Resize external website content to fit iFrame width

Tip for 1 website resizing the height. But you can change to 2 websites.

Here is my code to resize an iframe with an external website. You need insert a code into the parent (with iframe code) page and in the external website as well, so, this won't work with you don't have access to edit the external website.

local (iframe) page: just insert a code snippet
remote (external) page: you need a "body onload" and a "div" that holds all contents. And body needs to be styled to "margin:0"

Local:

<IFRAME STYLE="width:100%;height:1px" SRC="http://www.remote-site.com/" FRAMEBORDER="no" BORDER="0" SCROLLING="no" ID="estframe"></IFRAME>

<SCRIPT>
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var eventer = window[eventMethod];
var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";
eventer(messageEvent,function(e) {
  if (e.data.substring(0,3)=='frm') document.getElementById('estframe').style.height = e.data.substring(3) + 'px';
},false);
</SCRIPT>

You need this "frm" prefix to avoid problems with other embeded codes like Twitter or Facebook plugins. If you have a plain page, you can remove the "if" and the "frm" prefix on both pages (script and onload).

Remote:

You need jQuery to accomplish about "real" page height. I cannot realize how to do with pure JavaScript since you'll have problem when resize the height down (higher to lower height) using body.scrollHeight or related. For some reason, it will return always the biggest height (pre-redimensioned).

<BODY onload="parent.postMessage('frm'+$('#master').height(),'*')" STYLE="margin:0">
<SCRIPT SRC="path-to-jquery/jquery.min.js"></SCRIPT>
<DIV ID="master">
your content
</DIV>

So, parent page (iframe) has a 1px default height. The script inserts a "wait for message/event" from the iframe. When a message (post message) is received and the first 3 chars are "frm" (to avoid the mentioned problem), will get the number from 4th position and set the iframe height (style), including 'px' unit.

The external site (loaded in the iframe) will "send a message" to the parent (opener) with the "frm" and the height of the main div (in this case id "master"). The "*" in postmessage means "any source".

Hope this helps. Sorry for my english.

React component not re-rendering on state change

In my case, I was calling this.setState({}) correctly, but I my function wasn't bound to this, so it wasn't working. Adding .bind(this) to the function call or doing this.foo = this.foo.bind(this) in the constructor fixed it.

How to get subarray from array?

Take a look at Array.slice(begin, end)

_x000D_

const ar  = [1, 2, 3, 4, 5];

// slice from 1..3 - add 1 as the end index is not included

const ar2 = ar.slice(1, 3 + 1);

console.log(ar2);

_x000D_

How do I create a sequence in MySQL?

SEQUENCES like it works on firebird:

-- =======================================================

CREATE TABLE SEQUENCES  
(  
  NM_SEQUENCE VARCHAR(32) NOT NULL UNIQUE,  
  VR_SEQUENCE BIGINT      NOT NULL  
);

-- =======================================================
-- Creates a sequence sSeqName and set its initial value.
-- =======================================================

DROP PROCEDURE IF EXISTS CreateSequence;  

DELIMITER :)  
CREATE PROCEDURE CreateSequence( sSeqName VARCHAR(32), iSeqValue BIGINT )  
BEGIN  
  IF NOT EXISTS ( SELECT * FROM SEQUENCES WHERE (NM_SEQUENCE = sSeqName) ) THEN  
    INSERT INTO SEQUENCES (NM_SEQUENCE, VR_SEQUENCE)  
    VALUES (sSeqName   , iSeqValue  );  
  END IF;  
END :)  
DELIMITER ;  

-- CALL CreateSequence( 'MySequence', 0 );

-- =======================================================================
-- Increments the sequence value of sSeqName by iIncrement and returns it.
-- If iIncrement is zero, returns the current value of sSeqName.
-- =======================================================================

DROP FUNCTION IF EXISTS GetSequenceVal;  

DELIMITER :)  
CREATE FUNCTION GetSequenceVal( sSeqName VARCHAR(32), iIncrement INTEGER )  
RETURNS BIGINT  -- iIncrement can be negative  
BEGIN  
  DECLARE iSeqValue BIGINT;  

  SELECT VR_SEQUENCE FROM SEQUENCES  
  WHERE  ( NM_SEQUENCE = sSeqName )  
  INTO   @iSeqValue;  

  IF ( iIncrement <> 0 ) THEN  
    SET @iSeqValue = @iSeqValue + iIncrement;  

    UPDATE SEQUENCES SET VR_SEQUENCE = @iSeqValue  
    WHERE  ( NM_SEQUENCE = sSeqName );  
  END IF;

  RETURN @iSeqValue;
END :)  
DELIMITER ;  

-- SELECT GetSequenceVal('MySequence', 1);  -- Adds 1 to MySequence value and returns it.

-- ===================================================================

How to resize a custom view programmatically?

If you have only two or three condition(sizes) then you can use @Overide onMeasure like

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) 
{
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

And change your size for these conditions in CustomView class easily.

Where is Xcode's build folder?

It should by located in: ~/Library/Developer/Xcode/DerivedData.

If you changed the defaults, you can see where the build directory is by going to File->Workspace Settings then look at Build Location

How to draw checkbox or tick mark in GitHub Markdown table?

Unfortunately, the accepted answer doesn't work for me (I'm using GitHub flavoured markdown).

It occurs to me since we're adding HTML elements, why not just add an <input> instead.

| demo                                              | demo |
| ------------------------------------------------- | ---- |
| <input type="checkbox" disabled checked /> works  |      |
| <input type="checkbox" disabled /> works here too |      |

This should work in any environment cuz it's plain HTML (see FYI below).

FYI, this example was tested in VS Code markdown preview mode(GitHub flavoured), the screenshot is also taken in VS Code preview mode, It's not exactly working on GitHub.

Emoji mentioned above is a good alternative, if this doesn't work in your target environment.

bash string equality

There's no difference, == is a synonym for = (for the C/C++ people, I assume). See here, for example.

You could double-check just to be really sure or just for your interest by looking at the bash source code, should be somewhere in the parsing code there, but I couldn't find it straightaway.

css divide width 100% to 3 column

A perfect 1/3 cannot exist in CSS with full cross browser support (anything below IE9). I personally would do: (It's not the perfect solution, but it's about as good as you'll get for all browsers)

#c1, #c2 {
    width: 33%;
}

#c3 {
    width: auto;
}

Detect Safari using jQuery

unfortunately the above examples will also detect android's default browser as Safari, which it is not. I used navigator.userAgent.indexOf('Safari') != -1 && navigator.userAgent.indexOf('Chrome') == -1 && navigator.userAgent.indexOf('Android') == -1

Iterate over values of object

No, there's no direct method to do that with objects.

The Map type does have a values() method that returns an iterator for the values

Getting rid of all the rounded corners in Twitter Bootstrap

This question is pretty old however it is highly visible on search engines even in Bootstrap 4 related searches. I think it worths to add an answer for disabling the rounded corners, BS4 way.

In the _variables.scss there are several global modifiers exists to quickly change the stuff such as enabling or disabling flex gird system, rounded corners, gradients etc. :

$enable-flex:          false !default;
$enable-rounded:       true !default; // <-- This one
$enable-shadows:       false !default;
$enable-gradients:     false !default;
$enable-transitions:   false !default;

Rounded corners are enabled by default.

If you prefer compiling the Bootstrap 4 using Sass and your very own _custom.scss like me (or using official customizer), overriding the related variable is enough:

$enable-rounded : false

Log.INFO vs. Log.DEBUG

I usually try to use it like this:

DEBUG: Information interesting for Developers, when trying to debug a problem.
INFO: Information interesting for Support staff trying to figure out the context of a given error
WARN to FATAL: Problems and Errors depending on level of damage.

Date to milliseconds and back to date in Swift

Heres a simple solution in Swift 5/iOS 13.

extension Date {
    
    func toMilliseconds() -> Int64 {
        Int64(self.timeIntervalSince1970 * 1000)
    }

    init(milliseconds:Int) {
        self = Date().advanced(by: TimeInterval(integerLiteral: Int64(milliseconds / 1000)))
    }
}

This however assumes you have calculated the difference between UTF time and local time and adjusted and accounted for in the milliseconds. For that look to calendar

var cal = Calendar.current
cal.timeZone = TimeZone(abbreviation: "UTC")!
let difference = cal.compare(dateGiven, to: date, toGranularity: .nanosecond)

GDB: Listing all mapped memory regions for a crashed process

The problem with maintenance info sections is that command tries to extract information from the section header of the binary. It does not work if the binary is tripped (e.g by sstrip) or it gives wrong information when the loader may change the memory permission after loading (e.g. the case of RELRO).

How do I compile a Visual Studio project from the command-line?

I know of two ways to do it.

Method 1
The first method (which I prefer) is to use msbuild:

msbuild project.sln /Flags...

Method 2
You can also run:

vcexpress project.sln /build /Flags...

The vcexpress option returns immediately and does not print any output. I suppose that might be what you want for a script.

Note that DevEnv is not distributed with Visual Studio Express 2008 (I spent a lot of time trying to figure that out when I first had a similar issue).

So, the end result might be:

os.system("msbuild project.sln /p:Configuration=Debug")

You'll also want to make sure your environment variables are correct, as msbuild and vcexpress are not by default on the system path. Either start the Visual Studio build environment and run your script from there, or modify the paths in Python (with os.putenv).

Uint8Array to string in Javascript

TextEncoder and TextDecoder from the Encoding standard, which is polyfilled by the stringencoding library, converts between strings and ArrayBuffers:

var uint8array = new TextEncoder("utf-8").encode("¢");
var string = new TextDecoder("utf-8").decode(uint8array);

open link of google play store in mobile version android

You can check if the Google Play Store app is installed and, if this is the case, you can use the "market://" protocol.

final String my_package_name = "........."  // <- HERE YOUR PACKAGE NAME!!
String url = "";

try {
    //Check whether Google Play store is installed or not:
    this.getPackageManager().getPackageInfo("com.android.vending", 0);

    url = "market://details?id=" + my_package_name;
} catch ( final Exception e ) {
    url = "https://play.google.com/store/apps/details?id=" + my_package_name;
}


//Open the app page in Google Play store:
final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
startActivity(intent);

How to add \newpage in Rmarkdown in a smart way?

You can make the pagebreak conditional on knitting to PDF. This worked for me.

```{r, results='asis', eval=(opts_knit$get('rmarkdown.pandoc.to') == 'latex')}
cat('\\pagebreak')
```

How to validate an email address in JavaScript

Following Regex validations:

No spacial characters before @
(-) and (.) should not be together after @ No special characters after @ 2 characters must before @ Email length should be less 128 characters

function validateEmail(email) {
var chrbeforAt = email.substr(0, email.indexOf('@'));
if (!($.trim(email).length > 127)) {
    if (chrbeforAt.length >= 2) {
        var re = /^(([^<>()[\]{}'^?\\.,!|//#%*-+=&;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/;
        //var re = /[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/;
        return re.test(email);
    } else {
        return false;
    }
} else {
    return false;
}
}

How can I use xargs to copy files that have spaces and quotes in their names?

I used Bill Star's answer slightly modified on Solaris:

find . -mtime +2 | perl -pe 's{^}{\"};s{$}{\"}' > ~/output.file

This will put quotes around each line. I didn't use the '-l' option although it probably would help.

The file list I was going though might have '-', but not newlines. I haven't used the output file with any other commands as I want to review what was found before I just start massively deleting them via xargs.

Laravel-5 'LIKE' equivalent (Eloquent)

$data = DB::table('borrowers')
        ->join('loans', 'borrowers.id', '=', 'loans.borrower_id')
        ->select('borrowers.*', 'loans.*')   
        ->where('loan_officers', 'like', '%' . $officerId . '%')
        ->where('loans.maturity_date', '<', date("Y-m-d"))
        ->get();

How can I read Chrome Cache files?

The JPEXS Free Flash Decompiler has Java code to do this at in the source tree for both Chrome and Firefox (no support for Firefox's more recent cache2 though).

JQuery to load Javascript file dynamically

I realize I am a little late here, (5 years or so), but I think there is a better answer than the accepted one as follows:

$("#addComment").click(function() {
    if(typeof TinyMCE === "undefined") {
        $.ajax({
            url: "tinymce.js",
            dataType: "script",
            cache: true,
            success: function() {
                TinyMCE.init();
            }
        });
    }
});

The getScript() function actually prevents browser caching. If you run a trace you will see the script is loaded with a URL that includes a timestamp parameter:

http://www.yoursite.com/js/tinymce.js?_=1399055841840

If a user clicks the #addComment link multiple times, tinymce.js will be re-loaded from a differently timestampped URL. This defeats the purpose of browser caching.

===

Alternatively, in the getScript() documentation there is a some sample code that demonstrates how to enable caching by creating a custom cachedScript() function as follows:

jQuery.cachedScript = function( url, options ) {

    // Allow user to set any option except for dataType, cache, and url
    options = $.extend( options || {}, {
        dataType: "script",
        cache: true,
        url: url
    });

    // Use $.ajax() since it is more flexible than $.getScript
    // Return the jqXHR object so we can chain callbacks
    return jQuery.ajax( options );
};

// Usage
$.cachedScript( "ajax/test.js" ).done(function( script, textStatus ) {
    console.log( textStatus );
});

===

Or, if you want to disable caching globally, you can do so using ajaxSetup() as follows:

$.ajaxSetup({
    cache: true
});

Difference between /res and /assets directories

If you need to refer them somewhere in the Java Code, you'd rahter put your files into the "res" directory.

And all files in the res folder will be indexed in the R file, which makes it much faster (and much easier!) to load them.

What is the LDF file in SQL Server?

The LDF stand for 'Log database file' and it is the transaction log. It keeps a record of everything done to the database for rollback purposes, you can restore a database even you lost .msf file because it contain all control information plus transaction information .

C# listView, how do I add items to columns 2, 3 and 4 etc?

For your problem use like this:

ListViewItem row = new ListViewItem(); 
row.SubItems.Add(value.ToString()); 
listview1.Items.Add(row);

Reading CSV file and storing values into an array

Here's a special case where one of data field has semicolon (";") as part of it's data in that case most of answers above will fail.

Solution it that case will be

string[] csvRows = System.IO.File.ReadAllLines(FullyQaulifiedFileName);
string[] fields = null;
List<string> lstFields;
string field;
bool quoteStarted = false;
foreach (string csvRow in csvRows)
{
    lstFields = new List<string>();
    field = "";
    for (int i = 0; i < csvRow.Length; i++)
    {
        string tmp = csvRow.ElementAt(i).ToString();
        if(String.Compare(tmp,"\"")==0)
        {
            quoteStarted = !quoteStarted;
        }
        if (String.Compare(tmp, ";") == 0 && !quoteStarted)
        {
            lstFields.Add(field);
            field = "";
        }
        else if (String.Compare(tmp, "\"") != 0)
        {
            field += tmp;
        }
    }
    if(!string.IsNullOrEmpty(field))
    {
        lstFields.Add(field);
        field = "";
    }
// This will hold values for each column for current row under processing
    fields = lstFields.ToArray(); 
}

How do I implement a callback in PHP?

well... with 5.3 on the horizon, all will be better, because with 5.3, we'll get closures and with them anonymous functions

http://wiki.php.net/rfc/closures

Calculate the display width of a string in Java

Use the getWidth method in the following class:

import java.awt.*;
import java.awt.geom.*;
import java.awt.font.*;

class StringMetrics {

  Font font;
  FontRenderContext context;

  public StringMetrics(Graphics2D g2) {

    font = g2.getFont();
    context = g2.getFontRenderContext();
  }

  Rectangle2D getBounds(String message) {

    return font.getStringBounds(message, context);
  }

  double getWidth(String message) {

    Rectangle2D bounds = getBounds(message);
    return bounds.getWidth();
  }

  double getHeight(String message) {

    Rectangle2D bounds = getBounds(message);
    return bounds.getHeight();
  }

}

Verify host key with pysftp

Cook book to use different ways of pysftp.CnOpts() and hostkeys options.

Source : https://pysftp.readthedocs.io/en/release_0.2.9/cookbook.html

Host Key checking is enabled by default. It will use ~/.ssh/known_hosts by default. If you wish to disable host key checking (NOT ADVISED) you will need to modify the default CnOpts and set the .hostkeys to None.

import pysftp
cnopts = pysftp.CnOpts()
cnopts.hostkeys = None
with pysftp.Connection('host', username='me', password='pass', cnopts=cnopts):
    # do stuff here

To use a completely different known_hosts file, you can override CnOpts looking for ~/.ssh/known_hosts by specifying the file when instantiating.

import pysftp
cnopts = pysftp.CnOpts(knownhosts='path/to/your/knownhostsfile')

with pysftp.Connection('host', username='me', password='pass', cnopts=cnopts):
    # do stuff here

If you wish to use ~/.ssh/known_hosts but add additional known host keys you can merge with update additional known_host format files by using .load method.

import pysftp
cnopts = pysftp.CnOpts()
cnopts.hostkeys.load('path/to/your/extra_knownhosts')
with pysftp.Connection('host', username='me', password='pass', cnopts=cnopts):
    # do stuff here

Add Insecure Registry to Docker

Creating /etc/docker/daemon.json file and adding the below content and then doing a docker restart on CentOS 7 resolved the issue.

{
    "insecure-registries" : [ "hostname.cloudapp.net:5000" ]
}

How do you replace all the occurrences of a certain character in a string?

I would use the translate method without translation table. It deletes the letters in second argument in recent Python versions.

def remove_chars(line):
    line7=line[7].translate(None,'abcd')
    return line[:7]+[line7]+line[8:]

line= ['ad','da','sdf','asd',
        '3424','342sfas','asdfaf','sdfa',
        'afase']
print line[7]
line = remove_chars(line)
print line[7]

Why should hash functions use a prime number modulus?

Copying from my other answer https://stackoverflow.com/a/43126969/917428. See it for more details and examples.

I believe that it just has to do with the fact that computers work with in base 2. Just think at how the same thing works for base 10:

8 % 10 = 8
18 % 10 = 8
87865378 % 10 = 8

It doesn't matter what the number is: as long as it ends with 8, its modulo 10 will be 8.

Picking a big enough, non-power-of-two number will make sure the hash function really is a function of all the input bits, rather than a subset of them.

How to add a char/int to an char array in C?

In C/C++ a string is an array of char terminated with a NULL byte ('\0');

Your string str has not been initialized.
You must concatenate strings and you are trying to concatenate a single char (without the null byte so it's not a string) to a string.

The code should look like this:

char str[1024] = "Hello World"; //this will add all characters and a NULL byte to the array
char tmp[2] = "."; //this is a string with the dot 
strcat(str, tmp);  //here you concatenate the two strings

Note that you can assign a string literal to an array only during its declaration.
For example the following code is not permitted:

char str[1024];
str = "Hello World"; //FORBIDDEN

and should be replaced with

char str[1024];
strcpy(str, "Hello World"); //here you copy "Hello World" inside the src array

Insert multiple rows with one query MySQL

While inserting multiple rows with a single INSERT statement is generally faster, it leads to a more complicated and often unsafe code. Below I present the best practices when it comes to inserting multiple records in one go using PHP.

To insert multiple new rows into the database at the same time, one needs to follow the following 3 steps:

Start transaction (disable autocommit mode)
Prepare INSERT statement
Execute it multiple times

Using database transactions ensures that the data is saved in one piece and significantly improves performance.

How to properly insert multiple rows using PDO

PDO is the most common choice of database extension in PHP and inserting multiple records with PDO is quite simple.

$pdo = new \PDO("mysql:host=localhost;dbname=test;charset=utf8mb4", 'user', 'password', [
    \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
    \PDO::ATTR_EMULATE_PREPARES => false
]);

// Start transaction
$pdo->beginTransaction();

// Prepare statement
$stmt = $pdo->prepare('INSERT 
    INTO `pxlot` (realname,email,address,phone,status,regtime,ip) 
    VALUES (?,?,?,?,?,?,?)');

// Perform execute() inside a loop
// Sample data coming from a fictitious data set, but the data can come from anywhere
foreach ($dataSet as $data) {
    // All seven parameters are passed into the execute() in a form of an array
    $stmt->execute([$data['name'], $data['email'], $data['address'], getPhoneNo($data['name']), '0', $data['regtime'], $data['ip']]);
}

// Commit the data into the database
$pdo->commit();

How to properly insert multiple rows using mysqli

The mysqli extension is a little bit more cumbersome to use but operates on very similar principles. The function names are different and take slightly different parameters.

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new \mysqli('localhost', 'user', 'password', 'database');
$mysqli->set_charset('utf8mb4');

// Start transaction
$mysqli->begin_transaction();

// Prepare statement
$stmt = $mysqli->prepare('INSERT 
    INTO `pxlot` (realname,email,address,phone,status,regtime,ip) 
    VALUES (?,?,?,?,?,?,?)');

// Perform execute() inside a loop
// Sample data coming from a fictitious data set, but the data can come from anywhere
foreach ($dataSet as $data) {
    // mysqli doesn't accept bind in execute yet, so we have to bind the data first
    // The first argument is a list of letters denoting types of parameters. It's best to use 's' for all unless you need a specific type
    // bind_param doesn't accept an array so we need to unpack it first using '...'
    $stmt->bind_param('sssssss', ...[$data['name'], $data['email'], $data['address'], getPhoneNo($data['name']), '0', $data['regtime'], $data['ip']]);
    $stmt->execute();
}

// Commit the data into the database
$mysqli->commit();

Performance

Both extensions offer the ability to use transactions. Executing prepared statement with transactions greatly improves performance, but it's still not as good as a single SQL query. However, the difference is so negligible that for the sake of conciseness and clean code it is perfectly acceptable to execute prepared statements multiple times. If you need a faster option to insert many records into the database at once, then chances are that PHP is not the right tool.

What is AF_INET, and why do I need it?

AF_INET is an address family that is used to designate the type of addresses that your socket can communicate with (in this case, Internet Protocol v4 addresses). When you create a socket, you have to specify its address family, and then you can only use addresses of that type with the socket. The Linux kernel, for example, supports 29 other address families such as UNIX (AF_UNIX) sockets and IPX (AF_IPX), and also communications with IRDA and Bluetooth (AF_IRDA and AF_BLUETOOTH, but it is doubtful you'll use these at such a low level).

For the most part, sticking with AF_INET for socket programming over a network is the safest option. There is also AF_INET6 for Internet Protocol v6 addresses.

Hope this helps,

How to refresh Android listview?

on other option is onWindowFocusChanged method, but sure its sensitive and needs some extra coding for whom is interested

 override fun onWindowFocusChanged(hasFocus: Boolean) {
        super.onWindowFocusChanged(hasFocus)

       // some controls needed
        programList = usersDBHelper.readProgram(model.title!!)
        notesAdapter = DailyAdapter(this, programList)
        notesAdapter.notifyDataSetChanged()
        listview_act_daily.adapter = notesAdapter
    }

Insert HTML with React Variable Statements (JSX)

If anyone else still lands here. With ES6 you can create your html variable like so:

render(){
    var thisIsMyCopy = (
        <p>copy copy copy <strong>strong copy</strong></p>
    );
    return(
        <div>
            {thisIsMyCopy}
        </div>
    )
}

How to make a PHP SOAP call using the SoapClient class

read this;-

http://php.net/manual/en/soapclient.call.php

This is a good example, for the SOAP function "__call". However it is deprecated.

<?php
    $wsdl = "http://webservices.tekever.eu/ctt/?wsdl";
    $int_zona = 5;
    $int_peso = 1001;
    $cliente = new SoapClient($wsdl);
    print "<p>Envio Internacional: ";
    $vem = $cliente->__call('CustoEMSInternacional',array($int_zona, $int_peso));
    print $vem;
    print "</p>";
?>

How to break out of multiple loops?

PEP 3136 proposes labeled break/continue. Guido rejected it because "code so complicated to require this feature is very rare". The PEP does mention some workarounds, though (such as the exception technique), while Guido feels refactoring to use return will be simpler in most cases.

'this' implicitly has type 'any' because it does not have a type annotation

For method decorator declaration with configuration "noImplicitAny": true, you can specify type of this variable explicitly depends on @tony19's answer

function logParameter(this:any, target: Object, propertyName: string) {
  //...
}

How to import a new font into a project - Angular 5

You can try creating a css for your font with font-face (like explained here)

Step #1

Create a css file with font face and place it somewhere, like in assets/fonts

customfont.css

@font-face {
    font-family: YourFontFamily;
    src: url("/assets/font/yourFont.otf") format("truetype");
}

Step #2

Add the css to your .angular-cli.json in the styles config

"styles":[
 //...your other styles
 "assets/fonts/customFonts.css"
 ]

Do not forget to restart ng serve after doing this

Step #3

Use the font in your code

component.css

span {font-family: YourFontFamily; }

How to detect IE11?

This appears to be a better method. "indexOf" returns -1 if nothing is matched. It doesn't overwrite existing classes on the body, just adds them.

// add a class on the body ie IE 10/11
var uA = navigator.userAgent;
if(uA.indexOf('Trident') != -1 && uA.indexOf('rv:11') != -1){
    document.body.className = document.body.className+' ie11';
}
if(uA.indexOf('Trident') != -1 && uA.indexOf('MSIE 10.0') != -1){
    document.body.className = document.body.className+' ie10';
}

Is there an R function for finding the index of an element in a vector?

The function match works on vectors:

x <- sample(1:10)
x
# [1]  4  5  9  3  8  1  6 10  7  2
match(c(4,8),x)
# [1] 1 5

match only returns the first encounter of a match, as you requested. It returns the position in the second argument of the values in the first argument.

For multiple matching, %in% is the way to go:

x <- sample(1:4,10,replace=TRUE)
x
# [1] 3 4 3 3 2 3 1 1 2 2
which(x %in% c(2,4))
# [1]  2  5  9 10

%in% returns a logical vector as long as the first argument, with a TRUE if that value can be found in the second argument and a FALSE otherwise.

PHP ini file_get_contents external url

The setting you are looking for is allow_url_fopen.

You have two ways of getting around it without changing php.ini, one of them is to use fsockopen(), and the other is to use cURL.

I recommend using cURL over file_get_contents() anyways, since it was built for this.

How to set JFrame to appear centered, regardless of monitor resolution?

You can use this method, which allows the JFrame to be centered and full screen at the same time.

yourframe.setExtendedState(JFrame.MAXIMIZED_BOTH);

SSH Private Key Permissions using Git GUI or ssh-keygen are too open

I'm playing right now with Git 1.6.5, and I can't replicate your setup:

Administrator@WS2008 /k/git
$ ll ~/.ssh
total 8
drwxr-xr-x    2 Administ Administ     4096 Oct 13 22:04 ./
drwxr-xr-x    6 Administ Administ     4096 Oct  6 21:36 ../
-rw-r--r--    1 Administ Administ        0 Oct 13 22:04 c.txt
-rw-r--r--    1 Administ Administ      403 Sep 30 22:36 config_disabled
-rw-r--r--    1 Administ Administ      887 Aug 30 16:33 id_rsa
-rw-r--r--    1 Administ Administ      226 Aug 30 16:34 id_rsa.pub
-rw-r--r--    1 Administ Administ      843 Aug 30 16:32 id_rsa_putty.ppk
-rw-r--r--    1 Administ Administ      294 Aug 30 16:33 id_rsa_putty.pub
-rw-r--r--    1 Administ Administ     1626 Sep 30 22:49 known_hosts

Administrator@WS2008 /k/git
$ git clone [email protected]:alexandrul/gitbook.git
Initialized empty Git repository in k:/git/gitbook/.git/
remote: Counting objects: 1152, done.
remote: Compressing objects: 100% (625/625), done.
remote: Total 1152 (delta 438), reused 1056 (delta 383)s
Receiving objects: 100% (1152/1152), 1.31 MiB | 78 KiB/s, done.
Resolving deltas: 100% (438/438), done.

Administrator@WS2008 /k/git
$ ssh [email protected]
ERROR: Hi alexandrul! You've successfully authenticated, but GitHub does not pro
vide shell access
Connection to github.com closed.

$ ssh -v
OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007

chmod doesn't modify file permissions for my keys either.

Environment:

Windows Server 2008 SP2 on NTFS
user: administrator
environment vars:
- PLINK_PROTOCOL=ssh
- HOME=/c/profiles/home

Update: Git 1.6.5.1 works as well.

Observable.of is not a function

RxJS 6

When upgrading to version 6 of the RxJS library and not using the rxjs-compat package the following code

import 'rxjs/add/observable/of';   
  // ...
  return Observable.of(res);

has to be changed into

import { of } from 'rxjs';
  // ...
  return of(res);

How to access the GET parameters after "?" in Express?

A nice technique i've started using with some of my apps on express is to create an object which merges the query, params, and body fields of express's request object.

//./express-data.js
const _ = require("lodash");

class ExpressData {

    /*
    * @param {Object} req - express request object
    */
    constructor (req) {

        //Merge all data passed by the client in the request
        this.props = _.merge(req.body, req.params, req.query);
     }

}

module.exports = ExpressData;

Then in your controller body, or anywhere else in scope of the express request chain, you can use something like below:

//./some-controller.js

const ExpressData = require("./express-data.js");
const router = require("express").Router();


router.get("/:some_id", (req, res) => {

    let props = new ExpressData(req).props;

    //Given the request "/592363122?foo=bar&hello=world"
    //the below would log out 
    // {
    //   some_id: 592363122,
    //   foo: 'bar',
    //   hello: 'world'
    // }
    console.log(props);

    return res.json(props);
});

This makes it nice and handy to just "delve" into all of the "custom data" a user may have sent up with their request.

Note

Why the 'props' field? Because that was a cut-down snippet, I use this technique in a number of my APIs, I also store authentication / authorisation data onto this object, example below.

/*
 * @param {Object} req - Request response object
*/
class ExpressData {

    /*
    * @param {Object} req - express request object
    */
    constructor (req) {

        //Merge all data passed by the client in the request
        this.props = _.merge(req.body, req.params, req.query);

        //Store reference to the user
        this.user = req.user || null;

        //API connected devices (Mobile app..) will send x-client header with requests, web context is implied.
        //This is used to determine how the user is connecting to the API 
        this.client = (req.headers) ? (req.headers["x-client"] || (req.client || "web")) : "web";
    }
}

How to use executeReader() method to retrieve the value of just one cell

It is not recommended to use DataReader and Command.ExecuteReader to get just one value from the database. Instead, you should use Command.ExecuteScalar as following:

String sql = "SELECT ColumnNumber FROM learer WHERE learer.id = " + index;
SqlCommand cmd = new SqlCommand(sql,conn);
learerLabel.Text = (String) cmd.ExecuteScalar();

Here is more information about Connecting to database and managing data.

How to find item with max value using linq?

With EF or LINQ to SQL:

var item = db.Items.OrderByDescending(i => i.Value).FirstOrDefault();

With LINQ to Objects I suggest to use morelinq extension MaxBy (get morelinq from nuget):

var item = items.MaxBy(i => i.Value);

Color Tint UIButton Image

You must set the image rendering mode to UIImageRenderingModeAlwaysTemplate in order to have the tintColor affect the UIImage. Here is the solution in Swift:

let image = UIImage(named: "image-name")
let button = UIButton()
button.setImage(image?.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate), forState: .Normal)
button.tintColor = UIColor.whiteColor()

SWIFT 4x

button.setImage(image.withRenderingMode(UIImage.RenderingMode.alwaysTemplate), for: .normal)
button.tintColor = UIColor.blue

HTML 5: Is it <br>, <br/>, or <br />?

According to the spec the expected form is <br> for HTML 5 but a closing slash is permitted.

twitter bootstrap autocomplete dropdown / combobox with Knockoutjs

Select2 for Bootstrap 3 native plugin

https://fk.github.io/select2-bootstrap-css/index.html

this plugin uses select2 jquery plugin

nuget

PM> Install-Package Select2-Bootstrap

pretty-print JSON using JavaScript

I ran into an issue today with @Pumbaa80's code. I'm trying to apply JSON syntax highlighting to data that I'm rendering in a Mithril view, so I need to create DOM nodes for everything in the JSON.stringify output.

I split the really long regex into its component parts as well.

render_json = (data) ->
  # wraps JSON data in span elements so that syntax highlighting may be
  # applied. Should be placed in a `whitespace: pre` context
  if typeof(data) isnt 'string'
    data = JSON.stringify(data, undefined, 2)
  unicode =     /"(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?/
  keyword =     /\b(true|false|null)\b/
  whitespace =  /\s+/
  punctuation = /[,.}{\[\]]/
  number =      /-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/

  syntax = '(' + [unicode, keyword, whitespace,
            punctuation, number].map((r) -> r.source).join('|') + ')'
  parser = new RegExp(syntax, 'g')

  nodes = data.match(parser) ? []
  select_class = (node) ->
    if punctuation.test(node)
      return 'punctuation'
    if /^\s+$/.test(node)
      return 'whitespace'
    if /^\"/.test(node)
      if /:$/.test(node)
        return 'key'
      return 'string'

    if /true|false/.test(node)
      return 'boolean'

     if /null/.test(node)
       return 'null'
     return 'number'
  return nodes.map (node) ->
    cls = select_class(node)
    return Mithril('span', {class: cls}, node)

Code in context on Github here

How to Flatten a Multidimensional Array?

If you really don't like a recursion ... try shifting instead :)

$a = array(1,2,array(3,4, array(5,6,7), 8), 9);
$o = [];
for ($i=0; $i<count($a); $i++) {
    if (is_array($a[$i])) {
        array_splice($a, $i+1, 0, $a[$i]);
    } else {
        $o[] = $a[$i];
    }
}

Note: In this simple version, this does not support array keys.

How can I increase the size of a bootstrap button?

Just simply add to the class of the bootstrap code.

_x000D_

.login
{
width: 20%;
margin-top: 39.5%;
margin-left: 35%;
}

_x000D_

<button type="button" class="btn btn-outline-dark btn-lg login">Login</button>

_x000D_

python date of the previous month

Building off the comment of @J.F. Sebastian, you can chain the replace() function to go back one "month". Since a month is not a constant time period, this solution tries to go back to the same date the previous month, which of course does not work for all months. In such a case, this algorithm defaults to the last day of the prior month.

from datetime import datetime, timedelta

d = datetime(2012, 3, 31) # A problem date as an example

# last day of last month
one_month_ago = (d.replace(day=1) - timedelta(days=1))
try:
    # try to go back to same day last month
    one_month_ago = one_month_ago.replace(day=d.day)
except ValueError:
    pass
print("one_month_ago: {0}".format(one_month_ago))

Output:

one_month_ago: 2012-02-29 00:00:00

How to format x-axis time scale values in Chart.js v2

as per the Chart js documentation page tick configuration section. you can format the value of each tick using the callback function. for example I wanted to change locale of displayed dates to be always German. in the ticks parts of the axis options

ticks: {
    callback: function(value) { 
        return new Date(value).toLocaleDateString('de-DE', {month:'short', year:'numeric'}); 
    },
},

How to check whether an object is a date?

This is a pretty simple approach and doesn't experience a lot of the edge cases in the existing answers.

// Invalid Date.getTime() will produce NaN
if (date instanceof Date && date.getTime()) {
    console.log("is date!");
}

It won't fire with other objects like numbers, makes sure the value is actually a Date (rather than an object that looks like one), and it avoids Invalid Dates.

How do I change the root directory of an Apache server?

If you couldn't find http.conf and followed Nick's way.

Restart Apache using sudo service apache2 restart.

how do I get a new line, after using float:left?

Try the clear property.

Remember that float removes an element from the document layout - so yes, in a way it is "interfering" with br and p tags, in the sense that it would basically be ignoring anything in the main flow layout.

jquery input select all on focus

<script>$.ready( $("input[type=text]").attr("onclick" , "this.select()"));<script>

Split array into two parts without for loop in java

Use this code it works perfectly for odd or even list sizes. Hope it help somebody .

 int listSize = listOfArtist.size();
 int mid = 0;
 if (listSize % 2 == 0) {
    mid = listSize / 2;
    Log.e("Parting", "You entered an even number. mid " + mid
                    + " size is " + listSize);
 } else {
    mid = (listSize + 1) / 2;
    Log.e("Parting", "You entered an odd number. mid " + mid
                    + " size is " + listSize);
 }
 //sublist returns List convert it into arraylist * very important
 leftArray = new ArrayList<ArtistModel>(listOfArtist.subList(0, mid));
 rightArray = new ArrayList<ArtistModel>(listOfArtist.subList(mid,
                listSize));

How to rename a single column in a data.frame?

You can use the rename.vars in the gdata package.

library(gdata)
df <- rename.vars(df, from = "oldname", to = "newname")

This is particularly useful where you have more than one variable name to change or you want to append or pre-pend some text to the variable names, then you can do something like:

df <- rename.vars(df, from = c("old1", "old2", "old3", 
         to = c("new1", "new2", "new3"))

For an example of appending text to a subset of variables names see: https://stackoverflow.com/a/28870000/180892

MySQL JOIN the most recent row only?

It's a good idea that logging actual data into "customer_data" table. With this data you can select all data from "customer_data" table as you wish.

How to multiply values using SQL

Here it is:

select player_name, player_salary, (player_salary * 1.1) as player_newsalary
from player 
order by player_name, player_salary, player_newsalary desc

You don't need to "group by" if there is only one instance of a player in the table.

Handling multiple IDs in jQuery

Solution:

To your secondary question

var elem1 = $('#elem1'),
    elem2 = $('#elem2'),
    elem3 = $('#elem3');

You can use the variable as the replacement of selector.

elem1.css({'display':'none'}); //will work

In the below case selector is already stored in a variable.

$(elem1,elem2,elem3).css({'display':'none'}); // will not work

Count number of 1's in binary representation

The function takes an int and returns the number of Ones in binary representation

public static int findOnes(int number)
{

   if(number < 2)
    {
        if(number == 1)
        {
            count ++;
        }
        else
        {
            return 0;
        }
    }

    value = number % 2;

    if(number != 1 && value == 1)
        count ++;

    number /= 2;

    findOnes(number);

    return count;
}

How to kill a nodejs process in Linux?

pkill is the easiest command line utility

pkill -f node

pkill -f nodejs

whatever name the process runs as for your os

.NET - Get protocol, host, and port

A more structured way to get this is to use UriBuilder. This avoids direct string manipulation.

var builder = new UriBuilder(Request.Url.Scheme, Request.Url.Host, Request.Url.Port);

Select box arrow style

in Firefox 39 I've found that setting a border to the select element will render the arrow as (2). No border set, will render the arrow as (1). I think it's a bug.

jQuery addClass onClick

Try to make your css more specific so that the new (green) style is more specific than the previous one, so that it worked for me!

For example, you might use in css:

button:active {/*your style here*/}

Instead of (probably not working):

.active {/*style*/} (.active is not a pseudo-class)

Hope it helps!

How to parse XML in Bash?

Check out XML2 from http://www.ofb.net/~egnor/xml2/ which converts XML to a line-oriented format.

ADB not recognising Nexus 4 under Windows 7

I have 2 Nexus 4 devices. One was connecting to ADB without any problems, the second one never showed up when I used the adb devices command. An additional symptom was, that the second phone did not show up as a portable device in Windows Explorer when the phone was set to Media mode.

At some point I found that a temporary solution for the second Nexus was to switch it to PTP mode. Then it was found by the adb devices command. The weired thing was that the first phone worked in both modes all the time!

Finally I found this solution that now allows me to connect both phones in both modes:

set USB mode of the phone to MTP (Media)
Using PC device manager uninstall the device ->Android Device ->Android ADB Interface
Make sure to check the box "Delete the driver software"!
then set the USB mode of the phone to PTP (Camera)
Using PC device manager uninstall the device ->Portable Devies ->Nexus 4
Then unplug the USB and plug it back in (ensuring that its set to MTP (Media) and I found that the device was correctly registered in Device manager as a ->Portable Devies ->Nexus 4

Solution found at: http://forum.xda-developers.com/showthread.php?p=34910298#post34910298

If you have a similar problem to connect your Nexus to ADB then I recommend to first switch it to PTP mode. If your problem vanishes with that step, I recommend to go through the additional steps listed above as MTP will probably be the mode you will want to set your phone to most of the time.

Round up to Second Decimal Place in Python

Here's a simple way to do it that I don't see in the other answers.

To round up to the second decimal place:

>>> n = 0.022499999999999999
>>> 
>>> -(-n//.01) * .01
0.03
>>>

Other value:

>>> n = 0.1111111111111000
>>> 
>>> -(-n//.01) * .01
0.12
>>>

With floats there's the occasional value with some minute imprecision, which can be corrected for if you're displaying the values for instance:

>>> n = 10.1111111111111000
>>> 
>>> -(-n//0.01) * 0.01
10.120000000000001
>>> 
>>> f"{-(-n//0.01) * 0.01:.2f}"
'10.12'
>>>

A simple roundup function with a parameter to specify precision:

>>> roundup = lambda n, p: -(-n//10**-p) * 10**-p
>>> 
>>> # Or if you want to ensure truncation using the f-string method:
>>> roundup = lambda n, p: float(f"{-(-n//10**-p) * 10**-p:.{p}f}")
>>> 
>>> roundup(0.111111111, 2)
0.12
>>> roundup(0.111111111, 3)
0.112

How to run the Python program forever?

Yes, you can use a while True: loop that never breaks to run Python code continually.

However, you will need to put the code you want to run continually inside the loop:

#!/usr/bin/python

while True:
    # some python code that I want 
    # to keep on running

Also, time.sleep is used to suspend the operation of a script for a period of time. So, since you want yours to run continually, I don't see why you would use it.

Provide static IP to docker containers via docker-compose

I was facing some difficulties with an environment variable that is with custom name (not with container name /port convention for KAPACITOR_BASE_URL and KAPACITOR_ALERTS_ENDPOINT). If we give service name in this case it wouldn't resolve the ip as

KAPACITOR_BASE_URL:  http://kapacitor:9092

In above http://[**kapacitor**]:9092 would not resolve to http://172.20.0.2:9092

I resolved the static IPs issues using subnetting configurations.

version: "3.3"

networks:
  frontend:
    ipam:
      config:
        - subnet: 172.20.0.0/24
services:
    db:
        image: postgres:9.4.4
        networks:
            frontend:
                ipv4_address: 172.20.0.5
        ports:
            - "5432:5432"
        volumes:
            - postgres_data:/var/lib/postgresql/data

    redis:
        image: redis:latest
        networks:
            frontend:
                ipv4_address: 172.20.0.6
        ports:
            - "6379"

    influxdb:
        image: influxdb:latest
        ports:
            - "8086:8086"
            - "8083:8083"
        volumes:
            - ../influxdb/influxdb.conf:/etc/influxdb/influxdb.conf
            - ../influxdb/inxdb:/var/lib/influxdb
        networks:
            frontend:
                ipv4_address: 172.20.0.4
        environment:
          INFLUXDB_HTTP_AUTH_ENABLED: "false"
          INFLUXDB_ADMIN_ENABLED: "true"
          INFLUXDB_USERNAME: "db_username"
          INFLUXDB_PASSWORD: "12345678"
          INFLUXDB_DB: db_customers

    kapacitor:
        image: kapacitor:latest
        ports: 
            - "9092:9092"
        networks:
            frontend:
                ipv4_address: 172.20.0.2
        depends_on:
            - influxdb
        volumes:
            - ../kapacitor/kapacitor.conf:/etc/kapacitor/kapacitor.conf
            - ../kapacitor/kapdb:/var/lib/kapacitor
        environment:
          KAPACITOR_INFLUXDB_0_URLS_0: http://influxdb:8086

    web:
        build: .
        environment:
          RAILS_ENV: $RAILS_ENV
        command: bundle exec rails s -b 0.0.0.0
        ports:
            - "3000:3000"
        networks:
            frontend:
                ipv4_address: 172.20.0.3
        links:
            - db
            - kapacitor
        depends_on:
            - db
        volumes:
            - .:/var/app/current
        environment:
          DATABASE_URL: postgres://postgres@db
          DATABASE_USERNAME: postgres
          DATABASE_PASSWORD: postgres
          INFLUX_URL: http://influxdb:8086
          INFLUX_USER: db_username
          INFLUX_PWD: 12345678
          KAPACITOR_BASE_URL:  http://172.20.0.2:9092
          KAPACITOR_ALERTS_ENDPOINT: http://172.20.0.3:3000

volumes:
  postgres_data:

How to install packages offline?

offline python. for doing this I use virtualenv (isolated Python environment)

1) install virtualenv online with pip:

pip install virtualenv --user

or offline with whl: go to this link , download last version (.whl or tar.gz) and install that with this command:

pip install virtualenv-15.1.0-py2.py3-none-any.whl --user

by using --user you don't need to use sudo pip….

2) use virtualenv

on online machine select a directory with terminal cd and run this code:

python -m virtualenv myenv
cd myenv
source bin/activate
pip install Flask

after installing all the packages, you have to generate a requirements.txt so while your virtualenv is active, write

pip freeze > requirements.txt

open a new terminal and create another env like myenv2.

python -m virtualenv myenv2
cd myenv2
source bin/activate
cd -
ls

now you can go to your offline folder where your requirements.txt and tranferred_packages folder are in there. download the packages with following code and put all of them to tranferred_packages folder.

pip download -r requirements.txt

take your offline folder to offline computer and then

python -m virtualenv myenv2
cd myenv2
source bin/activate
cd -
cd offline
pip install --no-index --find-links="./tranferred_packages" -r requirements.txt

what is in the folder offline [requirements.txt , tranferred_packages {Flask-0.10.1.tar.gz, ...}]

check list of your package

pip list

note: as we are in 2017 it is better to use python 3. you can create python 3 virtualenv with this command.

virtualenv -p python3 envname

An array of List in c#

simple approach:

        List<int>[] a = new List<int>[100];
        for (int i = 0; i < a.Length; i++)
        {
            a[i] = new List<int>();
        }

or LINQ approach

        var b = Enumerable.Range(0,100).Select((i)=>new List<int>()).ToArray();

Python pip install fails: invalid command egg_info

This error can occur when you trying to install pycurl.

In this case you should do

sudo apt-get install libcurl4-gnutls-dev librtmp-dev

(founded here: https://gist.github.com/lxneng/1031014 )

How to build query string with Javascript

querystring can help.

So, you can

const querystring = require('querystring')

url += '?' + querystring.stringify(parameters)

How to avoid Sql Query Timeout

My team were experiencing these issues intermittently with long running SSIS packages. This has been happening since Windows server patching.

Our SSIS and SQL servers are on separate VM servers.

Working with our Wintel Servers team we rebooted both servers and for the moment, the problem appears to have gone away.

The engineer has said that they're unsure if the issue is the patches or new VMTools that they updated at the same time. We'll monitor for now and if the timeout problems recur, they'll try rolling back the VMXNET3 driver, first, then if that doesn't work, take off the June Rollup patches.

So for us the issue is nothing to do with our SQL Queries (we're loading billions of new rows so it has to be long running).

The breakpoint will not currently be hit. No symbols have been loaded for this document in a Silverlight application

I took the easiest path, actually in my multiple projects solution, including one class library, I had an issue with a .dll file created by that class library project which was not allowing me to have breakpoints while executing, because it was not building for some reason, I separately build that project and referenced it's output .dll and now the breakpoints are functional

Not sure, maybe this helps you; if not you then someone new like me just because it worked for me:)

Apache SSL Configuration Error (SSL Connection Error)

#Make sure that you specify the port for both http and https ie.
NameVirtualHost:80
NameVirtualHost:443
#and 
<VirtualHost *:80>
<VirtualHost *:443>

#mixing * and *:443 does not work it has to be *:80 and *:443

Imitating a blink tag with CSS3 animations

Let me show you a little trick.

As Arkanciscan said, you can use CSS3 transitions. But his solution looks different from the original tag.

What you really need to do is this:

_x000D_

@keyframes blink {_x000D_
  50% {_x000D_
    opacity: 0.0;_x000D_
  }_x000D_
}_x000D_
@-webkit-keyframes blink {_x000D_
  50% {_x000D_
    opacity: 0.0;_x000D_
  }_x000D_
}_x000D_
.blink {_x000D_
  animation: blink 1s step-start 0s infinite;_x000D_
  -webkit-animation: blink 1s step-start 0s infinite;_x000D_
}

_x000D_

<span class="blink">Blink</span>

_x000D_

JSfiddle Demo

Style the first <td> column of a table differently

If you've to support IE7, a more compatible solution is:

/* only the cells with no cell before (aka the first one) */
td {
    padding-left: 20px;
}
/* only the cells with at least one cell before (aka all except the first one) */
td + td {
    padding-left: 0;
}

Also works fine with li; general sibling selector ~ may be more suitable with mixed elements like a heading h1 followed by paragraphs AND a subheading and then again other paragraphs.

What is the difference between Step Into and Step Over in a debugger

Step Into The next expression on the currently-selected line to be executed is invoked, and execution suspends at the next executable line in the method that is invoked.

Step Over The currently-selected line is executed and suspends on the next executable line.

Split comma-separated input box values into array in jquery, and loop through it

var array = $('#searchKeywords').val().split(",");

then

$.each(array,function(i){
   alert(array[i]);
});

for (i=0;i<array.length;i++){
     alert(array[i]);
}

How to master AngularJS?

Please keep an eye on the mailing list for problems/solutions discussed by community members. https://groups.google.com/forum/?fromgroups#!forum/angular . It's been really useful to me.

Is there an easy way to convert Android Application to IPad, IPhone

yes there is. it is called corona sdk!

http://www.coronalabs.com/products/corona-sdk/

RegEx for matching "A-Z, a-z, 0-9, _" and "."

You could simply use ^[\w.]+ to match A-Z, a-z, 0-9 and _

Can't find AVD or SDK manager in Eclipse

I would suggest you to install the ADT plugin compatable with your Android SDK tools and try to install all the required plugins compatable with your Android SDK LIKE Android SDK tools Rev 20.0.3 Android SDK tools Rev 20.0.3 Android SDK Platform-tools Rev 14 Android 2.3.3(API 10) sdk platform rev 2 samples for sdk api 10 rev 1 ADT Plugin 20.0.3

Android Use Done button on Keyboard to click button

I copied the following code from AndroidStudio when you create a LoginActivity. I use the ime attributes

In your layout

<EditText android:id="@+id/unidades" android:layout_width="match_parent"
                    android:layout_height="wrap_content" android:hint="@string/prompt_unidades"
                    android:inputType="number" android:maxLines="1"
                    android:singleLine="true"
                    android:textAppearance="?android:textAppearanceSmall"
                    android:enabled="true" android:focusable="true"
                    android:gravity="right"
                    android:imeActionId="@+id/cantidad"
                    android:imeActionLabel="@string/add"
                    android:imeOptions="actionUnspecified"/>

In your Activity

editTextUnidades.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            if (actionId == R.id.cantidad || actionId == EditorInfo.IME_NULL) {
                addDetalle(null);
                return true;
            }
            return false;
        }
    });

"The POM for ... is missing, no dependency information available" even though it exists in Maven Repository

If the POM missing warning is of project's self module, the reason is that you are trying to mistakenly build from a sub-module directory. You need to run the build and install command from root directory of the project.

How can I remove a specific item from an array?

let array = [5,5,4,4,2,3,4]    
let newArray = array.join(',').replace('5','').split(',')

This example works if you want to remove one current item.

Difference between return and exit in Bash functions

First of all, return is a keyword and exit is a function.

That said, here's a simplest of explanations.

return

It returns a value from a function.

exit

It exits out of or abandons the current shell.

Is it possible to hide the cursor in a webpage using CSS or Javascript?

If you want to hide the cursor in the entire webpage, using body will not work unless it covers the entire visible page, which is not always the case. To make sure the cursor is hidden everywhere in the page, use:

document.documentElement.style.cursor = 'none';

To reenable it:

document.documentElement.style.cursor = 'auto';

The analogue with static CSS notation is in the answer by Pavel Salaquarda (in essence: html * {cursor:none})

How to list all tags along with the full message in git?

I prefer doing this on the command line, but if you don't mind a web interface and you use GitHub, you can visit https://github.com/user/repo/tags and click on the "..." next to each tag to display its annotation.

TypeError: Cannot read property 'then' of undefined

TypeError: Cannot read property 'then' of undefined when calling a Django service using AngularJS.

If you are calling a Python service, the code will look like below:

this.updateTalentSupplier=function(supplierObj){
  var promise = $http({
    method: 'POST',
      url: bbConfig.BWS+'updateTalentSupplier/',
      data:supplierObj,
      withCredentials: false,
      contentType:'application/json',
      dataType:'json'
    });
    return promise; //Promise is returned 
}

We are using MongoDB as the database(I know it doesn't matter. But if someone is searching with MongoDB + Python (Django) + AngularJS the result should come.

Calculate correlation for more than two variables?

See corr.test function in psych package:

> corr.test(mtcars[1:4])
Call:corr.test(x = mtcars[1:4])
Correlation matrix 
       mpg   cyl  disp    hp
mpg   1.00 -0.85 -0.85 -0.78
cyl  -0.85  1.00  0.90  0.83
disp -0.85  0.90  1.00  0.79
hp   -0.78  0.83  0.79  1.00
Sample Size 
     mpg cyl disp hp
mpg   32  32   32 32
cyl   32  32   32 32
disp  32  32   32 32
hp    32  32   32 32
Probability value 
     mpg cyl disp hp
mpg    0   0    0  0
cyl    0   0    0  0
disp   0   0    0  0
hp     0   0    0  0

And yet another shameless self-advert: https://gist.github.com/887249

What is the convention for word separator in Java package names?

Concatenation of words in the package name is something most developers don't do.

You can use something like.

com.stackoverflow.mypackage

Refer JLS Name Declaration

MySQL direct INSERT INTO with WHERE clause

Example of how to perform a INSERT INTO SELECT with a WHERE clause.

INSERT INTO #test2 (id) SELECT id FROM #test1 WHERE id > 2

How to flush output after each `echo` call?

Anti-virus software may also be interfering with output flushing. In my case, Kaspersky Anti-Virus 2013 was holding data chunks before sending it to the browser, even though I was using an accepted solution.

Python threading. How do I lock a thread?

You can see that your locks are pretty much working as you are using them, if you slow down the process and make them block a bit more. You had the right idea, where you surround critical pieces of code with the lock. Here is a small adjustment to your example to show you how each waits on the other to release the lock.

import threading
import time
import inspect

class Thread(threading.Thread):
    def __init__(self, t, *args):
        threading.Thread.__init__(self, target=t, args=args)
        self.start()

count = 0
lock = threading.Lock()

def incre():
    global count
    caller = inspect.getouterframes(inspect.currentframe())[1][3]
    print "Inside %s()" % caller
    print "Acquiring lock"
    with lock:
        print "Lock Acquired"
        count += 1  
        time.sleep(2)  

def bye():
    while count < 5:
        incre()

def hello_there():
    while count < 5:
        incre()

def main():    
    hello = Thread(hello_there)
    goodbye = Thread(bye)


if __name__ == '__main__':
    main()

Sample output:

...
Inside hello_there()
Acquiring lock
Lock Acquired
Inside bye()
Acquiring lock
Lock Acquired
...

How do I fix a "Performance counter registry hive consistency" when installing SQL Server R2 Express?

Well guys, the solution to the problem is the following:

click in: Start
write the word: ejecut
After, write: regedit
Open the directory: HKEY_LOCAL_MACHINE
SOFTWARE
Microsoft
Windows NT
CurrentVersion
Perflib
Check the following things:

1) Folder 00A: 2) Counter: the last number 3) Help: the last number

   Folder Perflib:
   Last Counter: 00A folder´s Counter 
   Last Help: 00A folder´s Help

Ready, verify the same number in both. success

Omitting one Setter/Getter in Lombok

User the below code for omit/excludes from creating setter and getter. value key should use inside @Getter and @Setter.

@Getter(value = AccessLevel.NONE)
@Setter(value = AccessLevel.NONE)
private int mySecret;

Spring boot 2.3 version, this is working well.

How to set the 'selected option' of a select dropdown list with jquery

You have to replace YourID and value="3" for your current ones.

_x000D_

$(document).ready(function() {_x000D_
  $('#YourID option[value="3"]').attr("selected", "selected");_x000D_
});

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>_x000D_
<select id="YourID">_x000D_
  <option value="1">A</option>_x000D_
  <option value="2">B</option>_x000D_
  <option value="3">C</option>_x000D_
  <option value="4">D</option>_x000D_
</select>

_x000D_

and value="3" for your current ones.

$('#YourID option[value="3"]').attr("selected", "selected");

<select id="YourID" >
<option value="1">A </option>
<option value="2">B</option>
<option value="3">C</option>
<option value="4">D</option>
</select>

Extracting zip file contents to specific directory in Python 2.7

Convert an ArrayList to an object array

You can use this code

ArrayList<TypeA> a = new ArrayList<TypeA>();
Object[] o = a.toArray();

Then if you want that to get that object back into TypeA just check it with instanceOf method.

How to run .sh on Windows Command Prompt?

you can use also cmder

Cmder is a software package created out of pure frustration over the absence of nice console emulators on Windows. It is based on amazing software, and spiced up with the Monokai color scheme and a custom prompt layout, looking sexy from the start

cmder.net

Passing a URL with brackets to curl

Never mind, I found it in the docs:

-g/--globoff
              This  option  switches  off  the "URL globbing parser". When you set this option, you can
              specify URLs that contain the letters {}[] without having them being interpreted by  curl
              itself.  Note  that  these  letters  are not normal legal URL contents but they should be
              encoded according to the URI standard.

Keeping ASP.NET Session Open / Alive

I spent a few days trying to figure out how to prolong a users session in WebForms via a popup dialog giving the user the option to renew the session or to allow it to expire. The #1 thing that you need to know is that you don't need any of this fancy 'HttpContext' stuff going on in some of the other answers. All you need is jQuery's $.post(); method. For example, while debugging I used:

$.post("http://localhost:5562/Members/Location/Default.aspx");

and on your live site you would use something like:

$.post("http://mysite/Members/Location/Default.aspx");

It's as easy as that. Furthermore, if you'd like to prompt the user with the option to renew their session do something similar to the following:

    <script type="text/javascript">
    $(function () { 
        var t = 9;
        var prolongBool = false;
        var originURL = document.location.origin;
        var expireTime = <%= FormsAuthentication.Timeout.TotalMinutes %>;

        // Dialog Counter
        var dialogCounter = function() {
            setTimeout( function() {
                $('#tickVar').text(t);
                    t--;
                    if(t <= 0 && prolongBool == false) {
                        var originURL = document.location.origin;
                        window.location.replace(originURL + "/timeout.aspx");
                        return;
                    }
                    else if(t <= 0) {
                        return;
                    }
                    dialogCounter();
            }, 1000);
        }

        var refreshDialogTimer = function() {
            setTimeout(function() { 
                $('#timeoutDialog').dialog('open');
            }, (expireTime * 1000 * 60 - (10 * 1000)) );
        };

        refreshDialogTimer();

        $('#timeoutDialog').dialog({
            title: "Session Expiring!",
            autoOpen: false,
            height: 170,
            width: 350,
            modal: true,
            buttons: {
                'Yes': function () {
                    prolongBool = true;
                    $.post("http://localhost:5562/Members/Location/Default.aspx"); 
                    refreshDialogTimer();
                    $(this).dialog("close");
                },
                Cancel: function () {
                    var originURL = document.location.origin;
                    window.location.replace(originURL + "/timeout.aspx");
                }
            },
            open: function() {
                prolongBool = false;
                $('#tickVar').text(10);
                t = 9;
                dialogCounter();
            }
        }); // end timeoutDialog
    }); //End page load
</script>

Don't forget to add the Dialog to your html:

        <div id="timeoutDialog" class='modal'>
            <form>
                <fieldset>
                    <label for="timeoutDialog">Your session will expire in</label>
                    <label for="timeoutDialog" id="tickVar">10</label>
                    <label for="timeoutDialog">seconds, would you like to renew your session?</label>
                </fieldset>
            </form>
        </div>

How can I select the record with the 2nd highest salary in database Oracle?

select Max(Salary) as SecondHighestSalary from Employee where Salary not in (select max(Salary) from Employee)

CSS :not(:last-child):after selector

Your sample does not work in IE for me, you have to specify Doctype header in your document to render your page in standard way in IE to use the content CSS property:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<head>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<html>

<ul>
    <li>One</li>
    <li>Two</li>
    <li>Three</li>
    <li>Four</li>
    <li>Five</li>
</ul>

</html>

Second way is to use CSS 3 selectors

li:not(:last-of-type):after
{
    content:           " |";
}

But you still need to specify Doctype

And third way is to use JQuery with some script like following:

<script type="text/javascript" src="jquery-1.4.1.js"></script>
<link href="style2.css" rel="stylesheet" type="text/css">
</head>
<html>

<ul>
    <li>One</li>
    <li>Two</li>
    <li>Three</li>
    <li>Four</li>
    <li>Five</li>
</ul>

<script type="text/javascript">
  $(document).ready(function () {
      $("li:not(:last)").append(" | ");
    });
</script>

Advantage of third way is that you dont have to specify doctype and jQuery will take care of compatibility.

Passing command line arguments in Visual Studio 2010?

Visual Studio 2015:

Project => Your Application Properties. Each argument can be separated using space. If you have a space in between for the same argument, put double quotes as shown in the example below.

        static void Main(string[] args)
        {
            if(args == null || args.Length == 0)
            {
                Console.WriteLine("Please specify arguments!");
            }
            else
            {
                Console.WriteLine(args[0]);     // First
                Console.WriteLine(args[1]);     // Second Argument
            }
        }

PostgreSQL wildcard LIKE for any of a list of words

You can use Postgres' SIMILAR TO operator which supports alternations, i.e.

select * from table where lower(value) similar to '%(foo|bar|baz)%';

Python: can't assign to literal

I got the same error: SyntaxError: can't assign to literal when I was trying to assign multiple variables in a single line.

I was assigning the values as shown below:

    score = 0, isDuplicate = None

When I shifted them to another line, it got resolved:

    score = 0
    isDuplicate = None

I don't know why python does not allow multiple assignments at the same line but that's how it is done.

There is one more way to asisgn it in single line ie. Separate them with a semicolon in place of comma. Check the code below:

score = 0 ; duplicate = None

How to make script execution wait until jquery is loaded

You can try onload event. It raised when all scripts has been loaded :

window.onload = function () {
   //jquery ready for use here
}

But keep in mind, that you may override others scripts where window.onload using.

Git undo local branch delete

Thanks, this worked.

git branch new_branch_name sha1

git checkout new_branch_name

//can see my old checked in files in my old branch

Update a submodule to the latest commit

None of the above answers worked for me.

This was the solution, from the parent directory run:

git submodule update --init;
cd submodule-directory;
git pull;
cd ..;
git add submodule-directory;

now you can git commit and git push

Get Root Directory Path of a PHP project

You could also use realpath.

realpath(".") returns your document root.

You can call realpath with your specific path. Note that it will NOT work if the target folder or file does not exist. In such case it will return false, which could be useful for testing if a file exists.

In my case I needed to specify a path for a new file to be written to disk, and the solution was to append the path relative to document root:

$filepath = realpath(".") . "/path/to/newfile.txt";

Hope this helps anyone.

$(this).serialize() -- How to add a value?

Instead of

 data: $(this).serialize() + '&=NonFormValue' + NonFormValue,

you probably want

 data: $(this).serialize() + '&NonFormValue=' + NonFormValue,

You should be careful to URL-encode the value of NonFormValue if it might contain any special characters.

Is there a way to access an iteration-counter in Java's for-each loop?

If you need a counter in an for-each loop you have to count yourself. There is no built in counter as far as I know.

Best way to access web camera in Java

This has been discussed on SO multiple times. Here are a few links to get you started:

SO: Capturing image from webcam in java?

SO: What is the best method to capture images from a live video device for use by a Java-based application?

openCVF applet: http://www.colorfulwolf.com/blog/2011/07/05/accessing-the-webcam-from-inside-a-java-applet/

config: http://ganeshtiwaridotcomdotnp.blogspot.in/2011/12/opencv-javacv-eclipse-project.html

ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'db'

I was brought here by a different problem. Whenever I tried to login, i got that message because instead of authenticating correctly I logged in as anonymous user. The solution to my problem was:

To see which user you are, and whose permissions you have:

select user(), current_user();

To delete the pesky anonymous user:

drop user ''@'localhost';

PHP Function with Optional Parameters

What I have done in this case is pass an array, where the key is the parameter name, and the value is the value.

$optional = array(
  "param" => $param1,
  "param2" => $param2
);

function func($required, $requiredTwo, $optional) {
  if(isset($optional["param2"])) {
    doWork();
  }
}

How can I generate an apk that can run without server with react-native?

If you get `Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES]`.

I tried using @Aditya's method of generating an unsigned APK file and installing that, but when I went to install it on my Android tablet, it gave me an error of Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES].

I imagine this is because the APK file wasn't signed and the tablet was not happy with this. So, after generating the React Native bundle file I was able to generate a signed APK file, as normal, via Android Studio.

By the way, our app is a fully functioning Android app that already exists in the Play Store and we are just adding React Native to it in bite-sized pieces, because it's awesome.

So to summarize, here were my steps:

1) Generate React Native bundle:

react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output android/<your-package-name>/src/main/assets/index.android.bu??ndle --assets-dest android/<your-package-name>/src/main/res/

2) Generate a Signed APK file from Android Studio.

3) Install Signed APK File to USB device:

adb -d install -r <path_to_signed_apk>

The -d flag just tells adb to install on the usb device attached, in the event that you have an emulator running as well. If you want to install on whatever an emulator, drop the -d flag.

4) Profit!

How to create a batch file to run cmd as administrator

Press Ctrl+Shift and double-click a shortcut to run as an elevated process.

Works from the start menu as well.

How many bytes does one Unicode character take?

Check out this Unicode code converter. For example, enter 0x2009, where 2009 is the Unicode number for thin space, in the "0x... notation" field, and click Convert. The hexadecimal number E2 80 89 (3 bytes) appears in the "UTF-8 code units" field.

Android: How to programmatically access the device serial number shown in the AVD manager (API Version 8)

This is the hardware serial number. To access it on

Android Q (>= SDK 29) android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE is required. Only system apps can require this permission. If the calling package is the device or profile owner then the READ_PHONE_STATE permission suffices.
Android 8 and later (>= SDK 26) use android.os.Build.getSerial() which requires the dangerous permission READ_PHONE_STATE. Using android.os.Build.SERIAL returns android.os.Build.UNKNOWN.
Android 7.1 and earlier (<= SDK 25) and earlier android.os.Build.SERIAL does return a valid serial.

It's unique for any device. If you are looking for possibilities on how to get/use a unique device id you should read here.

For a solution involving reflection without requiring a permission see this answer.

Animate element to auto height with jQuery

this is working and it is simplier then solutions before:

CSS:

#container{
  height:143px;  
}

.max{
  height: auto;
  min-height: 143px;
}

JS:

$(document).ready(function() {
    $("#container").click(function() {      
        if($(this).hasClass("max")) {
            $(this).removeClass("max");
        } else {
            $(this).addClass("max");
        }

    })
});

Note: This solution requires jQuery UI

MySQL - Get row number on select

Take a look at this.

Change your query to:

SET @rank=0;
SELECT @rank:=@rank+1 AS rank, itemID, COUNT(*) as ordercount
  FROM orders
  GROUP BY itemID
  ORDER BY ordercount DESC;
SELECT @rank;

The last select is your count.

python pandas remove duplicate columns

Here's a one line solution to remove columns based on duplicate column names:

df = df.loc[:,~df.columns.duplicated()]

How it works:

Suppose the columns of the data frame are ['alpha','beta','alpha']

df.columns.duplicated() returns a boolean array: a True or False for each column. If it is False then the column name is unique up to that point, if it is True then the column name is duplicated earlier. For example, using the given example, the returned value would be [False,False,True].

Pandas allows one to index using boolean values whereby it selects only the True values. Since we want to keep the unduplicated columns, we need the above boolean array to be flipped (ie [True, True, False] = ~[False,False,True])

Finally, df.loc[:,[True,True,False]] selects only the non-duplicated columns using the aforementioned indexing capability.

Note: the above only checks columns names, not column values.

Pandas conditional creation of a series/dataframe column

List comprehension is another way to create another column conditionally. If you are working with object dtypes in columns, like in your example, list comprehensions typically outperform most other methods.

Example list comprehension:

df['color'] = ['red' if x == 'Z' else 'green' for x in df['Set']]

%timeit tests:

import pandas as pd
import numpy as np

df = pd.DataFrame({'Type':list('ABBC'), 'Set':list('ZZXY')})
%timeit df['color'] = ['red' if x == 'Z' else 'green' for x in df['Set']]
%timeit df['color'] = np.where(df['Set']=='Z', 'green', 'red')
%timeit df['color'] = df.Set.map( lambda x: 'red' if x == 'Z' else 'green')

1000 loops, best of 3: 239 µs per loop
1000 loops, best of 3: 523 µs per loop
1000 loops, best of 3: 263 µs per loop

How do I access my webcam in Python?

import cv2 as cv

capture = cv.VideoCapture(0)

while True:
    isTrue,frame = capture.read()
    cv.imshow('Video',frame)
    if cv.waitKey(20) & 0xFF==ord('d'):
        break

capture.release()
cv.destroyAllWindows()

0 <-- refers to the camera , replace it with file path to read a video file

cv.waitKey(20) & 0xFF==ord('d') <-- to destroy window when key is pressed

How to convert enum value to int?

If you want the value you are assigning in the constructor, you need to add a method in the enum definition to return that value.

If you want a unique number that represent the enum value, you can use ordinal().

How do you add a Dictionary of items into another Dictionary

You can use,

func addAll(from: [String: Any], into: [String: Any]){
    from.forEach {into[$0] = $1}
}

Printing column separated by comma using Awk command line

Try:

awk -F',' '{print $3}' myfile.txt

Here in -F you are saying to awk that use "," as field separator.

IF a cell contains a string

=IFS(COUNTIF(A1,"*cats*"),"cats",COUNTIF(A1,"*22*"),"22",TRUE,"none")

OnChange event handler for radio button (INPUT type="radio") doesn't work as one value

As you can see here: http://www.w3schools.com/jsref/event_onchange.asp The onchange attribute is not supported for radio buttons.

The first SO question linked by you gives you the answer: Use the onclick event instead and check the radio button state inside of the function it triggers.

How to gzip all files in all sub-directories into one compressed file in bash

@amitchhajer 's post works for GNU tar. If someone finds this post and needs it to work on a NON GNU system, they can do this:

tar cvf - folderToCompress | gzip > compressFileName

To expand the archive:

zcat compressFileName | tar xvf -

How do I display the value of a Django form field in a template?

{{form.fields.email}}

How to install XCODE in windows 7 platform?

X-code is primarily made for OS-X or iPhone development on Mac systems. Versions for Windows are not available. However this might help!

There is no way to get Xcode on Windows; however you can use a different SDK like Corona instead although it will not use Objective-C (I believe it uses Lua). I have however heard that it is horrible to use.

Source: classroomm.com

Can't get Gulp to run: cannot find module 'gulp-util'

If you have a package.json, you can install all the current project dependencies using:

npm install

Check if a string contains another string

You wouldn't really want to do this given the existing Instr/InstrRev functions but there are times when it is handy to use EVALUATE to return the result of Excel worksheet functions within VBA

Option Explicit

Public Sub test()

    Debug.Print ContainsSubString("bc", "abc,d")

End Sub
Public Function ContainsSubString(ByVal substring As String, ByVal testString As String) As Boolean
    'substring = string to test for; testString = string to search
    ContainsSubString = Evaluate("=ISNUMBER(FIND(" & Chr$(34) & substring & Chr$(34) & ", " & Chr$(34) & testString & Chr$(34) & "))")

End Function

How do I check which version of NumPy I'm using?

You can also check if your version is using MKL with:

import numpy
numpy.show_config()

Python: Append item to list N times

For immutable data types:

l = [0] * 100
# [0, 0, 0, 0, 0, ...]

l = ['foo'] * 100
# ['foo', 'foo', 'foo', 'foo', ...]

For values that are stored by reference and you may wish to modify later (like sub-lists, or dicts):

l = [{} for x in range(100)]

(The reason why the first method is only a good idea for constant values, like ints or strings, is because only a shallow copy is does when using the <list>*<number> syntax, and thus if you did something like [{}]*100, you'd end up with 100 references to the same dictionary - so changing one of them would change them all. Since ints and strings are immutable, this isn't a problem for them.)

If you want to add to an existing list, you can use the extend() method of that list (in conjunction with the generation of a list of things to add via the above techniques):

a = [1,2,3]
b = [4,5,6]
a.extend(b)
# a is now [1,2,3,4,5,6]

X-Frame-Options: ALLOW-FROM in firefox and chrome

For Chrome, instead of

response.AppendHeader("X-Frame-Options", "ALLOW-FROM " + host);

you need to add Content-Security-Policy

string selfAuth = System.Web.HttpContext.Current.Request.Url.Authority;
string refAuth = System.Web.HttpContext.Current.Request.UrlReferrer.Authority;
response.AppendHeader("Content-Security-Policy", "default-src 'self' 'unsafe-inline' 'unsafe-eval' data: *.msecnd.net vortex.data.microsoft.com " + selfAuth + " " + refAuth);

to the HTTP-response-headers.
Note that this assumes you checked on the server whether or not refAuth is allowed.
And also, note that you need to do browser-detection in order to avoid adding the allow-from header for Chrome (outputs error on console).

For details, see my answer here.

Run a vbscript from another vbscript

Just to complete, you could send 3 arguments like this:

objShell.Run "TestScript.vbs 42 ""an arg containing spaces"" foo"

How do I clear a combobox?

How to iterate over a JSONObject?

Can't believe that there is no more simple and secured solution than using an iterator in this answers...

JSONObject names () method returns a JSONArray of the JSONObject keys, so you can simply walk though it in loop:

JSONObject object = new JSONObject ();
JSONArray keys = object.names ();

for (int i = 0; i < keys.length (); i++) {
   
   String key = keys.getString (i); // Here's your key
   String value = object.getString (key); // Here's your value
   
}

Peak detection in a 2D array

Well, here's some simple and not terribly efficient code, but for this size of a data set it is fine.

import numpy as np
grid = np.array([[0,0,0,0,0,0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0.4,0.4,0.4,0,0,0],
              [0,0,0,0,0.4,1.4,1.4,1.8,0.7,0,0,0,0,0],
              [0,0,0,0,0.4,1.4,4,5.4,2.2,0.4,0,0,0,0],
              [0,0,0.7,1.1,0.4,1.1,3.2,3.6,1.1,0,0,0,0,0],
              [0,0.4,2.9,3.6,1.1,0.4,0.7,0.7,0.4,0.4,0,0,0,0],
              [0,0.4,2.5,3.2,1.8,0.7,0.4,0.4,0.4,1.4,0.7,0,0,0],
              [0,0,0.7,3.6,5.8,2.9,1.4,2.2,1.4,1.8,1.1,0,0,0],
              [0,0,1.1,5,6.8,3.2,4,6.1,1.8,0.4,0.4,0,0,0],
              [0,0,0.4,1.1,1.8,1.8,4.3,3.2,0.7,0,0,0,0,0],
              [0,0,0,0,0,0.4,0.7,0.4,0,0,0,0,0,0]])

arr = []
for i in xrange(grid.shape[0] - 1):
    for j in xrange(grid.shape[1] - 1):
        tot = grid[i][j] + grid[i+1][j] + grid[i][j+1] + grid[i+1][j+1]
        arr.append([(i,j),tot])

best = []

arr.sort(key = lambda x: x[1])

for i in xrange(5):
    best.append(arr.pop())
    badpos = set([(best[-1][0][0]+x,best[-1][0][1]+y)
                  for x in [-1,0,1] for y in [-1,0,1] if x != 0 or y != 0])
    for j in xrange(len(arr)-1,-1,-1):
        if arr[j][0] in badpos:
            arr.pop(j)


for item in best:
    print grid[item[0][0]:item[0][0]+2,item[0][1]:item[0][1]+2]

I basically just make an array with the position of the upper-left and the sum of each 2x2 square and sort it by the sum. I then take the 2x2 square with the highest sum out of contention, put it in the best array, and remove all other 2x2 squares that used any part of this just removed 2x2 square.

It seems to work fine except with the last paw (the one with the smallest sum on the far right in your first picture), it turns out that there are two other eligible 2x2 squares with a larger sum (and they have an equal sum to each other). One of them is still selects one square from your 2x2 square, but the other is off to the left. Fortunately, by luck we see to be choosing more of the one that you would want, but this may require some other ideas to be used to get what you actually want all of the time.

React: "this" is undefined inside a component function

In my case, for a stateless component that received the ref with forwardRef, I had to do what it is said here https://itnext.io/reusing-the-ref-from-forwardref-with-react-hooks-4ce9df693dd

From this (onClick doesn't have access to the equivalent of 'this')

const Com = forwardRef((props, ref) => {
  return <input ref={ref} onClick={() => {console.log(ref.current} } />
})

To this (it works)

const useCombinedRefs = (...refs) => {
  const targetRef = React.useRef()

  useEffect(() => {
    refs.forEach(ref => {
      if (!ref) return

      if (typeof ref === 'function') ref(targetRef.current)
      else ref.current = targetRef.current
    })
  }, [refs])

  return targetRef
}

const Com = forwardRef((props, ref) => {
  const innerRef = useRef()
  const combinedRef = useCombinedRefs(ref, innerRef)

  return <input ref={combinedRef } onClick={() => {console.log(combinedRef .current} } />
})

How can I make PHP display the error instead of giving me 500 Internal Server Error

Use "php -l <filename>" (that's an 'L') from the command line to output the syntax error that could be causing PHP to throw the status 500 error. It'll output something like:

PHP Parse error: syntax error, unexpected '}' in <filename> on line 18

Instant run in Android Studio 2.0 (how to turn off)

Update August 2019

In Android Studio 3.5 Instant Run was replaced with Apply Changes. And it works in different way: APK is not modified on the fly anymore but instead runtime instrumentation is used to redefine classes on the fly (more info). So since Android Studio 3.5 instant run settings are replaced with Deployment (Settings -> Build, Execution, Deployment -> Deployment):

"message failed to fetch from registry" while trying to install any module

for raspberry pi I found and modified a solution I found
here is what I ran

sudo su -
cd /opt
wget http://nodejs.org/dist/v0.10.28/node-v0.10.28-linux-arm-pi.tar.gz
tar xvzf node-v0.10.28-linux-arm-pi.tar.gz
ln -s node-v0.10.28-linux-arm-pi node
chmod a+rw /opt/node/lib/node_modules
chmod a+rw /opt/node/bin
echo 'PATH=$PATH:/opt/node/bin' > /etc/profile.d/node.sh

the only mod I did was change all 10.25 to 10.28 which was the latest linux-arm-pi at the time

Remove the last line from a file in Bash

OK processing a good amount of data and the output was OK, but had one junk line.

If I piped the output of the script to:

| sed -i '$ d' I would get the following error and finally no output at all sed: no input files

But | head -n -1 worked!

rails simple_form - hidden field - create?

Shortest Yet !!!

=f.hidden_field :title, :value => "some value"

Shorter, DRYer and perhaps more obvious.

Of course with ruby 1.9 and the new hash format we can go 3 characters shorter with...

=f.hidden_field :title, value: "some value"

Service Reference Error: Failed to generate code for the service reference

Right click on your service reference and choose Configure Service Reference...

Configure Service Reference

Then uncheck Reuse types in referenced assemblies

Reuse Types

Click OK, clean and rebuild your solution.

How to call a SOAP web service on Android

SOAP is an ill-suited technology for use on Android (or mobile devices in general) because of the processing/parsing overhead that's required. A REST services is a lighter weight solution and that's what I would suggest. Android comes with a SAX parser, and it's fairly trivial to use. If you are absolutely required to handle/parse SOAP on a mobile device then I feel sorry for you, the best advice I can offer is just not to use SOAP.

How do I install Python 3 on an AWS EC2 instance?

On Debian derivatives such as Ubuntu, use apt. Check the apt repository for the versions of Python available to you. Then, run a command similar to the following, substituting the correct package name:

sudo apt-get install python3

On Red Hat and derivatives, use yum. Check the yum repository for the versions of Python available to you. Then, run a command similar to the following, substituting the correct package name:

sudo yum install python36

On SUSE and derivatives, use zypper. Check the repository for the versions of Python available to you. Then. run a command similar to the following, substituting the correct package name:

sudo zypper install python3

Spring Boot yaml configuration for a list of strings

@Value("#{'${your.elements}'.split(',')}")  
private Set<String> stringSet;

yml file:

your:
 elements: element1, element2, element3

There is lot more you can play with spring spEL.

How do I get LaTeX to hyphenate a word that contains a dash?

The problem (as KennyTM noted) is that LaTeX won't hyphenate words with dashes in them. Luckily, there's a standard package (part of ncctools) that addresses that very problem, called extdash. This defines new hyphen and dash commands that do not disrupt hyphenation, and which can allow or prevent line breaks at the hyphen/dash. I prefer to use it with the shortcuts option, so I can use, e.g., \-/ rather than \Hyphdash. Here's what you want:

\usepackage[shortcuts]{extdash} ... multi\-/disciplinary

To prevent breaking at that hyphen, use multi\=/disciplinary

(Aside: The Chicago Manual of Style advises dropping the hyphens attaching affixes like 'multi', unless the word is ambiguous or unintelligible without it.)

How do I remove/delete a virtualenv?

The following command works for me.

rm -rf /path/to/virtualenv

ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749)

I ran this on MacOS /Applications/Python\ 3.6/Install\ Certificates.command

What does '?' do in C++?

Just a note, if you ever see this:

a = x ? : y;

It's a GNU extension to the standard (see https://gcc.gnu.org/onlinedocs/gcc/Conditionals.html#Conditionals).

It is the same as

a = x ? x : y;

Oracle: How to filter by date and time in a where clause

Obviously '12/01/2012 13:16:32.000' doesn't match 'DD-MON-YYYY hh24:mi' format.

Update:

You need 'MM/DD/YYYY hh24:mi:ss.ff' format and to use TO_TIMESTAMP instead of TO_DATE cause dates don't hold millis in oracle.

Are duplicate keys allowed in the definition of binary search trees?

Those three things you said are all true.

Keys are unique
To the left are keys less than this one
To the right are keys greater than this one

I suppose you could reverse your tree and put the smaller keys on the right, but really the "left" and "right" concept is just that: a visual concept to help us think about a data structure which doesn't really have a left or right, so it doesn't really matter.

Why does jQuery or a DOM method such as getElementById not find the element?

When I tried your code, it worked.

The only reason that your event is not working, may be that your DOM was not ready and your button with id "event-btn" was not yet ready. And your javascript got executed and tried to bind the event with that element.

Before using the DOM element for binding, that element should be ready. There are many options to do that.

Option1: You can move your event binding code within document ready event. Like:

document.addEventListener('DOMContentLoaded', (event) => {
  //your code to bind the event
});

Option2: You can use timeout event, so that binding is delayed for few seconds. like:

setTimeout(function(){
  //your code to bind the event
}, 500);

Option3: move your javascript include to the bottom of your page.

I hope this helps you.

How to make input type= file Should accept only pdf and xls

While this particular example is for a multiple file upload, it gives the general information one needs:

https://developer.mozilla.org/en-US/docs/DOM/File.type

As far as acting upon a file upon /download/ this is not a Javascript question -- but rather a server configuration. If a user does not have something installed to open PDF or XLS files, their only choice will be to download them.

Exception in thread "main" java.lang.Error: Unresolved compilation problems

For this error:

Exception in thread "main" java.lang.Error: Unresolved compilation problems:

There are problems with your import or package name.
You can delete the package name or fix import errors

Could not resolve all dependencies for configuration ':classpath'

In the Android Studio v4.0, you should be off the Gradle offline-mode and retry to sync Gradle.

jQuery: get the file name selected from <input type="file" />

I had used following which worked correctly.

$('#fileAttached').attr('value', $('#attachment').val())

curl Failed to connect to localhost port 80

In my case, the file ~/.curlrc had a wrong proxy configured.

E: Unable to locate package mongodb-org

Try without '-org':

sudo apt-get install -y mongodb

Worked for me!

Introducing FOREIGN KEY constraint may cause cycles or multiple cascade paths - why?

In .NET Core I played with all upper answers - but without any success. I made changes a lot in DB structure and every time added new migration attempting to update-database, but received the same error.

Then I started to remove-migration one by one until Package Manager Console threw me exception:

The migration '20170827183131_***' has already been applied to the database

After that, I added new migration (add-migration) and update-database successfully

So my suggestion would be: clear out all your temp migrations, until your current DB state.

Change :hover CSS properties with JavaScript

I'd recommend to replace all :hover properties to :active when you detect that device supports touch. Just call this function when you do so as touch()

   function touch() {
      if ('ontouchstart' in document.documentElement) {
        for (var sheetI = document.styleSheets.length - 1; sheetI >= 0; sheetI--) {
          var sheet = document.styleSheets[sheetI];
          if (sheet.cssRules) {
            for (var ruleI = sheet.cssRules.length - 1; ruleI >= 0; ruleI--) {
              var rule = sheet.cssRules[ruleI];

              if (rule.selectorText) {
                rule.selectorText = rule.selectorText.replace(':hover', ':active');
              }
            }
          }
        }
      }
    }

Converting Dictionary to List?

You should use dict.items().

Here is a one liner solution for your problem:

[(k,v) for k,v in dict.items()]

and result:

[('Food', 'Fish&Chips'), ('2012', 'Olympics'), ('Capital', 'London')]

or you can do

l=[]
[l.extend([k,v]) for k,v in dict.items()]

for:

['Food', 'Fish&Chips', '2012', 'Olympics', 'Capital', 'London']

Convert char to int in C and C++

Use static_cast<int>:

int num = static_cast<int>(letter); // if letter='a', num=97

Edit: You probably should try to avoid to use ~~(int)~~

~~int num = (int) letter;~~

check out Why use static_cast<int>(x) instead of (int)x? for more info.

Equivalent of "continue" in Ruby

Inside for-loops and iterator methods like each and map the next keyword in ruby will have the effect of jumping to the next iteration of the loop (same as continue in C).

However what it actually does is just to return from the current block. So you can use it with any method that takes a block - even if it has nothing to do with iteration.

How do I get logs from all pods of a Kubernetes replication controller?

You can get help from kubectl logs -h and according the info,

kubectl logs -f deployment/myapp -c myapp --tail 100

-c is the container name and --tail will show the latest num lines,but this will choose one pod of the deployment, not all pods. This is something you have to bear in mind.

kubectl logs -l app=myapp -c myapp --tail 100

If you want to show logs of all pods, you can use -l and specify a lable, but at the same time -f won't be used.

Is there a null-coalescing (Elvis) operator or safe navigation operator in javascript?

Jumping in very late, there's a proposal[1] for optional chaining currently at stage 2, with a babel plugin[2] available. It's not currently in any browser I am aware of.

Wavy shape with css

I'm not sure it's your shape but it's close - you can play with the values:

https://jsfiddle.net/7fjSc/9/

_x000D_

#wave {_x000D_
  position: relative;_x000D_
  height: 70px;_x000D_
  width: 600px;_x000D_
  background: #e0efe3;_x000D_
}_x000D_
#wave:before {_x000D_
  content: "";_x000D_
  display: block;_x000D_
  position: absolute;_x000D_
  border-radius: 100% 50%;_x000D_
  width: 340px;_x000D_
  height: 80px;_x000D_
  background-color: white;_x000D_
  right: -5px;_x000D_
  top: 40px;_x000D_
}_x000D_
#wave:after {_x000D_
  content: "";_x000D_
  display: block;_x000D_
  position: absolute;_x000D_
  border-radius: 100% 50%;_x000D_
  width: 300px;_x000D_
  height: 70px;_x000D_
  background-color: #e0efe3;_x000D_
  left: 0;_x000D_
  top: 27px;_x000D_
}

_x000D_

<div id="wave"></div>

_x000D_

Iteration over std::vector: unsigned vs signed index variable

In C++11

I would use general algorithms like for_each to avoid searching for the right type of iterator and lambda expression to avoid extra named functions/objects.

The short "pretty" example for your particular case (assuming polygon is a vector of integers):

for_each(polygon.begin(), polygon.end(), [&sum](int i){ sum += i; });

tested on: http://ideone.com/i6Ethd

Dont' forget to include: algorithm and, of course, vector :)

Microsoft has actually also a nice example on this:
source: http://msdn.microsoft.com/en-us/library/dd293608.aspx

#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

int main() 
{
   // Create a vector object that contains 10 elements.
   vector<int> v;
   for (int i = 1; i < 10; ++i) {
      v.push_back(i);
   }

   // Count the number of even numbers in the vector by 
   // using the for_each function and a lambda.
   int evenCount = 0;
   for_each(v.begin(), v.end(), [&evenCount] (int n) {
      cout << n;
      if (n % 2 == 0) {
         cout << " is even " << endl;
         ++evenCount;
      } else {
         cout << " is odd " << endl;
      }
   });

   // Print the count of even numbers to the console.
   cout << "There are " << evenCount 
        << " even numbers in the vector." << endl;
}

How to compile .c file with OpenSSL includes?

Use the -I flag to gcc properly.

gcc -I/path/to/openssl/ -o Opentest -lcrypto Opentest.c

The -I should point to the directory containing the openssl folder.

Open a folder using Process.Start

Do you have a lot of applications running when you are trying this? I encounter weird behavior at work sometimes because my system runs out of GDI Handles as I have so many windows open (our apps use alot).

When this happens, windows and context menus no long appear until I close something to free up some GDI handles.

The default limit in XP and Vista is 10000. It is not uncommon for my DevStudio to have 1500 GDI handles, so if you have a couple of copies of Dev studio open, it can eat them up pretty quickly. You can add a column in TaskManager to see how many handles are being used by each process.

There is a registry tweak you can do to increase the limit.

For more information see http://msdn.microsoft.com/en-us/library/ms724291(VS.85).aspx

How do I start PowerShell from Windows Explorer?

By adding the registry keys below, in Windows 10, I managed to get the Open PowerShell Here option in my SHIFT + RClick context menus. Just copy these into a blank notepad file then save as a .reg file and run the file to add the key and it should work from there. Some of these other answers say to add the key into HKCR\Directory\shell but I found that for me it only worked with the keys going into HKLM\SOFTWARE\Classes\Directory\shell

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\background\shell\powershell]
"Extended"=""
"NoWorkingDirectory"=""
@="Open PowerShell here"
"Icon"="%SystemRoot%\\system32\\WindowsPowerShell\\v1.0\\powershell.exe"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\background\shell\powershell\command]
@="C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\powershell.exe -NoExit -Command Set-Location -LiteralPath '%V'"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\shell\powershell]
@="Open PowerShell here"
"Extended"=""
"Icon"="%SystemRoot%\\system32\\WindowsPowerShell\\v1.0\\powershell.exe"
"NoWorkingDirectory"=""

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\shell\powershell\command]
@="C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\powershell.exe -NoExit -Command Set-Location -LiteralPath '%V'"

Print a file, skipping the first X lines, in Bash

A less verbose version with AWK:

awk 'NR > 1e6' myfile.txt

But I would recommend using integer numbers.

Convert Go map to json

It actually tells you what's wrong, but you ignored it because you didn't check the error returned from json.Marshal.

json: unsupported type: map[int]main.Foo

JSON spec doesn't support anything except strings for object keys, while javascript won't be fussy about it, it's still illegal.

You have two options:

1 Use map[string]Foo and convert the index to string (using fmt.Sprint for example):

datas := make(map[string]Foo, N)

for i := 0; i < 10; i++ {
    datas[fmt.Sprint(i)] = Foo{Number: 1, Title: "test"}
}
j, err := json.Marshal(datas)
fmt.Println(string(j), err)

2 Simply just use a slice (javascript array):

datas2 := make([]Foo, N)
for i := 0; i < 10; i++ {
    datas2[i] = Foo{Number: 1, Title: "test"}
}
j, err = json.Marshal(datas2)
fmt.Println(string(j), err)

playground

Python Variable Declaration

For scoping purpose, I use:

custom_object = None

how to increase sqlplus column output length?

None of these suggestions were working for me. I finally found something else I could do - dbms_output.put_line. For example:

SET SERVEROUTPUT ON
begin
for i in (select dbms_metadata.get_ddl('INDEX', index_name, owner) as ddl from all_indexes where owner = 'MYUSER') loop
  dbms_output.put_line(i.ddl);
end loop;
end;
/

Boom. It printed out everything I wanted - no truncating or anything like that. And that works straight in sqlplus - no need to put it in a separate file or anything.

Getting absolute URLs using ASP.NET Core

If you just want to convert a relative path with optional parameters I created an extension method for IHttpContextAccessor

public static string AbsoluteUrl(this IHttpContextAccessor httpContextAccessor, string relativeUrl, object parameters = null)
{
    var request = httpContextAccessor.HttpContext.Request;

    var url = new Uri(new Uri($"{request.Scheme}://{request.Host.Value}"), relativeUrl).ToString();

    if (parameters != null)
    {
        url = Microsoft.AspNetCore.WebUtilities.QueryHelpers.AddQueryString(url, ToDictionary(parameters));
    }

    return url;
}


private static Dictionary<string, string> ToDictionary(object obj)
{
    var json = JsonConvert.SerializeObject(obj);
    return JsonConvert.DeserializeObject<Dictionary<string, string>>(json);
}

You can then call the method from your service/view using the injected IHttpContextAccessor

var callbackUrl = _httpContextAccessor.AbsoluteUrl("/Identity/Account/ConfirmEmail", new { userId = applicationUser.Id, code });

SELECT COUNT in LINQ to SQL C#

Like that

var purchCount = (from purchase in myBlaContext.purchases select purchase).Count();

or even easier

var purchCount = myBlaContext.purchases.Count()

OSError: [Errno 8] Exec format error

Have you tried this?

Out = subprocess.Popen('/usr/local/bin/script hostname = actual_server_name -p LONGLIST'.split(), shell=False,stdout=subprocess.PIPE,stderr=subprocess.PIPE)

Edited per the apt comment from @J.F.Sebastian

socket.shutdown vs socket.close

there are some flavours of shutdown: http://msdn.microsoft.com/en-us/library/system.net.sockets.socket.shutdown.aspx. *nix is similar.

How is an HTTP POST request made in node.js?

By using request dependency.

Simple solution :

 import request from 'request'
 var data = {
        "host":"127.1.1.1",
        "port":9008
    }

request.post( baseUrl + '/peers/connect',
        {
            json: data,  // your payload data placed here
            headers: {
                'X-Api-Key': 'dajzmj6gfuzmbfnhamsbuxivc', // if authentication needed
                'Content-Type': 'application/json' 
            }
        }, function (error, response, body) {
            if (error) {
                callback(error, null)
            } else {
                callback(error, response.body)
            }
        });

The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value

You can also fix this problem by adding to model (Entity Framework version >= 5)

[DatabaseGenerated(DatabaseGeneratedOption.Computed)]
public DateTime CreationDate { get; set; }

"Insert if not exists" statement in SQLite

For a unique column, use this:

INSERT OR REPLACE INTO table () values();

For more information, see: sqlite.org/lang_insert

Programs & Examples On #Persistence manager

Resize external website content to fit iFrame width

React component not re-rendering on state change

How to get subarray from array?

How do I create a sequence in MySQL?

How to resize a custom view programmatically?

Where is Xcode's build folder?

How to draw checkbox or tick mark in GitHub Markdown table?

bash string equality

css divide width 100% to 3 column

Detect Safari using jQuery

Iterate over values of object

Getting rid of all the rounded corners in Twitter Bootstrap

Log.INFO vs. Log.DEBUG

Date to milliseconds and back to date in Swift

GDB: Listing all mapped memory regions for a crashed process

How do I compile a Visual Studio project from the command-line?

Uint8Array to string in Javascript

open link of google play store in mobile version android

How to add \newpage in Rmarkdown in a smart way?

How to validate an email address in JavaScript

How can I use xargs to copy files that have spaces and quotes in their names?

Laravel-5 'LIKE' equivalent (Eloquent)

How can I read Chrome Cache files?

JQuery to load Javascript file dynamically

Difference between /res and /assets directories

What is the LDF file in SQL Server?

C# listView, how do I add items to columns 2, 3 and 4 etc?

Reading CSV file and storing values into an array

How do I implement a callback in PHP?

Calculate the display width of a string in Java

Verify host key with pysftp

Add Insecure Registry to Docker

How do you replace all the occurrences of a certain character in a string?

Why should hash functions use a prime number modulus?

How to add a char/int to an char array in C?

Insert multiple rows with one query MySQL

How to properly insert multiple rows using PDO

How to properly insert multiple rows using mysqli

Performance

What is AF_INET, and why do I need it?

How to refresh Android listview?

Insert HTML with React Variable Statements (JSX)

How to make a PHP SOAP call using the SoapClient class

How to break out of multiple loops?

'this' implicitly has type 'any' because it does not have a type annotation

How to import a new font into a project - Angular 5

How to detect IE11?

Is there an R function for finding the index of an element in a vector?

PHP ini file_get_contents external url

How to set JFrame to appear centered, regardless of monitor resolution?

SSH Private Key Permissions using Git GUI or ssh-keygen are too open

Observable.of is not a function

How to access the GET parameters after "?" in Express?

How to use executeReader() method to retrieve the value of just one cell

How to find item with max value using linq?

Color Tint UIButton Image

HTML 5: Is it <br>, <br/>, or <br />?

twitter bootstrap autocomplete dropdown / combobox with Knockoutjs

pretty-print JSON using JavaScript

How to Flatten a Multidimensional Array?

How can I increase the size of a bootstrap button?

python date of the previous month

How to format x-axis time scale values in Chart.js v2

How to check whether an object is a date?

How do I change the root directory of an Apache server?

how do I get a new line, after using float:left?

jquery input select all on focus

Split array into two parts without for loop in java

How to rename a single column in a data.frame?

MySQL JOIN the most recent row only?

How to multiply values using SQL

Handling multiple IDs in jQuery

Solution:

Count number of 1's in binary representation

How to kill a nodejs process in Linux?

.NET - Get protocol, host, and port

Select box arrow style

jQuery addClass onClick

How to parse XML in Bash?

If you get `Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES]`.