Programs & Examples On #Abmultivalue

An opaque type property that can have multiple values. All the contained values must be of the same type. Each value has a unique identifier and a non-unique label, which may be one of the provided labels or one defined by the user.

How to format numbers?

Due to the bugs found by JasperV — good points! — I have rewritten my old code. I guess I only ever used this for positive values with two decimal places.

Depending on what you are trying to achieve, you may want rounding or not, so here are two versions split across that divide.

First up, with rounding.

I've introduced the toFixed() method as it better handles rounding to specific decimal places accurately and is well support. It does slow things down however.

This version still detaches the decimal, but using a different method than before. The w|0 part removes the decimal. For more information on that, this is a good answer. This then leaves the remaining integer, stores it in k and then subtracts it again from the original number, leaving the decimal by itself.

Also, if we're to take negative numbers into account, we need to while loop (skipping three digits) until we hit b. This has been calculated to be 1 when dealing with negative numbers to avoid putting something like -,100.00

The rest of the loop is the same as before.

function formatThousandsWithRounding(n, dp){
  var w = n.toFixed(dp), k = w|0, b = n < 0 ? 1 : 0,
      u = Math.abs(w-k), d = (''+u.toFixed(dp)).substr(2, dp),
      s = ''+k, i = s.length, r = '';
  while ( (i-=3) > b ) { r = ',' + s.substr(i, 3) + r; }
  return s.substr(0, i + 3) + r + (d ? '.'+d: '');
};

In the snippet below you can edit the numbers to test yourself.

_x000D_
_x000D_
function formatThousandsWithRounding(n, dp){_x000D_
  var w = n.toFixed(dp), k = w|0, b = n < 0 ? 1 : 0,_x000D_
      u = Math.abs(w-k), d = (''+u.toFixed(dp)).substr(2, dp),_x000D_
      s = ''+k, i = s.length, r = '';_x000D_
  while ( (i-=3) > b ) { r = ',' + s.substr(i, 3) + r; }_x000D_
  return s.substr(0, i + 3) + r + (d ? '.'+d: '');_x000D_
};_x000D_
_x000D_
var dp;_x000D_
var createInput = function(v){_x000D_
  var inp = jQuery('<input class="input" />').val(v);_x000D_
  var eql = jQuery('<span>&nbsp;=&nbsp;</span>');_x000D_
  var out = jQuery('<div class="output" />').css('display', 'inline-block');_x000D_
  var row = jQuery('<div class="row" />');_x000D_
  row.append(inp).append(eql).append(out);_x000D_
  inp.keyup(function(){_x000D_
    out.text(formatThousandsWithRounding(Number(inp.val()), Number(dp.val())));_x000D_
  });_x000D_
  inp.keyup();_x000D_
  jQuery('body').append(row);_x000D_
  return inp;_x000D_
};_x000D_
_x000D_
jQuery(function(){_x000D_
  var numbers = [_x000D_
    0, 99.999, -1000, -1000000, 1000000.42, -1000000.57, -1000000.999_x000D_
  ], inputs = $();_x000D_
  dp = jQuery('#dp');_x000D_
  for ( var i=0; i<numbers.length; i++ ) {_x000D_
    inputs = inputs.add(createInput(numbers[i]));_x000D_
  }_x000D_
  dp.on('input change', function(){_x000D_
    inputs.keyup();_x000D_
  });_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<input id="dp" type="range" min="0" max="5" step="1" value="2" title="number of decimal places?" />
_x000D_
_x000D_
_x000D_

Now the other version, without rounding.

This takes a different route and attempts to avoid mathematical calculation (as this can introduce rounding, or rounding errors). If you don't want rounding, then you are only dealing with things as a string i.e. 1000.999 converted to two decimal places will only ever be 1000.99 and not 1001.00.

This method avoids using .split() and RegExp() however, both of which are very slow in comparison. And whilst I learned something new from Michael's answer about toLocaleString, I also was surprised to learn that it is — by quite a way — the slowest method out of them all (at least in Firefox and Chrome; Mac OSX).

Using lastIndexOf() we find the possibly existent decimal point, and from there everything else is pretty much the same. Save for the padding with extra 0s where needed. This code is limited to 5 decimal places. Out of my test this was the faster method.

var formatThousandsNoRounding = function(n, dp){
  var e = '', s = e+n, l = s.length, b = n < 0 ? 1 : 0,
      i = s.lastIndexOf('.'), j = i == -1 ? l : i,
      r = e, d = s.substr(j+1, dp);
  while ( (j-=3) > b ) { r = ',' + s.substr(j, 3) + r; }
  return s.substr(0, j + 3) + r + 
    (dp ? '.' + d + ( d.length < dp ? 
        ('00000').substr(0, dp - d.length):e):e);
};

_x000D_
_x000D_
var formatThousandsNoRounding = function(n, dp){_x000D_
  var e = '', s = e+n, l = s.length, b = n < 0 ? 1 : 0,_x000D_
      i = s.lastIndexOf('.'), j = i == -1 ? l : i,_x000D_
      r = e, d = s.substr(j+1, dp);_x000D_
  while ( (j-=3) > b ) { r = ',' + s.substr(j, 3) + r; }_x000D_
  return s.substr(0, j + 3) + r + _x000D_
   (dp ? '.' + d + ( d.length < dp ? _x000D_
     ('00000').substr(0, dp - d.length):e):e);_x000D_
};_x000D_
_x000D_
var dp;_x000D_
var createInput = function(v){_x000D_
  var inp = jQuery('<input class="input" />').val(v);_x000D_
  var eql = jQuery('<span>&nbsp;=&nbsp;</span>');_x000D_
  var out = jQuery('<div class="output" />').css('display', 'inline-block');_x000D_
  var row = jQuery('<div class="row" />');_x000D_
  row.append(inp).append(eql).append(out);_x000D_
  inp.keyup(function(){_x000D_
    out.text(formatThousandsNoRounding(Number(inp.val()), Number(dp.val())));_x000D_
  });_x000D_
  inp.keyup();_x000D_
  jQuery('body').append(row);_x000D_
  return inp;_x000D_
};_x000D_
_x000D_
jQuery(function(){_x000D_
  var numbers = [_x000D_
    0, 99.999, -1000, -1000000, 1000000.42, -1000000.57, -1000000.999_x000D_
  ], inputs = $();_x000D_
  dp = jQuery('#dp');_x000D_
  for ( var i=0; i<numbers.length; i++ ) {_x000D_
    inputs = inputs.add(createInput(numbers[i]));_x000D_
  }_x000D_
  dp.on('input change', function(){_x000D_
    inputs.keyup();_x000D_
  });_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<input id="dp" type="range" min="0" max="5" step="1" value="2" title="number of decimal places?" />
_x000D_
_x000D_
_x000D_

I'll update with an in-page snippet demo shortly, but for now here is a fiddle:

https://jsfiddle.net/bv2ort0a/2/



Old Method

Why use RegExp for this? — don't use a hammer when a toothpick will do i.e. use string manipulation:

var formatThousands = function(n, dp){
  var s = ''+(Math.floor(n)), d = n % 1, i = s.length, r = '';
  while ( (i -= 3) > 0 ) { r = ',' + s.substr(i, 3) + r; }
  return s.substr(0, i + 3) + r + 
    (d ? '.' + Math.round(d * Math.pow(10, dp || 2)) : '');
};

walk through

formatThousands( 1000000.42 );

First strip off decimal:

s = '1000000', d = ~ 0.42

Work backwards from the end of the string:

',' + '000'
',' + '000' + ',000'

Finalise by adding the leftover prefix and the decimal suffix (with rounding to dp no. decimal points):

'1' + ',000,000' + '.42'

fiddlesticks

http://jsfiddle.net/XC3sS/

Stopping an Android app from console

In eclipse go to the DDMS perspective and in the devices tab click the process you want to kill under the device you want to kill it on. You then just need to press the stop button and it should kill the process.

I'm not sure how you'd do this from the command line tool but there must be a way. Maybe you do it through the adb shell...

Setting value of active workbook in Excel VBA

Try this.

Dim Workbk as workbook
Set Workbk = thisworkbook

Now everything you program will apply just for your containing macro workbook.

HTML Button Close Window

JavaScript can only close a window that was opened using JavaScript. Example below:

<script>
function myFunction() {
  var str = "Sample";
  var result = str.link("https://sample.com");
  document.getElementById("demo").innerHTML = result;
}
</script>

TypeError: window.initMap is not a function

Solved by adding

<script async defer
    src="https://maps.googleapis.com/maps/api/js?key=XXXXXXX&callback=initMap">
    <!--
        https://developers.google.com/maps/documentation/javascript/examples/map-geolocation
    -->
</script>

At the beginning of the same file which contains the rest of the code with function initMap(). It's definitely not the best solution, but it works..

But I think that if you would transform function initMap() to something like var=initMap() and then $(function () ... it would work too.

What is the difference between a framework and a library?

I think library is a set of utilities to reach a goal (for example, sockets, cryptography, etc). Framework is library + RUNTIME EINVIRONNEMENT. For example, ASP.NET is a framework: it accepts HTTP requests, create page object, invoke lyfe cicle events, etc. Framework does all this, you write a bit of code which will be run at a specific time of the life cycle of current request!

Anyway, very interestering question!

ValueError: cannot reshape array of size 30470400 into shape (50,1104,104)

It seems that there is a typo, since 1104*1104*50=60940800 and you are trying to reshape to dimensions 50,1104,104. So it seems that you need to change 104 to 1104.

View RDD contents in Python Spark?

By latest document, you can use rdd.collect().foreach(println) on the driver to display all, but it may cause memory issues on the driver, best is to use rdd.take(desired_number)

https://spark.apache.org/docs/2.2.0/rdd-programming-guide.html

To print all elements on the driver, one can use the collect() method to first bring the RDD to the driver node thus: rdd.collect().foreach(println). This can cause the driver to run out of memory, though, because collect() fetches the entire RDD to a single machine; if you only need to print a few elements of the RDD, a safer approach is to use the take(): rdd.take(100).foreach(println).

What is cURL in PHP?

The cURL extension to PHP is designed to allow you to use a variety of web resources from within your PHP script.

href="file://" doesn't work

Although the ffile:////.exe used to work (for example - some versions of early html 4) it appears html 5 disallows this. Tested using the following:

<a href="ffile:///<path name>/<filename>.exe" TestLink /a> 
<a href="ffile://<path name>/<filename>.exe" TestLink /a> 
<a href="ffile:/<path name>/<filename>.exe" TestLink /a> 
<a href="ffile:<path name>/<filename>.exe" TestLink /a> 
<a href="ffile://///<path name>/<filename>.exe" TestLink /a> 
<a href="file://<path name>/<filename>.exe" TestLink /a> 
<a href="file:/<path name>/<filename>.exe" TestLink /a> 
<a href="file:<path name>/<filename>.exe" TestLink /a> 
<a href="ffile://///<path name>/<filename>.exe" TestLink /a>

as well as ... 1/ substituted the "ffile" with just "file" 2/ all the above variations with the http:// prefixed before the ffile or file.

The best I could see was there is a possibility that if one wanted to open (edit) or save the file, it could be accomplished. However, the exec file would not execute otherwise.

What is the difference between a string and a byte string?

From What is Unicode:

Fundamentally, computers just deal with numbers. They store letters and other characters by assigning a number for each one.

......

Unicode provides a unique number for every character, no matter what the platform, no matter what the program, no matter what the language.

So when a computer represents a string, it finds characters stored in the computer of the string through their unique Unicode number and these figures are stored in memory. But you can't directly write the string to disk or transmit the string on network through their unique Unicode number because these figures are just simple decimal number. You should encode the string to byte string, such as UTF-8. UTF-8 is a character encoding capable of encoding all possible characters and it stores characters as bytes (it looks like this). So the encoded string can be used everywhere because UTF-8 is nearly supported everywhere. When you open a text file encoded in UTF-8 from other systems, your computer will decode it and display characters in it through their unique Unicode number. When a browser receive string data encoded UTF-8 from network, it will decode the data to string (assume the browser in UTF-8 encoding) and display the string.

In python3, you can transform string and byte string to each other:

>>> print('??'.encode('utf-8'))
b'\xe4\xb8\xad\xe6\x96\x87'
>>> print(b'\xe4\xb8\xad\xe6\x96\x87'.decode('utf-8'))
?? 

In a word, string is for displaying to humans to read on a computer and byte string is for storing to disk and data transmission.

How can I iterate over the elements in Hashmap?

You should not map score to player. You should map player (or his name) to score:

Map<Player, Integer> player2score = new HashMap<Player, Integer>();

Then add players to map: int score = .... Player player = new Player(); player.setName("John"); // etc. player2score.put(player, score);

In this case the task is trivial:

int score = player2score.get(player);

php $_POST array empty upon form submission

REFERENCE: http://www.openjs.com/articles/ajax_xmlhttp_using_post.php

POST method

We are going to make some modifications so POST method will be used when sending the request...

var url = "get_data.php";
var params = "lorem=ipsum&name=binny";
http.open("POST", url, true);

//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

http.onreadystatechange = function() {//Call a function when the state changes.
  if(http.readyState == 4 && http.status == 200) {
    alert(http.responseText);
  }
}
http.send(params);

Some http headers must be set along with any POST request. So we set them in these lines...

http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");

With the above lines we are basically saying that the data send is in the format of a form submission. We also give the length of the parameters we are sending.

http.onreadystatechange = function() {//Call a function when the state changes.
  if(http.readyState == 4 && http.status == 200) {
    alert(http.responseText);
  }
}

We set a handler for the 'ready state' change event. This is the same handler we used for the GET method. You can use the http.responseText here - insert into a div using innerHTML(AHAH), eval it(JSON) or anything else.

http.send(params);

Finally, we send the parameters with the request. The given url is loaded only after this line is called. In the GET method, the parameter will be a null value. But in the POST method, the data to be send will be send as the argument of the send function. The params variable was declared in the second line as lorem=ipsum&name=binny - so we send two parameters - 'lorem' and 'name' with the values 'ipsum' and 'binny' respectively.

Error resolving template "index", template might not exist or might not be accessible by any of the configured Template Resolvers

If you are facing this issue and everything looks good, try invalidate cache/restart from your IDE. This will resolve the issue in most of the cases.

Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'

working example:

Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/your_db_name?autoReconnect=true&useSSL=false", "root", "root");

call like this it will work.

pip install fails with "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)"

kenorb’s answer is very useful (and great!).
Among his solutions, maybe this is the most simple one: --trusted-host

For example, in this case you can do

pip install --trusted-host pypi.python.org linkchecker

The pem file(or anything else) is unnecessary.

How to compare two dates to find time difference in SQL Server 2005, date manipulation

Below code gives in hh:mm format.

select RIGHT(LEFT(job_end- job_start,17),5)

Function to get yesterday's date in Javascript in format DD/MM/YYYY

Try this:

function getYesterdaysDate() {
    var date = new Date();
    date.setDate(date.getDate()-1);
    return date.getDate() + '/' + (date.getMonth()+1) + '/' + date.getFullYear();
}

IntelliJ - show where errors are

In my case, IntelliJ was simply in power safe mode

How to show the Project Explorer window in Eclipse

In the main menu go with following steps

Window -> Show View -> Package Explorer.

Twitter bootstrap float div right

You can assign the class name like text-center, left or right. The text will align accordingly to these class name. You don't need to make extra class name separately. These classes are built in BootStrap 3 and bootstrap 4.

Bootstrap 3

v3 Text Alignment Docs

<p class="text-left">Left aligned text.</p>
<p class="text-center">Center aligned text.</p>
<p class="text-right">Right aligned text.</p>
<p class="text-justify">Justified text.</p>
<p class="text-nowrap">No wrap text.</p>

Bootstrap 4

v4 Text Alignment Docs

<p class="text-xs-left">Left aligned text on all viewport sizes.</p>
<p class="text-xs-center">Center aligned text on all viewport sizes.</p>
<p class="text-xs-right">Right aligned text on all viewport sizes.</p>

<p class="text-sm-left">Left aligned text on viewports sized SM (small) or wider.</p>
<p class="text-md-left">Left aligned text on viewports sized MD (medium) or wider.</p>
<p class="text-lg-left">Left aligned text on viewports sized LG (large) or wider.</p>
<p class="text-xl-left">Left aligned text on viewports sized XL (extra-large) or wider.</p>

Getting a UnhandledPromiseRejectionWarning when testing using mocha/chai

The issue is caused by this:

.catch((error) => {
  assert.isNotOk(error,'Promise error');
  done();
});

If the assertion fails, it will throw an error. This error will cause done() never to get called, because the code errored out before it. That's what causes the timeout.

The "Unhandled promise rejection" is also caused by the failed assertion, because if an error is thrown in a catch() handler, and there isn't a subsequent catch() handler, the error will get swallowed (as explained in this article). The UnhandledPromiseRejectionWarning warning is alerting you to this fact.

In general, if you want to test promise-based code in Mocha, you should rely on the fact that Mocha itself can handle promises already. You shouldn't use done(), but instead, return a promise from your test. Mocha will then catch any errors itself.

Like this:

it('should transition with the correct event', () => {
  ...
  return new Promise((resolve, reject) => {
    ...
  }).then((state) => {
    assert(state.action === 'DONE', 'should change state');
  })
  .catch((error) => {
    assert.isNotOk(error,'Promise error');
  });
});

Only local connections are allowed Chrome and Selenium webdriver

  1. Check the version of your installed Chrome browser.

  2. Download the compatible version of ChromeDriver from

    https://sites.google.com/a/chromium.org/chromedriver/

  3. Set the location of the compatible ChromeDriver to:

     System.setProperty("webdriver.chrome.driver", "C:\\Users\\your_path\\chromedriver.exe");
    
  4. Run the Test again.

It should be good now.

How to check for registry value using VbScript

This should work for you:

Dim oShell
Dim iValue

Set oShell = CreateObject("WScript.Shell")

iValue = oShell.RegRead("HKLM\SOFTWARE\SOMETHINGSOMETHING")

In c++ what does a tilde "~" before a function name signify?

It's the destructor. This method is called when the instance of your class is destroyed:

Stack<int> *stack= new Stack<int>;
//do something
delete stack; //<- destructor is called here;

Include in SELECT a column that isn't actually in the database

You may want to use:

SELECT Name, 'Unpaid' AS Status FROM table;

The SELECT clause syntax, as defined in MSDN: SELECT Clause (Transact-SQL), is as follows:

SELECT [ ALL | DISTINCT ]
[ TOP ( expression ) [ PERCENT ] [ WITH TIES ] ] 
<select_list> 

Where the expression can be a constant, function, any combination of column names, constants, and functions connected by an operator or operators, or a subquery.

Converting HTML element to string in JavaScript / JQuery

You can do this:

_x000D_
_x000D_
var $html = $('<iframe width="854" height="480" src="http://www.youtube.com/embed/gYKqrjq5IjU?feature=oembed" frameborder="0" allowfullscreen></iframe>');    _x000D_
var str = $html.prop('outerHTML');_x000D_
console.log(str);
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
_x000D_
_x000D_
_x000D_

FIDDLE DEMO

Can Google Chrome open local links?

I've just came across the same problem and found the chrome extension Open IE.
That's the only one what works for me (Chrome V46 & V52). The only disadvantefge is, that you need to install an additional program, means you need admin rights.

Android How to adjust layout in Full Screen Mode when softkeyboard is visible

Please note that android:windowSoftInputMode="adjustResize" does not work when WindowManager.LayoutParams.FLAG_FULLSCREENis set for an activity. You've got two options.

  1. Either disable fullscreen mode for your activity. Activity is not re-sized in fullscreen mode. You can do this either in xml (by changing the theme of the activity) or in Java code. Add the following lines in your onCreate() method.

    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);   
    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);`
    

OR

  1. Use an alternative way to achieve fullscreen mode. Add the following code in your onCreate() method.

    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
    View decorView = getWindow().getDecorView();
    // Hide the status bar.
    int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
    decorView.setSystemUiVisibility(uiOptions);`
    

Please note that method-2 only works in Android 4.1 and above.

check if variable is dataframe

Use the built-in isinstance() function.

import pandas as pd

def f(var):
    if isinstance(var, pd.DataFrame):
        print("do stuff")

Calculate difference between two dates (number of days)?

In case someone wants numer of whole days as a double (a, b of type DateTime):

 (a.Date - b.Date).TotalDays

Laravel is there a way to add values to a request array

In laravel 5.6 we can pass parameters between Middlewares for example:

FirstMiddleware

public function handle($request, Closure $next, ...$params)
{
    //some code
    return $next($request->merge(['key' => 'value']));
}

SecondMiddleware

public function handle($request, Closure $next, ...$params)
{
    //some code
    dd($request->all());
}

How to declare and add items to an array in Python?

In some languages like JAVA you define an array using curly braces as following but in python it has a different meaning:

Java:

int[] myIntArray = {1,2,3};
String[] myStringArray = {"a","b","c"};

However, in Python, curly braces are used to define dictionaries, which needs a key:value assignment as {'a':1, 'b':2}

To actually define an array (which is actually called list in python) you can do:

Python:

mylist = [1,2,3]

or other examples like:

mylist = list()
mylist.append(1)
mylist.append(2)
mylist.append(3)
print(mylist)
>>> [1,2,3]

Vertical Tabs with JQuery?

super simple function that will allow you to create your own tab / accordion structure here: http://jsfiddle.net/nabeezy/v36DF/

bindSets = function (tabClass, tabClassActive, contentClass, contentClassHidden) {
        //Dependent on jQuery
        //PARAMETERS
        //tabClass: 'the class name of the DOM elements that will be clicked',
        //tabClassActive: 'the class name that will be applied to the active tabClass element when clicked (must write your own css)',
        //contentClass: 'the class name of the DOM elements that will be modified when the corresponding tab is clicked',
        //contentClassHidden: 'the class name that will be applied to all contentClass elements except the active one (must write your own css)',
        //MUST call bindSets() after dom has rendered

        var tabs = $('.' + tabClass);
        var tabContent = $('.' + contentClass);
        if(tabs.length !== tabContent.length){console.log('JS bindSets: sets contain a different number of elements')};
        tabs.each(function (index) {
            this.matchedElement = tabContent[index];
            $(this).click(function () {
                tabs.each(function () {
                    this.classList.remove(tabClassActive);
                });
                tabContent.each(function () {
                    this.classList.add(contentClassHidden);
                });
                this.classList.add(tabClassActive);
                this.matchedElement.classList.remove(contentClassHidden);
            });
        })
        tabContent.each(function () {
            this.classList.add(contentClassHidden);
        });

        //tabs[0].click();
    }
bindSets('tabs','active','content','hidden');

Cannot import the keyfile 'blah.pfx' - error 'The keyfile may be password protected'

I had a similar issue, but after selecting the pfx in a "Strong name key file" ComboBox and typing the password I still got a similar error (without the container name part):

Cannot import the following key file: companyname.pfx. The key file may be password protected. To correct this, try to import the certificate again or manually install the certificate

Also, the "Sign the ClickOnce manifests" certificate information panel wasn't populated.

I did "Select from File..." on my pfx, and it solved the problem.

PHP: How to remove specific element from an array?

unset($array[array_search('strawberry', $array)]);

Select current date by default in ASP.Net Calendar control

If you are already doing databinding:

<asp:Calendar ID="Calendar1" runat="server"  SelectedDate="<%# DateTime.Today %>" />

Will do it. This does require that somewhere you are doing a Page.DataBind() call (or a databind call on a parent control). If you are not doing that and you absolutely do not want any codebehind on the page, then you'll have to create a usercontrol that contains a calendar control and sets its selecteddate.

How to find whether a number belongs to a particular range in Python?

I would use the numpy library, which would allow you to do this for a list of numbers as well:

from numpy import array
a = array([1, 2, 3, 4, 5, 6,])
a[a < 2]

convert 12-hour hh:mm AM/PM to 24-hour hh:mm

I needed this function for a project. I tried devnull69's but I was having some trouble, mostly because the string input is very specific for the am/pm section and I would've needed to change my validation. I messed around with Adrian P.'s jsfiddle and ended up with a version that seems to work better for a larger variety of date formats. Here is the fiddle: http://jsfiddle.net/u91q8kmt/2/.

Here is the function:

function ConvertTimeformat(format, str) {
    var hours = Number(str.match(/^(\d+)/)[1]);
    var minutes = Number(str.match(/:(\d+)/)[1]);
    var AMPM = str.match(/\s?([AaPp][Mm]?)$/)[1];
    var pm = ['P', 'p', 'PM', 'pM', 'pm', 'Pm'];
    var am = ['A', 'a', 'AM', 'aM', 'am', 'Am'];
    if (pm.indexOf(AMPM) >= 0 && hours < 12) hours = hours + 12;
    if (am.indexOf(AMPM) >= 0 && hours == 12) hours = hours - 12;
    var sHours = hours.toString();
    var sMinutes = minutes.toString();
    if (hours < 10) sHours = "0" + sHours;
    if (minutes < 10) sMinutes = "0" + sMinutes;
    if (format == '0000') {
        return (sHours + sMinutes);
    } else if (format == '00:00') {
        return (sHours + ":" + sMinutes);
    } else {
        return false;
    }
}

Get second child using jQuery

You can use two methods in jQuery as given below-

Using jQuery :nth-child Selector You have put the position of an element as its argument which is 2 as you want to select the second li element.

_x000D_
_x000D_
$( "ul li:nth-child(2)" ).click(function(){_x000D_
  //do something_x000D_
});
_x000D_
_x000D_
_x000D_

Using jQuery :eq() Selector

If you want to get the exact element, you have to specify the index value of the item. A list element starts with an index 0. To select the 2nd element of li, you have to use 2 as the argument.

_x000D_
_x000D_
$( "ul li:eq(1)" ).click(function(){_x000D_
  //do something_x000D_
});
_x000D_
_x000D_
_x000D_

See Example: Get Second Child Element of List in jQuery

How do I calculate the date in JavaScript three months prior to today?

Do this

 let currentdate = new Date();
 let last3months = new Date(currentdate.setMonth(currentdate.getMonth()-3));

Javascript's setMonth method also takes care of the year. For instance, the above code will return 2020-01-29 if currentDate is set as new Date("2020-01-29")

Showing an image from console in Python

In a new window using Pillow/PIL

Install Pillow (or PIL), e.g.:

$ pip install pillow

Now you can

from PIL import Image
with Image.open('path/to/file.jpg') as img:
    img.show()

Using native apps

Other common alternatives include running xdg-open or starting the browser with the image path:

import webbrowser
webbrowser.open('path/to/file.jpg')

Inline a Linux console

If you really want to show the image inline in the console and not as a new window, you may do that but only in a Linux console using fbi see ask Ubuntu or else use ASCII-art like CACA.

How do you add a scroll bar to a div?

If you want to add a scroll bar using jquery the following will work. If your div had a id of 'mydiv' you could us the following jquery id selector with css property:

jQuery('#mydiv').css("overflow-y", "scroll");

Maven Run Project

No need to add new plugin in pom.xml. Just run this command

mvn org.codehaus.mojo:exec-maven-plugin:1.5.0:java -Dexec.mainClass="com.example.Main" | grep -Ev '(^\[|Download\w+:)' 

See the maven exec plugin for more usage.

Salt and hash a password in Python

The smart thing is not to write the crypto yourself but to use something like passlib: https://bitbucket.org/ecollins/passlib/wiki/Home

It is easy to mess up writing your crypto code in a secure way. The nasty thing is that with non crypto code you often immediately notice it when it is not working since your program crashes. While with crypto code you often only find out after it is to late and your data has been compromised. Therefor I think it is better to use a package written by someone else who is knowledgable about the subject and which is based on battle tested protocols.

Also passlib has some nice features which make it easy to use and also easy to upgrade to a newer password hashing protocol if an old protocol turns out to be broken.

Also just a single round of sha512 is more vulnerable to dictionary attacks. sha512 is designed to be fast and this is actually a bad thing when trying to store passwords securely. Other people have thought long and hard about all this sort issues so you better take advantage of this.

A generic error occurred in GDI+, JPEG Image to MemoryStream

For me I was using the Image.Save(Stream, ImageCodecInfo, EncoderParameters) and apparently this was causing the infamous A generic error occurred in GDI+ error.

I was trying to use EncoderParameter to save the jpegs in 100% quality. This was working perfectly on "my machine" (doh!) and not on production.

When I used the Image.Save(Stream, ImageFormat) instead, the error disappeared! So like an idiot I continued to use the latter although it saves them in default quality which I assume is just 50%.

Hope this info helps someone.

Mysql database sync between two databases

Replication is not very hard to create.

Here's some good tutorials:

http://www.ghacks.net/2009/04/09/set-up-mysql-database-replication/

http://dev.mysql.com/doc/refman/5.5/en/replication-howto.html

http://www.lassosoft.com/Beginners-Guide-to-MySQL-Replication

Here some simple rules you will have to keep in mind (there's more of course but that is the main concept):

  1. Setup 1 server (master) for writing data.
  2. Setup 1 or more servers (slaves) for reading data.

This way, you will avoid errors.

For example: If your script insert into the same tables on both master and slave, you will have duplicate primary key conflict.

You can view the "slave" as a "backup" server which hold the same information as the master but cannot add data directly, only follow what the master server instructions.

NOTE: Of course you can read from the master and you can write to the slave but make sure you don't write to the same tables (master to slave and slave to master).

I would recommend to monitor your servers to make sure everything is fine.

Let me know if you need additional help

SOAP-ERROR: Parsing WSDL: Couldn't load from <URL>

I got the same error

Could not connect to the Magento WebService API: SOAP-ERROR: Parsing WSDL: Couldn't load from 'example.com/api/soap/?wsdl' : failed to load external entity "example.com/api/soap/?wsdl"

and my issue resolved once I update my Magento Root URL to

example.com/index.php/api/soap/?wsdl

Yes, I was missing index.php that causes the error.

Refused to load the font 'data:font/woff.....'it violates the following Content Security Policy directive: "default-src 'self'". Note that 'font-src'

I had a similar issue. I had mentioned a wrong output folder path in angular.json

"outputPath": "dist/",

app.get('*', (req, res) => {
    res.sendFile(path.join(__dirname, 'dist/index.html'));
});

Android Gradle Apache HttpClient does not exist?

I ran into the same issue. Daniel Nugent's answer helped a bit (after following his advice HttpResponse was found - but the HttpClient was still missing).

So here is what fixed it for me:

  1. (if not already done, commend previous import-statements out)
  2. visit http://hc.apache.org/downloads.cgi
  3. get the 4.5.1.zip from the binary section
  4. unzip it and paste httpcore-4.4.3 & httpclient-4.5.1.jar in project/libs folder
  5. right-click the jar and choose Add as library.

Hope it helps.

Background service with location listener in android

Very easy no need create class extends LocationListener 1- Variable

private LocationManager mLocationManager;
private LocationListener mLocationListener;
private static double currentLat =0;
private static double currentLon =0;

2- onStartService()

@Override public void onStartService() {
    addListenerLocation();
}

3- Method addListenerLocation()

 private void addListenerLocation() {
    mLocationManager = (LocationManager)
            getSystemService(Context.LOCATION_SERVICE);
    mLocationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            currentLat = location.getLatitude();
            currentLon = location.getLongitude();

            Toast.makeText(getBaseContext(),currentLat+"-"+currentLon, Toast.LENGTH_SHORT).show();

        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
        }

        @Override
        public void onProviderEnabled(String provider) {
            Location lastKnownLocation = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            if(lastKnownLocation!=null){
                currentLat = lastKnownLocation.getLatitude();
                currentLon = lastKnownLocation.getLongitude();
            }

        }

        @Override
        public void onProviderDisabled(String provider) {
        }
    };
    mLocationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER, 500, 10, mLocationListener);
}

4- onDestroy()

@Override
public void onDestroy() {
    super.onDestroy();
    mLocationManager.removeUpdates(mLocationListener);
}

What is the maximum length of a valid email address?

320

And the segments look like this

{64}@{255}

64 + 1 + 255 = 320

You should also read this if you are validating emails

http://haacked.com/archive/2007/08/21/i-knew-how-to-validate-an-email-address-until-i.aspx

Disable Laravel's Eloquent timestamps

Override the functions setUpdatedAt() and getUpdatedAtColumn() in your model

public function setUpdatedAt($value)
{
   //Do-nothing
}

public function getUpdatedAtColumn()
{
    //Do-nothing
}

How to remove empty cells in UITableView?

override func viewWillAppear(animated: Bool) {
    self.tableView.tableFooterView = UIView(frame: CGRect.zeroRect)

/// OR 

    self.tableView.tableFooterView = UIView()
}

INSERT INTO...SELECT for all MySQL columns

More Examples & Detail

    INSERT INTO vendors (
     name, 
     phone, 
     addressLine1,
     addressLine2,
     city,
     state,
     postalCode,
     country,
     customer_id
 )
 SELECT 
     name,
     phone,
     addressLine1,
     addressLine2,
     city,
     state ,
     postalCode,
     country,
     customer_id
 FROM 
     customers;

make iframe height dynamic based on content inside- JQUERY/Javascript

There are four different properties you can look at to get the height of the content in an iFrame.

document.documentElement.scrollHeight
document.documentElement.offsetHeight
document.body.scrollHeight
document.body.offsetHeight

Sadly they can all give different answers and these are inconsistant between browsers. If you set the body margin to 0 then the document.body.offsetHeight gives the best answer. To get the correct value try this function; which is taken from the iframe-resizer library that also looks after keeping the iFrame the correct size when the content changes,or the browser is resized.

function getIFrameHeight(){
    function getComputedBodyStyle(prop) {
        function getPixelValue(value) {
            var PIXEL = /^\d+(px)?$/i;

            if (PIXEL.test(value)) {
                return parseInt(value,base);
            }

            var 
                style = el.style.left,
                runtimeStyle = el.runtimeStyle.left;

            el.runtimeStyle.left = el.currentStyle.left;
            el.style.left = value || 0;
            value = el.style.pixelLeft;
            el.style.left = style;
            el.runtimeStyle.left = runtimeStyle;

            return value;
        }

        var 
            el = document.body,
            retVal = 0;

        if (document.defaultView && document.defaultView.getComputedStyle) {
            retVal =  document.defaultView.getComputedStyle(el, null)[prop];
        } else {//IE8 & below
            retVal =  getPixelValue(el.currentStyle[prop]);
        } 

        return parseInt(retVal,10);
    }

    return document.body.offsetHeight +
        getComputedBodyStyle('marginTop') +
        getComputedBodyStyle('marginBottom');
}

How to make Google Fonts work in IE?

You can try fontsforweb.com where fonts are working for all browsers, because they are provided in TTF, WOFF and EOT formats together with CSS code ready to be pasted on your page i.e.

@font-face{ 
    font-family: "gothambold1";
    src: url('http://fontsforweb.com/public/fonts/5903/gothambold1.eot');
    src: local("Gotham-Bold"), url('http://fontsforweb.com/public/fonts/5903/gothambold1.woff') format("woff"), url('http://fontsforweb.com/public/fonts/5903/gothambold1.ttf') format("truetype");
}
.fontsforweb_fontid_5903 {
    font-family: "gothambold1";
}

or you can download them zipped in a package with CSS file attached

then just add class to any element to apply that font i.e.

<h2 class="fontsforweb_fontid_5903">This will be written with Gotham Bold font and will work in all browsers</h2>

See it working: http://jsfiddle.net/SD4MP/

How to read a .properties file which contains keys that have a period character using Shell script

@fork2x

I have tried like this .Please review and update me whether it is right approach or not.

#/bin/sh
function pause(){
   read -p "$*"
}

file="./apptest.properties"


if [ -f "$file" ]
then
    echo "$file found."

dbUser=`sed '/^\#/d' $file | grep 'db.uat.user'  | tail -n 1 | cut -d "=" -f2- | sed 's/^[[:space:]]*//;s/[[:space:]]*$//'`
dbPass=`sed '/^\#/d' $file | grep 'db.uat.passwd'  | tail -n 1 | cut -d "=" -f2- | sed 's/^[[:space:]]*//;s/[[:space:]]*$//'`

echo database user = $dbUser
echo database pass = $dbPass

else
    echo "$file not found."
fi

WinSCP: Permission denied. Error code: 3 Error message from server: Permission denied

You possibly do not have create permissions to the folder. So WinSCP fails to create a temporary file for the transfer.

You have two options:

Can we use join for two different database tables?

SQL Server allows you to join tables from different databases as long as those databases are on the same server. The join syntax is the same; the only difference is that you must fully specify table names.

Let's suppose you have two databases on the same server - Db1 and Db2. Db1 has a table called Clients with a column ClientId and Db2 has a table called Messages with a column ClientId (let's leave asside why those tables are in different databases).

Now, to perform a join on the above-mentioned tables you will be using this query:

select *
from Db1.dbo.Clients c
join Db2.dbo.Messages m on c.ClientId = m.ClientId

UILabel - Wordwrap text

Xcode 10, Swift 4

Wrapping the Text for a label can also be done on Storyboard by selecting the Label, and using Attributes Inspector.

Lines = 0 Linebreak = Word Wrap

enter image description here

Check if a class `active` exist on element with jquery

i wrote a helper method to help me go through all my selected elements and remove the active class.

    function removeClassFromElem(classSelect, classToRemove){
      $(classSelect).each(function(){
        var currElem=$(this);
        if(currElem.hasClass(classToRemove)){
          currElem.removeClass(classToRemove);
        }
      });
    }

    //usage
    removeClassFromElem('.someclass', 'active');

Parsing XML in Python using ElementTree example

If I understand your question correctly:

for elem in doc.findall('timeSeries/values/value'):
    print elem.get('dateTime'), elem.text

or if you prefer (and if there is only one occurrence of timeSeries/values:

values = doc.find('timeSeries/values')
for value in values:
    print value.get('dateTime'), elem.text

The findall() method returns a list of all matching elements, whereas find() returns only the first matching element. The first example loops over all the found elements, the second loops over the child elements of the values element, in this case leading to the same result.

I don't see where the problem with not finding timeSeries comes from however. Maybe you just forgot the getroot() call? (note that you don't really need it because you can work from the elementtree itself too, if you change the path expression to for example /timeSeriesResponse/timeSeries/values or //timeSeries/values)

Playing MP4 files in Firefox using HTML5 video

I can confirm that mp4 just will not work in the video tag. No matter how much you try to mess with the type tag and the codec and the mime types from the server.

Crazy, because for the same exact video, on the same test page, the old embed tag for an mp4 works just fine in firefox. I spent all yesterday messing with this. Firefox is like IE all of a sudden, hours and hours of time, not billable. Yay.

Speaking of IE, it fails FAR MORE gracefully on this. When it can't match up the format it falls to the content between the tags, so it is possible to just put video around object around embed and everything works great. Firefox, nope, despite failing, it puts up the poster image (greyed out so that isn't even useful as a fallback) with an error message smack in the middle. So now the options are put in browser recognition code (meaning we've gained nothing on embedding videos in the last ten years) or ditch html5.

How to Create a script via batch file that will uninstall a program if it was installed on windows 7 64-bit or 32-bit

wmic can call an uninstaller. I haven't tried this, but I think it might work.

wmic /node:computername /user:adminuser /password:password product where name="name of application" call uninstall

If you don't know exactly what the program calls itself, do

wmic product get name | sort

and look for it. You can also uninstall using SQL-ish wildcards.

wmic /node:computername /user:adminuser /password:password product where "name like '%j2se%'" call uninstall

... for example would perform a case-insensitive search for *j2se* and uninstall "J2SE Runtime Environment 5.0 Update 12". (Note that in the example above, %j2se% is not an environment variable, but simply the word "j2se" with a SQL-ish wildcard on each end. If your search string could conflict with an environment or script variable, use double percents to specify literal percent signs, like %%j2se%%.)

If wmic prompts for y/n confirmation before completing the uninstall, try this:

echo y | wmic /node:computername /user:adminuser /password:password product where name="whatever" call uninstall

... to pass a y to it before it even asks.

I haven't tested this, but it's worth a shot anyway. If it works on one computer, then you can just loop through a text file containing all the computer names within your organization using a for loop, or put it in a domain policy logon script.

IF EXISTS in T-SQL

Yes it stops execution so this is generally preferable to HAVING COUNT(*) > 0 which often won't.

With EXISTS if you look at the execution plan you will see that the actual number of rows coming out of table1 will not be more than 1 irrespective of number of matching records.

In some circumstances SQL Server can convert the tree for the COUNT query to the same as the one for EXISTS during the simplification phase (with a semi join and no aggregate operator in sight) an example of that is discussed in the comments here.

For more complicated sub trees than shown in the question you may occasionally find the COUNT performs better than EXISTS however. Because the semi join needs only retrieve one row from the sub tree this can encourage a plan with nested loops for that part of the tree - which may not work out optimal in practice.

Using GZIP compression with Spring Boot/MVC/JavaConfig with RESTful

I had the same problem into my Spring Boot+Spring Data project when invoking to a @RepositoryRestResource.

The problem is the MIME type returned; which is application/hal+json. Adding it to the server.compression.mime-types property solved this problem for me.

Hope this helps to someone else!

Checking if jquery is loaded using Javascript

A quick way is to run a jQuery command in the developer console. On any browser hit F12 and try to access any of the element .

 $("#sideTab2").css("background-color", "yellow");

enter image description here

HTTP redirect: 301 (permanent) vs. 302 (temporary)

301 is that the requested resource has been assigned a new permanent URI and any future references to this resource should be done using one of the returned URIs.

302 is that the requested resource resides temporarily under a different URI.

Since the redirection may be altered on occasion, the client should continue to use the Request-URI for future requests.

This response is only cachable if indicated by a Cache-Control or Expires header field.

Formatting a field using ToText in a Crystal Reports formula field

I think you are looking for ToText(CCur(@Price}/{ValuationReport.YestPrice}*100-100))

You can use CCur to convert numbers or string to Curency formats. CCur(number) or CCur(string)


I think this may be what you are looking for,

Replace (ToText(CCur({field})),"$" , "") that will give the parentheses for negative numbers

It is a little hacky, but I'm not sure CR is very kind in the ways of formatting

Convert string into integer in bash script - "Leading Zero" number error

See ARITHMETIC EVALUATION in man bash:

Constants with a leading 0 are interpreted as octal numbers.

You can remove the leading zero by parameter expansion:

hour=${hour#0}

or force base-10 interpretation:

$((10#$hour + 1))

Crystal Reports 13 And Asp.Net 3.5

I had this same problem and resolved it by making sure all references to the previous version of crystal from the Web Config file, the server, and the publishing workstation were removed. Other than the full trust basically everything that user707217 did, I did and it worked for my upgraded Web application

Heroku + node.js error (Web process failed to bind to $PORT within 60 seconds of launch)

A fixed number can't be set for port, heroku assigns it dynamically using process.env.PORT. But you can add them both, like this process.env.PORT || 5000. Heroku will use the first one, and your localhost will use the second one.

You can even add your call back function. Look at the code below

app.listen(process.env.PORT || 5000, function() {
    console.log("Server started.......");
});

C++ compile error: has initializer but incomplete type

You need this include:

#include <sstream>

Truncating Text in PHP?

$mystring = "this is the text I would like to truncate";

// Pass your variable to the function
$mystring = truncate($mystring);

// Truncated tring printed out;
echo $mystring;

//truncate text function
public function truncate($text) {

    //specify number fo characters to shorten by
    $chars = 25;

    $text = $text." ";
    $text = substr($text,0,$chars);
    $text = substr($text,0,strrpos($text,' '));
    $text = $text."...";
    return $text;
}

How to open up a form from another form in VB.NET?

You may like to first create a dialogue by right clicking the project in solution explorer and in the code file type

dialogue1.show()

that's all !!!

How to find SQL Server running port?

This is another script that I use:

-- Find Database Port script by Jim Pierce  09/05/2018

USE [master]
GO

DECLARE @DynamicportNo NVARCHAR(10);
DECLARE @StaticportNo NVARCHAR(10);
DECLARE @ConnectionportNo INT;

-- Look at the port for the current connection
SELECT @ConnectionportNo = [local_tcp_port]
 FROM sys.dm_exec_connections
    WHERE session_id = @@spid;

-- Look for the port being used in the server's registry
EXEC xp_instance_regread @rootkey = 'HKEY_LOCAL_MACHINE'
                        ,@key =
                         'Software\Microsoft\Microsoft SQL Server\MSSQLServer\SuperSocketNetLib\Tcp\IpAll'
                        ,@value_name = 'TcpDynamicPorts'
                        ,@value = @DynamicportNo OUTPUT

EXEC xp_instance_regread @rootkey = 'HKEY_LOCAL_MACHINE'
                        ,@key =
                         'Software\Microsoft\Microsoft SQL Server\MSSQLServer\SuperSocketNetLib\Tcp\IpAll'
                        ,@value_name = 'TcpPort'
                        ,@value = @StaticportNo OUTPUT

SELECT [PortsUsedByThisConnection] = @ConnectionportNo
      ,[ServerStaticPortNumber] = @StaticportNo
      ,[ServerDynamicPortNumber] = @DynamicportNo
GO

Error message "unreported exception java.io.IOException; must be caught or declared to be thrown"

Exceptions bubble up the stack. If a caller calls a method that throws a checked exception, like IOException, it must also either catch the exception, or itself throw it.

In the case of the first block:

filecontent()
{
    setGUI();
    setRegister();
    showfile();
    setTitle("FileData");
    setVisible(true);
    setSize(300, 300);

    /*
        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent we)
            {
                System.exit(0);
            }
        });
    */
}

You would have to include a try catch block:

filecontent()
{
    setGUI();
    setRegister();
    try {
        showfile();
    }
    catch (IOException e) {
        // Do something here
    }
    setTitle("FileData");
    setVisible(true);
    setSize(300, 300);

    /*
        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent we)
            {
                System.exit(0);
            }
        });
    */
}

In the case of the second:

public void actionPerformed(ActionEvent ae)
{
    if (ae.getSource() == submit)
    {
        showfile();
    }
}

You cannot throw IOException from this method as its signature is determined by the interface, so you must catch the exception within:

public void actionPerformed(ActionEvent ae)
{
    if(ae.getSource()==submit)
    {
        try {
            showfile();
        }
        catch (IOException e) {
            // Do something here
        }
    }
}

Remember, the showFile() method is throwing the exception; that's what the "throws" keyword indicates that the method may throw that exception. If the showFile() method is throwing, then whatever code calls that method must catch, or themselves throw the exception explicitly by including the same throws IOException addition to the method signature, if it's permitted.

If the method is overriding a method signature defined in an interface or superclass that does not also declare that the method may throw that exception, you cannot declare it to throw an exception.

How do I measure the execution time of JavaScript code with callbacks?

For anyone want to get time elapsed value instead of console output :

use process.hrtime() as @D.Deriso suggestion, below is my simpler approach :

function functionToBeMeasured() {
    var startTime = process.hrtime();
    // do some task...
    // ......
    var elapsedSeconds = parseHrtimeToSeconds(process.hrtime(startTime));
    console.log('It takes ' + elapsedSeconds + 'seconds');
}

function parseHrtimeToSeconds(hrtime) {
    var seconds = (hrtime[0] + (hrtime[1] / 1e9)).toFixed(3);
    return seconds;
}

Dead simple example of using Multiprocessing Queue, Pool and Locking

This might be not 100% related to the question, but on my search for an example of using multiprocessing with a queue this shows up first on google.

This is a basic example class that you can instantiate and put items in a queue and can wait until queue is finished. That's all I needed.

from multiprocessing import JoinableQueue
from multiprocessing.context import Process


class Renderer:
    queue = None

    def __init__(self, nb_workers=2):
        self.queue = JoinableQueue()
        self.processes = [Process(target=self.upload) for i in range(nb_workers)]
        for p in self.processes:
            p.start()

    def render(self, item):
        self.queue.put(item)

    def upload(self):
        while True:
            item = self.queue.get()
            if item is None:
                break

            # process your item here

            self.queue.task_done()

    def terminate(self):
        """ wait until queue is empty and terminate processes """
        self.queue.join()
        for p in self.processes:
            p.terminate()

r = Renderer()
r.render(item1)
r.render(item2)
r.terminate()

How do I put text on ProgressBar?

Just want to point out something on @codingbadger answer. When using "ProgressBarRenderer" you should always check for "ProgressBarRenderer.IsSupported" before using the class. For me, this has been a nightmare with Visual Styles errors in Win7 that I couldn't fix. So, a better approach and workaround for the solution would be:

Rectangle clip = new Rectangle(rect.X, rect.Y, (int)Math.Round(((float)Value / Maximum) * rect.Width), rect.Height);
if (ProgressBarRenderer.IsSupported)
  ProgressBarRenderer.DrawHorizontalChunks(g, clip);
else
  g.FillRectangle(new SolidBrush(this.ForeColor), clip);

Notice that the fill will be a simple rectangle and not chunks. Chunks will be used only if ProgressBarRenderer is supported

Aligning text and image on UIButton with imageEdgeInsets and titleEdgeInsets

I'm a little late to this party, but I think I have something useful to add.

Kekoa's answer is great but, as RonLugge mentions, it can make the button no longer respect sizeToFit or, more importantly, can cause the button to clip its content when it is intrinsically sized. Yikes!

First, though,

A brief explanation of how I believe imageEdgeInsets and titleEdgeInsets work:

The docs for imageEdgeInsets have the following to say, in part:

Use this property to resize and reposition the effective drawing rectangle for the button image. You can specify a different value for each of the four insets (top, left, bottom, right). A positive value shrinks, or insets, that edge—moving it closer to the center of the button. A negative value expands, or outsets, that edge.

I believe that this documentation was written imagining that the button has no title, just an image. It makes a lot more sense thought of this way, and behaves how UIEdgeInsets usually do. Basically, the frame of the image (or the title, with titleEdgeInsets) is moved inwards for positive insets and outwards for negative insets.

OK, so what?

I'm getting there! Here's what you have by default, setting an image and a title (the button border is green just to show where it is):

Starting image; no space between title and image.

When you want spacing between an image and a title, without causing either to be crushed, you need to set four different insets, two on each of the image and title. That's because you don't want to change the sizes of those elements' frames, but just their positions. When you start thinking this way, the needed change to Kekoa's excellent category becomes clear:

@implementation UIButton(ImageTitleCentering)

- (void)centerButtonAndImageWithSpacing:(CGFloat)spacing {
    CGFloat insetAmount = spacing / 2.0;
    self.imageEdgeInsets = UIEdgeInsetsMake(0, -insetAmount, 0, insetAmount);
    self.titleEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, -insetAmount);
}

@end

But wait, you say, when I do that, I get this:

Spacing is good, but the image and title are outside the view's frame.

Oh yeah! I forgot, the docs warned me about this. They say, in part:

This property is used only for positioning the image during layout. The button does not use this property to determine intrinsicContentSize and sizeThatFits:.

But there is a property that can help, and that's contentEdgeInsets. The docs for that say, in part:

The button uses this property to determine intrinsicContentSize and sizeThatFits:.

That sounds good. So let's tweak the category once more:

@implementation UIButton(ImageTitleCentering)

- (void)centerButtonAndImageWithSpacing:(CGFloat)spacing {
    CGFloat insetAmount = spacing / 2.0;
    self.imageEdgeInsets = UIEdgeInsetsMake(0, -insetAmount, 0, insetAmount);
    self.titleEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, -insetAmount);
    self.contentEdgeInsets = UIEdgeInsetsMake(0, insetAmount, 0, insetAmount);
}

@end

And what do you get?

Spacing and frame are now correct.

Looks like a winner to me.


Working in Swift and don't want to do any thinking at all? Here's the final version of the extension in Swift:

extension UIButton {
    func centerTextAndImage(spacing: CGFloat) {
        let insetAmount = spacing / 2
        imageEdgeInsets = UIEdgeInsets(top: 0, left: -insetAmount, bottom: 0, right: insetAmount)
        titleEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount, bottom: 0, right: -insetAmount)
        contentEdgeInsets = UIEdgeInsets(top: 0, left: insetAmount, bottom: 0, right: insetAmount)
    }
}

What is AndroidX?

Based on the documentation:

androidx is new package structure to make it clearer which packages are bundled with the Android operating system, and which are packaged with your app's APK. Going forward, the android.* package hierarchy will be reserved for Android packages that ship with the operating system; other packages will be issued in the new androidx.* package hierarchy.

The re-designed package structure is to encourage smaller and more focused libraries. You find details regarding the artifact mappings here.

There are support libraries (containing component and packages for backward compatibility) named "v7" when the minimal SDK level supported is 14, the new naming makes it clear to understand the division between APIs bundled with platform and the libraries for app developers which are used on different versions of Android. You can refer to official announcement for more details.

"/usr/bin/ld: cannot find -lz"

Others have mentioned that lib32z-dev solves the problem, but in general the required packages can be found here:

http://source.android.com/source/initializing.html See "Installing required packages"

How to list only top level directories in Python?

[x for x in os.listdir(somedir) if os.path.isdir(os.path.join(somedir, x))]

How to convert latitude or longitude to meters?

For approximating short distances between two coordinates I used formulas from http://en.wikipedia.org/wiki/Lat-lon:

m_per_deg_lat = 111132.954 - 559.822 * cos( 2 * latMid ) + 1.175 * cos( 4 * latMid);
m_per_deg_lon = 111132.954 * cos ( latMid );

.

In the code below I've left the raw numbers to show their relation to the formula from wikipedia.

double latMid, m_per_deg_lat, m_per_deg_lon, deltaLat, deltaLon,dist_m;

latMid = (Lat1+Lat2 )/2.0;  // or just use Lat1 for slightly less accurate estimate


m_per_deg_lat = 111132.954 - 559.822 * cos( 2.0 * latMid ) + 1.175 * cos( 4.0 * latMid);
m_per_deg_lon = (3.14159265359/180 ) * 6367449 * cos ( latMid );

deltaLat = fabs(Lat1 - Lat2);
deltaLon = fabs(Lon1 - Lon2);

dist_m = sqrt (  pow( deltaLat * m_per_deg_lat,2) + pow( deltaLon * m_per_deg_lon , 2) );

The wikipedia entry states that the distance calcs are within 0.6m for 100km longitudinally and 1cm for 100km latitudinally but I have not verified this as anywhere near that accuracy is fine for my use.

How to include PHP files that require an absolute path?

This should work

$root = realpath($_SERVER["DOCUMENT_ROOT"]);

include "$root/inc/include1.php";

Edit: added imporvement by aussieviking

import an array in python

Checkout the entry on the numpy example list. Here is the entry on .loadtxt()

>>> from numpy import *
>>>
>>> data = loadtxt("myfile.txt")                       # myfile.txt contains 4 columns of numbers
>>> t,z = data[:,0], data[:,3]                         # data is 2D numpy array
>>>
>>> t,x,y,z = loadtxt("myfile.txt", unpack=True)                  # to unpack all columns
>>> t,z = loadtxt("myfile.txt", usecols = (0,3), unpack=True)     # to select just a few columns
>>> data = loadtxt("myfile.txt", skiprows = 7)                    # to skip 7 rows from top of file
>>> data = loadtxt("myfile.txt", comments = '!')                  # use '!' as comment char instead of '#'
>>> data = loadtxt("myfile.txt", delimiter=';')                   # use ';' as column separator instead of whitespace
>>> data = loadtxt("myfile.txt", dtype = int)                     # file contains integers instead of floats

Can't accept license agreement Android SDK Platform 24

I had exactly the same problem. Then i installed "Android 7.0 (API 24) > SDK Platform" and it worked.

enter image description here

Fitting polynomial model to data in R

Regarding the question 'can R help me find the best fitting model', there is probably a function to do this, assuming you can state the set of models to test, but this would be a good first approach for the set of n-1 degree polynomials:

polyfit <- function(i) x <- AIC(lm(y~poly(x,i)))
as.integer(optimize(polyfit,interval = c(1,length(x)-1))$minimum)

Notes

  • The validity of this approach will depend on your objectives, the assumptions of optimize() and AIC() and if AIC is the criterion that you want to use,

  • polyfit() may not have a single minimum. check this with something like:

    for (i in 2:length(x)-1) print(polyfit(i))
    
  • I used the as.integer() function because it is not clear to me how I would interpret a non-integer polynomial.

  • for testing an arbitrary set of mathematical equations, consider the 'Eureqa' program reviewed by Andrew Gelman here

Update

Also see the stepAIC function (in the MASS package) to automate model selection.

How to add elements to a list in R (loop)

You should not add to your list using c inside the loop, because that can result in very very slow code. Basically when you do c(l, new_element), the whole contents of the list are copied. Instead of that, you need to access the elements of the list by index. If you know how long your list is going to be, it's best to initialise it to this size using l <- vector("list", N). If you don't you can initialise it to have length equal to some large number (e.g if you have an upper bound on the number of iterations) and then just pick the non-NULL elements after the loop has finished. Anyway, the basic point is that you should have an index to keep track of the list element and add using that eg

i <- 1
while(...) {
    l[[i]] <- new_element
    i <- i + 1
}

For more info have a look at Patrick Burns' The R Inferno (Chapter 2).

Migration: Cannot add foreign key constraint

make sure your foreing column is over wide rage of foreing key column

I means your foreingkey (in second table) must be same type of your ponter pricipal key (in first table)

your pointer principal key must be add unsigned method, let me show:

on your FIRST migration table:

$table->increments('column_name'); //is INTEGER and UNSIGNED

on your SECOND migration table:

$table->integer('column_forein_name')->unsigned(); //this must be INTEGER and UNSIGNED
$table->foreign('column_forein_name')->references('column_name')->on('first_table_name');

ANOTHER EXAMPLE TO SEE DIFFERENCE

on your FIRST migration table:

$table->mediumIncrements('column_name'); //is MEDIUM-INTEGER and UNSIGNED

on your SECOND migration table:

$table->mediumInteger('column_forein_name')->unsigned(); //this must be MEDIUM-INTEGER and UNSIGNED
$table->foreign('column_forein_name')->references('column_name')->on('first_table_name');

SEE MYSQL NUMERIC TYPES TABLE RANGES

Unclosed Character Literal error

'' encloses single char, while "" encloses a String.

Change

y = 'hello';

-->

y = "hello";

Unable to find valid certification path to requested target - error even after cert imported

Solution when migrating from JDK 8 to JDK 10

JDK 10

root@c339504909345:/opt/jdk-minimal/jre/lib/security #  keytool -cacerts -list
Enter keystore password:
Keystore type: JKS
Keystore provider: SUN

Your keystore contains 80 entries

JDK 8

root@c39596768075:/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/cacerts #  keytool -cacerts -list
Enter keystore password:
Keystore type: JKS
Keystore provider: SUN

Your keystore contains 151 entries

Steps to fix

  • I deleted the JDK 10 cert and replaced it with the JDK 8
  • Since I'm building Docker Images, I could quickly do that using Multi-stage builds
    • I'm building a minimal JRE using jlink as /opt/jdk/bin/jlink \ --module-path /opt/jdk/jmods...

So, here's the different paths and the sequence of the commands...

# Java 8
COPY --from=marcellodesales-springboot-builder-jdk8 /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/cacerts /etc/ssl/certs/java/cacerts

# Java 10
RUN rm -f /opt/jdk-minimal/jre/lib/security/cacerts
RUN ln -s /etc/ssl/certs/java/cacerts /opt/jdk-minimal/jre/lib/security/cacerts

How would I stop a while loop after n amount of time?

Try this module: http://pypi.python.org/pypi/interruptingcow/

from interruptingcow import timeout
try:
    with timeout(60*5, exception=RuntimeError):
        while True:
            test = 0
            if test == 5:
                break
            test = test - 1
except RuntimeError:
    pass

Most Useful Attributes

Off the top of my head, here is a quick list, roughly sorted by frequency of use, of predefined attributes I actually use in a big project (~500k LoCs):

Flags, Serializable, WebMethod, COMVisible, TypeConverter, Conditional, ThreadStatic, Obsolete, InternalsVisibleTo, DebuggerStepThrough.

json_decode() expects parameter 1 to be string, array given

Set decoding to true

Your decoding is not set to true. If you don't have access to set the source to true. The code below will fix it for you.

$WorkingArray = json_decode(json_encode($data),true);

Adding a simple spacer to twitter bootstrap

In Bootstrap 4 you can use classes like mt-5, mb-5, my-5, mx-5 (y for both top and bottom, x for both left and right).

According to their site:

The classes are named using the format {property}{sides}-{size} for xs and {property}{sides}-{breakpoint}-{size} for sm, md, lg, and xl.

Link: https://getbootstrap.com/docs/4.0/utilities/spacing/

Creating C formatted strings (not printing them)

If you have a POSIX-2008 compliant system (any modern Linux), you can use the safe and convenient asprintf() function: It will malloc() enough memory for you, you don't need to worry about the maximum string size. Use it like this:

char* string;
if(0 > asprintf(&string, "Formatting a number: %d\n", 42)) return error;
log_out(string);
free(string);

This is the minimum effort you can get to construct the string in a secure fashion. The sprintf() code you gave in the question is deeply flawed:

  • There is no allocated memory behind the pointer. You are writing the string to a random location in memory!

  • Even if you had written

    char s[42];
    

    you would be in deep trouble, because you can't know what number to put into the brackets.

  • Even if you had used the "safe" variant snprintf(), you would still run the danger that your strings gets truncated. When writing to a log file, that is a relatively minor concern, but it has the potential to cut off precisely the information that would have been useful. Also, it'll cut off the trailing endline character, gluing the next log line to the end of your unsuccessfully written line.

  • If you try to use a combination of malloc() and snprintf() to produce correct behavior in all cases, you end up with roughly twice as much code than I have given for asprintf(), and basically reprogram the functionality of asprintf().


If you are looking at providing a wrapper of log_out() that can take a printf() style parameter list itself, you can use the variant vasprintf() which takes a va_list as an argument. Here is a perfectly safe implementation of such a wrapper:

//Tell gcc that we are defining a printf-style function so that it can do type checking.
//Obviously, this should go into a header.
void log_out_wrapper(const char *format, ...) __attribute__ ((format (printf, 1, 2)));

void log_out_wrapper(const char *format, ...) {
    char* string;
    va_list args;

    va_start(args, format);
    if(0 > vasprintf(&string, format, args)) string = NULL;    //this is for logging, so failed allocation is not fatal
    va_end(args);

    if(string) {
        log_out(string);
        free(string);
    } else {
        log_out("Error while logging a message: Memory allocation failed.\n");
    }
}

get next sequence value from database using hibernate

To get the new id, all you have to do is flush the entity manager. See getNext() method below:

@Entity
@SequenceGenerator(name = "sequence", sequenceName = "mySequence")
public class SequenceFetcher
{
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence")
    private long id;

    public long getId() {
        return id;
    }

    public static long getNext(EntityManager em) {
        SequenceFetcher sf = new SequenceFetcher();
        em.persist(sf);
        em.flush();
        return sf.getId();
    }
}

How can I create an Asynchronous function in Javascript?

You can use a timer:

setTimeout( yourFn, 0 );

(where yourFn is a reference to your function)

or, with Lodash:

_.defer( yourFn );

Defers invoking the func until the current call stack has cleared. Any additional arguments are provided to func when it's invoked.

What does numpy.random.seed(0) do?

There is a nice explanation in Numpy docs: https://docs.scipy.org/doc/numpy-1.15.1/reference/generated/numpy.random.RandomState.html it refers to Mersenne Twister pseudo-random number generator. More details on the algorithm here: https://en.wikipedia.org/wiki/Mersenne_Twister

Access to the path 'c:\inetpub\wwwroot\myapp\App_Data' is denied

Try granting permission to the NETWORK SERVICE user.

What is the difference between AF_INET and PF_INET in socket programming?

Beej's famous network programming guide gives a nice explanation:

In some documentation, you'll see mention of a mystical "PF_INET". This is a weird etherial beast that is rarely seen in nature, but I might as well clarify it a bit here. Once a long time ago, it was thought that maybe a address family (what the "AF" in "AF_INET" stands for) might support several protocols that were referenced by their protocol family (what the "PF" in "PF_INET" stands for).
That didn't happen. Oh well. So the correct thing to do is to use AF_INET in your struct sockaddr_in and PF_INET in your call to socket(). But practically speaking, you can use AF_INET everywhere. And, since that's what W. Richard Stevens does in his book, that's what I'll do here.

Configuring ObjectMapper in Spring

If you want to add custom ObjectMapper for registering custom serializers, try my answer.

In my case (Spring 3.2.4 and Jackson 2.3.1), XML configuration for custom serializer:

<mvc:annotation-driven>
    <mvc:message-converters register-defaults="false">
        <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
            <property name="objectMapper">
                <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
                    <property name="serializers">
                        <array>
                            <bean class="com.example.business.serializer.json.CustomObjectSerializer"/>
                        </array>
                    </property>
                </bean>
            </property>
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>

was in unexplained way overwritten back to default by something.

This worked for me:

CustomObject.java

@JsonSerialize(using = CustomObjectSerializer.class)
public class CustomObject {

    private Long value;

    public Long getValue() {
        return value;
    }

    public void setValue(Long value) {
        this.value = value;
    }
}

CustomObjectSerializer.java

public class CustomObjectSerializer extends JsonSerializer<CustomObject> {

    @Override
    public void serialize(CustomObject value, JsonGenerator jgen,
        SerializerProvider provider) throws IOException,JsonProcessingException {
        jgen.writeStartObject();
        jgen.writeNumberField("y", value.getValue());
        jgen.writeEndObject();
    }

    @Override
    public Class<CustomObject> handledType() {
        return CustomObject.class;
    }
}

No XML configuration (<mvc:message-converters>(...)</mvc:message-converters>) is needed in my solution.

How to check for a JSON response using RSpec?

You could look into the 'Content-Type' header to see that it is correct?

response.header['Content-Type'].should include 'text/javascript'

phpmyadmin.pma_table_uiprefs doesn't exist

Steps:

  • Just download create_table.sql from GitHub and save that file in your system.
  • Then go to your phpMyAdmin.
  • And click on Import from upper tab.
  • At last select create_table.sql and upload that.

After all it works for me and hopefully work for you.

Pointer to 2D arrays in C

Ok, this is actually four different question. I'll address them one by one:

are both equals for the compiler? (speed, perf...)

Yes. The pointer dereferenciation and decay from type int (*)[100][280] to int (*)[280] is always a noop to your CPU. I wouldn't put it past a bad compiler to generate bogus code anyways, but a good optimizing compiler should compile both examples to the exact same code.

is one of these solutions eating more memory than the other?

As a corollary to my first answer, no.

what is the more frequently used by developers?

Definitely the variant without the extra (*pointer) dereferenciation. For C programmers it is second nature to assume that any pointer may actually be a pointer to the first element of an array.

what is the best way, the 1st or the 2nd?

That depends on what you optimize for:

  • Idiomatic code uses variant 1. The declaration is missing the outer dimension, but all uses are exactly as a C programmer expects them to be.

  • If you want to make it explicit that you are pointing to an array, you can use variant 2. However, many seasoned C programmers will think that there's a third dimension hidden behind the innermost *. Having no array dimension there will feel weird to most programmers.

tsql returning a table from a function or store procedure

You need a special type of function known as a table valued function. Below is a somewhat long-winded example that builds a date dimension for a data warehouse. Note the returns clause that defines a table structure. You can insert anything into the table variable (@DateHierarchy in this case) that you want, including building a temporary table and copying the contents into it.

if object_id ('ods.uf_DateHierarchy') is not null
    drop function ods.uf_DateHierarchy
go

create function ods.uf_DateHierarchy (
       @DateFrom datetime
      ,@DateTo   datetime
) returns @DateHierarchy table (
        DateKey           datetime
       ,DisplayDate       varchar (20)
       ,SemanticDate      datetime
       ,MonthKey          int     
       ,DisplayMonth      varchar (10)
       ,FirstDayOfMonth   datetime
       ,QuarterKey        int
       ,DisplayQuarter    varchar (10)
       ,FirstDayOfQuarter datetime
       ,YearKey           int
       ,DisplayYear       varchar (10)
       ,FirstDayOfYear    datetime
) as begin
    declare @year            int
           ,@quarter         int
           ,@month           int
           ,@day             int
           ,@m1ofqtr         int
           ,@DisplayDate     varchar (20)
           ,@DisplayQuarter  varchar (10)
           ,@DisplayMonth    varchar (10)
           ,@DisplayYear     varchar (10)
           ,@today           datetime
           ,@MonthKey        int
           ,@QuarterKey      int
           ,@YearKey         int
           ,@SemanticDate    datetime
           ,@FirstOfMonth    datetime
           ,@FirstOfQuarter  datetime
           ,@FirstOfYear     datetime
           ,@MStr            varchar (2)
           ,@QStr            varchar (2)
           ,@Ystr            varchar (4)
           ,@DStr            varchar (2)
           ,@DateStr         varchar (10)


    -- === Previous ===================================================
    -- Special placeholder date of 1/1/1800 used to denote 'previous'
    -- so that naive date calculations sort and compare in a sensible
    -- order.
    --
    insert @DateHierarchy (
         DateKey
        ,DisplayDate
        ,SemanticDate
        ,MonthKey
        ,DisplayMonth
        ,FirstDayOfMonth
        ,QuarterKey
        ,DisplayQuarter
        ,FirstDayOfQuarter
        ,YearKey
        ,DisplayYear
        ,FirstDayOfYear
    ) values (
         '1800-01-01'
        ,'Previous'
        ,'1800-01-01'
        ,180001
        ,'Prev'
        ,'1800-01-01'
        ,18001
        ,'Prev'
        ,'1800-01-01'
        ,1800
        ,'Prev'
        ,'1800-01-01'
    )

    -- === Calendar Dates =============================================
    -- These are generated from the date range specified in the input
    -- parameters.
    --
    set @today = @Datefrom
    while @today <= @DateTo begin

        set @year = datepart (yyyy, @today)
        set @month = datepart (mm, @today)
        set @day = datepart (dd, @today)
        set @quarter = case when @month in (1,2,3) then 1
                            when @month in (4,5,6) then 2
                            when @month in (7,8,9) then 3
                            when @month in (10,11,12) then 4
                        end
        set @m1ofqtr = @quarter * 3 - 2 

        set @DisplayDate = left (convert (varchar, @today, 113), 11)
        set @SemanticDate = @today
        set @MonthKey = @year * 100 + @month
        set @DisplayMonth = substring (convert (varchar, @today, 113), 4, 8)
        set @Mstr = right ('0' + convert (varchar, @month), 2)
        set @Dstr = right ('0' + convert (varchar, @day), 2)
        set @Ystr = convert (varchar, @year)
        set @DateStr = @Ystr + '-' + @Mstr + '-01'
        set @FirstOfMonth = convert (datetime, @DateStr, 120)
        set @QuarterKey = @year * 10 + @quarter
        set @DisplayQuarter = 'Q' + convert (varchar, @quarter) + ' ' +
                                    convert (varchar, @year)
        set @QStr = right ('0' + convert (varchar, @m1ofqtr), 2)   
        set @DateStr = @Ystr + '-' + @Qstr + '-01' 
        set @FirstOfQuarter = convert (datetime, @DateStr, 120)
        set @YearKey = @year
        set @DisplayYear = convert (varchar, @year)
        set @DateStr = @Ystr + '-01-01'
        set @FirstOfYear = convert (datetime, @DateStr)


        insert @DateHierarchy (
             DateKey
            ,DisplayDate
            ,SemanticDate
            ,MonthKey
            ,DisplayMonth
            ,FirstDayOfMonth
            ,QuarterKey
            ,DisplayQuarter
            ,FirstDayOfQuarter
            ,YearKey
            ,DisplayYear
            ,FirstDayOfYear
        ) values (
             @today
            ,@DisplayDate
            ,@SemanticDate
            ,@Monthkey
            ,@DisplayMonth
            ,@FirstOfMonth
            ,@QuarterKey
            ,@DisplayQuarter
            ,@FirstOfQuarter
            ,@YearKey
            ,@DisplayYear
            ,@FirstOfYear
        )

        set @today = dateadd (dd, 1, @today)
    end

    -- === Specials ===================================================
    -- 'Ongoing', 'Error' and 'Not Recorded' set two years apart to
    -- avoid accidental collisions on 'Next Year' calculations.
    --
    insert @DateHierarchy (
         DateKey
        ,DisplayDate
        ,SemanticDate
        ,MonthKey
        ,DisplayMonth
        ,FirstDayOfMonth
        ,QuarterKey
        ,DisplayQuarter
        ,FirstDayOfQuarter
        ,YearKey
        ,DisplayYear
        ,FirstDayOfYear
    ) values (
         '9000-01-01'
        ,'Ongoing'
        ,'9000-01-01'
        ,900001
        ,'Ong.'
        ,'9000-01-01'
        ,90001
        ,'Ong.'
        ,'9000-01-01'
        ,9000
        ,'Ong.'
        ,'9000-01-01'
    )

    insert @DateHierarchy (
         DateKey
        ,DisplayDate
        ,SemanticDate
        ,MonthKey
        ,DisplayMonth
        ,FirstDayOfMonth
        ,QuarterKey
        ,DisplayQuarter
        ,FirstDayOfQuarter
        ,YearKey
        ,DisplayYear
        ,FirstDayOfYear
    ) values (
         '9100-01-01'
        ,'Error'
        ,null
        ,910001
        ,'Error'
        ,null
        ,91001
        ,'Error'
        ,null
        ,9100
        ,'Err'
        ,null
    )

    insert @DateHierarchy (
         DateKey
        ,DisplayDate
        ,SemanticDate
        ,MonthKey
        ,DisplayMonth
        ,FirstDayOfMonth
        ,QuarterKey
        ,DisplayQuarter
        ,FirstDayOfQuarter
        ,YearKey
        ,DisplayYear
        ,FirstDayOfYear
    ) values (
         '9200-01-01'
        ,'Not Recorded'
        ,null
        ,920001
        ,'N/R'
        ,null
        ,92001
        ,'N/R'
        ,null
        ,9200
        ,'N/R'
        ,null
    )

    return
end

go

support FragmentPagerAdapter holds reference to old fragments

My solution: I set almost every View as static. Now my app interacts perfect. Being able to call the static methods from everywhere is maybe not a good style, but why to play around with code that doesn't work? I read a lot of questions and their answers here on SO and no solution brought success (for me).

I know it can leak the memory, and waste heap, and my code will not be fit on other projects, but I don't feel scared about this - I tested the app on different devices and conditions, no problems at all, the Android Platform seems to be able handle this. The UI gets refreshed every second and even on a S2 ICS (4.0.3) device the app is able to handle thousands of geo-markers.

Getting URL hash location, and using it in jQuery

Since jQuery 1.9, the :target selector will match the URL hash. So you could do:

$(":target").show(); // or $("ul:target").show();

Which would select the element with the ID matching the hash and show it.

Get selected option from select element

Try this:

$('#ddlCodes').change(function() {
  var option = this.options[this.selectedIndex];
  $('#txtEntry2').text($(option).text());
});

How can I fill a div with an image while keeping it proportional?

The CSS object-fit: cover and object-position: left center property values now address this issue.

Linux bash: Multiple variable assignment

Chapter 5 of the Bash Cookbook by O'Reilly, discusses (at some length) the reasons for the requirement in a variable assignment that there be no spaces around the '=' sign

MYVAR="something"

The explanation has something to do with distinguishing between the name of a command and a variable (where '=' may be a valid argument).

This all seems a little like justifying after the event, but in any case there is no mention of a method of assigning to a list of variables.

Can't install any packages in Node.js using "npm install"

This error might also occur due to proxy settings, once check that your proxy allow the access to npm commands.

It worked for me quite well.

Can I scroll a ScrollView programmatically in Android?

I had to create Interface

public interface ScrollViewListener {
    void onScrollChanged(ScrollViewExt scrollView, 
                         int x, int y, int oldx, int oldy);
}    

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ScrollView;

public class CustomScrollView extends ScrollView {
    private ScrollViewListener scrollViewListener = null;
    public ScrollViewExt(Context context) {
        super(context);
    }

    public CustomScrollView (Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public CustomScrollView (Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public void setScrollViewListener(ScrollViewListener scrollViewListener) {
        this.scrollViewListener = scrollViewListener;
    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (scrollViewListener != null) {
            scrollViewListener.onScrollChanged(this, l, t, oldl, oldt);
        }
    }
}




<"Your Package name ".CustomScrollView 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/scrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusableInTouchMode="true"
    android:scrollbars="vertical">

    private CustomScrollView scrollView;

scrollView = (CustomScrollView)mView.findViewById(R.id.scrollView);
        scrollView.setScrollViewListener(this);


    @Override
    public void onScrollChanged(ScrollViewExt scrollView, int x, int y, int oldx, int oldy) {
        // We take the last son in the scrollview
        View view = (View) scrollView.getChildAt(scrollView.getChildCount() - 1);
        int diff = (view.getBottom() - (scrollView.getHeight() + scrollView.getScrollY()));

        // if diff is zero, then the bottom has been reached
        if (diff == 0) {
                // do stuff
            //TODO keshav gers
            pausePlayer();
            videoFullScreenPlayer.setVisibility(View.GONE);

        }
    }

The database cannot be opened because it is version 782. This server supports version 706 and earlier. A downgrade path is not supported

Another solution is to migrate the database to e.g 2012 when you "export" the DB from e.g. Sql Server manager 2014. This is done in menu Tasks-> generate scripts when right-click on DB. Just follow this instruction:

https://www.mssqltips.com/sqlservertip/2810/how-to-migrate-a-sql-server-database-to-a-lower-version/

It generates an scripts with everything and then in your SQL server manager e.g. 2012 run the script as specified in the instruction. I have performed the test with success.

Access iframe elements in JavaScript

You should access frames from window and not document

window.frames['myIFrame'].document.getElementById('myIFrameElemId')

How to remove symbols from a string with Python?

One way, using regular expressions:

>>> s = "how much for the maple syrup? $20.99? That's ridiculous!!!"
>>> re.sub(r'[^\w]', ' ', s)
'how much for the maple syrup   20 99  That s ridiculous   '
  • \w will match alphanumeric characters and underscores

  • [^\w] will match anything that's not alphanumeric or underscore

maven compilation failure

It's easy to get this error in a multi-module project. If, for example, you made changes to modules A, B, and C, but then you try to compile just module B, you are susceptible to this error. Say module B has a dependency on module A. Since only module B was compiled, the class files from module A are now out of date and possibly invalid.

Compiling all the modules (or modules in the proper hierarchical dependency order) resolves this error, if this is the nature of your problem.

How to get base URL in Web API controller?

Al WebApi 2, just calling HttpContext.Current.Request.Path;

What is the apply function in Scala?

TLDR for people comming from c++

It's just overloaded operator of ( ) parentheses

So in scala:

class X {
   def apply(param1: Int, param2: Int, param3: Int) : Int = {
     // Do something
   }
}

Is same as this in c++:

class X {
   int operator()(int param1, int param2, int param3) {
      // do something
   }
};

How to calculate age in T-SQL with years, months, and days

declare @StartDate datetime = '2016-01-31'
declare @EndDate datetime = '2016-02-01'
SELECT @StartDate AS [StartDate]
      ,@EndDate AS [EndDate]
      ,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END AS [Years]
      ,DATEDIFF(Month,(DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END AS [Months]
      ,DATEDIFF(Day, DATEADD(Month,DATEDIFF(Month, (DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END  ,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)) ,@EndDate) - CASE WHEN DATEADD(Day,DATEDIFF(Day, DATEADD(Month,DATEDIFF(Month, (DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END  ,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)) ,@EndDate),DATEADD(Month,DATEDIFF(Month, (DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END  ,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate))) > @EndDate THEN 1 ELSE 0 END AS [Days]

What is an OS kernel ? How does it differ from an operating system?

Well, there is a difference between kernel and OS. Kernel as described above is the heart of OS which manages the core features of an OS while if some useful applications and utilities are added over the kernel, then the complete package becomes an OS. So, it can easily be said that an operating system consists of a kernel space and a user space.

So, we can say that Linux is a kernel as it does not include applications like file-system utilities, windowing systems and graphical desktops, system administrator commands, text editors, compilers etc. So, various companies add these kind of applications over linux kernel and provide their operating system like ubuntu, suse, centOS, redHat etc.

How do I get the current GPS location programmatically in Android?

For just location checking you can use following code. You can put it in your onStart() of main activity and display alert dialog if return is false.

private boolean isLocationAccurate()
    {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT)
        {
            String provider = Settings.Secure
                    .getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
            if (provider != null && !provider.contains("gps"))
            {
                return false;
            }
        }
        else
        {
            try
            {
                int status = Settings.Secure
                        .getInt(this.getContentResolver(), Settings.Secure.LOCATION_MODE);
                if (status != Settings.Secure.LOCATION_MODE_HIGH_ACCURACY)
                {
                    return false;
                }
            }
            catch (Settings.SettingNotFoundException e)
            {
                Log.e(TAG, e.getMessage());
            }
        }

        return true;
    }

CSS Input field text color of inputted text

replace:

input, select, textarea{
    color: #000;
}

with:

input, select, textarea{
    color: #f00;
}

or color: #ff0000;

How to set 24-hours format for date on java?

LocalDateTime#plusHours

LocalDateTime is modelled on ISO-8601 standards and was introduced with Java-8 as part of JSR-310 implementation.

Use LocalDateTime#plusHours to get a copy of this LocalDateTime with the specified number of hours added.

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
    public static void main(String[] args) {
        // ZoneId.systemDefault() returns the timezone of your JVM. It is also the
        // default timezone for date-time type i.e.
        // LocalDateTime.now(ZoneId.systemDefault()) is same as LocalDateTime.now().
        // Change the timezone as per your requirement e.g. ZoneId.of("Europe/London")
        LocalDateTime ldt = LocalDateTime.now(ZoneId.systemDefault());
        System.out.println(ldt);

        LocalDateTime after8Hours = ldt.plusHours(8);
        System.out.println(after8Hours);

        // Custom format
        DateTimeFormatter dtfTimeFormat24H = DateTimeFormatter.ofPattern("dd/MM/uuuu HH:mm:ss", Locale.ENGLISH);
        DateTimeFormatter dtfTimeFormat12h = DateTimeFormatter.ofPattern("dd/MM/uuuu hh:mm:ss a", Locale.ENGLISH);
        System.out.println(dtfTimeFormat24H.format(after8Hours));
        System.out.println(dtfTimeFormat12h.format(after8Hours));
    }
}

Output:

2021-01-07T15:24:52.736612
2021-01-07T23:24:52.736612
07/01/2021 23:24:52
07/01/2021 11:24:52 PM

Learn more about the modern date-time API from Trail: Date Time.

Using legacy API:

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        Date currentDateTime = calendar.getTime();
        System.out.println(currentDateTime);

        // After 8 hours
        calendar.add(Calendar.HOUR_OF_DAY, 8);
        Date after8Hours = calendar.getTime();
        System.out.println(after8Hours);

        // Custom formats
        SimpleDateFormat sdf24H = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss", Locale.ENGLISH);
        // Change the timezone as per your requirement e.g.
        // TimeZone.getTimeZone("Europe/London")
        sdf24H.setTimeZone(TimeZone.getDefault());

        SimpleDateFormat sdf12h = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss a", Locale.ENGLISH);
        sdf12h.setTimeZone(TimeZone.getDefault());

        System.out.println(sdf24H.format(after8Hours));
        System.out.println(sdf12h.format(after8Hours));
    }
}

Output:

Thu Jan 07 15:34:10 GMT 2021
Thu Jan 07 23:34:10 GMT 2021
07/01/2021 23:34:10
07/01/2021 11:34:10 PM

Some important notes:

  1. A date-time object is supposed to store the information about date, time, timezone etc., not about the formatting. You can format a date-time object into a String with the pattern of your choice using date-time formatting API.
    • The date-time formatting API for the modern date-time types is in the package, java.time.format e.g. java.time.format.DateTimeFormatter, java.time.format.DateTimeFormatterBuilder etc.
    • The date-time formatting API for the legacy date-time types is in the package, java.text e.g. java.text.SimpleDateFormat, java.text.DateFormat etc.
  2. The java.util.Date object is not a real date-time object like the modern date-time types; rather, it represents the milliseconds from the Epoch of January 1, 1970. When you print an object of java.util.Date, its toString method returns the date-time in the JVM's timezone, calculated from this milliseconds value. If you need to print the date-time in a different timezone, you will need to set the timezone to SimpleDateFormat and obtain the formatted string from it.
  3. The date-time API of java.util and their formatting API, SimpleDateFormat are outdated and error-prone. It is recommended to stop using them completely and switch to the modern date-time API.

How to open spss data files in excel?

(Not exactly an answer for you, since do you want avoid opening the files, but maybe this helps others).

I have been using the open source GNU PSPP package to convert the sav tile to csv. You can download the Windows version at least from SourceForge [1]. Once you have the software, you can convert sav file to csv with following command line:

pspp-convert <input.sav> <output.csv>

[1] http://sourceforge.net/projects/pspp4windows/files/?source=navbar

How to get IntPtr from byte[] in C#

This should work but must be used within an unsafe context:

byte[] buffer = new byte[255];
fixed (byte* p = buffer)
{
    IntPtr ptr = (IntPtr)p;
    // do you stuff here
}

beware, you have to use the pointer in the fixed block! The gc can move the object once you are not anymore in the fixed block.

Questions every good Java/Java EE Developer should be able to answer?

Core: 1. What are checked and unchecked exceptions ? 2. While adding new exception in code what type (Checked/Unchecked) to use when ?

Servlet: 1. What is the difference between response.sendRedirect() and request.forward() ?

Complexities of binary tree traversals

Depth first traversal of a binary tree is of order O(n).

Algo -- <b>
    PreOrderTrav():-----------------T(n)<b>
    if root is null---------------O(1)<b>
      return null-----------------O(1)<b>
    else:-------------------------O(1)<b>
      print(root)-----------------O(1)<b>
      PreOrderTrav(root.left)-----T(n/2)<b>
      PreOrderTrav(root.right)----T(n/2)<b>

If the time complexity of the algo is T(n) then it can be written as T(n) = 2*T(n/2) + O(1). If we apply back substitution we will get T(n) = O(n).

Maven not found in Mac OSX mavericks

Maven is not installed any more by default on Mac OS X 10.9. You need to install it yourself, for example using Homebrew.

The command to install Maven using Homebrew is brew install maven

Unsupported major.minor version 52.0

You will need to change your compiler compliance level back to 1.7 in your IDE.

This can be done in the preferences settings of your IDE. For example, in Eclipse go to menu Windows ? Preferences, select Java, and expand it. Then select Compiler and change the compliance level to 1.7. I am sure this will work from there.

How to convert integer timestamp to Python datetime

datetime.datetime.fromtimestamp() is correct, except you are probably having timestamp in miliseconds (like in JavaScript), but fromtimestamp() expects Unix timestamp, in seconds.

Do it like that:

>>> import datetime
>>> your_timestamp = 1331856000000
>>> date = datetime.datetime.fromtimestamp(your_timestamp / 1e3)

and the result is:

>>> date
datetime.datetime(2012, 3, 16, 1, 0)

Does it answer your question?

EDIT: J.F. Sebastian correctly suggested to use true division by 1e3 (float 1000). The difference is significant, if you would like to get precise results, thus I changed my answer. The difference results from the default behaviour of Python 2.x, which always returns int when dividing (using / operator) int by int (this is called floor division). By replacing the divisor 1000 (being an int) with the 1e3 divisor (being representation of 1000 as float) or with float(1000) (or 1000. etc.), the division becomes true division. Python 2.x returns float when dividing int by float, float by int, float by float etc. And when there is some fractional part in the timestamp passed to fromtimestamp() method, this method's result also contains information about that fractional part (as the number of microseconds).

Argparse optional positional arguments?

parser.add_argument also has a switch required. You can use required=False. Here is a sample snippet with Python 2.7:

parser = argparse.ArgumentParser(description='get dir')
parser.add_argument('--dir', type=str, help='dir', default=os.getcwd(), required=False)
args = parser.parse_args()

How to query nested objects?

db.messages.find( { headers : { From: "[email protected]" } } )

This queries for documents where headers equals { From: ... }, i.e. contains no other fields.


db.messages.find( { 'headers.From': "[email protected]" } )

This only looks at the headers.From field, not affected by other fields contained in, or missing from, headers.


Dot-notation docs

How to use onResume()?

onResume() is one of the methods called throughout the activity lifecycle. onResume() is the counterpart to onPause() which is called anytime an activity is hidden from view, e.g. if you start a new activity that hides it. onResume() is called when the activity that was hidden comes back to view on the screen.

You're question asks abou what method is used to restart an activity. onCreate() is called when the activity is first created. In practice, most activities persist in the background through a series of onPause() and onResume() calls. An activity is only really "restarted" by onRestart() if it is first fully stopped by calling onStop() and then brought back to life. Thus if you are not actually stopping activities with onStop() it is most likley you will be using onResume().

Read the android doc in the above link to get a better understanding of the relationship between the different lifestyle methods. Regardless of which lifecycle method you end up using the general format is the same. You must override the standard method and include your code, i.e. what you want the activity to do at that point, in the commented section.

@Override
public void onResume(){
 //will be executed onResume
}

Concatenating two one-dimensional NumPy arrays

The line should be:

numpy.concatenate([a,b])

The arrays you want to concatenate need to be passed in as a sequence, not as separate arguments.

From the NumPy documentation:

numpy.concatenate((a1, a2, ...), axis=0)

Join a sequence of arrays together.

It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a scalar.

isset() and empty() - what to use

Here are the outputs of isset() and empty() for the 4 possibilities: undeclared, null, false and true.

$a=null;
$b=false;
$c=true;

var_dump(array(isset($z1),isset($a),isset($b),isset($c)),true); //$z1 previously undeclared
var_dump(array(empty($z2),empty($a),empty($b),empty($c)),true); //$z2 previously undeclared

//array(4) { [0]=> bool(false) [1]=> bool(false) [2]=> bool(true) [3]=> bool(true) } 
//array(4) { [0]=> bool(true) [1]=> bool(true) [2]=> bool(true) [3]=> bool(false) } 

You'll notice that all the 'isset' results are opposite of the 'empty' results except for case $b=false. All the values (except null which isn't a value but a non-value) that evaluate to false will return true when tested for by isset and false when tested by 'empty'.

So use isset() when you're concerned about the existence of a variable. And use empty when you're testing for true or false. If the actual type of emptiness matters, use is_null and ===0, ===false, ===''.

PHP Composer update "cannot allocate memory" error (using Laravel 4)

I had a similar issue on the cheapest server (512MB RAM) hosted with DigitalOcean, and I was also running Jenkins CI on the same server. After I stopped the Jenkins instance the composer install command worked (well, to a point, it failed with the mcrypt extension missing besides already being installed!).

Maybe if you have another app running on the server, maybe its worth trying to stop it and re-running the command.

How to save data file into .RData?

Alternatively, when you want to save individual R objects, I recommend using saveRDS.

You can save R objects using saveRDS, then load them into R with a new variable name using readRDS.

Example:

# Save the city object
saveRDS(city, "city.rds")

# ...

# Load the city object as city
city <- readRDS("city.rds")

# Or with a different name
city2 <- readRDS("city.rds")

But when you want to save many/all your objects in your workspace, use Manetheran's answer.

How to resolve the error on 'react-native start'

[Quick Answer]

There are a problem with Metro using some NPM and Node versions.

You can fix the problem changing some code in the file \node_modules\metro-config\src\defaults\blacklist.js .

Search this variable:

var sharedBlacklist = [
  /node_modules[/\\]react[/\\]dist[/\\].*/,
  /website\/node_modules\/.*/,
  /heapCapture\/bundle\.js/,
  /.*\/__tests__\/.*/
];

and change to this:

var sharedBlacklist = [
  /node_modules[\/\\]react[\/\\]dist[\/\\].*/,
  /website\/node_modules\/.*/,
  /heapCapture\/bundle\.js/,
  /.*\/__tests__\/.*/
];

Please note that if you run an npm install or a yarn install you need to change the code again.

How to get the first column of a pandas DataFrame as a Series?

From v0.11+, ... use df.iloc.

In [7]: df.iloc[:,0]
Out[7]: 
0    1
1    2
2    3
3    4
Name: x, dtype: int64

How can I clear console

edit: completely redone question

Simply test what system they are on and send a system command depending on the system. though this will be set at compile time

#ifdef __WIN32
    system("cls");
#else
    system("clear"); // most other systems use this
#endif

This is a completely new method!

How to pass variable number of arguments to a PHP function

This is now possible with PHP 5.6.x, using the ... operator (also known as splat operator in some languages):

Example:

function addDateIntervalsToDateTime( DateTime $dt, DateInterval ...$intervals )
{
    foreach ( $intervals as $interval ) {
        $dt->add( $interval );
    }
    return $dt;
}

addDateIntervaslToDateTime( new DateTime, new DateInterval( 'P1D' ), 
        new DateInterval( 'P4D' ), new DateInterval( 'P10D' ) );

Difference between window.location.href and top.location.href

top object makes more sense inside frames. Inside a frame, window refers to current frame's window while top refers to the outermost window that contains the frame(s). So:

window.location.href = 'somepage.html'; means loading somepage.html inside the frame.

top.location.href = 'somepage.html'; means loading somepage.html in the main browser window.

Two other interesting objects are self and parent.

What does "./" (dot slash) refer to in terms of an HTML file path location?

You can use the following list as quick reference:

   /   = Root directory
   .   = This location
   ..  = Up a directory
   ./  = Current directory
   ../ = Parent of current directory
   ../../ = Two directories backwards

Useful article: https://css-tricks.com/quick-reminder-about-file-paths/

Update multiple rows using select statement

You can use alias to improve the query:

UPDATE t1
   SET t1.Value = t2.Value
  FROM table1 AS t1
         INNER JOIN 
       table2 AS t2
         ON t1.ID = t2.ID

CSS3 100vh not constant in mobile browser

I came up with a React component – check it out if you use React or browse the source code if you don't, so you can adapt it to your environment.

It sets the fullscreen div's height to window.innerHeight and then updates it on window resizes.

T-SQL and the WHERE LIKE %Parameter% clause

It should be:

...
WHERE LastName LIKE '%' + @LastName + '%';

Instead of:

...
WHERE LastName LIKE '%@LastName%'

How do I find an element position in std::vector?

std::vector has random-access iterators. You can do pointer arithmetic with them. In particular, this my_vec.begin() + my_vec.size() == my_vec.end() always holds. So you could do

const vector<type>::const_iterator pos = std::find_if( firstVector.begin()
                                                     , firstVector.end()
                                                     , some_predicate(parameter) );
if( position != firstVector.end() ) {
    const vector<type>::size_type idx = pos-firstVector.begin();
    doAction( secondVector[idx] );
}

As an alternative, there's always std::numeric_limits<vector<type>::size_type>::max() to be used as an invalid value.

Get refresh token google api

This is complete code in PHP using google official SDK

$client = new Google_Client();
## some need parameter
$client->setApplicationName('your application name');
$client->setClientId('****************');
$client->setClientSecret('************');
$client->setRedirectUri('http://your.website.tld/complete/url2redirect');
$client->setScopes('https://www.googleapis.com/auth/userinfo.email');
## these two lines is important to get refresh token from google api
$client->setAccessType('offline');
$client->setApprovalPrompt('force'); # this line is important when you revoke permission from your app, it will prompt google approval dialogue box forcefully to user to grant offline access

Python 3 ImportError: No module named 'ConfigParser'

I run kali linux- Rolling and I came across this problem ,when I tried running cupp.py in the terminal, after updating to python 3.6.0. After some research and trial I found that changing ConfigParser to configparser worked for me but then I came across another issue.

config = configparser.configparser() AttributeError: module 'configparser' has no attribute 'configparser'

After a bit more research I realised that for python 3 ConfigParser is changed to configparser but note that it has an attribute ConfigParser().

how to implement Pagination in reactJs

I recently created this Pagination component that implements paging logic like Google's search results:

import React, { PropTypes } from 'react';
 
const propTypes = {
    items: PropTypes.array.isRequired,
    onChangePage: PropTypes.func.isRequired,
    initialPage: PropTypes.number   
}
 
const defaultProps = {
    initialPage: 1
}
 
class Pagination extends React.Component {
    constructor(props) {
        super(props);
        this.state = { pager: {} };
    }
 
    componentWillMount() {
        this.setPage(this.props.initialPage);
    }
 
    setPage(page) {
        var items = this.props.items;
        var pager = this.state.pager;
 
        if (page < 1 || page > pager.totalPages) {
            return;
        }
 
        // get new pager object for specified page
        pager = this.getPager(items.length, page);
 
        // get new page of items from items array
        var pageOfItems = items.slice(pager.startIndex, pager.endIndex + 1);
 
        // update state
        this.setState({ pager: pager });
 
        // call change page function in parent component
        this.props.onChangePage(pageOfItems);
    }
 
    getPager(totalItems, currentPage, pageSize) {
        // default to first page
        currentPage = currentPage || 1;
 
        // default page size is 10
        pageSize = pageSize || 10;
 
        // calculate total pages
        var totalPages = Math.ceil(totalItems / pageSize);
 
        var startPage, endPage;
        if (totalPages <= 10) {
            // less than 10 total pages so show all
            startPage = 1;
            endPage = totalPages;
        } else {
            // more than 10 total pages so calculate start and end pages
            if (currentPage <= 6) {
                startPage = 1;
                endPage = 10;
            } else if (currentPage + 4 >= totalPages) {
                startPage = totalPages - 9;
                endPage = totalPages;
            } else {
                startPage = currentPage - 5;
                endPage = currentPage + 4;
            }
        }
 
        // calculate start and end item indexes
        var startIndex = (currentPage - 1) * pageSize;
        var endIndex = Math.min(startIndex + pageSize - 1, totalItems - 1);
 
        // create an array of pages to ng-repeat in the pager control
        var pages = _.range(startPage, endPage + 1);
 
        // return object with all pager properties required by the view
        return {
            totalItems: totalItems,
            currentPage: currentPage,
            pageSize: pageSize,
            totalPages: totalPages,
            startPage: startPage,
            endPage: endPage,
            startIndex: startIndex,
            endIndex: endIndex,
            pages: pages
        };
    }
 
    render() {
        var pager = this.state.pager;
 
        return (
            <ul className="pagination">
                <li className={pager.currentPage === 1 ? 'disabled' : ''}>
                    <a onClick={() => this.setPage(1)}>First</a>
                </li>
                <li className={pager.currentPage === 1 ? 'disabled' : ''}>
                    <a onClick={() => this.setPage(pager.currentPage - 1)}>Previous</a>
                </li>
                {pager.pages.map((page, index) =>
                    <li key={index} className={pager.currentPage === page ? 'active' : ''}>
                        <a onClick={() => this.setPage(page)}>{page}</a>
                    </li>
                )}
                <li className={pager.currentPage === pager.totalPages ? 'disabled' : ''}>
                    <a onClick={() => this.setPage(pager.currentPage + 1)}>Next</a>
                </li>
                <li className={pager.currentPage === pager.totalPages ? 'disabled' : ''}>
                    <a onClick={() => this.setPage(pager.totalPages)}>Last</a>
                </li>
            </ul>
        );
    }
}
 
Pagination.propTypes = propTypes;
Pagination.defaultProps
export default Pagination;

And here's an example App component that uses the Pagination component to paginate a list of 150 example items:

import React from 'react';
import Pagination from './Pagination';
 
class App extends React.Component {
    constructor() {
        super();
 
        // an example array of items to be paged
        var exampleItems = _.range(1, 151).map(i => { return { id: i, name: 'Item ' + i }; });
 
        this.state = {
            exampleItems: exampleItems,
            pageOfItems: []
        };
 
        // bind function in constructor instead of render (https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-bind.md)
        this.onChangePage = this.onChangePage.bind(this);
    }
 
    onChangePage(pageOfItems) {
        // update state with new page of items
        this.setState({ pageOfItems: pageOfItems });
    }
 
    render() {
        return (
            <div>
                <div className="container">
                    <div className="text-center">
                        <h1>React - Pagination Example with logic like Google</h1>
                        {this.state.pageOfItems.map(item =>
                            <div key={item.id}>{item.name}</div>
                        )}
                        <Pagination items={this.state.exampleItems} onChangePage={this.onChangePage} />
                    </div>
                </div>
                <hr />
                <div className="credits text-center">
                    <p>
                        <a href="http://jasonwatmore.com" target="_top">JasonWatmore.com</a>
                    </p>
                </div>
            </div>
        );
    }
}
 
export default App;

For more details and a live demo you can check out this post

Is there a float input type in HTML5?

<input type="number" step="any">

This worked for me and i think is the easiest way to make the input field accept any decimal number irrespective of how long the decimal part is. Step attribute actually shows the input field how many decimal points should be accepted. E.g, step="0.01" will accept only two decimal points.

How to update array value javascript?

So I had a problem I needed solved. I had an array object with values. One of those values I needed to update if the value == X.I needed X value to be updated to the Y value. Looking over examples here none of them worked for what I needed or wanted. I finally figured out a simple solution to the problem and was actually surprised it worked. Now normally I like to put the full code solution into these answers but due to its complexity I wont do that here. If anyone finds they cant make this solution work or need more code let me know and I will attempt to update this at some later date to help. For the most part if the array object has named values this solution should work.

            $scope.model.ticketsArr.forEach(function (Ticket) {
                if (Ticket.AppointmentType == 'CRASH_TECH_SUPPORT') {
                    Ticket.AppointmentType = '360_SUPPORT'
                }
            });

Full example below _____________________________________________________

   var Students = [
        { ID: 1, FName: "Ajay", LName: "Test1", Age: 20 },
        { ID: 2, FName: "Jack", LName: "Test2", Age: 21 },
        { ID: 3, FName: "John", LName: "Test3", age: 22 },
        { ID: 4, FName: "Steve", LName: "Test4", Age: 22 }
    ]

    Students.forEach(function (Student) {
        if (Student.LName == 'Test1') {
            Student.LName = 'Smith'
        }
        if (Student.LName == 'Test2') {
            Student.LName = 'Black'
        }
    });

    Students.forEach(function (Student) {
        document.write(Student.FName + " " + Student.LName + "<BR>");
    });

Git fatal: protocol 'https' is not supported

Edit: This particular users problem was solved by starting a new terminal session.

A ? before the protocol (https) is not support. You want this:

git clone [email protected]:octocat/Spoon-Knife.git

or this:

git clone https://github.com/octocat/Spoon-Knife.git

Selecting the location to clone

How to make a div center align in HTML

I think that the the align="center" aligns the content, so if you wanted to use that method, you would need to use it in a 'wraper' div - a div that just wraps the rest.

text-align is doing a similar sort of thing.

left:50% is ignored unless you set the div's position to be something like relative or absolute.

The generally accepted methods is to use the following properties

width:500px; // this can be what ever unit you want, you just have to define it
margin-left:auto;
margin-right:auto;

the margins being auto means they grow/shrink to match the browser window (or parent div)

UPDATE

Thanks to Meo for poiting this out, if you wanted to you could save time and use the short hand propery for the margin.

margin:0 auto;

this defines the top and bottom as 0 (as it is zero it does not matter about lack of units) and the left and right get defined as 'auto' You can then, if you wan't override say the top margin as you would with any other CSS rules.

How to disable a link using only CSS?

You can set href attribute to javascript:void(0)

_x000D_
_x000D_
.disabled {_x000D_
  /* Disabled link style */_x000D_
  color: black;_x000D_
}
_x000D_
<a class="disabled" href="javascript:void(0)">LINK</a>
_x000D_
_x000D_
_x000D_

How to group pandas DataFrame entries by date in a non-unique column

This should work:

data.groupby(lambda x: data['date'][x].year)

Nested lists python

I think you want to access list values and their indices simultaneously and separately:

l = [[2,2,2],[3,3,3],[4,4,4],[5,5,5]]
l_len = len(l)
l_item_len = len(l[0])
for i in range(l_len):
    for j in range(l_item_len):
        print(f'List[{i}][{j}] : {l[i][j]}'  )

Javascript add leading zeroes to date

Number.prototype.padZero= function(len){
 var s= String(this), c= '0';
 len= len || 2;
 while(s.length < len) s= c + s;
 return s;
}

//in use:

(function(){
 var myDate= new Date(), myDateString;
 myDate.setDate(myDate.getDate()+10);

 myDateString= [myDate.getDate().padZero(),
 (myDate.getMonth()+1).padZero(),
 myDate.getFullYear()].join('/');

 alert(myDateString);
})()

/*  value: (String)
09/09/2010
*/

Cannot make file java.io.IOException: No such file or directory

You may want to use Apache Commons IO's FileUtils.openOutputStream(File) method. It has good Exception messages when something went wrong and also creates necessary parent dirs. If everything was right then you directly get your OutputStream - very neat.

If you just want to touch the file then use FileUtils.touch(File) instead.

What is the difference between a .cpp file and a .h file?

By convention, .h files are included by other files, and never compiled directly by themselves. .cpp files are - again, by convention - the roots of the compilation process; they include .h files directly or indirectly, but generally not .cpp files.

How to add Web API to an existing ASP.NET MVC 4 Web Application project?

As soon as you add a "WebApi Controller" under controllers folder, Visual Studio takes care of dependencies automatically;

Visual Studio has added the full set of dependencies for ASP.NET Web API 2 to project 'MyTestProject'.

The Global.asax.cs file in the project may require additional changes to enable ASP.NET Web API.

  1. Add the following namespace references:

    using System.Web.Http; using System.Web.Routing;

  2. If the code does not already define an Application_Start method, add the following method:

    protected void Application_Start() { }

  3. Add the following lines to the beginning of the Application_Start method:

    GlobalConfiguration.Configure(WebApiConfig.Register);

How to replace a string in a SQL Server Table Column

UPDATE [table]
SET [column] = REPLACE([column], '/foo/', '/bar/')

Calling Javascript function from server side

This works for me. Hope it will work for you too.

ScriptManager.RegisterStartupScript(this, this.GetType(), "isActive", "Test();", true);

I have edited the html page which you have provided. The updated page is as below

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
        <title>My Page</title>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"></script>
        <script type="text/javascript">
            function Test() {
                alert("Hello Test!!!!");
                $('#ButtonRow').css("display", "block");
            }
        </script>
    </head>
    <body>
        <form id="form1" runat="server">
        <table>
            <tr>
                <td>
                    <asp:RadioButtonList ID="SearchCategory" runat="server" RepeatDirection="Horizontal"
                        BorderStyle="Solid">
                        <asp:ListItem>Merchant</asp:ListItem>
                        <asp:ListItem>Store</asp:ListItem>
                        <asp:ListItem>Terminal</asp:ListItem>
                    </asp:RadioButtonList>
                </td>
            </tr>
            <tr id="ButtonRow" style="display: none">
                <td>
                    <asp:Button ID="MyButton" runat="server" Text="Click Here" OnClick="MyButton_Click" />
                </td>
            </tr>
        </table>
        </form>
    </body>
    </html>

    <script type="text/javascript">

        $("#<%=SearchCategory.ClientID%> input").change(function () {
            alert("hi");
            $("#ButtonRow").show();
        });
    </script>

How to get Django and ReactJS to work together?

I know this is a couple of years late, but I'm putting it out there for the next person on this journey.

GraphQL has been helpful and way easier compared to DjangoRESTFramework. It is also more flexible in terms of the responses you get. You get what you ask for and don't have to filter through the response to get what you want.

You can use Graphene Django on the server side and React+Apollo/Relay... You can look into it as that is not your question.

How to pick just one item from a generator?

I don't believe there's a convenient way to retrieve an arbitrary value from a generator. The generator will provide a next() method to traverse itself, but the full sequence is not produced immediately to save memory. That's the functional difference between a generator and a list.

java.io.IOException: Broken pipe

Basically, what is happening is that your user is either closing the browser tab, or is navigating away to a different page, before communication was complete. Your webserver (Jetty) generates this exception because it is unable to send the remaining bytes.

org.eclipse.jetty.io.EofException: null
! at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:914)
! at org.eclipse.jetty.http.HttpGenerator.complete(HttpGenerator.java:798)
! at org.eclipse.jetty.server.AbstractHttpConnection.completeResponse(AbstractHttpConnection.java:642)
! 

This is not an error on your application logic side. This is simply due to user behavior. There is nothing wrong in your code per se.

There are two things you may be able to do:

  1. Ignore this specific exception so that you don't log it.
  2. Make your code more efficient/packed so that it transmits less data. (Not always an option!)

How can I preview a merge in git?

Short of actually performing the merge in a throw away fashion (see Kasapo's answer), there doesn't seem to be a reliable way of seeing this.

Having said that, here's a method that comes marginally close:

git log TARGET_BRANCH...SOURCE_BRANCH --cherry

This gives a fair indication of which commits will make it into the merge. To see diffs, add -p. To see file names, add any of --raw, --stat, --name-only, --name-status.

The problem with the git diff TARGET_BRANCH...SOURCE_BRANCH approach (see Jan Hudec's answer) is, you'll see diffs for changes already in your target branch if your source branch contains cross merges.

Import txt file and having each line as a list

Create a list of lists:

with open("/path/to/file") as file:
    lines = []
    for line in file:
        # The rstrip method gets rid of the "\n" at the end of each line
        lines.append(line.rstrip().split(","))

Declaring and initializing a string array in VB.NET

Public Function TestError() As String()
     Return {"foo", "bar"}
End Function

Works fine for me and should work for you, but you may need allow using implicit declarations in your project. I believe this is turning off Options strict in the Compile section of the program settings.

Since you are using VS 2008 (VB.NET 9.0) you have to declare create the new instance

New String() {"foo", "Bar"}

new Runnable() but no new thread?

Runnable is often used to provide the code that a thread should run, but Runnable itself has nothing to do with threads. It's just an object with a run() method.

In Android, the Handler class can be used to ask the framework to run some code later on the same thread, rather than on a different one. Runnable is used to provide the code that should run later.

Tablix: Repeat header rows on each page not working - Report Builder 3.0

How I fixed this issue was I manually changed the code behind (from the menu View/code). The section below should have as many number of pairs <TablixMember> </TablixMember> as the number of rows are in the tablix. In my case I had more pairs <TablixMember> </TablixMember>than the number of rows in the tablix. Also if you go to "Advanced mode" (to the right of "Column Groups") the number of static lines behind the "Row groups" should be equal to the number of rows in the tablix. The way to make it equal is changing the code.

<TablixRowHierarchy>
      <TablixMembers>
        <TablixMember>
          <KeepWithGroup>After</KeepWithGroup>
          <RepeatOnNewPage>true</RepeatOnNewPage>
        </TablixMember>
        <TablixMember>
          <Group Name="Detail" />
        </TablixMember>
      </TablixMembers>
    </TablixRowHierarchy>

Mockito - difference between doReturn() and when()

The latter alternative is used for methods on mocks that return void.

Please have a look, for example, here: How to make mock to void methods with mockito

How to sort a data frame by date

Nowadays, it is the most efficient and comfortable to use lubridate and dplyr libraries.

lubridate contains a number of functions that make parsing dates into POSIXct or Date objects easy. Here we use dmy which automatically parses dates in Day, Month, Year formats. Once your data is in a date format, you can sort it with dplyr::arrange (or any other ordering function) as desired:

d$V3 <- lubridate::dmy(d$V3)
dplyr::arrange(d, V3)

How can you create pop up messages in a batch script?

With regard to LittleBobbyTable's answer - NET SEND does not work on Vista or Windows 7. It has been replaced by MSG.EXE

There is a crude solution that works on all versions of Windows - A crude popup message can be sent by STARTing a new cmd.exe window that closes once a key is pressed.

start "" cmd /c "echo Hello world!&echo(&pause"

If you want your script to pause until the message box is dismissed, then you can add the /WAIT option.

start "" /wait cmd /c "echo Hello world!&echo(&pause"

onMeasure custom view explanation

onMeasure() is your opportunity to tell Android how big you want your custom view to be dependent the layout constraints provided by the parent; it is also your custom view's opportunity to learn what those layout constraints are (in case you want to behave differently in a match_parent situation than a wrap_content situation). These constraints are packaged up into the MeasureSpec values that are passed into the method. Here is a rough correlation of the mode values:

  • EXACTLY means the layout_width or layout_height value was set to a specific value. You should probably make your view this size. This can also get triggered when match_parent is used, to set the size exactly to the parent view (this is layout dependent in the framework).
  • AT_MOST typically means the layout_width or layout_height value was set to match_parent or wrap_content where a maximum size is needed (this is layout dependent in the framework), and the size of the parent dimension is the value. You should not be any larger than this size.
  • UNSPECIFIED typically means the layout_width or layout_height value was set to wrap_content with no restrictions. You can be whatever size you would like. Some layouts also use this callback to figure out your desired size before determine what specs to actually pass you again in a second measure request.

The contract that exists with onMeasure() is that setMeasuredDimension() MUST be called at the end with the size you would like the view to be. This method is called by all the framework implementations, including the default implementation found in View, which is why it is safe to call super instead if that fits your use case.

Granted, because the framework does apply a default implementation, it may not be necessary for you to override this method, but you may see clipping in cases where the view space is smaller than your content if you do not, and if you lay out your custom view with wrap_content in both directions, your view may not show up at all because the framework doesn't know how large it is!

Generally, if you are overriding View and not another existing widget, it is probably a good idea to provide an implementation, even if it is as simple as something like this:

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    int desiredWidth = 100;
    int desiredHeight = 100;

    int widthMode = MeasureSpec.getMode(widthMeasureSpec);
    int widthSize = MeasureSpec.getSize(widthMeasureSpec);
    int heightMode = MeasureSpec.getMode(heightMeasureSpec);
    int heightSize = MeasureSpec.getSize(heightMeasureSpec);

    int width;
    int height;

    //Measure Width
    if (widthMode == MeasureSpec.EXACTLY) {
        //Must be this size
        width = widthSize;
    } else if (widthMode == MeasureSpec.AT_MOST) {
        //Can't be bigger than...
        width = Math.min(desiredWidth, widthSize);
    } else {
        //Be whatever you want
        width = desiredWidth;
    }

    //Measure Height
    if (heightMode == MeasureSpec.EXACTLY) {
        //Must be this size
        height = heightSize;
    } else if (heightMode == MeasureSpec.AT_MOST) {
        //Can't be bigger than...
        height = Math.min(desiredHeight, heightSize);
    } else {
        //Be whatever you want
        height = desiredHeight;
    }

    //MUST CALL THIS
    setMeasuredDimension(width, height);
}

Hope that Helps.

Determining image file size + dimensions via Javascript?

Getting the Original Dimensions of the Image

If you need to get the original image dimensions (not in the browser context), clientWidth and clientHeight properties do not work since they return incorrect values if the image is stretched/shrunk via css.

To get original image dimensions, use naturalHeight and naturalWidth properties.

var img = document.getElementById('imageId'); 

var width = img.naturalWidth;
var height = img.naturalHeight;

p.s. This does not answer the original question as the accepted answer does the job. This, instead, serves like addition to it.

calculate the mean for each column of a matrix in R

For diversity: Another way is to converts a vector function to one that works with data frames by using plyr::colwise()

set.seed(1)
m <- data.frame(matrix(sample(100, 20, replace = TRUE), ncol = 4))

plyr::colwise(mean)(m)


#   X1   X2   X3   X4
# 1 47 64.4 44.8 67.8

How to convert std::string to lower case?

Try this function :)

string toLowerCase(string str) {

    int str_len = str.length();

    string final_str = "";

    for(int i=0; i<str_len; i++) {

        char character = str[i];

        if(character>=65 && character<=92) {

            final_str += (character+32);

        } else {

            final_str += character;

        }

    }

    return final_str;

}

Linux Command History with date and time

In case you are using zsh you can use for example the -E or -i switch:

history -E

If you do a man zshoptions or man zshbuiltins you can find out more information about these switches as well as other info related to history:

Also when listing,
 -d     prints timestamps for each event
 -f     prints full time-date stamps in the US `MM/DD/YY hh:mm' format
 -E     prints full time-date stamps in the European `dd.mm.yyyy hh:mm' format
 -i     prints full time-date stamps in ISO8601 `yyyy-mm-dd hh:mm' format
 -t fmt prints time and date stamps in the given format; fmt is formatted with the strftime function with the zsh extensions  described  for  the  %D{string} prompt format in the section EXPANSION OF PROMPT SEQUENCES in zshmisc(1).  The resulting formatted string must be no more than 256 characters or will not be printed
 -D     prints elapsed times; may be combined with one of the options above

Calculate distance between two points in google maps V3

//JAVA
    public Double getDistanceBetweenTwoPoints(Double latitude1, Double longitude1, Double latitude2, Double longitude2) {
    final int RADIUS_EARTH = 6371;

    double dLat = getRad(latitude2 - latitude1);
    double dLong = getRad(longitude2 - longitude1);

    double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(getRad(latitude1)) * Math.cos(getRad(latitude2)) * Math.sin(dLong / 2) * Math.sin(dLong / 2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
    return (RADIUS_EARTH * c) * 1000;
    }

    private Double getRad(Double x) {
    return x * Math.PI / 180;
    }

Adding a line break in MySQL INSERT INTO text

If you're OK with a SQL command that spreads across multiple lines, then oedo's suggestion is the easiest:

INSERT INTO mytable (myfield) VALUES ('hi this is some text
and this is a linefeed.
and another');

I just had a situation where it was preferable to have the SQL statement all on one line, so I found that a combination of CONCAT_WS() and CHAR() worked for me.

INSERT INTO mytable (myfield) VALUES (CONCAT_WS(CHAR(10 using utf8), 'hi this is some text', 'and this is a linefeed.', 'and another'));

How to read until end of file (EOF) using BufferedReader in Java?

You are consuming a line at, which is discarded

while((str=input.readLine())!=null && str.length()!=0)

and reading a bigint at

BigInteger n = new BigInteger(input.readLine());

so try getting the bigint from string which is read as

BigInteger n = new BigInteger(str);

   Constructor used: BigInteger(String val)

Aslo change while((str=input.readLine())!=null && str.length()!=0) to

while((str=input.readLine())!=null)

see related post string to bigint

readLine()
Returns:
    A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached 

see javadocs

How can I get the request URL from a Java Filter?

Building on another answer on this page,

public static String getCurrentUrlFromRequest(ServletRequest request)
{
   if (! (request instanceof HttpServletRequest))
       return null;

   return getCurrentUrlFromRequest((HttpServletRequest)request);
}

public static String getCurrentUrlFromRequest(HttpServletRequest request)
{
    StringBuffer requestURL = request.getRequestURL();
    String queryString = request.getQueryString();

    if (queryString == null)
        return requestURL.toString();

    return requestURL.append('?').append(queryString).toString();
}

onclick="location.href='link.html'" does not load page in Safari

I had the same error. Make sure you don't have any <input>, <select>, etc. name="location".

Adjust icon size of Floating action button (fab)

There are three key XML attributes for custom FABs:

  • app:fabSize: Either "mini" (40dp), "normal"(56dp)(default) or "auto"
  • app:fabCustomSize: This will decide the overall FAB size.
  • app:maxImageSize: This will decide the icon size.

Example:

app:fabCustomSize="64dp" 
app:maxImageSize="32dp"

The FAB padding (the space between the icon and the background circle, aka ripple) is calculated implicitly by:

4-edge padding = (fabCustomSize - maxImageSize) / 2.0 = 16

Note that the margins of the fab can be set by the usual android:margin xml tag properties.

Css Move element from left to right animated

It's because you aren't giving the un-hovered state a right attribute.

right isn't set so it's trying to go from nothing to 0px. Obviously because it has nothing to go to, it just 'warps' over.

If you give the unhovered state a right:90%;, it will transition how you like.

Just as a side note, if you still want it to be on the very left of the page, you can use the calc css function.

Example:

right: calc(100% - 100px)
                     ^ width of div

You don't have to use left then.

Also, you can't transition using left or right auto and will give the same 'warp' effect.

_x000D_
_x000D_
div {_x000D_
    width:100px;_x000D_
    height:100px;_x000D_
    background:red;_x000D_
    transition:2s;_x000D_
    -webkit-transition:2s;_x000D_
    -moz-transition:2s;_x000D_
    position:absolute;_x000D_
    right:calc(100% - 100px);_x000D_
}_x000D_
div:hover {_x000D_
  right:0;_x000D_
}
_x000D_
<p>_x000D_
  <b>Note:</b> This example does not work in Internet Explorer 9 and earlier versions._x000D_
</p>_x000D_
<div></div>_x000D_
<p>Hover over the red square to see the transition effect.</p>
_x000D_
_x000D_
_x000D_

CanIUse says that the calc() function only works on IE10+

How to avoid the "Windows Defender SmartScreen prevented an unrecognized app from starting warning"

UPDATE: Another writeup here: How to add publisher in Installshield 2018 (might be better).


I am not too well informed about this issue, but please see if this answer to another question tells you anything useful (and let us know so I can evolve a better answer here): How to pass the Windows Defender SmartScreen Protection? That question relates to BitRock - a non-MSI installer technology, but the overall issue seems to be the same.

Extract from one of the links pointed to in my answer above: "...a certificate just isn't enough anymore to gain trust... SmartScreen is reputation based, not unlike the way StackOverflow works... SmartScreen trusts installers that don't cause problems. Windows machines send telemetry back to Redmond about installed programs and how much trouble they cause. If you get enough thumbs-up then SmartScreen stops blocking your installer automatically. This takes time and lots of installs to get sufficient thumbs. There is no way to find out how far along you got."

Honestly this is all news to me at this point, so do get back to us with any information you dig up yourself.


The actual dialog text you have marked above definitely relates to the Zone.Identifier alternate data stream with a value of 3 that is added to any file that is downloaded from the Internet (see linked answer above for more details).


I was not able to mark this question as a duplicate of the previous one, since it doesn't have an accepted answer. Let's leave both question open for now? (one question is for MSI, one is for non-MSI).

How to Add a Dotted Underline Beneath HTML Text

Use the following CSS codes...

text-decoration:underline;
text-decoration-style: dotted;

Templated check for the existence of a class member function?

The generic template that can be used for checking if some "feature" is supported by the type:

#include <type_traits>

template <template <typename> class TypeChecker, typename Type>
struct is_supported
{
    // these structs are used to recognize which version
    // of the two functions was chosen during overload resolution
    struct supported {};
    struct not_supported {};

    // this overload of chk will be ignored by SFINAE principle
    // if TypeChecker<Type_> is invalid type
    template <typename Type_>
    static supported chk(typename std::decay<TypeChecker<Type_>>::type *);

    // ellipsis has the lowest conversion rank, so this overload will be
    // chosen during overload resolution only if the template overload above is ignored
    template <typename Type_>
    static not_supported chk(...);

    // if the template overload of chk is chosen during
    // overload resolution then the feature is supported
    // if the ellipses overload is chosen the the feature is not supported
    static constexpr bool value = std::is_same<decltype(chk<Type>(nullptr)),supported>::value;
};

The template that checks whether there is a method foo that is compatible with signature double(const char*)

// if T doesn't have foo method with the signature that allows to compile the bellow
// expression then instantiating this template is Substitution Failure (SF)
// which Is Not An Error (INAE) if this happens during overload resolution
template <typename T>
using has_foo = decltype(double(std::declval<T>().foo(std::declval<const char*>())));

Examples

// types that support has_foo
struct struct1 { double foo(const char*); };            // exact signature match
struct struct2 { int    foo(const std::string &str); }; // compatible signature
struct struct3 { float  foo(...); };                    // compatible ellipsis signature
struct struct4 { template <typename T>
                 int    foo(T t); };                    // compatible template signature

// types that do not support has_foo
struct struct5 { void        foo(const char*); }; // returns void
struct struct6 { std::string foo(const char*); }; // std::string can't be converted to double
struct struct7 { double      foo(      int *); }; // const char* can't be converted to int*
struct struct8 { double      bar(const char*); }; // there is no foo method

int main()
{
    std::cout << std::boolalpha;

    std::cout << is_supported<has_foo, int    >::value << std::endl; // false
    std::cout << is_supported<has_foo, double >::value << std::endl; // false

    std::cout << is_supported<has_foo, struct1>::value << std::endl; // true
    std::cout << is_supported<has_foo, struct2>::value << std::endl; // true
    std::cout << is_supported<has_foo, struct3>::value << std::endl; // true
    std::cout << is_supported<has_foo, struct4>::value << std::endl; // true

    std::cout << is_supported<has_foo, struct5>::value << std::endl; // false
    std::cout << is_supported<has_foo, struct6>::value << std::endl; // false
    std::cout << is_supported<has_foo, struct7>::value << std::endl; // false
    std::cout << is_supported<has_foo, struct8>::value << std::endl; // false

    return 0;
}

http://coliru.stacked-crooked.com/a/83c6a631ed42cea4