Change the mouse pointer using JavaScript

document.body.style.cursor = 'cursorurl';

Scrollview can host only one direct child

Wrap all the children inside of another LinearLayout with wrap_content for both the width and the height as well as the vertical orientation.

How to remove all options from a dropdown using jQuery / JavaScript

You can either use .remove() on option elements:

.remove() : Remove the set of matched elements from the DOM.

 $('#models option').remove(); or $('#models').remove('option');

or use .empty() on select:

.empty() : Remove all child nodes of the set of matched elements from the DOM.

 $('#models').empty();

however to repopulate deleted options, you need to store the option while deleting.

You can also achieve the same using show/hide:

$("#models option").hide();

and later on to show them:

$("#models option").show();

How to remove specific value from array using jQuery

You can use underscore.js. It really makes things simple.

In your case all the code that you will have to write is -

_.without([1,2,3], 2);

and the result will be [1,3].

It reduces the code that you write.

Can we add div inside table above every <tr>?

You can't put a div directly inside a table but you can put div inside td or th element.

For that you need to do is make sure the div is inside an actual table cell, a td or th element, so do that:

HTML:-

<tr>
  <td>
    <div>
      <p>I'm text in a div.</p>
    </div>
  </td>
</tr>

For more information :-

http://css-tricks.com/using-divs-inside-tables/

Programmatically center TextView text

try this method

  public void centerTextView(LinearLayout linearLayout) {
    TextView textView = new TextView(context);
    textView.setText(context.getString(R.string.no_records));
    textView.setTypeface(Typeface.DEFAULT_BOLD);
    textView.setGravity(Gravity.CENTER);
    textView.setTextSize(18.0f);
    textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
    linearLayout.addView(textView);
}

Styling an input type="file" button

jquery version of teshguru script for automatically detect input[file] and style

<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
<style>
#yourBtn{
   position: relative;
       top: 150px;
   font-family: calibri;
   width: 150px;
   padding: 10px;
   -webkit-border-radius: 5px;
   -moz-border-radius: 5px;
   border: 1px dashed #BBB; 
   text-align: center;
   background-color: #DDD;
   cursor:pointer;
  }
</style>
<script type="text/javascript">
$(document).ready(function()
{
    $('input[type=file]').each(function()
    {
        $(this).attr('onchange',"sub(this)");
        $('<div id="yourBtn" onclick="getFile()">click to upload a file</div>').insertBefore(this);
        $(this).wrapAll('<div style="height: 0px;width: 0px; overflow:hidden;"></div>');
    });
});
 function getFile(){
   $('input[type=file]').click();
 }
 function sub(obj){
    var file = obj.value;
    var fileName = file.split("\\");
    document.getElementById("yourBtn").innerHTML = fileName[fileName.length-1];
 }
</script>
</head>
<body>
<?php 
    var_dump($_FILES);
?>
<center>
<form action="" method="post" enctype="multipart/form-data" name="myForm">

<input id="upfile" name="file" type="file" value="upload"/>
<input type="submit" value='submit' >
</form>
</center>
</body>
</html>

How can I embed a YouTube video on GitHub wiki pages?

It's not possible to embed videos directly, but you can put an image which links to a YouTube video:

[![IMAGE ALT TEXT HERE](https://img.youtube.com/vi/YOUTUBE_VIDEO_ID_HERE/0.jpg)](https://www.youtube.com/watch?v=YOUTUBE_VIDEO_ID_HERE)

For more information about Markdown look at this Markdown cheatsheet on GitHub.
For more information about Youtube image links look this question.

Error: fix the version conflict (google-services plugin)

For fire base to install properly all the versions of the fire base compiles must be in same version so

compile 'com.google.firebase:firebase-messaging:11.0.4' 
compile 'com.google.android.gms:play-services-maps:11.0.4' 
compile 'com.google.android.gms:play-services-location:11.0.4'

this is the correct way to do it.

Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?

For a lot of projects, there is actually 0% difference between the different pythons in terms of speed. That is those that are dominated by engineering time and where all pythons have the same amount of library support.

How to get/generate the create statement for an existing hive table?

Steps to generate Create table DDLs for all the tables in the Hive database and export into text file to run later:

step 1)
create a .sh file with the below content, say hive_table_ddl.sh

#!/bin/bash
rm -f tableNames.txt
rm -f HiveTableDDL.txt
hive -e "use $1; show tables;" > tableNames.txt  
wait
cat tableNames.txt |while read LINE
   do
   hive -e "use $1;show create table $LINE;" >>HiveTableDDL.txt
   echo  -e "\n" >> HiveTableDDL.txt
   done
rm -f tableNames.txt
echo "Table DDL generated"

step 2)

Run the above shell script by passing 'db name' as paramanter

>bash hive_table_dd.sh <<databasename>>

output :

All the create table statements of your DB will be written into the HiveTableDDL.txt

Declare variable in SQLite and use it

I appreciate that the other solutions do not depend on any other software tool, but why not just use another programming language that can interface to SQLite such as C#, C++, Go, Haskell, Java, Lua, Python, or Rust?

Client on Node.js: Uncaught ReferenceError: require is not defined

I confirm. We must add:

webPreferences: {
    nodeIntegration: true
}

For example:

mainWindow = new BrowserWindow({webPreferences: {
    nodeIntegration: true
}});

For me, the problem has been resolved with that.

SSIS Excel Connection Manager failed to Connect to the Source

As discussed in the below:

Solution: Go to https://marketplace.visualstudio.com/items?itemName=ProBITools.MicrosoftAnalysisServicesModelingProjects and install the latest version, it has a fix in there to resolve this issue.

Reference: https://developercommunity.visualstudio.com/content/problem/745991/could-not-load-file-or-assembly-microsoftdatawareh.html

A fix for this issue has been internally implemented and is being prepared for release. We’ll update you once it becomes available for download. For now, please install latest SSAS from https://marketplace.visualstudio.com/items?itemName=ProBITools.MicrosoftAnalysisServicesModelingProjects to work around the issue. Sorry for any inconvenience.

How to install plugins to Sublime Text 2 editor?

The instruction has been tested on Mac OSx Catalina.

After installing Sublime Text 3, install Package Control through Tools > Package Control. Use the following instructions to install package or theme:

press CMD + SHIFT + P
choose Package Control: Install Package---or any other options you require.
enter the name of required package or theme and press enter.

String contains - ignore case

If you won't go with regex:

"ABCDEFGHIJKLMNOP".toLowerCase().contains("gHi".toLowerCase())

Find duplicates and delete all in notepad++

If it is possible to change the sequence of the lines you could do:

sort line with Edit -> Line Operations -> Sort Lines Lexicographically ascending
do a Find / Replace:
- Find What: ^(.*\r?\n)\1+
- Replace with: (Nothing, leave empty)
- Check Regular Expression in the lower left
- Click Replace All

How it works: The sorting puts the duplicates behind each other. The find matches a line ^(.*\r?\n) and captures the line in \1 then it continues and tries to find \1 one or more times (+) behind the first match. Such a block of duplicates (if it exists) is replaced with nothing.

The \r?\n should deal nicely with Windows and Unix lineendings.

Where do I find old versions of Android NDK?

Simply replacing .bin with .tar.bz2 is not enough, for NDK releases older than 10b. For example, https://dl.google.com/android/ndk/android-ndk-r10b-linux-x86_64.tar.bz2 is not a valid link.

Turned out that the correct link for 10b was: https://dl.google.com/android/ndk/android-ndk32-r10b-linux-x86_64.tar.bz2 (note the additional '32'). However, this doesn't seem to apply to e.g. 10a, as this link doesn't work: https://dl.google.com/android/ndk/android-ndk32-r10a-linux-x86_64.tar.bz2 .

Bottom line: use http://web.archive.org until Google fixes this, if ever...

Regular Expression for password validation

Try this ( also corrected check for upper case and lower case, it had a bug since you grouped them as [a-zA-Z] it only looks for atleast one lower or upper. So separated them out ):

(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)^(.{8,15})$

Update: I found that the regex doesn't really work as expected and this is not how it is supposed to be written too!

Try something like this:

(?=^.{8,15}$)(?=.*\d)(?=.*[A-Z])(?=.*[a-z])(?!.*\s).*$

(Between 8 and 15 inclusive, contains atleast one digit, atleast one upper case and atleast one lower case and no whitespace.)

And I think this is easier to understand as well.

_csv.Error: field larger than field limit (131072)

The csv file might contain very huge fields, therefore increase the field_size_limit:

import sys
import csv

csv.field_size_limit(sys.maxsize)

sys.maxsize works for Python 2.x and 3.x. sys.maxint would only work with Python 2.x (SO: what-is-sys-maxint-in-python-3)

Update

As Geoff pointed out, the code above might result in the following error: OverflowError: Python int too large to convert to C long. To circumvent this, you could use the following quick and dirty code (which should work on every system with Python 2 and Python 3):

import sys
import csv
maxInt = sys.maxsize

while True:
    # decrease the maxInt value by factor 10 
    # as long as the OverflowError occurs.

    try:
        csv.field_size_limit(maxInt)
        break
    except OverflowError:
        maxInt = int(maxInt/10)

Convert JSON to DataTable

Deserialize your jsonstring to some class

List<User> UserList = JsonConvert.DeserializeObject<List<User>>(jsonString);

Write following extension method to your project

public static DataTable ToDataTable<T>(this IList<T> data)
{
    PropertyDescriptorCollection props =
    TpeDescriptor.GetProperties(typeof(T));
    DataTable table = new DataTable();
    for(int i = 0 ; i < props.Count ; i++)
    {
        PropertyDescriptor prop = props[i];
        table.Columns.Add(prop.Name, prop.PropertyType);
    }
    object[] values = new object[props.Count];
    foreach (T item in data)
    {
        for (int i = 0; i < values.Length; i++)
        {
            values[i] = props[i].GetValue(item);
        }
        table.Rows.Add(values);
    }
    return table;        
}

Call extension method like

UserList.ToDataTable<User>();

How can I check whether a numpy array is empty or not?

You can always take a look at the .size attribute. It is defined as an integer, and is zero (0) when there are no elements in the array:

import numpy as np
a = np.array([])

if a.size == 0:
    # Do something when `a` is empty

Youtube - downloading a playlist - youtube-dl

In a shell, & is a special character, advising the shell to start everything up to the & as a process in the background. To avoid this behavior, you can put the URL in quotes. See the youtube-dl FAQ for more information.

Also beware of -citk. With the exception of -i, these options make little sense. See the youtube-dl FAQ for more information. Even -f mp4 looks very strange.

So what you want is:

youtube-dl -i -f mp4 --yes-playlist 'https://www.youtube.com/watch?v=7Vy8970q0Xc&list=PLwJ2VKmefmxpUJEGB1ff6yUZ5Zd7Gegn2'

Alternatively, you can just use the playlist ID:

youtube-dl -i PLwJ2VKmefmxpUJEGB1ff6yUZ5Zd7Gegn2

IIS7 Settings File Locations

It sounds like you're looking for applicationHost.config, which is located in C:\Windows\System32\inetsrv\config.

Yes, it's an XML file, and yes, editing the file by hand will affect the IIS config after a restart. You can think of IIS Manager as a GUI front-end for editing applicationHost.config and web.config.

How to export non-exportable private key from store

Gentil Kiwi's answer is correct. He developed this mimikatz tool that is able to retrieve non-exportable private keys.

However, his instructions are outdated. You need:

Download the lastest release from https://github.com/gentilkiwi/mimikatz/releases
Run the cmd with admin rights in the same machine where the certificate was requested
Change to the mimikatz bin directory (Win32 or x64 version)
Run mimikatz
Follow the wiki instructions and the .pfx file (protected with password mimikatz) will be placed in the same folder of the mimikatz bin

mimikatz # crypto::capi
Local CryptoAPI patched

mimikatz # privilege::debug
Privilege '20' OK

mimikatz # crypto::cng
"KeyIso" service patched

mimikatz # crypto::certificates /systemstore:local_machine /store:my /export
* System Store : 'local_machine' (0x00020000)
* Store : 'my'

example.domain.local
     Key Container : example.domain.local
     Provider : Microsoft Software Key Storage Provider
     Type : CNG Key (0xffffffff)
     Exportable key : NO
     Key size : 2048
     Public export : OK - 'local_machine_my_0_example.domain.local.der'
     Private export : OK - 'local_machine_my_0_example.domain.local.pfx'

How to open mail app from Swift

You should try sending with built-in mail composer, and if that fails, try with share:

func contactUs() {

    let email = "[email protected]" // insert your email here
    let subject = "your subject goes here"
    let bodyText = "your body text goes here"

    // https://developer.apple.com/documentation/messageui/mfmailcomposeviewcontroller
    if MFMailComposeViewController.canSendMail() {

        let mailComposerVC = MFMailComposeViewController()
        mailComposerVC.mailComposeDelegate = self as? MFMailComposeViewControllerDelegate

        mailComposerVC.setToRecipients([email])
        mailComposerVC.setSubject(subject)
        mailComposerVC.setMessageBody(bodyText, isHTML: false)

        self.present(mailComposerVC, animated: true, completion: nil)

    } else {
        print("Device not configured to send emails, trying with share ...")

        let coded = "mailto:\(email)?subject=\(subject)&body=\(bodyText)".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
        if let emailURL = URL(string: coded!) {
            if #available(iOS 10.0, *) {
                if UIApplication.shared.canOpenURL(emailURL) {
                    UIApplication.shared.open(emailURL, options: [:], completionHandler: { (result) in
                        if !result {
                            print("Unable to send email.")
                        }
                    })
                }
            }
            else {
                UIApplication.shared.openURL(emailURL as URL)
            }
        }
    }
}

Disabling enter key for form

For a non-javascript solution, try putting a <button disabled>Submit</button> into your form, positioned before any other submit buttons/inputs. I suggest immediately after the <form> opening tag (and using CSS to hide it, accesskey='-1' to get it out of the tab sequence, etc)

AFAICT, user agents look for the first submit button when ENTER is hit in an input, and if that button is disabled will then stop looking for another.

A form element's default button is the first submit button in tree order whose form owner is that form element.

If the user agent supports letting the user submit a form implicitly (for example, on some platforms hitting the "enter" key while a text field is focused implicitly submits the form), then doing so for a form whose default button has a defined activation behavior must cause the user agent to run synthetic click activation steps on that default button.

Consequently, if the default button is disabled, the form is not submitted when such an implicit submission mechanism is used. (A button has no activation behavior when disabled.)

https://www.w3.org/TR/html5/forms.html#implicit-submission

However, I do know that Safari 10 MacOS misbehaves here, submitting the form even if the default button is disabled.

So, if you can assume javascript, insert <button onclick="return false;">Submit</button> instead. On ENTER, the onclick handler will get called, and since it returns false the submission process stops. Browsers I've tested this with won't even do the browser-validation thing (focussing the first invalid form control, displaying an error message, etc).

Update Multiple Rows in Entity Framework from a list of ids

I think you are looking for below method:

var idList=new int[]{1, 2, 3, 4};
using (var db=new SomeDatabaseContext())
{
    var friends= db.Friends.Where(f=>idList.Contains(f.ID));
    friends.ForEachAsync(a=>a.msgSentBy='1234');
    await db.SaveChangesAsync();
}

This should be the efficient way of handling this.

Is it possible to capture a Ctrl+C signal and run a cleanup function, in a "defer" fashion?

This works:

package main

import (
    "fmt"
    "os"
    "os/signal"
    "syscall"
    "time" // or "runtime"
)

func cleanup() {
    fmt.Println("cleanup")
}

func main() {
    c := make(chan os.Signal)
    signal.Notify(c, os.Interrupt, syscall.SIGTERM)
    go func() {
        <-c
        cleanup()
        os.Exit(1)
    }()

    for {
        fmt.Println("sleeping...")
        time.Sleep(10 * time.Second) // or runtime.Gosched() or similar per @misterbee
    }
}

How do I resolve a HTTP 414 "Request URI too long" error?

An excerpt from the RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1:

The POST method is used to request that the origin server accept the entity enclosed in the request as a new subordinate of the resource identified by the Request-URI in the Request-Line. POST is designed to allow a uniform method to cover the following functions:

Annotation of existing resources;

Posting a message to a bulletin board, newsgroup, mailing list, or similar group of articles;

Providing a block of data, such as the result of submitting a form, to a data-handling process;

Extending a database through an append operation.

Reading a string with scanf

An array "decays" into a pointer to its first element, so scanf("%s", string) is equivalent to scanf("%s", &string[0]). On the other hand, scanf("%s", &string) passes a pointer-to-char[256], but it points to the same place.

Then scanf, when processing the tail of its argument list, will try to pull out a char *. That's the Right Thing when you've passed in string or &string[0], but when you've passed in &string you're depending on something that the language standard doesn't guarantee, namely that the pointers &string and &string[0] -- pointers to objects of different types and sizes that start at the same place -- are represented the same way.

I don't believe I've ever encountered a system on which that doesn't work, and in practice you're probably safe. None the less, it's wrong, and it could fail on some platforms. (Hypothetical example: a "debugging" implementation that includes type information with every pointer. I think the C implementation on the Symbolics "Lisp Machines" did something like this.)

Append text to file from command line without using io redirection

You can use the --append feature of tee:

cat file01.txt | tee --append bothFiles.txt 
cat file02.txt | tee --append bothFiles.txt

Or shorter,

cat file01.txt file02.txt | tee --append bothFiles.txt

I assume the request for no redirection (>>) comes from the need to use this in xargs or similar. So if that doesn't count, you can mute the output with >/dev/null.

Responsive timeline UI with Bootstrap3

"Timeline (responsive)" snippet:

This looks very, very close to what your example shows. The bootstrap snippet linked below covers all the bases you are looking for. I've been considering it myself, with the same requirements you have ( especially responsiveness ). This morphs well between screen sizes and devices.

You can fork this and use it as a great starting point for your specific expectations:

http://bootsnipp.com/snippets/featured/timeline-responsive

Here are two screenshots I took for you... wide and thin:

wide thin

Convert JSON string to dict using Python

use simplejson or cjson for speedups

import simplejson as json

json.loads(obj)

or 

cjson.decode(obj)

Return JSON with error status code MVC

The neatest solution I've found is to create your own JsonResult that extends the original implementation and allows you to specify a HttpStatusCode:

public class JsonHttpStatusResult : JsonResult
{
    private readonly HttpStatusCode _httpStatus;

    public JsonHttpStatusResult(object data, HttpStatusCode httpStatus)
    {
        Data = data;
        _httpStatus = httpStatus;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        context.RequestContext.HttpContext.Response.StatusCode = (int)_httpStatus;
        base.ExecuteResult(context);
    }
}

You can then use this in your controller action like so:

if(thereWereErrors)
{
    var errorModel = new { error = "There was an error" };
    return new JsonHttpStatusResult(errorModel, HttpStatusCode.InternalServerError);
}

Use "ENTER" key on softkeyboard instead of clicking button

<EditText
    android:id="@+id/search"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/search_hint"
    android:inputType="text"
    android:imeOptions="actionSend" />

You can then listen for presses on the action button by defining a TextView.OnEditorActionListener for the EditText element. In your listener, respond to the appropriate IME action ID defined in the EditorInfo class, such as IME_ACTION_SEND. For example:

EditText editText = (EditText) findViewById(R.id.search);
editText.setOnEditorActionListener(new OnEditorActionListener() {
    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        boolean handled = false;
        if (actionId == EditorInfo.IME_ACTION_SEND) {
            sendMessage();
            handled = true;
        }
        return handled;
    }
});

Source: https://developer.android.com/training/keyboard-input/style.html

HTML / CSS Popup div on text click

For the sake of completeness, what you are trying to create is a "modal window".

Numerous JS solutions allow you to create them with ease, take the time to find the one which best suits your needs.

I have used Tinybox 2 for small projects : http://sandbox.scriptiny.com/tinybox2/

what does this mean ? image/png;base64?

That is, you are referencing an image, but instead of providing an external url, the png image data is in the url itself, embedded in the style sheet. data:image/png;base64 tells the browser that the data is inline, is a png image and is in this case base64 encoded. The encoding is needed because png images can contain bytes that are invalid inside a HTML document (or within the HTTP protocol even).

Reload an iframe with jQuery

$( '#iframe' ).attr( 'src', function ( i, val ) { return val; });

Copy every nth line from one sheet to another

In A1 of your new sheet, put this:

=OFFSET(Sheet1!$A$1,(ROW()-1)*7,0)

... and copy down. If you start somewhere other than row 1, change ROW() to ROW(A1) or some other cell on row 1, then copy down again.

If you want to copy the nth line but multiple columns, use the formula:

=OFFSET(Sheet1!A$1,(ROW()-1)*7,0)

This can be copied right too.

Trigger insert old values- values that was updated

    createTRIGGER [dbo].[Table] ON [dbo].[table] 
FOR UPDATE
AS
    declare @empid int;
    declare @empname varchar(100);
    declare @empsal decimal(10,2);
    declare @audit_action varchar(100);
    declare @old_v varchar(100)

    select @empid=i.Col_Name1 from inserted i;  
    select @empname=i.Col_Name2  from inserted i;   
    select @empsal=i.Col_Name2 from inserted i;
    select @old_v=d.Col_Name from deleted d

    if update(Col_Name1)
        set @audit_action='Updated Record -- After Update Trigger.';
    if update(Col_Name2)
        set @audit_action='Updated Record -- After Update Trigger.';

    insert into Employee_Test_Audit1(Col_name1,Col_name2,Col_name3,Col_name4,Col_name5,Col_name6(Old_values)) 
    values(@empid,@empname,@empsal,@audit_action,getdate(),@old_v);

    PRINT '----AFTER UPDATE Trigger fired-----.'

Facebook Graph API : get larger pictures in one request

Change the array of fields id,name,picture to id,name,picture.type(large)

https://graph.facebook.com/v2.8/me?fields=id,name,picture.type(large)&access_token=<the_token>

Result:

{
   "id": "130716224073524",
   "name": "Julian Mann",
   "picture": {
      "data": {
         "is_silhouette": false,
         "url": "https://scontent.xx.fbcdn.net/v/t1.0-1/p200x200/15032818_133926070419206_3681208703790460208_n.jpg?oh=a288898d87420cdc7ed8db5602bbb520&oe=58CB5D16"
      }
   }
}

How to "git show" a merge commit with combined diff output even when every changed file agrees with one of the parents?

If you are sitting at the merge commit then this shows the diffs:

git diff HEAD~1..HEAD

If you're not at the merge commit then just replace HEAD with the merge commit. This method seems like the simplest and most intuitive.

.htaccess, order allow, deny, deny from all: confused?

This is a quite confusing way of using Apache configuration directives.

Technically, the first bit is equivalent to

Allow From All

This is because Order Deny,Allow makes the Deny directive evaluated before the Allow Directives. In this case, Deny and Allow conflict with each other, but Allow, being the last evaluated will match any user, and access will be granted.

Now, just to make things clear, this kind of configuration is BAD and should be avoided at all cost, because it borders undefined behaviour.

The Limit sections define which HTTP methods have access to the directory containing the .htaccess file.

Here, GET and POST methods are allowed access, and PUT and DELETE methods are denied access. Here's a link explaining what the various HTTP methods are: http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html

However, it's more than often useless to use these limitations as long as you don't have custom CGI scripts or Apache modules that directly handle the non-standard methods (PUT and DELETE), since by default, Apache does not handle them at all.

It must also be noted that a few other methods exist that can also be handled by Limit, namely CONNECT, OPTIONS, PATCH, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, and UNLOCK.

The last bit is also most certainly useless, since any correctly configured Apache installation contains the following piece of configuration (for Apache 2.2 and earlier):

#
# The following lines prevent .htaccess and .htpasswd files from being 
# viewed by Web clients. 
#
<Files ~ "^\.ht">
    Order allow,deny
    Deny from all
    Satisfy all
</Files>

which forbids access to any file beginning by ".ht".

The equivalent Apache 2.4 configuration should look like:

<Files ~ "^\.ht">
    Require all denied
</Files>

How can I pass some data from one controller to another peer controller

You need to use

 $rootScope.$broadcast()

in the controller that must send datas. And in the one that receive those datas, you use

 $scope.$on

Here is a fiddle that i forked a few time ago (I don't know who did it first anymore

http://jsfiddle.net/patxy/RAVFM/

Adjust icon size of Floating action button (fab)

There are three key XML attributes for custom FABs:

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

Example:

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

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

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

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

React Native Responsive Font Size

I managed to overcome this by doing the following.

Pick the font size you like for the current view you have (Make sure it looks good for the current device you are using in the simulator).
import { Dimensions } from 'react-native' and define the width outside of the component like so: let width = Dimensions.get('window').width;
Now console.log(width) and write it down. If your good looking font size is 15 and your width is 360 for example, then take 360 and divide by 15 ( = 24). This is going to be the important value that is going to adjust to different sizes.

Use this number in your styles object like so: textFontSize: { fontSize = width / 24 },...

Now you have a responsive fontSize.

Python: read all text file lines in loop

There are situations where you can't use the (quite convincing) with... for... structure. In that case, do the following:

line = self.fo.readline()
if len(line) != 0:
     if 'str' in line:
         break

This will work because the the readline() leaves a trailing newline character, where as EOF is just an empty string.

How to set tbody height with overflow scroll

If you want tbody to show a scrollbar, set its display: block;.

Set display: table; for the tr so that it keeps the behavior of a table.

To evenly spread the cells, use table-layout: fixed;.

DEMO tbody scroll

CSS:

table, tr td {
    border: 1px solid red
}
tbody {
    display: block;
    height: 50px;
    overflow: auto;
}
thead, tbody tr {
    display: table;
    width: 100%;
    table-layout: fixed;/* even columns width , fix width of table too*/
}
thead {
    width: calc( 100% - 1em )/* scrollbar is average 1em/16px width, remove it from thead width */
}
table {
    width: 400px;
}

If tbody doesn't show a scroll, because content is less than height or max-height, set the scroll any time with: overflow-y: scroll;. DEMO 2

Important note: this approach to making a table scrollable has drawbacks in some cases. (See comments below.)

Deprecated meaning?

I think the Wikipedia-article on Deprecation answers this one pretty well:

In the process of authoring computer software, its standards or documentation, deprecation is a status applied to software features to indicate that they should be avoided, typically because they have been superseded. Although deprecated features remain in the software, their use may raise warning messages recommending alternative practices, and deprecation may indicate that the feature will be removed in the future. Features are deprecated—rather than immediately removed—in order to provide backward compatibility, and give programmers who have used the feature time to bring their code into compliance with the new standard.

Replace a string in shell script using a variable

Single quotes are very strong. Once inside, there's nothing you can do to invoke variable substitution, until you leave. Use double quotes instead:

echo $LINE | sed -e "s/12345678/$replace/g"

How to get a jqGrid selected row cells value

Use "selrow" to get the selected row Id

var myGrid = $('#myGridId');

var selectedRowId = myGrid.jqGrid("getGridParam", 'selrow');

and then use getRowData to get the selected row at index selectedRowId.

var selectedRowData = myGrid.getRowData(selectedRowId);

If the multiselect is set to true on jqGrid, then use "selarrrow" to get list of selected rows:

var selectedRowIds = myGrid.jqGrid("getGridParam", 'selarrrow');

Use loop to iterate the list of selected rows:

var selectedRowData;

for(selectedRowIndex = 0; selectedRowIndex < selectedRowIds .length; selectedRowIds ++) {

   selectedRowData = myGrid.getRowData(selectedRowIds[selectedRowIndex]);

}

How to make my font bold using css?

Selector name{
font-weight:bold;
}

Suppose you want to make bold for p element

p{
font-weight:bold;
}

You can use other alternative value instead of bold like

p{
 font-weight:bolder;
 font-weight:600;
}

What is the proper declaration of main in C++?

Details on return values and their meaning

Per 3.6.1 ([basic.start.main]):

A return statement in main has the effect of leaving the main function (destroying any objects with automatic storage duration) and calling std::exit with the return value as the argument. If control reaches the end of main without encountering a return statement, the effect is that of executing
return 0;

The behavior of std::exit is detailed in section 18.5 ([support.start.term]), and describes the status code:

Finally, control is returned to the host environment. If status is zero or EXIT_SUCCESS, an implementation-defined form of the status successful termination is returned. If status is EXIT_FAILURE, an implementation-defined form of the status unsuccessful termination is returned. Otherwise the status returned is implementation-defined.

What is a Java String's default initial value?

That depends. Is it just a variable (in a method)? Or a class-member?

If it's just a variable you'll get an error that no value has been set when trying to read from it without first assinging it a value.

If it's a class-member it will be initialized to null by the VM.

How to count the number of files in a directory using Python

This uses os.listdir and works for any directory:

import os
directory = 'mydirpath'

number_of_files = len([item for item in os.listdir(directory) if os.path.isfile(os.path.join(directory, item))])

this can be simplified with a generator and made a little bit faster with:

import os
isfile = os.path.isfile
join = os.path.join

directory = 'mydirpath'
number_of_files = sum(1 for item in os.listdir(directory) if isfile(join(directory, item)))

How to detect if a string contains special characters?

In postgresql you can use regular expressions in WHERE clause. Check http://www.postgresql.org/docs/8.4/static/functions-matching.html

MySQL has something simmilar: http://dev.mysql.com/doc/refman/5.5/en/regexp.html

How can I select all children of an element except the last child?

How to select all children of an element except the last child using CSS?

Answer: this code will work

<style>
.parent *:not(:last-child) { 
  color:red;
}
</style>

<div class='parent'>
  <p>this is paragraph</p>
  <h1>this is heading</h1>
  <b>text is bold</b>
</div>

Get combobox value in Java swing

Method Object JComboBox.getSelectedItem() returns a value that is wrapped by Object type so you have to cast it accordingly.

Syntax:

YourType varName = (YourType)comboBox.getSelectedItem();`
String value = comboBox.getSelectedItem().toString();

How to send parameters from a notification-click to an activity?

It's easy,this is my solution using objects!

My POJO

public class Person implements Serializable{

    private String name;
    private int age;

    //get & set

}

Method Notification

  Person person = new Person();
  person.setName("david hackro");
  person.setAge(10);

    Intent notificationIntent = new Intent(this, Person.class);
    notificationIntent.putExtra("person",person);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.notification_icon)
                .setAutoCancel(true)
                .setColor(getResources().getColor(R.color.ColorTipografiaAdeudos))
                .setPriority(2)
                .setLargeIcon(bm)
                .setTicker(fotomulta.getTitle())
                .setContentText(fotomulta.getMessage())
                .setContentIntent(PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT))
                .setWhen(System.currentTimeMillis())
                .setContentTitle(fotomulta.getTicketText())
                .setDefaults(Notification.DEFAULT_ALL);

New Activity

 private Person person;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_notification_push);
    person = (Person) getIntent().getSerializableExtra("person");
}

Good Luck!!

"find: paths must precede expression:" How do I specify a recursive search that also finds files in the current directory?

Try putting it in quotes:

find . -name '*test.c'

Best Way to View Generated Source of Webpage?

In the Web Developer Toolbar, have you tried the Tools -> Validate HTML or Tools -> Validate Local HTML options?

The Validate HTML option sends the url to the validator, which works well with publicly facing sites. The Validate Local HTML option sends the current page's HTML to the validator, which works well with pages behind a login, or those that aren't publicly accessible.

You may also want to try View Source Chart (also as FireFox add-on). An interesting note there:

Q. Why does View Source Chart change my XHTML tags to HTML tags?

A. It doesn't. The browser is making these changes, VSC merely displays what the browser has done with your code. Most common: self closing tags lose their closing slash (/). See this article on Rendered Source for more information (archive.org).

Plotting dates on the x-axis with Python's matplotlib

I have too low reputation to add comment to @bernie response, with response to @user1506145. I have run in to same issue.

The answer to it is a interval parameter which fixes things up

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import numpy as np
import datetime as dt

np.random.seed(1)

N = 100
y = np.random.rand(N)

now = dt.datetime.now()
then = now + dt.timedelta(days=100)
days = mdates.drange(now,then,dt.timedelta(days=1))

plt.gca().xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d'))
plt.gca().xaxis.set_major_locator(mdates.DayLocator(interval=5))
plt.plot(days,y)
plt.gcf().autofmt_xdate()
plt.show()

Percentage calculation

You can hold onto the percentage as decimal (value \ total) and then when you want to render to a human you can make use of Habeeb's answer or using string interpolation you could have something even cleaner:

var displayPercentage = $"{(decimal)value / total:P}";

//Calculate percentage earlier in code
decimal percentage = (decimal)value / total;
...
//Now render percentage
var displayPercentage = $"{percentage:P}";

What JSON library to use in Scala?

You should check Genson. It just works and is much easier to use than most of the existing alternatives in Scala. It is fast, has many features and integrations with some other libs (jodatime, json4s DOM api...).

All that without any fancy unecessary code like implicits, custom readers/writers for basic cases, ilisible API due to operator overload...

Using it is as easy as:

import com.owlike.genson.defaultGenson_

val json = toJson(Person(Some("foo"), 99))
val person = fromJson[Person]("""{"name": "foo", "age": 99}""")

case class Person(name: Option[String], age: Int)

Disclaimer: I am Gensons author, but that doesn't meen I am not objective :)

How to get the selected index of a RadioGroup in Android

you can do

findViewById

from the radio group .

Here it is sample :

((RadioButton)my_radio_group.findViewById(R.id.radiobtn_veg)).setChecked(true);

Using the && operator in an if statement

So to make your expression work, changing && for -a will do the trick.

It is correct like this:

 if [ -f $VAR1 ] && [ -f $VAR2 ] && [ -f $VAR3 ]
 then  ....

or like

 if [[ -f $VAR1 && -f $VAR2 && -f $VAR3 ]]
 then  ....

or even

 if [ -f $VAR1 -a -f $VAR2 -a -f $VAR3 ]
 then  ....

You can find further details in this question bash : Multiple Unary operators in if statement and some references given there like What is the difference between test, [ and [[ ?.

test attribute in JSTL <c:if> tag

Attributes in JSP tag libraries in general can be either static or resolved at request time. If they are resolved at request time the JSP will resolve their value at runtime and pass the output on to the tag. This means you can put pretty much any JSP code into the attribute and the tag will behave accordingly to what output that produces.

If you look at the jstl taglib docs you can see which attributes are reuest time and which are not. http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/index.html

How to enable Auto Logon User Authentication for Google Chrome

Chrome did change their menus since this question was asked. This solution was tested with Chrome 47.0.2526.73 to 72.0.3626.109.

If you are using Chrome right now, you can check your version with : chrome://version

Goto: chrome://settings

Scroll down to the bottom of the page and click on "Advanced" to show more settings.

OLDER VERSIONS:

Scroll down to the bottom of the page and click on "Show advanced settings..." to show more settings.

In the "System" section, click on "Open proxy settings".

OLDER VERSIONS:

In the "Network" section, click on "Change proxy settings...".

Click on the "Security" tab, then select "Local intranet" icon and click on "Sites" button.

Click on "Advanced" button.

Insert your intranet local address and click on the "Add" button.

Close all windows.

That's it.

jQuery: how to change title of document during .ready()?

If you have got a serverside script get_title.php that echoes the current title session this works fine in jQuery:

$.get('get_title.php',function(*respons*){
    title=*respons* + 'whatever you want'   
    $(document).attr('title',title)
})

Regular expression for floating point numbers

TL;DR

Use [.] instead of \. and [0-9] instead of \d to avoid escaping issues in some languages (like Java).

^{Thanks to the nameless one for originally recognizing this.}

One relatively simple pattern for matching a floating point number is

[+-]?([0-9]*[.])?[0-9]+

This will match:

123
123.456
.456

^{See a working example}

If you also want to match 123. (a period with no decimal part), then you'll need a slightly longer expression:

[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)

^{See pkeller's answer for a fuller explanation of this pattern}

If you want to include non-decimal numbers, such as hex and octal, see my answer to How do I identify if a string is a number?.

If you want to validate that an input is a number (rather than finding a number within the input), then you should surround the pattern with ^ and $, like so:

^[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)$

Irregular Regular Expressions

"Regular expressions", as implemented in most modern languages, APIs, frameworks, libraries, etc., are based on a concept developed in formal language theory. However, software engineers have added many extensions that take these implementations far beyond the formal definition. So, while most regular expression engines resemble one another, there is actually no standard. For this reason, a lot depends on what language, API, framework or library you are using.

(Incidentally, to help reduce confusion, many have taken to using "regex" or "regexp" to describe these enhanced matching languages. See Is a Regex the Same as a Regular Expression? at RexEgg.com for more information.)

That said, most regex engines (actually, all of them, as far as I know) would accept \.. Most likely, there's an issue with escaping.

The Trouble with Escaping

Some languages have built-in support for regexes, such as JavaScript. For those languages that don't, escaping can be a problem.

This is because you are basically coding in a language within a language. Java, for example, uses \ as an escape character within it's strings, so if you want to place a literal backslash character within a string, you must escape it:

// creates a single character string: "\"
String x = "\\";

However, regexes also use the \ character for escaping, so if you want to match a literal \ character, you must escape it for the regexe engine, and then escape it again for Java:

// Creates a two-character string: "\\"
// When used as a regex pattern, will match a single character: "\"
String regexPattern = "\\\\";

In your case, you have probably not escaped the backslash character in the language you are programming in:

// will most likely result in an "Illegal escape character" error
String wrongPattern = "\.";
// will result in the string "\."
String correctPattern = "\\.";

All this escaping can get very confusing. If the language you are working with supports raw strings, then you should use those to cut down on the number of backslashes, but not all languages do (most notably: Java). Fortunately, there's an alternative that will work some of the time:

String correctPattern = "[.]";

For a regex engine, \. and [.] mean exactly the same thing. Note that this doesn't work in every case, like newline (\\n), open square bracket (\\[) and backslash (\\\\ or [\\]).

A Note about Matching Numbers

(Hint: It's harder than you think)

Matching a number is one of those things you'd think is quite easy with regex, but it's actually pretty tricky. Let's take a look at your approach, piece by piece:

[-+]?

Match an optional - or +

[0-9]*

Match 0 or more sequential digits

\.?

Match an optional .

[0-9]*

Match 0 or more sequential digits

First, we can clean up this expression a bit by using a character class shorthand for the digits (note that this is also susceptible to the escaping issue mentioned above):

[0-9] = \d

I'm going to use \d below, but keep in mind that it means the same thing as [0-9]. (Well, actually, in some engines \d will match digits from all scripts, so it'll match more than [0-9] will, but that's probably not significant in your case.)

Now, if you look at this carefully, you'll realize that every single part of your pattern is optional. This pattern can match a 0-length string; a string composed only of + or -; or, a string composed only of a .. This is probably not what you've intended.

To fix this, it's helpful to start by "anchoring" your regex with the bare-minimum required string, probably a single digit:

\d+

Now we want to add the decimal part, but it doesn't go where you think it might:

\d+\.?\d* /* This isn't quite correct. */

This will still match values like 123.. Worse, it's got a tinge of evil about it. The period is optional, meaning that you've got two repeated classes side-by-side (\d+ and \d*). This can actually be dangerous if used in just the wrong way, opening your system up to DoS attacks.

To fix this, rather than treating the period as optional, we need to treat it as required (to separate the repeated character classes) and instead make the entire decimal portion optional:

\d+(\.\d+)? /* Better. But... */

This is looking better now. We require a period between the first sequence of digits and the second, but there's a fatal flaw: we can't match .123 because a leading digit is now required.

This is actually pretty easy to fix. Instead of making the "decimal" portion of the number optional, we need to look at it as a sequence of characters: 1 or more numbers that may be prefixed by a . that may be prefixed by 0 or more numbers:

(\d*\.)?\d+

Now we just add the sign:

[+-]?(\d*\.)?\d+

Of course, those slashes are pretty annoying in Java, so we can substitute in our long-form character classes:

[+-]?([0-9]*[.])?[0-9]+

Matching versus Validating

This has come up in the comments a couple times, so I'm adding an addendum on matching versus validating.

The goal of matching is to find some content within the input (the "needle in a haystack"). The goal of validating is to ensure that the input is in an expected format.

Regexes, by their nature, only match text. Given some input, they will either find some matching text or they will not. However, by "snapping" an expression to the beginning and ending of the input with anchor tags (^ and $), we can ensure that no match is found unless the entire input matches the expression, effectively using regexes to validate.

The regex described above ([+-]?([0-9]*[.])?[0-9]+) will match one or more numbers within a target string. So given the input:

apple 1.34 pear 7.98 version 1.2.3.4

The regex will match 1.34, 7.98, 1.2, .3 and .4.

To validate that a given input is a number and nothing but a number, "snap" the expression to the start and end of the input by wrapping it in anchor tags:

^[+-]?([0-9]*[.])?[0-9]+$

This will only find a match if the entire input is a floating point number, and will not find a match if the input contains additional characters. So, given the input 1.2, a match will be found, but given apple 1.2 pear no matches will be found.

Note that some regex engines have a validate, isMatch or similar function, which essentially does what I've described automatically, returning true if a match is found and false if no match is found. Also keep in mind that some engines allow you to set flags which change the definition of ^ and $, matching the beginning/end of a line rather than the beginning/end of the entire input. This is typically not the default, but be on the lookout for these flags.

Most efficient way to concatenate strings in JavaScript?

Three years past since this question was answered but I will provide my answer anyway :)

Actually, accepted answer is not fully correct. Jakub's test uses hardcoded string which allows JS engine to optimize code execution (Google's V8 is really good in this stuff!). But as soon as you use completely random strings (here is JSPerf) then string concatenation will be on a second place.

IE prompts to open or save json result from server

Have you tried to send your ajax request using POST method ? You could also try to set content type to 'text/x-json' while returning result from the server.

What does -> mean in Python function definitions?

def f(x) -> 123:
    return x

My summary:

Simply -> is introduced to get developers to optionally specify the return type of the function. See Python Enhancement Proposal 3107
This is an indication of how things may develop in future as Python is adopted extensively - an indication towards strong typing - this is my personal observation.
You can specify types for arguments as well. Specifying return type of the functions and arguments will help in reducing logical errors and improving code enhancements.
You can have expressions as return type (for both at function and parameter level) and the result of the expressions can be accessed via annotations object's 'return' attribute. annotations will be empty for the expression/return value for lambda inline functions.

Filter values only if not null using lambda in Java8

You just need to filter the cars that have a null name:

requiredCars = cars.stream()
                   .filter(c -> c.getName() != null)
                   .filter(c -> c.getName().startsWith("M"));

Zip lists in Python

Basically the zip function works on lists, tuples and dictionaries in Python. If you are using IPython then just type zip? And check what zip() is about.

If you are not using IPython then just install it: "pip install ipython"

For lists

a = ['a', 'b', 'c']
b = ['p', 'q', 'r']
zip(a, b)

The output is [('a', 'p'), ('b', 'q'), ('c', 'r')

For dictionary:

c = {'gaurav':'waghs', 'nilesh':'kashid', 'ramesh':'sawant', 'anu':'raje'}
d = {'amit':'wagh', 'swapnil':'dalavi', 'anish':'mane', 'raghu':'rokda'}
zip(c, d)

The output is:

[('gaurav', 'amit'),
 ('nilesh', 'swapnil'),
 ('ramesh', 'anish'),
 ('anu', 'raghu')]

How to set proxy for wget?

the following possible configs are located in /etc/wgetrc just uncomment and use...

# You can set the default proxies for Wget to use for http, https, and ftp.
# They will override the value in the environment.
#https_proxy = http://proxy.yoyodyne.com:18023/
#http_proxy = http://proxy.yoyodyne.com:18023/
#ftp_proxy = http://proxy.yoyodyne.com:18023/

# If you do not want to use proxy at all, set this to off.
#use_proxy = on

Cross-thread operation not valid: Control 'textBox1' accessed from a thread other than the thread it was created on

Use a shared container to transfer data between threads.

Ruby replace string with captured regex pattern

\1 in double quotes needs to be escaped. So you want either

"Z_sdsd: sdsd".gsub(/^(Z_.*): .*/, "\\1")

"Z_sdsd: sdsd".gsub(/^(Z_.*): .*/, '\1')

see the docs on gsub where it says "If it is a double-quoted string, both back-references must be preceded by an additional backslash."

That being said, if you just want the result of the match you can do:

"Z_sdsd: sdsd".scan(/^Z_.*(?=:)/)

"Z_sdsd: sdsd"[/^Z_.*(?=:)/]

Note that the (?=:) is a non-capturing group so that the : doesn't show up in your match.

Exception.Message vs Exception.ToString()

Exception.Message contains only the message (doh) associated with the exception. Example:

Object reference not set to an instance of an object

The Exception.ToString() method will give a much more verbose output, containing the exception type, the message (from before), a stack trace, and all of these things again for nested/inner exceptions. More precisely, the method returns the following:

ToString returns a representation of the current exception that is intended to be understood by humans. Where the exception contains culture-sensitive data, the string representation returned by ToString is required to take into account the current system culture. Although there are no exact requirements for the format of the returned string, it should attempt to reflect the value of the object as perceived by the user.

The default implementation of ToString obtains the name of the class that threw the current exception, the message, the result of calling ToString on the inner exception, and the result of calling Environment.StackTrace. If any of these members is a null reference (Nothing in Visual Basic), its value is not included in the returned string.

If there is no error message or if it is an empty string (""), then no error message is returned. The name of the inner exception and the stack trace are returned only if they are not a null reference (Nothing in Visual Basic).

Join two sql queries

I would just use a Union

In your second query add the extra column name and add a '' in all the corresponding locations in the other queries

Example

//reverse order to get the column names
select top 10 personId, '' from Telephone//No Column name assigned 
Union 
select top 10 personId, loanId from loan

Sprintf equivalent in Java

Since Java 13 you have formatted 1 method on String, which was added along with text blocks as a preview feature 2. You can use it instead of String.format()

Assertions.assertEquals(
   "%s %d %.3f".formatted("foo", 123, 7.89),
   "foo 123 7.890"
);

Fragments onResume from back stack

I've changed the suggested solution a little bit. Works better for me like that:

private OnBackStackChangedListener getListener() {
    OnBackStackChangedListener result = new OnBackStackChangedListener() {
        public void onBackStackChanged() {
            FragmentManager manager = getSupportFragmentManager();
            if (manager != null) {
                int backStackEntryCount = manager.getBackStackEntryCount();
                if (backStackEntryCount == 0) {
                    finish();
                }
                Fragment fragment = manager.getFragments()
                                           .get(backStackEntryCount - 1);
                fragment.onResume();
            }
        }
    };
    return result;
}

How to create directory automatically on SD card

Had the same problem and just want to add that AndroidManifest.xml also needs this permission:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Using CSS to insert text

It is, but requires a CSS2 capable browser (all major browsers, IE8+).

.OwnerJoe:before {
  content: "Joe's Task:";
}

But I would rather recommend using Javascript for this. With jQuery:

$('.OwnerJoe').each(function() {
  $(this).before($('<span>').text("Joe's Task: "));
});

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

I found using while IFS='=' read -r to be a bit slow (I don't know why, maybe someone could briefly explain in a comment or point to a SO answer?). I also found @Nicolai answer very neat as a one-liner, but very inefficient as it will scan the entire properties file over and over again for every single call of prop.

I found a solution that answers the question, performs well and it is a one-liner (bit verbose line though).

The solution does sourcing but massages the contents before sourcing:

#!/usr/bin/env bash

source <(grep -v '^ *#' ./app.properties | grep '[^ ] *=' | awk '{split($0,a,"="); print gensub(/\./, "_", "g", a[1]) "=" a[2]}')

echo $db_uat_user

Explanation:

grep -v '^ *#': discard comment lines grep '[^ ] *=': discards lines without = split($0,a,"="): splits line at = and stores into array a, i.e. a[1] is the key, a[2] is the value gensub(/\./, "_", "g", a[1]): replaces . with _ print gensub... "=" a[2]} concatenates the result of gensub above with = and value.

Edit: As others pointed out, there are some incompatibilities issues (awk) and also it does not validate the contents to see if every line of the property file is actually a kv pair. But the goal here is to show the general idea for a solution that is both fast and clean. Sourcing seems to be the way to go as it loads the properties once that can be used multiple times.

git: Your branch is ahead by X commits

Then when I do a git status it tells me that my branch is ahead by X commits (presumably the same number of commits that I have made).

My experience is in a team environment with many branches. We work in our own feature branches (in local clones) and it was one of those that git status showed I was 11 commits ahead. My working assumption, like the question's author, was that +11 was from commits of my own.

It turned out that I had pulled in changes from the common develop branch into my feature branch many weeks earlier -- but forgot! When I revisited my local feature branch today and did a git pull origin develop the number jumped to +41 commits ahead. Much work had been done in develop and so my local feature branch was even further ahead of the feature branch on the origin repository.

So, if you get this message, think back to any pulls/merges you might have done from other branches (of your own, or others) you have access to. The message just signals you need to git push those pulled changes back to the origin repo ('tracking branch') from your local repo to get things sync'd up.

How to set connection timeout with OkHttp

Like so:

//New Request
HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
logging.setLevel(HttpLoggingInterceptor.Level.BASIC);
final OkHttpClient client = new OkHttpClient.Builder()
    .addInterceptor(logging)
    .connectTimeout(30, TimeUnit.SECONDS)
    .readTimeout(30, TimeUnit.SECONDS)
    .writeTimeout(30, TimeUnit.SECONDS)
    .build();

How to determine if a list of polygon points are in clockwise order?

This is the implemented function for OpenLayers 2. The condition for having a clockwise polygon is area < 0, it confirmed by this reference.

function IsClockwise(feature)
{
    if(feature.geometry == null)
        return -1;

    var vertices = feature.geometry.getVertices();
    var area = 0;

    for (var i = 0; i < (vertices.length); i++) {
        j = (i + 1) % vertices.length;

        area += vertices[i].x * vertices[j].y;
        area -= vertices[j].x * vertices[i].y;
        // console.log(area);
    }

    return (area < 0);
}

How to resolve the "ADB server didn't ACK" error?

For me it didn't work , it was related to a path problem happened after android studio 2.0 preview 1, I needed to update genymotion and virtual box, and apparently they tried to use same port for adb.

Solution is explained here link! Basically you just need to:

1) open genymotion settings

2) specify sdk path for the adb manually

3) adb kill-server

4) adb start-server

Generic List - moving an item within the list

I know you said "generic list" but you didn't specify that you needed to use the List(T) class so here is a shot at something different.

The ObservableCollection(T) class has a Move method that does exactly what you want.

public void Move(int oldIndex, int newIndex)

Underneath it is basically implemented like this.

T item = base[oldIndex];
base.RemoveItem(oldIndex);
base.InsertItem(newIndex, item);

So as you can see the swap method that others have suggested is essentially what the ObservableCollection does in it's own Move method.

UPDATE 2015-12-30: You can see the source code for the Move and MoveItem methods in corefx now for yourself without using Reflector/ILSpy since .NET is open source.

findViewByID returns null

    @Override
protected void onStart() {
         // use findViewById() here instead of in onCreate()
    }

How to change text and background color?

You can also use PDCurses library. (http://pdcurses.sourceforge.net/)

How to run test methods in specific order in JUnit4?

Here is an extension to JUnit that can produce the desired behavior: https://github.com/aafuks/aaf-junit

I know that this is against the authors of JUnit philosophy, but when using JUnit in environments that are not strict unit testing (as practiced in Java) this can be very helpful.

How to use global variable in node.js?

Most people advise against using global variables. If you want the same logger class in different modules you can do this

logger.js

  module.exports = new logger(customConfig);

foobar.js

  var logger = require('./logger');
  logger('barfoo');

If you do want a global variable you can do:

global.logger = new logger(customConfig);

Display a RecyclerView in Fragment

You should retrieve RecyclerView in a Fragment after inflating core View using that View. Perhaps it can't find your recycler because it's not part of Activity

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
    final View view = inflater.inflate(R.layout.fragment_artist_tracks, container, false);
    final FragmentActivity c = getActivity();
    final RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
    LinearLayoutManager layoutManager = new LinearLayoutManager(c);
    recyclerView.setLayoutManager(layoutManager);

    new Thread(new Runnable() {
        @Override
        public void run() {
            final RecyclerAdapter adapter = new RecyclerAdapter(c);
            c.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    recyclerView.setAdapter(adapter);
                }
            });
        }
    }).start();

    return view;
}

Eclipse C++: Symbol 'std' could not be resolved

For MinGW this worked for me:

Right click project, select Properties
Go to C/C++ General - Paths and Symbols - Includes - GNU C++ - Include directories
Select Add...
Select Variables...
Select MINGW_HOME and click OK
Click Apply and OK

You should now see several MinGW paths in Includes in your project explorer.
The errors may not disappear instantly, you may need to refresh/build your project.

If you are using Cygwin, there could be an equivalent variable present.

Ruby Hash to array of values

I would use:

hash.map { |key, value| value }

iTunes Connect: How to choose a good SKU?

SKU stands for Stock-keeping Unit. It's more for inventory tracking purpose.

The purpose of having an SKU is so that you can tie the app sales to whatever internal SKU number that your accounting is using.

Data was not saved: object references an unsaved transient instance - save the transient instance before flushing

Looks like Users that are added in your Country object, are not already present in the DB. You need to use cascade to make sure that when Country is persisted, all User which are not there in data but are associated with Country also get persisted.

Below code should help:

@ManyToOne (cascade = CascadeType.ALL)
   @JoinColumn (name = "countryId")
   private Country country;

How to combine GROUP BY and ROW_NUMBER?

The deduplication (to select the max T1) and the aggregation need to be done as distinct steps. I've used a CTE since I think this makes it clearer:

;WITH sumCTE
AS
(
    SELECT  Rel.t2ID, SUM(Price) price
    FROM    @t1         AS T1
    JOIN    @relation   AS Rel 
    ON      Rel.t1ID=T1.ID
    GROUP 
    BY      Rel.t2ID
)
,maxCTE
AS
(
    SELECT  Rel.t2ID, Rel.t1ID, 
            ROW_NUMBER()OVER(Partition By Rel.t2ID Order By Price DESC)As PriceList
    FROM    @t1         AS T1
    JOIN    @relation   AS Rel 
    ON      Rel.t1ID=T1.ID
)
SELECT T2.ID AS T2ID
,T2.Name as T2Name
,T2.Orders
,T1.ID AS T1ID
,T1.Name As T1Name
,sumT1.Price
FROM    @t2 AS T2
JOIN    sumCTE AS sumT1
ON      sumT1.t2ID = t2.ID
JOIN    maxCTE AS maxT1
ON      maxT1.t2ID = t2.ID
JOIN    @t1 AS T1
ON      T1.ID = maxT1.t1ID
WHERE   maxT1.PriceList = 1

How to create json by JavaScript for loop?

Your question is pretty hard to decode, but I'll try taking a stab at it.

You say:

I want to create a json object having two fields uniqueIDofSelect and optionValue in javascript.

And then you say:

I need output like

[{"selectID":2,"optionValue":"2"},
{"selectID":4,"optionvalue":"1"}]

Well, this example output doesn't have the field named uniqueIDofSelect, it only has optionValue.

Anyway, you are asking for array of objects...

Then in the comment to michaels answer you say:

It creates json object array. but I need only one json object.

So you don't want an array of objects?

What do you want then?

Please make up your mind.

Another Repeated column in mapping for entity error

@Id
@Column(name = "COLUMN_NAME", nullable = false)
public Long getId() {
    return id;
}

@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, targetEntity = SomeCustomEntity.class)
@JoinColumn(name = "COLUMN_NAME", referencedColumnName = "COLUMN_NAME", nullable = false, updatable = false, insertable = false)
@org.hibernate.annotations.Cascade(value = org.hibernate.annotations.CascadeType.ALL)
public List<SomeCustomEntity> getAbschreibareAustattungen() {
    return abschreibareAustattungen;
}

If you have already mapped a column and have accidentaly set the same values for name and referencedColumnName in @JoinColumn hibernate gives the same stupid error

Error:

Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: com.testtest.SomeCustomEntity column: COLUMN_NAME (should be mapped with insert="false" update="false")

In Perl, what is the difference between a .pm (Perl module) and .pl (Perl script) file?

A .pl is a single script.

In .pm (Perl Module) you have functions that you can use from other Perl scripts:

A Perl module is a self-contained piece of Perl code that can be used by a Perl program or by other Perl modules. It is conceptually similar to a C link library, or a C++ class.

Count(*) vs Count(1) - SQL Server

In all RDBMS, the two ways of counting are equivalent in terms of what result they produce. Regarding performance, I have not observed any performance difference in SQL Server, but it may be worth pointing out that some RDBMS, e.g. PostgreSQL 11, have less optimal implementations for COUNT(1) as they check for the argument expression's nullability as can be seen in this post.

I've found a 10% performance difference for 1M rows when running:

-- Faster
SELECT COUNT(*) FROM t;

-- 10% slower
SELECT COUNT(1) FROM t;

How to flip background image using CSS?

According to w3schools: http://www.w3schools.com/cssref/css3_pr_transform.asp

The transform property is supported in Internet Explorer 10, Firefox, and Opera. Internet Explorer 9 supports an alternative, the -ms-transform property (2D transforms only). Safari and Chrome support an alternative, the -webkit-transform property (3D and 2D transforms). Opera supports 2D transforms only.

This is a 2D transform, so it should work, with the vendor prefixes, on Chrome, Firefox, Opera, Safari, and IE9+.

Other answers used :before to stop it from flipping the inner content. I used this on my footer (to vertically-mirror the image from my header):

HTML:

<footer>
<p><a href="page">Footer Link</a></p>
<p>&copy; 2014 Company</p>
</footer>

CSS:

footer {
background:url(/img/headerbg.png) repeat-x 0 0;

/* flip background vertically */
-webkit-transform:scaleY(-1);
-moz-transform:scaleY(-1);
-ms-transform:scaleY(-1);
-o-transform:scaleY(-1);
transform:scaleY(-1);
}

/* undo the vertical flip for all child elements */
footer * {
-webkit-transform:scaleY(-1);
-moz-transform:scaleY(-1);
-ms-transform:scaleY(-1);
-o-transform:scaleY(-1);
transform:scaleY(-1);
}

So you end up flipping the element and then re-flipping all its children. Works with nested elements, too.

Sending files using POST with HttpURLConnection

To upload file on server with some parameter using MultipartUtility in simple way.

MultipartUtility.java

public class MultipartUtility {

    private final String boundary;
    private static final String LINE_FEED = "\r\n";
    private HttpURLConnection httpConn;
    private String charset;
    private OutputStream outputStream;
    private PrintWriter writer;

    /**
     * This constructor initializes a new HTTP POST request with content type
     * is set to multipart/form-data
     *
     * @param requestURL
     * @param charset
     * @throws IOException
     */
    public MultipartUtility(String requestURL, String charset)
            throws IOException {
        this.charset = charset;

        // creates a unique boundary based on time stamp
        boundary = "===" + System.currentTimeMillis() + "===";

        URL url = new URL(requestURL);
        Log.e("URL", "URL : " + requestURL.toString());
        httpConn = (HttpURLConnection) url.openConnection();
        httpConn.setUseCaches(false);
        httpConn.setDoOutput(true); // indicates POST method
        httpConn.setDoInput(true);
        httpConn.setRequestProperty("Content-Type",
                "multipart/form-data; boundary=" + boundary);
        httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
        httpConn.setRequestProperty("Test", "Bonjour");
        outputStream = httpConn.getOutputStream();
        writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
                true);
    }

    /**
     * Adds a form field to the request
     *
     * @param name  field name
     * @param value field value
     */
    public void addFormField(String name, String value) {
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
                .append(LINE_FEED);
        writer.append("Content-Type: text/plain; charset=" + charset).append(
                LINE_FEED);
        writer.append(LINE_FEED);
        writer.append(value).append(LINE_FEED);
        writer.flush();
    }

    /**
     * Adds a upload file section to the request
     *
     * @param fieldName  name attribute in <input type="file" name="..." />
     * @param uploadFile a File to be uploaded
     * @throws IOException
     */
    public void addFilePart(String fieldName, File uploadFile)
            throws IOException {
        String fileName = uploadFile.getName();
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append(
                "Content-Disposition: form-data; name=\"" + fieldName
                        + "\"; filename=\"" + fileName + "\"")
                .append(LINE_FEED);
        writer.append(
                "Content-Type: "
                        + URLConnection.guessContentTypeFromName(fileName))
                .append(LINE_FEED);
        writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
        writer.append(LINE_FEED);
        writer.flush();

        FileInputStream inputStream = new FileInputStream(uploadFile);
        byte[] buffer = new byte[4096];
        int bytesRead = -1;
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
        outputStream.flush();
        inputStream.close();

        writer.append(LINE_FEED);
        writer.flush();
    }

    /**
     * Adds a header field to the request.
     *
     * @param name  - name of the header field
     * @param value - value of the header field
     */
    public void addHeaderField(String name, String value) {
        writer.append(name + ": " + value).append(LINE_FEED);
        writer.flush();
    }

    /**
     * Completes the request and receives response from the server.
     *
     * @return a list of Strings as response in case the server returned
     * status OK, otherwise an exception is thrown.
     * @throws IOException
     */
    public String finish() throws IOException {
        StringBuffer response = new StringBuffer();

        writer.append(LINE_FEED).flush();
        writer.append("--" + boundary + "--").append(LINE_FEED);
        writer.close();

        // checks server's status code first
        int status = httpConn.getResponseCode();
        if (status == HttpURLConnection.HTTP_OK) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    httpConn.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();
            httpConn.disconnect();
        } else {
            throw new IOException("Server returned non-OK status: " + status);
        }

        return response.toString();
    }
}

To upload you file along with parameters.

NOTE : put this code below in non-ui-thread to get response.

String charset = "UTF-8";
String requestURL = "YOUR_URL";

MultipartUtility multipart = new MultipartUtility(requestURL, charset);
multipart.addFormField("param_name_1", "param_value");
multipart.addFormField("param_name_2", "param_value");
multipart.addFormField("param_name_3", "param_value");
multipart.addFilePart("file_param_1", new File(file_path));
String response = multipart.finish(); // response from server.

Change color when hover a font awesome icon?

use - !important - to override default black

_x000D_

.fa-heart:hover{_x000D_
   color:red !important;_x000D_
}_x000D_
.fa-heart-o:hover{_x000D_
   color:red !important;_x000D_
}

_x000D_

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">_x000D_
_x000D_
<i class="fa fa-heart fa-2x"></i>_x000D_
<i class="fa fa-heart-o fa-2x"></i>

_x000D_

How to print something when running Puppet client?

from the Puppet function documentation

info: Log a message on the server at level info.
debug: Log a message on the server at level debug.

You have to look a your puppetmaster logfile to find your info/debug messages.

You may use

notify{"The value is: ${yourvar}": }

to produce some output to your puppet client

Removing a non empty directory programmatically in C or C++

You can use opendir and readdir to read directory entries and unlink to delete them.

Delete files in subfolder using batch script

Use powershell inside your bat file

PowerShell Remove-Item c:\scripts\* -include *.txt -exclude *test* -force -recurse

You can also exclude from removing some specific folder or file:

PowerShell Remove-Item C:/*  -Exclude WINDOWS,autoexec.bat -force -recurse

CSS change button style after click

Each link has five different states: link, hover, active, focus and visited.

Link is the normal appearance, hover is when you mouse over, active is the state when it's clicked, focus follows active and visited is the state you end up when you unfocus the recently clicked link.

I'm guessing you want to achieve a different style on either focus or visited, then you can add the following CSS:

a { color: #00c; }
a:visited { #ccc; }
a:focus { #cc0; }

A recommended order in your CSS to not cause any trouble is the following:

a
a:visited { ... }
a:focus { ... }
a:hover { ... }
a:active { ... }

You can use your web browser's developer tools to force the states of the element like this (Chrome->Developer Tools/Inspect Element->Style->Filter :hov): Force state in Chrome Developer Tools

OS X: equivalent of Linux's wget

Instead of going with equivalent, you can try "brew install wget" and use wget.

You need to have brew installed in your mac.

Multidimensional Array [][] vs [,]

double[][] is an array of arrays and double[,] is a matrix. If you want to initialize an array of array, you will need to do this:

double[][] ServicePoint = new double[10][]
for(var i=0;i<ServicePoint.Length;i++)
    ServicePoint[i] = new double[9];

Take in account that using arrays of arrays will let you have arrays of different lengths:

ServicePoint[0] = new double[10];
ServicePoint[1] = new double[3];
ServicePoint[2] = new double[5];
//and so on...

Java: How to Indent XML Generated by Transformer

The following code is working for me with Java 7. I set the indent (yes) and indent-amount (2) on the transformer (not the transformer factory) to get it working.

TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
t.setOutputProperty(OutputKeys.INDENT, "yes");
t.transform(source, result);

@mabac's solution to set the attribute didn't work for me, but @lapo's comment proved helpful.

How to add option to select list in jQuery

$.each(data,function(index,itemData){
    $('#dropListBuilding').append($("<option></option>")
        .attr("value",key)
        .text(value)); 
});

Change WPF controls from a non-main thread using Dispatcher.Invoke

japf has answer it correctly. Just in case if you are looking at multi-line actions, you can write as below.

Application.Current.Dispatcher.BeginInvoke(
  DispatcherPriority.Background,
  new Action(() => { 
    this.progressBar.Value = 50;
  }));

Information for other users who want to know about performance:

If your code NEED to be written for high performance, you can first check if the invoke is required by using CheckAccess flag.

if(Application.Current.Dispatcher.CheckAccess())
{
    this.progressBar.Value = 50;
}
else
{
    Application.Current.Dispatcher.BeginInvoke(
      DispatcherPriority.Background,
      new Action(() => { 
        this.progressBar.Value = 50;
      }));
}

Note that method CheckAccess() is hidden from Visual Studio 2015 so just write it without expecting intellisense to show it up. Note that CheckAccess has overhead on performance (overhead in few nanoseconds). It's only better when you want to save that microsecond required to perform the 'invoke' at any cost. Also, there is always option to create two methods (on with invoke, and other without) when calling method is sure if it's in UI Thread or not. It's only rarest of rare case when you should be looking at this aspect of dispatcher.

Creating a segue programmatically

Storyboard Segues are not to be created outside of the storyboard. You will need to wire it up, despite the drawbacks.

UIStoryboardSegue Reference clearly states:

You do not create segue objects directly. Instead, the storyboard runtime creates them when it must perform a segue between two view controllers. You can still initiate a segue programmatically using the performSegueWithIdentifier:sender: method of UIViewController if you want. You might do so to initiate a segue from a source that was added programmatically and therefore not available in Interface Builder.

You can still programmatically tell the storyboard to present a view controller using a segue using presentModalViewController: or pushViewController:animated: calls, but you'll need a storyboard instance.

You can call UIStoryboards class method to get a named storyboard with bundle nil for the main bundle.

storyboardWithName:bundle:

Add (insert) a column between two columns in a data.frame

Here is a an example of how to move a column from last to first position. It combines [ with ncol. I thought it would be useful to have a very short answer here for the busy reader:

d = mtcars
d[, c(ncol(d), 1:(ncol(d)-1))]

Use of *args and **kwargs

Here's one of my favorite places to use the ** syntax as in Dave Webb's final example:

mynum = 1000
mystr = 'Hello World!'
print("{mystr} New-style formatting is {mynum}x more fun!".format(**locals()))

I'm not sure if it's terribly fast when compared to just using the names themselves, but it's a lot easier to type!

Self-reference for cell, column and row in worksheet functions

I was looking for a solution to this and used the indirect one found on this page initially, but I found it quite long and clunky for what I was trying to do. After a bit of research, I found a more elegant solution (to my problem) using R1C1 notation - I think you can't mix different notation styles without using VBA though.

Depending on what you're trying to do with the self referenced cell, something like this example should get a cell to reference itself where the cell is F13:

Range("F13").FormulaR1C1 = "RC"

And you can then reference cells in relative positions to that cell such as - where your cell is F13 and you need to reference G12 from it.

Range("F13").FormulaR1C1 = "R[-1]C[1]"

You're essentially telling Excel to find F13 and then move down 1 row and up one column from that.

How this fit into my project was to apply a vlookup across a range where the lookup value was relative to each cell in the range without having to specify each lookup cell separately:

Sub Code()
    Dim Range1 As Range
    Set Range1 = Range("B18:B23")
        Range1.Locked = False
        Range1.FormulaR1C1 = "=IFERROR(VLOOKUP(RC[-1],DATABYCODE,2,FALSE),"""")"
        Range1.Locked = True
End Sub

My lookup value is the cell to the left of each cell (column -1) in my DIM'd range and DATABYCODE is the named range I'm looking up against.

Hope that makes a little sense? Thought it was worth throwing into the mix as another way to approach the problem.

Git fast forward VS no fast forward merge

When we work on development environment and merge our code to staging/production branch then Git no fast forward can be a better option. Usually when we work in development branch for a single feature we tend to have multiple commits. Tracking changes with multiple commits can be inconvenient later on. If we merge with staging/production branch using Git no fast forward then it will have only 1 commit. Now anytime we want to revert the feature, just revert that commit. Life is easy.

Converting java.util.Properties to HashMap<String,String>

The problem is that Properties implements Map<Object, Object>, whereas the HashMap constructor expects a Map<? extends String, ? extends String>.

This answer explains this (quite counter-intuitive) decision. In short: before Java 5, Properties implemented Map (as there were no generics back then). This meant that you could put any Object in a Properties object. This is still in the documenation:

Because Properties inherits from Hashtable, the put and putAll methods can be applied to a Properties object. Their use is strongly discouraged as they allow the caller to insert entries whose keys or values are not Strings. The setProperty method should be used instead.

To maintain compatibility with this, the designers had no other choice but to make it inherit Map<Object, Object> in Java 5. It's an unfortunate result of the strive for full backwards compatibility which makes new code unnecessarily convoluted.

If you only ever use string properties in your Properties object, you should be able to get away with an unchecked cast in your constructor:

Map<String, String> map = new HashMap<String, String>( (Map<String, String>) properties);

or without any copies:

Map<String, String> map = (Map<String, String>) properties;

Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails

For me, this problem was a little different and super easy to check and solve.

You must ensure BOTH of your tables are InnoDB. If one of the tables, namely the reference table is a MyISAM, the constraint will fail.

    SHOW TABLE STATUS WHERE Name =  't1';

    ALTER TABLE t1 ENGINE=InnoDB;

Could not resolve com.android.support:appcompat-v7:26.1.0 in Android Studio new project

goto Android->sdk->build-tools directory make sure you have all the versions required . if not , download them . after that goto File-->Settigs-->Build,Execution,Depoyment-->Gradle

choose use default gradle wapper (recommended)

and untick Offline work

gradle build finishes successfully for once you can change the settings

If it dosent simply solve the problem

check this link to find an appropriate support library revision

https://developer.android.com/topic/libraries/support-library/revisions

Make sure that the compile sdk and target version same as the support library version. It is recommended maintain network connection atleast for the first time build (Remember to rebuild your project after doing this)

How to show Page Loading div until the page has finished loading?

Default the contents to display:none and then have an event handler that sets it to display:block or similar after it's fully loaded. Then have a div that's set to display:block with "Loading" in it, and set it to display:none in the same event handler as before.

Difference between save and saveAndFlush in Spring data jpa

Depending on the hibernate flush mode that you are using (AUTO is the default) save may or may not write your changes to the DB straight away. When you call saveAndFlush you are enforcing the synchronization of your model state with the DB.

If you use flush mode AUTO and you are using your application to first save and then select the data again, you will not see a difference in bahvior between save() and saveAndFlush() because the select triggers a flush first. See the documention.

Simple way to repeat a string

Despite your desire not to use loops, I think you should use a loop.

String repeatString(String s, int repetitions)
{
    if(repetitions < 0) throw SomeException();

    else if(s == null) return null;

    StringBuilder stringBuilder = new StringBuilder(s.length() * repetitions);

    for(int i = 0; i < repetitions; i++)
        stringBuilder.append(s);

    return stringBuilder.toString();
}

Your reasons for not using a for loop are not good ones. In response to your criticisms:

Whatever solution you use will almost certainly be longer than this. Using a pre-built function only tucks it under more covers.
Someone reading your code will have to figure out what you're doing in that non-for-loop. Given that a for-loop is the idiomatic way to do this, it would be much easier to figure out if you did it with a for loop.
Yes someone might add something clever, but by avoiding a for loop you are doing something clever. That's like shooting yourself in the foot intentionally to avoid shooting yourself in the foot by accident.
Off-by-one errors are also mind-numbingly easy to catch with a single test. Given that you should be testing your code, an off-by-one error should be easy to fix and catch. And it's worth noting: the code above does not contain an off-by-one error. For loops are equally easy to get right.
So don't reuse variables. That's not the for-loop's fault.
Again, so does whatever solution you use. And as I noted before; a bug hunter will probably be expecting you to do this with a for loop, so they'll have an easier time finding it if you use a for loop.

How can I get useful error messages in PHP?

This answer is brought to you by the department of redundancy department.

ini_set() / php.ini / .htaccess / .user.ini

The settings display_errors and error_reporting have been covered sufficiently now. But just to recap when to use which option:
- ini_set() and error_reporting() apply for runtime errors only.
- php.ini should primarily be edited for development setups. (Webserver and CLI version often have different php.ini's)
- .htaccess flags only work for dated setups (Find a new hoster! Well managed servers are cheaper.)
- .user.ini are partial php.ini's for modern setups (FCGI/FPM)
And as crude alternative for runtime errors you can often use:
```
set_error_handler("var_dump");   // ignores error_reporting and `@` suppression
```
error_get_last()

Can be used to retrieve the last runtime notice/warning/error, when error_display is disabled.
$php_errormsg

Is a superlocal variable, which also contains the last PHP runtime message.
isset() begone!

I know this will displease a lot of folks, but isset and empty should not be used by newcomers. You can add the notice suppression after you verified your code is working. But never before.

A lot of the "something doesn't work" questions we get lately are the result of typos like:
```
if(isset($_POST['sumbit']))
#                  ??
```
You won't get any useful notices if your code is littered with isset/empty/array_keys_exists. It's sometimes more sensible to use @, so notices and warnings go to the logs at least.
assert_options(ASSERT_ACTIVE|ASSERT_WARNING);

To get warnings for assert() sections. (Pretty uncommon, but more proficient code might contain some.)

PHP7 requires zend.assertions=1 in the php.ini as well.
declare(strict_types=1);

Bending PHP into a strictly typed language is not going to fix a whole lot of logic errors, but it's definitely an option for debugging purposes.
PDO / MySQLi

And @Phil already mentioned PDO/MySQLi error reporting options. Similar options exist for other database APIs of course.
json_last_error() + json_last_error_msg

For JSON parsing.
preg_last_error()

For regexen.
CURLOPT_VERBOSE

To debug curl requests, you need CURLOPT_VERBOSE at the very least.
shell/exec()

Likewise will shell command execution not yield errors on its own. You always need 2>&1 and peek at the $errno.

Where should I put the log4j.properties file?

I found that Glassfish by default is looking at [Glassfish install location]\glassfish\domains[your domain]\ as the default working directory... you can drop the log4j.properties file in this location and initialize it in your code using PropertyConfigurator as previously mentioned...

Properties props = System.getProperties();
System.out.println("Current working directory is " + props.getProperty("user.dir"));
PropertyConfigurator.configure("log4j.properties");

Access key value from Web.config in Razor View-MVC3 ASP.NET

The preferred method is actually:

@System.Web.Configuration.WebConfigurationManager.AppSettings["myKey"]

It also doesn't need a reference to the ConfigurationManager assembly, it's already in System.Web.

How to implement swipe gestures for mobile devices?

Have you tried Hammerjs? It supports swipe gestures by using the velocity of the touch. http://eightmedia.github.com/hammer.js/

View array in Visual Studio debugger?

I use the ArrayDebugView add-in for Visual Studio (http://arraydebugview.sourceforge.net/).

It seems to be a long dead project (but one I'm looking at continuing myself) but the add-in still works beautifully for me in VS2010 for both C++ and C#.

It has a few quirks (tab order, modal dialog, no close button) but the ability to plot the contents of an array in a graph more than make up for it.

Edit July 2014: I have finally built a new Visual Studio extension to replace ArrayebugView's functionality. It is available on the VIsual Studio Gallery, search for ArrayPlotter or go to http://visualstudiogallery.msdn.microsoft.com/2fde2c3c-5b83-4d2a-a71e-5fdd83ce6b96?SRC=Home

Background color of text in SVG

You can combine filter with the text.

_x000D_

<!DOCTYPE html>_x000D_
<html>_x000D_
  <head>_x000D_
    <meta charset=utf-8 />_x000D_
    <title>SVG colored patterns via mask</title>_x000D_
  </head>_x000D_
  <body>_x000D_
    <svg viewBox="0 0 300 300" xmlns="http://www.w3.org/2000/svg">_x000D_
      <defs>_x000D_
        <filter x="0" y="0" width="1" height="1" id="bg-text">_x000D_
          <feFlood flood-color="white"/>_x000D_
          <feComposite in="SourceGraphic" operator="xor" />_x000D_
        </filter>_x000D_
      </defs>_x000D_
   <!-- something has already existed -->_x000D_
    <rect fill="red" x="150" y="20" width="100" height="50" />_x000D_
    <circle cx="50"  cy="50" r="50" fill="blue"/>_x000D_
      _x000D_
      <!-- Text render here -->_x000D_
      <text filter="url(#bg-text)" fill="black" x="20" y="50" font-size="30">text with color</text>_x000D_
      <text fill="black" x="20" y="50" font-size="30">text with color</text>_x000D_
    </svg>_x000D_
  </body>_x000D_
</html>

_x000D_

Why doesn't catching Exception catch RuntimeException?

I faced similar scenario. It was happening because classA's initilization was dependent on classB's initialization. When classB's static block faced runtime exception, classB was not initialized. Because of this, classB did not throw any exception and classA's initialization failed too.

class A{//this class will never be initialized because class B won't intialize
  static{
    try{
      classB.someStaticMethod();
    }catch(Exception e){
      sysout("This comment will never be printed");
    }
 }
}

class B{//this class will never be initialized
 static{
    int i = 1/0;//throw run time exception 
 }

 public static void someStaticMethod(){}
}

And yes...catching Exception will catch run time exceptions as well.

Sample random rows in dataframe

Select a Random sample from a tibble type in R:

library("tibble")    
a <- your_tibble[sample(1:nrow(your_tibble), 150),]

nrow takes a tibble and returns the number of rows. The first parameter passed to sample is a range from 1 to the end of your tibble. The second parameter passed to sample, 150, is how many random samplings you want. The square bracket slicing specifies the rows of the indices returned. Variable 'a' gets the value of the random sampling.

How to properly use the "choices" field option in Django

For Django3.0+, use models.TextChoices (see docs-v3.0 for enumeration types)

from django.db import models

class MyModel(models.Model):
    class Month(models.TextChoices):
        JAN = '1', "JANUARY"
        FEB = '2', "FEBRUARY"
        MAR = '3', "MAR"
        # (...)

    month = models.CharField(
        max_length=2,
        choices=Month.choices,
        default=Month.JAN
    )

Usage::

>>> obj = MyModel.objects.create(month='1')
>>> assert obj.month == obj.Month.JAN
>>> assert MyModel.Month(obj.month).label == 'JANUARY'
>>> assert MyModel.objects.filter(month=MyModel.Month.JAN).count() >= 1

>>> obj2 = MyModel(month=MyModel.Month.FEB)
>>> assert obj2.get_month_display() == obj2.Month(obj2.month).label

What is the most efficient way to loop through dataframes with pandas?

Just as a small addition, you can also do an apply if you have a complex function that you apply to a single column:

http://pandas.pydata.org/pandas-docs/dev/generated/pandas.DataFrame.apply.html

df[b] = df[a].apply(lambda col: do stuff with col here)

Is nested function a good approach when required by only one function?

A function inside of a function is commonly used for closures.

(There is a lot of contention over what exactly makes a closure a closure.)

Here's an example using the built-in sum(). It defines start once and uses it from then on:

def sum_partial(start):
    def sum_start(iterable):
        return sum(iterable, start)
    return sum_start

In use:

>>> sum_with_1 = sum_partial(1)
>>> sum_with_3 = sum_partial(3)
>>> 
>>> sum_with_1
<function sum_start at 0x7f3726e70b90>
>>> sum_with_3
<function sum_start at 0x7f3726e70c08>
>>> sum_with_1((1,2,3))
7
>>> sum_with_3((1,2,3))
9

Built-in python closure

functools.partial is an example of a closure.

From the python docs, it's roughly equivalent to:

def partial(func, *args, **keywords):
    def newfunc(*fargs, **fkeywords):
        newkeywords = keywords.copy()
        newkeywords.update(fkeywords)
        return func(*(args + fargs), **newkeywords)
    newfunc.func = func
    newfunc.args = args
    newfunc.keywords = keywords
    return newfunc

(Kudos to @user225312 below for the answer. I find this example easier to figure out, and hopefully will help answer @mango's comment.)

Can I have two JavaScript onclick events in one element?

This one works:

<input type="button" value="test" onclick="alert('hey'); alert('ho');" />

And this one too:

function Hey()
{
    alert('hey');
}

function Ho()
{
    alert('ho');
}

<input type="button" value="test" onclick="Hey(); Ho();" />

So the answer is - yes you can :) However, I'd recommend to use unobtrusive JavaScript.. mixing js with HTML is just nasty.

How to secure database passwords in PHP?

If you're talking about the database password, as opposed to the password coming from a browser, the standard practice seems to be to put the database password in a PHP config file on the server.

You just need to be sure that the php file containing the password has appropriate permissions on it. I.e. it should be readable only by the web server and by your user account.

How to call a method with a separate thread in Java?

Create a class that implements the Runnable interface. Put the code you want to run in the run() method - that's the method that you must write to comply to the Runnable interface. In your "main" thread, create a new Thread class, passing the constructor an instance of your Runnable, then call start() on it. start tells the JVM to do the magic to create a new thread, and then call your run method in that new thread.

public class MyRunnable implements Runnable {

    private int var;

    public MyRunnable(int var) {
        this.var = var;
    }

    public void run() {
        // code in the other thread, can reference "var" variable
    }
}

public class MainThreadClass {
    public static void main(String args[]) {
        MyRunnable myRunnable = new MyRunnable(10);
        Thread t = new Thread(myRunnable)
        t.start();
    }    
}

Take a look at Java's concurrency tutorial to get started.

If your method is going to be called frequently, then it may not be worth creating a new thread each time, as this is an expensive operation. It would probably be best to use a thread pool of some sort. Have a look at Future, Callable, Executor classes in the java.util.concurrent package.

Write string to output stream

You may use Apache Commons IO:

try (OutputStream outputStream = ...) {
    IOUtils.write("data", outputStream, "UTF-8");
}

IOUtils.write(String data, OutputStream output, String encoding)

apache redirect from non www to www

If using the above solution of two <VirtualHost *:80> blocks with different ServerNames...

<VirtualHost *:80>
    ServerName example.com
    Redirect permanent / http://www.example.com/
</VirtualHost>
<VirtualHost *:80>
    ServerName www.example.com
</VirtualHost>

... then you must set NameVirtualHost On as well.

If you don't do this, Apache doesn't allow itself to use the different ServerNames to distinguish the blocks, so you get this error message:

[warn] _default_ VirtualHost overlap on port 80, the first has precedence

...and either no redirection happens, or you have an infinite redirection loop, depending on which block you put first.

Values of disabled inputs will not be submitted

Yes, all browsers should not submit the disabled inputs, as they are read-only.

More information (section 17.12.1)

Attribute definitions

disabled [CI] When set for a form control, this Boolean attribute disables the control for user input. When set, the disabled attribute has the following effects on an element:

Disabled controls do not receive focus.

Disabled controls are skipped in tabbing navigation.

Disabled controls cannot be successful.

The following elements support the disabled attribute: BUTTON, INPUT, OPTGROUP, OPTION, SELECT, and TEXTAREA.

This attribute is inherited but local declarations override the inherited value.

How disabled elements are rendered depends on the user agent. For example, some user agents "gray out" disabled menu items, button labels, etc.

In this example, the INPUT element is disabled. Therefore, it cannot receive user input nor will its value be submitted with the form.
<INPUT disabled name="fred" value="stone">
Note. The only way to modify dynamically the value of the disabled attribute is through a script.

Maven:Non-resolvable parent POM and 'parent.relativePath' points at wrong local POM

There was conflict in java version. Resolved after using 1.8 for maven.

undefined offset PHP error

Undefined offset means there's an empty array key for example:

$a = array('Felix','Jon','Java');

// This will result in an "Undefined offset" because the size of the array
// is three (3), thus, 0,1,2 without 3
echo $a[3];

You can solve the problem using a loop (while):

$i = 0;
while ($row = mysqli_fetch_assoc($result)) {
    // Increase count by 1, thus, $i=1
    $i++;

    $groupname[$i] = base64_decode(base64_decode($row['groupname']));

    // Set the first position of the array to null or empty
    $groupname[0] = "";
}

How would I extract a single file (or changes to a file) from a git stash?

The simplest concept to understand, although maybe not the best, is you have three files changed and you want to stash one file.

If you do git stash to stash them all, git stash apply to bring them back again and then git checkout f.c on the file in question to effectively reset it.

When you want to unstash that file run do a git reset --hard and then run git stash apply again, taking advantage ofthe fact that git stash apply doesn't clear the diff from the stash stack.

How do you fade in/out a background color using jquery?

javascript fade to white without jQuery or other library:

<div id="x" style="background-color:rgb(255,255,105)">hello world</div>
<script type="text/javascript">
var gEvent=setInterval("toWhite();", 100);
function toWhite(){
    var obj=document.getElementById("x");
    var unBlue=10+parseInt(obj.style.backgroundColor.split(",")[2].replace(/\D/g,""));
    if(unBlue>245) unBlue=255;
    if(unBlue<256) obj.style.backgroundColor="rgb(255,255,"+unBlue+")";
    else clearInterval(gEvent)
}
</script>

In printing, yellow is minus blue, so starting with the 3rd rgb element (blue) at less than 255 starts out with a yellow highlight. Then the 10+ in setting the var unBlue value increments the minus blue until it reaches 255.

Group a list of objects by an attribute

You could do this:

Map<String, List<Student>> map = new HashMap<String, List<Student>>();
List<Student> studlist = new ArrayList<Student>();
studlist.add(new Student("1726", "John", "New York"));
map.put("New York", studlist);

the keys will be locations and the values list of students. So later you can get a group of students just by using:

studlist = map.get("New York");

CSS list-style-image size

You can see how layout engines determine list-image sizes here: http://www.w3.org/wiki/CSS/Properties/list-style-image

There are three ways to do get around this while maintaining the benefits of CSS:

Resize the image.
Use a background-image and padding instead (easiest method).
Use an SVG without a defined size using viewBox that will then resize to 1em when used as a list-style-image (Kudos to Jeremy).

How can I detect when the mouse leaves the window?

Using the onMouseLeave event prevents bubbling and allows you to easily detect when the mouse leaves the browser window.

<html onmouseleave="alert('You left!')"></html>

http://www.w3schools.com/jsref/event_onmouseleave.asp

How to set a header in an HTTP response?

In my Controller, I merely added an HttpServletResponse parameter and manually added the headers, no filter or intercept required and it works fine:

httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
httpServletResponse.setHeader("Access-Control-Allow-Methods", "GET, OPTIONS");
httpServletResponse.setHeader("Access-Control-Allow-Headers","Origin, X-Requested-With, Content-Type, Accept, X-Auth-Token, X-Csrf-Token, WWW-Authenticate, Authorization");
httpServletResponse.setHeader("Access-Control-Allow-Credentials", "false");
httpServletResponse.setHeader("Access-Control-Max-Age", "3600");

A Simple, 2d cross-platform graphics library for c or c++?

http://www.allegro.cc/

http://en.wikipedia.org/wiki/Allegro_library

How to detect lowercase letters in Python?

You should use raw_input to take a string input. then use islower method of str object.

s = raw_input('Type a word')
l = []
for c in s.strip():
    if c.islower():
        print c
        l.append(c)
print 'Total number of lowercase letters: %d'%(len(l) + 1)

Just do -

dir(s)

and you will find islower and other attributes of str

Multiple submit buttons on HTML form – designate one button as default

The first button is always the default; it can't be changed. Whilst you can try to fix it up with JavaScript, the form will behave unexpectedly in a browser without scripting, and there are some usability/accessibility corner cases to think about. For example, the code linked to by Zoran will accidentally submit the form on Enter press in a <input type="button">, which wouldn't normally happen, and won't catch IE's behaviour of submitting the form for Enter press on other non-field content in the form. So if you click on some text in a <p> in the form with that script and press Enter, the wrong button will be submitted... especially dangerous if, as given in that example, the real default button is ‘Delete’!

My advice would be to forget about using scripting hacks to reassign defaultness. Go with the flow of the browser and just put the default button first. If you can't hack the layout to give you the on-screen order you want, then you can do it by having a dummy invisible button first in the source, with the same name/value as the button you want to be default:

<input type="submit" class="defaultsink" name="COMMAND" value="Save" />

.defaultsink {
    position: absolute; left: -100%;
}

(note: positioning is used to push the button off-screen because display: none and visibility: hidden have browser-variable side-effects on whether the button is taken as default and whether it's submitted.)

mongodb: insert if not exists

1. Use Update.

Drawing from Van Nguyen's answer above, use update instead of save. This gives you access to the upsert option.

NOTE: This method overrides the entire document when found (From the docs)

var conditions = { name: 'borne' }   , update = { $inc: { visits: 1 }} , options = { multi: true };

Model.update(conditions, update, options, callback);

function callback (err, numAffected) {   // numAffected is the number of updated documents })

1.a. Use $set

If you want to update a selection of the document, but not the whole thing, you can use the $set method with update. (again, From the docs)... So, if you want to set...

var query = { name: 'borne' };  Model.update(query, ***{ name: 'jason borne' }***, options, callback)

Send it as...

Model.update(query, ***{ $set: { name: 'jason borne' }}***, options, callback)

This helps prevent accidentally overwriting all of your document(s) with { name: 'jason borne' }.

Initializing data.frames()

I always just convert a matrix:

x <- as.data.frame(matrix(nrow = 100, ncol = 10))

height: 100% for <div> inside <div> with display: table-cell

This is exactly what you want:

HTML

<div class="table">

    <div class="cell">
        <p>Text</p>
        <p>Text</p>
        <p>Text</p>
        <p>Text</p>
        <p>Text</p>
        <p>Text</p>
        <p>Text</p>
        <p>Text</p>
    </div>
    <div class="cell">
        <div class="container">Text</div>
    </div>
</div>

CSS

.table {
    display: table;
    height:auto;
}

.cell {
    border: 2px solid black; 
    display:table-cell;
    vertical-align:top;
}

.container {
    height: 100%;
    overflow:auto;
    border: 2px solid green;
    -moz-box-sizing: border-box;
}

How do I search for files in Visual Studio Code?

I'm using VSCode 1.12.1

OSX press : Cmd + p

SQL Server default character encoding

I think this is worthy of a separate answer: although internally unicode data is stored as UTF-16 in Sql Server this is the Little Endian flavour, so if you're calling the database from an external system, you probably need to specify UTF-16LE.

What does the keyword "transient" mean in Java?

Google is your friend - first hit - also you might first have a look at what serialization is.

It marks a member variable not to be serialized when it is persisted to streams of bytes. When an object is transferred through the network, the object needs to be 'serialized'. Serialization converts the object state to serial bytes. Those bytes are sent over the network and the object is recreated from those bytes. Member variables marked by the java transient keyword are not transferred, they are lost intentionally.

Example from there, slightly modified (thanks @pgras):

public class Foo implements Serializable
 {
   private String saveMe;
   private transient String dontSaveMe;
   private transient String password;
   //...
 }

href overrides ng-click in Angular.js

In Angular, <a>s are directives. As such, if you have an empty href or no href, Angular will call event.preventDefault.

From the source:

    element.on('click', function(event){
      // if we have no href url, then don't navigate anywhere.
      if (!element.attr(href)) {
        event.preventDefault();
      }
    });

Here's a plnkr demonstrating the missing href scenario.

How can I know which radio button is selected via jQuery?

Also, check if the user does not select anything.

var radioanswer = 'none';
if ($('input[name=myRadio]:checked').val() != null) {           
   radioanswer = $('input[name=myRadio]:checked').val();
}

Basic authentication for REST API using spring restTemplate

(maybe) the easiest way without importing spring-boot.

restTemplate.getInterceptors().add(new BasicAuthorizationInterceptor("user", "password"));

Wildcard string comparison in Javascript

You should use RegExp (they are awesome) an easy solution is:

if( /^bird/.test(animals[i]) ){
    // a bird :D
}

Calling a stored procedure in Oracle with IN and OUT parameters

Go to Menu Tool -> SQL Output, Run the PL/SQL statement, the output will show on SQL Output panel.

Refresh Fragment at reload

   MyFragment fragment = (MyFragment) getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG);
        getSupportFragmentManager().beginTransaction().detach(fragment).attach(fragment).commit();

this will only work if u use FragmentManager to initialize the fragment. If u have it as a <fragment ... /> in XML, it won't call the onCreateView again. Wasted my 30 minutes to figure this out.

How can I bind to the change event of a textarea in jQuery?

.delegate is the only one that is working to me with jQuery JavaScript Library v2.1.1

 $(document).delegate('#textareaID','change', function() {
          console.log("change!");
    });

How to set column header text for specific column in Datagridview C#

If you work with visual studio designer, you will probably have defined fields for each columns in the YourForm.Designer.cs file e.g.:

private System.Windows.Forms.DataGridViewCheckBoxColumn dataGridViewCheckBoxColumn1;    
private System.Windows.Forms.DataGridViewTextBoxColumn dataGridViewTextBoxColumn2;

If you give them useful names, you can set the HeaderText easily:

usefulNameForDataGridViewTextBoxColumn.HeaderText = "Useful Header Text";

Java Thread Example?

create java application in which you define two threads namely t1 and t2, thread t1 will generate random number 0 and 1 (simulate toss a coin ). 0 means head and one means tail. the other thread t2 will do the same t1 and t2 will repeat this loop 100 times and finally your application should determine how many times t1 guesses the number generated by t2 and then display the score. for example if thread t1 guesses 20 number out of 100 then the score of t1 is 20/100 =0.2 if t1 guesses 100 numbers then it gets score 1 and so on

iCheck check if checkbox is checked

To know if the iCheck box is checked

var isChecked = $("#myicheckboxid").prop("checked");

PHP array delete by value (not key)

Or simply, manual way:

foreach ($array as $key => $value){
    if ($value == $target_value) {
        unset($array[$key]);
    }
}

This is the safest of them because you have full control on your array

Translating touch events from Javascript to jQuery

jQuery 'fixes up' events to account for browser differences. When it does so, you can always access the 'native' event with event.originalEvent (see the Special Properties subheading on this page).

How to send a compressed archive that contains executables so that Google's attachment filter won't reject it

tar -cvzf filename.tar.gz directory_to_compress/

Most tar commands have a z option to create a gziped version.

Though seems to me the question is how to circumvent Google. I'm not sure if renaming your output file would fool Google, but you could try. I.e.,

tar -cvzf filename.bla directory_to_compress/

and then send the filename.bla - contents will would be a zipped tar, so at the other end it could be retrieved as usual.

How to use breakpoints in Eclipse

Put breakpoints - double click on the margin. Run > Debug > Yes (if dialog appears), then use commands from Run menu or shortcuts - F5, F6, F7, F8.

OSError: [WinError 193] %1 is not a valid Win32 application

OSError: [WinError 193] %1 is not a valid Win32 application

This error is most probably due to this line import subprocess

I had the same issue and had solved it by uninstalling and reinstalling python and anaconda then i used jupyter and wrote pip install numpy this gave me the whole path where it was getting my site-packages from i deleted my site-packages folder and then the error dissappeared. Actually because i had 2 folders for site-packages one with anaconda and other somewhere in app data(which had some issues in it), since i deleted that site-package folder then it automatically started taking my libraries from site-package folder which was with anaconda hence the problem was solved.

How to get an object's property's value by property name?

Here is an alternative way to get an object's property value:

write-host $(get-something).SomeProp

pip3: command not found but python3-pip is already installed

Same issue on Fedora 23. I had to reinstall python3-pip to generate the proper pip3 folders in /usr/bin/.

sudo dnf reinstall python3-pip

Search for "does-not-contain" on a DataFrame in pandas

I had to get rid of the NULL values before using the command recommended by Andy above. An example:

df = pd.DataFrame(index = [0, 1, 2], columns=['first', 'second', 'third'])
df.ix[:, 'first'] = 'myword'
df.ix[0, 'second'] = 'myword'
df.ix[2, 'second'] = 'myword'
df.ix[1, 'third'] = 'myword'
df

    first   second  third
0   myword  myword   NaN
1   myword  NaN      myword 
2   myword  myword   NaN

Now running the command:

~df["second"].str.contains(word)

I get the following error:

TypeError: bad operand type for unary ~: 'float'

I got rid of the NULL values using dropna() or fillna() first and retried the command with no problem.

/etc/apt/sources.list" E212: Can't open file for writing

For me there was was quite a simple solution. I was trying to edit/create a file in a folder that didn't exist. As I was already in the folder I was trying to edit/create a file in.

i.e. pwd folder/file

and was typing

sudo vim folder/file

and rather obviously it was looking for the folder in the folder and failing to save.

Is there a vr (vertical rule) in html?

Too many overly-complicated answers. Just make a TableData tag that spans how many rows you want it to using rowspan. Then use the right-border for the actual bar.

Example:

<td rowspan="5" style="border-right-color: #000000; border-right-width: thin; border-right-style: solid">&nbsp;</td>
<td rowspan="5">&nbsp;</td>

Ensure that the "&nbsp" in the second line runs the same amount of lines as the first. so that there's proper spacing between both.

This technique has served me rather well with my time in HTML5.

How to use a WSDL file to create a WCF service (not make a call)

There are good resources out there if you know what to search for. Try "Contract First" and WCF. or "WSDL First" and WCF.

Here is a selection:

Basic overview of WSDL-First development with WCF and SvcUtil.exe.
WSCF - A free add-in to Visual Studio enabling Contract-First design with WCF
Article on how to design "WCF-Friendly" WSDL

How to Disable landscape mode in Android?

If you don't want to go through the hassle of adding orientation in each manifest entry of activity better, create a BaseActivity class (inherits 'Activity' or 'AppCompatActivity') which will be inherited by every activity of your application instead of 'Activity' or 'AppCompatActivity' and just add the following piece of code in your BaseActivity:

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    // rest of your code......
}

How to Install Windows Phone 8 SDK on Windows 7

Here is a link from developer.nokia.com wiki pages, which explains how to install Windows Phone 8 SDK on a Virtual Machine with Working Emulator

And another link here

AFAIK, it is not possible to directly install WP8 SDK in Windows 7, because WP8 sdk is VS 2012 supported and also its emulator works on a Hyper-V (which is integrated into the Windows 8).

Inserting a value into all possible locations in a list

Coming from JavaScript, this was something I was used to having "built-in" via Array.prototype.splice(), so I made a Python function that does the same:

def list_splice(target, start, delete_count=None, *items):
    """Remove existing elements and/or add new elements to a list.

    target        the target list (will be changed)
    start         index of starting position
    delete_count  number of items to remove (default: len(target) - start)
    *items        items to insert at start index

    Returns a new list of removed items (or an empty list)
    """
    if delete_count == None:
        delete_count = len(target) - start

    # store removed range in a separate list and replace with *items
    total = start + delete_count
    removed = target[start:total]
    target[start:total] = items

    return removed

Convert canvas to PDF

You can achieve this by utilizing the jsPDF library and the toDataURL function.

I made a little demonstration:

_x000D_

var canvas = document.getElementById('myCanvas');_x000D_
var context = canvas.getContext('2d');_x000D_
_x000D_
// draw a blue cloud_x000D_
context.beginPath();_x000D_
context.moveTo(170, 80);_x000D_
context.bezierCurveTo(130, 100, 130, 150, 230, 150);_x000D_
context.bezierCurveTo(250, 180, 320, 180, 340, 150);_x000D_
context.bezierCurveTo(420, 150, 420, 120, 390, 100);_x000D_
context.bezierCurveTo(430, 40, 370, 30, 340, 50);_x000D_
context.bezierCurveTo(320, 5, 250, 20, 250, 50);_x000D_
context.bezierCurveTo(200, 5, 150, 20, 170, 80);_x000D_
context.closePath();_x000D_
context.lineWidth = 5;_x000D_
context.fillStyle = '#8ED6FF';_x000D_
context.fill();_x000D_
context.strokeStyle = '#0000ff';_x000D_
context.stroke();_x000D_
_x000D_
download.addEventListener("click", function() {_x000D_
  // only jpeg is supported by jsPDF_x000D_
  var imgData = canvas.toDataURL("image/jpeg", 1.0);_x000D_
  var pdf = new jsPDF();_x000D_
_x000D_
  pdf.addImage(imgData, 'JPEG', 0, 0);_x000D_
  pdf.save("download.pdf");_x000D_
}, false);

_x000D_

<script src="//cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.3/jspdf.min.js"></script>_x000D_
_x000D_
_x000D_
<canvas id="myCanvas" width="578" height="200"></canvas>_x000D_
<button id="download">download</button>

_x000D_

Bootstrap 3 navbar active li not changing background-color

In my own bootstrap.css that I load after the bootstrap.min.css only that, switch of the background image with !important works for me:

.navbar-nav li a:hover, .navbar-nav > .active > a {
  color: #fff !important;

  background-color:#f4511e !important;
  background-image: none !important;
}

JUnit 5: How to assert an exception is thrown?

They've changed it in JUnit 5 (expected: InvalidArgumentException, actual: invoked method) and code looks like this one:

@Test
public void wrongInput() {
    Throwable exception = assertThrows(InvalidArgumentException.class,
            ()->{objectName.yourMethod("WRONG");} );
}

Find the maximum value in a list of tuples in Python

In addition to max, you can also sort:

>>> lis
[(101, 153), (255, 827), (361, 961)]
>>> sorted(lis,key=lambda x: x[1], reverse=True)[0]
(361, 961)

List changes unexpectedly after assignment. How do I clone or copy it to prevent this?

A very simple approach independent of python version was missing in already given answers which you can use most of the time (at least I do):

new_list = my_list * 1       #Solution 1 when you are not using nested lists

However, If my_list contains other containers (for eg. nested lists) you must use deepcopy as others suggested in the answers above from the copy library. For example:

import copy
new_list = copy.deepcopy(my_list)   #Solution 2 when you are using nested lists

.Bonus: If you don't want to copy elements use (aka shallow copy):

new_list = my_list[:]

Let's understand difference between Solution#1 and Solution #2

>>> a = range(5)
>>> b = a*1
>>> a,b
([0, 1, 2, 3, 4], [0, 1, 2, 3, 4])
>>> a[2] = 55 
>>> a,b
([0, 1, 55, 3, 4], [0, 1, 2, 3, 4])

As you can see Solution #1 worked perfectly when we were not using the nested lists. Let's check what will happen when we apply solution #1 to nested lists.

>>> from copy import deepcopy
>>> a = [range(i,i+4) for i in range(3)]
>>> a
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5]]
>>> b = a*1
>>> c = deepcopy(a)
>>> for i in (a, b, c): print i   
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5]]
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5]]
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5]]
>>> a[2].append('99')
>>> for i in (a, b, c): print i   
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5, 99]]
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5, 99]]   #Solution#1 didn't work in nested list
[[0, 1, 2, 3], [1, 2, 3, 4], [2, 3, 4, 5]]       #Solution #2 - DeepCopy worked in nested list

MySQL Update Inner Join tables query

The SET clause should come after the table specification.

UPDATE business AS b
INNER JOIN business_geocode g ON b.business_id = g.business_id
SET b.mapx = g.latitude,
  b.mapy = g.longitude
WHERE  (b.mapx = '' or b.mapx = 0) and
  g.latitude > 0

Disable pasting text into HTML form

if you have to use 2 email fields and are concerned about the user incorrectly pasting the same mistyped email from field 1 to field 2 then i'd say show an alert (or something more subtle) if the user pastes something into the second email field

document.querySelector('input.email-confirm').onpaste = function(e) {
    alert('Are you sure the email you\'ve entered is correct?');
}

this way you don't disable paste, you just give them a friendly reminder to check what they've presumably typed in the first field and then pasted to the second field is correct.

however, perhaps a single email field with autocomplete on is all that's needed. chances are they've filled their email in correctly before on another site at some point and the browser will suggest to fill the field with that email

<input type="email" name="email" required autocomplete="email">

File inside jar is not visible for spring

The answer by @sbk is the way we should do it in spring-boot environment (apart from @Value("${classpath*:})), in my opinion. But in my scenario it was not working if the execute from standalone jar..may be I did something wrong.

But this can be another way of doing this,

InputStream is = this.getClass().getClassLoader().getResourceAsStream(<relative path of the resource from resource directory>);

How to get time in milliseconds since the unix epoch in Javascript?

Date.now() returns a unix timestamp in milliseconds.

_x000D_

const now = Date.now(); // Unix timestamp in milliseconds_x000D_
console.log( now );

_x000D_

Prior to ECMAScript5 (I.E. Internet Explorer 8 and older) you needed to construct a Date object, from which there are several ways to get a unix timestamp in milliseconds:

_x000D_

console.log( +new Date );_x000D_
console.log( (new Date).getTime() );_x000D_
console.log( (new Date).valueOf() );

_x000D_

How to convert current date into string in java?

Faster :

String date = FastDateFormat.getInstance("dd-MM-yyyy").format(System.currentTimeMillis( ));

Git removing upstream from local repository

In git version 2.14.3,

You can remove upstream using

git branch --unset-upstream

The above command will also remove the tracking stream branch, hence if you want to rebase from repository you have use

git rebase origin master

instead of git pull --rebase

How can I make a time delay in Python?

A bit of fun with a sleepy generator.

The question is about time delay. It can be fixed time, but in some cases we might need a delay measured since last time. Here is one possible solution:

Delay measured since last time (waking up regularly)

The situation can be, we want to do something as regularly as possible and we do not want to bother with all the last_time, next_time stuff all around our code.

Buzzer generator

The following code (sleepy.py) defines a buzzergen generator:

import time
from itertools import count

def buzzergen(period):
    nexttime = time.time() + period
    for i in count():
        now = time.time()
        tosleep = nexttime - now
        if tosleep > 0:
            time.sleep(tosleep)
            nexttime += period
        else:
            nexttime = now + period
        yield i, nexttime

Invoking regular buzzergen

from sleepy import buzzergen
import time
buzzer = buzzergen(3) # Planning to wake up each 3 seconds
print time.time()
buzzer.next()
print time.time()
time.sleep(2)
buzzer.next()
print time.time()
time.sleep(5) # Sleeping a bit longer than usually
buzzer.next()
print time.time()
buzzer.next()
print time.time()

And running it we see:

1400102636.46
1400102639.46
1400102642.46
1400102647.47
1400102650.47

We can also use it directly in a loop:

import random
for ring in buzzergen(3):
    print "now", time.time()
    print "ring", ring
    time.sleep(random.choice([0, 2, 4, 6]))

And running it we might see:

now 1400102751.46
ring (0, 1400102754.461676)
now 1400102754.46
ring (1, 1400102757.461676)
now 1400102757.46
ring (2, 1400102760.461676)
now 1400102760.46
ring (3, 1400102763.461676)
now 1400102766.47
ring (4, 1400102769.47115)
now 1400102769.47
ring (5, 1400102772.47115)
now 1400102772.47
ring (6, 1400102775.47115)
now 1400102775.47
ring (7, 1400102778.47115)

As we see, this buzzer is not too rigid and allow us to catch up with regular sleepy intervals even if we oversleep and get out of regular schedule.

UIAlertController custom font, size, color

I'm using it.

[[UIView appearanceWhenContainedIn:[UIAlertController class], nil] setTintColor:[UIColor blueColor]];

Add one line (AppDelegate) and works for all UIAlertController.

How can I change cols of textarea in twitter-bootstrap?

UPDATE: As of Bootstrap 3.0, the input-* classes described below for setting the width of input elements were removed. Instead use the col-* classes to set the width of input elements. Examples are provided in the documentation.

In Bootstrap 2.3, you'd use the input classes for setting the width.

<textarea class="input-mini"></textarea>
<textarea class="input-small"></textarea>
<textarea class="input-medium"></textarea>
<textarea class="input-large"></textarea>
<textarea class="input-xlarge"></textarea>
<textarea class="input-xxlarge"></textarea>?
<textarea class="input-block-level"></textarea>?

Do a find for "Control sizing" for examples in the documentation.

But for height I think you'd still use the rows attribute.

Replace negative values in an numpy array

Another minimalist Python solution without using numpy:

[0 if i < 0 else i for i in a]

No need to define any extra functions.

a = [1, 2, 3, -4, -5.23, 6]
[0 if i < 0 else i for i in a]

yields:

[1, 2, 3, 0, 0, 6]

Programs & Examples On #Custom cursor

Change the mouse pointer using JavaScript

Scrollview can host only one direct child

How to remove all options from a dropdown using jQuery / JavaScript

How to remove specific value from array using jQuery

Can we add div inside table above every <tr>?

Programmatically center TextView text

Styling an input type="file" button

How can I embed a YouTube video on GitHub wiki pages?

Error: fix the version conflict (google-services plugin)

Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?

How to get/generate the create statement for an existing hive table?

Declare variable in SQLite and use it

Client on Node.js: Uncaught ReferenceError: require is not defined

SSIS Excel Connection Manager failed to Connect to the Source

How to install plugins to Sublime Text 2 editor?

String contains - ignore case

Find duplicates and delete all in notepad++

Where do I find old versions of Android NDK?

Regular Expression for password validation

_csv.Error: field larger than field limit (131072)

Update

Convert JSON to DataTable

How can I check whether a numpy array is empty or not?

Youtube - downloading a playlist - youtube-dl

IIS7 Settings File Locations

How to export non-exportable private key from store

How to open mail app from Swift

Disabling enter key for form

Update Multiple Rows in Entity Framework from a list of ids

Is it possible to capture a Ctrl+C signal and run a cleanup function, in a "defer" fashion?

How do I resolve a HTTP 414 "Request URI too long" error?

Reading a string with scanf

Append text to file from command line without using io redirection

Responsive timeline UI with Bootstrap3

"Timeline (responsive)" snippet:

Convert JSON string to dict using Python

Return JSON with error status code MVC

Use "ENTER" key on softkeyboard instead of clicking button

HTML / CSS Popup div on text click

what does this mean ? image/png;base64?

Reload an iframe with jQuery

Copy every nth line from one sheet to another

Trigger insert old values- values that was updated

Facebook Graph API : get larger pictures in one request

How to "git show" a merge commit with combined diff output even when every changed file agrees with one of the parents?

.htaccess, order allow, deny, deny from all: confused?

How can I pass some data from one controller to another peer controller

Adjust icon size of Floating action button (fab)

React Native Responsive Font Size

Python: read all text file lines in loop

How to set tbody height with overflow scroll

Deprecated meaning?

Replace a string in shell script using a variable

How to get a jqGrid selected row cells value

How to make my font bold using css?

What is the proper declaration of main in C++?

What is a Java String's default initial value?

How to count the number of files in a directory using Python

How to detect if a string contains special characters?

How can I select all children of an element except the last child?

Get combobox value in Java swing

How to send parameters from a notification-click to an activity?

"find: paths must precede expression:" How do I specify a recursive search that also finds files in the current directory?

Best Way to View Generated Source of Webpage?

Plotting dates on the x-axis with Python's matplotlib

Percentage calculation

What JSON library to use in Scala?

How to get the selected index of a RadioGroup in Android

Using the && operator in an if statement

test attribute in JSTL <c:if> tag

How to enable Auto Logon User Authentication for Google Chrome

jQuery: how to change title of document during .ready()?

Regular expression for floating point numbers

TL;DR

Irregular Regular Expressions

The Trouble with Escaping

A Note about Matching Numbers

Matching versus Validating

Most efficient way to concatenate strings in JavaScript?