StringBuilder is faster than StringBuffer because it's not synchronized.

Here's a simple benchmark test:

public class Main {
    public static void main(String[] args) {
        int N = 77777777;
        long t;

        {
            StringBuffer sb = new StringBuffer();
            t = System.currentTimeMillis();
            for (int i = N; i --> 0 ;) {
                sb.append("");
            }
            System.out.println(System.currentTimeMillis() - t);
        }

        {
            StringBuilder sb = new StringBuilder();
            t = System.currentTimeMillis();
            for (int i = N; i > 0 ; i--) {
                sb.append("");
            }
            System.out.println(System.currentTimeMillis() - t);
        }
    }
}

A test run gives the numbers of 2241 ms for StringBuffer vs 753 ms for StringBuilder.

A formal analysis has been done by Phil Rogaway in 2011, here. Section 1.6 gives a summary that I transcribe here, adding my own emphasis in bold (if you are impatient, then his recommendation is use CTR mode, but I suggest that you read my paragraphs about message integrity versus encryption below).

Note that most of these require the IV to be random, which means non-predictable and therefore should be generated with cryptographic security. However, some require only a "nonce", which does not demand that property but instead only requires that it is not re-used. Therefore designs that rely on a nonce are less error prone than designs that do not (and believe me, I have seen many cases where CBC is not implemented with proper IV selection). So you will see that I have added bold when Rogaway says something like "confidentiality is not achieved when the IV is a nonce", it means that if you choose your IV cryptographically secure (unpredictable), then no problem. But if you do not, then you are losing the good security properties. Never re-use an IV for any of these modes.

Also, it is important to understand the difference between message integrity and encryption. Encryption hides data, but an attacker might be able to modify the encrypted data, and the results can potentially be accepted by your software if you do not check message integrity. While the developer will say "but the modified data will come back as garbage after decryption", a good security engineer will find the probability that the garbage causes adverse behaviour in the software, and then he will turn that analysis into a real attack. I have seen many cases where encryption was used but message integrity was really needed more than the encryption. Understand what you need.

I should say that although GCM has both encryption and message integrity, it is a very fragile design: if you re-use an IV, you are screwed -- the attacker can recover your key. Other designs are less fragile, so I personally am afraid to recommend GCM based upon the amount of poor encryption code that I have seen in practice.

If you need both, message integrity and encryption, you can combine two algorithms: usually we see CBC with HMAC, but no reason to tie yourself to CBC. The important thing to know is encrypt first, then MAC the encrypted content, not the other way around. Also, the IV needs to be part of the MAC calculation.

I am not aware of IP issues.

Now to the good stuff from Professor Rogaway:

Block ciphers modes, encryption but not message integrity

ECB: A blockcipher, the mode enciphers messages that are a multiple of n bits by separately enciphering each n-bit piece. The security properties are weak, the method leaking equality of blocks across both block positions and time. Of considerable legacy value, and of value as a building block for other schemes, but the mode does not achieve any generally desirable security goal in its own right and must be used with considerable caution; ECB should not be regarded as a “general-purpose” confidentiality mode.

CBC: An IV-based encryption scheme, the mode is secure as a probabilistic encryption scheme, achieving indistinguishability from random bits, assuming a random IV. Confidentiality is not achieved if the IV is merely a nonce, nor if it is a nonce enciphered under the same key used by the scheme, as the standard incorrectly suggests to do. Ciphertexts are highly malleable. No chosen ciphertext attack (CCA) security. Confidentiality is forfeit in the presence of a correct-padding oracle for many padding methods. Encryption inefficient from being inherently serial. Widely used, the mode’s privacy-only security properties result in frequent misuse. Can be used as a building block for CBC-MAC algorithms. I can identify no important advantages over CTR mode.

CFB: An IV-based encryption scheme, the mode is secure as a probabilistic encryption scheme, achieving indistinguishability from random bits, assuming a random IV. Confidentiality is not achieved if the IV is predictable, nor if it is made by a nonce enciphered under the same key used by the scheme, as the standard incorrectly suggests to do. Ciphertexts are malleable. No CCA-security. Encryption inefficient from being inherently serial. Scheme depends on a parameter s, 1 = s = n, typically s = 1 or s = 8. Inefficient for needing one blockcipher call to process only s bits . The mode achieves an interesting “self-synchronization” property; insertion or deletion of any number of s-bit characters into the ciphertext only temporarily disrupts correct decryption.

OFB: An IV-based encryption scheme, the mode is secure as a probabilistic encryption scheme, achieving indistinguishability from random bits, assuming a random IV. Confidentiality is not achieved if the IV is a nonce, although a fixed sequence of IVs (eg, a counter) does work fine. Ciphertexts are highly malleable. No CCA security. Encryption and decryption inefficient from being inherently serial. Natively encrypts strings of any bit length (no padding needed). I can identify no important advantages over CTR mode.

CTR: An IV-based encryption scheme, the mode achieves indistinguishability from random bits assuming a nonce IV. As a secure nonce-based scheme, the mode can also be used as a probabilistic encryption scheme, with a random IV. Complete failure of privacy if a nonce gets reused on encryption or decryption. The parallelizability of the mode often makes it faster, in some settings much faster, than other confidentiality modes. An important building block for authenticated-encryption schemes. Overall, usually the best and most modern way to achieve privacy-only encryption.

XTS: An IV-based encryption scheme, the mode works by applying a tweakable blockcipher (secure as a strong-PRP) to each n-bit chunk. For messages with lengths not divisible by n, the last two blocks are treated specially. The only allowed use of the mode is for encrypting data on a block-structured storage device. The narrow width of the underlying PRP and the poor treatment of fractional final blocks are problems. More efficient but less desirable than a (wide-block) PRP-secure blockcipher would be.

MACs (message integrity but not encryption)

ALG1–6: A collection of MACs, all of them based on the CBC-MAC. Too many schemes. Some are provably secure as VIL PRFs, some as FIL PRFs, and some have no provable security. Some of the schemes admit damaging attacks. Some of the modes are dated. Key-separation is inadequately attended to for the modes that have it. Should not be adopted en masse, but selectively choosing the “best” schemes is possible. It would also be fine to adopt none of these modes, in favor of CMAC. Some of the ISO 9797-1 MACs are widely standardized and used, especially in banking. A revised version of the standard (ISO/IEC FDIS 9797-1:2010) will soon be released [93].

CMAC: A MAC based on the CBC-MAC, the mode is provably secure (up to the birthday bound) as a (VIL) PRF (assuming the underlying blockcipher is a good PRP). Essentially minimal overhead for a CBCMAC-based scheme. Inherently serial nature a problem in some application domains, and use with a 64-bit blockcipher would necessitate occasional re-keying. Cleaner than the ISO 9797-1 collection of MACs.

HMAC: A MAC based on a cryptographic hash function rather than a blockcipher (although most cryptographic hash functions are themselves based on blockciphers). Mechanism enjoys strong provable-security bounds, albeit not from preferred assumptions. Multiple closely-related variants in the literature complicate gaining an understanding of what is known. No damaging attacks have ever been suggested. Widely standardized and used.

GMAC: A nonce-based MAC that is a special case of GCM. Inherits many of the good and bad characteristics of GCM. But nonce-requirement is unnecessary for a MAC, and here it buys little benefit. Practical attacks if tags are truncated to = 64 bits and extent of decryption is not monitored and curtailed. Complete failure on nonce-reuse. Use is implicit anyway if GCM is adopted. Not recommended for separate standardization.

authenticated encryption (both encryption and message integrity)

CCM: A nonce-based AEAD scheme that combines CTR mode encryption and the raw CBC-MAC. Inherently serial, limiting speed in some contexts. Provably secure, with good bounds, assuming the underlying blockcipher is a good PRP. Ungainly construction that demonstrably does the job. Simpler to implement than GCM. Can be used as a nonce-based MAC. Widely standardized and used.

GCM: A nonce-based AEAD scheme that combines CTR mode encryption and a GF(2128)-based universal hash function. Good efficiency characteristics for some implementation environments. Good provably-secure results assuming minimal tag truncation. Attacks and poor provable-security bounds in the presence of substantial tag truncation. Can be used as a nonce-based MAC, which is then called GMAC. Questionable choice to allow nonces other than 96-bits. Recommend restricting nonces to 96-bits and tags to at least 96 bits. Widely standardized and used.

Git 101:

git is a decentralized version control system. You do not necessary need a server to get up and running with git. Still you might want to do that as it looks cool, right? (It's also useful if you want to work on a single project from multiple computers.)

So to get a "server" running you need to run git init --bare <your_project>.git as this will create an empty repository, which you can then import on your machines without having to muck around in config files in your .git dir.

After this you could clone the repo on your clients as it is supposed to work, but I found that some clients (namely git-gui) will fail to clone a repo that is completely empty. To work around this you need to run cd <your_project>.git && touch <some_random_file> && git add <some_random_file> && git commit && git push origin master. (Note that you might need to configure your username and email for that machine's git if you hadn't done so in the past. The actual commands to run will be in the error message you get so I'll just omit them.)

So at this point you can clone the repository to any machine simply by running git clone <user>@<server>:<relative_path><your_project>.git. (As others have pointed out you might need to prefix it with ssh:// if you use the absolute path.) This assumes that you can already log in from your client to the server. (You'll also get bonus points for setting up a config file and keys for ssh, if you intend to push a lot of stuff to the remote server.)

Some relevant links:
This pretty much tells you what you need to know.
And this is for those who know the basic workings of git but sometimes forget the exact syntax.

The concise version:

String dateStr = "06/27/2007";
DateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
Date startDate = (Date)formatter.parse(dateStr);  

Add a try/catch block for a ParseException to ensure the format is a valid date.

pg_hba.conf entry define login methods by IP addresses. You need to show the relevant portion of pg_hba.conf in order to get proper help.

Change this line:

host    all             all             <my-ip-address>/32        md5

To reflect your local network settings. So, if your IP is 192.168.16.78 (class C) with a mask of 255.255.255.0, then put this:

host    all             all             192.168.16.0/24        md5

Make sure your WINDOWS MACHINE is in that network 192.168.16.0 and try again.

>>> L = [0,10,20,40]
>>> L[::-1]
[40, 20, 10, 0]

Extended slice syntax is explained well in the Python What's new Entry for release 2.3.5

By special request in a comment this is the most current slice documentation.

Most other answers are either incomplete or don't deal with stuff coming after the path (query string/hash).

readonly static Uri SomeBaseUri = new Uri("http://canbeanything");

static string GetFileNameFromUrl(string url)
{
    Uri uri;
    if (!Uri.TryCreate(url, UriKind.Absolute, out uri))
        uri = new Uri(SomeBaseUri, url);

    return Path.GetFileName(uri.LocalPath);
}

Test results:

GetFileNameFromUrl("");                                         // ""
GetFileNameFromUrl("test");                                     // "test"
GetFileNameFromUrl("test.xml");                                 // "test.xml"
GetFileNameFromUrl("/test.xml");                                // "test.xml"
GetFileNameFromUrl("/test.xml?q=1");                            // "test.xml"
GetFileNameFromUrl("/test.xml?q=1&x=3");                        // "test.xml"
GetFileNameFromUrl("test.xml?q=1&x=3");                         // "test.xml"
GetFileNameFromUrl("http://www.a.com/test.xml?q=1&x=3");        // "test.xml"
GetFileNameFromUrl("http://www.a.com/test.xml?q=1&x=3#aidjsf"); // "test.xml"
GetFileNameFromUrl("http://www.a.com/a/b/c/d");                 // "d"
GetFileNameFromUrl("http://www.a.com/a/b/c/d/e/");              // ""

Call the method onCreate. For example onCreate(null);

Switch to some other branch and delete Test_Branch, as follows:

$ git checkout master
$ git branch -d Test_Branch

If above command gives you error - The branch 'Test_Branch' is not fully merged. If you are sure you want to delete it and still you want to delete it, then you can force delete it using -D instead of -d, as:

$ git branch -D Test_Branch

To delete Test_Branch from remote as well, execute:

git push origin --delete Test_Branch

Did you check the small Mousetrap library?

Mousetrap is a simple library for handling keyboard shortcuts in JavaScript.

Just list an alternaitve solution here, the Advertising ID:

https://support.google.com/googleplay/android-developer/answer/6048248?hl=en

Copied from the link above:

The advertising ID is a unique, user-resettable ID for advertising, provided by Google Play services. It gives users better controls and provides developers with a simple, standard system to continue to monetize their apps. It enables users to reset their identifier or opt out of personalized ads (formerly known as interest-based ads) within Google Play apps.

The limitations are:

1. Google Play enabled devices only.
2. Privacy Policy: https://support.google.com/googleplay/android-developer/answer/113469?hl=en&rd=1#privacy

You could use replicate or sapply:

R> colMeans(replicate(10000, sample(100, size=815, replace=TRUE, prob=NULL))) R> sapply(seq_len(10000), function(...) mean(sample(100, size=815, replace=TRUE, prob=NULL))) 

replicate is a wrapper for the common use of sapply for repeated evaluation of an expression (which will usually involve random number generation).

 (you have cv::Mat old)
 IplImage copy = old;
 IplImage* new_image = ©

you work with new as an originally declared IplImage*.

Also works in Wampserver. Click on the Green Wampserver Icon, choose MySql, then my.ini. This will allow you to open the my.ini file. Then -

1. look up for: # The MySQL server [mysqld]
2. add this right below it: lower_case_table_names = 2
3. save the file and restart MySQL service

Important Note - add the lower_case_table_names = 2 statement NOT under the [mysql] statement, but under the [mysqld] statement

Reference - http://doc.silverstripe.org/framework/en/installation/windows-wamp

The simplest way

const FPS = 30;
let lastTimestamp = 0;


function update(timestamp) {
  requestAnimationFrame(update);
  if (timestamp - lastTimestamp < 1000 / FPS) return;
  
  
   /* <<< PUT YOUR CODE HERE >>>  */

 
  lastTimestamp = timestamp;
}


update();

The following is an example of using SharedPreferences to achieve a 'forWhat' check.

    preferences = PreferenceManager.getDefaultSharedPreferences(context);
    preferencesEditor = preferences.edit();
public static boolean isFirstRun(String forWhat) {
    if (preferences.getBoolean(forWhat, true)) {
        preferencesEditor.putBoolean(forWhat, false).commit();
        return true;
    } else {
        return false;
    }
}

Delete Multiple checkbox using PHP Code

<input type="checkbox" name="chkbox[]  value=".$row[0]."/>
<input type="submit" name="delete" value="delete"/>
<?php
if(isset($_POST['delete']))
{
 $cnt=array();
 $cnt=count($_POST['chkbox']);
 for($i=0;$i<$cnt;$i++)
  {
     $del_id=$_POST['chkbox'][$i];
     $query="delete from $tablename where Id=".$del_id;
     mysql_query($query);
  }
}

Here is a simple way without stragg or creating a function.

create table countries ( country_name varchar2 (100));

insert into countries values ('Albania');

insert into countries values ('Andorra');

insert into countries values ('Antigua');


SELECT SUBSTR (SYS_CONNECT_BY_PATH (country_name , ','), 2) csv
      FROM (SELECT country_name , ROW_NUMBER () OVER (ORDER BY country_name ) rn,
                   COUNT (*) OVER () cnt
              FROM countries)
     WHERE rn = cnt
START WITH rn = 1
CONNECT BY rn = PRIOR rn + 1;

CSV                                                                             
--------------------------
Albania,Andorra,Antigua                                                         

1 row selected.

As others have mentioned, if you are on 11g R2 or greater, you can now use listagg which is much simpler.

select listagg(country_name,', ') within group(order by country_name) csv
  from countries;

CSV                                                                             
--------------------------
Albania, Andorra, Antigua

1 row selected.

You cannot concatenate multiple fields with a string. You need to select a field instand of all (*).

Steps to solve problem in android studio

1. Click on file and select a other setting from dropdown menu and then select default setting.

2. Select build,Execution,Deployment option.

3. Select Compiler

4. Here add a following line in Additional build process VM option

   -Xmx3072m -XX:MaxPermSize=524m as shown in below figure. 
   

using Array.prototype.reduce():

const arrayOfObjects = [
  { plants: 'men' },
  { smart:'dumb' },
  { peace: 'war' }
]
const sentence = 'plants are smart'

arrayOfObjects.reduce(
  (f, s) => `${f}`.replace(Object.keys(s)[0], s[Object.keys(s)[0]]), sentence
)

// as a reusable function
const replaceManyStr = (obj, sentence) => obj.reduce((f, s) => `${f}`.replace(Object.keys(s)[0], s[Object.keys(s)[0]]), sentence)

const result = replaceManyStr(arrayOfObjects , sentence1)

Example

// /////////////    1. replacing using reduce and objects_x000D_
_x000D_
// arrayOfObjects.reduce((f, s) => `${f}`.replace(Object.keys(s)[0], s[Object.keys(s)[0]]), sentence)_x000D_
_x000D_
// replaces the key in object with its value if found in the sentence_x000D_
// doesn't break if words aren't found_x000D_
_x000D_
// Example_x000D_
_x000D_
const arrayOfObjects = [_x000D_
  { plants: 'men' },_x000D_
  { smart:'dumb' },_x000D_
  { peace: 'war' }_x000D_
]_x000D_
const sentence1 = 'plants are smart'_x000D_
const result1 = arrayOfObjects.reduce((f, s) => `${f}`.replace(Object.keys(s)[0], s[Object.keys(s)[0]]), sentence1)_x000D_
_x000D_
console.log(result1)_x000D_
_x000D_
// result1: _x000D_
// men are dumb_x000D_
_x000D_
_x000D_
// Extra: string insertion python style with an array of words and indexes_x000D_
_x000D_
// usage_x000D_
_x000D_
// arrayOfWords.reduce((f, s, i) => `${f}`.replace(`{${i}}`, s), sentence)_x000D_
_x000D_
// where arrayOfWords has words you want to insert in sentence_x000D_
_x000D_
// Example_x000D_
_x000D_
// replaces as many words in the sentence as are defined in the arrayOfWords_x000D_
// use python type {0}, {1} etc notation_x000D_
_x000D_
// five to replace_x000D_
const sentence2 = '{0} is {1} and {2} are {3} every {5}'_x000D_
_x000D_
// but four in array? doesn't break_x000D_
const words2 = ['man','dumb','plants','smart']_x000D_
_x000D_
// what happens ?_x000D_
const result2 = words2.reduce((f, s, i) => `${f}`.replace(`{${i}}`, s), sentence2)_x000D_
_x000D_
console.log(result2)_x000D_
_x000D_
// result2: _x000D_
// man is dumb and plants are smart every {5}_x000D_
_x000D_
// replaces as many words as are defined in the array_x000D_
// three to replace_x000D_
const sentence3 = '{0} is {1} and {2}'_x000D_
_x000D_
// but five in array_x000D_
const words3 = ['man','dumb','plant','smart']_x000D_
_x000D_
// what happens ? doesn't break_x000D_
const result3 = words3.reduce((f, s, i) => `${f}`.replace(`{${i}}`, s), sentence3)_x000D_
_x000D_
console.log(result3)_x000D_
_x000D_
// result3: _x000D_
// man is dumb and plants

If you wish to inject pure function, instead of text, you can use this method:

function inject(){_x000D_
    document.body.style.backgroundColor = 'blue';_x000D_
}_x000D_
_x000D_
// this includes the function as text and the barentheses make it run itself._x000D_
var actualCode = "("+inject+")()"; _x000D_
_x000D_
document.documentElement.setAttribute('onreset', actualCode);_x000D_
document.documentElement.dispatchEvent(new CustomEvent('reset'));_x000D_
document.documentElement.removeAttribute('onreset');

And you can pass parameters (unfortunatelly no objects and arrays can be stringifyed) to the functions. Add it into the baretheses, like so:

function inject(color){_x000D_
    document.body.style.backgroundColor = color;_x000D_
}_x000D_
_x000D_
// this includes the function as text and the barentheses make it run itself._x000D_
var color = 'yellow';_x000D_
var actualCode = "("+inject+")("+color+")"; 

In my case, if I remove the the contentType, I get the Internal Server Error.

This is what I got working after multiple attempts:

var request =  $.ajax({
    type: 'POST',
    url: '/ControllerName/ActionName' ,
    contentType: 'application/json; charset=utf-8',
    data: JSON.stringify({ projId: 1, userId:1 }), //hard-coded value used for simplicity
    dataType: 'json'
});

request.done(function(msg) {
    alert(msg);
});

request.fail(function (jqXHR, textStatus, errorThrown) {
    alert("Request failed: " + jqXHR.responseStart +"-" + textStatus + "-" + errorThrown);
});

And this is the controller code:

public JsonResult ActionName(int projId, int userId)
{
    var obj = new ClassName();

    var result = obj.MethodName(projId, userId); // variable used for readability
    return Json(result, JsonRequestBehavior.AllowGet);
}

Please note, the case of ASP.NET is little different, we have to apply JSON.stringify() to the data as mentioned in the update of this answer.

If you want the overflowing text in the div to automatically newline instead of being hidden or making a scrollbar, use the

word-wrap: break-word

property.

A couple of answers already mention that moment-timezone is the way to go with named timezone. I just want to clarify something about this library that was pretty confusing to me. There is a difference between these two statements:

moment.tz(date, format, timezone)

moment(date, format).tz(timezone)

Assuming that a timezone is not specified in the date passed in:

The first code takes in the date and assumes the timezone is the one passed in. The second one will take date, assume the timezone from the browser and then change the time and timezone according to the timezone passed in.

Example:

moment.tz('2018-07-17 19:00:00', 'YYYY-MM-DD HH:mm:ss', 'UTC').format() // "2018-07-17T19:00:00Z"

moment('2018-07-17 19:00:00', 'YYYY-MM-DD HH:mm:ss').tz('UTC').format() // "2018-07-18T00:00:00Z"

My timezone is +5 from utc. So in the first case it does not change and it sets the date and time to have utc timezone.

In the second case, it assumes the date passed in is in -5, then turns it into UTC, and that's why it spits out the date "2018-07-18T00:00:00Z"

NOTE: The format parameter is really important. If omitted moment might fall back to the Date class which can unpredictable behaviors

Assuming the timezone is specified in the date passed in:

In this case they both behave equally

Even though now I understand why it works that way, I thought this was a pretty confusing feature and worth explaining.

Use this format: ${__time(yyyy-MM-dd'T'hh:mm:ss.SS'Z')}

Which will give you: 2018-01-16T08:32:28.75Z

In System.Web.Mvc.Html ( in System.Web.Mvc.dll ) the begin form is defined like:- Details

BeginForm ( this HtmlHelper htmlHelper, string actionName, string
controllerName, object routeValues, FormMethod method, object htmlAttributes)

Means you should use like this :

Html.BeginForm( string actionName, string controllerName,object routeValues, FormMethod method, object htmlAttributes)

So, it worked in MVC 4

@using (Html.BeginForm(null, null, new { @id = string.Empty }, FormMethod.Post,
    new { @id = "signupform" }))
{
    <input id="TRAINER_LIST" name="TRAINER_LIST" type="hidden" value="">
    <input type="submit" value="Create" id="btnSubmit" />
}

Here is a simple example using the MVVM Light Messenger instead of an event. The view model sends a close message when a button is clicked:

    public MainViewModel()
    {
        QuitCommand = new RelayCommand(ExecuteQuitCommand);
    }

    public RelayCommand QuitCommand { get; private set; }

    private void ExecuteQuitCommand() 
    {
        Messenger.Default.Send<CloseMessage>(new CloseMessage());
    }

Then it is received in the code behind of the window.

    public Main()
    {   
        InitializeComponent();
        Messenger.Default.Register<CloseMessage>(this, HandleCloseMessage);
    }

    private void HandleCloseMessage(CloseMessage closeMessage)
    {
        Close();
    }

global members are not available by default in your <template>'s scope. But you can easily pass them on using computed properties.

computed: {
  moment: () => moment,
  console: () => console,
  window: () => window
}

Now you can use any of them in your template. i.e: console.log(moment(), window).

Note this doesn't add any overhead.

UPDATE messages SET 
 status=10 
WHERE ID in (SELECT TOP (10) Id FROM Table WHERE status=0 ORDER BY priority DESC);

$ grep thestring thefile -5

-5 gets you 5 lines above and below the match 'thestring' is equivalent to -C 5 or -A 5 -B 5.

Here is some HTML and CSS code that would solve your issue:

CSS

.ImageBorder
{
    border-width: 1px;
    border-color: Black;
}

HTML

<img src="MyImage.gif" class="ImageBorder" />

I think I got what I was looking for..

data.train <- read.table("Assign2.WineComplete.csv",sep=",",header=T)
fit <- rpart(quality ~ ., method="class",data=data.train)
plot(fit)
text(fit, use.n=TRUE)
summary(fit)

You add your ActionListener twice to button. So correct your code for button2 to

  JButton button2 = new JButton("hello agin2");
  panel.add(button2);
  button2.addActionListener (new Action2());//note the button2 here instead of button

Furthermore, perform your Swing operations on the correct thread by using EventQueue.invokeLater

For react-native-firebase, adding this to app/build.gradle dependencies section made it work for me:

implementation('com.squareup.okhttp3:okhttp:3.12.1') { force = true }
implementation('com.squareup.okio:okio:1.15.0') { force = true }
implementation('com.google.code.findbugs:jsr305:3.0.2') { force = true}

With the latest version of Xcode (3.2.2), you can drag and drop any crash reports into the Device Logs section of the Xcode Organiser and they will automatically by symbolicated for you. I think this works best if you built that version of the App using Build & Archive (also part of Xcode 3.2.2)

You can not specify the password from the command line but you can do either using ssh keys or using sshpass as suggested by John C. or using a expect script.

To use sshpass, you need to install it first. Then

sshpass -f <(printf '%s\n' your_password) ssh user@hostname

instead of using sshpass -p your_password. As mentioned by Charles Duffy in the comments, it is safer to supply the password from a file or from a variable instead of from command line.

BTW, a little explanation for the <(command) syntax. The shell executes the command inside the parentheses and replaces the whole thing with a file descriptor, which is connected to the command's stdout. You can find more from this answer https://unix.stackexchange.com/questions/156084/why-does-process-substitution-result-in-a-file-called-dev-fd-63-which-is-a-pipe

For having hover effect you can simply try this code

import React from "react";
  import "./styles.css";

    export default function App() {

      function MouseOver(event) {
        event.target.style.background = 'red';
      }
      function MouseOut(event){
        event.target.style.background="";
      }
      return (
        <div className="App">
          <button onMouseOver={MouseOver} onMouseOut={MouseOut}>Hover over me!</button>
        </div>
      );
    }

Or if you want to handle this situation using useState() hook then you can try this piece of code

import React from "react";
import "./styles.css";


export default function App() {
   let [over,setOver]=React.useState(false);

   let buttonstyle={
    backgroundColor:''
  }

  if(over){
    buttonstyle.backgroundColor="green";
  }
  else{
    buttonstyle.backgroundColor='';
  }

  return (
    <div className="App">
      <button style={buttonstyle}
      onMouseOver={()=>setOver(true)} 
      onMouseOut={()=>setOver(false)}
      >Hover over me!</button>
    </div>
  );
}

Both of the above code will work for hover effect but first procedure is easier to write and understand

I know this is really old and most of the folks have already answered it right. Here are at least two ways you can find out the gradle version (not the gradle plugin version) by selecting one of the following on project tab on left:

1. Android > Gradle Scripts > gradle-wrapper.properties (Gradle Version) > distributionURL
2. Project > .gradle > x.y.z <--- this is your gradle version

class Program
{
    private static int[] table;

    static void Main(string[] args)
    {
        int[] ints = new int[] { 6, 2, 5, 99, 55 };

       table = ints.OrderByDescending(x => x).ToArray();

        foreach (var item in table)
        {
            Console.WriteLine(item);
        }

    }

It doesn't work on Ubuntu 16.04, it seems that some libraries have been forgotten in the python installation package on this one. You should use package manager instead.

Solution

Uninstall matplotlib from pip then install it again with apt-get

python 2:

sudo pip uninstall matplotlib
sudo apt-get install python-matplotlib

python 3:

sudo pip3 uninstall matplotlib
sudo apt-get install python3-matplotlib

The answer mentioned by @HaNdTriX is a great, but we are not sure if DOM is completely loaded in the below code:

var loadTime = window.performance.timing.domContentLoadedEventEnd- window.performance.timing.navigationStart; 

This works perfectly when used with onload as:

window.onload = function () {
    var loadTime = window.performance.timing.domContentLoadedEventEnd-window.performance.timing.navigationStart; 
    console.log('Page load time is '+ loadTime);
}

Edit 1: Added some context to answer

Note: loadTime is in milliseconds, you can divide by 1000 to get seconds as mentioned by @nycynik

void show() throws Exception
{
    throw new Exception("my.own.Exception");
}

As there is checked exception in show() method , which is not being handled in that method so we use throws keyword for propagating the Exception.

void show2() throws Exception //Why throws is necessary here ?
{
show();
}

Since you are using the show() method in show2() method and you have propagated the exception atleast you should be handling here. If you are not handling the Exception here , then you are using throws keyword. So that is the reason for using throws keyword at the method signature.

res = request.GET['paymentid'] will raise a KeyError if paymentid is not in the GET data.

Your sample php code checks to see if paymentid is in the POST data, and sets $payID to '' otherwise:

$payID = isset($_POST['paymentid']) ? $_POST['paymentid'] : ''

The equivalent in python is to use the get() method with a default argument:

payment_id = request.POST.get('payment_id', '')

while debugging, this is what I see in the response.GET: <QueryDict: {}>, request.POST: <QueryDict: {}>

It looks as if the problem is not accessing the POST data, but that there is no POST data. How are you are debugging? Are you using your browser, or is it the payment gateway accessing your page? It would be helpful if you shared your view.

Once you are managing to submit some post data to your page, it shouldn't be too tricky to convert the sample php to python.

Instead of Tick event, use Elapsed event.

timer.Elapsed += new EventHandler(TimerEventProcessor);

and change the signiture of TimerEventProcessor method;

private void TimerEventProcessor(object sender, ElapsedEventArgs e)
{
  label1.Text = _counter.ToString();
  _counter += 1;
}

Using table-layout: fixed as a property for table and width: calc(100%/3); for td (assuming there are 3 td's). With these two properties set, the table cells will be equal in size.

Refer to the demo.

There are 3 ways to achieve this as shown below

Method 1:

var uName="abc";
var passwrd="pqr";

$.ajax({
    type: '{GET/POST}',
    url: '{urlpath}',
    headers: {
        "Authorization": "Basic " + btoa(uName+":"+passwrd);
    },
    success : function(data) {
      //Success block  
    },
   error: function (xhr,ajaxOptions,throwError){
    //Error block 
  },
});

Method 2:

var uName="abc";
var passwrd="pqr";

$.ajax({
    type: '{GET/POST}',
    url: '{urlpath}',
     beforeSend: function (xhr){ 
        xhr.setRequestHeader('Authorization', "Basic " + btoa(uName+":"+passwrd)); 
    },
    success : function(data) {
      //Success block 
   },
   error: function (xhr,ajaxOptions,throwError){
    //Error block 
  },
});

Method 3:

var uName="abc";
var passwrd="pqr";

$.ajax({
    type: '{GET/POST}',
    url: '{urlpath}',
    username:uName,
    password:passwrd, 
    success : function(data) {
    //Success block  
   },
    error: function (xhr,ajaxOptions,throwError){
    //Error block 
  },
});

With urlsearchparams:

const params = new URLSearchParams()
params.append('imageurl', http://www.image.com/?username=unknown&password=unknown)
return `http://www.foobar.com/foo?${params.toString()}`

import json

json_data = json.dumps({
  "result":[
    {
      "run":[
        {
          "action":"stop"
        },
        {
          "action":"start"
        },
        {
          "action":"start"
        }
      ],
      "find": "true"
    }
  ]
})

item_dict = json.loads(json_data)
print len(item_dict['result'][0]['run'])

Convert it in dict.

Be careful using SelectedItem.Text... If there is no item selected, then SelectedItem will be null and SelectedItem.Text will generate a null-value exception.

.NET should have provided a SelectedText property like the SelectedValue property that returns String.Empty when there is no selected item.

I spent a lot of time looking for a solution to this problem too. Here's what i've found thus far:

If you want your users to be able to click on a button and copy some text, you may have to use Flash.

If you want your users to press Ctrl+C anywhere on the page, but always copy xyz to the clipboard, I wrote an all-JS solution in YUI3 (although it could easily be ported to other frameworks, or raw JS if you're feeling particularly self-loathing).

It involves creating a textbox off the screen which gets highlighted as soon as the user hits Ctrl/CMD. When they hit 'C' shortly after, they copy the hidden text. If they hit 'V', they get redirected to a container (of your choice) before the paste event fires.

This method can work well, because while you listen for the Ctrl/CMD keydown anywhere in the body, the 'A', 'C' or 'V' keydown listeners only attach to the hidden text box (and not the whole body). It also doesn't have to break the users expectations - you only get redirected to the hidden box if you had nothing selected to copy anyway!

Here's what i've got working on my site, but check http://at.cg/js/clipboard.js for updates if there are any:

YUI.add('clipboard', function(Y) {


// Change this to the id of the text area you would like to always paste in to:

pasteBox = Y.one('#pasteDIV');


// Make a hidden textbox somewhere off the page.

Y.one('body').append('<input id="copyBox" type="text" name="result" style="position:fixed; top:-20%;" onkeyup="pasteBox.focus()">');
copyBox = Y.one('#copyBox');


// Key bindings for Ctrl+A, Ctrl+C, Ctrl+V, etc:

// Catch Ctrl/Window/Apple keydown anywhere on the page.
Y.on('key', function(e) {
    copyData();
        //  Uncomment below alert and remove keyCodes after 'down:' to figure out keyCodes for other buttons.
        //  alert(e.keyCode);
        //  }, 'body',  'down:', Y);
}, 'body',  'down:91,224,17', Y);

// Catch V - BUT ONLY WHEN PRESSED IN THE copyBox!!!
Y.on('key', function(e) {
    // Oh no! The user wants to paste, but their about to paste into the hidden #copyBox!!
    // Luckily, pastes happen on keyPress (which is why if you hold down the V you get lots of pastes), and we caught the V on keyDown (before keyPress).
    // Thus, if we're quick, we can redirect the user to the right box and they can unload their paste into the appropriate container. phew.
    pasteBox.select();
}, '#copyBox',  'down:86', Y);

// Catch A - BUT ONLY WHEN PRESSED IN THE copyBox!!!
Y.on('key', function(e) {
    // User wants to select all - but he/she is in the hidden #copyBox! That wont do.. select the pasteBox instead (which is probably where they wanted to be).
    pasteBox.select();
}, '#copyBox',  'down:65', Y);



// What to do when keybindings are fired:

// User has pressed Ctrl/Meta, and is probably about to press A,C or V. If they've got nothing selected, or have selected what you want them to copy, redirect to the hidden copyBox!
function copyData() {
    var txt = '';
    // props to Sabarinathan Arthanari for sharing with the world how to get the selected text on a page, cheers mate!
        if (window.getSelection) { txt = window.getSelection(); }
        else if (document.getSelection) { txt = document.getSelection(); }
        else if (document.selection) { txt = document.selection.createRange().text; }
        else alert('Something went wrong and I have no idea why - please contact me with your browser type (Firefox, Safari, etc) and what you tried to copy and I will fix this immediately!');

    // If the user has nothing selected after pressing Ctrl/Meta, they might want to copy what you want them to copy. 
        if(txt=='') {
                copyBox.select();
        }
    // They also might have manually selected what you wanted them to copy! How unnecessary! Maybe now is the time to tell them how silly they are..?!
        else if (txt == copyBox.get('value')) {
        alert('This site uses advanced copy/paste technology, possibly from the future.\n \nYou do not need to select things manually - just press Ctrl+C! \n \n(Ctrl+V will always paste to the main box too.)');
                copyBox.select();
        } else {
                // They also might have selected something completely different! If so, let them. It's only fair.
        }
}
});

Hope someone else finds this useful :]

if ($('#elem')[0]) {
  // do stuff
}

I find this particularly useful for when you want to 'store' a function call.

For example, suppose I have some unit tests for a function 'add':

def add(a, b): return a + b
tests = { (1,4):5, (0, 0):0, (-1, 3):3 }
for test, result in tests.items():
    print 'test: adding', test, '==', result, '---', add(*test) == result

There is no other way to call add, other than manually doing something like add(test[0], test[1]), which is ugly. Also, if there are a variable number of variables, the code could get pretty ugly with all the if-statements you would need.

Another place this is useful is for defining Factory objects (objects that create objects for you). Suppose you have some class Factory, that makes Car objects and returns them. You could make it so that myFactory.make_car('red', 'bmw', '335ix') creates Car('red', 'bmw', '335ix'), then returns it.

def make_car(*args):
    return Car(*args)

This is also useful when you want to call a superclass' constructor.

You can also use firstOrCreate OR firstOrNew

// Retrieve the Post by the attributes, or create it if it doesn't exist...
$post = Post::firstOrCreate(['id' => 3]);
// OR
// Retrieve the Post by the attributes, or instantiate a new instance...
$post = Post::firstOrNew(['id' => 3]); 

// update record
$post->title = "Updated title";
$post->save();

Hope it will help you :)

Your debut and fin values are floating point values, not integers, because taille is a float.

Make those values integers instead:

item = plateau[int(debut):int(fin)]

Alternatively, make taille an integer:

taille = int(sqrt(len(plateau)))

strtotime('-1 day', strtotime($date))

This returns the number of difference in seconds of the given date and the $date.so you are getting wrong result .

Suppose $date is todays date and -1 day means it returns -86400 as the difference and the when you try using date you will get 1969-12-31 Unix timestamp start date.

I know I am very late.. (almost nine years), but if someone wants small explanation then you can go for this:

In simple words, you use Interface when you know what an Object can do or what function we are going to implement on an object.. Example Insert,Update, and Delete.

interface ICRUD{
      void InsertData(); // will insert data
      void UpdateData(); // will update data
      void DeleteData(); // will delete data
}

Important Note: Interfaces are ALWAYS public.

Hope this helps.

Check this PowerShell Which.

The code provided there suggests this:

($Env:Path).Split(";") | Get-ChildItem -filter notepad.exe

1. Open Terminal
2. Type in sudo gem install cocoapods if you don't have CocoaPods
3. Enter cd /project path, but replace project path with actual project path
4. touch podfile
5. Use one of the following commands to open the podfile: open -e podfile to open in TextEdit or open -a pod file to open in Xcode
6. Set your target and add pod file of GoogleMaps like as:

   target 'PROJECT NAME HERE' do
   pod 'GoogleMaps'
   end
   

7. Use pod install to install dependencies

System.out.println("\"Hello\""); 

There is an implicit call to super() with no arguments for all classes that have a parent - which is every user defined class in Java - so calling it explicitly is usually not required. However, you may use the call to super() with arguments if the parent's constructor takes parameters, and you wish to specify them. Moreover, if the parent's constructor takes parameters, and it has no default parameter-less constructor, you will need to call super() with argument(s).

An example, where the explicit call to super() gives you some extra control over the title of the frame:

class MyFrame extends JFrame
{
    public MyFrame() {
        super("My Window Title");
        ...
    }
}

#!/bin/bash
for i in $(seq 1 2 10)
do
   echo "skip by 2 value $i"
done

If someone referring how to do the same feature (reading OTP using received SMS) on Xamarin Android like me :

1. Add this code to your AndroidManifest.xml file :

   <receiver android:name=".listener.BroadcastReveiverOTP">
   <intent-filter>
       <action android:name="android.provider.Telephony.SMS_RECEIVED" />
   </intent-filter>
   </receiver>
   <uses-permission android:name="android.permission.RECEIVE_SMS" />
   <uses-permission android:name="android.permission.BROADCAST_SMS" />
   <uses-permission android:name="android.permission.READ_SMS" />
   

2. Then create your BroadcastReveiver class in your Android Project.

   [BroadcastReceiver(Enabled = true)] [IntentFilter(new[] { "android.provider.Telephony.SMS_RECEIVED" }, Priority = (int)IntentFilterPriority.HighPriority)] 
   public class BroadcastReveiverOTP : BroadcastReceiver {
           public static readonly string INTENT_ACTION = "android.provider.Telephony.SMS_RECEIVED";
   
           protected string message, address = string.Empty;
   
           public override void OnReceive(Context context, Intent intent)
           {
               if (intent.HasExtra("pdus"))
               {
                   var smsArray = (Java.Lang.Object[])intent.Extras.Get("pdus");
                   foreach (var item in smsArray)
                   {
                       var sms = SmsMessage.CreateFromPdu((byte[])item);
                       address = sms.OriginatingAddress;
                       if (address.Equals("NotifyDEMO"))
                       {
                           message = sms.MessageBody;
                           string[] pin = message.Split(' ');
                           if (!string.IsNullOrWhiteSpace(pin[0]))
                           { 
                                   // NOTE : Here I'm passing received OTP to Portable Project using MessagingCenter. So I can display the OTP in the relevant entry field.
                                   MessagingCenter.Send<object, string>(this,MessengerKeys.OnBroadcastReceived, pin[0]);
                           }
                           }
                   }
               }
           }
   }
   

3. Register this BroadcastReceiver class in your MainActivity class on Android Project:

   public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity {
   
           // Initialize your class
           private BroadcastReveiverOTP _receiver = new BroadcastReveiverOTP ();
   
           protected override void OnCreate(Bundle bundle) { 
                   base.OnCreate(bundle);
   
                   global::Xamarin.Forms.Forms.Init(this, bundle);
                   LoadApplication(new App());
   
                   // Register your receiver :  RegisterReceiver(_receiver, new IntentFilter("android.provider.Telephony.SMS_RECEIVED"));
   
           }
   }
   

You might want to look at my FOSS project CSVfix (updated link), which is a CSV stream editor written in C++. The CSV parser is no prize, but does the job and the whole package may do what you need without you writing any code.

See alib/src/a_csv.cpp for the CSV parser, and csvlib/src/csved_ioman.cpp (IOManager::ReadCSV) for a usage example.

Just in case someone else comes across this, to clarify the answer `n is grave accent n, not single tick n

Here is a side-by-side comparison of several application starters/generators and other technologies including MEAN.js, MEAN.io, and cleverstack. I keep adding alternatives as I find time and as that happens, the list of potentially provided benefits keeps growing too. Today it's up to around 1600. If anyone wants to help improve its accuracy or completeness, click the next link and do a questionnaire about something you know.

Compare app technologies project

From this database, the system generates reports like the following:

MeanJS vs MeanIO trade-off report

In codeigniter there is no need to sennd "data" in ajax post method.. here is the example .

   searchThis = 'This text will be search';
    $.ajax({
      type: "POST",
      url: "<?php echo site_url();?>/software/search/"+searchThis,
      dataType: "html",
      success:function(data){
        alert(data);
      },

    });

Note : in url , software is the controller name , search is the function name and searchThis is the variable that i m sending.

Here is the controller.

    public function search(){
    $search = $this->uri->segment(3);
      echo '<p>'.$search.'</p>';
    }

I hope you can get idea for your work .

$( ".datepicker_recurring_start" ).each(function(){
    $(this).datepicker({
        dateFormat:"dd/mm/yy",
        yearRange: '2000:2012',
        changeYear: true,
        changeMonth: true
    });
});

Using math module

speed of this has to be tested

from math import floor

def get_decimal(number):
    '''returns number - floor of number'''
    return number-floor(number)

Example:

n = 765.126357123

get_decimal(n)

0.12635712300004798

You can use a dictionary too.

def install():
    print "In install"

methods = {'install': install}

method_name = 'install' # set by the command line options
if method_name in methods:
    methods[method_name]() # + argument list of course
else:
    raise Exception("Method %s not implemented" % method_name)

The ioctl function is useful for implementing a device driver to set the configuration on the device. e.g. a printer that has configuration options to check and set the font family, font size etc. ioctl could be used to get the current font as well as set the font to a new one. A user application uses ioctl to send a code to a printer telling it to return the current font or to set the font to a new one.

int ioctl(int fd, int request, ...)

1. fd is file descriptor, the one returned by open;
2. request is request code. e.g GETFONT will get the current font from the printer, SETFONT will set the font on the printer;
3. the third argument is void *. Depending on the second argument, the third may or may not be present, e.g. if the second argument is SETFONT, the third argument can be the font name such as "Arial";

int request is not just a macro. A user application is required to generate a request code and the device driver module to determine which configuration on device must be played with. The application sends the request code using ioctl and then uses the request code in the device driver module to determine which action to perform.

A request code has 4 main parts

    1. A Magic number - 8 bits
    2. A sequence number - 8 bits
    3. Argument type (typically 14 bits), if any.
    4. Direction of data transfer (2 bits).  

If the request code is SETFONT to set font on a printer, the direction for data transfer will be from user application to device driver module (The user application sends the font name "Arial" to the printer). If the request code is GETFONT, direction is from printer to the user application.

In order to generate a request code, Linux provides some predefined function-like macros.

1._IO(MAGIC, SEQ_NO) both are 8 bits, 0 to 255, e.g. let us say we want to pause printer. This does not require a data transfer. So we would generate the request code as below

#define PRIN_MAGIC 'P'
#define NUM 0
#define PAUSE_PRIN __IO(PRIN_MAGIC, NUM) 

and now use ioctl as

ret_val = ioctl(fd, PAUSE_PRIN);

The corresponding system call in the driver module will receive the code and pause the printer.

2. __IOW(MAGIC, SEQ_NO, TYPE) MAGIC and SEQ_NO are the same as above, and TYPE gives the type of the next argument, recall the third argument of ioctl is void *. W in __IOW indicates that the data flow is from user application to driver module. As an example, suppose we want to set the printer font to "Arial".

#define PRIN_MAGIC 'S'
#define SEQ_NO 1
#define SETFONT __IOW(PRIN_MAGIC, SEQ_NO, unsigned long)

further,

char *font = "Arial";
ret_val = ioctl(fd, SETFONT, font); 

Now font is a pointer, which means it is an address best represented as unsigned long, hence the third part of _IOW mentions type as such. Also, this address of font is passed to corresponding system call implemented in device driver module as unsigned long and we need to cast it to proper type before using it. Kernel space can access user space and hence this works. other two function-like macros are __IOR(MAGIC, SEQ_NO, TYPE) and __IORW(MAGIC, SEQ_NO, TYPE) where the data flow will be from kernel space to user space and both ways respectively.

Please let me know if this helps!

import sys
userinput = sys.stdin.readline()
betAmount = int(userinput)

print betAmount

This works on my system. I checked int('23\n') would result in 23.

1. There is no such thing as xhr.file = file;; the file object is not supposed to be attached this way.

2. xhr.send(file) doesn't send the file. You have to use the FormData object to wrap the file into a multipart/form-data post data object:

   var formData = new FormData();
   formData.append("thefile", file);
   xhr.send(formData);
   

After that, the file can be access in $_FILES['thefile'] (if you are using PHP).

Remember, MDC and Mozilla Hack demos are your best friends.

EDIT: The (2) above was incorrect. It does send the file, but it would send it as raw post data. That means you would have to parse it yourself on the server (and it's often not possible, depend on server configuration). Read how to get raw post data in PHP here.

The other answers are correct. But I want to add that it is a relic of the time when people were first learning CSS, and abused float to do all their layout. float is meant to do stuff like float images next to long runs of text, but lots of people used it as their primary layout mechanism. Since it wasn't really meant for that, you need hacks like "clearfix" to make it work.

These days display: inline-block is a solid alternative (except for IE6 and IE7), although more modern browsers are coming with even more useful layout mechanisms under names like flexbox, grid layout, etc.

SIGABRT means in general that there is an uncaught exception. There should be more information on the console.

1. RestTemplate timeout with SimpleClientHttpRequestFactory To programmatically override the timeout properties, we can customize the SimpleClientHttpRequestFactory class as below.

Override timeout with SimpleClientHttpRequestFactory

//Create resttemplate
RestTemplate restTemplate = new RestTemplate(getClientHttpRequestFactory());

//Override timeouts in request factory
private SimpleClientHttpRequestFactory getClientHttpRequestFactory() 
{
    SimpleClientHttpRequestFactory clientHttpRequestFactory
                      = new SimpleClientHttpRequestFactory();
    //Connect timeout
    clientHttpRequestFactory.setConnectTimeout(10_000);

    //Read timeout
    clientHttpRequestFactory.setReadTimeout(10_000);
    return clientHttpRequestFactory;
}

2. RestTemplate timeout with HttpComponentsClientHttpRequestFactory SimpleClientHttpRequestFactory helps in setting timeout but it is very limited in functionality and may not prove sufficient in realtime applications. In production code, we may want to use HttpComponentsClientHttpRequestFactory which support HTTP Client library along with resttemplate.

HTTPClient provides other useful features such as connection pool, idle connection management etc.

Read More : Spring RestTemplate + HttpClient configuration example

Override timeout with HttpComponentsClientHttpRequestFactory

//Create resttemplate
RestTemplate restTemplate = new RestTemplate(getClientHttpRequestFactory());

//Override timeouts in request factory
private SimpleClientHttpRequestFactory getClientHttpRequestFactory() 
{
    HttpComponentsClientHttpRequestFactory clientHttpRequestFactory
                      = new HttpComponentsClientHttpRequestFactory();
    //Connect timeout
    clientHttpRequestFactory.setConnectTimeout(10_000);

    //Read timeout
    clientHttpRequestFactory.setReadTimeout(10_000);
    return clientHttpRequestFactory;
}

reference: Spring RestTemplate timeout configuration example

Do .libPaths(), close every R runing, check in the first directory, remove the zoo package restart R and install zoo again. Of course you need to have sufficient rights.

A couple of gotchas that are colloraries to Andrew Shelansky's excellent answer and to disagree a little with doesn't really change the way that the compiler reads the code

Because your function prototypes are compiled as C, you can't have overloading of the same function names with different parameters - that's one of the key features of the name mangling of the compiler. It is described as a linkage issue but that is not quite true - you will get errors from both the compiler and the linker.

The compiler errors will be if you try to use C++ features of prototype declaration such as overloading.

The linker errors will occur later because your function will appear to not be found, if you do not have the extern "C" wrapper around declarations and the header is included in a mixture of C and C++ source.

One reason to discourage people from using the compile C as C++ setting is because this means their source code is no longer portable. That setting is a project setting and so if a .c file is dropped into another project, it will not be compiled as c++. I would rather people take the time to rename file suffixes to .cpp.

What you are thinking of sounds a lot like triggers. MongoDB does not have any support for triggers, however some people have "rolled their own" using some tricks. The key here is the oplog.

When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this oplog and then applying the changes locally.

Does this sound familiar?

I cannot detail the whole process here, it is several pages of documentation, but the tools you need are available.

First some write-ups on the oplog - Brief description - Layout of the local collection (which contains the oplog)

You will also want to leverage tailable cursors. These will provide you with a way to listen for changes instead of polling for them. Note that replication uses tailable cursors, so this is a supported feature.

The ...(spread operator) is used in react to:

provide a neat way to pass props from parent to child components. e.g given these props in a parent component,

this.props = {
  username: "danM",
  email: "[email protected]"
}

they could be passed in the following manner to the child,

<ChildComponent {...this.props} />

which is similar to this

<ChildComponent username={this.props.username} email={this.props.email} />

but way cleaner.

Create Table as select (CTAS) is possible in Hive.

You can try out below command:

CREATE TABLE new_test 
    row format delimited 
    fields terminated by '|' 
    STORED AS RCFile 
AS select * from source where col=1

1. Target cannot be partitioned table.
2. Target cannot be external table.
3. It copies the structure as well as the data

Create table like is also possible in Hive.

1. It just copies the source table definition.

window.onload = function(){ document.getElementById("loading").style.display = "none" }

#loading {width: 100%;height: 100%;top: 0px;left: 0px;position: fixed;display: block; z-index: 99}_x000D_
_x000D_
#loading-image {position: absolute;top: 40%;left: 45%;z-index: 100} 

<div id="loading">_x000D_
<img id="loading-image" src="img/loading.gif" alt="Loading..." />_x000D_
</div>  

Page loading image with simplest fadeout effect created in JS:

For anyone who likes Extension methods, this one does the trick for us.

using System.Text;

namespace System
{
    public static class StringExtension
    {
        private static readonly ASCIIEncoding asciiEncoding = new ASCIIEncoding();

        public static string ToAscii(this string dirty)
        {
            byte[] bytes = asciiEncoding.GetBytes(dirty);
            string clean = asciiEncoding.GetString(bytes);
            return clean;
        }
    }
}

(System namespace so it's available pretty much automatically for all of our strings.)

I use linux and the answers did not help me.
I had to erase the folder ~/.config/smartgit to make it work again. This is what the documentation is saying

Default Location of SmartGit's Settings Directory
Windows %APPDATA%\syntevo\SmartGit\ (%APPDATA% is the path defined in the environment variable APPDATA)
Mac OS ~/Library/Preferences/SmartGit/ (the Finder might not show the ~/Libraries directory by default, but you can invoke open ~/Library from a terminal)
Linux/Unix ${XDG_CONFIG_HOME}/smartgit/ (if the environment variable XDG_CONFIG_HOME is not defined, ~/.config is used instead)

To change the port

npm start --port 8000

Suppose I have committed changes to master branch.I will get the commit id(xyz) of the commit now i have to go to branch for which i need to push my commits.

Single commit id xyx

git checkout branch-name
git cherry-pick xyz
git push origin branch-name

Multiple commit id's xyz abc qwe

git checkout branch-name
git cherry-pick xyz abc qwe
git push origin branch-name

Try using below:

SELECT 
    (RTRIM(LTRIM(col_1))) + (RTRIM(LTRIM(col_2))) AS Col_newname,
    col_1,
    col_2 
FROM 
    s_cols 
WHERE
    col_any_condition = ''
;

My implementation:

def get_nested(data, *args):
    if args and data:
        element  = args[0]
        if element:
            value = data.get(element)
            return value if len(args) == 1 else get_nested(value, *args[1:])

Example usage:

>>> dct={"foo":{"bar":{"one":1, "two":2}, "misc":[1,2,3]}, "foo2":123}
>>> get_nested(dct, "foo", "bar", "one")
1
>>> get_nested(dct, "foo", "bar", "two")
2
>>> get_nested(dct, "foo", "misc")
[1, 2, 3]
>>> get_nested(dct, "foo", "missing")
>>>

There are no exceptions raised in case a key is missing, None value is returned in that case.

The syntax

def x():
    print(20)

is basically the same as x = lambda: print(20) (there are some differences under the hood, but for most pratical purposes, the results the same).

The syntax

def y(t):
   return t**2

is basically the same as y= lambda t: t**2. When you define a function, you're creating a variable that has the function as its value. In the first example, you're setting x to be the function lambda: print(20). So x now refers to that function. x() is not the function, it's the call of the function. In python, functions are simply a type of variable, and can generally be used like any other variable. For example:

def power_function(power):
      return  lambda x : x**power
power_function(3)(2)

This returns 8. power_function is a function that returns a function as output. When it's called on 3, it returns a function that cubes the input, so when that function is called on the input 2, it returns 8. You could do cube = power_function(3), and now cube(2) would return 8.

You can eventually extend the EL language by using the EL Functor, which will allow you to call any Java beans methods, even with parameters...

If you want a specific order, then you must use an array, not an object. Objects do not have a defined order.

For example, using an array, you could do this:

var myobj = [{"A":["B"]}, {"B": ["C"]}];
var firstItem = myobj[0];

Then, you can use myobj[0] to get the first object in the array.

Or, depending upon what you're trying to do:

var myobj = [{key: "A", val:["B"]}, {key: "B",  val:["C"]}];
var firstKey = myobj[0].key;   // "A"
var firstValue = myobj[0].val; // "["B"]

You can use Apache Commons Configuration library. The best part of this is, it won't even mess up the properties file and keeps it intact (even comments).

Javadoc

PropertiesConfiguration conf = new PropertiesConfiguration("propFile.properties");
conf.setProperty("key", "value");
conf.save();    

I have been there, like so many of us. There are so many confusing words like Web API, REST, RESTful, HTTP, SOAP, WCF, Web Services... and many more around this topic. But I am going to give brief explanation of only those which you have asked.

REST

It is neither an API nor a framework. It is just an architectural concept. You can find more details here.

RESTful

I have not come across any formal definition of RESTful anywhere. I believe it is just another buzzword for APIs to say if they comply with REST specifications.

EDIT: There is another trending open source initiative OpenAPI Specification (OAS) (formerly known as Swagger) to standardise REST APIs.

Web API

It in an open source framework for writing HTTP APIs. These APIs can be RESTful or not. Most HTTP APIs we write are not RESTful. This framework implements HTTP protocol specification and hence you hear terms like URIs, request/response headers, caching, versioning, various content types(formats).

Note: I have not used the term Web Services deliberately because it is a confusing term to use. Some people use this as a generic concept, I preferred to call them HTTP APIs. There is an actual framework named 'Web Services' by Microsoft like Web API. However it implements another protocol called SOAP.

It looks like the best approach is to use:

ContextCompat.getColor(context, R.color.color_name)

eg:

yourView.setBackgroundColor(ContextCompat.getColor(applicationContext,
                            R.color.colorAccent))

This will choose the Marshmallow two parameter method or the pre-Marshmallow method appropriately.

SELECT name  
FROM sys.databases

You'll only see the databases you have permission to see.

or even a very classic old fashion method

IEnumerable<string> collection = new List<string>() { "a", "b", "c" };

for(int i = 0; i < collection.Count(); i++) 
{
    string str1 = collection.ElementAt(i);
    // do your stuff   
}

maybe you would like this method also :-)

Do you mean that you've got code like

if(map.containsKey(key)) doSomethingWith(map.get(key))

all over the place ? Then you should simply check whether map.get(key) returned null and that's it. By the way, HashMap doesn't throw exceptions for missing keys, it returns null instead. The only case where containsKey is needed is when you're storing null values, to distinguish between a null value and a missing value, but this is usually considered bad practice.

You have two ways:

First go to the particular path of Android SDK:

1) Open your command prompt and traverse to the platform-tools directory through it such as

$ cd Frameworks\Android-Sdk\platform-tools

2) Run your adb commands now such as to know that your adb is working properly :

$ adb devices OR adb logcat OR simply adb

Second way is :

1) Right click on your My Computer.

2) Open Environment variables.

3) Add new variable to your System PATH variable(Add if not exist otherwise no need to add new variable if already exist).

4) Add path of platform-tools directory to as value of this variable such as C:\Program Files\android-sdk\platform-tools.

5) Restart your computer once.

6) Now run the above adb commands such adb devices or other adb commands from anywhere in command prompt.

Also on you can fire a command on terminal setx PATH "%PATH%;C:\Program Files\android-sdk\platform-tools"

Quote (read [here][1])-

When you use CAST to convert a CLOB value into a character datatype or a BLOB value into the RAW datatype, the database implicitly converts the LOB value to character or raw data and then explicitly casts the resulting value into the target datatype.

So, something like this should work-

report := CAST(report_clob AS VARCHAR2(100));

Or better yet use it as CAST(report_clob AS VARCHAR2(100)) where ever you are trying to use the BLOB as VARCHAR [1]: http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions016.htm

I like @fubo's answer the best but I think this is much more elegant.

This method is more compatible because it doesn't manually store the length up front.

Also I've exposed extensions to support compression for string to string, byte[] to byte[], and Stream to Stream.

public static class ZipExtensions
{
    public static string CompressToBase64(this string data)
    {
        return Convert.ToBase64String(Encoding.UTF8.GetBytes(data).Compress());
    }

    public static string DecompressFromBase64(this string data)
    {
        return Encoding.UTF8.GetString(Convert.FromBase64String(data).Decompress());
    }
    
    public static byte[] Compress(this byte[] data)
    {
        using (var sourceStream = new MemoryStream(data))
        using (var destinationStream = new MemoryStream())
        {
            sourceStream.CompressTo(destinationStream);
            return destinationStream.ToArray();
        }
    }

    public static byte[] Decompress(this byte[] data)
    {
        using (var sourceStream = new MemoryStream(data))
        using (var destinationStream = new MemoryStream())
        {
            sourceStream.DecompressTo(destinationStream);
            return destinationStream.ToArray();
        }
    }
    
    public static void CompressTo(this Stream stream, Stream outputStream)
    {
        using (var gZipStream = new GZipStream(outputStream, CompressionMode.Compress))
        {
            stream.CopyTo(gZipStream);
            gZipStream.Flush();
        }
    }

    public static void DecompressTo(this Stream stream, Stream outputStream)
    {
        using (var gZipStream = new GZipStream(stream, CompressionMode.Decompress))
        {
            gZipStream.CopyTo(outputStream);
        }
    }
}

The query below returns the timezone of the current session.

select timediff(now(),convert_tz(now(),@@session.time_zone,'+00:00'));

Actually Interface and abstract class are used to just specify some contract/rules which will just show, how their sub classes will be.

Mostly we know that interface is a pure abstract.Means there you cant specify a single method with body.This particular point is the advantages of abstract class.Means in abstract class u have right to specify method with body and without body as-well.

So if u want to specify something about ur subclass, then u may go for interface. But if u also want to specify something for ur sub classes and u want also ur class should also have some own method.Then in that case u may go for abstract class

This smells of something that should be done with a JOIN instead. Can you share the larger problem with us?

Hey, I should be able to get this down to a single statement, but I haven't had time to play with it further yet today and may not get to. In the mean-time, know that you should be able to edit the query for your inner cursor to create the row numbers as part of the query using the ROW_NUMBER() function. From there, you can fold the inner cursor into the outer by doing an INNER JOIN on it (you can join on a sub query). Finally, any SELECT statement can be converted to an UPDATE using this method:

UPDATE [YourTable/Alias]
   SET [Column] = q.Value
FROM
(
   ... complicate select query here ...
) q

Where [YourTable/Alias] is a table or alias used in the select query.

See the scipy.interpolate documentation for some examples.

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

>>> from scipy.interpolate import interp1d

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

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

This is just a workaround solution:

In normal cases, use the solutions that are shipped with git. These work great in most cases. Force to LF if you share the development on Windows and Unix based systems by setting .gitattributes.

In my case there were >10 programmers developing a project in Windows. This project was checked in with CRLF and there was no option to force to LF.

Some settings were internally written on my machine without any influence on the LF format; thus some files were globally changed to LF on each small file change.

My solution:

Windows-Machines: Let everything as it is. Care about nothing, since you are a default windows 'lone wolf' developer and you have to handle like this: "There is no other system in the wide world, is it?"

Unix-Machines

1. Add following lines to a config's [alias] section. This command lists all changed (i.e. modified/new) files:

   lc = "!f() { git status --porcelain \
                | egrep -r \"^(\?| ).\*\\(.[a-zA-Z])*\" \
                | cut -c 4- ; }; f "
   

2. Convert all those changed files into dos format:

   unix2dos $(git lc)
   

3. Optionally ...

   1. Create a git hook for this action to automate this process

   2. Use params and include it and modify the grep function to match only particular filenames, e.g.:

      ... | egrep -r "^(\?| ).*\.(txt|conf)" | ...
      

   3. Feel free to make it even more convenient by using an additional shortcut:

      c2dos = "!f() { unix2dos $(git lc) ; }; f "
      

      ... and fire the converted stuff by typing

      git c2dos
      

If you are having a problem with the font working I have also had this in the past and the issue I found was down to the font-family: name. This had to match what font name was actually given.

The easiest way I found to find this out was to install the font and see what display name is given.

For example, I was using Gill Sans on one project, but the actual font was called Gill Sans MT. Spacing and capitlisation was also important to get right.

Hope that helps.

I had the same problem with Xcode. I followed steps you gave and it didn't work. I became crazy because in every forum I saw, all clues for this problem are the one you gave. I finally saw I put a space after the malloc_error_break, I suppressed it and now it works. A dumb problem but if the solution doesn't work, be sure you haven't put any space before and after the malloc_error_break.

Hope this message will help..

It looks like you are only adding children to the first parent treeView2.Nodes[0].Nodes.Add(yourChildNode)
Depending on how you want it to behave, you need to be explicit about the parent node you wish to add the child to.
For Example, from your screenshot, if you wanted to add the child to the second node you would need:
treeView2.Nodes[1].Nodes.Add(yourChildNode)
If you want to add the children to the currently selected node, get the TreeView.SelectedNode and add the children to it.

Try TreeView to get an idea of how the class operates. Unfortunately the msdn documentation is pretty light on the code samples...

I'm missing a whole lot of safety checks here!

Something like (untested):

private void addChildNode_Click(object sender, EventArgs e) {
  TreeNode ParentNode = treeView2.SelectedNode;  // for ease of debugging!
  if (ParentNode != null) {
    ParentNode.Nodes.Add("Name Of Node");
    treeView2.ExpandAll();   // so you can see what's been added              
    treeView2.Invalidate();  // requests a redraw
  }
}

To compare Strings you have to use the equals keyword.

if(c.equals(""))
{
}

-- create test table "Accounts"
create table Accounts (
  c_ID int primary key
 ,first_name varchar(100)
 ,last_name varchar(100)
 ,city varchar(100)
 );

insert into Accounts values (101, 'Sebastian', 'Volk', 'Frankfurt' );
insert into Accounts values (102, 'Beate',  'Mueller', 'Hamburg' );
insert into Accounts values (103, 'John',  'Walker', 'Washington' );
insert into Accounts values (104, 'Britney', 'Sears', 'Holywood' );
insert into Accounts values (105, 'Sarah', 'Schmidt', 'Mainz' );
insert into Accounts values (106, 'George', 'Lewis', 'New Jersey' );
insert into Accounts values (107, 'Jian-xin', 'Wang', 'Peking' );
insert into Accounts values (108, 'Katrina', 'Khan', 'Bolywood' );

-- declare table variable
declare @tb_FirstName table(name varchar(100));
insert into  @tb_FirstName values ('John'), ('Sarah'), ('George');

SELECT * 
FROM Accounts
WHERE first_name in (select name from @tb_FirstName);

SELECT * 
FROM Accounts
WHERE first_name not in (select name from @tb_FirstName);
go

drop table Accounts;
go

All of these answers are really great for moving data! Where they fail is preserving the column type of data being moved. This becomes a problem when you want to do things like merge datatables that appear to be the same. JsonConvert will look at the first row of data to determine the column datatype, which may be guessed incorrectly.

To get around this;

• Serialize the DataTable and DataColumn definitions in separate response objects.
• Deserialize the DataColumn definitions in the response before reading in the table.
• Deserialize and merge the DataTable ignoring the schema defined by Json.

It sounds like a lot, but its only three additional lines of code.

// Get our Column definitions and serialize them using an anoymous function.
var columns = dt.Columns.Cast<DataColumn>().Select(c => new { DataPropertyName = c.ColumnName, DataPropertyType = c.DataType.ToString()});
resp.ObjSchema = JsonConvert.SerializeObject(columns);
resp.Obj = JsonConvert.SerializeObject(dt);

resp.ObjSchema becomes;

[
  {
    "DataPropertyName": "RowId",
    "DataPropertyType ": "System.Int32"
  },
  {
    "DataPropertyName": "ItemName",
    "DataPropertyType ": "System.String"
  }
]

Instead of letting Json define the column definitions via dt = JsonConvert.DeserializeObject<DataTable>(response) we can use LINQ on our resp.ObjSchema to define them ourselves. We'll use MissingSchemaAction.Ignore to ignore the schema provided by Json.

// If your environment does not support dynamic you'll need to create a class for with DataPropertyName and DataPropertyType.
JsonConvert.DeserializeObject<List<dynamic>>(response.ObjSchema).ForEach(prop =>
{
    dt.Columns.Add(new DataColumn() { ColumnName = prop.DataPropertyName, DataType = Type.GetType(prop.DataPropertyType.ToString()) });
});
// Merge the results ignoring the JSON schema.
dt.Merge(JsonConvert.DeserializeObject<DataTable>(response.Obj), true, MissingSchemaAction.Ignore);

You can always get a list by running:

svn status --help

The latest version of .Net (v4.6) just added built-in support for Unix time conversions. That includes both to and from Unix time represented by either seconds or milliseconds.

• Unix time in seconds to DateTimeOffset:

DateTimeOffset dateTimeOffset = DateTimeOffset.FromUnixTimeSeconds(1000);

• DateTimeOffset to Unix time in seconds:

long unixTimeStampInSeconds = dateTimeOffset.ToUnixTimeSeconds();

• Unix time in milliseconds to DateTimeOffset:

DateTimeOffset dateTimeOffset = DateTimeOffset.FromUnixTimeMilliseconds(1000000);

• DateTimeOffset to Unix time in milliseconds:

long unixTimeStampInMilliseconds= dateTimeOffset.ToUnixTimeMilliseconds();

Note: These methods convert to and from DateTimeOffset. To get a DateTime representation simply use the DateTimeOffset.DateTime property:

DateTime dateTime = dateTimeOffset.UtcDateTime;

How about with a :before pseudoelement:

a:before {
  content: '\a';
  white-space: pre;
}

On version 4.4.1, you can use:

npm config set @myco:registry=http://reg.example.com

Where @myco is your package scope. You can install package in this way:

npm install @myco/my-package

ref: https://docs.npmjs.com/misc/scope

Late to the party, here is a short one. It has these limitations:

• It only does a plain string sort of the SubItems' Texts
• It uses the ListView's Tag
• It assumes all clicked columns will be filled

You can register & unregister any ListView to its service; make sure the Sorting is set to None..:

public static class LvSort
{
    static List<ListView> LVs = new List<ListView>();
    public static void registerLV(ListView lv)
    {
        if (!LVs.Contains(lv) && lv is ListView)
        {
            LVs.Add(lv);
            lv.ColumnClick +=Lv_ColumnClick;
        }
    }
    public static void unRegisterLV(ListView lv)
    {
        if (LVs.Contains(lv) && lv is ListView)
        {
            LVs.Remove(lv);
            lv.ColumnClick -=Lv_ColumnClick;
        }
    }

    private static void Lv_ColumnClick(object sender, ColumnClickEventArgs e)
    {
        ListView lv = sender as ListView;
        if (lv == null) return;
        int c = e.Column;
        bool asc = (lv.Tag == null) || ( lv.Tag.ToString() != c+"");
        var items = lv.Items.Cast<ListViewItem>().ToList();
        var sorted =  asc ? items.OrderByDescending(x => x.SubItems[c].Text).ToList() :
                            items.OrderBy(x => x.SubItems[c].Text).ToList();
        lv.Items.Clear();
        lv.Items.AddRange(sorted.ToArray());
        if (asc) lv.Tag = c+""; else lv.Tag = null;
    }
}

To register simply do..:

public Form1()
{
    InitializeComponent();
    LvSort.registerLV(yourListView1);
}

Update:

Here is a slightly extended version that will let you sort all sorts of data types using any sorting rule you come up with. All you need to do is write a special string conversion for your data, add it to the function list and mark your columns. To do so simply put the column names appended with a marker string in the columns' Tags.

I have added one for sorting DataTimes and one for integers.

This version will also sort jagged ListViews, i.e. those with different numbers of subitems.

public static class LvCtl
{
    static List<ListView> LVs = new List<ListView>();

    delegate string  StringFrom (string s);

    static Dictionary<string, StringFrom> funx = new Dictionary<string, StringFrom>();

    public static void registerLV(ListView lv)
    {
        if (!LVs.Contains(lv) && lv is ListView)
        {
            LVs.Add(lv);
            lv.ColumnClick +=Lv_ColumnClick;

            funx.Add("", stringFromString);
            for (int i = 0; i <  lv.Columns.Count; i++)
            {
                if (lv.Columns[i].Tag == null) continue;
                string n = lv.Columns[i].Tag.ToString();
                if (n == "") continue;
                if (n.Contains("__date")) funx.Add(n, stringFromDate);
                if (n.Contains("__int")) funx.Add(n, stringFromInt);
                else funx.Add(n, stringFromString);
            }

        }
    }

    static string stringFromString(string s)
    {
        return s;
    }
    static string stringFromInt(string s)
    {
        int i = 0;
        int.TryParse(s, out i);
        return i.ToString("00000") ;
    }
    static string stringFromDate(string s)
    {
        DateTime dt = Convert.ToDateTime(s);
        return dt.ToString("yyyy.MM.dd HH.mm.ss");
    }

    private static void Lv_ColumnClick(object sender, ColumnClickEventArgs e)
    {
        ListView lv = sender as ListView;
        if (lv == null) return;


        int c = e.Column;
        string nt = lv.Columns[c].Tag != null ? lv.Columns[c].Tag.ToString() : "";
        string n = nt.Replace("__", "§").Split('§')[0];

        bool asc = (lv.Tag == null) || ( lv.Tag.ToString() != c+"");
        var items = lv.Items.Cast<ListViewItem>().ToList();
        var sorted =  asc?
            items.OrderByDescending(x =>  funx[nt]( c < x.SubItems.Count ?
                                    x.SubItems[c].Text: "")).ToList() :
            items.OrderBy(x => funx[nt](c < x.SubItems.Count ?
                          x.SubItems[c].Text : "")).ToList();
        lv.Items.Clear();
        lv.Items.AddRange(sorted.ToArray());
        if (asc) lv.Tag = c+""; else lv.Tag = null;
    }

    public static void unRegisterLV(ListView lv)
    {
        if (LVs.Contains(lv) && lv is ListView)
        {
            LVs.Remove(lv);
            lv.ColumnClick -=Lv_ColumnClick;
        }
    }
}

You can also try this.

 select db_name(dbid) dbname, filename from sys.sysaltfiles

In my case I was trying to connect to a remote mysql server on cent OS. After going through a lot of solutions (granting all privileges, removing ip bindings,enabling networking) problem was still not getting solved.

As it turned out, while looking into various solutions,I came across iptables, which made me realize mysql port 3306 was not accepting connections.

Here is a small note on how I checked and resolved this issue.

• Checking if port is accepting connections:

  telnet (mysql server ip) [portNo]

• Adding ip table rule to allow connections on the port:

  iptables -A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT

• Would not recommend this for production environment, but if your iptables are not configured properly, adding the rules might not still solve the issue. In that case following should be done:

  service iptables stop

Hope this helps.

cURL file object in procedural method:

$file = curl_file_create('full path/filename','extension','filename');

cURL file object in Oop method:

$file = new CURLFile('full path/filename','extension','filename');

$post= array('file' => $file);

$curl = curl_init();  
//curl_setopt ... 
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
$response = curl_exec($curl);
curl_close($curl);

SQL tables are not ordered by default, and asking for the n-th row from a non ordered set of rows has no meaning as it could potentially return a different row each time unless you specify an ORDER BY:

select * from customer order by id where row_number() = 3

(sometimes MySQL tables are shown with an internal order but you cannot rely on this behaviour). Then you can use LIMIT offset, row_count, with a 0-based offset so row number 3 becomes offset 2:

select * from customer order by id
limit 2, 1

or you can use LIMIT row_count OFFSET offset:

select * from customer order by id
limit 1 offset 2

You do not need to take a pointer to the array in order to pass it to an array-generating function, because arrays already decay to pointers when you pass them to functions. Simply make the parameter int a[], and use it as a regular array inside the function, the changes will be made to the array that you have passed in.

void generateArray(int a[],  int si) {
    srand(time(0));
    for (int j=0;j<*si;j++)
        a[j]=(0+rand()%9);
}

int main(){
    const int size=5;
    int a[size];
    generateArray(a, size);
    return 0;
}

As a side note, you do not need to pass the size by pointer, because you are not changing it inside the function. Moreover, it is not a good idea to pass a pointer to constant to a parameter that expects a pointer to non-constant.

1. go to regedit ( go to search and type regedit)
2. expand "HKEY_CURRENT_USER" node
3. under HKEY_CURRENT_USER node expand "software" node
4. under software node expand "microsoft" node
5. under microsoft node click on "Command Processor"
6. path looks like this : "HKEY_CURRENT_USER\Software\Microsoft\Command Processor"

it looks something like this :

7. if you do not see "Autorun" String Value
8. Right Click - New - Expandable String Value, and rename it to Autorun
9. double click on "Autorun" 10.enter this value path format:
10. "CD/d C:\yourfoldername\yoursubfoldername"

You didn't specify a GradientType:

background: #f0f0f0; /* Old browsers */
background: -moz-linear-gradient(top, #ffffff 0%, #eeeeee 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffffff), color-stop(100%,#eeeeee)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #ffffff 0%,#eeeeee 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #ffffff 0%,#eeeeee 100%); /* Opera11.10+ */
background: -ms-linear-gradient(top, #ffffff 0%,#eeeeee 100%); /* IE10+ */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#eeeeee',GradientType=0 ); /* IE6-9 */
background: linear-gradient(top, #ffffff 0%,#eeeeee 100%); /* W3C */

source: http://www.colorzilla.com/gradient-editor/

add .htaccess file to you root folder and paste the following code and replace yourdomainname with your own domain name

RewriteEngine on RewriteCond %{HTTP_HOST} ^(www.)?yourdomainname$ RewriteCond %{REQUEST_URI} !^/public/

RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ /public/$1

RewriteCond %{HTTP_HOST} ^(www.)?yourdomainname$ RewriteRule ^(/)?$ /public/index.php [L]

Not 100% sure about the relationship between these two entities but here goes:

IList<Splitting> res = (from s in [data source]
                        where s.Customer.CompanyID == [companyID] &&
                              s.CustomerID == [customerID]
                        select s).ToList();

IList<Splitting> res = [data source].Splittings.Where(
                           x => x.Customer.CompanyID == [companyID] &&
                                x.CustomerID == [customerID]).ToList();

If you have your dates in DateTime variables, they don't have a format.

You can use the Date property to return a DateTime value with the time portion set to midnight. So, if you have:

DateTime dt1 = DateTime.Parse("07/12/2011");
DateTime dt2 = DateTime.Now;

if(dt1.Date > dt2.Date)
{
     //It's a later date
}
else
{
     //It's an earlier or equal date
}

You could always include it using __DIR__:

include(dirname(__DIR__).'/config.php');

__DIR__ is a 'magical constant' and returns the directory of the current file without the trailing slash. It's actually an absolute path, you just have to concatenate the file name to __DIR__. In this case, as we need to ascend a directory we use PHP's dirname which ascends the file tree, and from here we can access config.php.

You could set the root path in this method too:

define('ROOT_PATH', dirname(__DIR__) . '/');

in test.php would set your root to be at the /root/ level.

include(ROOT_PATH.'config.php');

Should then work to include the config file from where you want.

Assuming MySQL (EDIT: posted before the SQL variant was supplied):

ALTER TABLE myTable ADD myNewColumn VARCHAR(255) AFTER myOtherColumn

The AFTER keyword tells MySQL where to place the new column. You can also use FIRST to flag the new column as the first column in the table.

Absolutely, divs can have more than one class and with some Bootstrap components you'll often need to have multiple classes for them to function as you want them to. Applying multiple classes of course is possible outside of bootstrap as well. All you have to do is separate each class with a space.

Example below:

<label class="checkbox inline">
   <input type="checkbox" id="inlineCheckbox1" value="option1"> 1
</label>

I am not sure about Python but most languages have push/append function for arrays.

Here's a self contained Delphi / Pascal version of the function based on Joshua's answer up above. Uses TPoint for VCL screen graphics, but should be easy to adjust as needed.

function DistancePtToSegment( pt, pt1, pt2: TPoint): double;
var
   a, b, c, d: double;
   len_sq: double;
   param: double;
   xx, yy: double;
   dx, dy: double;
begin
   a := pt.x - pt1.x;
   b := pt.y - pt1.y;
   c := pt2.x - pt1.x;
   d := pt2.y - pt1.y;

   len_sq := (c * c) + (d * d);
   param := -1;

   if (len_sq <> 0) then
   begin
      param := ((a * c) + (b * d)) / len_sq;
   end;

   if param < 0 then
   begin
      xx := pt1.x;
      yy := pt1.y;
   end
   else if param > 1 then
   begin
      xx := pt2.x;
      yy := pt2.y;
   end
   else begin
      xx := pt1.x + param * c;
      yy := pt1.y + param * d;
   end;

   dx := pt.x - xx;
   dy := pt.y - yy;
   result := sqrt( (dx * dx) + (dy * dy))
end;

Fiddle: http://jsfiddle.net/simple/BdQvp/

You can do it like so:

I have added two buttons in the Fiddle to illustrate how you can insert or clear values in those input fields through buttons. You just capture the onClick event and call the function.

//Fires when the Document Loads, clears all input fields
$(document).ready(function() {
  $('.fetch_results').find('input:text').val('');    
});

//Custom Functions that you can call
function resetAllValues() {
  $('.fetch_results').find('input:text').val('');
}

function addSomeValues() {
  $('.fetch_results').find('input:text').val('Lala.');
}

Update:

Check out this great answer below by Beena as well for a more universal approach.

The below example is self explainatory. where refs and events can be used to call function from and to parent and child.

// PARENT
<template>
  <parent>
    <child
      @onChange="childCallBack"
      ref="childRef"
      :data="moduleData"
    />
    <button @click="callChild">Call Method in child</button>
  </parent>
</template>

<script>
export default {
  methods: {
    callChild() {
      this.$refs.childRef.childMethod('Hi from parent');
    },
    childCallBack(message) {
      console.log('message from child', message);
    }
  }
};
</script>

// CHILD
<template>
  <child>
    <button @click="callParent">Call Parent</button>
  </child>
</template>

<script>
export default {
  methods: {
    callParent() {
      this.$emit('onChange', 'hi from child');
    },
    childMethod(message) {
      console.log('message from parent', message);
    }
  }
}
</script>

Problem description

JavaScript has no built-in general map type (sometimes called associative array or dictionary) which allows to access arbitrary values by arbitrary keys. JavaScript's fundamental data structure is the object, a special type of map which only accepts strings as keys and has special semantics like prototypical inheritance, getters and setters and some further voodoo.

When using objects as maps, you have to remember that the key will be converted to a string value via toString(), which results in mapping 5 and '5' to the same value and all objects which don't overwrite the toString() method to the value indexed by '[object Object]'. You might also involuntarily access its inherited properties if you don't check hasOwnProperty().

JavaScript's built-in array type does not help one bit: JavaScript arrays are not associative arrays, but just objects with a few more special properties. If you want to know why they can't be used as maps, look here.

Eugene's Solution

Eugene Lazutkin already described the basic idea of using a custom hash function to generate unique strings which can be used to look up the associated values as properties of a dictionary object. This will most likely be the fastest solution, because objects are internally implemented as hash tables.

• Note: Hash tables (sometimes called hash maps) are a particular implementation of the map concept using a backing array and lookup via numeric hash values. The runtime environment might use other structures (such as search trees or skip lists) to implement JavaScript objects, but as objects are the fundamental data structure, they should be sufficiently optimised.

In order to get a unique hash value for arbitrary objects, one possibility is to use a global counter and cache the hash value in the object itself (for example, in a property named __hash).

A hash function which does this is and works for both primitive values and objects is:

function hash(value) {
    return (typeof value) + ' ' + (value instanceof Object ?
        (value.__hash || (value.__hash = ++arguments.callee.current)) :
        value.toString());
}

hash.current = 0;

This function can be used as described by Eugene. For convenience, we will further wrap it in a Map class.

My Map implementation

The following implementation will additionally store the key-value-pairs in a doubly linked list in order to allow fast iteration over both keys and values. To supply your own hash function, you can overwrite the instance's hash() method after creation.

// Linking the key-value-pairs is optional.
// If no argument is provided, linkItems === undefined, i.e. !== false
// --> linking will be enabled
function Map(linkItems) {
    this.current = undefined;
    this.size = 0;

    if(linkItems === false)
        this.disableLinking();
}

Map.noop = function() {
    return this;
};

Map.illegal = function() {
    throw new Error("illegal operation for maps without linking");
};

// Map initialisation from an existing object
// doesn't add inherited properties if not explicitly instructed to:
// omitting foreignKeys means foreignKeys === undefined, i.e. == false
// --> inherited properties won't be added
Map.from = function(obj, foreignKeys) {
    var map = new Map;

    for(var prop in obj) {
        if(foreignKeys || obj.hasOwnProperty(prop))
            map.put(prop, obj[prop]);
    }

    return map;
};

Map.prototype.disableLinking = function() {
    this.link = Map.noop;
    this.unlink = Map.noop;
    this.disableLinking = Map.noop;
    this.next = Map.illegal;
    this.key = Map.illegal;
    this.value = Map.illegal;
    this.removeAll = Map.illegal;

    return this;
};

// Overwrite in Map instance if necessary
Map.prototype.hash = function(value) {
    return (typeof value) + ' ' + (value instanceof Object ?
        (value.__hash || (value.__hash = ++arguments.callee.current)) :
        value.toString());
};

Map.prototype.hash.current = 0;

// --- Mapping functions

Map.prototype.get = function(key) {
    var item = this[this.hash(key)];
    return item === undefined ? undefined : item.value;
};

Map.prototype.put = function(key, value) {
    var hash = this.hash(key);

    if(this[hash] === undefined) {
        var item = { key : key, value : value };
        this[hash] = item;

        this.link(item);
        ++this.size;
    }
    else this[hash].value = value;

    return this;
};

Map.prototype.remove = function(key) {
    var hash = this.hash(key);
    var item = this[hash];

    if(item !== undefined) {
        --this.size;
        this.unlink(item);

        delete this[hash];
    }

    return this;
};

// Only works if linked
Map.prototype.removeAll = function() {
    while(this.size)
        this.remove(this.key());

    return this;
};

// --- Linked list helper functions

Map.prototype.link = function(item) {
    if(this.size == 0) {
        item.prev = item;
        item.next = item;
        this.current = item;
    }
    else {
        item.prev = this.current.prev;
        item.prev.next = item;
        item.next = this.current;
        this.current.prev = item;
    }
};

Map.prototype.unlink = function(item) {
    if(this.size == 0)
        this.current = undefined;
    else {
        item.prev.next = item.next;
        item.next.prev = item.prev;
        if(item === this.current)
            this.current = item.next;
    }
};

// --- Iterator functions - only work if map is linked

Map.prototype.next = function() {
    this.current = this.current.next;
};

Map.prototype.key = function() {
    return this.current.key;
};

Map.prototype.value = function() {
    return this.current.value;
};

Example

The following script,

var map = new Map;

map.put('spam', 'eggs').
    put('foo', 'bar').
    put('foo', 'baz').
    put({}, 'an object').
    put({}, 'another object').
    put(5, 'five').
    put(5, 'five again').
    put('5', 'another five');

for(var i = 0; i++ < map.size; map.next())
    document.writeln(map.hash(map.key()) + ' : ' + map.value());

generates this output:

string spam : eggs
string foo : baz
object 1 : an object
object 2 : another object
number 5 : five again
string 5 : another five

Further considerations

PEZ suggested to overwrite the toString() method, presumably with our hash function. This is not feasible, because it doesn't work for primitive values (changing toString() for primitives is a very bad idea). If we want toString() to return meaningful values for arbitrary objects, we would have to modify Object.prototype, which some people (myself not included) consider verboten.

The current version of my Map implementation as well as other JavaScript goodies can be obtained from here.

My problem had fixed by the following config:

Build Active Architecture Only: YES

You can use Integer.parseInt(str) and catch the NumberFormatException if the string is not a valid integer, in the following fashion (as pointed out by all answers):

static boolean isInt(String s)
{
 try
  { int i = Integer.parseInt(s); return true; }

 catch(NumberFormatException er)
  { return false; }
}

However, note here that if the evaluated integer overflows, the same exception will be thrown. Your purpose was to find out whether or not, it was a valid integer. So its safer to make your own method to check for validity:

static boolean isInt(String s)  // assuming integer is in decimal number system
{
 for(int a=0;a<s.length();a++)
 {
    if(a==0 && s.charAt(a) == '-') continue;
    if( !Character.isDigit(s.charAt(a)) ) return false;
 }
 return true;
}

To make multiple checking statements more readable (and avoid nested ifs):

var tmp = 'Test[[email protected]]';

var posStartEmail = undefined;
var posEndEmail = undefined;
var email = undefined;

do {
    if (tmp.toLowerCase().substring(0,4) !== 'test') { break; }

    posStartEmail = tmp.toLowerCase().substring(4).indexOf('[');
    posEndEmail = tmp.toLowerCase().substring(4).indexOf(']');

    if (posStartEmail === -1 || posEndEmail === -1) { break; }

    email = tmp.substring(posStartEmail+1+4,posEndEmail);

    if (email.indexOf('@') === -1) { break; }

// all checks are done - do what you intend to do

    alert ('All checks are ok')

    break; // the most important break of them all

} while(true);

I was getting the same error. In the Project Facets of my Java project, the Java compile level was set to 1.7 whereas the WebSphere Application Server v7.0 had a Runtime Composition of JRE v1.6; setting the Java compile level to 1.6 in Project Facets got rid of the error. I did not have to change the Compiler compliance level though, it's still 1.7. Hope this helps!

The final version taking care of all previous complaints (ports, logical url, relative url, existing absolute url...etc.) considering the current handler is the page:

public static string ConvertToAbsoluteUrl(string url)
{
    if (!IsAbsoluteUrl(url))
    {
        if (HttpContext.Current != null && HttpContext.Current.Request != null && HttpContext.Current.Handler is System.Web.UI.Page)
        {
            var originalUrl = HttpContext.Current.Request.Url;
            return string.Format("{0}://{1}{2}{3}", originalUrl.Scheme, originalUrl.Host, !originalUrl.IsDefaultPort ? (":" + originalUrl.Port) : string.Empty, ((System.Web.UI.Page)HttpContext.Current.Handler).ResolveUrl(url));
        }
        throw new Exception("Invalid context!");
    }
    else
        return url;
}

private static bool IsAbsoluteUrl(string url)
{
    Uri result;
    return Uri.TryCreate(url, UriKind.Absolute, out result);
}

Even easier, especially with tab completion:

db.test.find(ObjectId('4ecc05e55dd98a436ddcc47c'))

Edit: also works with the findOne command for prettier output.

A better way to add the multiple classes separated by spaces in a string is using the Spread_syntax with the split:

element.classList.add(...classesStr.split(" "));

As in Swift 3.x for upload image with parameter we can use below alamofire upload method-

static func uploadImageData(inputUrl:String,parameters:[String:Any],imageName: String,imageFile : UIImage,completion:@escaping(_:Any)->Void) {

        let imageData = UIImageJPEGRepresentation(imageFile , 0.5)

        Alamofire.upload(multipartFormData: { (multipartFormData) in

            multipartFormData.append(imageData!, withName: imageName, fileName: "swift_file\(arc4random_uniform(100)).jpeg", mimeType: "image/jpeg")

            for key in parameters.keys{
                let name = String(key)
                if let val = parameters[name!] as? String{
                    multipartFormData.append(val.data(using: .utf8)!, withName: name!)
                }
            }
        }, to:inputUrl)
        { (result) in
            switch result {
            case .success(let upload, _, _):

                upload.uploadProgress(closure: { (Progress) in
                })

                upload.responseJSON { response in

                    if let JSON = response.result.value {
                        completion(JSON)
                    }else{
                        completion(nilValue)
                    }
                }

            case .failure(let encodingError):
                completion(nilValue)
            }

        }

    }

Note: Additionally if our parameter is array of key-pairs then we can use

 var arrayOfKeyPairs = [[String:Any]]()
 let json = try? JSONSerialization.data(withJSONObject: arrayOfKeyPairs, options: [.prettyPrinted])
 let jsonPresentation = String(data: json!, encoding: .utf8)

Sorry for coding with Kotlin. But I faced the same problem. I solved with the code below.

list.setOnItemClickListener{ _, view, _, _ ->
        val text1 = view.find<TextView>(R.id.~~).text

        }

You can put an id which shows a TextView that you want in "~~".

Hope it'll help someone!

First create an xpath selector function.

function _x(STR_XPATH) {
    var xresult = document.evaluate(STR_XPATH, document, null, XPathResult.ANY_TYPE, null);
    var xnodes = [];
    var xres;
    while (xres = xresult.iterateNext()) {
        xnodes.push(xres);
    }

    return xnodes;
}

To use the xpath selector with jquery, you can do like this:

$(_x('/html/.//div[@id="text"]')).attr('id', 'modified-text');

Hope this can help.

You would use the WITH ADMIN OPTION option in the GRANT statement

GRANT CREATE SESSION TO <<username>> WITH ADMIN OPTION

If you don't want it using position fixed, and following you annoyingly on mobile, this seems to be working for me so far.

html {
    min-height: 100%;
    position: relative;
}

#site-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 6px 2px;
    background: #32383e;
}

Just set the html to min-height: 100%; and position: relative;, then position: absolute; bottom: 0; left: 0; on the footer. I then made sure the footer was the last element in the body.

Let me know if this doesn't work for anyone else, and why. I know these tedious style hacks can behave strangely among various circumstances I'd not thought of.

in my case there was a rule about hover-effect by the anchor, like this:

#content a:hover {
    border-bottom: 1px solid #333;
}

Of course, text-decoration: none; could not help in this situation. And I spend a lot of time until I found it out.

So: An underscore is not to be confused with a border-bottom.

You can add an undecorated JDialog like this:

import java.awt.event.*;

import javax.swing.*;

public class TestSwing {
  public static void main(String[] args) throws Exception {
    JFrame frame = new JFrame("Parent");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(800, 600);
    frame.setVisible(true);

    final JDialog dialog = new JDialog(frame, "Child", true);    
    dialog.setSize(300, 200);
    dialog.setLocationRelativeTo(frame);
    JButton button = new JButton("Button");
    button.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        dialog.dispose();
      }
    });
    dialog.add(button);
    dialog.setUndecorated(true);
    dialog.setVisible(true);
  }
}

import sys
import time

a = 0  
for x in range (0,3):  
    a = a + 1  
    b = ("Loading" + "." * a)
    # \r prints a carriage return first, so `b` is printed on top of the previous line.
    sys.stdout.write('\r'+b)
    time.sleep(0.5)
print (a)

Note that you might have to run sys.stdout.flush() right after sys.stdout.write('\r'+b) depending on which console you are doing the printing to have the results printed when requested without any buffering.

This is an Oracle-specific notation for an outer join. It means that it will include all rows from t1, and use NULLS in the t0 columns if there is no corresponding row in t0.

In standard SQL one would write:

SELECT t0.foo, t1.bar
  FROM FIRST_TABLE t0
 RIGHT OUTER JOIN SECOND_TABLE t1;

Oracle recommends not to use those joins anymore if your version supports ANSI joins (LEFT/RIGHT JOIN) :

Oracle recommends that you use the FROM clause OUTER JOIN syntax rather than the Oracle join operator. Outer join queries that use the Oracle join operator (+) are subject to the following rules and restrictions […]

If you have the web view figured out but your images are still out of scale, the best solution I found (here) was simply prepending the document with:

<style>img{display: inline; height: auto; max-width: 100%;}</style>

As a result all images are scaled to match the web view width.

For adding unique index following are required:

1) table_name
2) index_name
3) columns on which you want to add index

ALTER TABLE  `tablename` 
ADD UNIQUE index-name
(`column1` ,`column2`,`column3`,...,`columnN`);

In your case we can create unique index as follows:

ALTER TABLE `votes`ADD 
UNIQUE <votesuniqueindex>;(`user` ,`email`,`address`);

The fix for the heartbleed vulnerability has been backported to 1.0.1e-16 by Red Hat for Enterprise Linux see, and this is therefore the official fix that CentOS ships.

Replacing OpenSSL with the latest version from upstream (i.e. 1.0.1g) runs the risk of introducing functionality changes which may break compatibility with applications/clients in unpredictable ways, causes your system to diverge from RHEL, and puts you on the hook for personally maintaining future updates to that package. By replacing openssl using a simple make config && make && make install means that you also lose the ability to use rpm to manage that package and perform queries on it (e.g. verifying all the files are present and haven't been modified or had permissions changed without also updating the RPM database).

I'd also caution that crypto software can be extremely sensitive to seemingly minor things like compiler options, and if you don't know what you're doing, you could introduce vulnerabilities in your local installation.

My problem was slightly different. I did everything right. But I was inheriting the wrong class for the activity hosting the fragment.

So to be clear, if you are overriding onCreateOptionsMenu(Menu menu, MenuInflater inflater) in the fragment, make sure your activity class which hosts this fragment inherits android.support.v7.app.ActionBarActivity (in case you would want to support below API level 11).

I was inheriting the android.support.v4.app.FragmentActivity to support API level below 11.

It looks like you indented so_far = new too much. Try this:

if guess in word:
    print("\nYes!", guess, "is in the word!")

    # Create a new variable (so_far) to contain the guess
    new = ""
    i = 0
    for i in range(len(word)):
        if guess == word[i]:
            new += guess
        else:
            new += so_far[i]
    so_far = new # unindented this

Here is the complete answer to the question.

import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;

class ListIterator implements Iterator<String>{
    List<String> list;
    int pos = 0;

    public ListIterator(List<String> list) {
        this.list = list;
    }

    @Override
    public boolean hasNext() {
        while(pos < list.size()){
            if (list.get(pos).startsWith("a"))
                return true;
            pos++;
        }
        return false;

    }

    @Override
    public String next() {
        if (hasNext())
            return list.get(pos++);
        throw new NoSuchElementException();
    }
}

public class IteratorTest {

    public static void main(String[] args) {
        List<String> list = Arrays.asList("alice", "bob", "abigail", "charlie");
        ListIterator itr = new ListIterator(list);

        while(itr.hasNext())
            System.out.println(itr.next()); // prints alice, abigail
    }
}

• ListIterator is the iterator for the array which returns the elements that start with 'a'.
• There is no need for implementing an Iterable interface. But that is a possibility.
• There is no need to implement this generically.
• It fully satisfies the contract for hasNext() and next(). ie if hasNext() says there are still elements, next() will return those elements. And if hasNext() says no more elements, it returns a valid NoSuchElementException exception.

You don't even need to define a constructor

struct foo {
    bool a = true;
    bool b = true;
    bool c;
 } bar;

To clarify: these are called brace-or-equal-initializers (because you may also use brace initialization instead of equal sign). This is not only for aggregates: you can use this in normal class definitions. This was added in C++11.

The syntax "select top (@var) ..." only works in SQL SERVER 2005+. For SQL 2000, you can do:

set rowcount @top

select * from sometable

set rowcount 0 

Hope this helps

Oisin.

(edited to replace @@rowcount with rowcount - thanks augustlights)

If you are using Android then you can use android.util.Base64 class.

Encode:

passwd = Base64.encodeToString( passwd.getBytes(), Base64.DEFAULT );

Decode:

passwd = new String( Base64.decode( passwd, Base64.DEFAULT ) );

A simple and fast single line solution.

There are different ways to do that.

• I created the data frame to showcase the different techniques to filter your data.

df = pd.DataFrame({'Date':['01-Jun-13','03-Jun-13', '15-Aug-13', '20-Jan-14', '21-Feb-14'],

'abc':[100,-20,40,25,60],'xyz':[200,50,-5,15,80] })

• I separated months/year/day and seperated month-year as you explained.

def getMonth(s):
  return s.split("-")[1]

def getDay(s):
  return s.split("-")[0]

def getYear(s):
  return s.split("-")[2]

def getYearMonth(s):
  return s.split("-")[1]+"-"+s.split("-")[2]

• I created new columns: year, month, day and 'yearMonth'. In your case, you need one of both. You can group using two columns 'year','month' or using one column yearMonth

df['year']= df['Date'].apply(lambda x: getYear(x))
df['month']= df['Date'].apply(lambda x: getMonth(x))
df['day']= df['Date'].apply(lambda x: getDay(x))
df['YearMonth']= df['Date'].apply(lambda x: getYearMonth(x))

Output:

        Date  abc  xyz year month day YearMonth
0  01-Jun-13  100  200   13   Jun  01    Jun-13
1  03-Jun-13  -20   50   13   Jun  03    Jun-13
2  15-Aug-13   40   -5   13   Aug  15    Aug-13
3  20-Jan-14   25   15   14   Jan  20    Jan-14
4  21-Feb-14   60   80   14   Feb  21    Feb-14

• You can go through the different groups in groupby(..) items.

In this case, we are grouping by two columns:

for key,g in df.groupby(['year','month']):
    print key,g

Output:

('13', 'Jun')         Date  abc  xyz year month day YearMonth
0  01-Jun-13  100  200   13   Jun  01    Jun-13
1  03-Jun-13  -20   50   13   Jun  03    Jun-13
('13', 'Aug')         Date  abc  xyz year month day YearMonth
2  15-Aug-13   40   -5   13   Aug  15    Aug-13
('14', 'Jan')         Date  abc  xyz year month day YearMonth
3  20-Jan-14   25   15   14   Jan  20    Jan-14
('14', 'Feb')         Date  abc  xyz year month day YearMonth

In this case, we are grouping by one column:

for key,g in df.groupby(['YearMonth']):
    print key,g

Output:

Jun-13         Date  abc  xyz year month day YearMonth
0  01-Jun-13  100  200   13   Jun  01    Jun-13
1  03-Jun-13  -20   50   13   Jun  03    Jun-13
Aug-13         Date  abc  xyz year month day YearMonth
2  15-Aug-13   40   -5   13   Aug  15    Aug-13
Jan-14         Date  abc  xyz year month day YearMonth
3  20-Jan-14   25   15   14   Jan  20    Jan-14
Feb-14         Date  abc  xyz year month day YearMonth
4  21-Feb-14   60   80   14   Feb  21    Feb-14

• In case you wanna access to specific item, you can use get_group

print df.groupby(['YearMonth']).get_group('Jun-13')

Output:

        Date  abc  xyz year month day YearMonth
0  01-Jun-13  100  200   13   Jun  01    Jun-13
1  03-Jun-13  -20   50   13   Jun  03    Jun-13

• Similar to get_group. This hack would help to filter values and get the grouped values.

This also would give the same result.

print df[df['YearMonth']=='Jun-13'] 

Output:

        Date  abc  xyz year month day YearMonth
0  01-Jun-13  100  200   13   Jun  01    Jun-13
1  03-Jun-13  -20   50   13   Jun  03    Jun-13

You can select list of abc or xyz values during Jun-13

print df[df['YearMonth']=='Jun-13'].abc.values
print df[df['YearMonth']=='Jun-13'].xyz.values

Output:

[100 -20]  #abc values
[200  50]  #xyz values

You can use this to go through the dates that you have classified as "year-month" and apply cretiria on it to get related data.

for x in set(df.YearMonth): 
    print df[df['YearMonth']==x].abc.values
    print df[df['YearMonth']==x].xyz.values

I recommend also to check this answer as well.

Unordered lists are often created with the intent of using them as a menu, but an li list item is text. Because the list li item is text, the mouse pointer will not be an arrow, but an "I cursor". Users are accustomed to seeing a pointing finger for a mouse pointer when something is clickable. Using an anchor tag a inside of the li tag causes the mouse pointer to change to a pointing finger. The pointing finger is a lot better for using the list as a menu.

<ul id="menu">
   <li><a href="#">Menu Item 1</a></li>
   <li><a href="#">Menu Item 2</a></li>
   <li><a href="#">Menu Item 3</a></li>
   <li><a href="#">Menu Item 4</a></li>
</ul>

If the list is being used for a menu, and doesn't need a link, then a URL doesn't need to be designated. But the problem is that if you leave out the href attribute, text in the <a> tag is seen as text, and therefore the mouse pointer is back to an I-cursor. The I-cursor might make the user think that the menu item is not clickable. Therefore, you still need an href, but you don't need a link to anywhere.

You could use lots of div or p tags for a menu list, but the mouse pointer would be an I-cursor for them also.

You could use lots of buttons stacked on top of each other for a menu list, but the list seems to be preferable. And that's probably why the href="#" that points to nowhere is used in anchor tags inside of list tags.

You can set the pointer style in CSS, so that is another option. The href="#" to nowhere might just be the lazy way to set some styling.

In the URL you pointed to, the button_text.xml is being used to set the textColor attribute.That it is reason they had the button_text.xml in res/color folder and therefore they used @color/button_text.xml

But you are trying to use it for background attribute. The background attribute looks for something in res/drawable folder.

check this i got this selector custom button from the internet.I dont have the link.but i thank the poster for this.It helped me.have this in the drawable folder

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" >
        <shape>
            <gradient
                android:startColor="@color/yellow1"
                android:endColor="@color/yellow2"
                android:angle="270" />
            <stroke
                android:width="3dp"
                android:color="@color/grey05" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>

    <item android:state_focused="true" >
        <shape>
            <gradient
                android:endColor="@color/orange4"
                android:startColor="@color/orange5"
                android:angle="270" />
            <stroke
                android:width="3dp"
                android:color="@color/grey05" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>

    <item>        
        <shape>
            <gradient
                android:endColor="@color/white1"
                android:startColor="@color/white2"
                android:angle="270" />
            <stroke
                android:width="3dp"
                android:color="@color/grey05" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>

</selector>

And i used in my main.xml layout like this

<Button android:id="@+id/button1"
            android:layout_alignParentLeft="true"
            android:layout_marginTop="150dip"
            android:layout_marginLeft="45dip"
            android:textSize="7pt"
            android:layout_height="wrap_content"
            android:layout_width="230dip"
            android:text="@string/welcomebtntitle1"
            android:background="@drawable/custombutton"/>

Hope this helps. Vik is correct.

EDIT : Here is the colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
   <color name="yellow1">#F9E60E</color>
   <color name="yellow2">#F9F89D</color>
   <color name="orange4">#F7BE45</color>
   <color name="orange5">#F7D896</color>
   <color name="blue2">#19FCDA</color>
   <color name="blue25">#D9F7F2</color>
   <color name="grey05">#ACA899</color>
   <color name="white1">#FFFFFF</color>
   <color name="white2">#DDDDDD</color>
</resources>

If you want a good format the next statement is the best:

dataframe_prediction.to_csv('filename.csv', sep=',', encoding='utf-8', index=False)

In this case you have got a csv file with ',' as separate between columns and utf-8 format. In addition, numerical index won't appear.

I should tell you the basic steps and rest depends upon your own effort. You need to perform following steps.

• Create a connection string.
• Create a SQL connection
• Create SQL command
• Create SQL data adapter
• fill your dataset.

Do not forget to open and close connection. follow this link for more under standing.

You can see your current session settings by querying nls_session_parameters:

select value
from nls_session_parameters
where parameter = 'NLS_NUMERIC_CHARACTERS';

VALUE                                  
----------------------------------------
.,                                       

That may differ from the database defaults, which you can see in nls_database_parameters.

In this session your query errors:

select to_number('100,12') from dual;

Error report -
SQL Error: ORA-01722: invalid number
01722. 00000 -  "invalid number"

I could alter my session, either directly with alter session or by ensuring my client is configured in a way that leads to the setting the string needs (it may be inherited from a operating system or Java locale, for example):

alter session set NLS_NUMERIC_CHARACTERS = ',.';
select to_number('100,12') from dual;

TO_NUMBER('100,12')
-------------------
             100,12 

In SQL Developer you can set your preferred value in Tool->Preferences->Database->NLS.

But I can also override that session setting as part of the query, with the optional third nlsparam parameter to to_number(); though that makes the optional second fmt parameter necessary as well, so you'd need to be able pick a suitable format:

alter session set NLS_NUMERIC_CHARACTERS = '.,';
select to_number('100,12', '99999D99', 'NLS_NUMERIC_CHARACTERS='',.''')
from dual;

TO_NUMBER('100,12','99999D99','NLS_NUMERIC_CHARACTERS='',.''')
--------------------------------------------------------------
                                                        100.12 

By default the result is still displayed with my session settings, so the decimal separator is still a period.

Get a handle to the root layout used, then set the background color on that. The root layout is whatever you called setContentView with.

 setContentView(R.layout.main);

  // Now get a handle to any View contained 
  // within the main layout you are using
  View someView = findViewById(R.id.randomViewInMainLayout);

  // Find the root view
  View root = someView.getRootView();

  // Set the color
  root.setBackgroundColor(getResources().getColor(android.R.color.red));

(Update: If I could delete this answer I would, although since it's accepted, I can't. I'm updating the description to provide better guidance and discourage folks from using the poor practice I outlined in the original answer).

You can specify these parameters via context or environment parameters, such as in context.xml. See the sections titled "Context Parameters" and "Environment Entries" on this page:

http://tomcat.apache.org/tomcat-5.5-doc/config/context.html

As @netjeff points out, these values will be available via the Context.lookup(String) method and not as System parameters.

Another way to do specify these values is to define variables inside of the web.xml file of the web application you're deploying (see below). As @Roberto Lo Giacco points out, this is generally considered a poor practice since a deployed artifact should not be environment specific. However, below is the configuration snippet if you really want to do this:

<env-entry>
    <env-entry-name>SMTP_PASSWORD</env-entry-name>
    <env-entry-type>java.lang.String</env-entry-type>
    <env-entry-value>abc123ftw</env-entry-value>
</env-entry>

If you want to select the file or folder you can use the following:

Process.Start("explorer.exe", "/select, c:\\teste");

Yes, use gzip for this. The best way is to read data as input and redirect the compressed to output file i.e.

cat test.csv | gzip > test.csv.gz

cat test.csv will send the data as stdout and using pipe-sign gzip will read that data as stdin. Make sure to redirect the gzip output to some file as compressed data will not be written to the terminal.

Note that services and tools for sending emails may be able to inline your CSS for you, allowing CSS in <style> tags to work in Gmail.

For instance, if you're sending emails with MailChimp, your CSS from <style> tags will get inlined automatically by default. With Mandrill, you can enable this functionality (although it's disabled by default for performance reasons) by checking the "Inline CSS Styles in HTML Emails" box in the "Sending Defaults" section of the Settings tab:

These are all too long.

Just use:

new Date(System.currentTimeMillis())

I had the same problem but from IIS in visual studio, I went to project properties -> Web -> and project url change http to https

Type-inference for factory methods

I don't know if this has been posted already (I scanned the first post, couldn't find it).

This is best shown with an example, assuming you have this class (to simulate a tuple), in in an attempt to demonstrate all the language features that make this possible I will go through it step by step.

public class Tuple<V1, V2> : Tuple
{
    public readonly V1 v1;
    public readonly V2 v2;

    public Tuple(V1 v1, V2 v2)
    {
      this.v1 = v1;
      this.v2 = v2;
    }
}

Everyone knows how to create an instance of it, such as:

Tuple<int, string> tup = new Tuple<int, string>(1, "Hello, World!");

Not exactly rocket science, now we can of course change the type declaration of the variable to var, like this:

var tup = new Tuple<int, string>(1, "Hello, World!");

Still well known, to digress a bit here's a static method with type parameters, which everyone should be familiar with:

public static void Create<T1, T2>()
{
    // stuff
}

Calling it is, again common knowledge, done like this:

Create<float, double>();

What most people don't know is that if the arguments to the generic method contains all the types it requires they can be inferred, for example:

public static void Create<T1, T2>(T1 a, T2 b)
{
    // stuff
}

These two calls are identical:

Create<float, string>(1.0f, "test");
Create(1.0f, "test");

Since T1 and T2 is inferred from the arguments you passed. Combining this knowledge with the var keyword, we can by adding a second static class with a static method, such as:

public abstract class Tuple
{
    public static Tuple<V1, V2> Create<V1, V2>(V1 v1, V2 v2)
    {
        return new Tuple<V1, V2>(v1, v2);
    }
}

Achieve this effect:

var tup = Tuple.Create(1, "Hello, World!");

This means that the types of the: variable "tup", the type-parameters of "Create" and the return value of "Create" are all inferred from the types you pass as arguments to Create

The full code looks something like this:

public abstract class Tuple
{
    public static Tuple<V1, V2> Create<V1, V2>(V1 v1, V2 v2)
    {
        return new Tuple<V1, V2>(v1, v2);
    }
}

public class Tuple<V1, V2> : Tuple
{
    public readonly V1 v1;
    public readonly V2 v2;

    public Tuple(V1 v1, V2 v2)
    {
        this.v1 = v1;
        this.v2 = v2;
    }
}

// Example usage:
var tup = Tuple.Create(1, "test");

Which gives you fully type inferred factory methods everywhere!

I know this is an old post, but a good time to use PrimaryKeyColumn would be if you wanted a unidirectional relationship or had multiple tables all sharing the same id.

In general this is a bad idea and it would be better to use foreign key relationships with JoinColumn.

Having said that, if you are working on an older database that used a system like this then that would be a good time to use it.

Technically you can specify the accept attribute (alternative in html5) on the input element, but it's not properly supported.

I was also getting the same issue. I resolved this issue by updating the chromedriver. So if anyone is facing same issue with chrome browser just update your chromedriver.

There are some great answers here, here is another great analogy for explaining what mutex is:

Consider single toilet with a key. When someone enters, they take the key and the toilet is occupied. If someone else needs to use the toilet, they need to wait in a queue. When the person in the toilet is done, they pass the key to the next person in queue. Make sense, right?

Convert the toilet in the story to a shared resource, and the key to a mutex. Taking the key to the toilet (acquire a lock) permits you to use it. If there is no key (the lock is locked) you have to wait. When the key is returned by the person (release the lock) you're free to acquire it now.

async function FileToString (file) {
    try {
        let res = await file.raw.text();
        console.log(res);
    } catch (err) {
        throw err;
    }
}

In my case, I had CUDA already installed from the Ubuntu version and cmake would detect that one instead of the newly installed version using the NVidia SDK Manager.

I ran dpkg -l | grep cuda and could see both versions.

What I had to do is uninstall the old CUDA (version 9.1 in my case) and leave the new version alone (version 10.2). I used the purge command like so:

sudo apt-get purge libcudart9.1 nvidia-cuda-dev nvidia-cuda-doc \
                                nvidia-cuda-gdb nvidia-cuda-toolkit

Please verify that the package names match the version you want to remove from your installation.

I had to rerun cmake from a blank BUILD directory to redirect all the #include and libraries to the SDK version (since the old paths were baked in the existing build environment).

Another method is to use the pad keyword from plt.subplots_adjust(), which also accepts negative values:

import matplotlib.pyplot as plt

ax = [plt.subplot(2,2,i+1) for i in range(4)]

for a in ax:
    a.set_xticklabels([])
    a.set_yticklabels([])

plt.subplots_adjust(pad=-5.0)

Additionally, to remove the white at the outer fringe of all subplots (i.e. the canvas), always save with plt.savefig(fname, bbox_inches="tight").

since openssl v1.1.0

C:\openssl>openssl version
OpenSSL 1.1.0g  2 Nov 2017
C:\openssl>openssl s_client -proxy 192.168.103.115:3128 -connect www.google.com -CAfile C:\TEMP\internalCA.crt
CONNECTED(00000088)
depth=2 DC = com, DC = xxxx, CN = xxxx CA interne
verify return:1
depth=1 C = FR, L = CROIX, CN = svproxysg1, emailAddress = [email protected]
verify return:1
depth=0 C = US, ST = California, L = Mountain View, O = Google Inc, CN = www.google.com
verify return:1
---
Certificate chain
 0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com
   i:/C=xxxx/L=xxxx/CN=svproxysg1/[email protected]
 1 s:/C=xxxx/L=xxxx/CN=svproxysg1/[email protected]
   i:/DC=com/DC=xxxxx/CN=xxxxx CA interne
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIDkTCCAnmgAwIBAgIJAIv4/hQAAAAAMA0GCSqGSIb3DQEBCwUAMFIxCzAJBgNV
BAYTAkZSMQ4wDAYDVQQHEwVDUk9JWDETMBEGA1UEAxMKc3Zwcm94eXNnMTEeMBwG

I was doing this mistake

ForEach ($server in $servers) {
$OS = Get-WmiObject win32_operatingsystem -ComputerName $server
}

Which, of course, couldn't be passed, because output of the server in a csv file was @{Name=hv1g.contoso.com}

I had to call the property from csv file like this $server.Name

ForEach ($server in $servers) {
$OS = Get-WmiObject win32_operatingsystem -ComputerName $server.Name
}

It fixed my issue.

Try this:

First change your controller

    yourModuleName.controller("yourControllerName", function ($scope) {
        var list = [
            { H1:'A', H2:'B', H3:'C', H4:'d' },
            { H1:'E', H2:'B', H3:'F', H4:'G' },
            { H1:'C', H2:'H', H3:'L', H4:'M' },
            { H1:'I', H2:'B', H3:'E', H4:'A' }
        ];

        $scope.list = list;

        $scope.headers = ["Header1", "Header2", "Header3", "Header4"];

        $scope.sortColumn = 'Header1';

        $scope.reverseSort = false;

        $scope.sortData = function (columnIndex) {
            $scope.reverseSort = ($scope.sortColumn == $scope.headers[columnIndex]) ? !$scope.reverseSort : false;

            $scope.sortColumn = $scope.headers[columnIndex];
        }

    });

then change code in html side like this

    <th ng-repeat= "header in headers">
            <a ng-click="sortData($index)"> {{headers[$index]}} </a>
    </th>
    <tr ng-repeat "result in results | orderBy : sortColumn : reverseSort">
        <td> {{results.h1}} </td>
        <td> {{results.h2}} </td>
        <td> {{results.h3}} </td>
        <td> {{results.h4}} </td>
    </tr>

1) Normally, you would want to return a Task. The main exception should be when you need to have a void return type (for events). If there's no reason to disallow having the caller await your task, why disallow it?

2) async methods that return void are special in another aspect: they represent top-level async operations, and have additional rules that come into play when your task returns an exception. The easiest way is to show the difference is with an example:

static async void f()
{
    await h();
}

static async Task g()
{
    await h();
}

static async Task h()
{
    throw new NotImplementedException();
}

private void button1_Click(object sender, EventArgs e)
{
    f();
}

private void button2_Click(object sender, EventArgs e)
{
    g();
}

private void button3_Click(object sender, EventArgs e)
{
    GC.Collect();
}

f's exception is always "observed". An exception that leaves a top-level asynchronous method is simply treated like any other unhandled exception. g's exception is never observed. When the garbage collector comes to clean up the task, it sees that the task resulted in an exception, and nobody handled the exception. When that happens, the TaskScheduler.UnobservedTaskException handler runs. You should never let this happen. To use your example,

public static async void AsyncMethod2(int num)
{
    await Task.Factory.StartNew(() => Thread.Sleep(num));
}

Yes, use async and await here, they make sure your method still works correctly if an exception is thrown.

for more information see: http://msdn.microsoft.com/en-us/magazine/jj991977.aspx

Some things to note:

You should always declare your enum inside a namespace as enums are not proper namespaces and you will be tempted to use them like one.

Always have a break at the end of each switch clause execution will continue downwards to the end otherwise.

Always include the default: case in your switch.

Use variables of enum type to hold enum values for clarity.

see here for a discussion of the correct use of enums in C++.

This is what you want to do.

namespace choices
{
    enum myChoice 
    { 
        EASY = 1 ,
        MEDIUM = 2, 
        HARD = 3  
    };
}

int main(int c, char** argv)
{
    choices::myChoice enumVar;
    cin >> enumVar;
    switch (enumVar)
    {
        case choices::EASY:
        {
            // do stuff
            break;
        }
        case choices::MEDIUM:
        {
            // do stuff
            break;
        }

        default:
        {
            // is likely to be an error
        }
    };

}

You can get the channel ID with the username (in your case "klauskkpm") using the filter "forUsername", like this:

https://www.googleapis.com/youtube/v3/channels?key={YOUR_API_KEY}&forUsername=klauskkpm&part=id

More info here: https://developers.google.com/youtube/v3/docs/channels/list

The answer comes from the javadoc of ZoneId (emphasis mine) ...

A ZoneId is used to identify the rules used to convert between an Instant and a LocalDateTime. There are two distinct types of ID:

• Fixed offsets - a fully resolved offset from UTC/Greenwich, that uses the same offset for all local date-times
• Geographical regions - an area where a specific set of rules for finding the offset from UTC/Greenwich apply

Most fixed offsets are represented by ZoneOffset. Calling normalized() on any ZoneId will ensure that a fixed offset ID will be represented as a ZoneOffset.

... and from the javadoc of ZoneId#of (emphasis mine):

This method parses the ID producing a ZoneId or ZoneOffset. A ZoneOffset is returned if the ID is 'Z', or starts with '+' or '-'.

The argument id is specified as "UTC", therefore it will return a ZoneId with an offset, which also presented in the string form:

System.out.println(now.withZoneSameInstant(ZoneOffset.UTC));
System.out.println(now.withZoneSameInstant(ZoneId.of("UTC")));

Outputs:

2017-03-10T08:06:28.045Z
2017-03-10T08:06:28.045Z[UTC]

As you use the equals method for comparison, you check for object equivalence. Because of the described difference, the result of the evaluation is false.

When the normalized() method is used as proposed in the documentation, the comparison using equals will return true, as normalized() will return the corresponding ZoneOffset:

Normalizes the time-zone ID, returning a ZoneOffset where possible.

now.withZoneSameInstant(ZoneOffset.UTC)
    .equals(now.withZoneSameInstant(ZoneId.of("UTC").normalized())); // true

As the documentation states, if you use "Z" or "+0" as input id, of will return the ZoneOffset directly and there is no need to call normalized():

now.withZoneSameInstant(ZoneOffset.UTC).equals(now.withZoneSameInstant(ZoneId.of("Z"))); //true
now.withZoneSameInstant(ZoneOffset.UTC).equals(now.withZoneSameInstant(ZoneId.of("+0"))); //true

To check if they store the same date time, you can use the isEqual method instead:

now.withZoneSameInstant(ZoneOffset.UTC)
    .isEqual(now.withZoneSameInstant(ZoneId.of("UTC"))); // true

Sample

System.out.println("equals - ZoneId.of(\"UTC\"): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("UTC"))));
System.out.println("equals - ZoneId.of(\"UTC\").normalized(): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("UTC").normalized())));
System.out.println("equals - ZoneId.of(\"Z\"): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("Z"))));
System.out.println("equals - ZoneId.of(\"+0\"): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("+0"))));
System.out.println("isEqual - ZoneId.of(\"UTC\"): "+ nowZoneOffset
        .isEqual(now.withZoneSameInstant(ZoneId.of("UTC"))));

Output:

equals - ZoneId.of("UTC"): false
equals - ZoneId.of("UTC").normalized(): true
equals - ZoneId.of("Z"): true
equals - ZoneId.of("+0"): true
isEqual - ZoneId.of("UTC"): true

This is what I think is the best solution. Google Analytics is injected this way.

var (function(){
    var p="https:" == document.location.protocol ? "https://" : "http://";
        d=document,
        g=d.createElement('script'),
        s=d.getElementsByTagName('script')[0];
        g.type='text/javascript';
        g.src=p+'url-to-your-script.js';
        s.parentNode.insertBefore(g,s); })();

Look at the r.status_code attribute:

if r.status_code == 404:
    # A 404 was issued.

Demo:

>>> import requests
>>> r = requests.get('http://httpbin.org/status/404')
>>> r.status_code
404

If you want requests to raise an exception for error codes (4xx or 5xx), call r.raise_for_status():

>>> r = requests.get('http://httpbin.org/status/404')
>>> r.raise_for_status()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "requests/models.py", line 664, in raise_for_status
    raise http_error
requests.exceptions.HTTPError: 404 Client Error: NOT FOUND
>>> r = requests.get('http://httpbin.org/status/200')
>>> r.raise_for_status()
>>> # no exception raised.

You can also test the response object in a boolean context; if the status code is not an error code (4xx or 5xx), it is considered ‘true’:

if r:
    # successful response

If you want to be more explicit, use if r.ok:.

Control characters:

(Hex codes assume an ASCII-compatible character encoding.)

• \a = \x07 = alert (bell)
• \b = \x08 = backspace
• \t = \x09 = horizonal tab
• \n = \x0A = newline (or line feed)
• \v = \x0B = vertical tab
• \f = \x0C = form feed
• \r = \x0D = carriage return
• \e = \x1B = escape (non-standard GCC extension)

Punctuation characters:

• \" = quotation mark (backslash not required for '"')
• \' = apostrophe (backslash not required for "'")
• \? = question mark (used to avoid trigraphs)
• \\ = backslash

Numeric character references:

• \ + up to 3 octal digits
• \x + any number of hex digits
• \u + 4 hex digits (Unicode BMP, new in C++11)
• \U + 8 hex digits (Unicode astral planes, new in C++11)

\0 = \00 = \000 = octal ecape for null character

If you do want an actual digit character after a \0, then yes, I recommend string concatenation. Note that the whitespace between the parts of the literal is optional, so you can write "\0""0".

I realize this question is a bit dated and since it shows up on Google search for similar issue I thought I will expand a little bit more on top of @CowWarrior's answer. I was looking for somewhat similar solution, and after scouring through countless SO question/answers and Bootstrap documentations the solution was pretty simple. Again, this would be using inbuilt Bootstrap collapse class to show/hide divs and Bootstrap's "Collapse Event".

What I realized is that it is easy to do it using a Bootstrap Accordion, but most of the time even though the functionality required is "somewhat" similar to an Accordion, it's different in a way that one would want to show hide <div> based on, lets say, menu buttons on a navbar. Below is a simple solution to this. The anchor tags (<a>) could be navbar items and based on a collapse event the corresponding div will replace the existing div. It looks slightly sloppy in CodeSnippet, but it is pretty close to achieving the functionality-

All that the JavaScript does is makes all the other <div> hide using

$(".main-container.collapse").not($(this)).collapse('hide');

when the loaded <div> is displayed by checking the Collapse event shown.bs.collapse. Here's the Bootstrap documentation on Collapse Event.

Note: main-container is just a custom class.

Here it goes-

$(".main-container.collapse").on('shown.bs.collapse', function () {    _x000D_
//when a collapsed div is shown hide all other collapsible divs that are visible_x000D_
       $(".main-container.collapse").not($(this)).collapse('hide');_x000D_
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>_x000D_
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
_x000D_
<a href="#Foo" class="btn btn-default" data-toggle="collapse">Toggle Foo</a>_x000D_
<a href="#Bar" class="btn btn-default" data-toggle="collapse">Toggle Bar</a>_x000D_
_x000D_
<div id="Bar" class="main-container collapse in">_x000D_
    This div (#Bar) is shown by default and can toggle_x000D_
</div>_x000D_
<div id="Foo" class="main-container collapse">_x000D_
    This div (#Foo) is hidden by default_x000D_
</div>

The value of a button element isn't the displayed text, contrary to what happens to input elements of type button.

You can do this :

 b.appendChild(document.createTextNode('test value'));

Demonstration

@media (max-width: 767px) {
    footer .text-right, 
    footer .text-left {
        text-align: center;
    } 
}

I updated @loddn's answer, making two changes

• max-width of xs screens in bootstrap is 767px (768px is the start of sm screens)
• (this one is a matter of preference) I used footer instead of col-* so that if the column widths change, the CSS doesn't need to be updated.

You should not use su in a dockerfile, however you should use the USER instruction in the Dockerfile.

At each stage of the Dockerfile build, a new container is created so any change you make to the user will not persist on the next build stage.

For example:

RUN whoami
RUN su test
RUN whoami

This would never say the user would be test as a new container is spawned on the 2nd whoami. The output would be root on both (unless of course you run USER beforehand).

If however you do:

RUN whoami
USER test
RUN whoami

You should see root then test.

Alternatively you can run a command as a different user with sudo with something like

sudo -u test whoami

But it seems better to use the official supported instruction.

I appreciate this is an old question now but my solution wasn't an answer on here so posting it in case anyone else tries all the rest.

In my case, a previous install of the Java JRE (in ProgramData/Oracle/Java) had a path variable at the top of my list of path variables. The contents of that "Oracle" path had a java.exe but not a javac.exe. I added my full JDK path to the top of the list of path variables, ahead of the "Oracle" one, and it then picked up javac.exe as well as java.

In terms of reduce, and concat it can be expressed in Java 8 as:

String fromFile = new BufferedReader(new   
InputStreamReader(inputStream)).lines().reduce(String::concat).get();

I know the question has been answered, but in my case I was trying to send the content of a text file to the Slack Webhook api and for some reason the above answer did not work. Anywho, this is what finally did the trick for me:

curl -X POST -H --silent --data-urlencode "payload={\"text\": \"$(cat file.txt | sed "s/\"/'/g")\"}" https://hooks.slack.com/services/XXX

Another solution is to use CSS adjacency and use h4 (or higher):

#### note

This is the note content

h4 {
  display: none; /* hide */
}

h4 + p {
  /* style the note however you want */
}