format(date);
}
}
You can create a service like below and use jmeter to simulate concurrent users using the same SimpleDateFormat object formatting different dates and their results will be messed up.
public class FormattedTimeHandler extends AbstractHandler {
private static final String OUTPUT_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";
private static final String INPUT_TIME_FORMAT = "yyyy-MM-ddHH:mm:ss";
private static final SimpleDateFormat simpleFormat = new SimpleDateFormat(OUTPUT_TIME_FORMAT);
// apache commons lang3 FastDateFormat is threadsafe
private static final FastDateFormat fastFormat = FastDateFormat.getInstance(OUTPUT_TIME_FORMAT);
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html;charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
baseRequest.setHandled(true);
final String inputTime = request.getParameter("time");
Date date = LocalDateTime.parse(inputTime, DateTimeFormat.forPattern(INPUT_TIME_FORMAT)).toDate();
final String method = request.getParameter("method");
if ("SimpleDateFormat".equalsIgnoreCase(method)) {
// use SimpleDateFormat as a static constant field, not thread safe
response.getWriter().println(simpleFormat.format(date));
} else if ("FastDateFormat".equalsIgnoreCase(method)) {
// use apache commons lang3 FastDateFormat, thread safe
response.getWriter().println(fastFormat.format(date));
} else {
// create new SimpleDateFormat instance when formatting date, thread safe
response.getWriter().println(new SimpleDateFormat(OUTPUT_TIME_FORMAT).format(date));
}
}
public static void main(String[] args) throws Exception {
// embedded jetty configuration, running on port 8090. change it as needed.
Server server = new Server(8090);
server.setHandler(new FormattedTimeHandler());
server.start();
server.join();
}
}
The code and jmeter script can be downloaded here .
try this following snippet, its working fine.
private void button1_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog openfile1 = new OpenFileDialog();
if (openfile1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
this.textBox1.Text = openfile1.FileName;
}
{
string pathconn = "Provider = Microsoft.jet.OLEDB.4.0; Data source=" + textBox1.Text + ";Extended Properties=\"Excel 8.0;HDR= yes;\";";
OleDbConnection conn = new OleDbConnection(pathconn);
OleDbDataAdapter MyDataAdapter = new OleDbDataAdapter("Select * from [" + textBox2.Text + "$]", conn);
DataTable dt = new DataTable();
MyDataAdapter.Fill(dt);
dataGridView1.DataSource = dt;
}
}
catch { }
}
This question has been addressed, in a slightly different form, at length, here:
But this addresses it from the server-side. Let's look at this from the client-side. Before we do that, though, there's an important prelude:
Matasano's article on this is famous, but the lessons contained therein are pretty important:
To summarize:
<script>
function hash_algorithm(password){ lol_nope_send_it_to_me_instead(password); }</script>
And to add a corollary of my own:
This renders a lot of RESTful authentication schemes impossible or silly if you're intending to use a JavaScript client. Let's look!
First and foremost, HTTP Basic Auth. The simplest of schemes: simply pass a name and password with every request.
This, of course, absolutely requires SSL, because you're passing a Base64 (reversibly) encoded name and password with every request. Anybody listening on the line could extract username and password trivially. Most of the "Basic Auth is insecure" arguments come from a place of "Basic Auth over HTTP" which is an awful idea.
The browser provides baked-in HTTP Basic Auth support, but it is ugly as sin and you probably shouldn't use it for your app. The alternative, though, is to stash username and password in JavaScript.
This is the most RESTful solution. The server requires no knowledge of state whatsoever and authenticates every individual interaction with the user. Some REST enthusiasts (mostly strawmen) insist that maintaining any sort of state is heresy and will froth at the mouth if you think of any other authentication method. There are theoretical benefits to this sort of standards-compliance - it's supported by Apache out of the box - you could store your objects as files in folders protected by .htaccess files if your heart desired!
The problem? You are caching on the client-side a username and password. This gives evil.ru a better crack at it - even the most basic of XSS vulnerabilities could result in the client beaming his username and password to an evil server. You could try to alleviate this risk by hashing and salting the password, but remember: JavaScript Crypto is Hopeless. You could alleviate this risk by leaving it up to the Browser's Basic Auth support, but.. ugly as sin, as mentioned earlier.
Is Digest authentication possible with jQuery?
A more "secure" auth, this is a request/response hash challenge. Except JavaScript Crypto is Hopeless, so it only works over SSL and you still have to cache the username and password on the client side, making it more complicated than HTTP Basic Auth but no more secure.
Another more "secure" auth, where you encrypt your parameters with nonce and timing data (to protect against repeat and timing attacks) and send the. One of the best examples of this is the OAuth 1.0 protocol, which is, as far as I know, a pretty stonking way to implement authentication on a REST server.
http://tools.ietf.org/html/rfc5849
Oh, but there aren't any OAuth 1.0 clients for JavaScript. Why?
JavaScript Crypto is Hopeless, remember. JavaScript can't participate in OAuth 1.0 without SSL, and you still have to store the client's username and password locally - which puts this in the same category as Digest Auth - it's more complicated than HTTP Basic Auth but it's no more secure.
The user sends a username and password, and in exchange gets a token that can be used to authenticate requests.
This is marginally more secure than HTTP Basic Auth, because as soon as the username/password transaction is complete you can discard the sensitive data. It's also less RESTful, as tokens constitute "state" and make the server implementation more complicated.
The rub though, is that you still have to send that initial username and password to get a token. Sensitive information still touches your compromisable JavaScript.
To protect your user's credentials, you still need to keep attackers out of your JavaScript, and you still need to send a username and password over the wire. SSL Required.
It's common to enforce token policies like "hey, when this token has been around too long, discard it and make the user authenticate again." or "I'm pretty sure that the only IP address allowed to use this token is XXX.XXX.XXX.XXX
". Many of these policies are pretty good ideas.
However, using a token Without SSL is still vulnerable to an attack called 'sidejacking': http://codebutler.github.io/firesheep/
The attacker doesn't get your user's credentials, but they can still pretend to be your user, which can be pretty bad.
tl;dr: Sending unencrypted tokens over the wire means that attackers can easily nab those tokens and pretend to be your user. FireSheep is a program that makes this very easy.
The larger the application that you're running, the harder it is to absolutely ensure that they won't be able to inject some code that changes how you process sensitive data. Do you absolutely trust your CDN? Your advertisers? Your own code base?
Common for credit card details and less common for username and password - some implementers keep 'sensitive data entry' on a separate page from the rest of their application, a page that can be tightly controlled and locked down as best as possible, preferably one that is difficult to phish users with.
It is possible (and common) to put the authentication token in a cookie. This doesn't change any of the properties of auth with the token, it's more of a convenience thing. All of the previous arguments still apply.
Session Auth is just Token authentication, but with a few differences that make it seem like a slightly different thing:
Aside from that, though, it's no different from Token Auth, really.
This wanders even further from a RESTful implementation - with state objects you're going further and further down the path of plain ol' RPC on a stateful server.
OAuth 2.0 looks at the problem of "How does Software A give Software B access to User X's data without Software B having access to User X's login credentials."
The implementation is very much just a standard way for a user to get a token, and then for a third party service to go "yep, this user and this token match, and you can get some of their data from us now."
Fundamentally, though, OAuth 2.0 is just a token protocol. It exhibits the same properties as other token protocols - you still need SSL to protect those tokens - it just changes up how those tokens are generated.
There are two ways that OAuth 2.0 can help you:
But when it comes down to it, you're just... using tokens.
So, the question that you're asking is "should I store my token in a cookie and have my environment's automatic session management take care of the details, or should I store my token in Javascript and handle those details myself?"
And the answer is: do whatever makes you happy.
The thing about automatic session management, though, is that there's a lot of magic happening behind the scenes for you. Often it's nicer to be in control of those details yourself.
The other answer is: Use https for everything or brigands will steal your users' passwords and tokens.
The exponential function is e^x
where e
is a mathematical constant called Euler's number, approximately 2.718281
. This value has a close mathematical relationship with pi
and the slope of the curve e^x
is equal to its value at every point. np.exp()
calculates e^x
for each value of x
in your input array.
It depends on what datatype you set for your db table.
INSERT INTO t1 (dateposted) VALUES ( NOW() )
// This will insert date and time into the col. Do not use quote around the val
PHP
$dt = date('Y-m-d h:i:s');
INSERT INTO t1 (dateposted) VALUES ( '$dt' )
// This will insert date into the col using php var. Wrap with quote.
INSERT INTO t1 (dateposted) VALUES ( NOW() )
// Yes, you use the same NOW() without the quotes.
// Because your datatype is set to DATE it will insert only the date
PHP
$dt = date('Y-m-d');
INSERT INTO t1 (dateposted) VALUES ( '$dt' )
// This will insert date into the col using php var.
INSERT INTO t1 (dateposted) VALUES ( NOW() )
// Yes, you use the same NOW() as well.
// Because your datatype is set to TIME it will insert only the time
PHP
$dt = date('h:i:s');
INSERT INTO t1 (dateposted) VALUES ( '$dt' )
// This will insert time.
hist
can not only plot an histogram but also return you the count of elements in each bin, so you can get that count, normalize it by dividing each bin by the total and plotting the result using bar
. Example:
Y = rand(10,1);
C = hist(Y);
C = C ./ sum(C);
bar(C)
or if you want a one-liner:
bar(hist(Y) ./ sum(hist(Y)))
Edit: This solution answers the question How to have the sum of all bins equal to 1. This approximation is valid only if your bin size is small relative to the variance of your data. The sum used here correspond to a simple quadrature formula, more complex ones can be used like trapz
as proposed by R. M.
I had the same problem. Thank you to everyone else who answered - I was able to get a solution together using parts of several of these answers.
My solution is using swift 5
The problem that we are trying to solve is that we may have images with different aspect ratios in our TableViewCell
s but we want them to render with consistent widths. The images should, of course, render with no distortion and fill the entire space. In my case, I was fine with some "cropping" of tall, skinny images, so I used the content mode .scaleAspectFill
To do this, I created a custom subclass of UITableViewCell
. In my case, I named it StoryTableViewCell
. The entire class is pasted below, with comments inline.
This approach worked for me when also using a custom Accessory View and long text labels. Here's an image of the final result:
Rendered Table View with consistent image width
class StoryTableViewCell: UITableViewCell {
override func layoutSubviews() {
super.layoutSubviews()
// ==== Step 1 ====
// ensure we have an image
guard let imageView = self.imageView else {return}
// create a variable for the desired image width
let desiredWidth:CGFloat = 70;
// get the width of the image currently rendered in the cell
let currentImageWidth = imageView.frame.size.width;
// grab the width of the entire cell's contents, to be used later
let contentWidth = self.contentView.bounds.width
// ==== Step 2 ====
// only update the image's width if the current image width isn't what we want it to be
if (currentImageWidth != desiredWidth) {
//calculate the difference in width
let widthDifference = currentImageWidth - desiredWidth;
// ==== Step 3 ====
// Update the image's frame,
// maintaining it's original x and y values, but with a new width
self.imageView?.frame = CGRect(imageView.frame.origin.x,
imageView.frame.origin.y,
desiredWidth,
imageView.frame.size.height);
// ==== Step 4 ====
// If there is a texst label, we want to move it's x position to
// ensure it isn't overlapping with the image, and that it has proper spacing with the image
if let textLabel = self.textLabel
{
let originalFrame = self.textLabel?.frame
// the new X position for the label is just the original position,
// minus the difference in the image's width
let newX = textLabel.frame.origin.x - widthDifference
self.textLabel?.frame = CGRect(newX,
textLabel.frame.origin.y,
contentWidth - newX,
textLabel.frame.size.height);
print("textLabel info: Original =\(originalFrame!)", "updated=\(self.textLabel!.frame)")
}
// ==== Step 4 ====
// If there is a detail text label, do the same as step 3
if let detailTextLabel = self.detailTextLabel {
let originalFrame = self.detailTextLabel?.frame
let newX = detailTextLabel.frame.origin.x-widthDifference
self.detailTextLabel?.frame = CGRect(x: newX,
y: detailTextLabel.frame.origin.y,
width: contentWidth - newX,
height: detailTextLabel.frame.size.height);
print("detailLabel info: Original =\(originalFrame!)", "updated=\(self.detailTextLabel!.frame)")
}
// ==== Step 5 ====
// Set the image's content modoe to scaleAspectFill so it takes up the entire view, but doesn't get distorted
self.imageView?.contentMode = .scaleAspectFill;
}
}
}
You can use embed player with opacity over on a cover photo with a right positioned play icon. After this you can check the activeElement of your document.
Of course I know this is not an optimal solution, but works on mobile devices too.
<div style="position: relative;">
<img src="http://s3.amazonaws.com/content.newsok.com/newsok/images/mobile/play_button.png" style="position:absolute;top:0;left:0;opacity:1;" id="cover">
<iframe width="560" height="315" src="https://www.youtube.com/embed/2qhCjgMKoN4?controls=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in- picture" allowfullscreen style="position: absolute;top:0;left:0;opacity:0;" id="player"></iframe>
</div>
<script>
setInterval(function(){
if(document.activeElement instanceof HTMLIFrameElement){
document.getElementById('cover').style.opacity=0;
document.getElementById('player').style.opacity=1;
}
} , 50);
</script>
Try it on codepen: https://codepen.io/sarkiroka/pen/OryxGP
(Edited to include commenter's good additions:)
D
or its equivalent d$
will delete the rest of the line and leave you in command mode. C
or c$
will delete the rest of the line and put you in insert mode, and new text will be appended to the line.
This is part of vitutor
and vimtutor
, excellent "reads" for vim beginners.
Got a quick way to do it First
sudo rm /usr/bin/adb
Then
sudo ln -s /home/{{username}}/Android/Sdk/platform-tools/adb /usr/bin/adb
Fastest way to fix the issue
Simple solution for this common annoying issue:
Just go to your ".context.cs" file (located under ".context.tt" which located under your "*.edmx" file).
Then, add this line to your constructor:
public DBEntities()
: base("name=DBEntities")
{
this.Configuration.ProxyCreationEnabled = false; // ADD THIS LINE !
}
hope this is helpful.
As GvS said, but I also find it useful to use strongly typed views so that I can write something like
@Html.Partial(MVC.Student.Index(), model)
without magic strings.
I'm assuming that when you say 'click the button, it moves to the top a little' you're talking about the mouse down click state for the button, and that when you release the mouse click, it returns to its normal state? And that you're disabling the default rendering of the button by using:
input, button, submit { border:none; }
If so..
Personally, I've found that you can't actually stop/override/disable this IE native action, which led me to change my markup a little to allow for this movement and not affect the overall look of the button for the various states.
This is my final mark-up:
<span class="your-button-class">_x000D_
<span>_x000D_
<input type="Submit" value="View Person">_x000D_
</span>_x000D_
</span>
_x000D_
I had to stop the apache server first.
(f.e. sudo systemctl stop httpd.service
/ sudo systemctl disable httpd.service
).
That solved my problem besides editing the 'settings.py
' file
to ALLOWED_HOSTS = ['se.rv.er.ip', 'www.example.com']
Actually, if you're doing $('<div>')
, jQuery will also use document.createElement()
.
(Just take a look at line 117).
There is some function-call overhead, but unless performance is critical (you're creating hundreds [thousands] of elements), there isn't much reason to revert to plain DOM.
Just creating elements for a new webpage is probably a case in which you'll best stick to the jQuery way of doing things.
You can get more info about the error with the method $mail->ErrorInfo
. For example:
if(!$mail->send()) {
echo 'Message could not be sent.';
echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
echo 'Message has been sent';
}
This is an alternative to the exception model that you need to active with new PHPMailer(true)
. But if can use exception model, use it as @Phil Rykoff answer.
This comes from the main page of PHPMailer on github https://github.com/PHPMailer/PHPMailer.
An Object if passed as a value type then changes made to the members of the object inside the method are impacted outside the method also. But if the object itself is set to another object or reinitialized then it will not be reflected outside the method. So i would say object as a whole is passed as Valuetype only but object members are still reference type.
private void button1_Click(object sender, EventArgs e)
{
Class1 objc ;
objc = new Class1();
objc.empName = "name1";
checkobj( objc);
MessageBox.Show(objc.empName); //propert value changed; but object itself did not change
}
private void checkobj ( Class1 objc)
{
objc.empName = "name 2";
Class1 objD = new Class1();
objD.empName ="name 3";
objc = objD ;
MessageBox.Show(objc.empName); //name 3
}
You can give a try to my jQuery plugin, FixTo.
Usage:
$('#mydiv').fixTo('#centeredContainer');
var arr=[{"username":"sai","email":"[email protected],"}]
localStorage.setItem('logInArr', JSON.stringfy(arr))
new Integer(i).toString();
This statement creates the object of the Integer and then call its methods toString(i)
to return the String representation of Integer's value.
Integer.toString(i);
It returns the String object representing the specific int (integer), but here toString(int)
is a static
method.
Summary is in first case it returns the objects string representation, where as in second case it returns the string representation of integer.
I guess the following is not the best way to do it (speed and elegance concerns) but well, it could help :
from collections import OrderedDict as od
t = [('pineapple', 5), ('cherry', 7), ('kumquat', 3), ('plum', 11)]
list(od(t).keys()).index('kumquat')
2
list(od(t).values()).index(7)
7
# bonus :
od(t)['kumquat']
3
list of tuples with 2 members can be converted to ordered dict directly, data structures are actually the same, so we can use dict method on the fly.
There's an alternative to the StopIteration
by using next(iterator, default_value)
.
For exapmle:
>>> a = iter('hi')
>>> print next(a, None)
h
>>> print next(a, None)
i
>>> print next(a, None)
None
So you can detect for None
or other pre-specified value for end of the iterator if you don't want the exception way.
this seems to do the trick:
function goBackOrClose() {
window.history.back();
window.close();
//or if you are not interested in closing the window, do something else here
//e.g.
theBrowserCantGoBack();
}
Call history.back() and then window.close(). If the browser is able to go back in history it won't be able to get to the next statement. If it's not able to go back, it'll close the window.
However, please note that if the page has been reached by typing a url, then firefox wont allow the script to close the window.
This error occurs when the sdk-version installed on your device (real or virtual device) is smaller than android:minSdkVersion
in your android manifest.
You either have to decrease your android:minSdkVersion
or you have to specify a higher api-version for your AVD.
Keep in mind, that it is not always trivial to decrease android:minSdkVersion
as you have to make sure, your app cares about the actual installed API and uses the correct methods:
AsyncTask<String, Object, String> task = new AsyncTask<String, Object, String>() {
@Override
protected Boolean doInBackground(String... params) {
if (params == null) return "";
StringBuilder b = new StringBuilder();
for (String p : params) {
b.append(p);
}
return b.toString();
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,"Hello", " ", "world!");
} else {
task.execute("Hello", " ", "world!");
}
Using the android-support-library and/or libraries like actionbar-sherlock will help you dealing especially with widgets of older versions.
We can alter in the default 'jquery-ui.css' file as below given code:
div.ui-datepicker {
font-size: 80%;
}
However, changing the default 'jquery-ui.css' file is not recommended as it might have been used somewhere else in the project. Changing values in the default file can alter datepicker font in other webpages where it has been used.
I used the below code to alter "font-size". I placed it just after datepicker() is called as shown below.
<script>
$(function () {
$( "#datepicker" ).datepicker();
$("div.ui-datepicker").css("font-size", "80%")
});
</script>
Hope this helps...
So - the solution of providing a base works given that all of the paths have the same base path. But if you want to provide different base paths, this still won't work.
One way I solved this problem was by making the beginning of the path relative. For your case:
gulp.src([
'index.php',
'*css/**/*',
'*js/**/*',
'*src/**/*',
])
.pipe(gulp.dest('/var/www/'));
The reason this works is that Gulp sets the base to be the end of the first explicit chunk - the leading * causes it to set the base at the cwd (which is the result that we all want!)
This only works if you can ensure your folder structure won't have certain paths that could match twice. For example, if you had randomjs/
at the same level as js
, you would end up matching both.
This is the only way that I have found to include these as part of a top-level gulp.src function. It would likely be simple to create a plugin/function that could separate out each of those globs so you could specify the base directory for them, however.
You can presumably pass-in, as a parameter, a delegate which will convert from string to T.
If you are really about to work on multi-gigabyte text files then do not use PowerShell. Even if you find a way to read it faster processing of huge amount of lines will be slow in PowerShell anyway and you cannot avoid this. Even simple loops are expensive, say for 10 million iterations (quite real in your case) we have:
# "empty" loop: takes 10 seconds
measure-command { for($i=0; $i -lt 10000000; ++$i) {} }
# "simple" job, just output: takes 20 seconds
measure-command { for($i=0; $i -lt 10000000; ++$i) { $i } }
# "more real job": 107 seconds
measure-command { for($i=0; $i -lt 10000000; ++$i) { $i.ToString() -match '1' } }
UPDATE: If you are still not scared then try to use the .NET reader:
$reader = [System.IO.File]::OpenText("my.log")
try {
for() {
$line = $reader.ReadLine()
if ($line -eq $null) { break }
# process the line
$line
}
}
finally {
$reader.Close()
}
UPDATE 2
There are comments about possibly better / shorter code. There is nothing wrong with the original code with for
and it is not pseudo-code. But the shorter (shortest?) variant of the reading loop is
$reader = [System.IO.File]::OpenText("my.log")
while($null -ne ($line = $reader.ReadLine())) {
$line
}
The result integer value is out of the range which an integer data type can hold.
Try using Int64
node-memwatch : detect and find memory leaks in Node.JS code. Check this tutorial Tracking Down Memory Leaks in Node.js
Try this :
ImageIcon imageIcon = new ImageIcon("./img/imageName.png"); // load the image to a imageIcon
Image image = imageIcon.getImage(); // transform it
Image newimg = image.getScaledInstance(120, 120, java.awt.Image.SCALE_SMOOTH); // scale it the smooth way
imageIcon = new ImageIcon(newimg); // transform it back
(found it here)
It is called the Conditional Operator (which is a ternary operator).
It has the form of: condition
? value-if-true
: value-if-false
Think of the ?
as "then" and :
as "else".
Your code is equivalent to
if (max != 0)
hsb.s = 255 * delta / max;
else
hsb.s = 0;
Pros
%1
, %2
, ... %*
in tact/arg
and -arg
styleCons
setlocal
for local scoping or write an accompanying :CLEAR-ARGS
routine!--force
to -f
)""
argument supportHere is an example how the following arguments relate to .bat variables:
>> testargs.bat /b 3 -c /d /e /f /g /h /i /j /k /bar 5 /foo "c:\"
echo %* | /b 3 -c /d /e /f /g /h /i /j /k /bar 5 /foo "c:\"
echo %ARG_FOO% | c:\
echo %ARG_A% |
echo %ARG_B% | 3
echo %ARG_C% | 1
echo %ARG_D% | 1
@echo off
setlocal
CALL :ARG-PARSER %*
::Print examples
echo: ALL: %*
echo: FOO: %ARG_FOO%
echo: A: %ARG_A%
echo: B: %ARG_B%
echo: C: %ARG_C%
echo: D: %ARG_D%
::*********************************************************
:: Parse commandline arguments into sane variables
:: See the following scenario as usage example:
:: >> thisfile.bat /a /b "c:\" /c /foo 5
:: >> CALL :ARG-PARSER %*
:: ARG_a=1
:: ARG_b=c:\
:: ARG_c=1
:: ARG_foo=5
::*********************************************************
:ARG-PARSER
::Loop until two consecutive empty args
:loopargs
IF "%~1%~2" EQU "" GOTO :EOF
set "arg1=%~1"
set "arg2=%~2"
shift
::Allow either / or -
set "tst1=%arg1:-=/%"
if "%arg1%" NEQ "" (
set "tst1=%tst1:~0,1%"
) ELSE (
set "tst1="
)
set "tst2=%arg2:-=/%"
if "%arg2%" NEQ "" (
set "tst2=%tst2:~0,1%"
) ELSE (
set "tst2="
)
::Capture assignments (eg. /foo bar)
IF "%tst1%" EQU "/" IF "%tst2%" NEQ "/" IF "%tst2%" NEQ "" (
set "ARG_%arg1:~1%=%arg2%"
GOTO loopargs
)
::Capture flags (eg. /foo)
IF "%tst1%" EQU "/" (
set "ARG_%arg1:~1%=1"
GOTO loopargs
)
goto loopargs
GOTO :EOF
The best way to avoid this kind of issues it to build properties programmatically and then store them. For example, using code like this:
java.util.Properties props = new java.util.Properties();
props.setProperty("table.whereclause", "where id=100");
props.store(System.out, null);
This would output to System.out the properly escaped version.
In my case the output was:
#Mon Aug 12 13:50:56 EEST 2013
table.whereclause=where id\=100
As you can see, this is an easy way to generate content of .properties files that's guaranteed to be correct. And you can put as many properties as you want.
If you want to build DOM you can use jsdom.
There's also cheerio, it has the jQuery interface and it's a lot faster than older versions of jsdom, although these days they are similar in performance.
You might wanna have a look at htmlparser2, which is a streaming parser, and according to its benchmark, it seems to be faster than others, and no DOM by default. It can also produce a DOM, as it is also bundled with a handler that creates a DOM. This is the parser that is used by cheerio.
parse5 also looks like a good solution. It's fairly active (11 days since the last commit as of this update), WHATWG-compliant, and is used in jsdom, Angular, and Polymer.
And if you want to parse HTML for web scraping, you can use YQL1. There is a node module for it. YQL I think would be the best solution if your HTML is from a static website, since you are relying on a service, not your own code and processing power. Though note that it won't work if the page is disallowed by the robot.txt of the website, YQL won't work with it.
If the website you're trying to scrape is dynamic then you should be using a headless browser like phantomjs. Also have a look at casperjs, if you're considering phantomjs. And you can control casperjs from node with SpookyJS.
Beside phantomjs there's zombiejs. Unlike phantomjs that cannot be embedded in nodejs, zombiejs is just a node module.
There's a nettuts+ toturial for the latter solutions.
1 Since Aug. 2014, YUI library, which is a requirement for YQL, is no longer actively maintained, source
TagLib Sharp has support for reading ID3 tags.
You can strip non-digits and do a comparison. Here's a demo script:
for num in "44" "-44" "44-" "4-4" "a4" "4a" ".4" "4.4" "-4.4" "09"
do
match=${num//[^[:digit:]]} # strip non-digits
match=${match#0*} # strip leading zeros
echo -en "$num\t$match\t"
case $num in
$match|-$match) echo "Integer";;
*) echo "Not integer";;
esac
done
This is what the test output looks like:
44 44 Integer -44 44 Integer 44- 44 Not integer 4-4 44 Not integer a4 4 Not integer 4a 4 Not integer .4 4 Not integer 4.4 44 Not integer -4.4 44 Not integer 09 9 Not integer
You can use form.get to get the specific control object and use setValue
this.form.get(<formControlName>).setValue(<newValue>);
I've been trying to do this for a while. Here is a script that changes to the same working directory, runs the command, and closes the terminal window.
#!/bin/sh
osascript <<END
tell application "Terminal"
do script "cd \"`pwd`\";$1;exit"
end tell
END
I second Dave's idea. I'm not always fond of pivot tables, but in this case they are pretty straightforward to use.
Here are my results:
It was so simple to create it that I have even recorded a macro in case you need to do this with VBA:
Sub Macro2()
'
' Macro2 Macro
'
'
Range("Table1[[#All],[DATA]]").Select
ActiveWorkbook.PivotCaches.Create(SourceType:=xlDatabase, SourceData:= _
"Table1", Version:=xlPivotTableVersion14).CreatePivotTable TableDestination _
:="Sheet3!R3C7", TableName:="PivotTable4", DefaultVersion:= _
xlPivotTableVersion14
Sheets("Sheet3").Select
Cells(3, 7).Select
With ActiveSheet.PivotTables("PivotTable4").PivotFields("DATA")
.Orientation = xlRowField
.Position = 1
End With
ActiveSheet.PivotTables("PivotTable4").AddDataField ActiveSheet.PivotTables( _
"PivotTable4").PivotFields("DATA"), "Count of DATA", xlCount
End Sub
GitHub has a nice section called "Dealing with “non-fast-forward” errors"
This error can be a bit overwhelming at first, do not fear.
Simply put, git cannot make the change on the remote without losing commits, so it refuses the push.
Usually this is caused by another user pushing to the same branch. You can remedy this by fetching and merging the remote branch, or using pull to perform both at once.In other cases this error is a result of destructive changes made locally by using commands like
git commit --amend
orgit rebase
.
While you can override the remote by adding--force
to thepush
command, you should only do so if you are absolutely certain this is what you want to do.
Force-pushes can cause issues for other users that have fetched the remote branch, and is considered bad practice. When in doubt, don’t force-push.
Git cannot make changes on the remote like a fast-forward merge, which a Visual Git Reference illustrates like:
This is not exactly your case, but helps to see what "fast-forward" is (where the HEAD
of a branch is simply moved to a new more recent commit).
The "branch master->master (non-fast-forward) Already-up-to-date
" is usually for local branches which don't track their remote counter-part.
See for instance this SO question "git pull says up-to-date but git push rejects non-fast forward".
Or the two branches are connected, but in disagreement with their respective history:
See "Never-ending GIT story - what am I doing wrong here?"
This means that your subversion branch and your remote git master branch do not agree on something.
Some change was pushed/committed to one that is not in the other.
Fire upgitk --all
, and it should give you a clue as to what went wrong - look for "forks" in the history.
def longestincrsub(arr1):
n=len(arr1)
l=[1]*n
for i in range(0,n):
for j in range(0,i) :
if arr1[j]<arr1[i] and l[i]<l[j] + 1:
l[i] =l[j] + 1
l.sort()
return l[-1]
arr1=[10,22,9,33,21,50,41,60]
a=longestincrsub(arr1)
print(a)
even though there is a way by which you can solve this in O(nlogn) time(this solves in O(n^2) time) but still this way gives the dynamic programming approach which is also good .
I had the same problem. My fix was to add headers to my PHP script which are present only when in dev environment.
This allows cross-domain requests:
header("Access-Control-Allow-Origin: *");
This tells the preflight request that it is OK for the client to send any headers it wants:
header("Access-Control-Allow-Headers: *");
This way there is no need to modify the request.
If you have sensitive data in your dev database that might potentially be leaked, then you might think twice about this.
I know it is not Dictionary<TKey, TValue>
class, however you can avoid KeyNotFoundException
while incrementing a value like:
dictionary[key]++; // throws `KeyNotFoundException` if there is no such key
by using ConcurrentDictionary<TKey, TValue> and its really nice method AddOrUpdate()..
Let me show an example:
var str = "Hellooo!!!";
var characters = new ConcurrentDictionary<char, int>();
foreach (var ch in str)
characters.AddOrUpdate(ch, 1, (k, v) => v + 1);
I fixed this error in my deployment. It only occured for me if I had run the installer once before. As soon as you start the Installer, it will create a temporary folder. Copy that folder and save it off with a different name. Now cancel that install.
Open Regedit and search (CTRL+F) for "AppFabric". You should find an entry under HKEY_CLASSES_ROOT\Installer\Products{SomeStringOfCharacters}. Under that check SourceList it will have a Key called LastUsedSource. Update the folder path within it to match the temporary folder we just saved off. Also check SourceList/Net. It will likely have multiple keys with numeric Names. Make sure the Data value for them match your temporary folder path as well.
Now go into your temporary folder and run Setup.exe. It should complete now. I've seen behavior like this with other installers that first extract files to a temporary folder. Re-running the installer mostly works from the new temporary folder but some aspect of it holds on to the old temporary folder in the registry and tries to load something up from the old location.
Just because the bean injected into the controller is prototype-scoped doesn't mean the controller is!
An interrupt is an indication to a thread that it should stop what it is doing and do something else. It's up to the programmer to decide exactly how a thread responds to an interrupt, but it is very common for the thread to terminate. A very good referance: https://docs.oracle.com/javase/tutorial/essential/concurrency/interrupt.html
you can use "Line1<br>Line2"
#Ask for number input
first = int(raw_input('Please type a number: '))
second = int(raw_input('Please type a number: '))
third = int(raw_input('Please type a number: '))
fourth = int(raw_input('Please type a number: '))
fifth = int(raw_input('Please type a number: '))
sixth = int(raw_input('Please type a number: '))
seventh = int(raw_input('Please type a number: '))
eighth = int(raw_input('Please type a number: '))
ninth = int(raw_input('Please type a number: '))
tenth = int(raw_input('Please type a number: '))
#create a list for variables
sorted_list = [first, second, third, fourth, fifth, sixth, seventh,
eighth, ninth, tenth]
odd_numbers = []
#filter list and add odd numbers to new list
for value in sorted_list:
if value%2 != 0:
odd_numbers.append(value)
print 'The greatest odd number you typed was:', max(odd_numbers)
You can also do the following;
string json = myJObject.ToString(Newtonsoft.Json.Formatting.None);
ResultSet rsTst = hiSession.connection().prepareStatement(queryStr).executeQuery();
ResultSetMetaData meta = rsTst.getMetaData();
int columnCount = meta.getColumnCount();
// The column count starts from 1
String nameValuePair = "";
while (rsTst.next()) {
for (int i = 1; i < columnCount + 1; i++ ) {
String name = meta.getColumnName(i);
// Do stuff with name
String value = rsTst.getString(i); //.getObject(1);
nameValuePair = nameValuePair + name + "=" +value + ",";
//nameValuePair = nameValuePair + ", ";
}
nameValuePair = nameValuePair+"||" + "\t";
}
Slightly off-topic to your question, but it's probably worth mentioning anyway:
Commons Lang has got some excellent methods you can use in overriding equals and hashcode. Check out EqualsBuilder.reflectionEquals(...) and HashCodeBuilder.reflectionHashCode(...). Saved me plenty of headache in the past - although of course if you just want to do "equals" on ID it may not fit your circumstances.
I also agree that you should use the @Override
annotation whenever you're overriding equals (or any other method).
Your program should work exactly the same with either import java.util.*; or import java.util.Date;. There has to be something else you did in between.
For performance issue, first data is to be written into Buffer. When buffer get full then data is written to output (File,console etc.). When buffer is partially filled and you want to send it to output(file,console) then you need to call flush() method manually in order to write partially filled buffer to output(file,console).
I finally found a solution. I wasted hours just trying to figure what this issue was. I tried deleting all those files suggested above and it didn't work for me, I tried adding new inbound rules to firewall for myslqd.exe and it didn't work. The thing that is causing this error is MySQL port is misconfigured and the fix was really simple. if you are using Wamp or Xampp go to Main Folder/Bin/mysql/mysql/ and find a file named my.ini
Open my.ini file press CTRL + F and inside it search for PORT and change whatever value of port to - 3306 and save file;
After that go to Wamp icon at the bottom of the taskbar (system tray) and left click choose mysql option and click "test port 3306 used" and see if it gives you any error. you can also click use other port other than whatever is shown there and port 3306.
Goodluck. if it works comment.
There are much more hexeditors on Linux/Unix....
I use hexedit on Ubuntu
sudo apt-get install hexedit
Expand your database, expand your table right click on your table and select design from dropdown.
Now go Column properties below of it scroll down and find Identity Specification, expand it and you will find Is Identity make it Yes. Now choose Identity Increment right below of it give the value you want to increment in it.
Just use the change directory (cd) command.
cd d:\windows\movie
Yes, you must open php.ini
and remove the semicolon to:
;extension=php_openssl.dll
If you don't have that line, check that you have the file (In my PC is on D:\xampp\php\ext
) and add this to php.ini
in the "Dynamic Extensions" section:
extension=php_openssl.dll
Things have changed for PHP > 7. This is what i had to do for PHP 7.2.
Step: 1: Uncomment extension=openssl
Step: 2: Uncomment extension_dir = "ext"
Step: 3: Restart xampp.
Done.
Explanation: ( From php.ini )
If you wish to have an extension loaded automatically, use the following syntax:
extension=modulename
Note : The syntax used in previous PHP versions (extension=<ext>.so
and extension='php_<ext>.dll
) is supported for legacy reasons and may be deprecated in a future PHP major version. So, when it is possible, please move to the new (extension=<ext>
) syntax.
Special Note: Be sure to appropriately set the extension_dir
directive.
As a follow-up to this question - since it relates specifically to creation time and discusses obtaining it via the new nio classes - it seems right now in JDK7's implementation you're out of luck. Addendum: same behaviour is in OpenJDK7.
On Unix filesystems you cannot retrieve the creation timestamp, you simply get a copy of the last modification time. So sad, but unfortunately true. I'm not sure why that is but the code specifically does that as the following will demonstrate.
import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.*;
public class TestFA {
static void getAttributes(String pathStr) throws IOException {
Path p = Paths.get(pathStr);
BasicFileAttributes view
= Files.getFileAttributeView(p, BasicFileAttributeView.class)
.readAttributes();
System.out.println(view.creationTime()+" is the same as "+view.lastModifiedTime());
}
public static void main(String[] args) throws IOException {
for (String s : args) {
getAttributes(s);
}
}
}
There are several C sorting functions available in stdlib.h
. You can do man 3 qsort
on a unix machine to get a listing of them but they include:
My solution:
function addLeadingChars(string, nrOfChars, leadingChar) {
string = string + '';
return Array(Math.max(0, (nrOfChars || 2) - string.length + 1)).join(leadingChar || '0') + string;
}
Usage:
var
date = new Date(),
month = addLeadingChars(date.getMonth() + 1),
day = addLeadingChars(date.getDate());
jsfiddle: http://jsfiddle.net/8xy4Q/1/
According to : https://stackoverflow.com/a/24403519/365229
This should work, with plain Javascript:
var myVideo = document.getElementById('myVideoTag'); myVideo.play(); if (typeof(myVideo.webkitEnterFullscreen) != "undefined") { // This is for Android Stock. myVideo.webkitEnterFullscreen(); } else if (typeof(myVideo.webkitRequestFullscreen) != "undefined") { // This is for Chrome. myVideo.webkitRequestFullscreen(); } else if (typeof(myVideo.mozRequestFullScreen) != "undefined") { myVideo.mozRequestFullScreen(); }
You have to trigger play() before the fullscreen instruction, otherwise in Android Browser it will just go fullscreen but it will not start playing. Tested with the latest version of Android Browser, Chrome, Safari.
I've tested it on Android 2.3.3 & 4.4 browser.
if is it is not showing at all, the reason is that you need two @ sign:
@@class
BUT, I believe you might need to have the active class on the "li" tag not on the "a" tag. according too bootstrap docs (http://getbootstrap.com/components/#navbar-default):
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">Profile</a></li>
<li><a href="#">Messages</a></li>
</ul>
therefore your code will be:
<ul class="nav navbar-nav">
<li class="active">@Html.ActionLink("Home", "Index", "Home", null)</li>
<li>@Html.ActionLink("About", "About", "Home")</li>
<li>@Html.ActionLink("Contact", "Contact", "Home")</li>
</ul>
For any OS X users and future me, you also need to set GOBIN
to avoid this confusing message on install and go get
mkdir bin
export GOBIN=$GOPATH/bin
If you don't want to use Metadata you can use a [UIHint("PeriodType")]
attribute to decorate the property or if its a complex type you don't have to decorate anything. EditorFor will then look for a PeriodType.aspx or ascx file in the EditorTemplates folder and use that instead.
First store the table in a view, then select columns from that view into a new table.
// Create a table with abitrary columns for use with the example
System.Data.DataTable table = new System.Data.DataTable();
for (int i = 1; i <= 11; i++)
table.Columns.Add("col" + i.ToString());
// Load the table with contrived data
for (int i = 0; i < 100; i++)
{
System.Data.DataRow row = table.NewRow();
for (int j = 0; j < 11; j++)
row[j] = i.ToString() + ", " + j.ToString();
table.Rows.Add(row);
}
// Create the DataView of the DataTable
System.Data.DataView view = new System.Data.DataView(table);
// Create a new DataTable from the DataView with just the columns desired - and in the order desired
System.Data.DataTable selected = view.ToTable("Selected", false, "col1", "col2", "col6", "col7", "col3");
Used the sample data to test this method I found: Create ADO.NET DataView showing only selected Columns
Boolean
wrapper is useful when you want to whether value was assigned or not apart from true
and false
. It has the following three states:
null
Whereas boolean
has only two states:
The above difference will make it helpful in Lists of Boolean
values, which can have True
, False
or Null
.
Done
I got same error everything was correct only i was using same statement interface object to execute and update the database. After separating i.e. using different objects of statement interface for updating and executing query i resolved this error. i.e. do get rid from this do not use same statement object for both updating and executing the query.
Don't forget to have the standard css declarations above the media query or the query won't work either.
.edcar_letter{
font-size:180px;
}
@media screen and (max-width: 350px) {
.edcar_letter{
font-size:120px;
}
}
I've seen many suggestions to use the win32 module, but Tkinter provides the shortest and easiest method I've seen, as in this post: How do I copy a string to the clipboard on Windows using Python?
Plus, Tkinter is in the python standard library.
For the best practice - use style="display:"
it will work every where..
To follow up on @MrSnowflake answer with a code example.
This is the XABBER now open source Application
class. The Application
class is centralising and coordinating Listeners
and ManagerInterfaces and more. Managers of all sorts are dynamically loaded. Activity´s
started in the Xabber will report in what type of Listener
they are. And when a Service
start it report in to the Application
class as started. Now to send a message to an Activity
all you have to do is make your Activity
become a listener
of what type you need. In the OnStart()
OnPause()
register/unreg. The Service
can ask the Application
class for just that listener
it need to speak to and if it's there then the Activity is ready to receive.
Going through the Application
class you'll see there's a loot more going on then this.
I came across with the same issue. But I believe , handling null in the sql is not a good option. such things should be handled in java program for better performance. secondly , rs.getString("column") != NULL is also not a good option as you are comparing string's reference not value. better to use .equals() method while checking null or isEmpty() method. Again, with this you can use null check, that is fine.
DLL Export Viewer by NirSoft can be used to display exported functions in a DLL.
This utility displays the list of all exported functions and their virtual memory addresses for the specified DLL files. You can easily copy the memory address of the desired function, paste it into your debugger, and set a breakpoint for this memory address. When this function is called, the debugger will stop in the beginning of this function.
An update to this answer for Swift
buttonObj.sendActionsForControlEvents(.TouchUpInside)
EDIT: Updated for Swift 3
buttonObj.sendActions(for: .touchUpInside)
I would suggest to use a variable instead of a public field:
public class Variables
{
private static string name = "";
public static string Name
{
get { return name; }
set { name = value; }
}
}
From another class, you call your variable like this:
public class Main
{
public void DoSomething()
{
string var = Variables.Name;
}
}
You can auto generate Image map from this website for selected area of image. https://www.image-map.net/
Easiest way to execute!
If you have only one thread modifying your boolean, you can use a volatile boolean (usually you do this to define a stop
variable checked in the thread's main loop).
However, if you have multiple threads modifying the boolean, you should use an AtomicBoolean
. Else, the following code is not safe:
boolean r = !myVolatileBoolean;
This operation is done in two steps:
If an other thread modify the value between #1
and 2#
, you might got a wrong result. AtomicBoolean
methods avoid this problem by doing steps #1
and #2
atomically.
int days = 1;
var newDate = new Date(Date.now() + days*24*60*60*1000);
var days = 2;_x000D_
var newDate = new Date(Date.now()+days*24*60*60*1000);_x000D_
_x000D_
document.write('Today: <em>');_x000D_
document.write(new Date());_x000D_
document.write('</em><br/> New: <strong>');_x000D_
document.write(newDate);
_x000D_
The return type depends on the server, sometimes the response is indeed a JSON array but sent as text/plain
Setting the accept headers in the request should get the correct type:
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
which can then be serialized to a JSON list or array. Thanks for the comment from @svick which made me curious that it should work.
The Exception I got without configuring the accept headers was System.Net.Http.UnsupportedMediaTypeException.
Following code is cleaner and should work (untested, but works in my case):
var client = new HttpClient();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var response = await client.GetAsync("http://api.usa.gov/jobs/search.json?query=nursing+jobs");
var model = await response.Content.ReadAsAsync<List<Job>>();
FULL is probably referring to a full table scan, which means that no indexes are in use. This is usually indicating that something is wrong, unless the query is supposed to use all the rows in a table.
Cost is a number that signals the sum of the different loads, processor, memory, disk, IO, and high numbers are typically bad. The numbers are added up when moving to the root of the plan, and each branch should be examined to locate the bottlenecks.
You may also want to query v$sql and v$session to get statistics about SQL statements, and this will have detailed metrics for all kind of resources, timings and executions.
You can overwrite the bootstrap colors, including the .navbar-inner
class, by targetting it in your own stylesheet as opposed to modifying the bootstrap.css stylesheet, like so:
.navbar-inner {
background-color: #2c2c2c; /* fallback color, place your own */
/* Gradients for modern browsers, replace as you see fit */
background-image: -moz-linear-gradient(top, #333333, #222222);
background-image: -ms-linear-gradient(top, #333333, #222222);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#333333), to(#222222));
background-image: -webkit-linear-gradient(top, #333333, #222222);
background-image: -o-linear-gradient(top, #333333, #222222);
background-image: linear-gradient(top, #333333, #222222);
background-repeat: repeat-x;
/* IE8-9 gradient filter */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#333333', endColorstr='#222222', GradientType=0);
}
You just have to modify all of those styles with your own and they will get picked up, like something like this for example, where i eliminate all gradient effects and just set a solid black background-color:
.navbar-inner {
background-color: #000; /* background color will be black for all browsers */
background-image: none;
background-repeat: no-repeat;
filter: none;
}
You can take advantage of such tools as the Colorzilla Gradient Editor and create your own gradient colors for all browsers and replace the original colors with your own.
And as i mentioned on the comments, i would not recommend you modifying the bootstrap.css stylesheet directly as all of your changes will be lost once the stylesheet gets updated (current version is v2.0.2) so it is preferred that you include all of your changes inside your own stylesheet, in tandem with the bootstrap.css stylesheet. But remember to overwrite all of the appropriate properties to have consistency across browsers.
Update:
The plugin previously mentioned has been abandoned, but it apparently has an up-to-date fork here.
Old Answer:
I use the Android Studio plugin named Android Drawable Importer
:
To use it after installed, right click your res/drawable folder and select New > Batch Drawable Import
:
Then select your image via the +
button and set the Resolution to be xxhdpi (or whatever the resolution of your source image is).
And what about:
read -p "Press enter to continue"
You can use this code:
This example takes a backup of sugarcrm database and dumps the output to sugarcrm.sql
# mysqldump -u root -ptmppassword sugarcrm > sugarcrm.sql
# mysqldump -u root -p[root_password] [database_name] > dumpfilename.sql
The sugarcrm.sql will contain drop table, create table and insert command for all the tables in the sugarcrm database. Following is a partial output of sugarcrm.sql, showing the dump information of accounts_contacts table:
--
accounts_contacts
DROP TABLE IF EXISTS `accounts_contacts`;
SET @saved_cs_client = @@character_set_client;
SET character_set_client = utf8;
CREATE TABLE `accounts_contacts` (
`id` varchar(36) NOT NULL,
`contact_id` varchar(36) default NULL,
`account_id` varchar(36) default NULL,
`date_modified` datetime default NULL,
`deleted` tinyint(1) NOT NULL default '0',
PRIMARY KEY (`id`),
KEY `idx_account_contact` (`account_id`,`contact_id`),
KEY `idx_contid_del_accid` (`contact_id`,`deleted`,`account_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
SET character_set_client = @saved_cs_client;
--
jQuery UI draggable and droppable are the two plugins I would use to achieve this effect. As for the insertion marker, I would investigate modifying the div
(or container) element that was about to have content dropped into it. It should be possible to modify the border in some way or add a JavaScript/jQuery listener that listens for the hover (element about to be dropped) event and modifies the border or adds an image of the insertion marker in the right place.
I was running into the same issue. I discovered the following solution, which has only been tested in Chrome v31:
table {
table-layout: fixed;
}
tbody {
display: block;
overflow: scroll;
}
First off, are you setting your desired JRE or your desired JDK?
Even if your Eclipse is set up properly, there might be a wacky project-specific setting somewhere. You can open up a context menu on a given Java project in the Project Explorer and select Properties > Java Compiler to check on that.
If none of that helps, leave a comment and I'll take another look.
Don't forget that endianness is not the whole story - the size of char
might not be 8 bits (e.g. DSP's), two's complement negation is not guaranteed (e.g. Cray), strict alignment might be required (e.g. SPARC, also ARM springs into middle-endian when unaligned), etc, etc.
It might be a better idea to target a specific CPU architecture instead.
For example:
#if defined(__i386__) || defined(_M_IX86) || defined(_M_IX64)
#define USE_LITTLE_ENDIAN_IMPL
#endif
void my_func()
{
#ifdef USE_LITTLE_ENDIAN_IMPL
// Intel x86-optimized, LE implementation
#else
// slow but safe implementation
#endif
}
Note that this solution is also not ultra-portable unfortunately, as it depends on compiler-specific definitions (there is no standard, but here's a nice compilation of such definitions).
Try this:
var date = new Date();
console.log(date instanceof Date && !isNaN(date.valueOf()));
This should return true
.
UPDATED: Added isNaN
check to handle the case commented by Julian H. Lam
As of Swift 4.1, if all you need is just check whether the code is built with debug or release configuration, you may use the built-in functions:
_isDebugAssertConfiguration()
(true when optimization is set to -Onone
)_isReleaseAssertConfiguration()
(true when optimization is set to -O
)_isFastAssertConfiguration()
(true when optimization is set to -Ounchecked
)e.g.
func obtain() -> AbstractThing {
if _isDebugAssertConfiguration() {
return DecoratedThingWithDebugInformation(Thing())
} else {
return Thing()
}
}
Compared with preprocessor macros,
-D DEBUG
flag to use it? Undocumented, which means the function can be removed in any update (but it should be AppStore-safe since the optimizer will turn these into constants)
@testable
attribute, fate uncertain on future Swift.? Using in if/else will always generate a "Will never be executed" warning.
I believe that although javascript is an option here, you have a smoother animation through forcing hardware accelerate with CSS3. You can achieve this by setting the following CSS3 properties on the moving div:
div.hardware-accelarate {
-webkit-transform: translate3d(0,0,0);
-moz-transform: translate3d(0,0,0);
-ms-transform: translate3d(0,0,0);
-o-transform: translate3d(0,0,0);
transform: translate3d(0,0,0);
}
I've made a plunkr setup for ya'll to test and tweak...
The Rob Evans anwser works correctly for me but when I use request.abort(), it occurs to throw a socket hang up error which stays unhandled.
I had to add an error handler for the request object :
var options = { ... }
var req = http.request(options, function(res) {
// Usual stuff: on(data), on(end), chunks, etc...
}
req.on('socket', function (socket) {
socket.setTimeout(myTimeout);
socket.on('timeout', function() {
req.abort();
});
}
req.on('error', function(err) {
if (err.code === "ECONNRESET") {
console.log("Timeout occurs");
//specific error treatment
}
//other error treatment
});
req.write('something');
req.end();
One difference is that in a DTD the content model of an element is completely determined by its name, independently of where it appears in the document:
Assuming you want to have
person
elementname
name
itself has child elements first
and last
. Like this
<person>
<name>
<first></first>
<last></last>
</name>
</person>
If a city
element in the same document also needs to have a child element 'name' the DTD requires that this 'name' element must have child elements first
and last
as well. Despite the fact that city.name
does not require first
and last
as children.
In contrast, XML Schema allows you to declare child element types locally; you could declare the name
child elements for both person
and city
separately. Thus giving them their proper content models in those contexts.
The other major difference is support for namespaces. Since DTDs are part of the original XML specification (and inherited from SGML), they are not namespace-aware at all because XML namespaces were specified later. You can use DTDs in combination with namespaces, but it requires some contortions, like being forced to define the prefixes in the DTD and using only those prefixes, instead of being able to use arbitrary prefixes.
To me, other differences are mostly superficial. Datatype support could easily be added to DTDs, and syntax is just syntax. (I, for one, find the XML Schema syntax horrible and would never want to hand-maintain an XML Schema, which I wouldn't say about DTDs or RELAX NG schemas; if I need an XML Schema for some reason, I usually write a RELAX NG one and convert it with trang
.)
in your tsconfig you have to add: "esModuleInterop": true - it should help.
var str = "43215";
console.log("Before : \n string :"+str+"\n Length :"+str.length);
var max = 9;
while(str.length < max ){
str = "0" + str;
}
console.log("After : \n string :"+str+"\n Length :"+str.length);
It worked for me ! To increase the zeroes, update the 'max' variable
Working Fiddle URL : Adding extra zeros in front of a number using jQuery?:
Looks like the answer above was a little incomplete try the following:-
=RIGHT(A2,(LEN(A2)-(LEN(A2)-1)))
Obviously, this is for cell A2...
What this does is uses a combination of Right and Len - Len is the length of a string and in this case, we want to remove all but one from that... clearly, if you wanted the last two characters you'd change the -1 to -2 etc etc etc.
After the length has been determined and the portion of that which is required - then the Right command will display the information you need.
This works well combined with an IF statement - I use this to find out if the last character of a string of text is a specific character and remove it if it is. See, the example below for stripping out commas from the end of a text string...
=IF(RIGHT(A2,(LEN(A2)-(LEN(A2)-1)))=",",LEFT(A2,(LEN(A2)-1)),A2)
In Azure Data warehouse also this occurs sometimes, because temporary tables created for a user session.. I got the same issue fixed by reconnecting the database,
Here is an example:
I've an Order table with a DateTime field called OrderDate. I want to retrieve all orders where the order date is equals to 01/01/2006. there are next ways to do it:
1) WHERE DateDiff(dd, OrderDate, '01/01/2006') = 0
2) WHERE Convert(varchar(20), OrderDate, 101) = '01/01/2006'
3) WHERE Year(OrderDate) = 2006 AND Month(OrderDate) = 1 and Day(OrderDate)=1
4) WHERE OrderDate LIKE '01/01/2006%'
5) WHERE OrderDate >= '01/01/2006' AND OrderDate < '01/02/2006'
Is found here
In Visual Basic, you can call a parameterless method without the braces (()
). In C#, they're mandatory. So you should write:
String guid = System.Guid.NewGuid().ToString();
Without the braces, you're assigning the method itself (instead of its result) to the variable guid
, and obviously the method cannot be converted to a String
, hence the error.
Check tis article on Partial Key Verification which covers the following requirements:
License keys must be easy enough to type in.
We must be able to blacklist (revoke) a license key in the case of chargebacks or purchases with stolen credit cards.
No “phoning home” to test keys. Although this practice is becoming more and more prevalent, I still do not appreciate it as a user, so will not ask my users to put up with it.
It should not be possible for a cracker to disassemble our released application and produce a working “keygen” from it. This means that our application will not fully test a key for verification. Only some of the key is to be tested. Further, each release of the application should test a different portion of the key, so that a phony key based on an earlier release will not work on a later release of our software.
Important: it should not be possible for a legitimate user to accidentally type in an invalid key that will appear to work but fail on a future version due to a typographical error.
There are a couple of ways to do that. I normally fall back to just using something like this:
long start = System.currentTimeMillis();
// ... do something ...
long end = System.currentTimeMillis();
or the same thing with System.nanoTime();
For something more on the benchmarking side of things there seems also to be this one: http://jetm.void.fm/ Never tried it though.
Because the compiler knows the binding at compile time. If you invoke a method on an interface, for example, then the compiler can't know and the binding is resolved at runtime because the actual object having a method invoked on it could possible be one of several. Therefore that is runtime or dynamic binding.
Your invocation is bound to the Animal class at compile time because you've specified the type. If you passed that variable into another method somewhere else, noone would know (apart from you because you wrote it) what actual class it would be. The only clue is the declared type of Animal.
@CMS's answer is just fine, but I want to note that you can use this package: https://github.com/sindresorhus/slugify, which does it for you and covers many edge cases (i.e., German umlauts, Vietnamese, Arabic, Russian, Romanian, Turkish, etc.).
malloc()
(and its friends free()
and realloc()
) is the way to do this in C.
This is because Oracle internally changes empty string to NULL values. Oracle simply won't let insert an empty string.
On the other hand, SQL Server would let you do what you are trying to achieve.
There are 2 workarounds here:
Both are, of course, stupid workarounds :)
The code below gives the HEX and RGB value of the range whether formatted using conditional formatting or otherwise. If the range is not formatted using Conditional Formatting and you intend to use iColor function in the Excel as UDF. It won't work. Read the below excerpt from MSDN.
Note that the DisplayFormat property does not work in user defined functions. For example, in a worksheet function that returns the interior color of a cell, if you use a line similar to:
Range.DisplayFormat.Interior.ColorIndex
then the worksheet function executes to return a #VALUE! error. If you are not finding color of the conditionally formatted range, then I encourage you to rather use
Range.Interior.ColorIndex
as then the function can also be used as UDF in Excel. Such as iColor(B1,"HEX")
Public Function iColor(rng As Range, Optional formatType As String) As Variant
'formatType: Hex for #RRGGBB, RGB for (R, G, B) and IDX for VBA Color Index
Dim colorVal As Variant
colorVal = rng.DisplayFormat.Interior.Color
Select Case UCase(formatType)
Case "HEX"
iColor = "#" & Format(Hex(colorVal Mod 256),"00") & _
Format(Hex((colorVal \ 256) Mod 256),"00") & _
Format(Hex((colorVal \ 65536)),"00")
Case "RGB"
iColor = Format((colorVal Mod 256),"00") & ", " & _
Format(((colorVal \ 256) Mod 256),"00") & ", " & _
Format((colorVal \ 65536),"00")
Case "IDX"
iColor = rng.Interior.ColorIndex
Case Else
iColor = colorVal
End Select
End Function
'Example use of the iColor function
Sub Get_Color_Format()
Dim rng As Range
For Each rng In Selection.Cells
rng.Offset(0, 1).Value = iColor(rng, "HEX")
rng.Offset(0, 2).Value = iColor(rng, "RGB")
Next
End Sub
you are almost there; you just need to give the reference to master; since you want to get the file from the master branch:
git checkout master -- filename
Note that the differences will be cached; so if you want to see the differences you obtained; use
git diff --cached
Making the "Copy Local" property True for the reference did it for me. Expand References, right-click on System.Net.Http and change the value of Copy Local property to True in the properties window. I'm using VS2019.
What are the backgrounds for a switch-case to not accept this operator?
Because case
requires constant expression as its value. And since an ||
expression is not a compile time constant, it is not allowed.
From JLS Section 14.11:
Switch label should have following syntax:
SwitchLabel:
case ConstantExpression :
case EnumConstantName :
default :
The reason behind allowing just constant expression with cases can be understood from the JVM Spec Section 3.10 - Compiling Switches:
Compilation of switch statements uses the tableswitch and lookupswitch instructions. The tableswitch instruction is used when the cases of the switch can be efficiently represented as indices into a table of target offsets. The default target of the switch is used if the value of the expression of the switch falls outside the range of valid indices.
So, for the cases label to be used by tableswitch
as a index into the table of target offsets, the value of the case should be known at compile time. That is only possible if the case value is a constant expression. And ||
expression will be evaluated at runtime, and the value will only be available at that time.
From the same JVM section, the following switch-case
:
switch (i) {
case 0: return 0;
case 1: return 1;
case 2: return 2;
default: return -1;
}
is compiled to:
0 iload_1 // Push local variable 1 (argument i)
1 tableswitch 0 to 2: // Valid indices are 0 through 2 (NOTICE This instruction?)
0: 28 // If i is 0, continue at 28
1: 30 // If i is 1, continue at 30
2: 32 // If i is 2, continue at 32
default:34 // Otherwise, continue at 34
28 iconst_0 // i was 0; push int constant 0...
29 ireturn // ...and return it
30 iconst_1 // i was 1; push int constant 1...
31 ireturn // ...and return it
32 iconst_2 // i was 2; push int constant 2...
33 ireturn // ...and return it
34 iconst_m1 // otherwise push int constant -1...
35 ireturn // ...and return it
So, if the case
value is not a constant expressions, compiler won't be able to index it into the table of instruction pointers, using tableswitch
instruction.
I wrote an article on topis how to [manually install curl on debian linu][1]x.
[1]: http://www.jasom.net/how-to-install-curl-command-manually-on-debian-linux. This is its shortcut:
And restart Apache. If you will have an error during point 6, try to run apt-get install build-essential.
Before sometime I also had the same problem. I have tried replacing the .dll
file but no result. After some debugging I found the solution.
I had this in my php.ini
file:
extension_dir = "ext"
And I'm getting mbstring extension missing
error. So I tried putting the full path for the extension directory and it works for me. like:
extension_dir = "C:\php\ext"
Hope this will help.
Cheers,
Try to use java.util.Arrays
. This module has a variety of useful methods that could be used related to Arrays.
Arrays.toString(your_array_here[]);
You can use it without casting such as:
select sum(`stuff`) as mySum from test;
Or cast it to decimal:
select sum(cast(`stuff` as decimal(4,2))) as mySum from test;
EDIT
For SQL Server, you can use:
select sum(cast(stuff as decimal(5,2))) as mySum from test;
I used a open source tool called HTMLParser before. It's designed to parse HTML in various ways and serves the purpose quite well. It can parse HTML as different treenode and you can easily use its API to get attributes out of the node. Check it out and see if this can help you.
Node is used to represent tags in general. Divided to 3 types:
Attribute Note: is node which inside its has attributes.
Exp: <p id=”123”></p>
Text Node: is node which between the opening and closing its have contian text content.
Exp: <p>Hello</p>
Element Node : is node which inside its has other tags.
Exp: <p><b></b></p>
Each node may be types simultaneously, not necessarily only of a single type.
Element is simply a element node.
This provides an answer for people who arrive at this Question that may want to link an editor other than vim.
The linked resource, by Github,is likely to be kept up to date, when editors are updated, even if answers on SO (including this one) are not.
Associating Text Editors with git
Github's post shows exactly what to type in to your command line for various editors, including the options/flags specific to each editor for it to work best with git.
Notepad++:
git config --global core.editor "'C:/Program Files (x86)/Notepad++/notepad++.exe' -multiInst -notabbar -nosession -noPlugin"
Sublime Text:
git config --global core.editor "'c:/Program Files/sublime text 3/subl.exe' -w"
Atom:
git config --global core.editor "atom --wait"
The commands above assume your editor has been installed in the default directory for a windows machine.
The commands basically add the text between double-quotes to .gitconfig
in your home directory.
On a windows machine home is likely to be C:\Users\your-user-name
, where your-user-name is your login name.
From the command line, you can reach this directory by typing in cd ~
.
for example, a command above would be add the following line under the [core]
section like so:
[core]
editor = 'C:/Program Files/sublime text 3/subl.exe' -w
If you have a different editor, just replace with the path to your editor, using either method above. (and hope no flags are needed for optimal usage.)
This might not be a popular option, but sometimes the scripts end up being distributed in various chunks, in that case I've found this to be a quick fix
if(window.onload != null){var f1 = window.onload;}
window.onload=function(){
//do something
if(f1!=null){f1();}
}
then somewhere else...
if(window.onload != null){var f2 = window.onload;}
window.onload=function(){
//do something else
if(f2!=null){f2();}
}
this will update the onload function and chain as needed
If you want to open any website first you need to import a module called "webbrowser". Then just use webbrowser.open() to open a website. e.g.
import webbrowser
webbrowser.open('https://yashprogrammer.wordpress.com/', new= 2)
Here's a set of properties i made that feel more intuitive to use than the built in stuff. The conditions are based off of the truth table supplied above by ahmd0.
<!-- truth table for installer varables (install vs uninstall vs repair vs upgrade) https://stackoverflow.com/a/17608049/1721136 -->
<SetProperty Id="_INSTALL" After="FindRelatedProducts" Value="1"><![CDATA[Installed="" AND PREVIOUSVERSIONSINSTALLED=""]]></SetProperty>
<SetProperty Id="_UNINSTALL" After="FindRelatedProducts" Value="1"><![CDATA[PREVIOUSVERSIONSINSTALLED="" AND REMOVE="ALL"]]></SetProperty>
<SetProperty Id="_CHANGE" After="FindRelatedProducts" Value="1"><![CDATA[Installed<>"" AND REINSTALL="" AND PREVIOUSVERSIONSINSTALLED<>"" AND REMOVE=""]]></SetProperty>
<SetProperty Id="_REPAIR" After="FindRelatedProducts" Value="1"><![CDATA[REINSTALL<>""]]></SetProperty>
<SetProperty Id="_UPGRADE" After="FindRelatedProducts" Value="1"><![CDATA[PREVIOUSVERSIONSINSTALLED<>"" ]]></SetProperty>
Here's some sample usage:
<Custom Action="CaptureExistingLocalSettingsValues" After="InstallInitialize">NOT _UNINSTALL</Custom>
<Custom Action="GetConfigXmlToPersistFromCmdLineArgs" After="InstallInitialize">_INSTALL OR _UPGRADE</Custom>
<Custom Action="ForgetProperties" Before="InstallFinalize">_UNINSTALL OR _UPGRADE</Custom>
<Custom Action="SetInstallCustomConfigSettingsArgs" Before="InstallCustomConfigSettings">NOT _UNINSTALL</Custom>
<Custom Action="InstallCustomConfigSettings" Before="InstallFinalize">NOT _UNINSTALL</Custom>
Issues:
It seems to me like the files run the same without that line.
If so, then perhaps you're running the Python program on Windows? Windows doesn't use that line—instead, it uses the file-name extension to run the program associated with the file extension.
However in 2011, a "Python launcher" was developed which (to some degree) mimics this Linux behaviour for Windows. This is limited just to choosing which Python interpreter is run — e.g. to select between Python 2 and Python 3 on a system where both are installed. The launcher is optionally installed as py.exe
by Python installation, and can be associated with .py
files so that the launcher will check that line and in turn launch the specified Python interpreter version.
C does not and never has had a native string type. By convention, the language uses arrays of char
terminated with a null char, i.e., with '\0'
. Functions and macros in the language's standard libraries provide support for the null-terminated character arrays, e.g., strlen iterates over an array of char
until it encounters a '\0'
character and strcpy copies from the source string until it encounters a '\0'
.
The use of null-terminated strings in C reflects the fact that C was intended to be only a little more high-level than assembly language. Zero-terminated strings were already directly supported at that time in assembly language for the PDP-10 and PDP-11.
It is worth noting that this property of C strings leads to quite a few nasty buffer overrun bugs, including serious security flaws. For example, if you forget to null-terminate a character string passed as the source argument to strcpy
, the function will keep copying sequential bytes from whatever happens to be in memory past the end of the source string until it happens to encounter a 0
, potentially overwriting whatever valuable information follows the destination string's location in memory.
In your code example, the string literal "Hello, world!" will be compiled into a 14-byte long array of char
. The first 13 bytes will hold the letters, comma, space, and exclamation mark and the final byte will hold the null-terminator character '\0'
, automatically added for you by the compiler. If you were to access the array's last element, you would find it equal to 0
. E.g.:
const char foo[] = "Hello, world!";
assert(foo[12] == '!');
assert(foo[13] == '\0');
However, in your example, message
is only 10 bytes long. strcpy
is going to write all 14 bytes, including the null-terminator, into memory starting at the address of message
. The first 10 bytes will be written into the memory allocated on the stack for message
and the remaining four bytes will simply be written on to the end of the stack. The consequence of writing those four extra bytes onto the stack is hard to predict in this case (in this simple example, it might not hurt a thing), but in real-world code it usually leads to corrupted data or memory access violation errors.
There are several key differences.
update
is used on a queryset, so it is possible to update multiple objects at once.
As @FallenAngel pointed out, there are differences in how custom save()
method triggers, but it is also important to keep in mind signals
and ModelManagers
. I have build a small testing app to show some valuable differencies. I am using Python 2.7.5, Django==1.7.7 and SQLite, note that the final SQLs may vary on different versions of Django and different database engines.
Ok, here's the example code.
models.py
:
from __future__ import print_function
from django.db import models
from django.db.models import signals
from django.db.models.signals import pre_save, post_save
from django.dispatch import receiver
__author__ = 'sobolevn'
class CustomManager(models.Manager):
def get_queryset(self):
super_query = super(models.Manager, self).get_queryset()
print('Manager is called', super_query)
return super_query
class ExtraObject(models.Model):
name = models.CharField(max_length=30)
def __unicode__(self):
return self.name
class TestModel(models.Model):
name = models.CharField(max_length=30)
key = models.ForeignKey('ExtraObject')
many = models.ManyToManyField('ExtraObject', related_name='extras')
objects = CustomManager()
def save(self, *args, **kwargs):
print('save() is called.')
super(TestModel, self).save(*args, **kwargs)
def __unicode__(self):
# Never do such things (access by foreing key) in real life,
# because it hits the database.
return u'{} {} {}'.format(self.name, self.key.name, self.many.count())
@receiver(pre_save, sender=TestModel)
@receiver(post_save, sender=TestModel)
def reicever(*args, **kwargs):
print('signal dispatched')
views.py
:
def index(request):
if request and request.method == 'GET':
from models import ExtraObject, TestModel
# Create exmple data if table is empty:
if TestModel.objects.count() == 0:
for i in range(15):
extra = ExtraObject.objects.create(name=str(i))
test = TestModel.objects.create(key=extra, name='test_%d' % i)
test.many.add(test)
print test
to_edit = TestModel.objects.get(id=1)
to_edit.name = 'edited_test'
to_edit.key = ExtraObject.objects.create(name='new_for')
to_edit.save()
new_key = ExtraObject.objects.create(name='new_for_update')
to_update = TestModel.objects.filter(id=2).update(name='updated_name', key=new_key)
# return any kind of HttpResponse
That resuled in these SQL queries:
# to_edit = TestModel.objects.get(id=1):
QUERY = u'SELECT "main_testmodel"."id", "main_testmodel"."name", "main_testmodel"."key_id"
FROM "main_testmodel"
WHERE "main_testmodel"."id" = %s LIMIT 21'
- PARAMS = (u'1',)
# to_edit.save():
QUERY = u'UPDATE "main_testmodel" SET "name" = %s, "key_id" = %s
WHERE "main_testmodel"."id" = %s'
- PARAMS = (u"'edited_test'", u'2', u'1')
# to_update = TestModel.objects.filter(id=2).update(name='updated_name', key=new_key):
QUERY = u'UPDATE "main_testmodel" SET "name" = %s, "key_id" = %s
WHERE "main_testmodel"."id" = %s'
- PARAMS = (u"'updated_name'", u'3', u'2')
We have just one query for update()
and two for save()
.
Next, lets talk about overriding save()
method. It is called only once for save()
method obviously. It is worth mentioning, that .objects.create()
also calls save()
method.
But update()
does not call save()
on models. And if no save()
method is called for update()
, so the signals are not triggered either. Output:
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
# TestModel.objects.get(id=1):
Manager is called [<TestModel: edited_test new_for 0>]
Manager is called [<TestModel: edited_test new_for 0>]
save() is called.
signal dispatched
signal dispatched
# to_update = TestModel.objects.filter(id=2).update(name='updated_name', key=new_key):
Manager is called [<TestModel: edited_test new_for 0>]
As you can see save()
triggers Manager
's get_queryset()
twice. When update()
only once.
Resolution. If you need to "silently" update your values, without save()
been called - use update
. Usecases: last_seen
user's field. When you need to update your model properly use save()
.
And Don't Forget To Change in Index.html Following Code :
<script src="http://192.168.1.4:8000/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery-1.6.2.min.js"></script>
var socket = io.connect('http://192.168.1.4:8000');
Good luck!
thisTag = _tags.FirstOrDefault(t => t.Key == tag);
is an inefficient and a little bit strange way to find something by key in a dictionary. Looking things up for a Key is the basic function of a Dictionary.
The basic solution would be:
if (_tags.Containskey(tag)) { string myValue = _tags[tag]; ... }
But that requires 2 lookups.
TryGetValue(key, out value)
is more concise and efficient, it only does 1 lookup. And that answers the last part of your question, the best way to do a lookup is:
string myValue;
if (_tags.TryGetValue(tag, out myValue)) { /* use myValue */ }
VS 2017 update, for C# 7 and beyond we can declare the result variable inline:
if (_tags.TryGetValue(tag, out string myValue))
{
// use myValue;
}
// use myValue, still in scope, null if not found
List<string> l = new List<string> { "@bob.com", "@tom.com" };
List<string> l2 = new List<string> { "[email protected]", "[email protected]" };
List<string> myboblist= (l2.Where (i=>i.Contains("bob")).ToList<string>());
foreach (var bob in myboblist)
Console.WriteLine(bob.ToString());
Check this handy pipe for Angular2: Usage:
in the SafePipe
code, substitute DomSanitizationService
with DomSanitizer
provide the SafePipe
if your NgModule
<div [style.background-image]="'url(' + your_property + ')' | safe: 'style'"></div>
Here's a macro technique if you want something simple:
#define STRTOLOWER(x) std::transform (x.begin(), x.end(), x.begin(), ::tolower)
#define STRTOUPPER(x) std::transform (x.begin(), x.end(), x.begin(), ::toupper)
#define STRTOUCFIRST(x) std::transform (x.begin(), x.begin()+1, x.begin(), ::toupper); std::transform (x.begin()+1, x.end(), x.begin()+1,::tolower)
However, note that @AndreasSpindler's comment on this answer still is an important consideration, however, if you're working on something that isn't just ASCII characters.
The size of a Java array is fixed when you allocate it, and cannot be changed.
If you want to "grow" or "shrink" an existing array, you have to allocate a new array of the appropriate size and copy the array elements; e.g. using System.arraycopy(...)
or Arrays.copyOf(...)
. A copy loop works as well, though it looks a bit clunky ... IMO.
If you want to "delete" an item or items from an array (in the true sense ... not just replacing them with null
), you need to allocate a new smaller array and copy across the elements you want to retain.
Finally, you can "erase" an element in an array of a reference type by assigning null
to it. But this introduces new problems:
null
elements to mean something, you can't do this.null
element in the appropriate fashion. More complexity and potential for bugs1.There are alternatives in the form of 3rd-party libraries (e.g. Apache Commons ArrayUtils
), but you may want to consider whether it is worth adding a library dependency just for the sake of a method that you could implement yourself with 5-10 lines of code.
It is better (i.e. simpler ... and in many cases, more efficient2) to use a List
class instead of an array. This will take care of (at least) growing the backing storage. And there are operations that take care of inserting and deleting elements anywhere in the list.
For instance, the ArrayList
class uses an array as backing, and automatically grows the array as required. It does not automatically reduce the size of the backing array, but you can tell it to do this using the trimToSize()
method; e.g.
ArrayList l = ...
l.remove(21);
l.trimToSize(); // Only do this if you really have to.
1 - But note that the explicit if (a[e] == null)
checks themselves are likely to be "free", since they can be combined with the implicit null
check that happens when you dereference the value of a[e]
.
2 - I say it is "more efficient in many cases" because ArrayList
uses a simple "double the size" strategy when it needs to grow the backing array. This means that if grow the list by repeatedly appending to it, each element will be copied on average one extra time. By contrast, if you did this with an array you would end up copying each array element close to N/2 times on average.
In Chrome and Edge (2020) checking for :-webkit-autofill
will tell you that the inputs have been filled. However, until the user interacts with the page in some way, your JavaScript cannot get the values in the inputs.
Using $('x').focus()
and $('x').blur()
or triggering a mouse event in code don't help.
3 years of experience later, I've come back to this question and would suggest to write it like this:
string output = new JavaScriptSerializer().Serialize(ListOfMyObject);
One line of code.
"JSON has a special value called null which can be set on any type of data including arrays, objects, number and boolean types."
"The JSON empty concept applies for arrays and objects...Data object does not have a concept of empty lists. Hence, no action is taken on the data object for those properties."
Here is my source.
lambda should be useful for this case. For example,
create function y=x+1
y=lambda x:x+1
call the function
y(1)
then return 2
.
Yes; the Objective-C method syntax is like this for a couple of reasons; one of these is so that it is clear what the parameters you are specifying are. For example, if you are adding an object to an NSMutableArray
at a certain index, you would do it using the method:
- (void)insertObject:(id)anObject atIndex:(NSUInteger)index;
This method is called insertObject:atIndex:
and it is clear that an object is being inserted at a specified index.
In practice, adding a string "Hello, World!" at index 5 of an NSMutableArray
called array
would be called as follows:
NSString *obj = @"Hello, World!";
int index = 5;
[array insertObject:obj atIndex:index];
This also reduces ambiguity between the order of the method parameters, ensuring that you pass the object parameter first, then the index parameter. This becomes more useful when using functions that take a large number of arguments, and reduces error in passing the arguments.
Furthermore, the method naming convention is such because Objective-C doesn't support overloading; however, if you want to write a method that does the same job, but takes different data-types, this can be accomplished; take, for instance, the NSNumber
class; this has several object creation methods, including:
+ (id)numberWithBool:(BOOL)value;
+ (id)numberWithFloat:(float)value;
+ (id)numberWithDouble:(double)value;
In a language such as C++, you would simply overload the number method to allow different data types to be passed as the argument; however, in Objective-C, this syntax allows several different variants of the same function to be implemented, by changing the name of the method for each variant of the function.
Official FAQ ( https://reactjs.org/docs/hooks-faq.html#is-there-something-like-forceupdate ) now recommends this way if you really need to do it:
const [ignored, forceUpdate] = useReducer(x => x + 1, 0);
function handleClick() {
forceUpdate();
}
@Simple-Solution
I use a simple Python HTTP server. When in the directory of the Angular app in question (using a MBP with Mavericks 10.9 and Python 2.x) I simply run
python -m SimpleHTTPServer 8080
And that sets up the simple server on port 8080 letting you visit localhost:8080
on your browser to view the app in development.
Hope that helped!
Like this in simple way .
$this->db->select('*');
$this->db->from('certs');
$this->db->where('certs.id NOT IN (SELECT id_cer FROM revokace)');
return $this->db->get()->result();
From the help file about $
(See ?"$"
) you can read:
$ is only valid for recursive objects, and is only discussed in the section below on recursive objects.
Now, let's check whether x
is recursive
> is.recursive(x)
[1] FALSE
A recursive object has a list-like structure. A vector is not recursive, it is an atomic object instead, let's check
> is.atomic(x)
[1] TRUE
Therefore you get an error when applying $
to a vector (non-recursive object), use [
instead:
> x["ed"]
ed
2
You can also use getElement
> getElement(x, "ed")
[1] 2
Please check below trick to find the date difference between two dates
DATEDIFF(DAY,ordr.DocDate,RDR1.U_ProgDate) datedifff
where you can change according your requirement as you want difference of days or month or year or time.
Here is some code to convert either IPV4 or IPv6 in varchar format to binary(16) and back. This is the smallest form I could think of. It should index well and provide a relatively easy way to filter on subnets. Requires SQL Server 2005 or later. Not sure it's totally bulletproof. Hope this helps.
-- SELECT dbo.fn_ConvertIpAddressToBinary('2002:1ff:6c2::1ff:6c2')
-- SELECT dbo.fn_ConvertIpAddressToBinary('10.4.46.2')
-- SELECT dbo.fn_ConvertIpAddressToBinary('bogus')
ALTER FUNCTION dbo.fn_ConvertIpAddressToBinary
(
@ipAddress VARCHAR(39)
)
RETURNS BINARY(16) AS
BEGIN
DECLARE
@bytes BINARY(16), @vbytes VARBINARY(16), @vbzone VARBINARY(2)
, @colIndex TINYINT, @prevColIndex TINYINT, @parts TINYINT, @limit TINYINT
, @delim CHAR(1), @token VARCHAR(4), @zone VARCHAR(4)
SELECT
@delim = '.'
, @prevColIndex = 0
, @limit = 4
, @vbytes = 0x
, @parts = 0
, @colIndex = CHARINDEX(@delim, @ipAddress)
IF @colIndex = 0
BEGIN
SELECT
@delim = ':'
, @limit = 8
, @colIndex = CHARINDEX(@delim, @ipAddress)
WHILE @colIndex > 0
SELECT
@parts = @parts + 1
, @colIndex = CHARINDEX(@delim, @ipAddress, @colIndex + 1)
SET @colIndex = CHARINDEX(@delim, @ipAddress)
IF @colIndex = 0
RETURN NULL
END
SET @ipAddress = @ipAddress + @delim
WHILE @colIndex > 0
BEGIN
SET @token = SUBSTRING(@ipAddress, @prevColIndex + 1, @Colindex - @prevColIndex - 1)
IF @delim = ':'
BEGIN
SET @zone = RIGHT('0000' + @token, 4)
SELECT
@vbzone = CAST('' AS XML).value('xs:hexBinary(sql:variable("@zone"))', 'varbinary(2)')
, @vbytes = @vbytes + @vbzone
IF @token = ''
WHILE @parts + 1 < @limit
SELECT
@vbytes = @vbytes + @vbzone
, @parts = @parts + 1
END
ELSE
BEGIN
SET @zone = SUBSTRING('' + master.sys.fn_varbintohexstr(CAST(@token AS TINYINT)), 3, 2)
SELECT
@vbzone = CAST('' AS XML).value('xs:hexBinary(sql:variable("@zone"))', 'varbinary(1)')
, @vbytes = @vbytes + @vbzone
END
SELECT
@prevColIndex = @colIndex
, @colIndex = CHARINDEX(@delim, @ipAddress, @colIndex + 1)
END
SET @bytes =
CASE @delim
WHEN ':' THEN @vbytes
ELSE 0x000000000000000000000000 + @vbytes
END
RETURN @bytes
END
-- SELECT dbo.fn_ConvertBinaryToIpAddress(0x200201FF06C200000000000001FF06C2)
-- SELECT dbo.fn_ConvertBinaryToIpAddress(0x0000000000000000000000000A0118FF)
ALTER FUNCTION [dbo].[fn_ConvertBinaryToIpAddress]
(
@bytes BINARY(16)
)
RETURNS VARCHAR(39) AS
BEGIN
DECLARE
@part VARBINARY(2)
, @colIndex TINYINT
, @ipAddress VARCHAR(39)
SET @ipAddress = ''
IF SUBSTRING(@bytes, 1, 12) = 0x000000000000000000000000
BEGIN
SET @colIndex = 13
WHILE @colIndex <= 16
SELECT
@part = SUBSTRING(@bytes, @colIndex, 1)
, @ipAddress = @ipAddress
+ CAST(CAST(@part AS TINYINT) AS VARCHAR(3))
+ CASE @colIndex WHEN 16 THEN '' ELSE '.' END
, @colIndex = @colIndex + 1
IF @ipAddress = '0.0.0.1'
SET @ipAddress = '::1'
END
ELSE
BEGIN
SET @colIndex = 1
WHILE @colIndex <= 16
BEGIN
SET @part = SUBSTRING(@bytes, @colIndex, 2)
SELECT
@ipAddress = @ipAddress
+ CAST('' as xml).value('xs:hexBinary(sql:variable("@part") )', 'varchar(4)')
+ CASE @colIndex WHEN 15 THEN '' ELSE ':' END
, @colIndex = @colIndex + 2
END
END
RETURN @ipAddress
END
You should initialize your variables outside the while loop. Outside the while loop, they currently have no scope. You are just relying on the good graces of php to let the values carry over outside the loop
$hn = "";
$pid = "";
$datereg = "";
$prefix = "";
$fname = "";
$lname = "";
$age = "";
$sex = "";
while (...){}
alternatively, it looks like you are just expecting a single row back. so you could just say
$row = pg_fetch_array($result);
if(!row) {
return array();
}
$hn = $row["patient_hn"];
$pid = $row["patient_id"];
$datereg = $row["patient_date_register"];
$prefix = $row["patient_prefix"];
$fname = $row["patient_fname"];
$lname = $row["patient_lname"];
$age = $row["patient_age"];
$sex = $row["patient_sex"];
return array($hn,$pid,$datereg,$prefix,$fname,$lname,$age,$sex) ;
ssh [email protected]
. This should provide you with shell access to the Ubuntu server.sudo service mysql restart
should do the job.If your mySQL service is named something else like mysqld
you may have to change the command accordingly or try this: sudo /etc/init.d/mysql restart
URLEncoder
is the way to go. You only need to keep in mind to encode only the individual query string parameter name and/or value, not the entire URL, for sure not the query string parameter separator character &
nor the parameter name-value separator character =
.
String q = "random word £500 bank $";
String url = "https://example.com?q=" + URLEncoder.encode(q, StandardCharsets.UTF_8);
When you're still not on Java 10 or newer, then use StandardCharsets.UTF_8.toString()
as charset argument, or when you're still not on Java 7 or newer, then use "UTF-8"
.
Note that spaces in query parameters are represented by +
, not %20
, which is legitimately valid. The %20
is usually to be used to represent spaces in URI itself (the part before the URI-query string separator character ?
), not in query string (the part after ?
).
Also note that there are three encode()
methods. One without Charset
as second argument and another with String
as second argument which throws a checked exception. The one without Charset
argument is deprecated. Never use it and always specify the Charset
argument. The javadoc even explicitly recommends to use the UTF-8 encoding, as mandated by RFC3986 and W3C.
All other characters are unsafe and are first converted into one or more bytes using some encoding scheme. Then each byte is represented by the 3-character string "%xy", where xy is the two-digit hexadecimal representation of the byte. The recommended encoding scheme to use is UTF-8. However, for compatibility reasons, if an encoding is not specified, then the default encoding of the platform is used.
For those who need the same feature in IE 8, this is how I solved the problem:
var myImage = $('<img/>');
myImage.attr('width', 300);
myImage.attr('height', 300);
myImage.attr('class', "groupMediaPhoto");
myImage.attr('src', photoUrl);
I could not force IE8 to use object in constructor.
change onClick to onClick="changeDivContent(this)"
and try
function changeDivContent(btn) {
content.innerHTML = btn.value
}
function changeDivContent(btn) {_x000D_
content.innerHTML = btn.value_x000D_
}
_x000D_
<input type="radio" name="radiobutton" value="A" onClick="changeDivContent(this)">_x000D_
<input type="radio" name="radiobutton" value="B" onClick="changeDivContent(this)">_x000D_
_x000D_
<div id="content"></div>
_x000D_
The Code part :
Image imProfile = new Image(getClass().getResourceAsStream("/img/profile128.png"));
ImageView profileImage=new ImageView(imProfile);
in a javafx maven:
Explicit conversions are very clear to someone that's new to the language. Using type coercion, as others have suggested, leads to ambiguity if a developer is not aware of the coercion rules. Ultimately developer time is more costly than CPU time, so I'd optimize for the former at the cost of the latter. That being said, in this case the difference is likely negligible, but if not I'm sure there are some decent JavaScript compressors that will optimize this sort of thing.
So, for the above reasons I'd go with: n.toString()
or String(n)
. String(n)
is probably a better choice because it won't fail if n
is null or undefined.
Disable the button on the OnClick event, then re-enable on the AJAX callback event handler. Here is how I do it with jQuery.
<script>
$(document).ready(function() {
$('#buttonId').click(function() {
$(this).attr('disabled', 'disabled');
callAjax();
});
});
function callAjax()
{
$.ajax({
url: 'ajax/test.html',
success: function(data) {
//enable button
$('#buttonId').removeAttr('disabled');
}
});
}
</script>
One can use margin in order to change the width of a line and place it center.
import { StyleSheet } from 'react-native;
<View style = {styles.lineStyle} />
const styles = StyleSheet.create({
lineStyle:{
borderWidth: 0.5,
borderColor:'black',
margin:10,
}
});
if you want to give margin dynamically then you can use Dimension width.
This is way more simpler with Maven dependency feature:
Hope this will help!
From the help (if /?
):
The ELSE clause must occur on the same line as the command after the IF. For example: IF EXIST filename. ( del filename. ) ELSE ( echo filename. missing. ) The following would NOT work because the del command needs to be terminated by a newline: IF EXIST filename. del filename. ELSE echo filename. missing Nor would the following work, since the ELSE command must be on the same line as the end of the IF command: IF EXIST filename. del filename. ELSE echo filename. missing
What you are looking for are all objects that have either a=false
or x=5
. In Django, |
serves as OR
operator between querysets:
results = Model.objects.filter(a=false)|Model.objects.filter(x=5)
To reorder the rows of a DataFrame just use a list as follows.
df = df[['Mid', 'Net', 'Upper', 'Lower', 'Zsore']]
This makes it very obvious what was done when reading the code later. Also use:
df.columns
Out[1]: Index(['Net', 'Upper', 'Lower', 'Mid', 'Zsore'], dtype='object')
Then cut and paste to reorder.
For a DataFrame with many columns, store the list of columns in a variable and pop the desired column to the front of the list. Here is an example:
cols = [str(col_name) for col_name in range(1001)]
data = np.random.rand(10,1001)
df = pd.DataFrame(data=data, columns=cols)
mv_col = cols.pop(cols.index('77'))
df = df[[mv_col] + cols]
Now df.columns
has.
Index(['77', '0', '1', '2', '3', '4', '5', '6', '7', '8',
...
'991', '992', '993', '994', '995', '996', '997', '998', '999', '1000'],
dtype='object', length=1001)
I wrote small function for myself that works recursively in Postgres 9.4. Here is the function (I hope it works well for you):
CREATE OR REPLACE FUNCTION jsonb_update(val1 JSONB,val2 JSONB)
RETURNS JSONB AS $$
DECLARE
result JSONB;
v RECORD;
BEGIN
IF jsonb_typeof(val2) = 'null'
THEN
RETURN val1;
END IF;
result = val1;
FOR v IN SELECT key, value FROM jsonb_each(val2) LOOP
IF jsonb_typeof(val2->v.key) = 'object'
THEN
result = result || jsonb_build_object(v.key, jsonb_update(val1->v.key, val2->v.key));
ELSE
result = result || jsonb_build_object(v.key, v.value);
END IF;
END LOOP;
RETURN result;
END;
$$ LANGUAGE plpgsql;
Here is sample use:
select jsonb_update('{"a":{"b":{"c":{"d":5,"dd":6},"cc":1}},"aaa":5}'::jsonb, '{"a":{"b":{"c":{"d":15}}},"aa":9}'::jsonb);
jsonb_update
---------------------------------------------------------------------
{"a": {"b": {"c": {"d": 15, "dd": 6}, "cc": 1}}, "aa": 9, "aaa": 5}
(1 row)
As you can see it analyze deep down and update/add values where needed.
One more important thing needs to be highlighted. It's better to use params
because it is better for performance. When you call a method with params
argument and passed to it nothing:
public void ExampleMethod(params string[] args)
{
// do some stuff
}
call:
ExampleMethod();
Then a new versions of the .Net Framework do this (from .Net Framework 4.6):
ExampleMethod(Array.Empty<string>());
This Array.Empty
object can be reused by framework later, so there are no needs to do redundant allocations. These allocations will occur when you call this method like this:
ExampleMethod(new string[] {});
Basic answer:
mylist = ["b", "C", "A"]
mylist.sort()
This modifies your original list (i.e. sorts in-place). To get a sorted copy of the list, without changing the original, use the sorted()
function:
for x in sorted(mylist):
print x
However, the examples above are a bit naive, because they don't take locale into account, and perform a case-sensitive sorting. You can take advantage of the optional parameter key
to specify custom sorting order (the alternative, using cmp
, is a deprecated solution, as it has to be evaluated multiple times - key
is only computed once per element).
So, to sort according to the current locale, taking language-specific rules into account (cmp_to_key
is a helper function from functools):
sorted(mylist, key=cmp_to_key(locale.strcoll))
And finally, if you need, you can specify a custom locale for sorting:
import locale
locale.setlocale(locale.LC_ALL, 'en_US.UTF-8') # vary depending on your lang/locale
assert sorted((u'Ab', u'ad', u'aa'),
key=cmp_to_key(locale.strcoll)) == [u'aa', u'Ab', u'ad']
Last note: you will see examples of case-insensitive sorting which use the lower()
method - those are incorrect, because they work only for the ASCII subset of characters. Those two are wrong for any non-English data:
# this is incorrect!
mylist.sort(key=lambda x: x.lower())
# alternative notation, a bit faster, but still wrong
mylist.sort(key=str.lower)
you can try:
$_SERVER['PATH_TRANSLATED']
quote:
Filesystem- (not document root-) based path to the current script, after the server has done any virtual-to-real mapping. Note: As of PHP 4.3.2,
PATH_TRANSLATED
is no longer set implicitly under the Apache 2 SAPI in contrast to the situation in Apache 1, where it's set to the same value as theSCRIPT_FILENAME
server variable when it's not populated by Apache.
This change was made to comply with the CGI specification that PATH_TRANSLATED should only exist ifPATH_INFO
is defined. Apache 2 users may useAcceptPathInfo = On
insidehttpd.conf
to definePATH_INFO
source: php.net/manual
I think the only cookie you need is JSESSIONID=xxx..
Also NEVER share your cookies, becasuse someone may access your personal data that way. Specially when the cookies are session. These cookies will stop working once you logout the site.
The simplest solution:
List<String> list = Files.readAllLines(Paths.get("path/of/text"), StandardCharsets.UTF_8);
String[] a = list.toArray(new String[list.size()]);
Note that java.nio.file.Files is since 1.7
Since you are working in currency why not simply do this:
Console.Writeline("Earnings this week: {0:c}", answer);
This will format answer as currency, so on my machine (UK) it will come out as:
Earnings this week: £209.00
No. There is no way of knowing which object it came from.
s
and obj.subObj
both simply have references to the same object.
You could also do:
var obj = { subObj: {foo: 'hello world'} };
var obj2 = {};
obj2.subObj = obj.subObj;
var s = obj.subObj;
You now have three references, obj.subObj
, obj2.subObj
, and s
, to the same object. None of them is special.
It's because you have included a leading /
in your file path. The /
makes it start at the top of your filesystem. Note: filesystem path, not Web site path (you're not accessing it over HTTP). You can use a relative path with include_once
(one that doesn't start with a leading /
).
You can change it to this:
include_once 'headerSite.php';
That will look first in the same directory as the file that's including it (i.e. C:\xampp\htdocs\PoliticalForum\
in your example.
@fthiella 's solution is very elegant.
If in future you want show more than user_id
you could use joins, and there in one line could be all data you need.
If you want to use AND
conditions, and the conditions are in multiple lines in your table, you can use JOINS
example:
SELECT `w_name`.`user_id`
FROM `wp_usermeta` as `w_name`
JOIN `wp_usermeta` as `w_year` ON `w_name`.`user_id`=`w_year`.`user_id`
AND `w_name`.`meta_key` = 'first_name'
AND `w_year`.`meta_key` = 'yearofpassing'
JOIN `wp_usermeta` as `w_city` ON `w_name`.`user_id`=`w_city`.user_id
AND `w_city`.`meta_key` = 'u_city'
JOIN `wp_usermeta` as `w_course` ON `w_name`.`user_id`=`w_course`.`user_id`
AND `w_course`.`meta_key` = 'us_course'
WHERE
`w_name`.`meta_value` = '$us_name' AND
`w_year`.meta_value = '$us_yearselect' AND
`w_city`.`meta_value` = '$us_reg' AND
`w_course`.`meta_value` = '$us_course'
Other thing: Recommend to use prepared statements, because mysql_*
functions is not SQL injection save, and will be deprecated.
If you want to change your code the less as possible, you can use mysqli_
functions:
http://php.net/manual/en/book.mysqli.php
Recommendation:
Use indexes in this table. user_id
highly recommend to be and index, and recommend to be the meta_key
AND meta_value
too, for faster run of query.
The explain:
If you use AND
you 'connect' the conditions for one line. So if you want AND condition for multiple lines, first you must create one line from multiple lines, like this.
Tests: Table Data:
PRIMARY INDEX
int varchar(255) varchar(255)
/ \ |
+---------+---------------+-----------+
| user_id | meta_key | meta_value|
+---------+---------------+-----------+
| 1 | first_name | Kovge |
+---------+---------------+-----------+
| 1 | yearofpassing | 2012 |
+---------+---------------+-----------+
| 1 | u_city | GaPa |
+---------+---------------+-----------+
| 1 | us_course | PHP |
+---------+---------------+-----------+
The result of Query with $us_name='Kovge'
$us_yearselect='2012'
$us_reg='GaPa'
, $us_course='PHP'
:
+---------+
| user_id |
+---------+
| 1 |
+---------+
So it should works.
import sys
print(sys.argv)
More specifically, if you run python example.py one two three
:
>>> import sys
>>> print(sys.argv)
['example.py', 'one', 'two', 'three']