SyntaxFix

Programs & Examples On #Multibinding

MultiBinding is a XAML tag in Microsoft .NET WPF that enables you to combine multiple sources of data into a single collection of data available for data binding.

How to bind multiple values to a single WPF TextBlock?

If these are just going to be textblocks (and thus one way binding), and you just want to concatenate values, just bind two textblocks and put them in a horizontal stackpanel.

    <StackPanel Orientation="Horizontal">
        <TextBlock Text="{Binding Name}"/>
        <TextBlock Text="{Binding ID}"/>
    </StackPanel>

That will display the text (which is all Textblocks do) without having to do any more coding. You might put a small margin on them to make them look right though.

How to show changed file name only with git log?

Now I use the following to get the list of changed files my current branch has, comparing it to master (the compare-to branch is easily changed):

git log --oneline --pretty="format:" --name-only master.. | awk 'NF' | sort -u

Before, I used to rely on this:

git log --name-status <branch>..<branch> | grep -E '^[A-Z]\b' | sort -k 2,2 -u

which outputs a list of files only and their state (added, modified, deleted):

A   foo/bar/xyz/foo.txt
M   foo/bor/bar.txt
...

The -k2,2 option for sort, makes it sort by file path instead of the type of change (A, M, D,).

Converting UTF-8 to ISO-8859-1 in Java - how to keep it as single byte

If you have the correct encoding in the string, you need not do more to get the bytes for another encoding.

public static void main(String[] args) throws Exception {
    printBytes("â");
    System.out.println(
            new String(new byte[] { (byte) 0xE2 }, "ISO-8859-1"));
    System.out.println(
            new String(new byte[] { (byte) 0xC3, (byte) 0xA2 }, "UTF-8"));
}

private static void printBytes(String str) {
    System.out.println("Bytes in " + str + " with ISO-8859-1");
    for (byte b : str.getBytes(StandardCharsets.ISO_8859_1)) {
        System.out.printf("%3X", b);
    }
    System.out.println();
    System.out.println("Bytes in " + str + " with UTF-8");
    for (byte b : str.getBytes(StandardCharsets.UTF_8)) {
        System.out.printf("%3X", b);
    }
    System.out.println();
}

Output:

Bytes in â with ISO-8859-1
 E2
Bytes in â with UTF-8
 C3 A2
â
â

Convert string to datetime in vb.net

As an alternative, if you put a space between the date and time, DateTime.Parse will recognize the format for you. That's about as simple as you can get it. (If ParseExact was still not being recognized)

Call a React component method from outside

With React17 you can use useImperativeHandle hook.

useImperativeHandle customizes the instance value that is exposed to parent components when using ref. As always, imperative code using refs should be avoided in most cases. useImperativeHandle should be used with forwardRef:

function FancyInput(props, ref) {
    const inputRef = useRef();
    useImperativeHandle(ref, () => ({
        focus: () => {
            inputRef.current.focus();
        }
    }));

    return <input ref={inputRef} ... />;
}

FancyInput = forwardRef(FancyInput);

In this example, a parent component that renders would be able to call inputRef.current.focus().

Maximum packet size for a TCP connection

If you are with Linux machines, "ifconfig eth0 mtu 9000 up" is the command to set the MTU for an interface. However, I have to say, big MTU has some downsides if the network transmission is not so stable, and it may use more kernel space memories.

How can we redirect a Java program console output to multiple files?

To solve the problem I use ${string_prompt} variable. It shows a input dialog when application runs. I can set the date/time manually at that dialog.

  1. Move cursor at the end of file path. enter image description here

  2. Click variables and select string_prompt enter image description here

  3. Select Apply and Run enter image description here enter image description here

Uninstall mongoDB from ubuntu

 
sudo service mongod stop
sudo apt-get purge mongodb-org*
sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongodb

this worked for me

How do I best silence a warning about unused variables?

doesn't flag these warnings by default. This warning must have been turned on either explicitly by passing -Wunused-parameter to the compiler or implicitly by passing -Wall -Wextra (or possibly some other combination of flags).

Unused parameter warnings can simply be suppressed by passing -Wno-unused-parameter to the compiler, but note that this disabling flag must come after any possible enabling flags for this warning in the compiler command line, so that it can take effect.

Set style for TextView programmatically

Dynamically changing styles is not supported (yet). You have to set the style before the view gets created, via XML.

List of Timezone IDs for use with FindTimeZoneById() in C#?

And if you'd like a HTML select with the Windows time zones in:

<select>
<option value="Morocco Standard Time">(GMT) Casablanca</option>
<option value="GMT Standard Time">(GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London</option>
<option value="Greenwich Standard Time">(GMT) Monrovia, Reykjavik</option>
<option value="W. Europe Standard Time">(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna</option>
<option value="Central Europe Standard Time">(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague</option>
<option value="Romance Standard Time">(GMT+01:00) Brussels, Copenhagen, Madrid, Paris</option>
<option value="Central European Standard Time">(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb</option>
<option value="W. Central Africa Standard Time">(GMT+01:00) West Central Africa</option>
<option value="Jordan Standard Time">(GMT+02:00) Amman</option>
<option value="GTB Standard Time">(GMT+02:00) Athens, Bucharest, Istanbul</option>
<option value="Middle East Standard Time">(GMT+02:00) Beirut</option>
<option value="Egypt Standard Time">(GMT+02:00) Cairo</option>
<option value="South Africa Standard Time">(GMT+02:00) Harare, Pretoria</option>
<option value="FLE Standard Time">(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius</option>
<option value="Israel Standard Time">(GMT+02:00) Jerusalem</option>
<option value="E. Europe Standard Time">(GMT+02:00) Minsk</option>
<option value="Namibia Standard Time">(GMT+02:00) Windhoek</option>
<option value="Arabic Standard Time">(GMT+03:00) Baghdad</option>
<option value="Arab Standard Time">(GMT+03:00) Kuwait, Riyadh</option>
<option value="Russian Standard Time">(GMT+03:00) Moscow, St. Petersburg, Volgograd</option>
<option value="E. Africa Standard Time">(GMT+03:00) Nairobi</option>
<option value="Georgian Standard Time">(GMT+03:00) Tbilisi</option>
<option value="Iran Standard Time">(GMT+03:30) Tehran</option>
<option value="Arabian Standard Time">(GMT+04:00) Abu Dhabi, Muscat</option>
<option value="Azerbaijan Standard Time">(GMT+04:00) Baku</option>
<option value="Mauritius Standard Time">(GMT+04:00) Port Louis</option>
<option value="Caucasus Standard Time">(GMT+04:00) Yerevan</option>
<option value="Afghanistan Standard Time">(GMT+04:30) Kabul</option>
<option value="Ekaterinburg Standard Time">(GMT+05:00) Ekaterinburg</option>
<option value="Pakistan Standard Time">(GMT+05:00) Islamabad, Karachi</option>
<option value="West Asia Standard Time">(GMT+05:00) Tashkent</option>
<option value="India Standard Time">(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi</option>
<option value="Sri Lanka Standard Time">(GMT+05:30) Sri Jayawardenepura</option>
<option value="Nepal Standard Time">(GMT+05:45) Kathmandu</option>
<option value="N. Central Asia Standard Time">(GMT+06:00) Almaty, Novosibirsk</option>
<option value="Central Asia Standard Time">(GMT+06:00) Astana, Dhaka</option>
<option value="Myanmar Standard Time">(GMT+06:30) Yangon (Rangoon)</option>
<option value="SE Asia Standard Time">(GMT+07:00) Bangkok, Hanoi, Jakarta</option>
<option value="North Asia Standard Time">(GMT+07:00) Krasnoyarsk</option>
<option value="China Standard Time">(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi</option>
<option value="North Asia East Standard Time">(GMT+08:00) Irkutsk, Ulaan Bataar</option>
<option value="Singapore Standard Time">(GMT+08:00) Kuala Lumpur, Singapore</option>
<option value="W. Australia Standard Time">(GMT+08:00) Perth</option>
<option value="Taipei Standard Time">(GMT+08:00) Taipei</option>
<option value="Tokyo Standard Time">(GMT+09:00) Osaka, Sapporo, Tokyo</option>
<option value="Korea Standard Time">(GMT+09:00) Seoul</option>
<option value="Yakutsk Standard Time">(GMT+09:00) Yakutsk</option>
<option value="Cen. Australia Standard Time">(GMT+09:30) Adelaide</option>
<option value="AUS Central Standard Time">(GMT+09:30) Darwin</option>
<option value="E. Australia Standard Time">(GMT+10:00) Brisbane</option>
<option value="AUS Eastern Standard Time">(GMT+10:00) Canberra, Melbourne, Sydney</option>
<option value="West Pacific Standard Time">(GMT+10:00) Guam, Port Moresby</option>
<option value="Tasmania Standard Time">(GMT+10:00) Hobart</option>
<option value="Vladivostok Standard Time">(GMT+10:00) Vladivostok</option>
<option value="Central Pacific Standard Time">(GMT+11:00) Magadan, Solomon Is., New Caledonia</option>
<option value="New Zealand Standard Time">(GMT+12:00) Auckland, Wellington</option>
<option value="Fiji Standard Time">(GMT+12:00) Fiji, Kamchatka, Marshall Is.</option>
<option value="Tonga Standard Time">(GMT+13:00) Nuku'alofa</option>
<option value="Azores Standard Time">(GMT-01:00) Azores</option>
<option value="Cape Verde Standard Time">(GMT-01:00) Cape Verde Is.</option>
<option value="Mid-Atlantic Standard Time">(GMT-02:00) Mid-Atlantic</option>
<option value="E. South America Standard Time">(GMT-03:00) Brasilia</option>
<option value="Argentina Standard Time">(GMT-03:00) Buenos Aires</option>
<option value="SA Eastern Standard Time">(GMT-03:00) Georgetown</option>
<option value="Greenland Standard Time">(GMT-03:00) Greenland</option>
<option value="Montevideo Standard Time">(GMT-03:00) Montevideo</option>
<option value="Newfoundland Standard Time">(GMT-03:30) Newfoundland</option>
<option value="Atlantic Standard Time">(GMT-04:00) Atlantic Time (Canada)</option>
<option value="SA Western Standard Time">(GMT-04:00) La Paz</option>
<option value="Central Brazilian Standard Time">(GMT-04:00) Manaus</option>
<option value="Pacific SA Standard Time">(GMT-04:00) Santiago</option>
<option value="Venezuela Standard Time">(GMT-04:30) Caracas</option>
<option value="SA Pacific Standard Time">(GMT-05:00) Bogota, Lima, Quito, Rio Branco</option>
<option value="Eastern Standard Time">(GMT-05:00) Eastern Time (US & Canada)</option>
<option value="US Eastern Standard Time">(GMT-05:00) Indiana (East)</option>
<option value="Central America Standard Time">(GMT-06:00) Central America</option>
<option value="Central Standard Time">(GMT-06:00) Central Time (US & Canada)</option>
<option value="Central Standard Time (Mexico)">(GMT-06:00) Guadalajara, Mexico City, Monterrey</option>
<option value="Canada Central Standard Time">(GMT-06:00) Saskatchewan</option>
<option value="US Mountain Standard Time">(GMT-07:00) Arizona</option>
<option value="Mountain Standard Time (Mexico)">(GMT-07:00) Chihuahua, La Paz, Mazatlan</option>
<option value="Mountain Standard Time">(GMT-07:00) Mountain Time (US & Canada)</option>
<option value="Pacific Standard Time">(GMT-08:00) Pacific Time (US & Canada)</option>
<option value="Pacific Standard Time (Mexico)">(GMT-08:00) Tijuana, Baja California</option>
<option value="Alaskan Standard Time">(GMT-09:00) Alaska</option>
<option value="Hawaiian Standard Time">(GMT-10:00) Hawaii</option>
<option value="Samoa Standard Time">(GMT-11:00) Midway Island, Samoa</option>
<option value="Dateline Standard Time">(GMT-12:00) International Date Line West</option>
</select>

And if you'd like to use it in C#.NET MVC in a Razor view:

var timezones = new List<SelectListItem> { 
new SelectListItem() { Value="", Text="Select timezone...", Selected = false },
new SelectListItem() { Value="Morocco Standard Time", Text="(GMT) Casablanca", Selected = false },
new SelectListItem() { Value="GMT Standard Time", Text="(GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London", Selected = false },
new SelectListItem() { Value="Greenwich Standard Time", Text="(GMT) Monrovia, Reykjavik", Selected = false },
new SelectListItem() { Value="W. Europe Standard Time", Text="(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna", Selected = false },
new SelectListItem() { Value="Central Europe Standard Time", Text="(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague", Selected = false },
new SelectListItem() { Value="Romance Standard Time", Text="(GMT+01:00) Brussels, Copenhagen, Madrid, Paris", Selected = false },
new SelectListItem() { Value="Central European Standard Time", Text="(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb", Selected = false },
new SelectListItem() { Value="W. Central Africa Standard Time", Text="(GMT+01:00) West Central Africa", Selected = false },
new SelectListItem() { Value="Jordan Standard Time", Text="(GMT+02:00) Amman", Selected = false },
new SelectListItem() { Value="GTB Standard Time", Text="(GMT+02:00) Athens, Bucharest, Istanbul", Selected = false },
new SelectListItem() { Value="Middle East Standard Time", Text="(GMT+02:00) Beirut", Selected = false },
new SelectListItem() { Value="Egypt Standard Time", Text="(GMT+02:00) Cairo", Selected = false },
new SelectListItem() { Value="South Africa Standard Time", Text="(GMT+02:00) Harare, Pretoria", Selected = false },
new SelectListItem() { Value="FLE Standard Time", Text="(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius", Selected = false },
new SelectListItem() { Value="Israel Standard Time", Text="(GMT+02:00) Jerusalem", Selected = false },
new SelectListItem() { Value="E. Europe Standard Time", Text="(GMT+02:00) Minsk", Selected = false },
new SelectListItem() { Value="Namibia Standard Time", Text="(GMT+02:00) Windhoek", Selected = false },
new SelectListItem() { Value="Arabic Standard Time", Text="(GMT+03:00) Baghdad", Selected = false },
new SelectListItem() { Value="Arab Standard Time", Text="(GMT+03:00) Kuwait, Riyadh", Selected = false },
new SelectListItem() { Value="Russian Standard Time", Text="(GMT+03:00) Moscow, St. Petersburg, Volgograd", Selected = false },
new SelectListItem() { Value="E. Africa Standard Time", Text="(GMT+03:00) Nairobi", Selected = false },
new SelectListItem() { Value="Georgian Standard Time", Text="(GMT+03:00) Tbilisi", Selected = false },
new SelectListItem() { Value="Iran Standard Time", Text="(GMT+03:30) Tehran", Selected = false },
new SelectListItem() { Value="Arabian Standard Time", Text="(GMT+04:00) Abu Dhabi, Muscat", Selected = false },
new SelectListItem() { Value="Azerbaijan Standard Time", Text="(GMT+04:00) Baku", Selected = false },
new SelectListItem() { Value="Mauritius Standard Time", Text="(GMT+04:00) Port Louis", Selected = false },
new SelectListItem() { Value="Caucasus Standard Time", Text="(GMT+04:00) Yerevan", Selected = false },
new SelectListItem() { Value="Afghanistan Standard Time", Text="(GMT+04:30) Kabul", Selected = false },
new SelectListItem() { Value="Ekaterinburg Standard Time", Text="(GMT+05:00) Ekaterinburg", Selected = false },
new SelectListItem() { Value="Pakistan Standard Time", Text="(GMT+05:00) Islamabad, Karachi", Selected = false },
new SelectListItem() { Value="West Asia Standard Time", Text="(GMT+05:00) Tashkent", Selected = false },
new SelectListItem() { Value="India Standard Time", Text="(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi", Selected = false },
new SelectListItem() { Value="Sri Lanka Standard Time", Text="(GMT+05:30) Sri Jayawardenepura", Selected = false },
new SelectListItem() { Value="Nepal Standard Time", Text="(GMT+05:45) Kathmandu", Selected = false },
new SelectListItem() { Value="N. Central Asia Standard Time", Text="(GMT+06:00) Almaty, Novosibirsk", Selected = false },
new SelectListItem() { Value="Central Asia Standard Time", Text="(GMT+06:00) Astana, Dhaka", Selected = false },
new SelectListItem() { Value="Myanmar Standard Time", Text="(GMT+06:30) Yangon (Rangoon)", Selected = false },
new SelectListItem() { Value="SE Asia Standard Time", Text="(GMT+07:00) Bangkok, Hanoi, Jakarta", Selected = false },
new SelectListItem() { Value="North Asia Standard Time", Text="(GMT+07:00) Krasnoyarsk", Selected = false },
new SelectListItem() { Value="China Standard Time", Text="(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi", Selected = false },
new SelectListItem() { Value="North Asia East Standard Time", Text="(GMT+08:00) Irkutsk, Ulaan Bataar", Selected = false },
new SelectListItem() { Value="Singapore Standard Time", Text="(GMT+08:00) Kuala Lumpur, Singapore", Selected = false },
new SelectListItem() { Value="W. Australia Standard Time", Text="(GMT+08:00) Perth", Selected = false },
new SelectListItem() { Value="Taipei Standard Time", Text="(GMT+08:00) Taipei", Selected = false },
new SelectListItem() { Value="Tokyo Standard Time", Text="(GMT+09:00) Osaka, Sapporo, Tokyo", Selected = false },
new SelectListItem() { Value="Korea Standard Time", Text="(GMT+09:00) Seoul", Selected = false },
new SelectListItem() { Value="Yakutsk Standard Time", Text="(GMT+09:00) Yakutsk", Selected = false },
new SelectListItem() { Value="Cen. Australia Standard Time", Text="(GMT+09:30) Adelaide", Selected = false },
new SelectListItem() { Value="AUS Central Standard Time", Text="(GMT+09:30) Darwin", Selected = false },
new SelectListItem() { Value="E. Australia Standard Time", Text="(GMT+10:00) Brisbane", Selected = false },
new SelectListItem() { Value="AUS Eastern Standard Time", Text="(GMT+10:00) Canberra, Melbourne, Sydney", Selected = false },
new SelectListItem() { Value="West Pacific Standard Time", Text="(GMT+10:00) Guam, Port Moresby", Selected = false },
new SelectListItem() { Value="Tasmania Standard Time", Text="(GMT+10:00) Hobart", Selected = false },
new SelectListItem() { Value="Vladivostok Standard Time", Text="(GMT+10:00) Vladivostok", Selected = false },
new SelectListItem() { Value="Central Pacific Standard Time", Text="(GMT+11:00) Magadan, Solomon Is., New Caledonia", Selected = false },
new SelectListItem() { Value="New Zealand Standard Time", Text="(GMT+12:00) Auckland, Wellington", Selected = false },
new SelectListItem() { Value="Fiji Standard Time", Text="(GMT+12:00) Fiji, Kamchatka, Marshall Is.", Selected = false },
new SelectListItem() { Value="Tonga Standard Time", Text="(GMT+13:00) Nuku'alofa", Selected = false },
new SelectListItem() { Value="Azores Standard Time", Text="(GMT-01:00) Azores", Selected = false },
new SelectListItem() { Value="Cape Verde Standard Time", Text="(GMT-01:00) Cape Verde Is.", Selected = false },
new SelectListItem() { Value="Mid-Atlantic Standard Time", Text="(GMT-02:00) Mid-Atlantic", Selected = false },
new SelectListItem() { Value="E. South America Standard Time", Text="(GMT-03:00) Brasilia", Selected = false },
new SelectListItem() { Value="Argentina Standard Time", Text="(GMT-03:00) Buenos Aires", Selected = false },
new SelectListItem() { Value="SA Eastern Standard Time", Text="(GMT-03:00) Georgetown", Selected = false },
new SelectListItem() { Value="Greenland Standard Time", Text="(GMT-03:00) Greenland", Selected = false },
new SelectListItem() { Value="Montevideo Standard Time", Text="(GMT-03:00) Montevideo", Selected = false },
new SelectListItem() { Value="Newfoundland Standard Time", Text="(GMT-03:30) Newfoundland", Selected = false },
new SelectListItem() { Value="Atlantic Standard Time", Text="(GMT-04:00) Atlantic Time (Canada)", Selected = false },
new SelectListItem() { Value="SA Western Standard Time", Text="(GMT-04:00) La Paz", Selected = false },
new SelectListItem() { Value="Central Brazilian Standard Time", Text="(GMT-04:00) Manaus", Selected = false },
new SelectListItem() { Value="Pacific SA Standard Time", Text="(GMT-04:00) Santiago", Selected = false },
new SelectListItem() { Value="Venezuela Standard Time", Text="(GMT-04:30) Caracas", Selected = false },
new SelectListItem() { Value="SA Pacific Standard Time", Text="(GMT-05:00) Bogota, Lima, Quito, Rio Branco", Selected = false },
new SelectListItem() { Value="Eastern Standard Time", Text="(GMT-05:00) Eastern Time (US & Canada)", Selected = false },
new SelectListItem() { Value="US Eastern Standard Time", Text="(GMT-05:00) Indiana (East)", Selected = false },
new SelectListItem() { Value="Central America Standard Time", Text="(GMT-06:00) Central America", Selected = false },
new SelectListItem() { Value="Central Standard Time", Text="(GMT-06:00) Central Time (US & Canada)", Selected = false },
new SelectListItem() { Value="Central Standard Time (Mexico)", Text="(GMT-06:00) Guadalajara, Mexico City, Monterrey", Selected = false },
new SelectListItem() { Value="Canada Central Standard Time", Text="(GMT-06:00) Saskatchewan", Selected = false },
new SelectListItem() { Value="US Mountain Standard Time", Text="(GMT-07:00) Arizona", Selected = false },
new SelectListItem() { Value="Mountain Standard Time (Mexico)", Text="(GMT-07:00) Chihuahua, La Paz, Mazatlan", Selected = false },
new SelectListItem() { Value="Mountain Standard Time", Text="(GMT-07:00) Mountain Time (US & Canada)", Selected = false },
new SelectListItem() { Value="Pacific Standard Time", Text="(GMT-08:00) Pacific Time (US & Canada)", Selected = false },
new SelectListItem() { Value="Pacific Standard Time (Mexico)", Text="(GMT-08:00) Tijuana, Baja California", Selected = false },
new SelectListItem() { Value="Alaskan Standard Time", Text="(GMT-09:00) Alaska", Selected = false },
new SelectListItem() { Value="Hawaiian Standard Time", Text="(GMT-10:00) Hawaii", Selected = false },
new SelectListItem() { Value="Samoa Standard Time", Text="(GMT-11:00) Midway Island, Samoa", Selected = false },
new SelectListItem() { Value="Dateline Standard Time", Text="(GMT-12:00) International Date Line West", Selected = false }
}

Although for Razor you can of course just generate the options by looping through TimeZoneInfo.GetSystemTimeZones()

What are the differences between WCF and ASMX web services?

ASMX Web services can only be invoked by HTTP (traditional webservice with .asmx). While WCF Service or a WCF component can be invoked by any protocol (like http, tcp etc.) and any transport type.

Second, ASMX web services are not flexible. However, WCF Services are flexible. If you make a new version of the service then you need to just expose a new end. Therefore, services are agile and which is a very practical approach looking at the current business trends.

We develop WCF as contracts, interface, operations, and data contracts. As the developer we are more focused on the business logic services and need not worry about channel stack. WCF is a unified programming API for any kind of services so we create the service and use configuration information to set up the communication mechanism like HTTP/TCP/MSMQ etc

Angularjs autocomplete from $http

I made an autocomplete directive and uploaded it to GitHub. It should also be able to handle data from an HTTP-Request.

Here's the demo: http://justgoscha.github.io/allmighty-autocomplete/ And here the documentation and repository: https://github.com/JustGoscha/allmighty-autocomplete

So basically you have to return a promise when you want to get data from an HTTP request, that gets resolved when the data is loaded. Therefore you have to inject the $qservice/directive/controller where you issue your HTTP Request.

Example: 

function getMyHttpData(){
  var deferred = $q.defer();
  $http.jsonp(request).success(function(data){
    // the promise gets resolved with the data from HTTP
    deferred.resolve(data);
  });
  // return the promise
  return deferred.promise;
}

I hope this helps.

How to delete mysql database through shell command

Try the following command:

mysqladmin -h[hostname/localhost] -u[username] -p[password] drop [database]

Storing sex (gender) in database

I would go with Option 3 but multiple NON NULLABLE bit columns instead of one. IsMale (1=Yes / 0=No) IsFemale (1=Yes / 0=No)

if requried: IsUnknownGender (1=Yes / 0=No) and so on...

This makes for easy reading of the definitions, easy extensibility, easy programmability, no possibility of using values outside the domain and no requirement of a second lookup table+FK or CHECK constraints to lock down the values.

EDIT: Correction, you do need at least one constraint to ensure the set flags are valid.

Moment JS start and end of given month

Don't really think there is some direct method to get the last day but you could do something like this:

var dateInst = new moment();
/**
 * adding 1 month from the present month and then subtracting 1 day, 
 * So you would get the last day of this month 
 */
dateInst.add(1, 'months').date(1).subtract(1, 'days');
/* printing the last day of this month's date */
console.log(dateInst.format('YYYY MM DD'));

Check Postgres access for a user

For all users on a specific database, do the following:

# psql
\c your_database
select grantee, table_catalog, privilege_type, table_schema, table_name from information_schema.table_privileges order by grantee, table_schema, table_name;

When or Why to use a "SET DEFINE OFF" in Oracle Database

Here is the example:

SQL> set define off;
SQL> select * from dual where dummy='&var';

no rows selected

SQL> set define on
SQL> /
Enter value for var: X
old   1: select * from dual where dummy='&var'
new   1: select * from dual where dummy='X'

D
-
X

With set define off, it took a row with &var value, prompted a user to enter a value for it and replaced &var with the entered value (in this case, X).

How to get correlation of two vectors in python

The docs indicate that numpy.correlate is not what you are looking for:

numpy.correlate(a, v, mode='valid', old_behavior=False)[source]
  Cross-correlation of two 1-dimensional sequences.
  This function computes the correlation as generally defined in signal processing texts:
     z[k] = sum_n a[n] * conj(v[n+k])
  with a and v sequences being zero-padded where necessary and conj being the conjugate.

Instead, as the other comments suggested, you are looking for a Pearson correlation coefficient. To do this with scipy try:

from scipy.stats.stats import pearsonr   
a = [1,4,6]
b = [1,2,3]   
print pearsonr(a,b)

This gives

(0.99339926779878274, 0.073186395040328034)

You can also use numpy.corrcoef:

import numpy
print numpy.corrcoef(a,b)

This gives:

[[ 1.          0.99339927]
 [ 0.99339927  1.        ]]

Oracle date "Between" Query

As APC rightly pointed out, your start_date column appears to be a TIMESTAMP but it could be a TIMESTAMP WITH LOCAL TIMEZONE or TIMESTAMP WITH TIMEZONE datatype too. These could well influence any queries you were doing on the data if your database server was in a different timezone to yourself. However, let's keep this simple and assume you are in the same timezone as your server. First, to give you the confidence, check that the start_date is a TIMESTAMP data type.

Use the SQLPlus DESCRIBE command (or the equivalent in your IDE) to verify this column is a TIMESTAMP data type.

eg

DESCRIBE mytable

Should report :

Name        Null? Type
----------- ----- ------------
NAME              VARHAR2(20) 
START_DATE        TIMESTAMP

If it is reported as a Type = TIMESTAMP then you can query your date ranges with simplest TO_TIMESTAMP date conversion, one which requires no argument (or picture).

We use TO_TIMESTAMP to ensure that any index on the START_DATE column is considered by the optimizer. APC's answer also noted that a function based index could have been created on this column and that would influence the SQL predicate but we cannot comment on that in this query. If you want to know how to find out what indexes have been applied to table, post another question and we can answer that separately.

So, assuming there is an index on start_date, which is a TIMESTAMP datatype and you want the optimizer to consider it, your SQL would be : 

select * from mytable where start_date between to_timestamp('15-JAN-10') AND to_timestamp('17-JAN-10')+.9999999

+.999999999 is very close to but isn't quite 1 so the conversion of 17-JAN-10 will be as close to midnight on that day as possible, therefore you query returns both rows.

The database will see the BETWEEN as from 15-JAN-10 00:00:00:0000000 to 17-JAN-10 23:59:59:99999 and will therefore include all dates from 15th,16th and 17th Jan 2010 whatever the time component of the timestamp.

Hope that helps.

Dazzer

You seem to not be depending on "@angular/core". This is an error

Below steps worked for me:

1) Delete the node_modules/ folder and package-lock.json file.

2) npm install

3) ng serve

How to get POSTed JSON in Flask?

Assuming you've posted valid JSON with the application/json content type, request.json will have the parsed JSON data.

from flask import Flask, request, jsonify

app = Flask(__name__)


@app.route('/echo', methods=['POST'])
def hello():
   return jsonify(request.json)

How to update Git clone

If you want to fetch + merge, run

git pull

if you want simply to fetch :

git fetch

How to print out all the elements of a List in Java?

The objects in the list must have toString implemented for them to print something meaningful to screen.

Here's a quick test to see the differences:

public class Test {

    public class T1 {
        public Integer x;
    }

    public class T2 {
        public Integer x;

        @Override
        public String toString() {
            return x.toString();
        }
    }

    public void run() {
        T1 t1 = new T1();
        t1.x = 5;
        System.out.println(t1);

        T2 t2 = new T2();
        t2.x = 5;
        System.out.println(t2);

    }

    public static void main(String[] args) {        
        new Test().run();
    }
}

And when this executes, the results printed to screen are:

t1 = Test$T1@19821f
t2 = 5

Since T1 does not override the toString method, its instance t1 prints out as something that isn't very useful. On the other hand, T2 overrides toString, so we control what it prints when it is used in I/O, and we see something a little better on screen.

How to remove application from app listings on Android Developer Console

There is strictly no service provided yet from Google Store to delete/remove production app and also you can't change production build for best test.

No line-break after a hyphen

IE8/9 render the non-breaking hyphen mentioned in CanSpice's answer longer than a typical hyphen. It is the length of an en-dash instead of a typical hyphen. This display difference was a deal breaker for me.

As I could not use the CSS answer specified by Deb I instead opted to use no break tags.

<nobr>e-mail</nobr>

In addition I found a specific scenario that caused IE8/9 to break on a hyphen.

  • A string contains words separated by non-breaking spaces - &nbsp;
  • Width is limited
  • Contains a dash

IE renders it like this.

Example of hyphen breaking in IE8/9

The following code reproduces the problem pictured above. I had to use a meta tag to force rendering to IE9 as IE10 has fixed the issue. No fiddle because it does not support meta tags.

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta http-equiv="X-UA-Compatible" content="IE=9" />
        <meta charset="utf-8"/>
        <style>
            body { padding: 20px; }
            div { width: 300px; border: 1px solid gray; }
        </style>
    </head>
    <body>
        <div>      
            <p>If&nbsp;there&nbsp;is&nbsp;a&nbsp;-&nbsp;and&nbsp;words&nbsp;are&nbsp;separated&nbsp;by&nbsp;the&nbsp;whitespace&nbsp;code&nbsp;&amp;nbsp;&nbsp;then&nbsp;IE&nbsp;will&nbsp;wrap&nbsp;on&nbsp;the&nbsp;dash.</p>
        </div>
    </body>
</html>

HTML5 iFrame Seamless Attribute

It is possible to use the semless attribute right now, here i found a german article http://www.solife.cc/blog/html5-iframe-attribut-seamless-beispiele.html

and here are another presentation about this topic: http://benvinegar.github.com/seamless-talk/

You have to use the window.postMessage method to communicate between the parent and the iframe.

How to pull specific directory with git

Sometimes, you just want to have a look at previous copies of files without the rigmarole of going through the diffs.

In such a case, it's just as easy to make a clone of a repository and checkout the specific commit that you are interested in and have a look at the subdirectory in that cloned repository. Because everything is local you can just delete this clone when you are done.

Split string into individual words Java

Yet another method, using StringTokenizer :

String s = "I want to walk my dog";
StringTokenizer tokenizer = new StringTokenizer(s);

while(tokenizer.hasMoreTokens()) {
    System.out.println(tokenizer.nextToken());
}

Making a Sass mixin with optional arguments

You can always assign null to your optional arguments. Here is a simple fix

@mixin box-shadow($top, $left, $blur, $color, $inset:null) { //assigning null to inset value makes it optional
    -webkit-box-shadow: $top $left $blur $color $inset;
    -moz-box-shadow: $top $left $blur $color $inset;
    box-shadow: $top $left $blur $color $inset;
}

CryptographicException 'Keyset does not exist', but only through WCF

I was getting the error : CryptographicException 'Keyset does not exist' when i run the MVC application.

Solution was : to give access to the personal certificates to the account that application pool is running under. In my case it was to add IIS_IUSRS and choosing the right location resolved this issue.

RC on the Certificate - > All tasks -> Manage Private Keys -> Add->  
For the From this location : Click on Locations and make sure to select the Server name. 
In the Enter the object names to select : IIS_IUSRS and click ok.

Matplotlib: Specify format of floats for tick labels

See the relevant documentation in general and specifically

from matplotlib.ticker import FormatStrFormatter

fig, ax = plt.subplots()

ax.yaxis.set_major_formatter(FormatStrFormatter('%.2f'))

enter image description here

Excel VBA to Export Selected Sheets to PDF

this is what i came up with as i was having issues with @asp8811 answer(maybe my own difficulties)

' this will do the put the first 2 sheets in a pdf ' Note each ws should be controlled with page breaks for printing which is a bit fiddly ' this will explicitly put the pdf in the current dir

Sub luxation2()
    Dim Filename As String
    Filename = "temp201"



Dim shtAry()
ReDim shtAry(1) ' this is an array of length 2
For i = 1 To 2
shtAry(i - 1) = Sheets(i).Name
Debug.Print Sheets(i).Name
Next i
Sheets(shtAry).Select
Debug.Print ThisWorkbook.Path & "\"


    ActiveSheet.ExportAsFixedFormat xlTypePDF, ThisWorkbook.Path & "/" & Filename & ".pdf", , , False

End Sub

Concrete Javascript Regex for Accented Characters (Diacritics)

How about this?

/^[a-zA-ZÀ-ÖØ-öø-ÿ]+$/

Passing arguments to "make run"

anon, run: ./prog looks a bit strange, as right part should be a target, so run: prog looks better.

I would suggest simply:

.PHONY: run

run:
        prog $(arg1)

and I would like to add, that arguments can be passed:

  1. as argument: make arg1="asdf" run
  2. or be defined as environment: arg1="asdf" make run

How do I split a string so I can access item x?

 


    Alter Function dbo.fn_Split
    (
    @Expression nvarchar(max),
    @Delimiter  nvarchar(20) = ',',
    @Qualifier  char(1) = Null
    )
    RETURNS @Results TABLE (id int IDENTITY(1,1), value nvarchar(max))
    AS
    BEGIN
       /* USAGE
            Select * From dbo.fn_Split('apple pear grape banana orange honeydew cantalope 3 2 1 4', ' ', Null)
            Select * From dbo.fn_Split('1,abc,"Doe, John",4', ',', '"')
            Select * From dbo.fn_Split('Hello 0,"&""&&&&', ',', '"')
       */

       -- Declare Variables
       DECLARE
          @X     xml,
          @Temp  nvarchar(max),
          @Temp2 nvarchar(max),
          @Start int,
          @End   int

       -- HTML Encode @Expression
       Select @Expression = (Select @Expression For XML Path(''))

       -- Find all occurences of @Delimiter within @Qualifier and replace with |||***|||
       While PATINDEX('%' + @Qualifier + '%', @Expression) > 0 AND Len(IsNull(@Qualifier, '')) > 0
       BEGIN
          Select
             -- Starting character position of @Qualifier
             @Start = PATINDEX('%' + @Qualifier + '%', @Expression),
             -- @Expression starting at the @Start position
             @Temp = SubString(@Expression, @Start + 1, LEN(@Expression)-@Start+1),
             -- Next position of @Qualifier within @Expression
             @End = PATINDEX('%' + @Qualifier + '%', @Temp) - 1,
             -- The part of Expression found between the @Qualifiers
             @Temp2 = Case When @End < 0 Then @Temp Else Left(@Temp, @End) End,
             -- New @Expression
             @Expression = REPLACE(@Expression,
                                   @Qualifier + @Temp2 + Case When @End < 0 Then '' Else @Qualifier End,
                                   Replace(@Temp2, @Delimiter, '|||***|||')
                           )
       END

       -- Replace all occurences of @Delimiter within @Expression with '</fn_Split><fn_Split>'
       -- And convert it to XML so we can select from it
       SET
          @X = Cast('<fn_Split>' +
                    Replace(@Expression, @Delimiter, '</fn_Split><fn_Split>') +
                    '</fn_Split>' as xml)

       -- Insert into our returnable table replacing '|||***|||' back to @Delimiter
       INSERT @Results
       SELECT
          "Value" = LTRIM(RTrim(Replace(C.value('.', 'nvarchar(max)'), '|||***|||', @Delimiter)))
       FROM
          @X.nodes('fn_Split') as X(C)

       -- Return our temp table
       RETURN
    END

How to get first and last day of week in Oracle?

Another solution is 

SELECT 
  ROUND((TRUNC(SYSDATE) - TRUNC(SYSDATE, 'YEAR')) / 7,0) CANTWEEK,
  NEXT_DAY(SYSDATE, 'SUNDAY') - 7 FIRSTDAY,
  NEXT_DAY(SYSDATE, 'SUNDAY') - 1 LASTDAY
FROM DUAL

You must concat the cantweek with the year

Naming Conventions: What to name a boolean variable?

Personally more than anything I would change the logic, or look at the business rules to see if they dictate any potential naming.

Since, the actual condition that toggles the boolean is actually the act of being "last". I would say that switching the logic, and naming it "IsLastItem" or similar would be a more preferred method.

No suitable records were found verify your bundle identifier is correct

For me, what fixed it was to enter the required details in App Store Connect -> TestFlight -> Test Information.

Once I'd done that it seemed that Xcode realised there was a new app to allow uploading to and succeeded.

(Also check your caps in your Bundle ID though. )

String isNullOrEmpty in Java?

For new projects, I've started having every class I write extend the same base class where I can put all the utility methods that are annoyingly missing from Java like this one, the equivalent for collections (tired of writing list != null && ! list.isEmpty()), null-safe equals, etc. I still use Apache Commons for the implementation but this saves a small amount of typing and I haven't seen any negative effects.

Pass Javascript Variable to PHP POST

You can do this using Ajax. I have a function that I use for something like this:

function ajax(elementID,filename,str,post)
{
    var ajax;
    if (window.XMLHttpRequest)
    {
        ajax=new XMLHttpRequest();//IE7+, Firefox, Chrome, Opera, Safari
    }
    else if (ActiveXObject("Microsoft.XMLHTTP"))
    {
        ajax=new ActiveXObject("Microsoft.XMLHTTP");//IE6/5
    }
    else if (ActiveXObject("Msxml2.XMLHTTP"))
    {
        ajax=new ActiveXObject("Msxml2.XMLHTTP");//other
    }
    else
    {
        alert("Error: Your browser does not support AJAX.");
        return false;
    }
    ajax.onreadystatechange=function()
    {
        if (ajax.readyState==4&&ajax.status==200)
        {
            document.getElementById(elementID).innerHTML=ajax.responseText;
        }
    }
    if (post==false)
    {
        ajax.open("GET",filename+str,true);
        ajax.send(null);
    }
    else
    {
        ajax.open("POST",filename,true);
        ajax.setRequestHeader("Content-type","application/x-www-form-urlencoded");
        ajax.send(str);
    }
    return ajax;
}

The first parameter is the element you want to change. The second parameter is the name of the filename you're loading into the element you're changing. The third parameter is the GET or POST data you're using, so for example "total=10000&othernumber=999". The last parameter is true if you want use POST or false if you want to GET.

Comparing object properties in c#

I ended up doing this:

    public static string ToStringNullSafe(this object obj)
    {
        return obj != null ? obj.ToString() : String.Empty;
    }
    public static bool Compare<T>(T a, T b)
    {
        int count = a.GetType().GetProperties().Count();
        string aa, bb;
        for (int i = 0; i < count; i++)
        {
            aa = a.GetType().GetProperties()[i].GetValue(a, null).ToStringNullSafe();
            bb = b.GetType().GetProperties()[i].GetValue(b, null).ToStringNullSafe();
            if (aa != bb)
            {
                return false;
            }
        }
        return true;
    }

Usage:

    if (Compare<ObjectType>(a, b))

Update

If you want to ignore some properties by name: 

    public static string ToStringNullSafe(this object obj)
    {
        return obj != null ? obj.ToString() : String.Empty;
    }
    public static bool Compare<T>(T a, T b, params string[] ignore)
    {
        int count = a.GetType().GetProperties().Count();
        string aa, bb;
        for (int i = 0; i < count; i++)
        {
            aa = a.GetType().GetProperties()[i].GetValue(a, null).ToStringNullSafe();
            bb = b.GetType().GetProperties()[i].GetValue(b, null).ToStringNullSafe();
            if (aa != bb && ignore.Where(x => x == a.GetType().GetProperties()[i].Name).Count() == 0)
            {
                return false;
            }
        }
        return true;
    }

Usage:

    if (MyFunction.Compare<ObjType>(a, b, "Id","AnotherProp"))

new Image(), how to know if image 100% loaded or not?

Use the load event:

img = new Image();

img.onload = function(){
  // image  has been loaded
};

img.src = image_url;

Also have a look at:

Hibernate Criteria Restrictions AND / OR combination

think works 

Criteria criteria = getSession().createCriteria(clazz); 
Criterion rest1= Restrictions.and(Restrictions.eq(A, "X"), 
           Restrictions.in("B", Arrays.asList("X",Y)));
Criterion rest2= Restrictions.and(Restrictions.eq(A, "Y"), 
           Restrictions.eq(B, "Z"));
criteria.add(Restrictions.or(rest1, rest2));

SQL query, store result of SELECT in local variable

I came here with a similar question/problem, but I only needed a single value to be stored from the query, not an array/table of results as in the orig post. I was able to use the table method above for a single value, however I have stumbled upon an easier way to store a single value.

declare @myVal int; set @myVal = isnull((select a from table1), 0);

Make sure to default the value in the isnull statement to a valid type for your variable, in my example the value in table1 that we're storing is an int.

Setting initial values on load with Select2 with Ajax

Maybe this work for you!! This works for me...

initSelection: function (element, callback) {

            callback({ id: 1, text: 'Text' });
}

Check very well that code is correctly spelled, my issue was in the initSelection, I had initselection

Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privileges?

For those who still stumble upon this like I did, it's worth checking to make sure the attempted GRANT does not already exist:

SHOW GRANTS FOR username;

In my case, the error was not actually because there was a permission error, but because the GRANT already existed.

Get PHP class property by string

What you're asking about is called Variable Variables. All you need to do is store your string in a variable and access it like so:

$Class = 'MyCustomClass';
$Property = 'Name';
$List = array('Name');

$Object = new $Class();

// All of these will echo the same property
echo $Object->$Property;  // Evaluates to $Object->Name
echo $Object->{$List[0]}; // Use if your variable is in an array

Using HTML5/Canvas/JavaScript to take in-browser screenshots

Your web app can now take a 'native' screenshot of the client's entire desktop using getUserMedia():

Have a look at this example:

https://www.webrtc-experiment.com/Pluginfree-Screen-Sharing/

The client will have to be using chrome (for now) and will need to enable screen capture support under chrome://flags.

Hibernate HQL Query : How to set a Collection as a named parameter of a Query?

I'm not sure about HQL, but in JPA you just call the query's setParameter with the parameter and collection.

Query q = entityManager.createQuery("SELECT p FROM Peron p WHERE name IN (:names)");
q.setParameter("names", names);

where names is the collection of names you're searching for

Collection<String> names = new ArrayList<String();
names.add("Joe");
names.add("Jane");
names.add("Bob");

Shell script : How to cut part of a string

Use a regular expression to catch the id number and replace the whole line with the number. Something like this should do it (match everything up to "id=", then match any number of digits, then match the rest of the line):

sed -e 's/.*id=\([0-9]\+\).*/\1/g'

Do this for every line and you get the list of ids.

What is the most "pythonic" way to iterate over a list in chunks?

With Python 3.8 you can use the walrus operator and itertools.islice.

from itertools import islice

list_ = [i for i in range(10, 100)]

def chunker(it, size):
    iterator = iter(it)
    while chunk := list(islice(iterator, size)):
        print(chunk)

In [2]: chunker(list_, 10)                                                         
[10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
[20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
[30, 31, 32, 33, 34, 35, 36, 37, 38, 39]
[40, 41, 42, 43, 44, 45, 46, 47, 48, 49]
[50, 51, 52, 53, 54, 55, 56, 57, 58, 59]
[60, 61, 62, 63, 64, 65, 66, 67, 68, 69]
[70, 71, 72, 73, 74, 75, 76, 77, 78, 79]
[80, 81, 82, 83, 84, 85, 86, 87, 88, 89]
[90, 91, 92, 93, 94, 95, 96, 97, 98, 99]

How do I generate sourcemaps when using babel and webpack?

If optimizing for dev + production, you could try something like this in your config:

const dev = process.env.NODE_ENV !== 'production'

// in config

{
  devtool: dev ? 'eval-cheap-module-source-map' : 'source-map',
}

From the docs:

  • devtool: "eval-cheap-module-source-map" offers SourceMaps that only maps lines (no column mappings) and are much faster
  • devtool: "source-map" cannot cache SourceMaps for modules and need to regenerate complete SourceMap for the chunk. It’s something for production.

I am using webpack 2.1.0-beta.19

How do I check for a network connection?

Call this method to check the network Connection.

public static bool IsConnectedToInternet()
        {
            bool returnValue = false;
            try
            {

                int Desc;
                returnValue = Utility.InternetGetConnectedState(out Desc, 0);
            }
            catch
            {
                returnValue = false;
            }
            return returnValue;
        }

Put this below line of code.

[DllImport("wininet.dll")]
        public extern static bool InternetGetConnectedState(out int Description, int ReservedValue);

ERROR:'keytool' is not recognized as an internal or external command, operable program or batch file

I suffered alot trying to find a solution to it and finally I found the solution by first setting the jre path to system variables by navigating to::

control panel > System and Security > System > Advanced system settings

Under System variables click on new

Variable name: KEY_PATH
Variable value: C:\Program Files (x86)\Java\jre1.8.0_171\bin

Where Variable value should be the path to your JDK's bin folder.

Then open command prompt and Change directory to the same JDK's bin folder like this

C:\Program Files (x86)\Java\jre1.8.0_171\bin

then copy and paste the code below in cmd

keytool -list -v -keystore "C:\Users\user\.android\debug.keystore" -alias androiddebugkey -storepass android -keypass android

Add space between <li> elements

You can use the margin property:

li.menu-item {
   margin:0 0 10px 0;   
}

Demo: http://jsfiddle.net/UAXyd/

How to make a owl carousel with arrows instead of next previous

Complete tutorial here

Demo link

enter image description here

JavaScript

$('.owl-carousel').owlCarousel({
    margin: 10,
    nav: true,
    navText:["<div class='nav-btn prev-slide'></div>","<div class='nav-btn next-slide'></div>"],
    responsive: {
        0: {
            items: 1
        },
        600: {
            items: 3
        },
        1000: {
            items: 5
        }
    }
});

CSS Style for navigation

.owl-carousel .nav-btn{
  height: 47px;
  position: absolute;
  width: 26px;
  cursor: pointer;
  top: 100px !important;
}

.owl-carousel .owl-prev.disabled,
.owl-carousel .owl-next.disabled{
pointer-events: none;
opacity: 0.2;
}

.owl-carousel .prev-slide{
  background: url(nav-icon.png) no-repeat scroll 0 0;
  left: -33px;
}
.owl-carousel .next-slide{
  background: url(nav-icon.png) no-repeat scroll -24px 0px;
  right: -33px;
}
.owl-carousel .prev-slide:hover{
 background-position: 0px -53px;
}
.owl-carousel .next-slide:hover{
background-position: -24px -53px;
}

Insert 2 million rows into SQL Server quickly

I tried with this method and it significantly reduced my database insert execution time.

List<string> toinsert = new List<string>();
StringBuilder insertCmd = new StringBuilder("INSERT INTO tabblename (col1, col2, col3) VALUES ");

foreach (var row in rows)
{
      // the point here is to keep values quoted and avoid SQL injection
      var first = row.First.Replace("'", "''")
      var second = row.Second.Replace("'", "''")
      var third = row.Third.Replace("'", "''")

      toinsert.Add(string.Format("( '{0}', '{1}', '{2}' )", first, second, third));
}
if (toinsert.Count != 0)
{
      insertCmd.Append(string.Join(",", toinsert));
      insertCmd.Append(";");
}
using (MySqlCommand myCmd = new MySqlCommand(insertCmd.ToString(), SQLconnectionObject))
{
      myCmd.CommandType = CommandType.Text;
      myCmd.ExecuteNonQuery();
}

*Create SQL connection object and replace it where I have written SQLconnectionObject.

Why do table names in SQL Server start with "dbo"?

dbo is the default schema in SQL Server. You can create your own schemas to allow you to better manage your object namespace.

installing urllib in Python3.6

yu have to install the correct version for your computer 32 or 63 bits thats all

How to change maven logging level to display only warning and errors?

Unfortunately, even with maven 3 the only way to do that is to patch source code.

Here is short instruction how to do that.

Clone or fork Maven 3 repo: "git clone https://github.com/apache/maven-3.git"

Edit org.apache.maven.cli.MavenCli#logging, and change

cliRequest.request.setLoggingLevel( MavenExecutionRequest.LOGGING_LEVEL_INFO );

to

cliRequest.request.setLoggingLevel( MavenExecutionRequest.LOGGING_LEVEL_WARN );

In current snapshot version it's at line 270

Then just run "mvn install", your new maven distro will be located in "apache-maven\target\" folder

See this diff for the reference: https://github.com/ushkinaz/maven-3/commit/cc079aa75ca8c82658c7ff53f18c6caaa32d2131

Explanation on Integer.MAX_VALUE and Integer.MIN_VALUE to find min and max value in an array

By initializing the min/max values to their extreme opposite, you avoid any edge cases of values in the input: Either one of min/max is in fact one of those values (in the case where the input consists of only one of those values), or the correct min/max will be found.

It should be noted that primitive types must have a value. If you used Objects (ie Integer), you could initialize value to null and handle that special case for the first comparison, but that creates extra (needless) code. However, by using these values, the loop code doesn't need to worry about the edge case of the first comparison.

Another alternative is to set both initial values to the first value of the input array (never a problem - see below) and iterate from the 2nd element onward, since this is the only correct state of min/max after one iteration. You could iterate from the 1st element too - it would make no difference, other than doing one extra (needless) iteration over the first element.

The only sane way of dealing with inout of size zero is simple: throw an IllegalArgumentException, because min/max is undefined in this case.

The operation cannot be completed because the DbContext has been disposed error

The reason why it is throwing the error is the object is disposed and after that we are trying to access the table values through the object, but object is disposed.Better to convert that into ToList() so that we can have values

Maybe it isn't actually getting the data until you use it (it is lazy loading), so dataContext doesn't exist when you are trying to do the work. I bet if you did the ToList() in scope it would be ok.

try
{
    IQueryable<User> users;
    var ret = null;

    using (var dataContext = new dataContext())
    {
        users = dataContext.Users.Where(x => x.AccountID == accountId && x.IsAdmin == false);

        if(users.Any())
        {
            ret = users.Select(x => x.ToInfo()).ToList(); 
        }

     }

   Return ret;
}
catch (Exception ex)
{
    ...
}

Element count of an array in C++

Let's say I have an array arr. When would the following not give the number of elements of the array: sizeof(arr) / sizeof(arr[0])?

In contexts where arr is not actually the array (but instead a pointer to the initial element). Other answers explain how this happens.

I can thing of only one case: the array contains elements that are of different derived types of the type of the array.

This cannot happen (for, fundamentally, the same reason that Java arrays don't play nicely with generics). The array is statically typed; it reserves "slots" of memory that are sized for a specific type (the base type).

Sorry for the trivial question, I am a Java dev and I am rather new to C++.

C++ arrays are not first-class objects. You can use boost::array to make them behave more like Java arrays, but keep in mind that you will still have value semantics rather than reference semantics, just like with everything else. (In particular, this means that you cannot really declare a variable of type analogous to Foo[] in Java, nor replace an array with another one of a different size; the array size is a part of the type.) Use .size() with this class where you would use .length in Java. (It also supplies iterators that provide the usual interface for C++ iterators.)

Calculate difference between two dates (number of days)?

Use TimeSpan object which is the result of date substraction:

DateTime d1;
DateTime d2;
return (d1 - d2).TotalDays;

Requested bean is currently in creation: Is there an unresolvable circular reference?

@Resource annotation on field level also could be used to declare look up at runtime

Linux Script to check if process is running and act on the result

Programs to monitor if a process on a system is running.

Script is stored in crontab and runs once every minute.

This works with if process is not running or process is running multiple times:

#! /bin/bash

case "$(pidof amadeus.x86 | wc -w)" in

0)  echo "Restarting Amadeus:     $(date)" >> /var/log/amadeus.txt
    /etc/amadeus/amadeus.x86 &
    ;;
1)  # all ok
    ;;
*)  echo "Removed double Amadeus: $(date)" >> /var/log/amadeus.txt
    kill $(pidof amadeus.x86 | awk '{print $1}')
    ;;
esac

0 If process is not found, restart it.
1 If process is found, all ok.
* If process running 2 or more, kill the last.

A simpler version. This just test if process is running, and if not restart it.

It just tests the exit flag $? from the pidof program. It will be 0 of process is running and 1 if not.

#!/bin/bash
pidof  amadeus.x86 >/dev/null
if [[ $? -ne 0 ]] ; then
        echo "Restarting Amadeus:     $(date)" >> /var/log/amadeus.txt
        /etc/amadeus/amadeus.x86 &
fi

And at last, a one liner

pidof amadeus.x86 >/dev/null ; [[ $? -ne 0 ]] && echo "Restarting Amadeus:     $(date)" >> /var/log/amadeus.txt && /etc/amadeus/amadeus.x86 &

cccam oscam

CSS Image size, how to fill, but not stretch?

This will Fill images to a specific size, without stretching it or without cropping it

img{
    width:150px;  //your requirement size
    height:100px; //your requirement size

/*Scale down will take the necessary specified space that is 150px x 100px without stretching the image*/
    object-fit:scale-down;
}

mysql update column with value from another table

The second option is feasible also if you're using safe updates mode (and you're getting an error indicating that you've tried to update a table without a WHERE that uses a KEY column), by adding: 

UPDATE TableB  
SET TableB.value = (  
SELECT TableA.value  
    FROM TableA  
    WHERE TableA.name = TableB.name  
)  
**where TableB.id < X**  
;

Run Bash Command from PHP

Check if have not set a open_basedir in php.ini or .htaccess of domain what you use. That will jail you in directory of your domain and php will get only access to execute inside this directory.

MongoDB vs Firebase

I will answer this question in terms of AngularFire, Firebase's library for Angular.

  1. Tl;dr: superpowers. :-)

  2. AngularFire's three-way data binding. Angular binds the view and the $scope, i.e., what your users do in the view automagically updates in the local variables, and when your JavaScript updates a local variable the view automagically updates. With Firebase the cloud database also updates automagically. You don't need to write $http.get or $http.put requests, the data just updates.

  3. Five-way data binding, and seven-way, nine-way, etc. I made a tic-tac-toe game using AngularFire. Two players can play together, with the two views updating the two $scopes and the cloud database. You could make a game with three or more players, all sharing one Firebase database.

  4. AngularFire's OAuth2 library makes authorization easy with Facebook, GitHub, Google, Twitter, tokens, and passwords.

  5. Double security. You can set up your Angular routes to require authorization, and set up rules in Firebase about who can read and write data.

  6. There's no back end. You don't need to make a server with Node and Express. Running your own server can be a lot of work, require knowing about security, require that someone do something if the server goes down, etc.

  7. Fast. If your server is in San Francisco and the client is in San Jose, fine. But for a client in Bangalore connecting to your server will be slower. Firebase is deployed around the world for fast connections everywhere.

Angular Directive refresh on parameter change

I hope this will help reloading/refreshing directive on value from parent scope 

<html>

        <head>
            <!-- version 1.4.5 -->
            <script src="angular.js"></script>
        </head>

        <body ng-app="app" ng-controller="Ctrl">

            <my-test reload-on="update"></my-test><br>
            <button ng-click="update = update+1;">update {{update}}</button>
        </body>
        <script>
            var app = angular.module('app', [])
            app.controller('Ctrl', function($scope) {

                $scope.update = 0;
            });
            app.directive('myTest', function() {
                return {
                    restrict: 'AE',
                    scope: {
                        reloadOn: '='
                    },
                    controller: function($scope) {
                        $scope.$watch('reloadOn', function(newVal, oldVal) {
                            //  all directive code here
                            console.log("Reloaded successfully......" + $scope.reloadOn);
                        });
                    },
                    template: '<span>  {{reloadOn}} </span>'
                }
            });
        </script>


   </html>

Wait until an HTML5 video loads

call function on load:

<video onload="doWhatYouNeedTo()" src="demo.mp4" id="video">

get video duration

var video = document.getElementById("video");
var duration = video.duration;

Datatable date sorting dd/mm/yyyy issue

I tried this and worked for me.

https://github.com/sedovsek/DataTables-EU-date-Plug-In

I used the format mode .ToString("dd/MM/yyyy"); then in my jQuery.Datatable works fine.

jQ below

oTable = $('#grid').dataTable({
    "sPaginationType": "full_numbers",
    "aoColumns": [
        { "sType": "eu_date" },
        null
    ]
});
});

The column you have dates, you should define with the sType like the code above.

Arraylist swap elements

You can use Collections.swap(List<?> list, int i, int j);

command/usr/bin/codesign failed with exit code 1- code sign error

Just reset your development and distribution certificate and clean your project. After that , Reboot also worked for me. Interestingly it seems to be an issue with allowing Xcode access to the certificates. When i tried the archive again, i received 2 popups asking me if i wanted to allow Xcode to access my keychain. After this it worked fine.

Hover and Active only when not disabled

Why not using attribute "disabled" in css. This must works on all browsers.

button[disabled]:hover {
    background: red;
}
button:hover {
    background: lime;
}

How to get the current user's Active Directory details in C#

Alan already gave you the right answer - use the sAMAccountName to filter your user.

I would add a recommendation on your use of DirectorySearcher - if you only want one or two pieces of information, add them into the "PropertiesToLoad" collection of the DirectorySearcher.

Instead of retrieving the whole big user object and then picking out one or two items, this will just return exactly those bits you need.

Sample:

adSearch.PropertiesToLoad.Add("sn");  // surname = last name
adSearch.PropertiesToLoad.Add("givenName");  // given (or first) name
adSearch.PropertiesToLoad.Add("mail");  // e-mail addresse
adSearch.PropertiesToLoad.Add("telephoneNumber");  // phone number

Those are just the usual AD/LDAP property names you need to specify.

Copy a file in a sane, safe and efficient way

For those who like boost:

boost::filesystem::path mySourcePath("foo.bar");
boost::filesystem::path myTargetPath("bar.foo");

// Variant 1: Overwrite existing
boost::filesystem::copy_file(mySourcePath, myTargetPath, boost::filesystem::copy_option::overwrite_if_exists);

// Variant 2: Fail if exists
boost::filesystem::copy_file(mySourcePath, myTargetPath, boost::filesystem::copy_option::fail_if_exists);

Note that boost::filesystem::path is also available as wpath for Unicode. And that you could also use

using namespace boost::filesystem

if you do not like those long type names

How to convert a plain object into an ES6 Map?

Yes, the Map constructor takes an array of key-value pairs.

Object.entries is a new Object static method available in ES2017 (19.1.2.5).

const map = new Map(Object.entries({foo: 'bar'}));

map.get('foo'); // 'bar'

It's currently implemented in Firefox 46+ and Edge 14+ and newer versions of Chrome

If you need to support older environments and transpilation is not an option for you, use a polyfill, such as the one recommended by georg:

Object.entries = typeof Object.entries === 'function' ? Object.entries : obj => Object.keys(obj).map(k => [k, obj[k]]);

Batch / Find And Edit Lines in TXT file

This is the kind of stuff sed was made for (of course, you need sed on your system for that).

sed 's/ex3/ex5/g' input.txt > output.txt

You will either need a Unix system or a Windows Cygwin kind of platform for this.
There is also GnuWin32 for sed. (GnuWin32 installation and usage).

The CSRF token is invalid. Please try to resubmit the form

You need to add the _token in your form i.e

{{ form_row(form._token) }}

As of now your form is missing the CSRF token field. If you use the twig form functions to render your form like form(form) this will automatically render the CSRF token field for you, but your code shows you are rendering your form with raw HTML like <form></form>, so you have to manually render the field.

Or, simply add {{ form_rest(form) }} before the closing tag of the form.

According to docs

This renders all fields that have not yet been rendered for the given form. It's a good idea to always have this somewhere inside your form as it'll render hidden fields for you and make any fields you forgot to render more obvious (since it'll render the field for you).

form_rest(view, variables)

What does the arrow operator, '->', do in Java?

New Operator for lambda expression added in java 8

Lambda expression is the short way of method writing.
It is indirectly used to implement functional interface

Primary Syntax : (parameters) -> { statements; }

There are some basic rules for effective lambda expressions writting which you should konw.

SQL Statement using Where clause with multiple values

Try this:

select songName from t
where personName in ('Ryan', 'Holly')
group by songName
having count(distinct personName) = 2

The number in the having should match the amount of people. If you also need the Status to be Complete use this where clause instead of the previous one:

where personName in ('Ryan', 'Holly') and status = 'Complete'

PyLint "Unable to import" error - how to set PYTHONPATH?

1) sys.path is a list.

2) The problem is sometimes the sys.path is not your virtualenv.path and you want to use pylint in your virtualenv

3) So like said, use init-hook (pay attention in ' and " the parse of pylint is strict)

[Master]
init-hook='sys.path = ["/path/myapps/bin/", "/path/to/myapps/lib/python3.3/site-packages/", ... many paths here])'

or

[Master]
init-hook='sys.path = list(); sys.path.append("/path/to/foo")'

.. and 

pylint --rcfile /path/to/pylintrc /path/to/module.py

WebApi's {"message":"an error has occurred"} on IIS7, not in IIS Express

If you have <deployment retail="true"/> in your .NET Framework's machine.config, you won't see detailed error messages. Make sure that setting is false, or not present.

How to resolve conflicts in EGit

As it's an issue we face more than often, below are the steps to resolve it.

  1. Open the Git perspective. In the Git Repository view, go to on Branches ? Local ? master and right click ? Merge...

  2. It should auto select Remote Tracking ? *origin/master. Press Merge.

  3. Launch stage view in Eclipse.

  4. Double click the files which initially showed conflict

  5. In the conflict merge view, by selecting the left arrow for all the non-conflict + conflict changes from left to right, you can resolve all the conflicts.

  6. Save the merged file.

  7. Do a Team ? pull from Eclipse again.

You are all set :)

jQuery: get parent tr for selected radio button

Try this.

You don't need to prefix attribute name by @ in jQuery selector. Use closest() method to get the closest parent element matching the selector.

$("#MwDataList input[name=selectRadioGroup]:checked").closest('tr');

You can simplify your method like this

function getSelectedRowGuid() {
    return GetRowGuid(
      $("#MwDataList > input:radio[@name=selectRadioGroup]:checked :parent tr"));
}

closest() - Gets the first element that matches the selector, beginning at the current element and progressing up through the DOM tree.

As a side note, the ids of the elements should be unique on the page so try to avoid having same ids for radio buttons which I can see in your markup. If you are not going to use the ids then just remove it from the markup.

Ways to circumvent the same-origin policy

Well, I used curl in PHP to circumvent this. I have a webservice running in port 82.

<?php

$curl = curl_init();
$timeout = 30;
$ret = "";
$url="http://localhost:82/put_val?val=".$_GET["val"];
curl_setopt ($curl, CURLOPT_URL, $url);
curl_setopt ($curl, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt ($curl, CURLOPT_MAXREDIRS, 20);
curl_setopt ($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5");
curl_setopt ($curl, CURLOPT_CONNECTTIMEOUT, $timeout);
$text = curl_exec($curl);
echo $text;

?>

Here is the javascript that makes the call to the PHP file

function getdata(obj1, obj2) {

    var xmlhttp;

    if (window.XMLHttpRequest)
            xmlhttp=new XMLHttpRequest();
    else
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");

    xmlhttp.onreadystatechange=function()
    {
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
                document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
        }
    }
    xmlhttp.open("GET","phpURLFile.php?eqp="+obj1+"&val="+obj2,true);
    xmlhttp.send();
}

My HTML runs on WAMP in port 80. So there we go, same origin policy has been circumvented :-)

HTML form readonly SELECT tag/input

select multiple does not respond nearly as well to the above code suggestions. With MUCH sledgehammering and kludging, I ended up with this:

var thisId="";
var thisVal="";
function selectAll(){
    $("#"+thisId+" option").each(function(){
        if(!$(this).prop("disabled"))$(this).prop("selected",true);
    });
    $("#"+thisId).prop("disabled",false);
}
$(document).ready(function(){
    $("select option:not(:selected)").attr('disabled',true);
    $("select[multiple]").focus(function(){
        thisId=$(this).prop("id");
        thisVal=$(this).val();
        $(this).prop("disabled",true).blur();
        setTimeout("selectAll();",200);
    });
});

How to load image to WPF in runtime?

In WPF an image is typically loaded from a Stream or an Uri.

BitmapImage supports both and an Uri can even be passed as constructor argument:

var uri = new Uri("http://...");
var bitmap = new BitmapImage(uri);

If the image file is located in a local folder, you would have to use a file:// Uri. You could create such a Uri from a path like this:

var path = Path.Combine(Environment.CurrentDirectory, "Bilder", "sas.png");
var uri = new Uri(path);

If the image file is an assembly resource, the Uri must follow the the Pack Uri scheme:

var uri = new Uri("pack://application:,,,/Bilder/sas.png");

In this case the Visual Studio Build Action for sas.png would have to be Resource.

Once you have created a BitmapImage and also have an Image control like in this XAML

<Image Name="image1" />

you would simply assign the BitmapImage to the Source property of that Image control:

image1.Source = bitmap;

DateTime and CultureInfo

InvariantCulture is similar to en-US, so i would use the correct CultureInfo instead:

var dutchCulture = CultureInfo.CreateSpecificCulture("nl-NL");
var date1 = DateTime.ParseExact(date, "dd.MM.yyyy HH:mm:ss", dutchCulture);

Demo

And what about when the culture is en-us? Will I have to code for every single language there is out there?

If you want to know how to display the date in another culture like "en-us", you can use date1.ToString(CultureInfo.CreateSpecificCulture("en-US")).

calling Jquery function from javascript

jQuery functions are called just like JavaScript functions.

For example, to dynamically add the class "red" to the document element with the id "orderedlist" using the jQuery addClass function:

$("#orderedlist").addClass("red");

As opposed to a regular line of JavaScript calling a regular function:

var x = document.getElementById("orderedlist");

addClass() is a jQuery function, getElementById() is a JavaScript function.

The dollar sign function makes the jQuery addClass function available.

The only difference is the jQuery example is calling the addclass function of the jQuery object $("#orderedlist") and the regular example is calling a function of the document object.

In your code 

$(function() {
// code to execute when the DOM is ready
});

Is used to specify code to run when the DOM is ready.

It does not differentiate (as you may think) what is "jQuery code" from regular JavaScript code.

So, to answer your question, just call functions you defined as you normally would.

//create a function
function my_fun(){
  // call a jQuery function:
  $("#orderedlist").addClass("red");
}

//call the function you defined:
myfun();

How to extract the year from a Python datetime object?

It's in fact almost the same in Python.. :-)

import datetime
year = datetime.date.today().year

Of course, date doesn't have a time associated, so if you care about that too, you can do the same with a complete datetime object:

import datetime
year = datetime.datetime.today().year

(Obviously no different, but you can store datetime.datetime.today() in a variable before you grab the year, of course).

One key thing to note is that the time components can differ between 32-bit and 64-bit pythons in some python versions (2.5.x tree I think). So you will find things like hour/min/sec on some 64-bit platforms, while you get hour/minute/second on 32-bit.

How to capture the browser window close event?

I used Slaks answer but that wasn't working as is, since the onbeforeunload returnValue is parsed as a string and then displayed in the confirmations box of the browser. So the value true was displayed, like "true".

Just using return worked. Here is my code

var preventUnloadPrompt;
var messageBeforeUnload = "my message here - Are you sure you want to leave this page?";
//var redirectAfterPrompt = "http://www.google.co.in";
$('a').live('click', function() { preventUnloadPrompt = true; });
$('form').live('submit', function() { preventUnloadPrompt = true; });
$(window).bind("beforeunload", function(e) { 
    var rval;
    if(preventUnloadPrompt) {
        return;
    } else {
        //location.replace(redirectAfterPrompt);
        return messageBeforeUnload;
    }
    return rval;
})

Build .so file from .c file using gcc command line

To generate a shared library you need first to compile your C code with the -fPIC (position independent code) flag. 

gcc -c -fPIC hello.c -o hello.o

This will generate an object file (.o), now you take it and create the .so file:

gcc hello.o -shared -o libhello.so

EDIT: Suggestions from the comments:

You can use

gcc -shared -o libhello.so -fPIC hello.c

to do it in one step. – Jonathan Leffler

I also suggest to add -Wall to get all warnings, and -g to get debugging information, to your gcc commands. – Basile Starynkevitch

How to automatically update your docker containers, if base-images are updated

I had the same issue and thought it can be simply solved by a cron job calling unattended-upgrade daily.

My intention is to have this as an automatic and quick solution to ensure that production container is secure and updated because it can take me sometime to update my images and deploy a new docker image with the latest security updates.

It is also possible to automate the image build and deployment with Github hooks

I've created a basic docker image with that automatically checks and installs security updates daily (can run directly by docker run itech/docker-unattended-upgrade ).

I also came across another different approach to check if the container needs an update.

My complete implementation:

Dockerfile

FROM ubuntu:14.04   

RUN apt-get update \
&& apt-get install -y supervisor unattended-upgrades \
&& rm -rf /var/lib/apt/lists/*

COPY install /install
RUN chmod 755 install
RUN /install

COPY start /start
RUN chmod 755 /start

Helper scripts

install

#!/bin/bash
set -e

cat > /etc/supervisor/conf.d/cron.conf <<EOF
[program:cron]
priority=20
directory=/tmp
command=/usr/sbin/cron -f
user=root
autostart=true
autorestart=true
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log
EOF

rm -rf /var/lib/apt/lists/*

ENTRYPOINT ["/start"]

start

#!/bin/bash

set -e

echo "Adding crontab for unattended-upgrade ..."
echo "0 0 * * * root /usr/bin/unattended-upgrade" >> /etc/crontab

# can also use @daily syntax or use /etc/cron.daily

echo "Starting supervisord ..."
exec /usr/bin/supervisord -n -c /etc/supervisor/supervisord.conf

Edit

I developed a small tool docker-run that runs as docker container and can be used to update packages inside all or selected running containers, it can also be used to run any arbitrary commands.

Can be easily tested with the following command:

docker run --rm -v /var/run/docker.sock:/tmp/docker.sock itech/docker-run exec

which by default will execute date command in all running containers and display the results. If you pass update instead of exec it will execute apt-get update followed by apt-get upgrade -y in all running containers

Generating a PDF file from React Components

Only few steps. We can download or generate PDF from our HTML page or we can generate PDF of specific div from a HTML page.

Steps : HTML -> Image (PNG or JPEG) -> PDF

Please Follow the below steps,

Step 1 :-

npm install --save html-to-image
npm install jspdf --save

Step 2 :-

/* ES6 */
import * as htmlToImage from 'html-to-image';
import { toPng, toJpeg, toBlob, toPixelData, toSvg } from 'html-to-image';
 
/* ES5 */
var htmlToImage = require('html-to-image');

-------------------------
import { jsPDF } from "jspdf";

Step 3 :-

   ******  With out PDF properties given below  ******

 htmlToImage.toPng(document.getElementById('myPage'), { quality: 0.95 })
        .then(function (dataUrl) {
          var link = document.createElement('a');
          link.download = 'my-image-name.jpeg';
          const pdf = new jsPDF();          
          pdf.addImage(dataUrl, 'PNG', 0, 0);
          pdf.save("download.pdf"); 
        });


    ******  With PDF properties given below ******

    htmlToImage.toPng(document.getElementById('myPage'), { quality: 0.95 })
        .then(function (dataUrl) {
          var link = document.createElement('a');
          link.download = 'my-image-name.jpeg';
          const pdf = new jsPDF();
          const imgProps= pdf.getImageProperties(dataUrl);
          const pdfWidth = pdf.internal.pageSize.getWidth();
          const pdfHeight = (imgProps.height * pdfWidth) / imgProps.width;
          pdf.addImage(dataUrl, 'PNG', 0, 0,pdfWidth, pdfHeight);
          pdf.save("download.pdf"); 
        });

I think this is helpful. Please try

What is JavaScript garbage collection?

To the best of my knowledge, JavaScript's objects are garbage collected periodically when there are no references remaining to the object. It is something that happens automatically, but if you want to see more about how it works, at the C++ level, it makes sense to take a look at the WebKit or V8 source code

Typically you don't need to think about it, however, in older browsers, like IE 5.5 and early versions of IE 6, and perhaps current versions, closures would create circular references that when unchecked would end up eating up memory. In the particular case that I mean about closures, it was when you added a JavaScript reference to a dom object, and an object to a DOM object that referred back to the JavaScript object. Basically it could never be collected, and would eventually cause the OS to become unstable in test apps that looped to create crashes. In practice these leaks are usually small, but to keep your code clean you should delete the JavaScript reference to the DOM object.

Usually it is a good idea to use the delete keyword to immediately de-reference big objects like JSON data that you have received back and done whatever you need to do with it, especially in mobile web development. This causes the next sweep of the GC to remove that object and free its memory.

How to create the pom.xml for a Java project with Eclipse

You should use the new available m2e plugin for Maven integration in Eclipse. With help of that plugin, you should create a new project and move your sources into that project. These are the steps:

  • Check if m2e (or the former m2eclipse) are installed in your Eclipse distribution. If not, install it.
  • Open the "New Project Wizard": File > New > Project...
  • Open Maven and select Maven Project and click Next.
  • Select Create a simple project (to skip the archetype selection).
  • Add the necessary information: Group Id, Artifact Id, Packaging == jar, and a Name.
  • Finish the Wizard.
  • Your new Maven project is now generated, and you are able to move your sources and test packages to the relevant location in your workspace.
  • After that, you can build your project (inside Eclipse) by selecting your project, then calling from the context menu Run as > Maven install.

How do I find the index of a character within a string in C?

This should do it:

//Returns the index of the first occurence of char c in char* string. If not found -1 is returned.
int get_index(char* string, char c) {
    char *e = strchr(string, c);
    if (e == NULL) {
        return -1;
    }
    return (int)(e - string);
}

Sort array of objects by object fields

You can use sorted function from Nspl:

use function \nspl\a\sorted;
use function \nspl\op\propertyGetter;
use function \nspl\op\methodCaller;

// Sort by property value
$sortedByCount = sorted($objects, propertyGetter('count'));

// Or sort by result of method call
$sortedByName = sorted($objects, methodCaller('getName'));

List an Array of Strings in alphabetical order

You can use Arrays.sort() method. Here's the example,

import java.util.Arrays;

public class Test 
{
    public static void main(String[] args) 
    {
        String arrString[] = { "peter", "taylor", "brooke", "frederick", "cameron" };
        orderedGuests(arrString);
    }

    public static void orderedGuests(String[] hotel)
    {
        Arrays.sort(hotel);
        System.out.println(Arrays.toString(hotel));
    }
}

Output

[brooke, cameron, frederick, peter, taylor]

Get method arguments using Spring AOP?

If you have to log all args or your method have one argument, you can simply use getArgs like described in previous answers.

If you have to log a specific arg, you can annoted it and then recover its value like this : 

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface Data {
 String methodName() default "";
}

@Aspect
public class YourAspect {

 @Around("...")
 public Object around(ProceedingJoinPoint point) throws Throwable {
  Method method = MethodSignature.class.cast(point.getSignature()).getMethod();
  Object[] args = point.getArgs();
  StringBuilder data = new StringBuilder();
    Annotation[][] parameterAnnotations = method.getParameterAnnotations();
    for (int argIndex = 0; argIndex < args.length; argIndex++) {
        for (Annotation paramAnnotation : parameterAnnotations[argIndex]) {
            if (!(paramAnnotation instanceof Data)) {
                continue;
            }
            Data dataAnnotation = (Data) paramAnnotation;
            if (dataAnnotation.methodName().length() > 0) {
                Object obj = args[argIndex];
                Method dataMethod = obj.getClass().getMethod(dataAnnotation.methodName());
                data.append(dataMethod.invoke(obj));
                continue;
            }
            data.append(args[argIndex]);
        }
    }
 }
}

Examples of use : 

public void doSomething(String someValue, @Data String someData, String otherValue) {
    // Apsect will log value of someData param
}

public void doSomething(String someValue, @Data(methodName = "id") SomeObject someData, String otherValue) {
    // Apsect will log returned value of someData.id() method
}

Getting URL hash location, and using it in jQuery

location.hash is not safe for IE , in case of IE ( including IE9 ) , if your page contains iframe , then after manual refresh inside iframe content get location.hash value is old( value for first page load ). while manual retrieved value is different than location.hash so always retrieve it through document.URL

var hash = document.URL.substr(document.URL.indexOf('#')+1)

How can I read a large text file line by line using Java?

For reading a file with Java 8

package com.java.java8;

import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.stream.Stream;

/**
 * The Class ReadLargeFile.
 *
 * @author Ankit Sood Apr 20, 2017
 */
public class ReadLargeFile {

    /**
     * The main method.
     *
     * @param args
     *            the arguments
     */
    public static void main(String[] args) {
        try {
            Stream<String> stream = Files.lines(Paths.get("C:\\Users\\System\\Desktop\\demoData.txt"));
            stream.forEach(System.out::println);
        }
        catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

How to use private Github repo as npm dependency

With git there is a https format

https://github.com/equivalent/we_demand_serverless_ruby.git

This format accepts User + password

https://bot-user:[email protected]/equivalent/we_demand_serverless_ruby.git

So what you can do is create a new user that will be used just as a bot, add only enough permissions that he can just read the repository you want to load in NPM modules and just have that directly in your packages.json 

 Github > Click on Profile > Settings > Developer settings > Personal access tokens > Generate new token

In Select Scopes part, check the on repo: Full control of private repositories

This is so that token can access private repos that user can see

Now create new group in your organization, add this user to the group and add only repositories that you expect to be pulled this way (READ ONLY permission !)

You need to be sure to push this config only to private repo

Then you can add this to your / packages.json (bot-user is name of user, xxxxxxxxx is the generated personal token)

// packages.json


{
  // ....
    "name_of_my_lib": "https://bot-user:[email protected]/ghuser/name_of_my_lib.git"
  // ...
}

https://blog.eq8.eu/til/pull-git-private-repo-from-github-from-npm-modules-or-bundler.html

Is it possible to pass a flag to Gulp to have it run tasks in different ways?

Edit

gulp-util is deprecated and should be avoid, so it's recommended to use minimist instead, which gulp-util already used.

So I've changed some lines in my gulpfile to remove gulp-util:

var argv = require('minimist')(process.argv.slice(2));

gulp.task('styles', function() {
  return gulp.src(['src/styles/' + (argv.theme || 'main') + '.scss'])
    …
});

Original

In my project I use the following flag:

gulp styles --theme literature

Gulp offers an object gulp.env for that. It's deprecated in newer versions, so you must use gulp-util for that. The tasks looks like this:

var util = require('gulp-util');

gulp.task('styles', function() {
  return gulp.src(['src/styles/' + (util.env.theme ? util.env.theme : 'main') + '.scss'])
    .pipe(compass({
        config_file: './config.rb',
        sass   : 'src/styles',
        css    : 'dist/styles',
        style  : 'expanded'

    }))
    .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'ff 17', 'opera 12.1', 'ios 6', 'android 4'))
    .pipe(livereload(server))
    .pipe(gulp.dest('dist/styles'))
    .pipe(notify({ message: 'Styles task complete' }));
});

The environment setting is available during all subtasks. So I can use this flag on the watch task too:

gulp watch --theme literature

And my styles task also works.

Ciao Ralf

How to refresh the data in a jqGrid?

 
var newdata= //You call Ajax peticion//

$("#idGrid").clearGridData();

$("#idGrid").jqGrid('setGridParam', {data:newdata)});
$("#idGrid").trigger("reloadGrid");

in event update data table

How can I install a CPAN module into a local directory?

For Makefile.PL-based distributions, use the INSTALL_BASE option when generating Makefiles:

perl Makefile.PL INSTALL_BASE=/mydir/perl

Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM

A tool with a single solution for this I'm unaware of, but you can use Firebug and Web Developer extension at the same time.

Use Firebug to copy the html section you need (Inspect Element) and Web Developer to see which css is associated with an element (Calling Web Developer "View Style Information" - it works like Firebug's "Inspect Element", but instead of showing the html markup it shows the associated CSS with that markup).

It's not exactly what you want (one click for everything), but it's pretty close, and at least intuitive.

'View Style Information' result from Web Developer Extension

How do I dump the data of some SQLite3 tables?

According to the SQLite documentation for the Command Line Shell For SQLite you can export an SQLite table (or part of a table) as CSV, simply by setting the "mode" to "csv" and then run a query to extract the desired rows of the table:

sqlite> .header on
sqlite> .mode csv
sqlite> .once c:/work/dataout.csv
sqlite> SELECT * FROM tab1;
sqlite> .exit

Then use the ".import" command to import CSV (comma separated value) data into an SQLite table:

sqlite> .mode csv
sqlite> .import C:/work/dataout.csv tab1
sqlite> .exit

Please read the further documentation about the two cases to consider: (1) Table "tab1" does not previously exist and (2) table "tab1" does already exist.

Shortcut to comment out a block of code with sublime text

Ctrl-/ will insert // style commenting, for javascript, etc
Ctrl-/ will insert <!-- --> comments for HTML,
Ctrl-/ will insert # comments for Ruby,
..etc

But does not work perfectly on HTML <script> tags.

HTML <script> ..blah.. </script> tags:
Ctrl-/ twice (ie Ctrl-/Ctrl-/) will effectively comment out the line:

  • The first Ctrl-/ adds // to the beginning of the line,
    which comments out the script tag, but adds "//" text to your webpage.
  • The second Ctrl-/ then surrounds that in <!-- --> style comments, which accomplishes the task.

Ctrl--Shift-/ does not produce multi-line comments on HTML (or even single line comments), but does
add /* */ style multi-line comments in Javascript, text, and other file formats.

--

[I added as a new answer since I could not add comments.
I included this info because this is the info I was looking for, and this is the only related StackOverflow page from my search results.
I since discovered the / / trick for HTML script tags and decided to share this additional information, since it requires a slight variation of the usual catch-all (and reported above)
/ and Ctrl--Shift-/ method of commenting out one's code in sublime.]

Bold black cursor in Eclipse deletes code, and I don't know how to get rid of it

It sounds like you hit the "Insert" key .. in most applications this results in a fat (solid rectangle) cursor being displayed, as your screenshot suggests. This indicates that you are in overwrite mode rather than the default insert mode.

Just hit the "insert" key on your keyboard once more... it's usually near the 'delete' (not backspace), scroll lock and 'Print Screen' (often above the cursor keys in a full size keyboard.) This will switch back to insert mode and turn your cursor into a vertical line rather than a rectangle.

How do malloc() and free() work?

Well it depends on the memory allocator implementation and the OS.

Under windows for example a process can ask for a page or more of RAM. The OS then assigns those pages to the process. This is not, however, memory allocated to your application. The CRT memory allocator will mark the memory as a contiguous "available" block. The CRT memory allocator will then run through the list of free blocks and find the smallest possible block that it can use. It will then take as much of that block as it needs and add it to an "allocated" list. Attached to the head of the actual memory allocation will be a header. This header will contain various bit of information (it could, for example, contain the next and previous allocated blocks to form a linked list. It will most probably contain the size of the allocation).

Free will then remove the header and add it back to the free memory list. If it forms a larger block with the surrounding free blocks these will be added together to give a larger block. If a whole page is now free the allocator will, most likely, return the page to the OS.

It is not a simple problem. The OS allocator portion is completely out of your control. I recommend you read through something like Doug Lea's Malloc (DLMalloc) to get an understanding of how a fairly fast allocator will work.

Edit: Your crash will be caused by the fact that by writing larger than the allocation you have overwritten the next memory header. This way when it frees it gets very confused as to what exactly it is free'ing and how to merge into the following block. This may not always cause a crash straight away on the free. It may cause a crash later on. In general avoid memory overwrites!

Regex pattern for checking if a string starts with a certain substring?

The StartsWith method will be faster, as there is no overhead of interpreting a regular expression, but here is how you do it:

if (Regex.IsMatch(theString, "^(mailto|ftp|joe):")) ...

The ^ mathes the start of the string. You can put any protocols between the parentheses separated by | characters.

edit:

Another approach that is much faster, is to get the start of the string and use in a switch. The switch sets up a hash table with the strings, so it's faster than comparing all the strings:

int index = theString.IndexOf(':');
if (index != -1) {
  switch (theString.Substring(0, index)) {
    case "mailto":
    case "ftp":
    case "joe":
      // do something
      break;
  }
}

MySQL Results as comma separated list

Instead of using group concat() you can use just concat()

Select concat(Col1, ',', Col2) as Foo_Bar from Table1;

edit this only works in mySQL; Oracle concat only accepts two arguments. In oracle you can use something like select col1||','||col2||','||col3 as foobar from table1; in sql server you would use + instead of pipes.

"ImportError: no module named 'requests'" after installing with pip

Run in command prompt.

pip list

Check what version you have installed on your system if you have an old version.

Try to uninstall the package...

pip uninstall requests

Try after to install it:

pip install requests

You can also test if pip does not do the job.

easy_install requests

what is the difference between OLE DB and ODBC data sources?

According to ADO: ActiveX Data Objects, a book by Jason T. Roff, published by O'Reilly Media in 2001 (excellent diagram here), he says precisely what MOZILLA said.

(directly from page 7 of that book)

  • ODBC provides access only to relational databases
  • OLE DB provides the following features
    • Access to data regardless of its format or location
    • Full access to ODBC data sources and ODBC drivers

So it would seem that OLE DB interacts with SQL-based datasources THRU the ODBC driver layer.

alt text

I'm not 100% sure this image is correct. The two connections I'm not certain about are ADO.NET thru ADO C-api, and OLE DB thru ODBC to SQL-based data source (because in this diagram the author doesn't put OLE DB's access thru ODBC, which I believe is a mistake).

REST API error return good practices

Modeling your api on existing 'best practices' might be the way to go. For example, here is how Twitter handles error codes https://developer.twitter.com/en/docs/basics/response-codes

Making Python loggers output all messages to stdout in addition to log file

All logging output is handled by the handlers; just add a logging.StreamHandler() to the root logger.

Here's an example configuring a stream handler (using stdout instead of the default stderr) and adding it to the root logger:

import logging
import sys

root = logging.getLogger()
root.setLevel(logging.DEBUG)

handler = logging.StreamHandler(sys.stdout)
handler.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)
root.addHandler(handler)

Find something in column A then show the value of B for that row in Excel 2010

Guys Its very interesting to know that many of us face the problem of replication of lookup value while using the Vlookup/Index with Match or Hlookup.... If we have duplicate value in a cell we all know, Vlookup will pick up against the first item would be matching in loopkup array....So here is solution for you all...

e.g.

in Column A we have field called company....

Column A                             Column B            Column C

Company_Name                         Value        
Monster                              25000                              
Naukri                               30000  
WNS                                  80000  
American Express                     40000  
Bank of America                      50000  
Alcatel Lucent                       35000  
Google                               75000  
Microsoft                            60000  
Monster                              35000  
Bank of America                      15000

Now if you lookup the above dataset, you would see the duplicity is in Company Name at Row No# 10 & 11. So if you put the vlookup, the data will be picking up which comes first..But if you use the below formula, you can make your lookup value Unique and can pick any data easily without having any dispute or facing any problem

Put the formula in C2.........A2&"_"&COUNTIF(A2:$A$2,A2)..........Result will be Monster_1 for first line item and for row no 10 & 11.....Monster_2, Bank of America_2 respectively....Here you go now you have the unique value so now you can pick any data easily now..

Cheers!!! Anil Dhawan

Try-catch block in Jenkins pipeline script

You're using the declarative style of specifying your pipeline, so you must not use try/catch blocks (which are for Scripted Pipelines), but the post section. See: https://jenkins.io/doc/book/pipeline/syntax/#post-conditions

PLS-00103: Encountered the symbol "CREATE"

Run package declaration and body separately.

Source file 'Properties\AssemblyInfo.cs' could not be found

I got the error using TFS, my AssemblyInfo wasn't mapped in the branch I was working on.

Where in an Eclipse workspace is the list of projects stored?

You can also have several workspaces - so you can connect to one and have set "A" of projects - and then connect to a different set when ever you like.

Is it possible to specify the schema when connecting to postgres with JDBC?

If it is possible in your environment, you could also set the user's default schema to your desired schema:

ALTER USER user_name SET search_path to 'schema'

How to define servlet filter order of execution using annotations in WAR
  1. Make the servlet filter implement the spring Ordered interface.
  2. Declare the servlet filter bean manually in configuration class.
    import org.springframework.core.Ordered;
    
    public class MyFilter implements Filter, Ordered {

        @Override
        public void init(FilterConfig filterConfig) {
            // do something
        }

        @Override
        public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
            // do something
        }

        @Override
        public void destroy() {
            // do something
        }

        @Override
        public int getOrder() {
            return -100;
        }
    }


    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;

    @Configuration
    @ComponentScan
    public class MyAutoConfiguration {

        @Bean
        public MyFilter myFilter() {
            return new MyFilter();
        }
    }

How do I see the current encoding of a file in Sublime Text?

With the EncodingHelper plugin you can view the encoding of the file on the status bar. Also you can convert the encoding of the file and extended another functionalities.

Demo

php exec command (or similar) to not wait for result

This uses wget to notify a URL of something without waiting.

$command = 'wget -qO- http://test.com/data=data';
exec('nohup ' . $command . ' >> /dev/null 2>&1 & echo $!', $pid);

This uses ls to update a log without waiting.

$command = 'ls -la > content.log';
exec('nohup ' . $command . ' >> /dev/null 2>&1 & echo $!', $pid);

PHP - Extracting a property from an array of objects

 
function extract_ids($cats){
    $res = array();
    foreach($cats as $k=>$v) {
        $res[]= $v->id;
    }
    return $res
}

and use it in one line:

$ids = extract_ids($cats);

Get startup type of Windows service using PowerShell

If you update to PowerShell 5 you can query all of the services on the machine and display Name and StartType and sort it by StartType for easy viewing:

Get-Service |Select-Object -Property Name,StartType |Sort-Object -Property StartType

How to use source: function()... and AJAX in JQuery UI autocomplete

On the .ASPX page:

  <%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

  <html xmlns="http://www.w3.org/1999/xhtml">
  <head id="Head1" runat="server">
        <title>AutoComplete Box with jQuery</title>
        <link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script>  
        <script type="text/javascript">
            $(document).ready(function() {
                SearchText();
            });
            function SearchText() {
                $(".autosuggest").autocomplete({
                    source: function(request, response) {
                        $.ajax({
                            type: "POST",
                            contentType: "application/json; charset=utf-8",
                            url: "Default.aspx/GetAutoCompleteData",
                            data: "{'username':'" + document.getElementById('txtSearch').value + "'}",
                            dataType: "json",
                            success: function (data) {
                                if (data != null) {

                                    response(data.d);
                                }
                            },
                            error: function(result) {
                                alert("Error");
                            }
                        });
                    }
                });
            }
        </script>
  </head>
  <body>
      <form id="form1" runat="server">
          <div class="demo">
           <div class="ui-widget">
            <label for="tbAuto">Enter UserName: </label>
       <input type="text" id="txtSearch" class="autosuggest" />
    </div>
        </form>
    </body>
    </html>

In your .ASPX.CS code-behind file:

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Web.Services;
using System.Data;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    [WebMethod]
    public static List<string> GetAutoCompleteData(string username)
    {
        List<string> result = new List<string>();
            SqlConnection con = new SqlConnection("Data Source=YourDatasource;Initial Catalog=DatabseName;uid=sa;password=123");

            SqlCommand cmd = new SqlCommand("select DISTINCT Name from Address where Name LIKE '%'+@Name+'%'", con);
            con.Open();
                cmd.Parameters.AddWithValue("@Name", username);
                SqlDataReader dr = cmd.ExecuteReader();

                while (dr.Read())
                {
                    result.Add(dr["Name"].ToString());
                }
                return result;
        }
}

Find substring in the string in TWIG

Just searched for the docs, and found this:

Containment Operator: The in operator performs containment test. It returns true if the left operand is contained in the right:

{# returns true #}

{{ 1 in [1, 2, 3] }}

{{ 'cd' in 'abcde' }}

How to vertically align text in input type="text"?

I found this question while looking for a solution to my own problem. The previous answers rely on padding to make the text appear at the top or bottom of the input or use a combination of height and line-height to align the text to the vertical middle.

Here is an alternative solution to making the text appear in the middle using a div and positioning. Check out the jsfiddle.

<style type="text/css">
    div {
        display: inline-block;
        height: 300px;
        position: relative;
        width: 500px;
    }

    input {
        height: 100%;
        position: absolute;
        text-align: center; /* Optional */
        width: 100%;
    }
</style>

<div>
    <input type="text" value="Hello world!" />
</div>

How to create UILabel programmatically using Swift?

 
override func viewDidLoad()
{
  super.viewDidLoad()
  var label = UILabel(frame: CGRectMake(0, 0, 200, 21))
  label.center = CGPointMake(160, 284)
  label.textAlignment = NSTextAlignment.Center
  label.text = "I'm a test label"
  self.view.addSubview(label)
}

Swift 3.0+ Update:

let label = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 21))
label.center = CGPoint(x: 160, y: 285)
label.textAlignment = .center
label.text = "I'm a test label"
self.view.addSubview(label)

Put icon inside input element in a form

use this css class for your input at start, then customize accordingly:

_x000D_
_x000D_ 
    _x000D_
 .inp-icon{_x000D_
background: url(https://i.imgur.com/kSROoEB.png)no-repeat 100%;_x000D_
background-size: 16px;_x000D_
 }
_x000D_ 
<input class="inp-icon" type="text">
_x000D_
_x000D_
_x000D_

How to make a deep copy of Java ArrayList

Cloning the objects before adding them. For example, instead of newList.addAll(oldList);

for(Person p : oldList) {
    newList.add(p.clone());
}

Assuming clone is correctly overriden inPerson.

How do you hide the Address bar in Google Chrome for Chrome Apps?

In the latest version of Chrome (Version 50.0.2661.94 m) you can accomplish this by going to the menu and then clicking -> More Tools -> Add to Desktop. You will then want to check off "Open as Window" in the popup that appears and then click "Add". Screen shots below:

enter image description here

enter image description here

PHP Foreach Arrays and objects

Looping over arrays and objects is a pretty common task, and it's good that you're wanting to learn how to do it. Generally speaking you can do a foreach loop which cycles over each member, assigning it a new temporary name, and then lets you handle that particular member via that name:

foreach ($arr as $item) {
    echo $item->sm_id;
}

In this example each of our values in the $arr will be accessed in order as $item. So we can print our values directly off of that. We could also include the index if we wanted:

foreach ($arr as $index => $item) {
    echo "Item at index {$index} has sm_id value {$item->sm_id}";
}

What is the argument for printf that formats a long?

I think you mean:

unsigned long n;
printf("%lu", n);   // unsigned long

or

long n;
printf("%ld", n);   // signed long

Laravel $q->where() between dates

You can chain your wheres directly, without function(q). There's also a nice date handling package in laravel, called Carbon. So you could do something like:

$projects = Project::where('recur_at', '>', Carbon::now())
    ->where('recur_at', '<', Carbon::now()->addWeek())
    ->where('status', '<', 5)
    ->where('recur_cancelled', '=', 0)
    ->get();

Just make sure you require Carbon in composer and you're using Carbon namespace (use Carbon\Carbon;) and it should work.

EDIT: As Joel said, you could do:

$projects = Project::whereBetween('recur_at', array(Carbon::now(), Carbon::now()->addWeek()))
    ->where('status', '<', 5)
    ->where('recur_cancelled', '=', 0)
    ->get();

Reminder - \r\n or \n\r?

\r\n

Odd to say I remember it because it is the opposite of the typewriter I used.
Well if it was normal I had no need to remember it... :-)

typewriter from wikipedia *Image from Wikipedia

In the typewriter when you finish to digit the line you use the carriage return lever, that before makes roll the drum, the newline, and after allow you to manually operate the carriage return.

You can listen from this record from freesound.org the sound of the paper feeding in the beginning, and at around -1:03 seconds from the end, after the bell warning for the end of the line sound of the drum that rolls and after the one of the carriage return.

When to use "ON UPDATE CASCADE"

It's an excellent question, I had the same question yesterday. I thought about this problem, specifically SEARCHED if existed something like "ON UPDATE CASCADE" and fortunately the designers of SQL had also thought about that. I agree with Ted.strauss, and I also commented Noran's case.

When did I use it? Like Ted pointed out, when you are treating several databases at one time, and the modification in one of them, in one table, has any kind of reproduction in what Ted calls "satellite database", can't be kept with the very original ID, and for any reason you have to create a new one, in case you can't update the data on the old one (for example due to permissions, or in case you are searching for fastness in a case that is so ephemeral that doesn't deserve the absolute and utter respect for the total rules of normalization, simply because will be a very short-lived utility)

So, I agree in two points:

(A.) Yes, in many times a better design can avoid it; BUT

(B.) In cases of migrations, replicating databases, or solving emergencies, it's a GREAT TOOL that fortunately was there when I went to search if it existed.

Read a local text file using Javascript

Please find below the code that generates automatically the content of the txt local file and display it html. Good luck!

<html>
<head>
  <meta charset="utf-8">
  <script type="text/javascript">

  var x;
  if(navigator.appName.search('Microsoft')>-1) { x = new ActiveXObject('MSXML2.XMLHTTP'); }
  else { x = new XMLHttpRequest(); }

  function getdata() {
    x.open('get', 'data1.txt', true); 
    x.onreadystatechange= showdata;
    x.send(null);
  }

  function showdata() {
    if(x.readyState==4) {
      var el = document.getElementById('content');
      el.innerHTML = x.responseText;
    }
  }

  </script>
</head>
<body onload="getdata();showdata();">

  <div id="content"></div>

</body>
</html>

What do *args and **kwargs mean?

Putting *args and/or **kwargs as the last items in your function definition’s argument list allows that function to accept an arbitrary number of arguments and/or keyword arguments.

For example, if you wanted to write a function that returned the sum of all its arguments, no matter how many you supply, you could write it like this:

def my_sum(*args):
    return sum(args)

It’s probably more commonly used in object-oriented programming, when you’re overriding a function, and want to call the original function with whatever arguments the user passes in.

You don’t actually have to call them args and kwargs, that’s just a convention. It’s the * and ** that do the magic.

The official Python documentation has a more in-depth look.

Import error: No module name urllib2

Python 3:

import urllib.request

wp = urllib.request.urlopen("http://google.com")
pw = wp.read()
print(pw)

Python 2:

import urllib
import sys

wp = urllib.urlopen("http://google.com")
for line in wp:
    sys.stdout.write(line)

While I have tested both the Codes in respective versions.

Run CRON job everyday at specific time

Cron utility is an effective way to schedule a routine background job at a specific time and/or day on an on-going basis.

Linux Crontab Format

MIN HOUR DOM MON DOW CMD

enter image description here

Example::Scheduling a Job For a Specific Time

The basic usage of cron is to execute a job in a specific time as shown below. This will execute the Full backup shell script (full-backup) on 10th June 08:30 AM.

Please note that the time field uses 24 hours format. So, for 8 AM use 8, and for 8 PM use 20.

30 08 10 06 * /home/yourname/full-backup
  • 30 – 30th Minute
  • 08 – 08 AM
  • 10 – 10th Day
  • 06 – 6th Month (June)
  • *– Every day of the week

In your case, for 2.30PM,

30 14 * * * YOURCMD
  1. 30 – 30th Minute
  2. 14 – 2PM
  3. *– Every day
  4. *– Every month
  5. *– Every day of the week

To know more about cron, visit this website.

How to edit the size of the submit button on a form?

Just add style="width:auto"

<input type="submit" id="search" value="Search" style="width:auto" />

This worked for me in IE, Firefox and Chrome.

Grant SELECT on multiple tables oracle

This worked for me on my Oracle database:

SELECT   'GRANT SELECT, insert, update, delete ON mySchema.' || TABLE_NAME || ' to myUser;'
FROM     user_tables
where table_name like 'myTblPrefix%'

Then, copy the results, paste them into your editor, then run them like a script.

You could also write a script and use "Execute Immediate" to run the generated SQL if you don't want the extra copy/paste steps.

Drop all duplicate rows across multiple columns in Python Pandas

use groupby and filter

import pandas as pd
df = pd.DataFrame({"A":["foo", "foo", "foo", "bar"], "B":[0,1,1,1], "C":["A","A","B","A"]})
df.groupby(["A", "C"]).filter(lambda df:df.shape[0] == 1)

What is the point of "final class" in Java?

Final classes cannot be extended. So if you want a class to behave a certain way and don't someone to override the methods (with possibly less efficient and more malicious code), you can declare the whole class as final or specific methods which you don't want to be changed.

Since declaring a class does not prevent a class from being instantiated, it does not mean it will stop the class from having the characteristics of an object. It's just that you will have to stick to the methods just the way they are declared in the class.

Example of waitpid() in use?

Syntax of waitpid():

pid_t waitpid(pid_t pid, int *status, int options);

The value of pid can be:

  • < -1: Wait for any child process whose process group ID is equal to the absolute value of pid.
  • -1: Wait for any child process.
  • 0: Wait for any child process whose process group ID is equal to that of the calling process.
  • > 0: Wait for the child whose process ID is equal to the value of pid.

The value of options is an OR of zero or more of the following constants:

  • WNOHANG: Return immediately if no child has exited.
  • WUNTRACED: Also return if a child has stopped. Status for traced children which have stopped is provided even if this option is not specified.
  • WCONTINUED: Also return if a stopped child has been resumed by delivery of SIGCONT.

For more help, use man waitpid.

Convert php array to Javascript

Keep it simple :

var jsObject = JSON.parse('<?= addslashes(json_encode($phpArray)) ?>');

Can pandas automatically recognize dates?

Yes - according to the pandas.read_csv documentation:

Note: A fast-path exists for iso8601-formatted dates.

So if your csv has a column named datetime and the dates looks like 2013-01-01T01:01 for example, running this will make pandas (I'm on v0.19.2) pick up the date and time automatically:

df = pd.read_csv('test.csv', parse_dates=['datetime'])

Note that you need to explicitly pass parse_dates, it doesn't work without.

Verify with:

df.dtypes

You should see the datatype of the column is datetime64[ns]

Difference between & and && in Java?

&& == logical AND

& = bitwise AND

HTML form with two submit buttons and two "target" attributes

Here's a quick example script that displays a form that changes the target type:

<script type="text/javascript">
    function myTarget(form) {
        for (i = 0; i < form.target_type.length; i++) {
            if (form.target_type[i].checked)
                val = form.target_type[i].value;
        }
        form.target = val;
        return true;
    }
</script>
<form action="" onSubmit="return myTarget(this);">
    <input type="radio" name="target_type" value="_self" checked /> Self <br/>
    <input type="radio" name="target_type" value="_blank" /> Blank <br/>
    <input type="submit">
</form>

Copying from one text file to another using Python

Safe and memory-saving:

with open("out1.txt", "w") as fw, open("in.txt","r") as fr: 
    fw.writelines(l for l in fr if "tests/file/myword" in l)

It doesn't create temporary lists (what readline and [] would do, which is a non-starter if the file is huge), all is done with generator comprehensions, and using with blocks ensure that the files are closed on exit.

How to fit a smooth curve to my data in R?

I didn't see this method shown, so if someone else is looking to do this I found that ggplot documentation suggested a technique for using the gam method that produced similar results to loess when working with small data sets. 

library(ggplot2)
x <- 1:10
y <- c(2,4,6,8,7,8,14,16,18,20)

df <- data.frame(x,y)
r <- ggplot(df, aes(x = x, y = y)) + geom_smooth(method = "gam", formula = y ~ s(x, bs = "cs"))+geom_point()
r

First with the loess method and auto formula Second with the gam method with suggested formula

Filter an array using a formula (without VBA)

Sounds like you're just trying to do a classic two-column lookup. http://www.dailydoseofexcel.com/archives/2009/04/21/vlookup-on-two-columns/

Tons of solutions for this, most simple is probably the following (which doesn't require an array formula):

=SUMPRODUCT((Lookup!A:A=Param!A1)*(Lookup!B:B=Param!B1)*(Lookup!C:C))

To translate your specific example, you would use:

=SUMPRODUCT((A1:A3=A2)*(B1:B3="B")*(C1:C3))

Simple logical operators in Bash

very close

if [[ $varA -eq 1 ]] && [[ $varB == 't1' || $varC == 't2' ]]; 
  then 
    scale=0.05
  fi

should work.

breaking it down 

[[ $varA -eq 1 ]]

is an integer comparison where as 

$varB == 't1'

is a string comparison. otherwise, I am just grouping the comparisons correctly.

Double square brackets delimit a Conditional Expression. And, I find the following to be a good reading on the subject: "(IBM) Demystify test, [, [[, ((, and if-then-else"

What is the official name for a credit card's 3 digit code?

From Wikipedia,

The Card Security Code is located on the back of MasterCard, Visa and Discover credit or debit cards and is typically a separate group of 3 digits to the right of the signature strip. On American Express cards, the Card Security Code is a printed (NOT embossed) group of four digits on the front towards the right.

The Card Security Code (CSC), sometimes called Card Verification Value (CVV or CV2), Card Verification Value Code (CVVC), Card Verification Code (CVC), Verification Code (V-Code or V Code), or Card Code Verification (CCV)[1] is a security feature for credit or debit card transactions, giving increased protection against credit card fraud.

There are actually several types of security codes:

* The first code, called CVC1 or CVV1, is encoded on the magnetic stripe of the card and used for transactions in person.
* The second code, and the most cited, is CVV2 or CVC2. This CSC (also known as a CCID or Credit Card ID) is often asked for by merchants for them to secure "card not present" transactions occurring over the Internet, by mail, fax or over the phone. In many countries in Western Europe, due to increased attempts at card fraud, it is now mandatory to provide this code when the cardholder is not present in person.
* Contactless Card and Chip cards may supply their own codes generated electronically, such as iCVV or Dynamic CVV.

The CVC should not be confused with the standard card account number appearing in embossed or printed digits. (The standard card number undergoes a separate validation algorithm called the Luhn algorithm which serves to determine whether a given card's number is appropriate.)

The CVC should not be confused with PIN codes such as MasterCard SecureCode or Visa Verified by Visa. These codes are not printed or embedded in the card but are entered at the time of transaction using a keypad.

Fastest way to check a string contain another substring in JavaScript?

I made a jsben.ch for you http://jsben.ch/#/aWxtF ...seems that indexOf is a bit faster.

Is there a goto statement in Java?

As was pointed out, there is no goto in Java, but the keyword was reserved in case Sun felt like adding goto to Java one day. They wanted to be able to add it without breaking too much code, so they reserved the keyword. Note that with Java 5 they added the enum keyword and it did not break that much code either.

Although Java has no goto, it has some constructs which correspond to some usages of goto, namely being able to break and continue with named loops. Also, finally can be thought of as a kind of twisted goto.

How do I build a graphical user interface in C++?

Given the comment of "say Windows XP as an example", then your options are:

  • Interact directly with the operating system via its API, which for Microsoft Windows is surprise surprise call Windows API. The definitive reference for the WinAPI is Microsoft's MSDN website. A popular online beginner tutorial for that is theForger's Win32 API Programming Tutorial. The classic book for that is Charles Petzold's Programming Windows, 5th Edition.

  • Use a platform (both in terms of OS and compiler) specific library such as MFC, which wraps the WinAPI into C++ class. The reference for that is again MSDN. A classic book for that is Jeff Prosise's Programming Windows with MFC, 2nd Edition. If you are using say CodeGear C++ Builder, then the option here is VCL.

  • Use a cross platform library such as GTK+ (C++ wrapper: gtkmm), Qt, wxWidgets, or FLTK that wrap the specific OS's API. The advantages with these are that in general, your program could been compiled for different OS without having to change the source codes. As have already been mentioned, they each have its own strengths and weaknesses. One consideration when selecting which one to use is its license. For the examples given, GTK+ & gtkmm is license under LGPL, Qt is under various licenses including proprietary option, wxWidgets is under its own wxWindows Licence (with a rename to wxWidgets Licence), and FLTK is under LGPL with exception. For reference, tutorial, and or books, refer to each one's website for details.

Find column whose name contains a specific string

Getting name and subsetting based on Start, Contains, and Ends:

# from: https://stackoverflow.com/questions/21285380/find-column-whose-name-contains-a-specific-string
# from: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.str.contains.html
# from: https://cmdlinetips.com/2019/04/how-to-select-columns-using-prefix-suffix-of-column-names-in-pandas/
# from: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.filter.html




import pandas as pd



data = {'spike_starts': [1,2,3], 'ends_spike_starts': [4,5,6], 'ends_spike': [7,8,9], 'not': [10,11,12]}
df = pd.DataFrame(data)



print("\n")
print("----------------------------------------")
colNames_contains = df.columns[df.columns.str.contains(pat = 'spike')].tolist() 
print("Contains")
print(colNames_contains)



print("\n")
print("----------------------------------------")
colNames_starts = df.columns[df.columns.str.contains(pat = '^spike')].tolist() 
print("Starts")
print(colNames_starts)



print("\n")
print("----------------------------------------")
colNames_ends = df.columns[df.columns.str.contains(pat = 'spike$')].tolist() 
print("Ends")
print(colNames_ends)



print("\n")
print("----------------------------------------")
df_subset_start = df.filter(regex='^spike',axis=1)
print("Starts")
print(df_subset_start)



print("\n")
print("----------------------------------------")
df_subset_contains = df.filter(regex='spike',axis=1)
print("Contains")
print(df_subset_contains)



print("\n")
print("----------------------------------------")
df_subset_ends = df.filter(regex='spike$',axis=1)
print("Ends")
print(df_subset_ends)

How to create a notification with NotificationCompat.Builder?

The NotificationCompat.Builder is the most easy way to create Notifications on all Android versions. You can even use features that are available with Android 4.1. If your app runs on devices with Android >=4.1 the new features will be used, if run on Android <4.1 the notification will be an simple old notification.

To create a simple Notification just do (see Android API Guide on Notifications):

NotificationCompat.Builder mBuilder =
    new NotificationCompat.Builder(this)
    .setSmallIcon(R.drawable.notification_icon)
    .setContentTitle("My notification")
    .setContentText("Hello World!")
    .setContentIntent(pendingIntent); //Required on Gingerbread and below

You have to set at least smallIcon, contentTitle and contentText. If you miss one the Notification will not show.

Beware: On Gingerbread and below you have to set the content intent, otherwise a IllegalArgumentException will be thrown.

To create an intent that does nothing, use:

final Intent emptyIntent = new Intent();
PendingIntent pendingIntent = PendingIntent.getActivity(ctx, NOT_USED, emptyIntent, PendingIntent.FLAG_UPDATE_CURRENT);

You can add sound through the builder, i.e. a sound from the RingtoneManager:

mBuilder.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))

The Notification is added to the bar through the NotificationManager:

NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(mId, mBuilder.build());

How to run jenkins as a different user

ISSUE 1:

Started by user anonymous

That does not mean that Jenkins started as an anonymous user.

It just means that the person who started the build was not logged in. If you enable Jenkins security, you can create usernames for people and when they log in, the 

"Started by anonymous"

will change to 

"Started by < username >".

Note: You do not have to enable security in order to run jenkins or to clone correctly.

If you want to enable security and create users, you should see the options at Manage Jenkins > Configure System.

ISSUE 2:

The "can't clone" error is a different issue altogether. It has nothing to do with you logging in to jenkins or enabling security. It just means that Jenkins does not have the credentials to clone from your git SCM.

Check out the Jenkins Git Plugin to see how to set up Jenkins to work with your git repository.

Hope that helps.

Multiple IF statements between number ranges

It's a little tricky because of the nested IFs but here is my answer (confirmed in Google Spreadsheets):

=IF(AND(A2>=0,    A2<500),  "Less than 500", 
 IF(AND(A2>=500,  A2<1000), "Between 500 and 1000", 
 IF(AND(A2>=1000, A2<1500), "Between 1000 and 1500", 
 IF(AND(A2>=1500, A2<2000), "Between 1500 and 2000", "Undefined"))))

Reset identity seed after deleting records in SQL Server

Reset identity column with new id...

DECLARE @MAX INT
SELECT @MAX=ISNULL(MAX(Id),0) FROM [TestTable]

DBCC CHECKIDENT ('[TestTable]', RESEED,@MAX)

How to download a file from a website in C#

With the WebClient class:

using System.Net;
//...
WebClient Client = new WebClient ();
Client.DownloadFile("http://i.stackoverflow.com/Content/Img/stackoverflow-logo-250.png", @"C:\folder\stackoverflowlogo.png");

how to assign a block of html code to a javascript variable

you can make a javascript object with key being name of the html snippet, and value being an array of html strings, that are joined together. 

var html = {
  top_crimes_template:
    [
      '<div class="top_crimes"><h3>Top Crimes</h3></div>',
      '<table class="crimes-table table table-responsive table-bordered">',
        '<tr>',
          '<th>',
            '<span class="list-heading">Crime:</span>',
          '</th>',
          '<th>',
            '<span id="last_crime_span"># Arrests</span>',
          '</th>',
        '</tr>',
      '</table>'
    ].join(""),
  top_teams_template:
    [
      '<div class="top_teams"><h3>Top Teams</h3></div>',
      '<table class="teams-table table table-responsive table-bordered">',
        '<tr>',
          '<th>',
            '<span class="list-heading">Team:</span>',
          '</th>',
          '<th>',
            '<span id="last_team_span"># Arrests</span>',
          '</th>',
        '</tr>',
      '</table>'
    ].join(""),
  top_players_template:
    [
      '<div class="top_players"><h3>Top Players</h3></div>',
      '<table class="players-table table table-responsive table-bordered">',
        '<tr>',
          '<th>',
            '<span class="list-heading">Players:</span>',
          '</th>',
          '<th>',
            '<span id="last_player_span"># Arrests</span>',
          '</th>',
        '</tr>',
      '</table>'
    ].join("")
};

Difference between Relative path and absolute path in javascript

Going Relative:

  • You could download a self-contained directory (maybe a zipped file) and open links from an html or xml locally without need to reach the server. This increases speed performance significantly, specially if you have to deal with a slow network.

Going Absolute:

  • You would have to swallow the network speed, but in terms of security you could prevent certain users to see certain files or increase network traffic if (and only if...) that is good for you.

Get item in the list in Scala?

Please use parenthesis () to access the list elements list_name(index)

Caesar Cipher Function in Python

As @I82much said, you need to take cipherText = "" outside of your for loop. Place it at the beginning of the function. Also, your program has a bug which will cause it to generate encryption errors when you get capital letters as input. Try:

    if ch.isalpha(): 
        finalLetter = chr((ord(ch.lower()) - 97 + shift) % 26 + 97)

Submit HTML form on self page

You can do it using the same page on the action attribute: action='<yourpage>'

Get values from an object in JavaScript

To access the properties of an object without knowing the names of those properties you can use a for ... in loop:

for(key in data) {
    if(data.hasOwnProperty(key)) {
        var value = data[key];
        //do something with value;
    }
}

How to filter multiple values (OR operation) in angularJS

I would just create a custom filter. They are not that hard.

angular.module('myFilters', []).
  filter('bygenre', function() {
    return function(movies,genres) {
      var out = [];
      // Filter logic here, adding matches to the out var.
      return out;
    }
  });

template:

<h1>Movies</h1>

<div ng-init="movies = [
          {title:'Man on the Moon', genre:'action'},
          {title:'Meet the Robinsons', genre:'family'},
          {title:'Sphere', genre:'action'}
       ];" />
<input type="checkbox" ng-model="genrefilters.action" />Action
<br />
<input type="checkbox" ng-model="genrefilters.family" />Family
<br />{{genrefilters.action}}::{{genrefilters.family}}
<ul>
    <li ng-repeat="movie in movies | bygenre:genrefilters">{{movie.title}}: {{movie.genre}}</li>
</ul>

Edit here is the link: Creating Angular Filters

UPDATE: Here is a fiddle that has an exact demo of my suggestion.

How to get First and Last record from a sql query?

In all the exposed ways of do until now, must go through scan two times, one for the first row and one for the last row.

Using the Window Function "ROW_NUMBER() OVER (...)" plus "WITH Queries", you can scan only one time and get both items.

Window Function: https://www.postgresql.org/docs/9.6/static/functions-window.html

WITH Queries: https://www.postgresql.org/docs/9.6/static/queries-with.html

Example:

WITH scan_plan AS (
SELECT
    <some columns>,
    ROW_NUMBER() OVER (ORDER BY date DESC) AS first_row, /*It's logical required to be the same as major query*/
    ROW_NUMBER() OVER (ORDER BY date ASC) AS last_row /*It's rigth, needs to be the inverse*/
FROM mytable
<maybe some joins here>
WHERE <various conditions>
ORDER BY date DESC)

SELECT
    <some columns>
FROM scan_plan
WHERE scan_plan.first_row = 1 OR scan_plan.last_row = 1;

On that way you will do relations, filtrations and data manipulation only one time.

Try some EXPLAIN ANALYZE on both ways.

UML diagram shapes missing on Visio 2013

I think because it's Standard's ver.

I don't know if you write your code in VS. But if you did, just go to ARCHITECTURE - new Diagram. & choose yours, & the VS 'll take the care of the rest :)

jQuery selector for inputs with square brackets in the name attribute

Just separate it with different quotes:

<input name="myName[1][data]" value="myValue">

JQuery:

var value = $('input[name="myName[1][data]"]').val();

Automatically start forever (node) on system restart

Forever was not made to get node applications running as services. The right approach is to either create an /etc/inittab entry (old linux systems) or an upstart (newer linux systems).

Here's some documentation on how to set this up as an upstart: https://github.com/cvee/node-upstart

how to insert value into DataGridView Cell?

For Some Reason I could Not add Numbers(in string Format) to the DataGridView But This Worked For Me Hope it help someone!

//dataGridView1.Rows[RowCount].Cells[0].Value = FEString3;//This was not adding Stringed Numbers like "1","2","3"....
DataGridViewCell NewCell = new DataGridViewTextBoxCell();//Create New Cell
NewCell.Value = FEString3;//Set Cell Value
DataGridViewRow NewRow = new DataGridViewRow();//Create New Row
NewRow.Cells.Add(NewCell);//Add Cell to Row
dataGridView1.Rows.Add(NewRow);//Add Row To Datagrid

How to trigger an event in input text after I stop typing/writing?

You can use underscore.js "debounce"

$('input#username').keypress( _.debounce( function(){<your ajax call here>}, 500 ) );

This means that your function call will execute after 500ms of pressing a key. But if you press another key (another keypress event is fired) before the 500ms, the previous function execution will be ignored (debounced) and the new one will execute after a fresh 500ms timer.

For extra info, using _.debounce(func,timer,true) would mean that the first function will execute and all other keypress events withing subsequent 500ms timers would be ignored.

How do I detect a click outside an element?

Now there is a plugin for that: outside events (blog post)

The following happens when a clickoutside handler (WLOG) is bound to an element:

  • the element is added to an array which holds all elements with clickoutside handlers
  • a (namespaced) click handler is bound to the document (if not already there)
  • on any click in the document, the clickoutside event is triggered for those elements in that array that are not equal to or a parent of the click-events target
  • additionally, the event.target for the clickoutside event is set to the element the user clicked on (so you even know what the user clicked, not just that he clicked outside)

So no events are stopped from propagation and additional click handlers may be used "above" the element with the outside-handler.

What represents a double in sql server?

You should map it to FLOAT(53)- that's what LINQ to SQL does.

Why does cURL return error "(23) Failed writing body"?

In my case, I was doing: curl <blabla> | jq | grep <blibli>

With jq . it worked: curl <blabla> | jq . | grep <blibli>

TypeError: unhashable type: 'dict', when dict used as a key for another dict

From the error, I infer that referenceElement is a dictionary (see repro below). A dictionary cannot be hashed and therefore cannot be used as a key to another dictionary (or itself for that matter!).

>>> d1, d2 = {}, {}
>>> d1[d2] = 1
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: unhashable type: 'dict'

You probably meant either for element in referenceElement.keys() or for element in json['referenceElement'].keys(). With more context on what types json and referenceElement are and what they contain, we will be able to better help you if neither solution works.

Bootstrap 3: how to make head of dropdown link clickable in navbar

Here is my solution which uses JQuery in your header, and works on Mobile.

On mobile the top links require two taps: one to dropdown the menu and one to go to its link.

_x000D_
_x000D_ 
$(function(){_x000D_
  $('.dropdown-toggle').click(_x000D_
    function(){_x000D_
      if ($(this).next().is(':visible')) {_x000D_
        location.href = $(this).attr('href');;_x000D_
      }_x000D_
     });_x000D_
  });_x000D_
});
_x000D_
_x000D_
_x000D_

Enable IIS7 gzip

Another easy way to test without installing anything, neither is it dependent on IIS version. Paste your url to this link - SEO Checkup

test gzip

To add to web.config: http://www.iis.net/configreference/system.webserver/httpcompression

Can I calculate z-score with R?

if x is a vector with raw scores then scale(x) is a vector with standardized scores.

Or manually: (x-mean(x))/sd(x)

How to set 00:00:00 using moment.js

Moment.js stores dates it utc and can apply different timezones to it. By default it applies your local timezone. If you want to set time on utc date time you need to specify utc timezone.

Try the following code:

var m = moment().utcOffset(0);
m.set({hour:0,minute:0,second:0,millisecond:0})
m.toISOString()
m.format()

Populating a database in a Laravel migration file

I know this is an old post but since it comes up in a google search I thought I'd share some knowledge here. @erin-geyer pointed out that mixing migrations and seeders can create headaches and @justamartin countered that sometimes you want/need data to be populated as part of your deployment.

I'd go one step further and say that sometimes it is desirable to be able to roll out data changes consistently so that you can for example deploy to staging, see that all is well, and then deploy to production with confidence of the same results (and not have to remember to run some manual step).

However, there is still value in separating out the seed and the migration as those are two related but distinct concerns. Our team has compromised by creating migrations which call seeders. This looks like:

public function up()
{
    Artisan::call( 'db:seed', [
        '--class' => 'SomeSeeder',
        '--force' => true ]
    );
}

This allows you to execute a seed one time just like a migration. You can also implement logic that prevents or augments behavior. For example:

public function up()
{
    if ( SomeModel::count() < 10 )
    {
        Artisan::call( 'db:seed', [
            '--class' => 'SomeSeeder',
            '--force' => true ]
        );
    }
}

This would obviously conditionally execute your seeder if there are less than 10 SomeModels. This is useful if you want to include the seeder as a standard seeder that executed when you call artisan db:seed as well as when you migrate so that you don't "double up". You may also create a reverse seeder so that rollbacks works as expected, e.g.

public function down()
{
    Artisan::call( 'db:seed', [
        '--class' => 'ReverseSomeSeeder',
        '--force' => true ]
    );
}

The second parameter --force is required to enable to seeder to run in a production environment.

App can't be opened because it is from an unidentified developer

You can also use the xattr command as in Stack Overflow question How do I remove the "extended attributes" on a file in Mac OS X?.

Just remove the com.apple.quarantine attribute. It works even if you don't have an administrator account, which can be a plus. After that, the app isn't considered "downloaded" and is therefore not blocked.

How to resolve "local edit, incoming delete upon update" message

Try to resolve the conflict using

svn resolve --accept=working PATH

Good PHP ORM Library?

If you are looking for an ORM, like Hibernate, you should have look at PMO.

It can be easily integrated in an SOA architecture (there is only a webservice classe to develop).

WordPress path url in js script file

According to the Wordpress documentation, you should use wp_localize_script() in your functions.php file. This will create a Javascript Object in the header, which will be available to your scripts at runtime.

See Codex

Example:

<?php wp_localize_script('mylib', 'WPURLS', array( 'siteurl' => get_option('siteurl') )); ?>

To access this variable within in Javascript, you would simply do:

<script type="text/javascript">
    var url = WPURLS.siteurl;
</script>

How to reload page every 5 seconds?

Answer provided by @jAndy should work but in Firefox you may face problem, window.location.reload(1); might not work, that's my personal experience.

So i would like to suggest:

setTimeout(function() { window.location=window.location;},5000);

This is tested and works fine.