return error message with actionResult

Inside Controller Action you can access HttpContext.Response. There you can set the response status as in the following listing.

[HttpPost]
public ActionResult PostViaAjax()
{
    var body = Request.BinaryRead(Request.TotalBytes);

    var result = Content(JsonError(new Dictionary<string, string>()
    {
        {"err", "Some error!"}
    }), "application/json; charset=utf-8");
    HttpContext.Response.StatusCode = (int)HttpStatusCode.BadRequest;
    return result;
}

In MVC, how do I return a string result?

There Are 2 ways to return a string from the controller to the view:

First

You could return only the string, but it will not be included in your .cshtml file. it will be just a string appearing in your browser.

Second

You could return a string as the Model object of View Result.

Here is the code sample to do this:

public class HomeController : Controller
{
    // GET: Home
    // this will return just a string, not html
    public string index()
    {
        return "URL to show";
    }

    public ViewResult AutoProperty()
    {   
        string s = "this is a string ";
        // name of view , object you will pass
        return View("Result", s);

    }
}

In the view file to run AutoProperty, It will redirect you to the Result view and will send s
code to the view

<!--this will make this file accept string as it's model-->
@model string

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Result</title>
</head>
<body>
    <!--this will represent the string -->
    @Model
</body>
</html>

I run this at http://localhost:60227/Home/AutoProperty.

Change Bootstrap input focus blue glow

Building up on @wasinger's reply above, in Bootstrap 4.5 I had to override not only the color variables but also the box-shadow itself.

$input-focus-width: .2rem !default;
$input-focus-color: rgba($YOUR_COLOR, .25) !default;
$input-focus-border-color: rgba($YOUR_COLOR, .5) !default;
$input-focus-box-shadow: 0 0 0 $input-focus-width $input-focus-color !default;

What is the apply function in Scala?

Here is a small example for those who want to peruse quickly

 object ApplyExample01 extends App {


  class Greeter1(var message: String) {
    println("A greeter-1 is being instantiated with message " + message)


  }

  class Greeter2 {


    def apply(message: String) = {
      println("A greeter-2 is being instantiated with message " + message)
    }
  }

  val g1: Greeter1 = new Greeter1("hello")
  val g2: Greeter2 = new Greeter2()

  g2("world")


}

output

A greeter-1 is being instantiated with message hello

A greeter-2 is being instantiated with message world

How do I add an existing directory tree to a project in Visual Studio?

Visual Studio 2017 and newer support a new lightweight .csproj format which has come to be known as "SDK format". One of several advantages of this format is that instead of containing a list of files and folders which are included, files are wildcard included by default. Therefore, with this new format, your files and folders - added in Explorer or on the command line - will get picked up automatically!

The SDK format .csproj file currently works with the following project types:

Class library projects
Console apps
ASP.NET Core web apps
.NET Core projects of any type

To use the new format, create a new .NET Core or .NET Standard project. Because the templates haven't been updated for the full .NET Framework even in Visual Studio 2019, to create a .NET class library choose the .NET Standard Library template, and then edit the project file to target the framework version of your choice (the new style project format can be edited inside Visual Studio - just right click the project in the Solution Explorer and select "Edit project file"). For example:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net46</TargetFramework>
  </PropertyGroup>
</Project>

Oracle PL/SQL - Raise User-Defined Exception With Custom SQLERRM

create or replace PROCEDURE PROC_USER_EXP 
AS
duplicate_exp EXCEPTION;
PRAGMA EXCEPTION_INIT( duplicate_exp, -20001 );
LVCOUNT NUMBER;
BEGIN
  SELECT COUNT(*) INTO LVCOUNT FROM JOBS WHERE JOB_TITLE='President';
  IF LVCOUNT >1 THEN 
   raise_application_error( -20001, 'Duplicate president customer excetpion' );
  END IF;

  EXCEPTION 
  WHEN duplicate_exp THEN 
  DBMS_OUTPUT.PUT_LINE(sqlerrm);
END PROC_USER_EXP;

ORACLE 11g output will be like this:

Connecting to the database HR. 
ORA-20001: Duplicate president customer excetpion 
Process exited. 
Disconnecting from the database HR

How to check if JavaScript object is JSON

I combine the typeof operator with a check of the constructor attribute (by Peter):

var typeOf = function(object) {
    var firstShot = typeof object;
    if (firstShot !== 'object') {
        return firstShot;
    } 
    else if (object.constructor === [].constructor) {
        return 'array';
    }
    else if (object.constructor === {}.constructor) {
        return 'object';
    }
    else if (object === null) {
        return 'null';
    }
    else {
        return 'don\'t know';
    } 
}

// Test
var testSubjects = [true, false, 1, 2.3, 'string', [4,5,6], {foo: 'bar'}, null, undefined];

console.log(['typeOf()', 'input parameter'].join('\t'))
console.log(new Array(28).join('-'));
testSubjects.map(function(testSubject){
    console.log([typeOf(testSubject), JSON.stringify(testSubject)].join('\t\t'));
});

Result:

typeOf()    input parameter
---------------------------
boolean     true
boolean     false
number      1
number      2.3
string      "string"
array       [4,5,6]
object      {"foo":"bar"}
null        null
undefined

angularjs getting previous route path

This alternative also provides a back function.

The template:

<a ng-click='back()'>Back</a>

The module:

myModule.run(function ($rootScope, $location) {

    var history = [];

    $rootScope.$on('$routeChangeSuccess', function() {
        history.push($location.$$path);
    });

    $rootScope.back = function () {
        var prevUrl = history.length > 1 ? history.splice(-2)[0] : "/";
        $location.path(prevUrl);
    };

});

Cast Double to Integer in Java

double a = 13.34;
int b = (int) a;

System.out.println(b); //prints 13

Change the Arrow buttons in Slick slider

You can easily create your own style of arrow with the .slick-next:before and the .slick-prev:after pseudo-classes.

Here's an example:

.slick-prev:before {
  content: "<";
  color: red;
  font-size: 30px;
}

.slick-next:before {
  content: ">";
  color: red;
  font-size: 30px;
}

Using Cygwin to Compile a C program; Execution error

Regarding the cygwin1.dll not found error, a solution I have used for at least 8 years is to add the Cygwin bin directories to the end of my %PATH% in My Computer -> Properties -> Advanced -> Environment Variables. I add them to the end of the path so in my normal work, they are searched last, minimizing the possibility of conflicts (in fact, I have had no problems with conflicts in all this time).

When you invoke the Cygwin Bash Shell, those directories get prepended to the %PATH% so everything works as intended in that environment as well.

When not running in Cygwin shell, my %PATH% is:

Path=c:\opt\perl\bin; \
     ...
     C:\opt\cygwin\bin; \
     C:\opt\cygwin\usr\bin; \
     C:\opt\cygwin\usr\local\bin;

This way, for example, ActiveState Perl's perl is found first when I am not in a Cygwin Shell, but the Cygwin perl is found when I am working in the Cygwin Shell.

Cell spacing in UICollectionView

Answer for Swift 3.0, Xcode 8

1.Make sure you set collection view delegate

class DashboardViewController: UIViewController {
    @IBOutlet weak var dashboardCollectionView: UICollectionView!

    override func viewDidLoad() {
        super.viewDidLoad()
        dashboardCollectionView.delegate = self
    }
}

2.Implement UICollectionViewDelegateFlowLayout protocol, not UICollectionViewDelegate.

extension DashboardViewController: UICollectionViewDelegateFlowLayout {
    fileprivate var sectionInsets: UIEdgeInsets {
        return .zero
    }

    fileprivate var itemsPerRow: CGFloat {
        return 2
    }

    fileprivate var interitemSpace: CGFloat {
        return 5.0
    }

    func collectionView(_ collectionView: UICollectionView,
                        layout collectionViewLayout: UICollectionViewLayout,
                        sizeForItemAt indexPath: IndexPath) -> CGSize {
        let sectionPadding = sectionInsets.left * (itemsPerRow + 1)
        let interitemPadding = max(0.0, itemsPerRow - 1) * interitemSpace
        let availableWidth = collectionView.bounds.width - sectionPadding - interitemPadding
        let widthPerItem = availableWidth / itemsPerRow

        return CGSize(width: widthPerItem, height: widthPerItem)
    }

    func collectionView(_ collectionView: UICollectionView,
                        layout collectionViewLayout: UICollectionViewLayout,
                        insetForSectionAt section: Int) -> UIEdgeInsets {
        return sectionInsets
    }

    func collectionView(_ collectionView: UICollectionView,
                        layout collectionViewLayout: UICollectionViewLayout,
                        minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 0.0
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return interitemSpace
    }
}

CSS selector for "foo that contains bar"?

Only thing that comes even close is the :contains pseudo class in CSS3, but that only selects textual content, not tags or elements, so you're out of luck.

A simpler way to select a parent with specific children in jQuery can be written as (with :has()):

$('#parent:has(#child)');

Get content of a DIV using JavaScript

You need to set Div2 to Div1's innerHTML. Also, JavaScript is case sensitive - in your HTML, the id Div2 is DIV2. Also, you should use document, not Document:

var MyDiv1 = document.getElementById('DIV1');
var MyDiv2 = document.getElementById('DIV2');
MyDiv2.innerHTML = MyDiv1.innerHTML;

Here is a JSFiddle: http://jsfiddle.net/gFN6r/.

How to choose an AWS profile when using boto3 to connect to CloudFront

I think the docs aren't wonderful at exposing how to do this. It has been a supported feature for some time, however, and there are some details in this pull request.

So there are three different ways to do this:

Option A) Create a new session with the profile

    dev = boto3.session.Session(profile_name='dev')

Option B) Change the profile of the default session in code

    boto3.setup_default_session(profile_name='dev')

Option C) Change the profile of the default session with an environment variable

    $ AWS_PROFILE=dev ipython
    >>> import boto3
    >>> s3dev = boto3.resource('s3')

Removing array item by value

You can use array_splice function for this operation Ref : array_splice

array_splice($array, array_search(58, $array ), 1);

Huge performance difference when using group by vs distinct

The two queries express the same question. Apparently the query optimizer chooses two different execution plans. My guess would be that the distinct approach is executed like:

Copy all business_key values to a temporary table
Sort the temporary table
Scan the temporary table, returning each item that is different from the one before it

The group by could be executed like:

Scan the full table, storing each value of business key in a hashtable
Return the keys of the hashtable

The first method optimizes for memory usage: it would still perform reasonably well when part of the temporary table has to be swapped out. The second method optimizes for speed, but potentially requires a large amount of memory if there are a lot of different keys.

Since you either have enough memory or few different keys, the second method outperforms the first. It's not unusual to see performance differences of 10x or even 100x between two execution plans.

How to make URL/Phone-clickable UILabel?

https://github.com/mattt/TTTAttributedLabel

That's definitely what you need. You can also apply attributes for your label, like underline, and apply different colors to it. Just check the instructions for clickable urls.

Mainly, you do something like the following:

NSRange range = [label.text rangeOfString:@"me"];
[label addLinkToURL:[NSURL URLWithString:@"http://github.com/mattt/"] withRange:range]; // Embedding a custom link in a substring

SQL Server - Create a copy of a database table and place it in the same database?

This is another option:

select top 0 * into <new_table> from <original_table>

Read XML file into XmlDocument

If your .NET version is newer than 3.0 you can try using System.Xml.Linq.XDocument instead of XmlDocument. It is easier to process data with XDocument.

Android webview slow

I was having this same issue and I had to work it out. I tried these solutions, but at the end the performance, at least for the scrolling didn't improve at all. So here the workaroud that I did perform and the explanation of why it did work for me.

If you had the chance to explore the drag events, just a little, by creating a "MiWebView" Class, overwriting the "onTouchEvent" method and at least printed the time in which every drag event occurs, you'll see that they are separated in time for (down to) 9ms away. That is a very short time in between events.

Take a look at the WebView Source Code, and just see the onTouchEvent function. It is just impossible for it to be handled by the processor in less than 9ms (Keep on dreaming!!!). That's why you constantly see the "Miss a drag as we are waiting for WebCore's response for touch down." message. The code just can't be handled on time.

How to fix it? First, you can not re-write the onTouchEvent code to improve it, it is just too much. But, you can "mock it" in order to limit the event rate for dragging movements let's say to 40ms or 50ms. (this depends on the processor).

All touch events go like this: ACTION_DOWN -> ACTION_MOVE......ACTION_MOVE -> ACTION_UP. So we need to keep the DOWN and UP movements and filter the MOVE rate (these are the bad guys).

And here is a way to do it (you can add more event types like 2 fingers touch, all I'm interested here is the single finger scrolling).

import android.content.Context;
import android.view.MotionEvent;
import android.webkit.WebView;


public class MyWebView extends WebView{

    public MyWebView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

    private long lastMoveEventTime = -1;
    private int eventTimeInterval = 40;

    @Override
    public boolean onTouchEvent(MotionEvent ev) {

        long eventTime = ev.getEventTime();
        int action = ev.getAction();

        switch (action){
            case MotionEvent.ACTION_MOVE: {
                if ((eventTime - lastMoveEventTime) > eventTimeInterval){
                    lastMoveEventTime = eventTime;
                    return super.onTouchEvent(ev);
                }
                break;
            }
            case MotionEvent.ACTION_DOWN:
            case MotionEvent.ACTION_UP: {
                return super.onTouchEvent(ev);
            }
        }
        return true;
    }
}

Of course Use this class instead of WebView and you'll see the difference when scrolling.

This is just an approach to a solution, yet still not fully implemented for all lag cases due to screen touching when using WebView. However it is the best solution I found, at least for my specific needs.

How to implement my very own URI scheme on Android

As the question is asked years ago, and Android is evolved a lot on this URI scheme.
From original URI scheme, to deep link, and now Android App Links.

Android now recommends to use HTTP URLs, not define your own URI scheme. Because Android App Links use HTTP URLs that link to a website domain you own, so no other app can use your links. You can check the comparison of deep link and Android App links from here

Now you can easily add a URI scheme by using Android Studio option: Tools > App Links Assistant. Please refer the detail to Android document: https://developer.android.com/studio/write/app-link-indexing.html

ORA-00907: missing right parenthesis

ORA-00907: missing right parenthesis

This is one of several generic error messages which indicate our code contains one or more syntax errors. Sometimes it may mean we literally have omitted a right bracket; that's easy enough to verify if we're using an editor which has a match bracket capability (most text editors aimed at coders do). But often it means the compiler has come across a keyword out of context. Or perhaps it's a misspelled word, a space instead of an underscore or a missing comma.

Unfortunately the possible reasons why our code won't compile is virtually infinite and the compiler just isn't clever enough to distinguish them. So it hurls a generic, slightly cryptic, message like ORA-00907: missing right parenthesis and leaves it to us to spot the actual bloomer.

The posted script has several syntax errors. First I will discuss the error which triggers that ORA-0097 but you'll need to fix them all.

Foreign key constraints can be declared in line with the referencing column or at the table level after all the columns have been declared. These have different syntaxes; your scripts mix the two and that's why you get the ORA-00907.

In-line declaration doesn't have a comma and doesn't include the referencing column name.

CREATE TABLE historys_T    (
    history_record    VARCHAR2 (8),
    customer_id       VARCHAR2 (8) 
          CONSTRAINT historys_T_FK FOREIGN KEY REFERENCES T_customers ON DELETE CASCADE,
    order_id           VARCHAR2 (10) NOT NULL,
          CONSTRAINT fk_order_id_orders REFERENCES orders ON DELETE CASCADE)

Table level constraints are a separate component, and so do have a comma and do mention the referencing column.

CREATE TABLE historys_T    (
    history_record    VARCHAR2 (8),
    customer_id       VARCHAR2 (8),    
    order_id           VARCHAR2 (10) NOT NULL,
    CONSTRAINT historys_T_FK FOREIGN KEY (customer_id) REFERENCES T_customers ON DELETE CASCADE,   
   CONSTRAINT fk_order_id_orders FOREIGN KEY (order_id) REFERENCES orders ON DELETE CASCADE)

Here is a list of other syntax errors:

The referenced table (and the referenced primary key or unique constraint) must already exist before we can create a foreign key against them. So you cannot create a foreign key for HISTORYS_T before you have created the referenced ORDERS table.
You have misspelled the names of the referenced tables in some of the foreign key clauses (LIBRARY_T and FORMAT_T).
You need to provide an expression in the DEFAULT clause. For DATE columns that is usually the current date, DATE DEFAULT sysdate.

Looking at our own code with a cool eye is a skill we all need to gain to be successful as developers. It really helps to be familiar with Oracle's documentation. A side-by-side comparison of your code and the examples in the SQL Reference would have helped you resolved these syntax errors in considerably less than two days. Find it here (11g) and here (12c).

As well as syntax errors, your scripts contain design mistakes. These are not failures, but bad practice which should not become habits.

You have not named most of your constraints. Oracle will give them a default name but it will be a horrible one, and makes the data dictionary harder to understand. Explicitly naming every constraint helps us navigate the physical database. It also leads to more comprehensible error messages when our SQL trips a constraint violation.
Name your constraints consistently. HISTORY_T has constraints called historys_T_FK and fk_order_id_orders, neither of which is helpful. A useful convention is <child_table>_<parent_table>_fk. So history_customer_fk and history_order_fk respectively.
It can be useful to create the constraints with separate statements. Creating tables then primary keys then foreign keys will avoid the problems with dependency ordering identified above.
You are trying to create cyclic foreign keys between LIBRARY_T and FORMATS. You could do this by creating the constraints in separate statement but don't: you will have problems when inserting rows and even worse problems with deletions. You should reconsider your data model and find a way to model the relationship between the two tables so that one is the parent and the other the child. Or perhaps you need a different kind of relationship, such as an intersection table.
Avoid blank lines in your scripts. Some tools will handle them but some will not. We can configure SQL*Plus to handle them but it's better to avoid the need.
The naming convention of LIBRARY_T is ugly. Try to find a more expressive name which doesn't require a needless suffix to avoid a keyword clash.
T_CUSTOMERS is even uglier, being both inconsistent with your other tables and completely unnecessary, as customers is not a keyword.

Naming things is hard. You wouldn't believe the wrangles I've had about table names over the years. The most important thing is consistency. If I look at a data dictionary and see tables called T_CUSTOMERS and LIBRARY_T my first response would be confusion. Why are these tables named with different conventions? What conceptual difference does this express? So, please, decide on a naming convention and stick to. Make your table names either all singular or all plural. Avoid prefixes and suffixes as much as possible; we already know it's a table, we don't need a T_ or a _TAB.

delete_all vs destroy_all?

delete_all is a single SQL DELETE statement and nothing more. destroy_all calls destroy() on all matching results of :conditions (if you have one) which could be at least NUM_OF_RESULTS SQL statements.

If you have to do something drastic such as destroy_all() on large dataset, I would probably not do it from the app and handle it manually with care. If the dataset is small enough, you wouldn't hurt as much.

How to convert date to timestamp?

Answers have been provided by other developers but in my own way, you can do this on the fly without creating any user defined function as follows:

var timestamp = Date.parse("26-02-2012".split('-').reverse().join('-'));
alert(timestamp); // returns 1330214400000

Settings to Windows Firewall to allow Docker for Windows to share drive

Seem like many having this issue when running Cisco AnyConnect. I got the same problem and here is how I solved:

The cause: The subnet being used by Docker is in the list of Secured Routes managed by Cisco AnyConnect (I believe this list is managed by your VPN's admin).

The solution: Change the subnet used by Docker to not overlap with the list being managed by AnyConnect.

For example, in my case, I changed from 10.0.75.0 (which was overlapped with 10.0.0.0/8) to 172.31.0.0/28.

You need to use a Theme.AppCompat theme (or descendant) with this activity

In your app/build.gradle add this dependency:

implementation "com.google.android.material:material:1.1.0-alpha03"

Update your styles.xml AppTheme's parent:

<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar"/>

Using setDate in PreparedStatement

❐ Using `java.sql.Date`

If your table has a column of type DATE:

java.lang.String

The method java.sql.Date.valueOf(java.lang.String) received a string representing a date in the format yyyy-[m]m-[d]d. e.g.:
```
ps.setDate(2, java.sql.Date.valueOf("2013-09-04"));
```
java.util.Date

Suppose you have a variable endDate of type java.util.Date, you make the conversion thus:
```
ps.setDate(2, new java.sql.Date(endDate.getTime());
```

Current

If you want to insert the current date:

ps.setDate(2, new java.sql.Date(System.currentTimeMillis()));

// Since Java 8
ps.setDate(2, java.sql.Date.valueOf(java.time.LocalDate.now()));

❐ Using `java.sql.Timestamp`

If your table has a column of type TIMESTAMP or DATETIME:

java.lang.String

The method java.sql.Timestamp.valueOf(java.lang.String) received a string representing a date in the format yyyy-[m]m-[d]d hh:mm:ss[.f...]. e.g.:
```
ps.setTimestamp(2, java.sql.Timestamp.valueOf("2013-09-04 13:30:00");
```
java.util.Date

Suppose you have a variable endDate of type java.util.Date, you make the conversion thus:
```
ps.setTimestamp(2, new java.sql.Timestamp(endDate.getTime()));
```

Current

If you require the current timestamp:

ps.setTimestamp(2, new java.sql.Timestamp(System.currentTimeMillis()));

// Since Java 8
ps.setTimestamp(2, java.sql.Timestamp.from(java.time.Instant.now()));
ps.setTimestamp(2, java.sql.Timestamp.valueOf(java.time.LocalDateTime.now()));

What is trunk, branch and tag in Subversion?

If you're new to Subversion you may want to check out this post on SmashingMagazine.com, appropriately titled Ultimate Round-Up for Version Control with SubVersion.

It covers getting started with SubVersion with links to tutorials, reference materials, & book suggestions.

It covers tools (many are compatible windows), and it mentions AnkhSVN as a Visual Studio compatible plugin. The comments also mention VisualSVN as an alternative.

How do I export a project in the Android studio?

From the menu:

Build|Generate Signed APK

Build|Build APK

(the latter if you don't need a signed one to publish to the Play Store)

What are all the common ways to read a file in Ruby?

return last n lines from your_file.log or .txt

path = File.join(Rails.root, 'your_folder','your_file.log')

last_100_lines = `tail -n 100 #{path}`

npm not working - "read ECONNRESET"

I found "npm config edit" to be more useful to update the entries for https-proxy, proxy, registry

I did something like this

npm config list
npm config edit (opens in vi)
Edit or set the config entries for https-proxy, proxy, registry
npm install

How can you represent inheritance in a database?

Check out the answer I gave here

Fluent NHibernate one-to-one mapping with synthetic keys

"Cannot allocate an object of abstract type" error

In C++ a class with at least one pure virtual function is called abstract class. You can not create objects of that class, but may only have pointers or references to it.

If you are deriving from an abstract class, then make sure you override and define all pure virtual functions for your class.

From your snippet Your class AliceUniversity seems to be an abstract class. It needs to override and define all the pure virtual functions of the classes Graduate and UniversityGraduate.

Pure virtual functions are the ones with = 0; at the end of declaration.

Example: virtual void doSomething() = 0;

For a specific answer, you will need to post the definition of the class for which you get the error and the classes from which that class is deriving.

PHP Checking if the current date is before or after a set date

Use strtotime to convert any date to unix timestamp and compare.

Updating a java map entry

If key is present table.put(key, val) will just overwrite the value else it'll create a new entry. Poof! and you are done. :)

you can get the value from a map by using key is table.get(key); That's about it

Disable Rails SQL logging in console

This might not be a suitable solution for the console, but Rails has a method for this problem: Logger#silence

ActiveRecord::Base.logger.silence do
  # the stuff you want to be silenced
end

How do I empty an array in JavaScript?

In case you are interested in the memory allocation, you may compare each approach using something like this jsfiddle in conjunction with chrome dev tools' timeline tab. You will want to use the trash bin icon at the bottom to force a garbage collection after 'clearing' the array. This should give you a more definite answer for the browser of your choice. A lot of answers here are old and I wouldn't rely on them but rather test as in @tanguy_k's answer above.

(for an intro to the aforementioned tab you can check out here)

Stackoverflow forces me to copy the jsfiddle so here it is:

<html>
<script>
var size = 1000*100
window.onload = function() {
  document.getElementById("quantifier").value = size
}

function scaffold()
{
  console.log("processing Scaffold...");
  a = new Array
}
function start()
{
  size = document.getElementById("quantifier").value
  console.log("Starting... quantifier is " + size);
  console.log("starting test")
  for (i=0; i<size; i++){
    a[i]="something"
  }
  console.log("done...")
}

function tearDown()
{
  console.log("processing teardown");
  a.length=0
}

</script>
<body>
    <span style="color:green;">Quantifier:</span>
    <input id="quantifier" style="color:green;" type="text"></input>
    <button onclick="scaffold()">Scaffold</button>
    <button onclick="start()">Start</button>
    <button onclick="tearDown()">Clean</button>
    <br/>
</body>
</html>

And you should take note that it may depend on the type of the array elements, as javascript manages strings differently than other primitive types, not to mention arrays of objects. The type may affect what happens.

jQuery to remove an option from drop down list, given option's text/value

I know it is very late but following approach can also be used:

<select id="type" name="type" >
    <option value="Permanent" id="permanent">I am here to stay.</option>
    <option value="toremove" id="toremove">Remove me!</option>
    <option value="Other" id="other">Other</option>
</select>

and if I have to remove second option (id=toremove), the script would look like

$('#toremove').hide();

Oracle Partition - Error ORA14400 - inserted partition key does not map to any partition

select partition_name,column_name,high_value,partition_position
from ALL_TAB_PARTITIONS a , ALL_PART_KEY_COLUMNS b 
where table_name='YOUR_TABLE' and a.table_name = b.name;

This query lists the column name used as key and the allowed values. make sure, you insert the allowed values(high_value). Else, if default partition is defined, it would go there.

EDIT:

I presume, your TABLE DDL would be like this.

CREATE TABLE HE0_DT_INF_INTERFAZ_MES
  (
    COD_PAIS NUMBER,
    FEC_DATA NUMBER,
    INTERFAZ VARCHAR2(100)
  )
  partition BY RANGE(COD_PAIS, FEC_DATA)
  (
    PARTITION PDIA_98_20091023 VALUES LESS THAN (98,20091024)
  );

Which means I had created a partition with multiple columns which holds value less than the composite range (98,20091024);

That is first COD_PAIS <= 98 and Also FEC_DATA < 20091024

Combinations And Result:

98, 20091024     FAIL
98, 20091023     PASS
99, ********     FAIL
97, ********     PASS
 < 98, ********     PASS

So the below INSERT fails with ORA-14400; because (98,20091024) in INSERT is EQUAL to the one in DDL but NOT less than it.

SQL> INSERT INTO HE0_DT_INF_INTERFAZ_MES(COD_PAIS, FEC_DATA, INTERFAZ)
                                  VALUES(98, 20091024, 'CTA');  2
INSERT INTO HE0_DT_INF_INTERFAZ_MES(COD_PAIS, FEC_DATA, INTERFAZ)
            *
ERROR at line 1:
ORA-14400: inserted partition key does not map to any partition

But, we I attempt (97,20091024), it goes through

SQL> INSERT INTO HE0_DT_INF_INTERFAZ_MES(COD_PAIS, FEC_DATA, INTERFAZ)
  2                                    VALUES(97, 20091024, 'CTA');

1 row created.

Angular 1 - get current URL parameters

Better would have been generate url like

app.dev/backend?type=surveys&id=2

and then use

var type=$location.search().type;
var id=$location.search().id;

and inject $location in controller.

Automatically get loop index in foreach loop in Perl

I have tried like....

@array = qw /tomato banana papaya potato/;             # Example array
my $count;                                             # Local variable initial value will be 0.
print "\nBefore For loop value of counter is $count";  # Just printing value before entering the loop.

for (@array) { print "\n",$count++," $_" ; }           # String and variable seperated by comma to
                                                       # execute the value and print.
undef $count;                                          # Undefining so that later parts again it will
                                                       # be reset to 0.

print "\nAfter for loop value of counter is $count";   # Checking the counter value after for loop.

In short...

@array = qw /a b c d/;
my $count;
for (@array) { print "\n",$count++," $_"; }
undef $count;

How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?

I found

dmesg | grep tty

doing the job.

Numpy: Creating a complex array from 2 real ones?

I am python novice so this may not be the most efficient method but, if I understand the intent of the question correctly, steps listed below worked for me.

>>> import numpy as np
>>> Data = np.random.random((100, 100, 1000, 2))
>>> result = np.empty(Data.shape[:-1], dtype=complex)
>>> result.real = Data[...,0]; result.imag = Data[...,1]
>>> print Data[0,0,0,0], Data[0,0,0,1], result[0,0,0]
0.0782889873474 0.156087854837 (0.0782889873474+0.156087854837j)

Flask Error: "Method Not Allowed The method is not allowed for the requested URL"

I also had similar problem where redirects were giving 404 or 405 randomly on my development server. It was an issue with gunicorn instances.

Turns out that I had not properly shut down the gunicorn instance before starting a new one for testing. Somehow both of the processes were running simultaneously, listening to the same port 8080 and interfering with each other. Strangely enough they continued running in background after I had killed all my terminals. Had to kill them manually using fuser -k 8080/tcp

Using CSS to insert text

The answer using jQuery that everyone seems to like has a major flaw, which is it is not scalable (at least as it is written). I think Martin Hansen has the right idea, which is to use HTML5 data-* attributes. And you can even use the apostrophe correctly:

html:

<div class="task" data-task-owner="Joe">mop kitchen</div>
<div class="task" data-task-owner="Charles" data-apos="1">vacuum hallway</div>

css:

div.task:before { content: attr(data-task-owner)"'s task - " ; }
div.task[data-apos]:before { content: attr(data-task-owner)"' task - " ; }

output:

Joe's task - mop kitchen
Charles' task - vacuum hallway

Difference between Build Solution, Rebuild Solution, and Clean Solution in Visual Studio?

Taken from this link:

Build means compile and link only the source files that have changed since the last build, while Rebuild means compile and link all source files regardless of whether they changed or not. Build is the normal thing to do and is faster. Sometimes the versions of project target components can get out of sync and rebuild is necessary to make the build successful. In practice, you never need to Clean.

Shell script to send email

mail -s "Your Subject" [email protected] < /file/with/mail/content

(/file/with/mail/content should be a plaintext file, not a file attachment or an image, etc)

HTML Input - already filled in text

The value content attribute gives the default value of the input element.

^{- http://www.w3.org/TR/html5/forms.html#attr-input-value}

To set the default value of an input element, use the value attribute.

<input type="text" value="default value">

How to get row data by clicking a button in a row in an ASP.NET gridview

<ItemTemplate>
     <asp:Button ID="Button1" runat="server" Text="Button" 
            OnClick="MyButtonClick" />
</ItemTemplate>

and your method

 protected void MyButtonClick(object sender, System.EventArgs e)
{
     //Get the button that raised the event
Button btn = (Button)sender;

    //Get the row that contains this button
GridViewRow gvr = (GridViewRow)btn.NamingContainer;
}

WooCommerce - get category for product page

I literally striped out this line of code from content-single-popup.php located in woocommerce folder in my theme directory.

global $product; 
echo $product->get_categories( ', ', ' ' . _n( ' ', '  ', $cat_count, 'woocommerce' ) . ' ', ' ' );

Since my theme that I am working on has integrated woocommerce in it, this was my solution.

Boolean.parseBoolean("1") = false...?

How about this?

boolean uses_votes =
  ( "|1|yes|on|true|"
      .indexOf("|"+o.get("uses_votes").toLowerCase()+"|")
      > -1
  );

Use Expect in a Bash script to provide a password to an SSH command

After looking for an answer for the question for months, I finally find a really best solution: writing a simple script.

#!/usr/bin/expect

set timeout 20

set cmd [lrange $argv 1 end]
set password [lindex $argv 0]

eval spawn $cmd
expect "assword:"   # matches both 'Password' and 'password'
send "$password\r";
interact

Put it to /usr/bin/exp, then you can use:

exp <password> ssh <anything>
exp <password> scp <anysrc> <anydst>

Done!

List attributes of an object

As written before using obj.__dict__ can handle common cases but some classes do not have the __dict__ attribute and use __slots__ (mostly for memory efficiency).

example for a more resilient way of doing this:

class A(object):
    __slots__ = ('x', 'y', )
    def __init__(self, x, y):
        self.x = x
        self.y = y


class B(object):
    def __init__(self, x, y):
        self.x = x
        self.y = y


def get_object_attrs(obj):
    try:
        return obj.__dict__
    except AttributeError:
        return {attr: getattr(obj, attr) for attr in obj.__slots__}


a = A(1,2)
b = B(1,2)
assert not hasattr(a, '__dict__')

print(get_object_attrs(a))
print(get_object_attrs(b))

this code's output:

{'x': 1, 'y': 2}
{'x': 1, 'y': 2}

Note1:
Python is a dynamic language and it is always better knowing the classes you trying to get the attributes from as even this code can miss some cases.

Note2:
this code outputs only instance variables meaning class variables are not provided. for example:

class A(object):
    url = 'http://stackoverflow.com'
    def __init__(self, path):
        self.path = path

print(A('/questions').__dict__)

code outputs:

{'path': '/questions'}

This code does not print the url class attribute and might omit wanted class attributes.
Sometimes we might think an attribute is an instance member but it is not and won't be shown using this example.

How can I send an xml body using requests library?

Pass in the straight XML instead of a dictionary.

How to uninstall Anaconda completely from macOS

The official instructions seem to be here: https://docs.anaconda.com/anaconda/install/uninstall/

but if you like me that didn't work for some reason and for some reason your conda was installed somewhere else with telling you do this:

rm -rf ~/opt

I have no idea why it was saved there but that's what did it for me.

This was useful to me in fixing my conda installation (if that is the reason you are uninstalling it in the first place like me): https://stackoverflow.com/a/60902863/1601580 that ended up fixing it for me. Not sure why conda was acting weird in the first place or installing things wrongly in the first place though...

Reading tab-delimited file with Pandas - works on Windows, but not on Mac

The biggest clue is the rows are all being returned on one line. This indicates line terminators are being ignored or are not present.

You can specify the line terminator for csv_reader. If you are on a mac the lines created will end with \rrather than the linux standard \n or better still the suspenders and belt approach of windows with \r\n.

pandas.read_csv(filename, sep='\t', lineterminator='\r')

You could also open all your data using the codecs package. This may increase robustness at the expense of document loading speed.

import codecs

doc = codecs.open('document','rU','UTF-16') #open for reading with "universal" type set

df = pandas.read_csv(doc, sep='\t')

Duplicate / Copy records in the same MySQL table

Alex's answer needs some care (e.g. locking or a transaction) in multi-client environments.

Assuming the AUTO ID field is the first one in the table (a usual case), we can make use of implicit transactions.

    CREATE TEMPORARY TABLE tmp SELECT * from invoices WHERE ...;
    ALTER TABLE tmp drop ID; # drop autoincrement field
    # UPDATE tmp SET ...; # just needed to change other unique keys
    INSERT INTO invoices SELECT 0,tmp.* FROM tmp;
    DROP TABLE tmp;

From the MySQL docs:

Using AUTO_INCREMENT: You can also explicitly assign NULL or 0 to the column to generate sequence numbers.

How to convert FormData (HTML5 object) to JSON

I am arriving late here. However, I made a simple method that checks for the input type="checkbox"

var formData = new FormData($form.get(0));
        var objectData = {};
        formData.forEach(function (value, key) {
            var updatedValue = value;
            if ($('input[name="' + key + '"]').attr("type") === "checkbox" && $('input[name="' + key + '"]').is(":checked")) {
                updatedValue = true; // we don't set false due to it is by default on HTML
            }
            objectData[key] = updatedValue;
        });
var jsonData = JSON.stringify(objectData);

I hope this helps somebody else.

How do I get Bin Path?

Path.GetDirectoryName(Application.ExecutablePath)

eg. value:

C:\Projects\ConsoleApplication1\bin\Debug

JavaScript: changing the value of onclick with or without jQuery

You shouldn't be using onClick any more if you are using jQuery. jQuery provides its own methods of attaching and binding events. See .click()

$(document).ready(function(){
    var js = "alert('B:' + this.id); return false;";
    // create a function from the "js" string
    var newclick = new Function(js);

    // clears onclick then sets click using jQuery
    $("#anchor").attr('onclick', '').click(newclick);
});

That should cancel the onClick function - and keep your "javascript from a string" as well.

The best thing to do would be to remove the onclick="" from the <a> element in the HTML code and switch to using the Unobtrusive method of binding an event to click.

You also said:

Using onclick = function() { return eval(js); } doesn't work because you are not allowed to use return in code passed to eval().

No - it won't, but onclick = eval("(function(){"+js+"})"); will wrap the 'js' variable in a function enclosure. onclick = new Function(js); works as well and is a little cleaner to read. (note the capital F) -- see documentation on Function() constructors

ggplot combining two plots from different data.frames

The only working solution for me, was to define the data object in the geom_line instead of the base object, ggplot.

Like this:

ggplot() + 
geom_line(data=Data1, aes(x=A, y=B), color='green') + 
geom_line(data=Data2, aes(x=C, y=D), color='red')

instead of

ggplot(data=Data1, aes(x=A, y=B), color='green') + 
geom_line() + 
geom_line(data=Data2, aes(x=C, y=D), color='red')

More info here

How do I make a https post in Node Js without any third party module?

For example, like this:

const querystring = require('querystring');
const https = require('https');

var postData = querystring.stringify({
    'msg' : 'Hello World!'
});

var options = {
  hostname: 'posttestserver.com',
  port: 443,
  path: '/post.php',
  method: 'POST',
  headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
       'Content-Length': postData.length
     }
};

var req = https.request(options, (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });
});

req.on('error', (e) => {
  console.error(e);
});

req.write(postData);
req.end();

Open new popup window without address bars in firefox & IE

I know this is a very old question, yes, I agree we can not hide address bar in modern browsers, but we can hide the url in address bar (e.g show url about:blank), following is my work around solution.

var iframe = '<html><head><style>body, html {width: 100%; height: 100%; margin: 0; padding: 0}</style></head><body><iframe src="https://www.w3schools.com" style="height:calc(100% - 4px);width:calc(100% - 4px)"></iframe></html></body>';

var win = window.open("","","width=600,height=480,toolbar=no,menubar=no,resizable=yes");
win.document.write(iframe);

I need a Nodejs scheduler that allows for tasks at different intervals

nodeJS default

https://nodejs.org/api/timers.html

setInterval(function() {
    // your function
}, 5000);

Difference between document.addEventListener and window.addEventListener?

The document and window are different objects and they have some different events. Using addEventListener() on them listens to events destined for a different object. You should use the one that actually has the event you are interested in.

For example, there is a "resize" event on the window object that is not on the document object.

For example, the "DOMContentLoaded" event is only on the document object.

So basically, you need to know which object receives the event you are interested in and use .addEventListener() on that particular object.

Here's an interesting chart that shows which types of objects create which types of events: https://developer.mozilla.org/en-US/docs/DOM/DOM_event_reference

If you are listening to a propagated event (such as the click event), then you can listen for that event on either the document object or the window object. The only main difference for propagated events is in timing. The event will hit the document object before the window object since it occurs first in the hierarchy, but that difference is usually immaterial so you can pick either. I find it generally better to pick the closest object to the source of the event that meets your needs when handling propagated events. That would suggest that you pick document over window when either will work. But, I'd often move even closer to the source and use document.body or even some closer common parent in the document (if possible).

Using Bootstrap Modal window as PartialView

I do this with mustache.js and templates (you could use any JavaScript templating library).

In my view, I have something like this:

<script type="text/x-mustache-template" id="modalTemplate">
    <%Html.RenderPartial("Modal");%>
</script>

...which lets me keep my templates in a partial view called Modal.ascx:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>
    <div>
        <div class="modal-header">
            <a class="close" data-dismiss="modal">&times;</a>
            <h3>{{Name}}</h3>
        </div>
        <div class="modal-body">
            <table class="table table-striped table-condensed">
                <tbody>
                    <tr><td>ID</td><td>{{Id}}</td></tr>
                    <tr><td>Name</td><td>{{Name}}</td></tr>
                </tbody>
            </table>
        </div>
        <div class="modal-footer">
            <a class="btn" data-dismiss="modal">Close</a>
        </div>
    </div>

I create placeholders for each modal in my view:

<%foreach (var item in Model) {%>
    <div data-id="<%=Html.Encode(item.Id)%>"
         id="modelModal<%=Html.Encode(item.Id)%>" 
         class="modal hide fade">
    </div>
<%}%>

...and make ajax calls with jQuery:

<script type="text/javascript">
    var modalTemplate = $("#modalTemplate").html()
    $(".modal[data-id]").each(function() {
        var $this = $(this)
        var id = $this.attr("data-id")
        $this.on("show", function() {
            if ($this.html()) return
            $.ajax({
                type: "POST",
                url: "<%=Url.Action("SomeAction")%>",
                data: { id: id },
                success: function(data) {
                    $this.append(Mustache.to_html(modalTemplate, data))
                }
            })
        })
    })
</script>

Then, you just need a trigger somewhere:

<%foreach (var item in Model) {%>
    <a data-toggle="modal" href="#modelModal<%=Html.Encode(item.Id)%>">
        <%=Html.Encode(item.DutModel.Name)%>
    </a>
<%}%>

Iterating over ResultSet and adding its value in an ArrayList

If I've understood your problem correctly, there are two possible problems here:

resultset is null - I assume that this can't be the case as if it was you'd get an exception in your while loop and nothing would be output.
The second problem is that resultset.getString(i++) will get columns 1,2,3 and so on from each subsequent row.

I think that the second point is probably your problem here.

Lets say you only had 1 row returned, as follows:

Col 1, Col 2, Col 3 
A    ,     B,     C

Your code as it stands would only get A - it wouldn't get the rest of the columns.

I suggest you change your code as follows:

ResultSet resultset = ...;
ArrayList<String> arrayList = new ArrayList<String>(); 
while (resultset.next()) {                      
    int i = 1;
    while(i <= numberOfColumns) {
        arrayList.add(resultset.getString(i++));
    }
    System.out.println(resultset.getString("Col 1"));
    System.out.println(resultset.getString("Col 2"));
    System.out.println(resultset.getString("Col 3"));                    
    System.out.println(resultset.getString("Col n"));
}

Edit:

To get the number of columns:

ResultSetMetaData metadata = resultset.getMetaData();
int numberOfColumns = metadata.getColumnCount();

Ternary operator (?:) in Bash

The following seems to work for my use cases:

Examples

$ tern 1 YES NO                                                                             
YES
    
$ tern 0 YES NO                                                                             
NO
    
$ tern 52 YES NO                                                                            
YES
    
$ tern 52 YES NO 52                                                                         
NO

and can be used in a script like so:

RESULT=$(tern 1 YES NO)
echo "The result is $RESULT"

tern

function show_help()
{
  echo ""
  echo "usage: BOOLEAN VALUE_IF_TRUE VALUE_IF_FALSE {FALSE_VALUE}"
  echo ""
  echo "e.g. "
  echo ""
  echo "tern 1 YES NO                            => YES"
  echo "tern 0 YES NO                            => NO"
  echo "tern "" YES NO                           => NO"
  echo "tern "ANY STRING THAT ISNT 1" YES NO     => NO"
  echo "ME=$(tern 0 YES NO)                      => ME contains NO"
  echo ""

  exit
}

if [ "$1" == "help" ]
then
  show_help
fi
if [ -z "$3" ]
then
  show_help
fi

# Set a default value for what is "false" -> 0
FALSE_VALUE=${4:-0}

function main
{
  if [ "$1" == "$FALSE_VALUE" ]; then
    echo $3
    exit;
  fi;

  echo $2
}

main "$1" "$2" "$3"

Lollipop : draw behind statusBar with its color set to transparent

@Cody Toombs's answer lead to an issue that brings the layout behind the navigation bar. So what I found is using this solution given by @Kriti

here is the Kotlin code snippet for the same:

if (Build.VERSION.SDK_INT >= 19 && Build.VERSION.SDK_INT < 21) {
    setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true)
}

if (Build.VERSION.SDK_INT >= 19) {
    window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
}

if (Build.VERSION.SDK_INT >= 21) {
    setWindowFlag(this, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false)
    getWindow().setStatusBarColor(Color.TRANSPARENT)
}

private fun setWindowFlag(activity: Activity, bits: Int, on: Boolean) {

    val win: Window = activity.getWindow()

    val winParams: WindowManager.LayoutParams = win.getAttributes()
    if (on) {
        winParams.flags = winParams.flags or bits
    } else {
        winParams.flags = winParams.flags and bits.inv()
    }
    win.setAttributes(winParams)
}

You also need to add

android:fitsSystemWindows="false"

root view of your layout.

Change fill color on vector asset in Android Studio

Currently the working soloution is android:fillColor="#FFFFFF"

Nothing worked for me except hard coding in the vector

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24.0"
      android:fillColor="#FFFFFF"
    android:viewportHeight="24.0">
<path
    android:fillColor="#FFFFFF"
    android:pathData="M15.5,14h-0.79l-0.28,-0.27C15.41,12.59 16,11.11 16,9.5 16,5.91 13.09,3 9.5,3S3,5.91 3,9.5 5.91,16 9.5,16c1.61,0 3.09,-0.59 4.23,-1.57l0.27,0.28v0.79l5,4.99L20.49,19l-4.99,-5zm-6,0C7.01,14 5,11.99 5,9.5S7.01,5 9.5,5 14,7.01 14,9.5 11.99,14 9.5,14z"/>

However, fillcolor and tint might work soon. Please see this discussion for more information:

https://code.google.com/p/android/issues/detail?id=186431

Also the colors mighr stick in the cache so deleting app for all users might help.

How to split a string in Ruby and get all items except the first one?

You can also do this:

String is ex="test1, test2, test3, test4, test5"
array = ex.split(/,/)
array.size.times do |i|
  p array[i]
end

How to configure Eclipse build path to use Maven dependencies?

Adding my answers for a couple of reasons:

Somehow none of the answers listed directly resolved my problem.
I couldn't find "Enable dependency management" under Maven. I'm using Eclipse 4.4.2 build on Wed, 4 Feb 2015.

What helped me was another option under Maven called as "Update Project" and then when I click it this window opens which has a checkbox that says "Force update of Snapshot/Releases". The real purpose of this checkbox is different I know but somehow it resolved the dependencies issue.

How can I check if an array contains a specific value in php?

Following is how you can do this:

<?php
$rooms = ['kitchen', 'bedroom', 'living_room', 'dining_room']; # this is your array
if(in_array('kitchen', $rooms)){
    echo 'this array contains kitchen';
}

Make sure that you search for kitchen and not Kitchen. This function is case sensitive. So, the below function simply won't work:

$rooms = ['kitchen', 'bedroom', 'living_room', 'dining_room']; # this is your array
if(in_array('KITCHEN', $rooms)){
    echo 'this array contains kitchen';
}

If you rather want a quick way to make this search case insensitive, have a look at the proposed solution in this reply: https://stackoverflow.com/a/30555568/8661779

Source: http://dwellupper.io/post/50/understanding-php-in-array-function-with-examples

Singletons vs. Application Context in Android?

My 2 cents:

I did notice that some singleton / static fields were reseted when my activity was destroyed. I noticed this on some low end 2.3 devices.

My case was very simple : I just have a private filed "init_done" and a static method "init" that I called from activity.onCreate(). I notice that the method init was re-executing itself on some re-creation of the activity.

While I cannot prove my affirmation, It may be related to WHEN the singleton/class was created/used first. When the activity get destroyed/recycled, it seem that all class that only this activity refer are recycled too.

I moved my instance of singleton to a sub class of Application. I acces them from the application instance. and, since then, did not notice the problem again.

I hope this can help someone.

Convert JSON format to CSV format for MS Excel

Using Python will be one easy way to achieve what you want.

I found one using Google.

"convert from json to csv using python" is an example.

Best way to use Google's hosted jQuery, but fall back to my hosted library on Google fail

Using Razor syntax in ASP.NET, this code provides fallback support and works with a virtual root:

@{var jQueryPath = Url.Content("~/Scripts/jquery-1.7.1.min.js");}
<script type="text/javascript">
    if (typeof jQuery == 'undefined')
        document.write(unescape("%3Cscript src='@jQueryPath' type='text/javascript'%3E%3C/script%3E"));
</script>

Or make a helper (helper overview):

@helper CdnScript(string script, string cdnPath, string test) {
    @Html.Raw("<script src=\"http://ajax.aspnetcdn.com/" + cdnPath + "/" + script + "\" type=\"text/javascript\"></script>" +
        "<script type=\"text/javascript\">" + test + " || document.write(unescape(\"%3Cscript src='" + Url.Content("~/Scripts/" + script) + "' type='text/javascript'%3E%3C/script%3E\"));</script>")
}

and use it like this:

@CdnScript("jquery-1.7.1.min.js", "ajax/jQuery", "window.jQuery")
@CdnScript("jquery.validate.min.js", "ajax/jquery.validate/1.9", "jQuery.fn.validate")

How to deal with missing src/test/java source folder in Android/Maven project?

Select project -> New -> Folder (not source folder) -> Select the project again -> Enter the folder name as (src/test/java) -> finish. That's it.

If the test source is missing, it would link it automatically. If not, then require to link it manually.

How does Python's super() work with multiple inheritance?

This is known as the Diamond Problem, the page has an entry on Python, but in short, Python will call the superclass's methods from left to right.

Split long commands in multiple lines through Windows batch file

It seems however that splitting in the middle of the values of a for loop doesn't need a caret(and actually trying to use one will be considered a syntax error). For example,

for %n in (hello
bye) do echo %n

Note that no space is even needed after hello or before bye.

Java path..Error of jvm.cfg

this should be an internal file of JRE and in general you shouldn't deal with it when you're running/compiling java.

Here you can find an explanation of what exactly this file is intended for. Bottom line, your Java installation is somehow corrupted, so as a first resort to resolve this issue, I suggest you to re-install jre.

You should ensure that you're installing the right jre for your architecture.

Hope, this helps

Using an IF Statement in a MySQL SELECT query

try this code worked for me

SELECT user_display_image AS user_image,
       user_display_name AS user_name,
       invitee_phone,
       (CASE WHEN invitee_status = 1 THEN "attending"
             WHEN invitee_status = 2 THEN "unsure"
             WHEN invitee_status = 3 THEN "declined"
             WHEN invitee_status = 0 THEN "notreviwed"
       END) AS invitee_status
  FROM your_table

Getting an "ambiguous redirect" error

Bash can be pretty obtuse sometimes.

The following commands all return different error messages for basically the same error:

$ echo hello >
bash: syntax error near unexpected token `newline`

$ echo hello > ${NONEXISTENT}
bash: ${NONEXISTENT}: ambiguous redirect

$ echo hello > "${NONEXISTENT}"
bash: : No such file or directory

Adding quotes around the variable seems to be a good way to deal with the "ambiguous redirect" message: You tend to get a better message when you've made a typing mistake -- and when the error is due to spaces in the filename, using quotes is the fix.

How to view or edit localStorage

How do I parse JSON in Android?

I've coded up a simple example for you and annotated the source. The example shows how to grab live json and parse into a JSONObject for detail extraction:

try{
    // Create a new HTTP Client
    DefaultHttpClient defaultClient = new DefaultHttpClient();
    // Setup the get request
    HttpGet httpGetRequest = new HttpGet("http://example.json");

    // Execute the request in the client
    HttpResponse httpResponse = defaultClient.execute(httpGetRequest);
    // Grab the response
    BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent(), "UTF-8"));
    String json = reader.readLine();

    // Instantiate a JSON object from the request response
    JSONObject jsonObject = new JSONObject(json);

} catch(Exception e){
    // In your production code handle any errors and catch the individual exceptions
    e.printStackTrace();
}

Once you have your JSONObject refer to the SDK for details on how to extract the data you require.

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

Here is a part of code I use to direct my server.js file to angular dist folder, which was created after npm build

// Create link to Angular build directory
var distDir = __dirname + "/dist/";
app.use(express.static(distDir));

I fixed it by changing "/dist/" to "./dist/"

Multi-character constant warnings

Simplest C/C++ any compiler/standard compliant solution, was mentioned by @leftaroundabout in comments above:

int x = *(int*)"abcd";

Or a bit more specific:

int x = *(int32_t*)"abcd";

One more solution, also compliant with C/C++ compiler/standard since C99 (except clang++, which has a known bug):

int x = ((union {char s[5]; int number;}){"abcd"}).number;

/* just a demo check: */
printf("x=%d stored %s byte first\n", x, x==0x61626364 ? "MSB":"LSB");

Here anonymous union is used to give a nice symbol-name to the desired numeric result, "abcd" string is used to initialize the lvalue of compound literal (C99).

CAML query with nested ANDs and ORs for multiple fields

You can try U2U Query Builder http://www.u2u.net/res/Tools/CamlQueryBuilder.aspx you can use their API U2U.SharePoint.CAML.Server.dll and U2U.SharePoint.CAML.Client.dll

I didn't use them but I'm sure it will help you achieving your task.

Is it possible to find out the users who have checked out my project on GitHub?

I believe this is an old question, and the Traffic was introduced by Github in 2014. Here is the link to the description of Traffic, that tells you the views on your repositories.

\n or \n in php echo not print

Better use PHP_EOL ("End Of Line") instead. It's cross-platform.

E.g.:

$unit1 = 'paragrahp1';
$unit2 = 'paragrahp2';
echo '<p>' . $unit1 . '</p>' . PHP_EOL;
echo '<p>' . $unit2 . '</p>';

Modify the legend of pandas bar plot

If you need to call plot multiply times, you can also use the "label" argument:

ax = df1.plot(label='df1', y='y_var')
ax = df2.plot(label='df2', y='y_var')

While this is not the case in the OP question, this can be helpful if the DataFrame is in long format and you use groupby before plotting.

How to sort a NSArray alphabetically?

The simplest approach is, to provide a sort selector (Apple's documentation for details)

Objective-C

sortedArray = [anArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];

Swift

let descriptor: NSSortDescriptor = NSSortDescriptor(key: "YourKey", ascending: true, selector: "localizedCaseInsensitiveCompare:")
let sortedResults: NSArray = temparray.sortedArrayUsingDescriptors([descriptor])

Apple provides several selectors for alphabetic sorting:

compare:
caseInsensitiveCompare:
localizedCompare:
localizedCaseInsensitiveCompare:
localizedStandardCompare:

Swift

var students = ["Kofi", "Abena", "Peter", "Kweku", "Akosua"]
students.sort()
print(students)
// Prints "["Abena", "Akosua", "Kofi", "Kweku", "Peter"]"

Reference

Prevent line-break of span element

With Bootstrap 4 Class:

text-nowrap

Ref: https://getbootstrap.com/docs/4.0/utilities/text/#text-wrapping-and-overflow

How do you run multiple programs in parallel from a bash script?

You can try ppss. ppss is rather powerful - you can even create a mini-cluster. xargs -P can also be useful if you've got a batch of embarrassingly parallel processing to do.

Numpy: Get random set of rows from 2D array

>>> A = np.random.randint(5, size=(10,3))
>>> A
array([[1, 3, 0],
       [3, 2, 0],
       [0, 2, 1],
       [1, 1, 4],
       [3, 2, 2],
       [0, 1, 0],
       [1, 3, 1],
       [0, 4, 1],
       [2, 4, 2],
       [3, 3, 1]])
>>> idx = np.random.randint(10, size=2)
>>> idx
array([7, 6])
>>> A[idx,:]
array([[0, 4, 1],
       [1, 3, 1]])

Putting it together for a general case:

A[np.random.randint(A.shape[0], size=2), :]

For non replacement (numpy 1.7.0+):

A[np.random.choice(A.shape[0], 2, replace=False), :]

I do not believe there is a good way to generate random list without replacement before 1.7. Perhaps you can setup a small definition that ensures the two values are not the same.

Regular Expression for matching parentheses

Because ( is special in regex, you should escape it \( when matching. However, depending on what language you are using, you can easily match ( with string methods like index() or other methods that enable you to find at what position the ( is in. Sometimes, there's no need to use regex.

Invalid use side-effecting operator Insert within a function

There is an exception (I'm using SQL 2014) when you are only using Insert/Update/Delete on Declared-Tables. These Insert/Update/Delete statements cannot contain an OUTPUT statement. The other restriction is that you are not allowed to do a MERGE, even into a Declared-Table. I broke up my Merge statements, that didn't work, into Insert/Update/Delete statements that did work.

The reason I didn't convert it to a stored-procedure is that the table-function was faster (even without the MERGE) than the stored-procedure. This is despite the stored-procedure allowing me to use Temp-Tables that have statistics. I needed the table-function to be very fast, since it is called 20-K times/day. This table function never updates the database.

I also noticed that the NewId() and RAND() SQL functions are not allowed in a function.

How to detect pressing Enter on keyboard using jQuery?

The easy way to detect whether the user has pressed enter is to use key number the enter key number is =13 to check the value of key in your device

$("input").keypress(function (e) {
  if (e.which == 32 || (65 <= e.which && e.which <= 65 + 25)
                    || (97 <= e.which && e.which <= 97 + 25)) {
    var c = String.fromCharCode(e.which);
    $("p").append($("<span/>"))
          .children(":last")
          .append(document.createTextNode(c));
  } else if (e.which == 8) {
    // backspace in IE only be on keydown
    $("p").children(":last").remove();
  }
  $("div").text(e.which);
});

by pressing the enter key you will get result as 13 . using the key value you can call a function or do whatever you wish

        $(document).keypress(function(e) {
      if(e.which == 13) {
console.log("User entered Enter key");
          // the code you want to run 
      }
    });

if you want to target a button once enter key is pressed you can use the code

    $(document).bind('keypress', function(e){
  if(e.which === 13) { // return
     $('#butonname').trigger('click');
  }
});

Hope it help

jQuery UI autocomplete with item and id

My code only worked when I added 'return false' to the select function. Without this, the input was set with the right value inside the select function and then it was set to the id value after the select function was over. The return false solved this problem.

$('#sistema_select').autocomplete({

    minLength: 3,
    source: <?php echo $lista_sistemas;?> ,
    select: function (event, ui) {
         $('#sistema_select').val(ui.item.label); // display the selected text
         $('#sistema_select_id').val(ui.item.value); // save selected id to hidden input
         return false;
     },
    change: function( event, ui ) {
        $( "#sistema_select_id" ).val( ui.item? ui.item.value : 0 );
    } 
});

In addition, I added a function to the change event because, if the user writes something in the input or erases a part of the item label after one item was selected, I need to update the hidden field so that I don´t get the wrong (outdated) id. For example, if my source is:

var $local_source = [
       {value: 1,  label: "c++"}, 
       {value: 2,  label: "java"}]

and the user type ja and select the 'java' option with the autocomplete, I store the value 2 in the hidden field. If the user erase a letter from 'java', por exemple ending up with 'jva' in the input field, I can´t pass to my code the id 2, because the user changed the value. In this case I set the id to 0.

How would I run an async Task<T> method synchronously?

    private int GetSync()
    {
        try
        {
            ManualResetEvent mre = new ManualResetEvent(false);
            int result = null;

            Parallel.Invoke(async () =>
            {
                result = await SomeCalcAsync(5+5);
                mre.Set();
            });

            mre.WaitOne();
            return result;
        }
        catch (Exception)
        {
            return null;
        }
    }

Get difference between two lists

Here is an simple way to distinguish two lists (whatever the contents are), you can get the result as shown below :

>>> from sets import Set
>>>
>>> l1 = ['xvda', False, 'xvdbb', 12, 'xvdbc']
>>> l2 = ['xvda', 'xvdbb', 'xvdbc', 'xvdbd', None]
>>>
>>> Set(l1).symmetric_difference(Set(l2))
Set([False, 'xvdbd', None, 12])

Hope this will helpful.

Add jars to a Spark Job - spark-submit

There is restriction on using --jars: if you want to specify a directory for location of jar/xml file, it doesn't allow directory expansions. This means if you need to specify absolute path for each jar.

If you specify --driver-class-path and you are executing in yarn cluster mode, then driver class doesn't get updated. We can verify if class path is updated or not under spark ui or spark history server under tab environment.

Option which worked for me to pass jars which contain directory expansions and which worked in yarn cluster mode was --conf option. It's better to pass driver and executor class paths as --conf, which adds them to spark session object itself and those paths are reflected on Spark Configuration. But Please make sure to put jars on the same path across the cluster.

spark-submit \
  --master yarn \
  --queue spark_queue \
  --deploy-mode cluster    \
  --num-executors 12 \
  --executor-memory 4g \
  --driver-memory 8g \
  --executor-cores 4 \
  --conf spark.ui.enabled=False \
  --conf spark.driver.extraClassPath=/usr/hdp/current/hbase-master/lib/hbase-server.jar:/usr/hdp/current/hbase-master/lib/hbase-common.jar:/usr/hdp/current/hbase-master/lib/hbase-client.jar:/usr/hdp/current/hbase-master/lib/zookeeper.jar:/usr/hdp/current/hbase-master/lib/hbase-protocol.jar:/usr/hdp/current/spark2-thriftserver/examples/jars/scopt_2.11-3.3.0.jar:/usr/hdp/current/spark2-thriftserver/examples/jars/spark-examples_2.10-1.1.0.jar:/etc/hbase/conf \
  --conf spark.hadoop.mapred.output.dir=/tmp \
  --conf spark.executor.extraClassPath=/usr/hdp/current/hbase-master/lib/hbase-server.jar:/usr/hdp/current/hbase-master/lib/hbase-common.jar:/usr/hdp/current/hbase-master/lib/hbase-client.jar:/usr/hdp/current/hbase-master/lib/zookeeper.jar:/usr/hdp/current/hbase-master/lib/hbase-protocol.jar:/usr/hdp/current/spark2-thriftserver/examples/jars/scopt_2.11-3.3.0.jar:/usr/hdp/current/spark2-thriftserver/examples/jars/spark-examples_2.10-1.1.0.jar:/etc/hbase/conf \
  --conf spark.hadoop.mapreduce.output.fileoutputformat.outputdir=/tmp

2 ways for "ClearContents" on VBA Excel, but 1 work fine. Why?

For numerical addressing of cells try to enable S1O1 checkbox in MS Excel settings. It is the second tab from top (i.e. Formulas), somewhere mid-page in my Hungarian version.

If enabled, it handles VBA addressing in both styles, i.e. Range("A1:B10") and Range(Cells(1, 1), Cells(10, 2)). I assume it handles Range("A1:B10") style only, if not enabled.

Good luck!

(Note, that Range("A1:B10") represents a 2x10 square, while Range(Cells(1, 1), Cells(10, 2)) represents 10x2. Using column numbers instead of letters will not affect the order of addresing.)

Is there a pretty print for PHP?

Expanding on @stephen's answer, added a few very minor tweaks for display purposes.

function pp($arr){
    $retStr = '<ul>';
    if (is_array($arr)){
        foreach ($arr as $key=>$val){
            if (is_array($val)){
                $retStr .= '<li>' . $key . ' => array(' . pp($val) . '),</li>';
            }else{
                $retStr .= '<li>' . $key . ' => ' . ($val == '' ? '""' : $val) . ',</li>';
            }
        }
    }
    $retStr .= '</ul>';
    return $retStr;
}

Will format any multidimensional array like so:

enter image description here

How do I change the font color in an html table?

Try this:

 <html>
    <head>
        <style>
            select {
              height: 30px;
              color: #0000ff;
            }
        </style>
    </head>
    <body>
        <table>
            <tbody>
                <tr>
                    <td>
                        <select name="test">
                            <option value="Basic">Basic : $30.00 USD - yearly</option>
                            <option value="Sustaining">Sustaining : $60.00 USD - yearly</option>
                            <option value="Supporting">Supporting : $120.00 USD - yearly</option>
                        </select>
                    </td>
                </tr>
            </tbody>
        </table>
    </body>
</html>

Resource interpreted as Document but transferred with MIME type application/zip

The problem

I had similar problem. Got message in js

Resource interpreted as Document but transferred with MIME type text/csv

But I also got message in chrome console

Mixed Content: The site at 'https://my-site/' was loaded over a secure connection, but the file at 'https://my-site/Download?id=99a50c7b' was redirected through an insecure connection. This file should be served over HTTPS. This download has been blocked

It says here that you need to use an secure connection (but scheme is https in message already, strangely...).

The problem is that href for file downloading builded on server side. And this href used http in my case.

The solution

So I changed scheme to https when build href for file downloading.

C++ correct way to return pointer to array from function

Your code (which looks ok) doesn't return a pointer to an array. It returns a pointer to the first element of an array.

In fact that's usually what you want to do. Most manipulation of arrays are done via pointers to individual elements, not via pointers to the array as a whole.

You can define a pointer to an array, for example this:

double (*p)[42];

defines p as a pointer to a 42-element array of doubles. A big problem with that is that you have to specify the number of elements in the array as part of the type -- and that number has to be a compile-time constant. Most programs that deal with arrays need to deal with arrays of varying sizes; a given array's size won't vary after it's been created, but its initial size isn't necessarily known at compile time, and different array objects can have different sizes.

A pointer to the first element of an array lets you use either pointer arithmetic or the indexing operator [] to traverse the elements of the array. But the pointer doesn't tell you how many elements the array has; you generally have to keep track of that yourself.

If a function needs to create an array and return a pointer to its first element, you have to manage the storage for that array yourself, in one of several ways. You can have the caller pass in a pointer to (the first element of) an array object, probably along with another argument specifying its size -- which means the caller has to know how big the array needs to be. Or the function can return a pointer to (the first element of) a static array defined inside the function -- which means the size of the array is fixed, and the same array will be clobbered by a second call to the function. Or the function can allocate the array on the heap -- which makes the caller responsible for deallocating it later.

Everything I've written so far is common to C and C++, and in fact it's much more in the style of C than C++. Section 6 of the comp.lang.c FAQ discusses the behavior of arrays and pointers in C.

But if you're writing in C++, you're probably better off using C++ idioms. For example, the C++ standard library provides a number of headers defining container classes such as <vector> and <array>, which will take care of most of this stuff for you. Unless you have a particular reason to use raw arrays and pointers, you're probably better off just using C++ containers instead.

EDIT : I think you edited your question as I was typing this answer. The new code at the end of your question is, as you observer, no good; it returns a pointer to an object that ceases to exist as soon as the function returns. I think I've covered the alternatives.

What is difference between sleep() method and yield() method of multi threading?

sleep()causes the thread to definitely stop executing for a given amount of time; if no other thread or process needs to be run, the CPU will be idle (and probably enter a power saving mode). yield()basically means that the thread is not doing anything particularly important and if any other threads or processes need to be run, they should. Otherwise, the current thread will continue to run.

Jersey stopped working with InjectionManagerFactory not found

Jersey 2.26 and newer are not backward compatible with older versions. The reason behind that has been stated in the release notes:

Unfortunately, there was a need to make backwards incompatible changes in 2.26. Concretely jersey-proprietary reactive client API is completely gone and cannot be supported any longer - it conflicts with what was introduced in JAX-RS 2.1 (that's the price for Jersey being "spec playground..").

Another bigger change in Jersey code is attempt to make Jersey core independent of any specific injection framework. As you might now, Jersey 2.x is (was!) pretty tightly dependent on HK2, which sometimes causes issues (esp. when running on other injection containers. Jersey now defines it's own injection facade, which, when implemented properly, replaces all internal Jersey injection.

As for now one should use the following dependencies:

Maven

<dependency>
    <groupId>org.glassfish.jersey.inject</groupId>
    <artifactId>jersey-hk2</artifactId>
    <version>2.26</version>
</dependency>

Gradle

compile 'org.glassfish.jersey.core:jersey-common:2.26'
compile 'org.glassfish.jersey.inject:jersey-hk2:2.26'

Does C# support multiple inheritance?

You may want to take your argument a step further and talk about design patterns - and you can find out why he'd want to bother trying to inherit from multiple classes in c# if he even could

How to display all elements in an arraylist?

You can use arraylistname.clone()

How can I run a program from a batch file without leaving the console open after the program starts?

Here is my preferred solution. It is taken from an answer to a similar question.

Use a VBS Script to call the batch file:

Set WshShell = CreateObject("WScript.Shell")
WshShell.Run chr(34) & "C:\path\to\your\batchfile.bat" & Chr(34), 0
Set WshShell = Nothing

Copy the lines above to an editor and save the file with .VBS extension.

TypeScript static classes

You can create a class in Typescript as follows:

export class coordinate {
        static x: number;
        static y: number;
        static gradient() {
            return y/x;
        }
    }

and reference it's properties and methods "without" instantiation so:

coordinate.x = 10;
coordinate.y = 10;
console.log(`x of ${coordinate.x} and y of ${coordinate.y} has gradient of ${coordinate.gradient()}`);

Fyi using backticks `` in conjunction with interpolation syntax ${} allows ease in mixing code with text :-)

CURLOPT_RETURNTRANSFER set to true doesnt work on hosting server

Just try this line:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

after:

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

Plot smooth line with PyPlot

See the scipy.interpolate documentation for some examples.

The following example demonstrates its use, for linear and cubic spline interpolation:

>>> from scipy.interpolate import interp1d

>>> x = np.linspace(0, 10, num=11, endpoint=True)
>>> y = np.cos(-x**2/9.0)
>>> f = interp1d(x, y)
>>> f2 = interp1d(x, y, kind='cubic')

>>> xnew = np.linspace(0, 10, num=41, endpoint=True)
>>> import matplotlib.pyplot as plt
>>> plt.plot(x, y, 'o', xnew, f(xnew), '-', xnew, f2(xnew), '--')
>>> plt.legend(['data', 'linear', 'cubic'], loc='best')
>>> plt.show()

enter image description here

How to get values and keys from HashMap?

for (Map.Entry<String, Tab> entry : hash.entrySet()) {
    String key = entry.getKey();
    Tab tab = entry.getValue();
    // do something with key and/or tab
}

Works like a charm.

Reading specific XML elements from XML file

XDocument xdoc = XDocument.Load(path_to_xml);
var word = xdoc.Elements("word")
               .SingleOrDefault(w => (string)w.Element("category") == "verb");

This query will return whole word XElement. If there is more than one word element with category verb, than you will get an InvalidOperationException. If there is no elements with category verb, result will be null.

How can I display a messagebox in ASP.NET?

The best solution is a minimal use of java directly in the visualstudio GUI

here it is: On a button go to the "OnClientClick" property (its not into events*) overthere type:

return confirm('are you sure?')

it will put a dialog with cancel ok buttons transparent over current page if cancel is pressed no postback will ocure. However if you want only ok button type:

alert ('i told you so')

The events like onclick work server side they execute your code, while OnClientClick runs in the browser side. the come most close to a basic dialog

matplotlib savefig() plots different from show()

I have fixed this in my matplotlib source, but it's not a pretty fix. However, if you, like me, are very particular about how the graph looks, it's worth it.

The issue seems to be in the rendering backends; they each get the correct values for linewidth, font size, etc., but that comes out slightly larger when rendered as a PDF or PNG than when rendered with show().

I added a few lines to the source for PNG generation, in the file matplotlib/backends/backend_agg.py. You could make similar changes for each backend you use, or find a way to make a more clever change in a single location ;)

Added to my matplotlib/backends/backend_agg.py file:

    # The top of the file, added lines 42 - 44
42  # @warning: CHANGED FROM SOURCE to draw thinner lines
43  PATH_SCALAR = .8
44  FONT_SCALAR = .95

    # In the draw_markers method, added lines 90 - 91
89  def draw_markers(self, *kl, **kw):
90      # @warning: CHANGED FROM SOURCE to draw thinner lines
91      kl[0].set_linewidth(kl[0].get_linewidth()*PATH_SCALAR)
92      return self._renderer.draw_markers(*kl, **kw)

    # At the bottom of the draw_path method, added lines 131 - 132:
130 else:
131     # @warning: CHANGED FROM SOURCE to draw thinner lines
132     gc.set_linewidth(gc.get_linewidth()*PATH_SCALAR)
133     self._renderer.draw_path(gc, path, transform, rgbFace)

    # At the bottom of the _get_agg_font method, added line 242 and the *FONT_SCALAR
241     font.clear()
242     # @warning: CHANGED FROM SOURCE to draw thinner lines
243     size = prop.get_size_in_points()*FONT_SCALAR
244     font.set_size(size, self.dpi)

So that suits my needs for now, but, depending on what you're doing, you may want to implement similar changes in other methods. Or find a better way to do the same without so many line changes!

Update: After posting an issue to the matplotlib project at Github, I was able to track down the source of my problem: I had changed the figure.dpi setting in the matplotlibrc file. If that value is different than the default, my savefig() images come out different, even if I set the savefig dpi to be the same as the figure dpi. So, instead of changing the source as above, I just kept the figure.dpi setting as the default 80, and was able to generate images with savefig() that looked like images from show().

Leon, had you also changed that setting?

How to get single value of List<object>

You can access the fields by indexing the object array:

foreach (object[] item in selectedValues)
{
  idTextBox.Text = item[0];
  titleTextBox.Text = item[1];
  contentTextBox.Text = item[2];
}

That said, you'd be better off storing the fields in a small class of your own if the number of items is not dynamic:

public class MyObject
{
    public int Id { get; set; }
    public string Title { get; set; }
    public string Content { get; set; }
}

Then you can do:

foreach (MyObject item in selectedValues)
{
  idTextBox.Text = item.Id;
  titleTextBox.Text = item.Title;
  contentTextBox.Text = item.Content;
}

Validate email address textbox using JavaScript

Are you also validating server-side? This is very important.

Using regular expressions for e-mail isn't considered best practice since it's almost impossible to properly encapsulate all of the standards surrounding email. If you do have to use regular expressions I'll usually go down the route of something like:

^.+@.+$

which basically checks you have a value that contains an @. You would then back that up with verification by sending an e-mail to that address.

Any other kind of regex means you risk turning down completely valid e-mail addresses, other than that I agree with the answer provided by @Ben.

What JSON library to use in Scala?

I use PLAY JSON library you can find the mavn repo for only the JSON library not the whole framework here

    val json = "com.typesafe.play" %% "play-json" % version
    val typesafe = "typesafe.com" at "http://repo.typesafe.com/typesafe/releases/"

A very good tutorials about how to use them, are available here:

http://mandubian.com/2012/09/08/unveiling-play-2-dot-1-json-api-part1-jspath-reads-combinators/

http://mandubian.com/2012/10/01/unveiling-play-2-dot-1-json-api-part2-writes-format-combinators/

http://mandubian.com/2012/10/29/unveiling-play-2-dot-1-json-api-part3-json-transformers/

How to declare a Fixed length Array in TypeScript

The Tuple approach :

This solution provides a strict FixedLengthArray (ak.a. SealedArray) type signature based in Tuples.

Syntax example :

// Array containing 3 strings
let foo : FixedLengthArray<[string, string, string]>

This is the safest approach, considering it prevents accessing indexes out of the boundaries.

Implementation :

type ArrayLengthMutationKeys = 'splice' | 'push' | 'pop' | 'shift' | 'unshift' | number
type ArrayItems<T extends Array<any>> = T extends Array<infer TItems> ? TItems : never
type FixedLengthArray<T extends any[]> =
  Pick<T, Exclude<keyof T, ArrayLengthMutationKeys>>
  & { [Symbol.iterator]: () => IterableIterator< ArrayItems<T> > }

Tests :

var myFixedLengthArray: FixedLengthArray< [string, string, string]>

// Array declaration tests
myFixedLengthArray = [ 'a', 'b', 'c' ]  // ? OK
myFixedLengthArray = [ 'a', 'b', 123 ]  // ? TYPE ERROR
myFixedLengthArray = [ 'a' ]            // ? LENGTH ERROR
myFixedLengthArray = [ 'a', 'b' ]       // ? LENGTH ERROR

// Index assignment tests 
myFixedLengthArray[1] = 'foo'           // ? OK
myFixedLengthArray[1000] = 'foo'        // ? INVALID INDEX ERROR

// Methods that mutate array length
myFixedLengthArray.push('foo')          // ? MISSING METHOD ERROR
myFixedLengthArray.pop()                // ? MISSING METHOD ERROR

// Direct length manipulation
myFixedLengthArray.length = 123         // ? READ-ONLY ERROR

// Destructuring
var [ a ] = myFixedLengthArray          // ? OK
var [ a, b ] = myFixedLengthArray       // ? OK
var [ a, b, c ] = myFixedLengthArray    // ? OK
var [ a, b, c, d ] = myFixedLengthArray // ? INVALID INDEX ERROR

(*) This solution requires the noImplicitAny typescript configuration directive to be enabled in order to work (commonly recommended practice)

The Array(ish) approach :

This solution behaves as an augmentation of the Array type, accepting an additional second parameter(Array length). Is not as strict and safe as the Tuple based solution.

Syntax example :

let foo: FixedLengthArray<string, 3>

Keep in mind that this approach will not prevent you from accessing an index out of the declared boundaries and set a value on it.

Implementation :

type ArrayLengthMutationKeys = 'splice' | 'push' | 'pop' | 'shift' |  'unshift'
type FixedLengthArray<T, L extends number, TObj = [T, ...Array<T>]> =
  Pick<TObj, Exclude<keyof TObj, ArrayLengthMutationKeys>>
  & {
    readonly length: L 
    [ I : number ] : T
    [Symbol.iterator]: () => IterableIterator<T>   
  }

Tests :

var myFixedLengthArray: FixedLengthArray<string,3>

// Array declaration tests
myFixedLengthArray = [ 'a', 'b', 'c' ]  // ? OK
myFixedLengthArray = [ 'a', 'b', 123 ]  // ? TYPE ERROR
myFixedLengthArray = [ 'a' ]            // ? LENGTH ERROR
myFixedLengthArray = [ 'a', 'b' ]       // ? LENGTH ERROR

// Index assignment tests 
myFixedLengthArray[1] = 'foo'           // ? OK
myFixedLengthArray[1000] = 'foo'        // ? SHOULD FAIL

// Methods that mutate array length
myFixedLengthArray.push('foo')          // ? MISSING METHOD ERROR
myFixedLengthArray.pop()                // ? MISSING METHOD ERROR

// Direct length manipulation
myFixedLengthArray.length = 123         // ? READ-ONLY ERROR

// Destructuring
var [ a ] = myFixedLengthArray          // ? OK
var [ a, b ] = myFixedLengthArray       // ? OK
var [ a, b, c ] = myFixedLengthArray    // ? OK
var [ a, b, c, d ] = myFixedLengthArray // ? SHOULD FAIL

getting " (1) no such column: _id10 " error

I think you missed a equal sign at:

Cursor c = ourDatabase.query(DATABASE_TABLE, column, KEY_ROWID + "" + l, null, null, null, null);

Change to:

Cursor c = ourDatabase.query(DATABASE_TABLE, column, KEY_ROWID + " = " + l, null, null, null, null);

Get list of filenames in folder with Javascript

For client side files, you cannot get a list of files in a user's local directory.

If the user has provided uploaded files, you can access them via their input element.

<input type="file" name="client-file" id="get-files" multiple />


<script>
var inp = document.getElementById("get-files");
// Access and handle the files 

for (i = 0; i < inp.files.length; i++) {
    let file = inp.files[i];
    // do things with file
}
</script>

How to obtain the absolute path of a file via Shell (BASH/ZSH/SH)?

This is not an answer to the question, but for those who does scripting:

echo `cd "$1" 2>/dev/null&&pwd||(cd "$(dirname "$1")";pwd|sed "s|/*\$|/${1##*/}|")`

it handles / .. ./ etc correctly. I also seems to work on OSX

omp parallel vs. omp parallel for

Although both versions of the specific example are equivalent, as already mentioned in the other answers, there is still one small difference between them. The first version includes an unnecessary implicit barrier, encountered at the end of the "omp for". The other implicit barrier can be found at the end of the parallel region. Adding "nowait" to "omp for" would make the two codes equivalent, at least from an OpenMP perspective. I mention this because an OpenMP compiler could generate slightly different code for the two cases.

How to create separate AngularJS controller files?

What about this solution? Modules and Controllers in Files (at the end of the page) It works with multiple controllers, directives and so on:

app.js

var app = angular.module("myApp", ['deps']);

myCtrl.js

app.controller("myCtrl", function($scope) { ..});

html

<script src="app.js"></script>
<script src="myCtrl.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">

Google has also a Best Practice Recommendations for Angular App Structure I really like to group by context. Not all the html in one folder, but for example all files for login (html, css, app.js,controller.js and so on). So if I work on a module, all the directives are easier to find.

How does Junit @Rule work?

Rules are used to enhance the behaviour of each test method in a generic way. Junit rule intercept the test method and allows us to do something before a test method starts execution and after a test method has been executed.

For example, Using @Timeout rule we can set the timeout for all the tests.

public class TestApp {
    @Rule
    public Timeout globalTimeout = new Timeout(20, TimeUnit.MILLISECONDS);

    ......
    ......

 }

@TemporaryFolder rule is used to create temporary folders, files. Every time the test method is executed, a temporary folder is created and it gets deleted after the execution of the method.

public class TempFolderTest {

 @Rule
 public TemporaryFolder tempFolder= new TemporaryFolder();

 @Test
 public void testTempFolder() throws IOException {
  File folder = tempFolder.newFolder("demos");
  File file = tempFolder.newFile("Hello.txt");

  assertEquals(folder.getName(), "demos");
  assertEquals(file.getName(), "Hello.txt");

 }


}

You can see examples of some in-built rules provided by junit at this link.

Changing :hover to touch/click for mobile devices

document.addEventListener("touchstart", function() {}, true);

This snippet will enable hover effects for touchscreens

$date + 1 year?

My solution is: date('Y-m-d', time()-60*60*24*365);

You can make it more "readable" with defines:

define('ONE_SECOND', 1);
define('ONE_MINUTE', 60 * ONE_SECOND);
define('ONE_HOUR',   60 * ONE_MINUTE);
define('ONE_DAY',    24 * ONE_HOUR);
define('ONE_YEAR',  365 * ONE_DAY);

date('Y-m-d', time()-ONE_YEAR);

Sum values from an array of key-value pairs in JavaScript

You can use the native map method for Arrays. map Method (Array) (JavaScript)

var myData = new Array(['2013-01-22', 0], ['2013-01-29', 0], ['2013-02-05', 0],
             ['2013-02-12', 0], ['2013-02-19', 0], ['2013-02-26', 0], 
             ['2013-03-05', 0], ['2013-03-12', 0], ['2013-03-19', 0], 
             ['2013-03-26', 0], ['2013-04-02', 21], ['2013-04-09', 2]);
var a = 0;
myData.map( function(aa){ a += aa[1];  return a; });

a is your result

Copy files to network computers on windows command line

Below command will work in command prompt:

copy c:\folder\file.ext \\dest-machine\destfolder /Z /Y

To Copy all files:

copy c:\folder\*.* \\dest-machine\destfolder /Z /Y

How do I include a newline character in a string in Delphi?

On the side, a trick that can be useful:
If you hold your multiple strings in a TStrings, you just have to use the Text property of the TStrings like in the following example.

Label1.Caption := Memo1.Lines.Text;

And you'll get your multi-line label...

Use of def, val, and var in scala

As Kintaro already says, person is a method (because of def) and always returns a new Person instance. As you found out it would work if you change the method to a var or val:

val person = new Person("Kumar",12)

Another possibility would be:

def person = new Person("Kumar",12)
val p = person
p.age=20
println(p.age)

However, person.age=20 in your code is allowed, as you get back a Person instance from the person method, and on this instance you are allowed to change the value of a var. The problem is, that after that line you have no more reference to that instance (as every call to person will produce a new instance).

This is nothing special, you would have exactly the same behavior in Java:

class Person{ 
   public int age; 
   private String name;
   public Person(String name; int age) {
      this.name = name;  
      this.age = age;
   }
   public String name(){ return name; }
}

public Person person() { 
  return new Person("Kumar", 12); 
}

person().age = 20;
System.out.println(person().age); //--> 12

Eclipse - Failed to create the java virtual machine

Change the below parameter in the eclipse.ini (which is in the same directory as eclipse.exe) to match one of your current Java version. Note that I also changed the maximum memory allowed for the eclipse process (which is run in a JVM). If you having multiple Java versions installed this can be happen. The below trick word for me.

-Xmx512m
-Dosgi.requiredJavaVersion=1.6

I changed this to,

-Xmx1024m
-Dosgi.requiredJavaVersion=1.7

Then It worked.

iOS 10: "[App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction"

OS_ACTIVITY_MODE = disable

This will also disable the ability to debug in real devices (no console output from real devices from then on).

Unable to execute dex: Multiple dex files define

If you are using cordova, try cordova clean command

How to run multiple DOS commands in parallel?

if you have multiple parameters use the syntax as below. I have a bat file with script as below:

start "dummyTitle" [/options] D:\path\ProgramName.exe Param1 Param2 Param3 
start "dummyTitle" [/options] D:\path\ProgramName.exe Param4 Param5 Param6

This will open multiple consoles.

jQuery trigger file input

It is too late to answer but I think this minimal setup work best. I am also looking for the same.

  <div class="btn-file">
     <input type="file" class="hidden-input">
     Select your new picture
  </div>

//css

.btn-file {
  display: inline-block;
  padding: 8px 12px;
  cursor: pointer;
  background: #89f;
  color: #345;
  position: relative;
  overflow: hidden;
}

.btn-file input[type=file] {
  position: absolute;
  top: 0;
  right: 0;
  min-width: 100%;
  min-height: 100%;
  filter: alpha(opacity=0);
  opacity: 0;
  cursor: inherit;
  display: block;
}

jsbin

bootstrap file input buttons demo

Eclipse says: “Workspace in use or cannot be created, chose a different one.” How do I unlock a workspace?

I have observed one case when eclipse when in forced quit, or Alt-f2 xkilled in linux, an attempt to immediately open eclipse shows that error. Even the metadat/.lock file is not present in that case. However it starts working after a span of about two minutes

How to reload page the page with pagination in Angular 2?

This should technically be achievable using window.location.reload():

HTML:

<button (click)="refresh()">Refresh</button>

TS:

refresh(): void {
    window.location.reload();
}

Update:

Here is a basic StackBlitz example showing the refresh in action. Notice the URL on "/hello" path is retained when window.location.reload() is executed.

AngularJS - Any way for $http.post to send request parameters instead of JSON?

This might be a bit of a hack, but I avoided the issue and converted the json into PHP's POST array on the server side:

$_POST = json_decode(file_get_contents('php://input'), true);

Remote Procedure call failed with sql server 2008 R2

I just had the same issue and was able to solve it by installing Service Pack 1.

Cycles in family tree software

Another mock serious answer for a silly question:

The real answer is, use an appropriate data structure. Human genealogy cannot fully be expressed using a pure tree with no cycles. You should use some sort of graph. Also, talk to an anthropologist before going any further with this, because there are plenty of other places similar errors could be made trying to model genealogy, even in the most simple case of "Western patriarchal monogamous marriage."

Even if we want to ignore locally taboo relationships as discussed here, there are plenty of perfectly legal and completely unexpected ways to introduce cycles into a family tree.

For example: http://en.wikipedia.org/wiki/Cousin_marriage

Basically, cousin marriage is not only common and expected, it is the reason humans have gone from thousands of small family groups to a worldwide population of 6 billion. It can't work any other way.

There really are very few universals when it comes to genealogy, family and lineage. Almost any strict assumption about norms suggesting who an aunt can be, or who can marry who, or how children are legitimized for the purpose of inheritance, can be upset by some exception somewhere in the world or history.

Efficiently finding the last line in a text file

with open('output.txt', 'r') as f:
    lines = f.read().splitlines()
    last_line = lines[-1]
    print last_line

Mongoose.js: Find user by username LIKE value

Here my code with expressJS:

router.route('/wordslike/:word')
    .get(function(request, response) {
            var word = request.params.word;       
            Word.find({'sentence' : new RegExp(word, 'i')}, function(err, words){
               if (err) {response.send(err);}
               response.json(words);
            });
         });

Mapping many-to-many association table with extra column(s)

As said before, with JPA, in order to have the chance to have extra columns, you need to use two OneToMany associations, instead of a single ManyToMany relationship. You can also add a column with autogenerated values; this way, it can work as the primary key of the table, if useful.

For instance, the implementation code of the extra class should look like that:

@Entity
@Table(name = "USER_SERVICES")
public class UserService{

    // example of auto-generated ID
    @Id
    @Column(name = "USER_SERVICES_ID", nullable = false)
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long userServiceID;



    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "USER_ID")
    private User user;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "SERVICE_ID")
    private Service service;



    // example of extra column
    @Column(name="VISIBILITY")    
    private boolean visibility;



    public long getUserServiceID() {
        return userServiceID;
    }


    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public Service getService() {
        return service;
    }

    public void setService(Service service) {
        this.service = service;
    }

    public boolean getVisibility() {
        return visibility;
    }

    public void setVisibility(boolean visibility) {
        this.visibility = visibility;
    }

}

How to return a list of keys from a Hash Map?

Using map.keySet(), you can get a set of keys. Then convert this set into List by:

List<String> l = new ArrayList<String>(map.keySet());

And then use l.get(int) method to access keys.

PS:- source- Most concise way to convert a Set<String> to a List<String>

Difference between staticmethod and classmethod

The definitive guide on how to use static, class or abstract methods in Python is one good link for this topic, and summary it as following.

@staticmethod function is nothing more than a function defined inside a class. It is callable without instantiating the class first. It’s definition is immutable via inheritance.

Python does not have to instantiate a bound-method for object.
It eases the readability of the code, and it does not depend on the state of object itself;

@classmethod function also callable without instantiating the class, but its definition follows Sub class, not Parent class, via inheritance, can be overridden by subclass. That’s because the first argument for @classmethod function must always be cls (class).

Factory methods, that are used to create an instance for a class using for example some sort of pre-processing.
Static methods calling static methods: if you split a static methods in several static methods, you shouldn't hard-code the class name but use class methods

How to define static constant in a class in swift

If you actually want a static property of your class, that isn't currently supported in Swift. The current advice is to get around that by using global constants:

let testStr = "test"
let testStrLen = countElements(testStr)

class MyClass {
    func myFunc() {
    }
}

If you want these to be instance properties instead, you can use a lazy stored property for the length -- it will only get evaluated the first time it is accessed, so you won't be computing it over and over.

class MyClass {
    let testStr: String = "test"
    lazy var testStrLen: Int = countElements(self.testStr)

    func myFunc() {
    }
}

Remove all files except some from a directory

You can do this with two command sequences. First define an array with the name of the files you do not want to exclude:

files=( backup.tar.gz script.php database.sql info.txt )

After that, loop through all files in the directory you want to exclude, checking if the filename is in the array you don't want to exclude; if its not then delete the file.

for file in *; do
  if [[ ! " ${files[@]} " ~= "$file"  ]];then
    rm "$file"
  fi
done

Java int to String - Integer.toString(i) vs new Integer(i).toString()

Simple way is just concatenate "" with integer:

int i = 100;

String s = "" + i;

now s will have 100 as string value.

Incrementing in C++ - When to use x++ or ++x?

Scott Meyers tells you to prefer prefix except on those occasions where logic would dictate that postfix is appropriate.

"More Effective C++" item #6 - that's sufficient authority for me.

For those who don't own the book, here are the pertinent quotes. From page 32:

From your days as a C programmer, you may recall that the prefix form of the increment operator is sometimes called "increment and fetch", while the postfix form is often known as "fetch and increment." The two phrases are important to remember, because they all but act as formal specifications...

And on page 34:

If you're the kind who worries about efficiency, you probably broke into a sweat when you first saw the postfix increment function. That function has to create a temporary object for its return value and the implementation above also creates an explicit temporary object that has to be constructed and destructed. The prefix increment function has no such temporaries...

Single quotes vs. double quotes in Python

I aim to minimize both pixels and surprise. I typically prefer ' in order to minimize pixels, but " instead if the string has an apostrophe, again to minimize pixels. For a docstring, however, I prefer """ over ''' because the latter is non-standard, uncommon, and therefore surprising. If now I have a bunch of strings where I used " per the above logic, but also one that can get away with a ', I may still use " in it to preserve consistency, only to minimize surprise.

Perhaps it helps to think of the pixel minimization philosophy in the following way. Would you rather that English characters looked like A B C or AA BB CC? The latter choice wastes 50% of the non-empty pixels.

Django ChoiceField

First I recommend you as @ChrisHuang-Leaver suggested to define a new file with all the choices you need it there, like choices.py:

STATUS_CHOICES = (
    (1, _("Not relevant")),
    (2, _("Review")),
    (3, _("Maybe relevant")),
    (4, _("Relevant")),
    (5, _("Leading candidate"))
)
RELEVANCE_CHOICES = (
    (1, _("Unread")),
    (2, _("Read"))
)

Now you need to import them on the models, so the code is easy to understand like this(models.py):

from myApp.choices import * 

class Profile(models.Model):
    user = models.OneToOneField(User)    
    status = models.IntegerField(choices=STATUS_CHOICES, default=1)   
    relevance = models.IntegerField(choices=RELEVANCE_CHOICES, default=1)

And you have to import the choices in the forms.py too:

forms.py:

from myApp.choices import * 

class CViewerForm(forms.Form):

    status = forms.ChoiceField(choices = STATUS_CHOICES, label="", initial='', widget=forms.Select(), required=True)
    relevance = forms.ChoiceField(choices = RELEVANCE_CHOICES, required=True)

Anyway you have an issue with your template, because you're not using any {{form.field}}, you generate a table but there is no inputs only hidden_fields.

When the user is staff you should generate as many input fields as users you can manage. I think django form is not the best solution for your situation.

I think it will be better for you to use html form, so you can generate as many inputs using the boucle: {% for user in users_list %} and you generate input with an ID related to the user, and you can manage all of them in the view.

Get the first item from an iterable that matches a condition

You could also use the argwhere function in Numpy. For example:

i) Find the first "l" in "helloworld":

import numpy as np
l = list("helloworld") # Create list
i = np.argwhere(np.array(l)=="l") # i = array([[2],[3],[8]])
index_of_first = i.min()

ii) Find first random number > 0.1

import numpy as np
r = np.random.rand(50) # Create random numbers
i = np.argwhere(r>0.1)
index_of_first = i.min()

iii) Find the last random number > 0.1

import numpy as np
r = np.random.rand(50) # Create random numbers
i = np.argwhere(r>0.1)
index_of_last = i.max()

How to solve java.lang.NullPointerException error?

Just a shot in the dark(since you did not share the compiler initialization code with us): the way you retrieve the compiler causes the issue. Point your JRE to be inside the JDK as unlike jdk, jre does not provide any tools hence, results in NPE.

How to install mod_ssl for Apache httpd?

Are any other LoadModule commands referencing modules in the /usr/lib/httpd/modules folder? If so, you should be fine just adding LoadModule ssl_module /usr/lib/httpd/modules/mod_ssl.so to your conf file.

Otherwise, you'll want to copy the mod_ssl.so file to whatever directory the other modules are being loaded from and reference it there.

Convert varchar to float IF ISNUMERIC

-- TRY THIS --

select name= case when isnumeric(empname)= 1 then 'numeric' else 'notmumeric' end from [Employees]

But conversion is quit impossible

select empname=
case
when isnumeric(empname)= 1 then empname
else 'notmumeric'
end
from [Employees]

How to index into a dictionary?

If you need an ordered dictionary, you can use odict.

Setting default value for TypeScript object passed as argument

This can be a nice way to do it that does not involve long constructors

class Person {
    firstName?: string = 'Bob';
    lastName?: string = 'Smith';

    // Pass in this class as the required params
    constructor(params: Person) {
        // object.assign will overwrite defaults if params exist
        Object.assign(this, params)
    }
}

// you can still use the typing 
function sayName(params: Person){ 
    let name = params.firstName + params.lastName
    alert(name)
}

// you do have to call new but for my use case this felt better
sayName(new Person({firstName: 'Gordon'}))
sayName(new Person({lastName: 'Thomas'}))

create table with sequence.nextval in oracle

In Oracle 12c you can also declare an identity column

CREATE TABLE identity_test_tab (
  id          NUMBER GENERATED BY DEFAULT ON NULL AS IDENTITY,
  description VARCHAR2(30)
);

examples & performance tests here ... where, is shorts, the conclusion is that the direct use of the sequence or the new identity column are much faster than the triggers.

How to use css style in php

Just put the CSS outside the PHP Tag. Here:

<html>
<head>
    <title>Title</title>
    <style type="text/css">
    table {
        margin: 8px;
    }
    </style>
</head>
<body>
    <table>
    <tr><th>ID</th><th>hashtag</th></tr>
    <?php
    while($row = mysql_fetch_row($result))
    {
        echo "<tr onmouseover=\"hilite(this)\" onmouseout=\"lowlite(this)\"><td>$row[0]</td>                <td>$row[1]</td></tr>\n";
    }
    ?>
    </table>
</body>
</html>

Take note that the PHP tags are <?php and ?>.

Why is my CSS bundling not working with a bin deployed MVC4 app?

UPDATE 11/4/2013:

The reason why this happens is because you have .js or .css at the end of your bundle name which causes ASP.NET to not run the request through MVC and the BundleModule.

The recommended way to fix this for better performance is to remove the .js or .css from your bundle name.

So /bundle/myscripts.js becomes /bundle/myscripts

Alternatively you can modify your web.config in the system.webServer section to run these requests through the BundleModule (which was my original answer)

<modules runAllManagedModulesForAllRequests="true">
  <remove name="BundleModule" />
  <add name="BundleModule" type="System.Web.Optimization.BundleModule" />
</modules>

Edit: I also noticed that if the name ends with 'css' (without the dot), that is a problem as well. I had to change my bundle name from 'DataTablesCSS' to 'DataTablesStyles' to fix my issue.

How do I get a reference to the app delegate in Swift?

In my case, I was missing import UIKit on top of my NSManagedObject subclass. After importing it, I could remove that error as UIApplication is the part of UIKit

Hope it helps others !!!

How do I prevent an Android device from going to sleep programmatically?

One option is to use a wake lock. Example from the docs:

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
wl.acquire();

// screen and CPU will stay awake during this section

wl.release();

There's also a table on this page that describes the different kinds of wakelocks.

Be aware that some caution needs to be taken when using wake locks. Ensure that you always release() the lock when you're done with it (or not in the foreground). Otherwise your app can potentially cause some serious battery drain and CPU usage.

The documentation also contains a useful page that describes different approaches to keeping a device awake, and when you might choose to use one. If "prevent device from going to sleep" only refers to the screen (and not keeping the CPU active) then a wake lock is probably more than you need.

You also need to be sure you have the WAKE_LOCK permission set in your manifest in order to use this method.

How do I append to a table in Lua

foo = {}
foo[#foo+1]="bar"
foo[#foo+1]="baz"

This works because the # operator computes the length of the list. The empty list has length 0, etc.

If you're using Lua 5.3+, then you can do almost exactly what you wanted:

foo = {}
setmetatable(foo, { __shl = function (t,v) t[#t+1]=v end })
_= foo << "bar"
_= foo << "baz"

Expressions are not statements in Lua and they need to be used somehow.

What does on_delete do on Django models?

Reorient your mental model of the functionality of "CASCADE" by thinking of adding a FK to an already existing cascade (i.e. a waterfall). The source of this waterfall is a primary key (PK). Deletes flow down.

So if you define a FK's on_delete as "CASCADE," you're adding this FK's record to a cascade of deletes originating from the PK. The FK's record may participate in this cascade or not ("SET_NULL"). In fact, a record with a FK may even prevent the flow of the deletes! Build a dam with "PROTECT."

stringstream, string, and char* conversion confusion

The std::string object returned by ss.str() is a temporary object that will have a life time limited to the expression. So you cannot assign a pointer to a temporary object without getting trash.

Now, there is one exception: if you use a const reference to get the temporary object, it is legal to use it for a wider life time. For example you should do:

#include <string>
#include <sstream>
#include <iostream>

using namespace std;

int main()
{
    stringstream ss("this is a string\n");

    string str(ss.str());

    const char* cstr1 = str.c_str();

    const std::string& resultstr = ss.str();
    const char* cstr2 = resultstr.c_str();

    cout << cstr1       // Prints correctly
        << cstr2;       // No more error : cstr2 points to resultstr memory that is still alive as we used the const reference to keep it for a time.

    system("PAUSE");

    return 0;
}

That way you get the string for a longer time.

Now, you have to know that there is a kind of optimisation called RVO that say that if the compiler see an initialization via a function call and that function return a temporary, it will not do the copy but just make the assigned value be the temporary. That way you don't need to actually use a reference, it's only if you want to be sure that it will not copy that it's necessary. So doing:

 std::string resultstr = ss.str();
 const char* cstr2 = resultstr.c_str();

would be better and simpler.

Best way to deploy Visual Studio application that can run without installing

First you need to publish the file by:

BUILD -> PUBLISH or by right clicking project on Solution Explorer -> properties -> publish or select project in Solution Explorer and press Alt + Enter NOTE: if you are using Visual Studio 2013 then in properties you have to go to BUILD and then you have to disable define DEBUG constant and define TRACE constant and you are ready to go.
Save your file to a particular folder. Find the produced files (the EXE file and the .config, .manifest, and .application files, along with any DLL files, etc.) - they are all in the same folder and typically in the bin\Debug folder below the project file (.csproj). In Visual Studio they are in the Application Files folder and inside that you just need the .exe and dll files. (You have to delete ClickOnce and other files and then make this folder a zip file and distribute it.)

NOTE: The ClickOnce application does install the project to system, but it has one advantage. You DO NOT require administrative privileges here to run (if your application follows the normal guidelines for which folders to use for application data, etc.).

What is the difference between Tomcat, JBoss and Glassfish?

It seems a bit discouraging to use Tomcat when you read these answers. However what most fail to mention is that you can get to identical or almost identical use cases with tomcat but that requires you to add the libraries needed (through Maven or whatever include system you use).

I have been running tomcat with JPA, EJBs with very small configuration efforts.

Sorting A ListView By Column

You can use a manual sorting algorithm like this

public void ListItemSorter(object sender, ColumnClickEventArgs e)
    {
        ListView list = (ListView)sender;
        int total = list.Items.Count;
        list.BeginUpdate();
        ListViewItem[] items = new ListViewItem[total];
        for (int i = 0; i < total; i++)
        {
            int count = list.Items.Count;
            int minIdx = 0;
            for (int j = 1; j < count; j++)
                if (list.Items[j].SubItems[e.Column].Text.CompareTo(list.Items[minIdx].SubItems[e.Column].Text) < 0)
                    minIdx = j;
            items[i] = list.Items[minIdx];
            list.Items.RemoveAt(minIdx);
        }
        list.Items.AddRange(items);
        list.EndUpdate();
    }

this method uses selection sort in O^2 order and as Ascending. You can change the '>' with '<' for a descending or add an argument for this method. It sorts any column that is clicked and works perfect for small amount of data.

"npm config set registry https://registry.npmjs.org/" is not working in windows bat file

You might not be able to change npm registry using .bat file as Gntem pointed out. But I understand that you need the ability to automate changing registries. You can do so by having your .npmrc configs in separate files (say npmrc_jfrog & npmrc_default) and have your .bat files do the copying task.

For example (in Windows): Your default_registry.bat will have

xcopy /y npmrc_default .npmrc

and your jfrog_registry.bat will have

xcopy /y npmrc_jfrog .npmrc

Note: /y suppresses prompting to confirm that you want to overwrite an existing destination file.

This will make sure that all the config properties (registry, proxy, apiKeys, etc.) get copied over to .npmrc.

You can read more about xcopy here.

Algorithm for solving Sudoku

a short attempt to achieve same algorithm using backtracking:

def solve(sudoku):
    #using recursion and backtracking, here we go.
    empties = [(i,j) for i in range(9) for j in range(9) if sudoku[i][j] == 0]
    predict = lambda i, j: set(range(1,10))-set([sudoku[i][j]])-set([sudoku[y+range(1,10,3)[i//3]][x+range(1,10,3)[j//3]] for y in (-1,0,1) for x in (-1,0,1)])-set(sudoku[i])-set(list(zip(*sudoku))[j])
    if len(empties)==0:return True
    gap = next(iter(empties))
    predictions = predict(*gap)
    for i in predictions:
        sudoku[gap[0]][gap[1]] = i
        if solve(sudoku):return True
        sudoku[gap[0]][gap[1]] = 0
    return False

Git, fatal: The remote end hung up unexpectedly

my issue (fatal: The remote end hung up unexpectedly) has been resolved by checking repository permission and owner.

git repository files owner must be that user you want push/pull/clone with it.

convert streamed buffers to utf8-string

var fs = require("fs");

function readFileLineByLine(filename, processline) {
    var stream = fs.createReadStream(filename);
    var s = "";
    stream.on("data", function(data) {
        s += data.toString('utf8');
        var lines = s.split("\n");
        for (var i = 0; i < lines.length - 1; i++)
            processline(lines[i]);
        s = lines[lines.length - 1];
    });

    stream.on("end",function() {
        var lines = s.split("\n");
        for (var i = 0; i < lines.length; i++)
            processline(lines[i]);
    });
}

var linenumber = 0;
readFileLineByLine(filename, function(line) {
    console.log(++linenumber + " -- " + line);
});

How can I create a simple message box in Python?

Have you looked at easygui?

import easygui

easygui.msgbox("This is a message!", title="simple gui")

Convert Year/Month/Day to Day of Year in Python

If you have reason to avoid the use of the datetime module, then these functions will work.

def is_leap_year(year):
    """ if year is a leap year return True
        else return False """
    if year % 100 == 0:
        return year % 400 == 0
    return year % 4 == 0

def doy(Y,M,D):
    """ given year, month, day return day of year
        Astronomical Algorithms, Jean Meeus, 2d ed, 1998, chap 7 """
    if is_leap_year(Y):
        K = 1
    else:
        K = 2
    N = int((275 * M) / 9.0) - K * int((M + 9) / 12.0) + D - 30
    return N

def ymd(Y,N):
    """ given year = Y and day of year = N, return year, month, day
        Astronomical Algorithms, Jean Meeus, 2d ed, 1998, chap 7 """    
    if is_leap_year(Y):
        K = 1
    else:
        K = 2
    M = int((9 * (K + N)) / 275.0 + 0.98)
    if N < 32:
        M = 1
    D = N - int((275 * M) / 9.0) + K * int((M + 9) / 12.0) + 30
    return Y, M, D

Sql Server string to date conversion

SQL Server (2005, 2000, 7.0) does not have any flexible, or even non-flexible, way of taking an arbitrarily structured datetime in string format and converting it to the datetime data type.

By "arbitrarily", I mean "a form that the person who wrote it, though perhaps not you or I or someone on the other side of the planet, would consider to be intuitive and completely obvious." Frankly, I'm not sure there is any such algorithm.

Java: Replace all ' in a string with \'

Let's take a tour of String#repalceAll(String regex, String replacement)

You will see that:

An invocation of this method of the form str.replaceAll(regex, repl) yields exactly the same result as the expression

Pattern.compile(regex).matcher(str).replaceAll(repl)

So lets take a look at Matcher.html#replaceAll(java.lang.String) documentation

Note that backslashes (\) and dollar signs ($) in the replacement string may cause the results to be different than if it were being treated as a literal replacement string. Dollar signs may be treated as references to captured subsequences as described above, and backslashes are used to escape literal characters in the replacement string.

You can see that in replacement we have special character $ which can be used as reference to captured group like

System.out.println("aHellob,aWorldb".replaceAll("a(\\w+?)b", "$1"));
// result Hello,World

But sometimes we don't want $ to be such special because we want to use it as simple dollar character, so we need a way to escape it.
And here comes \, because since it is used to escape metacharacters in regex, Strings and probably in other places it is good convention to use it here to escape $.

So now \ is also metacharacter in replacing part, so if you want to make it simple \ literal in replacement you need to escape it somehow. And guess what? You escape it the same way as you escape it in regex or String. You just need to place another \ before one you escaping.

So if you want to create \ in replacement part you need to add another \ before it. But remember that to write \ literal in String you need to write it as "\\" so to create two \\ in replacement you need to write it as "\\\\".

So try

s = s.replaceAll("'", "\\\\'");

Or even better

to reduce explicit escaping in replacement part (and also in regex part - forgot to mentioned that earlier) just use replace instead replaceAll which adds regex escaping for us

s = s.replace("'", "\\'");

Chrome - ERR_CACHE_MISS

Yes, this is a current issue in Chrome. There is an issue report here.

The fix will appear in 40.x.y.z versions.

Until then? I don't think you can resolve the issue yourself. But you can ignore it. The shown error is only related to the dev tools and does not influence the behavior of your website. If you have any other problems they are not related to this error.

Java String encoding (UTF-8)

How is this different from the following?

This line of code here:

String newString = new String(oldString.getBytes("UTF-8"), "UTF-8"));

constructs a new String object (i.e. a copy of oldString), while this line of code:

String newString = oldString;

declares a new variable of type java.lang.String and initializes it to refer to the same String object as the variable oldString.

Is there any scenario in which the two lines will have different outputs?

Absolutely:

String newString = oldString;
boolean isSameInstance = newString == oldString; // isSameInstance == true

vs.

String newString = new String(oldString.getBytes("UTF-8"), "UTF-8"));
 // isSameInstance == false (in most cases)    
boolean isSameInstance = newString == oldString;

a_horse_with_no_name (see comment) is right of course. The equivalent of

String newString = new String(oldString.getBytes("UTF-8"), "UTF-8"));

String newString = new String(oldString);

minus the subtle difference wrt the encoding that Peter Lawrey explains in his answer.

What is the difference between procedural programming and functional programming?

A functional programming is identical to procedural programming in which global variables are not being used.

How do you round a number to two decimal places in C#?

This is for rounding to 2 decimal places in C#:

label8.Text = valor_cuota .ToString("N2") ;

In VB.NET:

 Imports System.Math
 round(label8.text,2)

Flask Python Buttons

I think this solution is good:

@app.route('/contact', methods=['GET', 'POST'])
def contact():
    form = ContactForm()
    if form.validate_on_submit():
        if form.submit.data:
            pass
        elif form.submit2.data:
            pass
    return render_template('contact.html', form=form)

Form:

class ContactForm(FlaskForm):

    submit = SubmitField('Do this')
    submit2 = SubmitField('Do that')

"Too many characters in character literal error"

You cannot treat == or || as chars, since they are not chars, but a sequence of chars.

You could make your switch...case work on strings instead.

Proper way to concatenate variable strings

Since strings are lists of characters in Python, we can concatenate strings the same way we concatenate lists (with the + sign):

{{ var1 + '-' + var2 + '-' + var3 }}

If you want to pipe the resulting string to some filter, make sure you enclose the bits in parentheses:

e.g. To concatenate our 3 vars, and get a sha512 hash:

{{ (var1 + var2 + var3) | hash('sha512') }}

Note: this works on Ansible 2.3. I haven't tested it on earlier versions.

Fancybox doesn't work with jQuery v1.9.0 [ f.browser is undefined / Cannot read property 'msie' ]

Global events are also deprecated.

Here's a patch, which fixes the browser and event issues:

--- jquery.fancybox-1.3.4.js.orig   2010-11-11 23:31:54.000000000 +0100
+++ jquery.fancybox-1.3.4.js    2013-03-22 23:25:29.996796800 +0100
@@ -26,7 +26,9 @@

        titleHeight = 0, titleStr = '', start_pos, final_pos, busy = false, fx = $.extend($('<div/>')[0], { prop: 0 }),

-       isIE6 = $.browser.msie && $.browser.version < 7 && !window.XMLHttpRequest,
+       isIE = !+"\v1",
+       
+       isIE6 = isIE && window.XMLHttpRequest === undefined,

        /*
         * Private methods 
@@ -322,7 +324,7 @@
            loading.hide();

            if (wrap.is(":visible") && false === currentOpts.onCleanup(currentArray, currentIndex, currentOpts)) {
-               $.event.trigger('fancybox-cancel');
+               $('.fancybox-inline-tmp').trigger('fancybox-cancel');

                busy = false;
                return;
@@ -389,7 +391,7 @@
                        content.html( tmp.contents() ).fadeTo(currentOpts.changeFade, 1, _finish);
                    };

-                   $.event.trigger('fancybox-change');
+                   $('.fancybox-inline-tmp').trigger('fancybox-change');

                    content
                        .empty()
@@ -612,7 +614,7 @@
            }

            if (currentOpts.type == 'iframe') {
-               $('<iframe id="fancybox-frame" name="fancybox-frame' + new Date().getTime() + '" frameborder="0" hspace="0" ' + ($.browser.msie ? 'allowtransparency="true""' : '') + ' scrolling="' + selectedOpts.scrolling + '" src="' + currentOpts.href + '"></iframe>').appendTo(content);
+               $('<iframe id="fancybox-frame" name="fancybox-frame' + new Date().getTime() + '" frameborder="0" hspace="0" ' + (isIE ? 'allowtransparency="true""' : '') + ' scrolling="' + selectedOpts.scrolling + '" src="' + currentOpts.href + '"></iframe>').appendTo(content);
            }

            wrap.show();
@@ -912,7 +914,7 @@

        busy = true;

-       $.event.trigger('fancybox-cancel');
+       $('.fancybox-inline-tmp').trigger('fancybox-cancel');

        _abort();

@@ -957,7 +959,7 @@
            title.empty().hide();
            wrap.hide();

-           $.event.trigger('fancybox-cleanup');
+           $('.fancybox-inline-tmp, select:not(#fancybox-tmp select)').trigger('fancybox-cleanup');

            content.empty();

Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a const function?

One of the best example where we use mutable is, in deep copy. in copy constructor we send const &obj as argument. So the new object created will be of constant type. If we want to change (mostly we won't change, in rare case we may change) the members in this newly created const object we need to declare it as mutable.

mutable storage class can be used only on non static non const data member of a class. Mutable data member of a class can be modified even if it's part of an object which is declared as const.

class Test
{
public:
    Test(): x(1), y(1) {};
    mutable int x;
    int y;
};

int main()
{
    const Test object;
    object.x = 123;
    //object.y = 123;
    /* 
    * The above line if uncommented, will create compilation error.
    */   

    cout<< "X:"<< object.x << ", Y:" << object.y;
    return 0;
}

Output:-
X:123, Y:1

In the above example, we are able to change the value of member variable x though it's part of an object which is declared as const. This is because the variable x is declared as mutable. But if you try to modify the value of member variable y, compiler will throw an error.

String comparison in Python: is vs. ==

For all built-in Python objects (like strings, lists, dicts, functions, etc.), if x is y, then x==y is also True.

Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can have the same value.

Also, is it generally considered better to just use '==' by default, even when comparing int or Boolean values?

You use == when comparing values and is when comparing identities.

When comparing ints (or immutable types in general), you pretty much always want the former. There's an optimization that allows small integers to be compared with is, but don't rely on it.

For boolean values, you shouldn't be doing comparisons at all. Instead of:

if x == True:
    # do something

write:

if x:
    # do something

For comparing against None, is None is preferred over == None.

I've always liked to use 'is' because I find it more aesthetically pleasing and pythonic (which is how I fell into this trap...), but I wonder if it's intended to just be reserved for when you care about finding two objects with the same id.

Yes, that's exactly what it's for.

How to find the Center Coordinate of Rectangle?

We can calculate using mid point of line formula,

centre (x,y) =  new Point((boundRect.tl().x+boundRect.br().x)/2,(boundRect.tl().y+boundRect.br().y)/2)

Input mask for numeric and decimal

or also

<input type="text" onkeypress="handleNumber(event, '€ {-10,3} $')" placeholder="€  $" size=25>

with

function handleNumber(event, mask) {
    /* numeric mask with pre, post, minus sign, dots and comma as decimal separator
        {}: positive integer
        {10}: positive integer max 10 digit
        {,3}: positive float max 3 decimal
        {10,3}: positive float max 7 digit and 3 decimal
        {null,null}: positive integer
        {10,null}: positive integer max 10 digit
        {null,3}: positive float max 3 decimal
        {-}: positive or negative integer
        {-10}: positive or negative integer max 10 digit
        {-,3}: positive or negative float max 3 decimal
        {-10,3}: positive or negative float max 7 digit and 3 decimal
    */
    with (event) {
        stopPropagation()
        preventDefault()
        if (!charCode) return
        var c = String.fromCharCode(charCode)
        if (c.match(/[^-\d,]/)) return
        with (target) {
            var txt = value.substring(0, selectionStart) + c + value.substr(selectionEnd)
            var pos = selectionStart + 1
        }
    }
    var dot = count(txt, /\./, pos)
    txt = txt.replace(/[^-\d,]/g,'')

    var mask = mask.match(/^(\D*)\{(-)?(\d*|null)?(?:,(\d+|null))?\}(\D*)$/); if (!mask) return // meglio exception?
    var sign = !!mask[2], decimals = +mask[4], integers = Math.max(0, +mask[3] - (decimals || 0))
    if (!txt.match('^' + (!sign?'':'-?') + '\\d*' + (!decimals?'':'(,\\d*)?') + '$')) return

    txt = txt.split(',')
    if (integers && txt[0] && count(txt[0],/\d/) > integers) return
    if (decimals && txt[1] && txt[1].length > decimals) return
    txt[0] = txt[0].replace(/\B(?=(\d{3})+(?!\d))/g, '.')

    with (event.target) {
        value = mask[1] + txt.join(',') + mask[5]
        selectionStart = selectionEnd = pos + (pos==1 ? mask[1].length : count(value, /\./, pos) - dot) 
    }

    function count(str, c, e) {
        e = e || str.length
        for (var n=0, i=0; i<e; i+=1) if (str.charAt(i).match(c)) n+=1
        return n
    }
}

How to improve performance of ngRepeat over a huge dataset (angular.js)?

I recommend to see this:

http://blog.scalyr.com/2013/10/angularjs-1200ms-to-35ms/

Optimizing AngularJS: 1200ms to 35ms

they made a new directive by optimizing ng-repeat at 4 parts:

Optimization#1: Cache DOM elements

Optimization#2: Aggregate watchers

Optimization#3: Defer element creation

Optimization#4: Bypass watchers for hidden elements

the project is here on github:

https://github.com/scalyr/angular

Usage:

1- include these files in your single-page app:

core.js
scalyr.js
slyEvaluate.js
slyRepeat.js

2- add module dependency:

var app = angular.module("app", ['sly']);

3- replace ng-repeat

<tr sly-repeat="m in rows"> .....<tr>

ENjoY!

Find Number of CPUs and Cores per CPU using Command Prompt

You can also enter msinfo32 into the command line.

It will bring up all your system information. Then, in the find box, just enter processor and it will show you your cores and logical processors for each CPU. I found this way to be easiest.

How would I check a string for a certain letter in Python?

Use the in keyword without is.

if "x" in dog:
    print "Yes!"

If you'd like to check for the non-existence of a character, use not in:

if "x" not in dog:
    print "No!"

How to merge 2 List<T> and removing duplicate values from it in C#

    List<int> first_list = new List<int>() {
        1,
        12,
        12,
        5
    };

    List<int> second_list = new List<int>() {
        12,
        5,
        7,
        9,
        1
    };

    var result = first_list.Union(second_list);

Use jQuery to navigate away from page

window.location.href = "/somewhere/else";

Why won't bundler install JSON gem?

So after a half day on this and almost immediately after posting my question I found the answer. Bundler 1.5.0 has a bug where it doesn't recognize default gems as referenced here

The solution was to update to bundler 1.5.1 using gem install bundler -v '= 1.5.1'

When should we use intern method of String on String literals

Java automatically interns String literals. This means that in many cases, the == operator appears to work for Strings in the same way that it does for ints or other primitive values.

Since interning is automatic for String literals, the intern() method is to be used on Strings constructed with new String()

Using your example:

String s1 = "Rakesh";
String s2 = "Rakesh";
String s3 = "Rakesh".intern();
String s4 = new String("Rakesh");
String s5 = new String("Rakesh").intern();

if ( s1 == s2 ){
    System.out.println("s1 and s2 are same");  // 1.
}

if ( s1 == s3 ){
    System.out.println("s1 and s3 are same" );  // 2.
}

if ( s1 == s4 ){
    System.out.println("s1 and s4 are same" );  // 3.
}

if ( s1 == s5 ){
    System.out.println("s1 and s5 are same" );  // 4.
}

will return:

s1 and s2 are same
s1 and s3 are same
s1 and s5 are same

In all the cases besides of s4 variable, a value for which was explicitly created using new operator and where intern method was not used on it's result, it is a single immutable instance that's being returned JVM's string constant pool.

Refer to JavaTechniques "String Equality and Interning" for more information.

Java: get greatest common divisor

Or the Euclidean algorithm for calculating the GCD...

public int egcd(int a, int b) {
    if (a == 0)
        return b;

    while (b != 0) {
        if (a > b)
            a = a - b;
        else
            b = b - a;
    }

    return a;
}

How to asynchronously call a method in Java

You can use AsyncFunc from Cactoos:

boolean matches = new AsyncFunc(
  x -> x.matches("something")
).apply("The text").get();

It will be executed at the background and the result will be available in get() as a Future.

Programs & Examples On #Actionresult

return error message with actionResult

In MVC, how do I return a string result?

Change Bootstrap input focus blue glow

What is the apply function in Scala?

How do I add an existing directory tree to a project in Visual Studio?

Oracle PL/SQL - Raise User-Defined Exception With Custom SQLERRM

How to check if JavaScript object is JSON

angularjs getting previous route path

Cast Double to Integer in Java

Change the Arrow buttons in Slick slider

Using Cygwin to Compile a C program; Execution error

Cell spacing in UICollectionView

CSS selector for "foo that contains bar"?

Get content of a DIV using JavaScript

How to choose an AWS profile when using boto3 to connect to CloudFront

Removing array item by value

Huge performance difference when using group by vs distinct

How to make URL/Phone-clickable UILabel?

SQL Server - Create a copy of a database table and place it in the same database?

Read XML file into XmlDocument

Android webview slow

How to implement my very own URI scheme on Android

ORA-00907: missing right parenthesis

delete_all vs destroy_all?

How to convert date to timestamp?

Settings to Windows Firewall to allow Docker for Windows to share drive

You need to use a Theme.AppCompat theme (or descendant) with this activity

Using setDate in PreparedStatement

❐ Using java.sql.Date

❐ Using java.sql.Timestamp

What is trunk, branch and tag in Subversion?

How do I export a project in the Android studio?

What are all the common ways to read a file in Ruby?

npm not working - "read ECONNRESET"

How can you represent inheritance in a database?

"Cannot allocate an object of abstract type" error

PHP Checking if the current date is before or after a set date

Updating a java map entry

Disable Rails SQL logging in console

How do I empty an array in JavaScript?

jQuery to remove an option from drop down list, given option's text/value

Oracle Partition - Error ORA14400 - inserted partition key does not map to any partition

Angular 1 - get current URL parameters

Automatically get loop index in foreach loop in Perl

How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?

Numpy: Creating a complex array from 2 real ones?

Flask Error: "Method Not Allowed The method is not allowed for the requested URL"

Using CSS to insert text

Difference between Build Solution, Rebuild Solution, and Clean Solution in Visual Studio?

Shell script to send email

HTML Input - already filled in text

How to get row data by clicking a button in a row in an ASP.NET gridview

WooCommerce - get category for product page

Boolean.parseBoolean("1") = false...?

Use Expect in a Bash script to provide a password to an SSH command

List attributes of an object

How can I send an xml body using requests library?

How to uninstall Anaconda completely from macOS

Reading tab-delimited file with Pandas - works on Windows, but not on Mac

Duplicate / Copy records in the same MySQL table

How to convert FormData (HTML5 object) to JSON

How do I get Bin Path?

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