Programs & Examples On #Caliper

Caliper is Google's open-source framework for writing, running and viewing the results of Java microbenchmarks.

Where does Visual Studio look for C++ header files?

If the project came with a Visual Studio project file, then that should already be configured to find the headers for you. If not, you'll have to add the include file directory to the project settings by right-clicking the project and selecting Properties, clicking on "C/C++", and adding the directory containing the include files to the "Additional Include Directories" edit box.

Parse string to date with moment.js

No need for moment.js to parse the input since its format is the standard one :

var date = new Date('2014-02-27T10:00:00');
var formatted = moment(date).format('D MMMM YYYY');

http://es5.github.io/#x15.9.1.15

Can't append <script> element

Another way you can do it if you want to append code is using the document.createElement method but then using .innerHTML instead of .src.

var script = document.createElement( 'script' );
script.type = 'text/javascript';
script.innerHTML = 'alert("Hey there... you just appended this script to the body");';
$("body").append( script );

Excel formula to get week number in month (having Monday)

Jonathan from the ExcelCentral forums suggests:

=WEEKNUM(A1,2)-WEEKNUM(DATE(YEAR(A1),MONTH(A1),1),2)+1 

This formula extracts the week of the year [...] and then subtracts it from the week of the first day in the month to get the week of the month. You can change the day that weeks begin by changing the second argument of both WEEKNUM functions (set to 2 [for Monday] in the above example). For weeks beginning on Sunday, use:

=WEEKNUM(A1,1)-WEEKNUM(DATE(YEAR(A1),MONTH(A1),1),1)+1

For weeks beginning on Tuesday, use:

=WEEKNUM(A1,12)-WEEKNUM(DATE(YEAR(A1),MONTH(A1),1),12)+1

etc.

I like it better because it's using the built in week calculation functionality of Excel (WEEKNUM).

Get keys of a Typescript interface as array of strings

Instead of defining IMyTable as in interface, try defining it as a class. In typescript you can use a class like an interface.

So for your example, define/generate your class like this:

export class IMyTable {
    constructor(
        public id = '',
        public title = '',
        public createdAt: Date = null,
        public isDeleted = false
    )
}

Use it as an interface:

export class SomeTable implements IMyTable {
    ...
}

Get keys:

const keys = Object.keys(new IMyTable());

How do you modify a CSS style in the code behind file for divs in ASP.NET?

Another way to do it:

testSpace.Style.Add("display", "none");

or

testSpace.Style["background-image"] = "url(images/foo.png)";

in vb.net you can do it this way:

testSpace.Style.Item("display") = "none"

How to get base url with jquery or javascript?

I've run into this need on several Joomla project. The simplest way I've found to address is to add a hidden input field to my template:

<input type="hidden" id="baseurl" name="baseurl" value="<?php echo $this->baseurl; ?>" />

When I need the value in JavaScript:

var baseurl = document.getElementById('baseurl').value;

Not as fancy as using pure JavaScript but simple and gets the job done.

tsc throws `TS2307: Cannot find module` for a local file

Don't use: import UserController from "api/xxxx" Should be: import UserController from "./api/xxxx"

Can I get image from canvas element and use it in img src tag?

canvas.toDataURL is not working if the original image URL (either relative or absolute) does not belong to the same domain as the web page. Tested from a bookmarklet and a simple javascript in the web page containing the images. Have a look to David Walsh working example. Put the html and images on your own web server, switch original image to relative or absolute URL, change to an external image URL. Only the first two cases are working.

Upgrading Node.js to latest version

Following Upgrading Node.js to latest version

sudo npm cache clean -f
sudo npm install -g n
sudo n stable

sudo ln -sf /usr/local/n/versions/node/<VERSION>/bin/node /usr/bin/node

For Upgrading Node.js to latest version

sudo n latest

If you need to do Undo then follow command

sudo apt-get install --reinstall nodejs-legacy     # fix /usr/bin/node
sudo n rm 6.0.0     # replace number with version of Node that was installed
sudo npm uninstall -g n

This method of upgrading node is now unstable and should not be used. The best way to manage Node.js versions is to use NVM: Node Version Management.!

Installation

You can read the installation steps on the nvm [GitHub page][1]. There are only two easy steps for installation and configuration. Using nvm

If you work with a lot of different Node.js utilities, you know that sometimes you need to quickly switch to other versions of Node.js without hosing your entire machine. That's where you can use nvm to download, install, and use different versions of Node.js:

nvm install 4.0

At any given time you can switch to another with use:

nvm use 0.12

builtins.TypeError: must be str, not bytes

Convert binary file to base64 & vice versa. Prove in python 3.5.2

import base64

read_file = open('/tmp/newgalax.png', 'rb')
data = read_file.read()

b64 = base64.b64encode(data)

print (b64)

# Save file
decode_b64 = base64.b64decode(b64)
out_file = open('/tmp/out_newgalax.png', 'wb')
out_file.write(decode_b64)

# Test in python 3.5.2

Passing structs to functions

bool data(sampleData *data)
{
}

You need to tell the method which type of struct you are using. In this case, sampleData.

Note: In this case, you will need to define the struct prior to the method for it to be recognized.

Example:

struct sampleData
{
   int N;
   int M;
   // ...
};

bool data(struct *sampleData)
{

}

int main(int argc, char *argv[]) {

      sampleData sd;
      data(&sd);

}

Note 2: I'm a C guy. There may be a more c++ish way to do this.

How to set up a PostgreSQL database in Django

$ sudo apt-get install libpq-dev

Year, this solve my problem. After execute this, do: pip install psycopg2

Cannot attach the file *.mdf as database

I think that for SQL Server Local Db you shouldn't use the Initial Catalog property. I suggest to use:

<add name="DefaultConnection" 
     connectionString="Data Source=(LocalDb)\v11.0;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\OdeToFoodDb.mdf" 
     providerName="System.Data.SqlClient" />

I think that local db doesn't support multiple database on the same mdf file so specify an initial catalog is not supported (or not well supported and I have some strange errors).

Submit HTML form, perform javascript function (alert then redirect)

You need to prevent the default behaviour. You can either use e.preventDefault() or return false; In this case, the best thing is, you can use return false; here:

<form onsubmit="completeAndRedirect(); return false;">

How to run VBScript from command line without Cscript/Wscript

Why don't you just stash the vbscript in a batch/vbscript file hybrid. Name the batch hybrid Converter.bat and you can execute it directly as Converter from the cmd line. Sure you can default ALL scripts to run from Cscript or Wscript, but if you want to execute your vbs as a windows script rather than a console script, this could cause some confusion later on. So just set your code to a batch file and run it directly.

Check the answer -> Here

And here is an example:

Converter.bat

::' VBS/Batch Hybrid
::' --- Batch portion ---------
rem^ &@echo off
rem^ &call :'sub
rem^ &exit /b

:'sub
rem^ &echo begin batch
rem^ &cscript //nologo //e:vbscript "%~f0"
rem^ &echo end batch
rem^ &exit /b

'----- VBS portion -----
Dim tester
tester = "Convert data here"
Msgbox tester

How to convert existing non-empty directory into a Git working directory and push files to a remote repository

This is how I do. I have added explanation to understand what the heck is going on.

Initialize Local Repository

  • first initialize Git with

    git init

  • Add all Files for version control with

    git add .

  • Create a commit with message of your choice

    git commit -m 'AddingBaseCode'

Initialize Remote Repository

  • Create a project on GitHub and copy the URL of your project . as shown below:

    enter image description here

Link Remote repo with Local repo

  • Now use copied URL to link your local repo with remote GitHub repo. When you clone a repository with git clone, it automatically creates a remote connection called origin pointing back to the cloned repository. The command remote is used to manage set of tracked repositories.

    git remote add origin https://github.com/hiteshsahu/Hassium-Word.git

Synchronize

  • Now we need to merge local code with remote code. This step is critical otherwise we won't be able to push code on GitHub. You must call 'git pull' before pushing your code.

    git pull origin master --allow-unrelated-histories

Commit your code

  • Finally push all changes on GitHub

    git push -u origin master

Redirect to external URL with return in laravel

For Laravel 5.x we can redirect with just

return redirect()->to($url);

Enum to String C++

Kind of an anonymous lookup table rather than a long switch statement:

return (const char *[]) {
    "bananas & monkeys",
    "Round and orange", 
    "APPLE",
}[enumVal];

Sql script to find invalid email addresses

SELECT EmailAddress AS ValidEmail
FROM Contacts
WHERE EmailAddress LIKE '%_@__%.__%'
        AND PATINDEX('%[^a-z,0-9,@,.,_,\-]%', EmailAddress) = 0
GO

Please check this link: https://blog.sqlauthority.com/2017/11/12/validate-email-address-sql-server-interview-question-week-147/

How can I send emails through SSL SMTP with the .NET Framework?

You can also connect via port 465, but due to some limitations of the System.Net.Mail namespace you may have to alter your code. This is because the namespace does not offer the ability to make implicit SSL connections. This is discussed at http://blogs.msdn.com/b/webdav_101/archive/2008/06/02/system-net-mail-with-ssl-to-authenticate-against-port-465.aspx.

It is possible to make implicit connections without having to use the now obsolete System.Web.Mail namespace, but you have to access the Microsoft CDO (Collaborative Data Object). I have supplied an example of how to use the CDO in another discussion (GMail SMTP via C# .Net errors on all ports).

Hope this helps!

PHP passing $_GET in linux command prompt

I just pass them like this:

php5 script.php param1=blabla param2=yadayada

works just fine, the $_GET array is:

array(3) {
  ["script_php"]=>
  string(0) ""
  ["param1"]=>
  string(6) "blabla"
  ["param2"]=>
  string(8) "yadayada"
}

Delegation: EventEmitter or Observable in Angular

you can use BehaviourSubject as described above or there is one more way:

you can handle EventEmitter like this: first add a selector

import {Component, Output, EventEmitter} from 'angular2/core';

@Component({
// other properties left out for brevity
selector: 'app-nav-component', //declaring selector
template:`
  <div class="nav-item" (click)="selectedNavItem(1)"></div>
`
 })

 export class Navigation {

@Output() navchange: EventEmitter<number> = new EventEmitter();

selectedNavItem(item: number) {
    console.log('selected nav item ' + item);
    this.navchange.emit(item)
}

}

Now you can handle this event like let us suppose observer.component.html is the view of Observer component

<app-nav-component (navchange)="recieveIdFromNav($event)"></app-nav-component>

then in the ObservingComponent.ts

export class ObservingComponent {

 //method to recieve the value from nav component

 public recieveIdFromNav(id: number) {
   console.log('here is the id sent from nav component ', id);
 }

 }

how to add value to combobox item

Instead of adding Reader("Name") you add a new ListItem. ListItem has a Text and a Value property that you can set.

In Python script, how do I set PYTHONPATH?

If you put sys.path.append('dir/to/path') without check it is already added, you could generate a long list in sys.path. For that, I recommend this:

import sys
import os # if you want this directory

try:
    sys.path.index('/dir/path') # Or os.getcwd() for this directory
except ValueError:
    sys.path.append('/dir/path') # Or os.getcwd() for this directory

Please run `npm cache clean`

This error can be due to many many things.

The key here seems the hint about error reading. I see you are working on a flash drive or something similar? Try to run the install on a local folder owned by your current user.

You could also try with sudo, that might solve a permission problem if that's the case.

Another reason why it cannot read could be because it has not downloaded correctly, or saved correctly. A little problem in your network could have caused that, and the cache clean would remove the files and force a refetch but that does not solve your problem. That means it would be more on the save part, maybe it didn't save because of permissions, maybe it didn't not save correctly because it was lacking disk space...

Android Get Application's 'Home' Data Directory

Of course, never fails. Found the solution about a minute after posting the above question... solution for those that may have had the same issue:

ContextWrapper.getFilesDir()

Found here.

Querying date field in MongoDB with Mongoose

{ "date" : "1000000" } in your Mongo doc seems suspect. Since it's a number, it should be { date : 1000000 }

It's probably a type mismatch. Try post.findOne({date: "1000000"}, callback) and if that works, you have a typing issue.

Converting URL to String and back again

Swift 5.

To convert a String to a URL:

let stringToURL = URL(string: "your-string")

To convert a URL to a String:

let urlToString = stringToURL?.absoluteString

Clicking the back button twice to exit an activity

In java

private Boolean exit = false; 

if (exit) {
onBackPressed(); 
}

 @Override
public void onBackPressed() {
    if (exit) {
        finish(); // finish activity
    } else {
        Toast.makeText(this, "Press Back again to Exit.",
                Toast.LENGTH_SHORT).show();
        exit = true;
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                exit = false;
            }
        }, 3 * 1000);

    }
}

In kotlin

 private var exit = false

 if (exit) {
        onBackPressed()
         }

 override fun onBackPressed(){
           if (exit){
               finish() // finish activity
           }else{
            Toast.makeText(this, "Press Back again to Exit.",
                    Toast.LENGTH_SHORT).show()
            exit = true
            Handler().postDelayed({ exit = false }, 3 * 1000)

        }
    }

Select max value of each group

SELECT DISTINCT (t1.ProdId), t1.Quantity FROM Dummy t1 INNER JOIN
       (SELECT ProdId, MAX(Quantity) as MaxQuantity FROM Dummy GROUP BY ProdId) t2
    ON t1.ProdId = t2.ProdId
   AND t1.Quantity = t2.MaxQuantity
 ORDER BY t1.ProdId

this will give you the idea.

showDialog deprecated. What's the alternative?

This code worked for me. Easy fix but probably not a preferred way.

public void onClick (View v) {
    createdDialog(0).show(); // Instead of showDialog(0);
}

protected Dialog createdDialog(int id) {
    // Your code
}

How can one tell the version of React running at runtime in the browser?

From command line to view react version, npm view react version

List the queries running on SQL Server

SELECT 
    p.spid, p.status, p.hostname, p.loginame, p.cpu, r.start_time, t.text
FROM
    sys.dm_exec_requests as r,
    master.dbo.sysprocesses as p
    CROSS APPLY sys.dm_exec_sql_text(p.sql_handle) t
WHERE
    p.status NOT IN ('sleeping', 'background')
AND r.session_id = p.spid

And

KILL @spid

Format a datetime into a string with milliseconds

I assume you mean you're looking for something that is faster than datetime.datetime.strftime(), and are essentially stripping the non-alpha characters from a utc timestamp.

You're approach is marginally faster, and I think you can speed things up even more by slicing the string:

>>> import timeit
>>> t=timeit.Timer('datetime.utcnow().strftime("%Y%m%d%H%M%S%f")','''
... from datetime import datetime''')
>>> t.timeit(number=10000000)
116.15451288223267

>>> def replaceutc(s):
...     return s\
...         .replace('-','') \
...         .replace(':','') \
...         .replace('.','') \
...         .replace(' ','') \
...         .strip()
... 
>>> t=timeit.Timer('replaceutc(str(datetime.datetime.utcnow()))','''
... from __main__ import replaceutc
... import datetime''')
>>> t.timeit(number=10000000)
77.96774983406067

>>> def sliceutc(s):
...     return s[:4] + s[5:7] + s[8:10] + s[11:13] + s[14:16] + s[17:19] + s[20:]
... 
>>> t=timeit.Timer('sliceutc(str(datetime.utcnow()))','''
... from __main__ import sliceutc
... from datetime import datetime''')
>>> t.timeit(number=10000000)
62.378515005111694

How to get the <td> in HTML tables to fit content, and let a specific <td> fill in the rest

demo - http://jsfiddle.net/victor_007/ywevz8ra/

added border for better view (testing)

more info about white-space

table{
    width:100%;
}
table td{
    white-space: nowrap;  /** added **/
}
table td:last-child{
    width:100%;
}

_x000D_
_x000D_
    table {_x000D_
      width: 100%;_x000D_
    }_x000D_
    table td {_x000D_
      white-space: nowrap;_x000D_
    }_x000D_
    table td:last-child {_x000D_
      width: 100%;_x000D_
    }
_x000D_
<table border="1">_x000D_
  <thead>_x000D_
    <tr>_x000D_
      <th>Column A</th>_x000D_
      <th>Column B</th>_x000D_
      <th>Column C</th>_x000D_
      <th class="absorbing-column">Column D</th>_x000D_
    </tr>_x000D_
  </thead>_x000D_
  <tbody>_x000D_
    <tr>_x000D_
      <td>Data A.1 lorem</td>_x000D_
      <td>Data B.1 ip</td>_x000D_
      <td>Data C.1 sum l</td>_x000D_
      <td>Data D.1</td>_x000D_
    </tr>_x000D_
    <tr>_x000D_
      <td>Data A.2 ipsum</td>_x000D_
      <td>Data B.2 lorem</td>_x000D_
      <td>Data C.2 some data</td>_x000D_
      <td>Data D.2 a long line of text that is long</td>_x000D_
    </tr>_x000D_
    <tr>_x000D_
      <td>Data A.3</td>_x000D_
      <td>Data B.3</td>_x000D_
      <td>Data C.3</td>_x000D_
      <td>Data D.3</td>_x000D_
    </tr>_x000D_
  </tbody>_x000D_
</table>
_x000D_
_x000D_
_x000D_

Upload files with HTTPWebrequest (multipart/form-data)

VB Example (converted from C# example on another post):

Private Sub HttpUploadFile( _
    ByVal uri As String, _
    ByVal filePath As String, _
    ByVal fileParameterName As String, _
    ByVal contentType As String, _
    ByVal otherParameters As Specialized.NameValueCollection)

    Dim boundary As String = "---------------------------" & DateTime.Now.Ticks.ToString("x")
    Dim newLine As String = System.Environment.NewLine
    Dim boundaryBytes As Byte() = Text.Encoding.ASCII.GetBytes(newLine & "--" & boundary & newLine)
    Dim request As Net.HttpWebRequest = Net.WebRequest.Create(uri)

    request.ContentType = "multipart/form-data; boundary=" & boundary
    request.Method = "POST"
    request.KeepAlive = True
    request.Credentials = Net.CredentialCache.DefaultCredentials

    Using requestStream As IO.Stream = request.GetRequestStream()

        Dim formDataTemplate As String = "Content-Disposition: form-data; name=""{0}""{1}{1}{2}"

        For Each key As String In otherParameters.Keys

            requestStream.Write(boundaryBytes, 0, boundaryBytes.Length)
            Dim formItem As String = String.Format(formDataTemplate, key, newLine, otherParameters(key))
            Dim formItemBytes As Byte() = Text.Encoding.UTF8.GetBytes(formItem)
            requestStream.Write(formItemBytes, 0, formItemBytes.Length)

        Next key

        requestStream.Write(boundaryBytes, 0, boundaryBytes.Length)

        Dim headerTemplate As String = "Content-Disposition: form-data; name=""{0}""; filename=""{1}""{2}Content-Type: {3}{2}{2}"
        Dim header As String = String.Format(headerTemplate, fileParameterName, filePath, newLine, contentType)
        Dim headerBytes As Byte() = Text.Encoding.UTF8.GetBytes(header)
        requestStream.Write(headerBytes, 0, headerBytes.Length)

        Using fileStream As New IO.FileStream(filePath, IO.FileMode.Open, IO.FileAccess.Read)

            Dim buffer(4096) As Byte
            Dim bytesRead As Int32 = fileStream.Read(buffer, 0, buffer.Length)

            Do While (bytesRead > 0)

                requestStream.Write(buffer, 0, bytesRead)
                bytesRead = fileStream.Read(buffer, 0, buffer.Length)

            Loop

        End Using

        Dim trailer As Byte() = Text.Encoding.ASCII.GetBytes(newLine & "--" + boundary + "--" & newLine)
        requestStream.Write(trailer, 0, trailer.Length)

    End Using

    Dim response As Net.WebResponse = Nothing

    Try

        response = request.GetResponse()

        Using responseStream As IO.Stream = response.GetResponseStream()

            Using responseReader As New IO.StreamReader(responseStream)

                Dim responseText = responseReader.ReadToEnd()
                Diagnostics.Debug.Write(responseText)

            End Using

        End Using

    Catch exception As Net.WebException

        response = exception.Response

        If (response IsNot Nothing) Then

            Using reader As New IO.StreamReader(response.GetResponseStream())

                Dim responseText = reader.ReadToEnd()
                Diagnostics.Debug.Write(responseText)

            End Using

            response.Close()

        End If

    Finally

        request = Nothing

    End Try

End Sub

Do sessions really violate RESTfulness?

First of all, REST is not a religion and should not be approached as such. While there are advantages to RESTful services, you should only follow the tenets of REST as far as they make sense for your application.

That said, authentication and client side state do not violate REST principles. While REST requires that state transitions be stateless, this is referring to the server itself. At the heart, all of REST is about documents. The idea behind statelessness is that the SERVER is stateless, not the clients. Any client issuing an identical request (same headers, cookies, URI, etc) should be taken to the same place in the application. If the website stored the current location of the user and managed navigation by updating this server side navigation variable, then REST would be violated. Another client with identical request information would be taken to a different location depending on the server-side state.

Google's web services are a fantastic example of a RESTful system. They require an authentication header with the user's authentication key to be passed upon every request. This does violate REST principles slightly, because the server is tracking the state of the authentication key. The state of this key must be maintained and it has some sort of expiration date/time after which it no longer grants access. However, as I mentioned at the top of my post, sacrifices must be made to allow an application to actually work. That said, authentication tokens must be stored in a way that allows all possible clients to continue granting access during their valid times. If one server is managing the state of the authentication key to the point that another load balanced server cannot take over fulfilling requests based on that key, you have started to really violate the principles of REST. Google's services ensure that, at any time, you can take an authentication token you were using on your phone against load balance server A and hit load balance server B from your desktop and still have access to the system and be directed to the same resources if the requests were identical.

What it all boils down to is that you need to make sure your authentication tokens are validated against a backing store of some sort (database, cache, whatever) to ensure that you preserve as many of the REST properties as possible.

I hope all of that made sense. You should also check out the Constraints section of the wikipedia article on Representational State Transfer if you haven't already. It is particularly enlightening with regard to what the tenets of REST are actually arguing for and why.

Images can't contain alpha channels or transparencies

You can simply create a new Photoshop document and set its default background to White instead of Transparent. Then, copy and paste your image to the newly created document and save it.

Powershell Get-ChildItem most recent file in directory

Yes I think this would be quicker.

Get-ChildItem $folder | Sort-Object -Descending -Property LastWriteTime -Top 1 

Can an interface extend multiple interfaces in Java?

An interface can extend multiple interfaces.

A class can implement multiple interfaces.

However, a class can only extend a single class.

Careful how you use the words extends and implements when talking about interface and class.

Using continue in a switch statement

Switch is not considered as loop so you cannot use Continue inside a case statement in switch...

How can one run multiple versions of PHP 5.x on a development LAMP server?

I have several projects running on my box. If you have already installed more than one version, this bash script should help you easily switch. At the moment I have php5, php5.6, and php7.0 which I often swtich back and forth depending on the project I am working on. Here is my code.

Feel free to copy. Make sure you understand how the code works. This is for the webhostin. my local box my mods are stored at /etc/apache2/mods-enabled/

    #!/bin/bash
# This file is for switching php versions.  
# To run this file you must use bash, not sh
# 
    # OS: Ubuntu 14.04 but should work on any linux
# Example: bash phpswitch.sh 7.0
# Written by Daniel Pflieger
# growlingflea at g mail dot com

NEWVERSION=$1  #this is the git directory target

#get the active php enabled mod by getting the array of files and store
#it to a variable
VAR=$(ls /etc/apache2/mods-enabled/php*)

#parse the returned variables and get the version of php that is active.
IFS=' ' read -r -a array <<< "$VAR"
array[0]=${array[0]#*php}
array[0]=${array[0]%.conf}


#confirm that the newversion veriable isn't empty.. if it is tell user 
#current version and exit
if [ "$NEWVERSION" = "" ]; then
echo current version is ${array[0]}.  To change version please use argument
exit 1
fi 

OLDVERSION=${array[0]}
#confirm to the user this is what they want to do
echo "Update php"  ${OLDVERSION} to ${NEWVERSION}


#give the user the opportunity to use CTRL-C to exit ot just hit return
read x

#call a2dismod function: this deactivate the current php version
sudo a2dismod php${OLDVERSION}

#call the a2enmod version.  This enables the new mode
sudo a2enmod php${NEWVERSION} 

echo "Restart service??"
read x

#restart apache
sudo service apache2 restart

Is there any native DLL export functions viewer?

dumpbin from the Visual Studio command prompt:

dumpbin /exports csp.dll

Example of output:

Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file csp.dll

File Type: DLL

  Section contains the following exports for CSP.dll

    00000000 characteristics
    3B1D0B77 time date stamp Tue Jun 05 12:40:23 2001
        0.00 version
           1 ordinal base
          25 number of functions
          25 number of names

    ordinal hint RVA      name

          1    0 00001470 CPAcquireContext
          2    1 000014B0 CPCreateHash
          3    2 00001520 CPDecrypt
          4    3 000014B0 CPDeriveKey
          5    4 00001590 CPDestroyHash
          6    5 00001590 CPDestroyKey
          7    6 00001560 CPEncrypt
          8    7 00001520 CPExportKey
          9    8 00001490 CPGenKey
         10    9 000015B0 CPGenRandom
         11    A 000014D0 CPGetHashParam
         12    B 000014D0 CPGetKeyParam
         13    C 00001500 CPGetProvParam
         14    D 000015C0 CPGetUserKey
         15    E 00001580 CPHashData
         16    F 000014F0 CPHashSessionKey
         17   10 00001540 CPImportKey
         18   11 00001590 CPReleaseContext
         19   12 00001580 CPSetHashParam
         20   13 00001580 CPSetKeyParam
         21   14 000014F0 CPSetProvParam
         22   15 00001520 CPSignHash
         23   16 000015A0 CPVerifySignature
         24   17 00001060 DllRegisterServer
         25   18 00001000 DllUnregisterServer

  Summary

        1000 .data
        1000 .rdata
        1000 .reloc
        1000 .rsrc
        1000 .text

Convert a Python list with strings all to lowercase or uppercase

If you are trying to convert all string to lowercase in the list, You can use pandas :

import pandas as pd

data = ['Study', 'Insights']

pd_d = list(pd.Series(data).str.lower())

output:

['study', 'insights']

How to send an email with Python?

Make sure you have granted permission for both Sender and Receiver to send email and receive email from Unknown sources(External Sources) in Email Account.

import smtplib

#Ports 465 and 587 are intended for email client to email server communication - sending email
server = smtplib.SMTP('smtp.gmail.com', 587)

#starttls() is a way to take an existing insecure connection and upgrade it to a secure connection using SSL/TLS.
server.starttls()

#Next, log in to the server
server.login("#email", "#password")

msg = "Hello! This Message was sent by the help of Python"

#Send the mail
server.sendmail("#Sender", "#Reciever", msg)

enter image description here

How do I make a transparent border with CSS?

Many of you must be landing here to find a solution for opaque border instead of a transparent one. In that case you can use rgba, where a stands for alpha.

.your_class {
    height: 100px;
    width: 100px;
    margin: 100px;
    border: 10px solid rgba(255,255,255,.5);
}

Demo

Here, you can change the opacity of the border from 0-1


If you simply want a complete transparent border, the best thing to use is transparent, like border: 1px solid transparent;

Set Google Chrome as the debugging browser in Visual Studio

  1. Go to the visual studio toolbar and click on the dropdown next to CPU (where it says IIS Express in the screenshot). One of the choices should be "Browse With..."

    Visual Studio Toolbar

  2. Select a browser, e.g. Google Chrome, then click Set as Default

    Browse With...

  3. Click Browse or Cancel.

How to uninstall a windows service and delete its files without rebooting

Both Jonathan and Charles are right... you've got to stop the service first, then uninstall/reinstall. Combining their two answers makes the perfect batch file or PowerShell script.

I will make mention of a caution learned the hard way -- Windows 2000 Server (possibly the client OS as well) will require a reboot before the reinstall no matter what. There must be a registry key that is not fully cleared until the box is rebooted. Windows Server 2003, Windows XP and later OS versions do not suffer that pain.

How to break out from a ruby block?

next and break seem to do the correct thing in this simplified example!

class Bar
  def self.do_things
      Foo.some_method(1..10) do |x|
            next if x == 2
            break if x == 9
            print "#{x} "
      end
  end
end

class Foo
    def self.some_method(targets, &block)
      targets.each do |target|
        begin
          r = yield(target)
        rescue  => x
          puts "rescue #{x}"
        end
     end
   end
end

Bar.do_things

output: 1 3 4 5 6 7 8

How to fix Error: laravel.log could not be opened?

If you use cmd

sudo chown -R $USER:www-data storage
sudo chown -R $USER:www-data bootstrap/cache

If you use GUI

First go to the project and right click on the storage and check the properties and go to the Permissions tab

enter image description here

Change the permissions using below code

sudo chmod -R 777 storage

Then your file properties may be

enter image description here

Then check your settings and execute laravel command it will work :)

Accessing Objects in JSON Array (JavaScript)

You can loop the array with a for loop and the object properties with for-in loops.

for (var i=0; i<result.length; i++)
    for (var name in result[i]) {
        console.log("Item name: "+name);
        console.log("Source: "+result[i][name].sourceUuid);
        console.log("Target: "+result[i][name].targetUuid);
    }

Do I need to pass the full path of a file in another directory to open()?

The examples to os.walk in the documentation show how to do this:

for root, dirs, filenames in os.walk(indir):
    for f in filenames:
        log = open(os.path.join(root, f),'r')

How did you expect the "open" function to know that the string "1" is supposed to mean "/home/des/test/1" (unless "/home/des/test" happens to be your current working directory)?

Create an empty list in python with certain size

One simple way to create a 2D matrix of size n using nested list comprehensions:

m = [[None for _ in range(n)] for _ in range(n)]

Test if a string contains a word in PHP?

If you wanna find just the word like 'are' in "How are you?" and not like 'are' in 'hare'

$word=" are ";
$str="How are you?";
if(strpos($word,$str) !== false){
echo 1;
 }

Permutation of array

A simple java implementation, refer to c++ std::next_permutation:

public static void main(String[] args){
    int[] list = {1,2,3,4,5};
    List<List<Integer>> output = new Main().permute(list);
    for(List result: output){
        System.out.println(result);
    }

}

public List<List<Integer>> permute(int[] nums) {
    List<List<Integer>> list = new ArrayList<List<Integer>>();
    int size = factorial(nums.length);

    // add the original one to the list
    List<Integer> seq = new ArrayList<Integer>();
    for(int a:nums){
        seq.add(a);
    }
    list.add(seq);

    // generate the next and next permutation and add them to list
    for(int i = 0;i < size - 1;i++){
        seq = new ArrayList<Integer>();
        nextPermutation(nums);
        for(int a:nums){
            seq.add(a);
        }
        list.add(seq);
    }
    return list;
}


int factorial(int n){
    return (n==1)?1:n*factorial(n-1);
}

void nextPermutation(int[] nums){
    int i = nums.length -1; // start from the end

    while(i > 0 && nums[i-1] >= nums[i]){
        i--;
    }

    if(i==0){
        reverse(nums,0,nums.length -1 );
    }else{

        // found the first one not in order 
        int j = i;

        // found just bigger one
        while(j < nums.length && nums[j] > nums[i-1]){
            j++;
        }
        //swap(nums[i-1],nums[j-1]);
        int tmp = nums[i-1];
        nums[i-1] = nums[j-1];
        nums[j-1] = tmp;
        reverse(nums,i,nums.length-1);  
    }
}

// reverse the sequence
void reverse(int[] arr,int start, int end){
    int tmp;
    for(int i = 0; i <= (end - start)/2; i++ ){
        tmp = arr[start + i];
        arr[start + i] = arr[end - i];
        arr[end - i ] = tmp;
    }
}

Better way to generate array of all letters in the alphabet

static String[] AlphabetWithDigits = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"};

C# : "A first chance exception of type 'System.InvalidOperationException'"

If you check Thrown for Common Language Runtime Exception in the break when an exception window (Ctrl+Alt+E in Visual Studio), then the execution should break while you are debugging when the exception is thrown.

This will probably give you some insight into what is going on.

Example of the exceptions window

jQuery: Selecting by class and input type

You have to use (for checkboxes) :checkbox and the .name attribute to select by class.

For example:

$("input.aclass:checkbox")

The :checkbox selector:

Matches all input elements of type checkbox. Using this psuedo-selector like $(':checkbox') is equivalent to $('*:checkbox') which is a slow selector. It's recommended to do $('input:checkbox').

You should read jQuery documentation to know about selectors.

Return a value if no rows are found in Microsoft tSQL

What about WITH TIES?

SELECT TOP 1 WITH TIES tbl1.* FROM 
        (SELECT CASE WHEN S.Id IS NOT NULL AND S.Status = 1 
                      AND (S.WebUserId = @WebUserId OR 
                           S.AllowUploads = 1)
                     THEN 1 
                     ELSE 0 AS [Value]
         FROM Sites S
         WHERE S.Id = @SiteId) as tbl1
ORDER BY tbl1.[Value]

TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes

Rising to @Ankan-Zerob's challenge, this is my estimate of the maximum length which can be stored in each text type measured in words:

      Type |         Bytes | English words | Multi-byte words
-----------+---------------+---------------+-----------------
  TINYTEXT |           255 |           ±44 |              ±23
      TEXT |        65,535 |       ±11,000 |           ±5,900
MEDIUMTEXT |    16,777,215 |    ±2,800,000 |       ±1,500,000
  LONGTEXT | 4,294,967,295 |  ±740,000,000 |     ±380,000,000

In English, 4.8 letters per word is probably a good average (eg norvig.com/mayzner.html), though word lengths will vary according to domain (e.g. spoken language vs. academic papers), so there's no point being too precise. English is mostly single-byte ASCII characters, with very occasional multi-byte characters, so close to one-byte-per-letter. An extra character has to be allowed for inter-word spaces, so I've rounded down from 5.8 bytes per word. Languages with lots of accents such as say Polish would store slightly fewer words, as would e.g. German with longer words.

Languages requiring multi-byte characters such as Greek, Arabic, Hebrew, Hindi, Thai, etc, etc typically require two bytes per character in UTF-8. Guessing wildly at 5 letters per word, I've rounded down from 11 bytes per word.

CJK scripts (Hanzi, Kanji, Hiragana, Katakana, etc) I know nothing of; I believe characters mostly require 3 bytes in UTF-8, and (with massive simplification) they might be considered to use around 2 characters per word, so they would be somewhere between the other two. (CJK scripts are likely to require less storage using UTF-16, depending).

This is of course ignoring storage overheads etc.

Shell script to capture Process ID and kill it if exist

Kill -9 PID

should be

kill -9 $PID

see the difference?

ReactJS: "Uncaught SyntaxError: Unexpected token <"

I have the same issue with you and I have change something in my server

you might try this

const root = require("path").join(__dirname, "./build");
app.use(express.static(root));
app.get("*", (req, res) => {
  res.sendFile("index.html", { root });
});

SQL - Create view from multiple tables

Union is not what you want. You want to use joins to create single rows. It's a little unclear what constitutes a unique row in your tables and how they really relate to each other and it's also unclear if one table will have rows for every country in every year. But I think this will work:

CREATE VIEW V AS (

  SELECT i.country,i.year,p.pop,f.food,i.income FROM
    INCOME i
  LEFT JOIN 
    POP p 
  ON
    i.country=p.country
  LEFT JOIN
    Food f
  ON 
    i.country=f.country
  WHERE 
    i.year=p.year
  AND
    i.year=f.year
);

The left (outer) join will return rows from the first table even if there are no matches in the second. I've written this assuming you would have a row for every country for every year in the income table. If you don't things get a bit hairy as MySQL does not have built in support for FULL OUTER JOINs last I checked. There are ways to simulate it, and they would involve unions. This article goes into some depth on the subject: http://www.xaprb.com/blog/2006/05/26/how-to-write-full-outer-join-in-mysql/

How to install latest version of Node using Brew

Also, try to deactivate the current node version after installing a new node version. It helps me.

nvm deactivate

This is removed /Users/user_name/.nvm/*/bin from $PATH

And after that node was updated

node --version
v10.9.0

Signing a Windows EXE file

Reference https://steward-fu.github.io/website/driver/wdm/self_sign.htm Note: signtool.exe from Microsoft SDK

1.First time (to make private cert)

Makecert -r -pe -ss YourName YourName.cer

certmgr.exe -add YourName.cer -s -r localMachine root

2.After (to add your sign to your app)

signtool sign /s YourName YourApp.exe

jQuery check if <input> exists and has a value

You could do:

if($('.input1').length && $('.input1').val().length)

length evaluates to false in a condition, when the value is 0.

How to count the number of rows in excel with data?

I compared all possibilities with a long test sheet:

0,140625 sec for

lastrow = calcws.Cells.Find("*", [A1], , , xlByColumns, xlPrevious).row

0 sec for

iLastRow = calcws.Cells(rows.count, "a").End(xlUp).row

and

numofrows = calcws.Cells.SpecialCells(xlLastCell).row

0,0078125 sec for

lastrow = calcws.UsedRange.rows.count
Do While 1
    If calcws.Cells(lastrow, 1).Value = "" Then
        lastrow = lastrow - 1
    Else
        Exit Do
    End If
Loop

I think the favourites are obvious...

How to declare a global variable in php?

You can try the keyword use in Closure functions or Lambdas if this fits your intention... PHP 7.0 though. Not that's its better, but just an alternative.

$foo = "New";
$closure = (function($bar) use ($foo) {
    echo "$foo $bar";
})("York");

demo | info

Access-control-allow-origin with multiple domains

Try this:

<add name="Access-Control-Allow-Origin" value="['URL1','URL2',...]" />

Laravel orderBy on a relationship

I believe you can also do:

$sortDirection = 'desc';

$user->with(['comments' => function ($query) use ($sortDirection) {
    $query->orderBy('column', $sortDirection);
}]);

That allows you to run arbitrary logic on each related comment record. You could have stuff in there like:

$query->where('timestamp', '<', $someTime)->orderBy('timestamp', $sortDirection);

Android : How to set onClick event for Button in List item of ListView

In Adapter Class

public View getView(final int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = getLayoutInflater();
    View row = inflater.inflate(R.layout.vehicals_details_row, parent, false);
    Button deleteImageView = (Button) row.findViewById(R.id.DeleteImageView);
    deleteImageView.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            //...
        }
    });
}

But you can get an issue - listView row not clickable. Solution:

  • make ListView focusable android:focusable="true"
  • Button not focusable android:focusable="false"

failed to find target with hash string 'android-22'

Open project.properties file and change the line with target=android-22 to the desired value.
For example:

target=android-19

Call an angular function inside html

Yep, just add parenthesis (calling the function). Make sure the function is in scope and actually returns something.

<ul class="ui-listview ui-radiobutton" ng-repeat="meter in meters">
  <li class = "ui-divider">
    {{ meter.DESCRIPTION }}
    {{ htmlgeneration() }}
  </li>
</ul>

Is there a way to create xxhdpi, xhdpi, hdpi, mdpi and ldpi drawables from a large scale image?

EDIT:

The website is now called appicon.co


I usually use assets.codly.io
It generates the assets locally in your browser, no upload, no download.

enter image description here

Get key and value of object in JavaScript?

$.each(top_brands, function(index, el) {
  for (var key in el) {
    if (el.hasOwnProperty(key)) {
         brand_options.append($("<option />").val(key).text(key+ " "  + el[key]));
    }
  }
});

But if your data structure is var top_brands = {'Adidas': 100, 'Nike': 50};, then thing will be much more simple.

for (var key in top_brands) {
  if (top_brands.hasOwnProperty(key)) {
       brand_options.append($("<option />").val(key).text(key+ " "  + el[key]));
  }
}

Or use the jquery each:

$.each(top_brands, function(key, value) {
    brand_options.append($("<option />").val(key).text(key + " "  + value));
});

Difference between single and double quotes in Bash

The accepted answer is great. I am making a table that helps in quick comprehension of the topic. The explanation involves a simple variable a as well as an indexed array arr.

If we set

a=apple      # a simple variable
arr=(apple)  # an indexed array with a single element

and then echo the expression in the second column, we would get the result / behavior shown in the third column. The fourth column explains the behavior.

# Expression Result Comments
1 "$a" apple variables are expanded inside ""
2 '$a' $a variables are not expanded inside ''
3 "'$a'" 'apple' '' has no special meaning inside ""
4 '"$a"' "$a" "" is treated literally inside ''
5 '\'' invalid can not escape a ' within ''; use "'" or $'\'' (ANSI-C quoting)
6 "red$arocks" red $arocks does not expand $a; use ${a}rocks to preserve $a
7 "redapple$" redapple$ $ followed by no variable name evaluates to $
8 '\"' \" \ has no special meaning inside ''
9 "\'" \' \' is interpreted inside "" but has no significance for '
10 "\"" " \" is interpreted inside ""
11 "*" * glob does not work inside "" or ''
12 "\t\n" \t\n \t and \n have no special meaning inside "" or ''; use ANSI-C quoting
13 "`echo hi`" hi `` and $() are evaluated inside "" (backquotes are retained in actual output)
14 '`echo hi`' echo hi `` and $() are not evaluated inside '' (backquotes are retained in actual output)
15 '${arr[0]}' ${arr[0]} array access not possible inside ''
16 "${arr[0]}" apple array access works inside ""
17 $'$a\'' $a' single quotes can be escaped inside ANSI-C quoting
18 "$'\t'" $'\t' ANSI-C quoting is not interpreted inside ""
19 '!cmd' !cmd history expansion character '!' is ignored inside ''
20 "!cmd" cmd args expands to the most recent command matching "cmd"
21 $'!cmd' !cmd history expansion character '!' is ignored inside ANSI-C quotes

See also:

Get current date/time in seconds

Based on your comment, I think you're looking for something like this:

var timeout = new Date().getTime() + 15*60*1000; //add 15 minutes;

Then in your check, you're checking:

if(new Date().getTime() > timeout) {
  alert("Session has expired");
}

Changing minDate and maxDate on the fly using jQuery DatePicker

For from / to date, here is how I implemented restricting the dates based on the date entered in the other datepicker. Works pretty good:

function activateDatePickers() {
    $("#aDateFrom").datepicker({
        onClose: function() {
            $("#aDateTo").datepicker(
                    "change",
                    { minDate: new Date($('#aDateFrom').val()) }
            );
        }
    });
    $("#aDateTo").datepicker({
        onClose: function() {
            $("#aDateFrom").datepicker(
                    "change",
                    { maxDate: new Date($('#aDateTo').val()) }
            );
        }
    });
}

Get the value of a dropdown in jQuery

The best way is to use:

$("#yourid option:selected").text();

Depending on the requirement, you could also use this way:

var v = $("#yourid").val();
$("#yourid option[value="+v+"]").text()

JavaScript variable assignments from tuples

You have to do it the ugly way. If you really want something like this, you can check out CoffeeScript, which has that and a whole lot of other features that make it look more like python (sorry for making it sound like an advertisement, but I really like it.)

Change the Theme in Jupyter Notebook?

You Can Follow These Steps.

  1. pip install jupyterthemes or pip install --upgrade jupyterthemes to upgrade to latest version of theme.
  2. after that to list all the themes you have :jt -l
  3. after that jt-t <themename>for example jt -t solarizedl

PHP/Apache: PHP Fatal error: Call to undefined function mysql_connect()

In case anyone else faces this, it's a case of PHP not having access to the mysql client libraries. Having a MySQL server on the system is not the correct fix. Fix for ubuntu (and PHP 5):

sudo apt-get install php5-mysql

After installing the client, the webserver should be restarted. In case you're using apache, the following should work:

sudo service apache2 restart

Is there a way to use two CSS3 box shadows on one element?

You can comma-separate shadows:

box-shadow: inset 0 2px 0px #dcffa6, 0 2px 5px #000;

Build query string for System.Net.HttpClient get

The RFC 6570 URI Template library I'm developing is capable of performing this operation. All encoding is handled for you in accordance with that RFC. At the time of this writing, a beta release is available and the only reason it's not considered a stable 1.0 release is the documentation doesn't fully meet my expectations (see issues #17, #18, #32, #43).

You could either build a query string alone:

UriTemplate template = new UriTemplate("{?params*}");
var parameters = new Dictionary<string, string>
  {
    { "param1", "value1" },
    { "param2", "value2" },
  };
Uri relativeUri = template.BindByName(parameters);

Or you could build a complete URI:

UriTemplate template = new UriTemplate("path/to/item{?params*}");
var parameters = new Dictionary<string, string>
  {
    { "param1", "value1" },
    { "param2", "value2" },
  };
Uri baseAddress = new Uri("http://www.example.com");
Uri relativeUri = template.BindByName(baseAddress, parameters);

Hibernate: "Field 'id' doesn't have a default value"

In my case, I altered that offending tables and the field "id" in question I made it AUTO_INCREMENT, I still need to figure out why on deployment time it was not making it "AUTO_INCREMENT" so that I have to do it by myself!

Get current batchfile directory

Within your .bat file:

set mypath=%cd%

You can now use the variable %mypath% to reference the file path to the .bat file. To verify the path is correct:

@echo %mypath%

For example, a file called DIR.bat with the following contents

set mypath=%cd%
@echo %mypath%
Pause

run from the directory g:\test\bat will echo that path in the DOS command window.

How to fix an UnsatisfiedLinkError (Can't find dependent libraries) in a JNI project

place the required dlls in folder and set the folder path in PATH environment variable. make sure updated environment PATH variable is reflected.

PostgreSQL - query from bash script as database user 'postgres'

To ans to @Jason 's question, in my bash script, I've dome something like this (for my purpose):

dbPass='xxxxxxxx'
.....
## Connect to the DB
PGPASSWORD=${dbPass} psql -h ${dbHost} -U ${myUsr} -d ${myRdb} -P pager=on --set AUTOCOMMIT=off

The another way of doing it is:

psql --set AUTOCOMMIT=off --set ON_ERROR_STOP=on -P pager=on \
     postgresql://${myUsr}:${dbPass}@${dbHost}/${myRdb}

but you have to be very careful about the password: I couldn't make a password with a ' and/or a : to work in that way. So gave up in the end.

-S

How do I mock a REST template exchange?

If your intention is test the service without care about the rest call, I will suggest to not use any annotation in your unit test to simplify the test.

So, my suggestion is refactor your service to receive the resttemplate using injection constructor. This will facilitate the test. Example:

@Service
class SomeService {
    @AutoWired
    SomeService(TestTemplateObjects restTemplateObjects) {
        this.restTemplateObjects = restTemplateObjects;
    }
}

The RestTemplate as component, to be injected and mocked after:

@Component
public class RestTemplateObjects {

    private final RestTemplate restTemplate;

    public RestTemplateObjects () {
        this.restTemplate = new RestTemplate();
        // you can add extra setup the restTemplate here, like errorHandler or converters
    }

    public RestTemplate getRestTemplate() {
        return restTemplate;
    }
}

And the test:

public void test() {

    when(mockedRestTemplateObject.get).thenReturn(mockRestTemplate);

    //mock restTemplate.exchange
    when(mockRestTemplate.exchange(...)).thenReturn(mockedResponseEntity);

    SomeService someService = new SomeService(mockedRestTemplateObject);
    someService.getListofObjectsA();
}

In this way, you have direct access to mock the rest template by the SomeService constructor.

How to Set Focus on Input Field using JQuery

Justin's answer did not work for me (Chromium 18, Firefox 43.0.1). jQuery's .focus() creates visual highlight, but text cursor does not appear in the field (jquery 3.1.0).

Inspired by https://www.sitepoint.com/jqueryhtml5-input-focus-cursor-positions/ , I added autofocus attribute to the input field and voila!

function addfield() {
    n=$('table tr').length;
    $('table').append('<tr><td><input name=field'+n+' autofocus></td><td><input name=value'+n+'></td></tr>');
    $('input[name="aa"'+n+']').focus();
}

Redirecting to previous page after login? PHP

@philipobenito's answer worked best for me.
I first created a hidden input that contain the user's HTTP referer

<input type="hidden" name="referer" value="<?= $_SERVER['HTTP_REFERER'] ?>" />

and after a successful login i redirected the users to whatever value was stored in that hidden input

$_POST = filter_input_array(INPUT_POST, FILTER_SANITIZE_STRING);
if(!empty($_POST['referer'])){
    header('Location: '.$_POST['referer']);
}
else{
    header('Location: members.php'); //members.php is a page used to send a user to their profile page.
}
exit;

How can a divider line be added in an Android RecyclerView?

Kotlin Version:

recyclerview.addItemDecoration(DividerItemDecoration(this, LinearLayoutManager.VERTICAL))

How To Launch Git Bash from DOS Command Line?

I used the info above to help create a more permanent solution. The following will create the alias sh that you can use to open Git Bash:

echo @start "" "%PROGRAMFILES%\Git\bin\sh.exe" --login > %systemroot%\sh.bat

CSS Equivalent of the "if" statement

Your stylesheet should be thought of as a static table of available variables that your html document can call on based on what you need to display. The logic should be in your javascript and html, use javascript to dynamically apply attributes based on conditions if you really need to. Stylesheets are not the place for logic.

Execution failed for task ':app:compileDebugAidl': aidl is missing

I tried to uninstall/install and it did not work. I am running OSX 10.10.3 with Android Studio 1.2.1.1 on JDK 1.8.0_45-b14 and the solution I found to work is similar to Jorge Casariego's recommendation. Basically, out of the box you get a build error for a missing 'aidl' module so simply changing the Build Tools Version to not be version 23.0.0 rc1 will solve your problem. It appears to have a bug.

UPDATE After commenting on an Android issue on their tracker (https://code.google.com/p/android/issues/detail?id=175080) a project member from the Android Tools group commented that to use the Build Tools Version 23.0.0 rc1 you need to be using Android Gradle Plugin 1.3.0-beta1 (Android Studio comes configured with 1.2.3). He also noted (read the issue comments) that the IDE should have given an notification that you need to do this to make it work. For me I have not seen a notification and I've requested clarification from that project member. Nonetheless his guidance solved the issue perfectly so read on.

Solution: Open your build.gradle for your Project (not Module). Find the line classpath com.android.tools.build:gradle:xxx under dependencies where xxx is the Gradle Plugin version and make the update. Save and Rebuild your project. Here is the Android Gradle docs for managing your Gradle versions: https://developer.android.com/tools/revisions/gradle-plugin.html

fatal: bad default revision 'HEAD'

I got the same error and couldn't solve it.

Then I noticed 3 extra files in one of my directories.

The files were named:

config, HEAD, description

I deleted the files, and the error didn't appear.

config contained:

[core]
    repositoryformatversion = 0
    filemode = true
    bare = true

HEAD contained:

ref: refs/heads/master

description contained:

Unnamed repository; edit this file 'description' to name the repository.

ImportError: No module named sqlalchemy

So here is an idea!

Since it seemed to work somewhere else.

install python-virtualenv and optionally you can install virtualenv-wrapper (which is pretty cool to create projects and so on)

In each env, you might have different versions of eggs. In other word, you could have sqlalchemy 1 and sqlaclhemy 1.5 in two different envs and they won't conflict with each others. It seems that you have a problem with your currently installed eggs.

So here we go:

virtualenv --no-site-packages foo
source foo/bin/activate

The parameter --no-site-packages will create a virtualenv and not use the packages already installed on your computer. It's pretty much like a bare python install.

source foo/bin/activate loads the virtualenv.

It's not that really userfriendly. And that's why http://www.doughellmann.com/projects/virtualenvwrapper/ exists.

That said, you should see somthing like thant in your terminal "(foo)user@domain$:" once your virtualenv is activated. It means that you can go on!

Then you have to do.

python setup.py develop of your project. It should download and install dependencies of your project in the virtualenv located in foo. If you need to install anything else, please use pip or easy_install without using sudo. When using virtualenv, you almost never need to use sudo. Sudo will install package in your global python install while it's not required and not really desirable.

If something happens in your virtualenv, you can always delete it and create a new one. This is no big deal. No need to mess with anything. Doesn't work? start over, do pip install -U if needed, define the versions if needed and so on.

Last but not least, in the other answers, it seems that the import changed. If the new versions for flask-sqlalchemy is located somewhere else, you should update your import or install the version you used to use.

Best way to return a value from a python script

If you want your script to return values, just do return [1,2,3] from a function wrapping your code but then you'd have to import your script from another script to even have any use for that information:

Return values (from a wrapping-function)

(again, this would have to be run by a separate Python script and be imported in order to even do any good):

import ...
def main():
    # calculate stuff
    return [1,2,3]

Exit codes as indicators

(This is generally just good for when you want to indicate to a governor what went wrong or simply the number of bugs/rows counted or w/e. Normally 0 is a good exit and >=1 is a bad exit but you could inter-prate them in any way you want to get data out of it)

import sys
# calculate and stuff
sys.exit(100)

And exit with a specific exit code depending on what you want that to tell your governor. I used exit codes when running script by a scheduling and monitoring environment to indicate what has happened.

(os._exit(100) also works, and is a bit more forceful)

Stdout as your relay

If not you'd have to use stdout to communicate with the outside world (like you've described). But that's generally a bad idea unless it's a parser executing your script and can catch whatever it is you're reporting to.

import sys
# calculate stuff
sys.stdout.write('Bugs: 5|Other: 10\n')
sys.stdout.flush()
sys.exit(0)

Are you running your script in a controlled scheduling environment then exit codes are the best way to go.

Files as conveyors

There's also the option to simply write information to a file, and store the result there.

# calculate
with open('finish.txt', 'wb') as fh:
    fh.write(str(5)+'\n')

And pick up the value/result from there. You could even do it in a CSV format for others to read simplistically.

Sockets as conveyors

If none of the above work, you can also use network sockets locally *(unix sockets is a great way on nix systems). These are a bit more intricate and deserve their own post/answer. But editing to add it here as it's a good option to communicate between processes. Especially if they should run multiple tasks and return values.

How can I scroll a web page using selenium webdriver in python?

If you want to scroll down to bottom of infinite page (like linkedin.com), you can use this code:

SCROLL_PAUSE_TIME = 0.5

# Get scroll height
last_height = driver.execute_script("return document.body.scrollHeight")

while True:
    # Scroll down to bottom
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

    # Wait to load page
    time.sleep(SCROLL_PAUSE_TIME)

    # Calculate new scroll height and compare with last scroll height
    new_height = driver.execute_script("return document.body.scrollHeight")
    if new_height == last_height:
        break
    last_height = new_height

Reference: https://stackoverflow.com/a/28928684/1316860

How to change href of <a> tag on button click through javascript

remove href attribute:

<a id="" onclick="f1()">jhhghj</a>

if link styles are important then:

<a href="javascript:void(f1())">jhhghj</a>

ADB.exe is obsolete and has serious performance problems

None of the top-voted answers worked for me, except when I unchecked "Use detected ADB location" as mentioned above by @???. Fortunately, in my case though, the message didn't show up, even when I turned it back on. In other words, the problem might be resolved by restarting "Use detected ADB location" :)

How to compare two java objects

You need to implement the equals() method in your MyClass.

The reason that == didn't work is this is checking that they refer to the same instance. Since you did new for each, each one is a different instance.

The reason that equals() didn't work is because you didn't implement it yourself yet. I believe it's default behavior is the same thing as ==.

Note that you should also implement hashcode() if you're going to implement equals() because a lot of java.util Collections expect that.

How can I pad a value with leading zeros?

Not that this question needs more answers, but I thought I would add the simple lodash version of this.

_.padLeft(number, 6, '0')

How to determine when a Git branch was created?

This is something that I came up with before I found this thread.

git reflog show --date=local --all | sed 's!^.*refs/!refs/!' | grep '/master' | tail -1
git reflog show --date=local --all | sed 's!^.*refs/!refs/!' | grep 'branch:'

Flask SQLAlchemy query, specify column names

You can use the with_entities() method to restrict which columns you'd like to return in the result. (documentation)

result = SomeModel.query.with_entities(SomeModel.col1, SomeModel.col2)

Depending on your requirements, you may also find deferreds useful. They allow you to return the full object but restrict the columns that come over the wire.

Doing a cleanup action just before Node.js exits

After playing around with other answer, here is my solution for this task. Implementing this way helps me centralize cleanup in one place, preventing double handling the cleanup.

  1. I would like to route all other exiting codes to 'exit' code.
const others = [`SIGINT`, `SIGUSR1`, `SIGUSR2`, `uncaughtException`, `SIGTERM`]
others.forEach((eventType) => {
    process.on(eventType, exitRouter.bind(null, { exit: true }));
})
  1. What the exitRouter does is calling process.exit()
function exitRouter(options, exitCode) {
   if (exitCode || exitCode === 0) console.log(`ExitCode ${exitCode}`);
   if (options.exit) process.exit();
}
  1. On 'exit', handle the clean up with a new function
function exitHandler(exitCode) {
  console.log(`ExitCode ${exitCode}`);
  console.log('Exiting finally...')
}

process.on('exit', exitHandler)

For the demo purpose, this is link to my gist. In the file, i add a setTimeout to fake the process running.

If you run node node-exit-demo.js and do nothing, then after 2 seconds, you see the log:

The service is finish after a while.
ExitCode 0
Exiting finally...

Else if before the service finish, you terminate by ctrl+C, you'll see:

^CExitCode SIGINT
ExitCode 0
Exiting finally...

What happened is the Node process exited initially with code SIGINT, then it routes to process.exit() and finally exited with exit code 0.

Removing App ID from Developer Connection

When I do what explains some answers:

Screen Shot 1

The result is:

Screen Shot 2

So, anybody can explain really really how to delete an old App ID?

My opinion is: Apple does not let you remove them. I suppose it is a way to maintain the traceability or the historical of the published.

And of course: application is no longer available in the App Store. It was available (in the past), yes.

CSS '>' selector; what is it?

It is a Child Selector.

It matches when an element is the child of some element. It is made up of two or more selectors separated by ">".

Example(s):

The following rule sets the style of all P elements that are children of BODY:

body > P { line-height: 1.3 }

Example(s):

The following example combines descendant selectors and child selectors:

div ol>li p

It matches a P element that is a descendant of an LI; the LI element must be the child of an OL element; the OL element must be a descendant of a DIV. Notice that the optional white space around the ">" combinator has been left out.

Using array map to filter results with if conditional

You could use flatMap. It can filter and map in one.

$scope.appIds = $scope.applicationsHere.flatMap(obj => obj.selected ? obj.id : [])

Values of disabled inputs will not be submitted

disabled input will not submit data.

Use the readonly attribute:

<input type="text" readonly />

Source here

good example of Javadoc

Download the sources of Lucene and see how they do it. They have good JavaDocs.

How to add leading zeros?

Here is another alternative for adding leading to 0s to strings such as CUSIPs which can sometimes look like a number and which many applications such as Excel will corrupt and remove the leading 0s or convert them to scientific notation.

When I tried the answer provided by @metasequoia the vector returned had leading spaces and not 0s. This was the same problem mentioned by @user1816679 -- and removing the quotes around the 0 or changing from %d to %s did not make a difference either. FYI, I am using RStudio Server running on an Ubuntu Server. This little two-step solution worked for me:

gsub(pattern = " ", replacement = "0", x = sprintf(fmt = "%09s", ids[,CUSIP]))

using the %>% pipe function from the magrittr package it could look like this:

sprintf(fmt = "%09s", ids[,CUSIP]) %>% gsub(pattern = " ", replacement = "0", x = .)

I'd prefer a one-function solution, but it works.

Preferred Java way to ping an HTTP URL for availability

The following code performs a HEAD request to check whether the website is available or not.

public static boolean isReachable(String targetUrl) throws IOException
{
    HttpURLConnection httpUrlConnection = (HttpURLConnection) new URL(
            targetUrl).openConnection();
    httpUrlConnection.setRequestMethod("HEAD");

    try
    {
        int responseCode = httpUrlConnection.getResponseCode();

        return responseCode == HttpURLConnection.HTTP_OK;
    } catch (UnknownHostException noInternetConnection)
    {
        return false;
    }
}

iOS: Multi-line UILabel in Auto Layout

None of the different solutions found in the many topics on the subject worked perfectly for my case (x dynamic multiline labels in dynamic table view cells) .

I found a way to do it :

After having set the constraints on your label and set its multiline property to 0, make a subclass of UILabel ; I called mine AutoLayoutLabel :

@implementation AutoLayoutLabel

- (void)layoutSubviews{
    [self setNeedsUpdateConstraints];
    [super layoutSubviews];
    self.preferredMaxLayoutWidth = CGRectGetWidth(self.bounds);
}

@end

Use SQL Server Management Studio to connect remotely to an SQL Server Express instance hosted on an Azure Virtual Machine

Here are the three web pages on which we found the answer. The most difficult part was setting up static ports for SQLEXPRESS.

Provisioning a SQL Server Virtual Machine on Windows Azure. These initial instructions provided 25% of the answer.

How to Troubleshoot Connecting to the SQL Server Database Engine. Reading this carefully provided another 50% of the answer.

How to configure SQL server to listen on different ports on different IP addresses?. This enabled setting up static ports for named instances (eg SQLEXPRESS.) It took us the final 25% of the way to the answer.

Truncate with condition

The short answer is no: MySQL does not allow you to add a WHERE clause to the TRUNCATE statement. Here's MySQL's documentation about the TRUNCATE statement.

But the good news is that you can (somewhat) work around this limitation.

Simple, safe, clean but slow solution using DELETE

First of all, if the table is small enough, simply use the DELETE statement (it had to be mentioned):

1. LOCK TABLE my_table WRITE;
2. DELETE FROM my_table WHERE my_date<DATE_SUB(NOW(), INTERVAL 1 MONTH);
3. UNLOCK TABLES;

The LOCK and UNLOCK statements are not compulsory, but they will speed things up and avoid potential deadlocks.

Unfortunately, this will be very slow if your table is large... and since you are considering using the TRUNCATE statement, I suppose it's because your table is large.

So here's one way to solve your problem using the TRUNCATE statement:

Simple, fast, but unsafe solution using TRUNCATE

1. CREATE TABLE my_table_backup AS
      SELECT * FROM my_table WHERE my_date>=DATE_SUB(NOW(), INTERVAL 1 MONTH);
2. TRUNCATE my_table;
3. LOCK TABLE my_table WRITE, my_table_backup WRITE;
4. INSERT INTO my_table SELECT * FROM my_table_backup;
5. UNLOCK TABLES;
6. DROP TABLE my_table_backup;

Unfortunately, this solution is a bit unsafe if other processes are inserting records in the table at the same time:

  • any record inserted between steps 1 and 2 will be lost
  • the TRUNCATE statement resets the AUTO-INCREMENT counter to zero. So any record inserted between steps 2 and 3 will have an ID that will be lower than older IDs and that might even conflict with IDs inserted at step 4 (note that the AUTO-INCREMENT counter will be back to it's proper value after step 4).

Unfortunately, it is not possible to lock the table and truncate it. But we can (somehow) work around that limitation using RENAME.

Half-simple, fast, safe but noisy solution using TRUNCATE

1. RENAME TABLE my_table TO my_table_work;
2. CREATE TABLE my_table_backup AS
     SELECT * FROM my_table_work WHERE my_date>DATE_SUB(NOW(), INTERVAL 1 MONTH);
3. TRUNCATE my_table_work;
4. LOCK TABLE my_table_work WRITE, my_table_backup WRITE;
5. INSERT INTO my_table_work SELECT * FROM my_table_backup;
6. UNLOCK TABLES;
7. RENAME TABLE my_table_work TO my_table;
8. DROP TABLE my_table_backup;

This should be completely safe and quite fast. The only problem is that other processes will see table my_table disappear for a few seconds. This might lead to errors being displayed in logs everywhere. So it's a safe solution, but it's "noisy".

Disclaimer: I am not a MySQL expert, so these solutions might actually be crappy. The only guarantee I can offer is that they work fine for me. If some expert can comment on these solutions, I would be grateful.

how to add lines to existing file using python

If you want to append to the file, open it with 'a'. If you want to seek through the file to find the place where you should insert the line, use 'r+'. (docs)

Setting width and height

The below worked for me - but dont forget to put this in the "options" param.

var myChart = new Chart(ctx, {
type: 'line',
data: data,
options: {
    maintainAspectRatio: false,
    responsive:true,
    scales: {
        yAxes: [{
            ticks: {
                beginAtZero: true
            }
        }]
    }
}
});

How to use clock() in C++

An alternative solution, which is portable and with higher precision, available since C++11, is to use std::chrono.

Here is an example:

#include <iostream>
#include <chrono>
typedef std::chrono::high_resolution_clock Clock;

int main()
{
    auto t1 = Clock::now();
    auto t2 = Clock::now();
    std::cout << "Delta t2-t1: " 
              << std::chrono::duration_cast<std::chrono::nanoseconds>(t2 - t1).count()
              << " nanoseconds" << std::endl;
}

Running this on ideone.com gave me:

Delta t2-t1: 282 nanoseconds

Traits vs. interfaces

An interface defines a set of methods that the implementing class must implement.

When a trait is use'd the implementations of the methods come along too--which doesn't happen in an Interface.

That is the biggest difference.

From the Horizontal Reuse for PHP RFC:

Traits is a mechanism for code reuse in single inheritance languages such as PHP. A Trait is intended to reduce some limitations of single inheritance by enabling a developer to reuse sets of methods freely in several independent classes living in different class hierarchies.

KERNELBASE.dll Exception 0xe0434352 offset 0x000000000000a49d

0xe0434352 is the SEH code for a CLR exception. If you don't understand what that means, stop and read A Crash Course on the Depths of Win32™ Structured Exception Handling. So your process is not handling a CLR exception. Don't shoot the messenger, KERNELBASE.DLL is just the unfortunate victim. The perpetrator is MyApp.exe.

There should be a minidump of the crash in DrWatson folders with a full stack, it will contain everything you need to root cause the issue.

I suggest you wire up, in your myapp.exe code, AppDomain.UnhandledException and Application.ThreadException, as appropriate.

Function Pointers in Java

To achieve similar functionality you could use anonymous inner classes.

If you were to define a interface Foo:

interface Foo {
    Object myFunc(Object arg);
}

Create a method bar which will receive a 'function pointer' as an argument:

public void bar(Foo foo) {
    // .....
    Object object = foo.myFunc(argValue);
    // .....
}

Finally call the method as follows:

bar(new Foo() {
    public Object myFunc(Object arg) {
        // Function code.
    }
}

How to check if a map contains a key in Go?

In addition to The Go Programming Language Specification, you should read Effective Go. In the section on maps, they say, amongst other things:

An attempt to fetch a map value with a key that is not present in the map will return the zero value for the type of the entries in the map. For instance, if the map contains integers, looking up a non-existent key will return 0. A set can be implemented as a map with value type bool. Set the map entry to true to put the value in the set, and then test it by simple indexing.

attended := map[string]bool{
    "Ann": true,
    "Joe": true,
    ...
}

if attended[person] { // will be false if person is not in the map
    fmt.Println(person, "was at the meeting")
}

Sometimes you need to distinguish a missing entry from a zero value. Is there an entry for "UTC" or is that 0 because it's not in the map at all? You can discriminate with a form of multiple assignment.

var seconds int
var ok bool
seconds, ok = timeZone[tz]

For obvious reasons this is called the “comma ok” idiom. In this example, if tz is present, seconds will be set appropriately and ok will be true; if not, seconds will be set to zero and ok will be false. Here's a function that puts it together with a nice error report:

func offset(tz string) int {
    if seconds, ok := timeZone[tz]; ok {
        return seconds
    }
    log.Println("unknown time zone:", tz)
    return 0
}

To test for presence in the map without worrying about the actual value, you can use the blank identifier (_) in place of the usual variable for the value.

_, present := timeZone[tz]

Online code beautifier and formatter

For PHP, Java, C++, C, Perl, JavaScript, CSS you can try:

http://www.prettyprinter.de/index.php

Assets file project.assets.json not found. Run a NuGet package restore

If @mostafa-bouzari suggestion doesn't help, check carefully in 'Error list' or 'Output' windows for errors why NuGet cannot restore, e.g. because of net problem if you're behind proxy.

How do I catch a numpy warning like it's an exception (not just for testing)?

Remove warnings.filterwarnings and add:

numpy.seterr(all='raise')

Inserting the iframe into react component

If you don't want to use dangerouslySetInnerHTML then you can use the below mentioned solution

var Iframe = React.createClass({     
  render: function() {
    return(         
      <div>          
        <iframe src={this.props.src} height={this.props.height} width={this.props.width}/>         
      </div>
    )
  }
});

ReactDOM.render(
  <Iframe src="http://plnkr.co/" height="500" width="500"/>,
  document.getElementById('example')
);

here live demo is available Demo

Finding Number of Cores in Java

If you want to get number of physical cores you can run cmd and terminal command and then to parse the output to get info you need.Below is shown function that returns number of physical cores .

private int getNumberOfCPUCores() {
    OSValidator osValidator = new OSValidator();
    String command = "";
    if(osValidator.isMac()){
        command = "sysctl -n machdep.cpu.core_count";
    }else if(osValidator.isUnix()){
        command = "lscpu";
    }else if(osValidator.isWindows()){
        command = "cmd /C WMIC CPU Get /Format:List";
    }
    Process process = null;
    int numberOfCores = 0;
    int sockets = 0;
    try {
        if(osValidator.isMac()){
            String[] cmd = { "/bin/sh", "-c", command};
            process = Runtime.getRuntime().exec(cmd);
        }else{
            process = Runtime.getRuntime().exec(command);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

    BufferedReader reader = new BufferedReader(
            new InputStreamReader(process.getInputStream()));
    String line;

    try {
        while ((line = reader.readLine()) != null) {
            if(osValidator.isMac()){
                numberOfCores = line.length() > 0 ? Integer.parseInt(line) : 0;
            }else if (osValidator.isUnix()) {
                if (line.contains("Core(s) per socket:")) {
                    numberOfCores = Integer.parseInt(line.split("\\s+")[line.split("\\s+").length - 1]);
                }
                if(line.contains("Socket(s):")){
                    sockets = Integer.parseInt(line.split("\\s+")[line.split("\\s+").length - 1]);
                }
            } else if (osValidator.isWindows()) {
                if (line.contains("NumberOfCores")) {
                    numberOfCores = Integer.parseInt(line.split("=")[1]);
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    if(osValidator.isUnix()){
        return numberOfCores * sockets;
    }
    return numberOfCores;
}

OSValidator class:

public class OSValidator {

private static String OS = System.getProperty("os.name").toLowerCase();

public static void main(String[] args) {

    System.out.println(OS);

    if (isWindows()) {
        System.out.println("This is Windows");
    } else if (isMac()) {
        System.out.println("This is Mac");
    } else if (isUnix()) {
        System.out.println("This is Unix or Linux");
    } else if (isSolaris()) {
        System.out.println("This is Solaris");
    } else {
        System.out.println("Your OS is not support!!");
    }
}

public static boolean isWindows() {
    return (OS.indexOf("win") >= 0);
}

public static boolean isMac() {
    return (OS.indexOf("mac") >= 0);
}

public static boolean isUnix() {
    return (OS.indexOf("nix") >= 0 || OS.indexOf("nux") >= 0 || OS.indexOf("aix") > 0 );
}

public static boolean isSolaris() {
    return (OS.indexOf("sunos") >= 0);
}
public static String getOS(){
    if (isWindows()) {
        return "win";
    } else if (isMac()) {
        return "osx";
    } else if (isUnix()) {
        return "uni";
    } else if (isSolaris()) {
        return "sol";
    } else {
        return "err";
    }
}

}

How can I return NULL from a generic method in C#?

Take the recommendation of the error... and either user default(T) or new T.

You will have to add in a comparison in your code to ensure that it was a valid match if you go that route.

Otherwise, potentially consider an output parameter for "match found".

Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception

try adding this dependency org.apache.commons commons-exec 1.3

Valid values for android:fontFamily and what they map to?

As far as I'm aware, you can't declare custom fonts in xml or themes. I usually just make custom classes extending textview that set their own font on instantiation and use those in my layout xml files.

ie:

public class Museo500TextView extends TextView {
    public Museo500TextView(Context context, AttributeSet attrs) {
        super(context, attrs);      
        this.setTypeface(Typeface.createFromAsset(context.getAssets(), "path/to/font.ttf"));
    }
}

and

<my.package.views.Museo900TextView
        android:id="@+id/dialog_error_text_header"
        android:layout_width="190dp"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textSize="12sp" />

Re-enabling window.alert in Chrome

I can see that this only for actually turning the dialogs back on. But if you are a web dev and you would like to see a way to possibly have some form of notification when these are off...in the case that you are using native alerts/confirms for validation or whatever. Check this solution to detect and notify the user https://stackoverflow.com/a/23697435/1248536

Vue template or render function not defined yet I am using neither?

As a Summary of all the posts

This error:

[Vue warn]: Failed to mount component: template or render function not defined.

You're getting because of a certain problem that's preventing your component from being mounted.

This can be caused by a lot of different issues, as you can see from the different posts here. Debug your component thoroughly, and be aware of everything that is maybe not done correctly and might prevent the mount.

I was getting the error when my component file was not encoded correctly...

Using form input to access camera and immediately upload photos using web app

It's really easy to do this, simply send the file via an XHR request inside of the file input's onchange handler.

<input id="myFileInput" type="file" accept="image/*;capture=camera">

var myInput = document.getElementById('myFileInput');

function sendPic() {
    var file = myInput.files[0];

    // Send file here either by adding it to a `FormData` object 
    // and sending that via XHR, or by simply passing the file into 
    // the `send` method of an XHR instance.
}

myInput.addEventListener('change', sendPic, false);

Running Facebook application on localhost

Ok I'm not sure what's up with these answers but I'll let you know what worked for me as advised by a senior dev at my work. I'm working in Ruby on Rails and using Facebook's JavaScript code to get access tokens.

Problem: To do authentication, Facebook is taking the url from your address bar and comparing that with what they have on file. They don't allow you to use localhost:3000 for whatever reason. However, you can use a completely made-up domain name like yoursite.dev by running a local server and pointing yoursite.dev to 127.0.0.1:3000 or wherever your localhost was pointing to.

Step 1: Install or update Nginx

$ brew install nginx (install) or $ brew upgrade nginx (update)

Step 2: Open up your nginx config file

/usr/local/etc/nginx/nginx.conf (usually here)

/opt/boxen/config/nginx/nginx.conf(if you use Boxen)

Step 3 Add this bit of code into your http {} block

Replace proxy_pass with wherever you want to point yoursite.dev to. In my case it was replacing localhost:3000 or the equivalent 127.0.0.1:3000

server {
  listen       yoursite.dev:80;
  server_name  yoursite.dev;
  location / {
    proxy_pass http://127.0.0.1:3000;
  }
}

Step 4: Edit your hosts file, in /etc/hosts on Mac to include

127.0.0.1   yoursite.dev

This file directs domains to localhost. Nginx listens in on localhost and redirects if it matches a rule.

Step 5: Every time you use your dev environment going forward, you use the yoursite.dev in the address bar instead of localhost:3000 so Facebook logs you in correctly.

YAML: Do I need quotes for strings in YAML?

I had this concern when working on a Rails application with Docker.

My most preferred approach is to generally not use quotes. This includes not using quotes for:

  • variables like ${RAILS_ENV}
  • values separated by a colon (:) like postgres-log:/var/log/postgresql
  • other strings values

I, however, use double-quotes for integer values that need to be converted to strings like:

  • docker-compose version like version: "3.8"
  • port numbers like "8080:8080"

However, for special cases like booleans, floats, integers, and other cases, where using double-quotes for the entry values could be interpreted as strings, please do not use double-quotes.

Here's a sample docker-compose.yml file to explain this concept:

version: "3"

services:
  traefik:
    image: traefik:v2.2.1
    command:
      - --api.insecure=true # Don't do that in production
      - --providers.docker=true
      - --providers.docker.exposedbydefault=false
      - --entrypoints.web.address=:80
    ports:
      - "80:80"
      - "8080:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro

That's all.

I hope this helps

how to concatenate two dictionaries to create a new one in Python?

Here's a one-liner (imports don't count :) that can easily be generalized to concatenate N dictionaries:

Python 3

from itertools import chain
dict(chain.from_iterable(d.items() for d in (d1, d2, d3)))

and:

from itertools import chain
def dict_union(*args):
    return dict(chain.from_iterable(d.items() for d in args))

Python 2.6 & 2.7

from itertools import chain
dict(chain.from_iterable(d.iteritems() for d in (d1, d2, d3))

Output:

>>> from itertools import chain
>>> d1={1:2,3:4}
>>> d2={5:6,7:9}
>>> d3={10:8,13:22}
>>> dict(chain.from_iterable(d.iteritems() for d in (d1, d2, d3)))
{1: 2, 3: 4, 5: 6, 7: 9, 10: 8, 13: 22}

Generalized to concatenate N dicts:

from itertools import chain
def dict_union(*args):
    return dict(chain.from_iterable(d.iteritems() for d in args))

I'm a little late to this party, I know, but I hope this helps someone.

Replace one character with another in Bash

Use inline shell string replacement. Example:

foo="  "

# replace first blank only
bar=${foo/ /.}

# replace all blanks
bar=${foo// /.}

See http://tldp.org/LDP/abs/html/string-manipulation.html for more details.

HTML5 and frameborder

I found a nice work around that will allow it to work in IE7 here. It bypasses the validator for the frameBorder attribute but keeps css for future browsers as explained in the post.

Function return value in PowerShell

The existing answers are correct, but sometimes you aren't actually returning something explicitly with a Write-Output or a return, yet there is some mystery value in the function results. This could be the output of a builtin function like New-Item

PS C:\temp> function ContrivedFolderMakerFunction {
>>    $folderName = [DateTime]::Now.ToFileTime()
>>    $folderPath = Join-Path -Path . -ChildPath $folderName
>>    New-Item -Path $folderPath -ItemType Directory
>>    return $true
>> }
PS C:\temp> $result = ContrivedFolderMakerFunction
PS C:\temp> $result


    Directory: C:\temp


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----         2/9/2020   4:32 PM                132257575335253136
True

All that extra noise of the directory creation is being collected and emitted in the output. The easy way to mitigate this is to add | Out-Null to the end of the New-Item statement, or you can assign the result to a variable and just not use that variable. It would look like this...

PS C:\temp> function ContrivedFolderMakerFunction {
>>    $folderName = [DateTime]::Now.ToFileTime()
>>    $folderPath = Join-Path -Path . -ChildPath $folderName
>>    New-Item -Path $folderPath -ItemType Directory | Out-Null
>>    # -or-
>>    $throwaway = New-Item -Path $folderPath -ItemType Directory 
>>    return $true
>> }
PS C:\temp> $result = ContrivedFolderMakerFunction
PS C:\temp> $result
True

New-Item is probably the more famous of these, but others include all of the StringBuilder.Append*() methods, as well as the SqlDataAdapter.Fill() method.

Google server putty connect 'Disconnected: No supported authentication methods available (server sent: publickey)

I had the same issue and just figured it out !!

Assuming that you already went and created private/public key added your public key on the remote server ... type in [email protected] and THEN go to Connection -> SSH -> Auth and click Browse to locate your private key. After you choose it will populate the input field. After that click OPEN ...

So the important thing here is the order... make sure you first enter parameters for the host and then locate your private key.

What characters are valid in a URL?

All the gory details can be found in the current RFC on the topic: RFC 3986 (Uniform Resource Identifier (URI): Generic Syntax)

Based on this related answer, you are looking at a list that looks like: A-Z, a-z, 0-9, -, ., _, ~, :, /, ?, #, [, ], @, !, $, &, ', (, ), *, +, ,, ;, %, and =. Everything else must be url-encoded. Also, some of these characters can only exist in very specific spots in a URI and outside of those spots must be url-encoded (e.g. % can only be used in conjunction with url encoding as in %20), the RFC has all of these specifics.

Storing and retrieving datatable from session

To store DataTable in Session:

DataTable dtTest = new DataTable();
Session["dtTest"] = dtTest; 

To retrieve DataTable from Session:

DataTable dt = (DataTable) Session["dtTest"];

How to make an "alias" for a long path?

Another option would be to use a symbolic link. ie:

ln -s ~/Files/Scripts/Main ~/myFold

After that you can perform operations to ~/myFold, such as:

cp some_file.txt ~/myFold

which will put the file in ~/Files/Scripts/Main. You can remove the symbolic link at any time with rm ~/myFold, which will keep the original directory.

How to get htaccess to work on MAMP

If you have MAMP PRO you can set up a host like mysite.local, then add some options from the 'Advanced' panel in the main window. Just switch on the options 'Indexes' and 'MultiViews'. 'Includes' and 'FollowSymLinks' should already be checked.

how to set default culture info for entire c# application

If you use a Language Resource file to set the labels in your application you need to set the its value:

CultureInfo customCulture = new CultureInfo("en-US");
Languages.Culture = customCulture;

How to check if DST (Daylight Saving Time) is in effect, and if so, the offset?

The moment.js library provides an .isDst() method on its time objects.

moment#isDST checks if the current moment is in daylight saving time.

moment([2011, 2, 12]).isDST(); // false, March 12 2011 is not DST
moment([2011, 2, 14]).isDST(); // true, March 14 2011 is DST

Android - shadow on text?

 <style name="WhiteTextWithShadow" parent="@android:style/TextAppearance">
    <item name="android:shadowDx">1</item>
    <item name="android:shadowDy">1</item>
    <item name="android:shadowRadius">1</item>
    <item name="android:shadowColor">@android:color/black</item>
    <item name="android:textColor">@android:color/white</item>
</style>

then use as

 <TextView
            android:id="@+id/text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="15sp"
            tools:text="Today, May 21"
            style="@style/WhiteTextWithShadow"/>

Remove new lines from string and replace with one empty space

Just use preg_replace()

$string = preg_replace('~[\r\n]+~', '', $string);

You could get away with str_replace() on this one, although the code doesn't look as clean:

$string = str_replace(array("\n", "\r"), '', $string);

See it live on ideone

Unresolved Import Issues with PyDev and Eclipse

There are two ways of solving this issue:

  • Delete the Python interpreter from "Python interpreters" and add it again.
  • Or just add the folder with the libraries in the interpreter you are using in your project, in my case I was using "bottle" and the folder I added was "c:\Python33\Lib\site-packages\bottle-0.11.6-py3.3.egg"

Now I don't see the error anymore, and the code completion feature works as well with "bottle".

Angular - ng: command not found

>> npm uninstall -g angular-cli
>> npm uninstall -g @angular/cli

>> npm cache clean

Restart you machine

then >> npm install -g @angular/cli@latest

set Path : C:\Users\admin\AppData\Roaming\npm\node_modules@angular\cli

Hope you never get 'ng' not found

How to grep with a list of words

To find a very long list of words in big files, it can be more efficient to use egrep:

remove the last \n of A
$ tr '\n' '|' < A > A_regex
$ egrep -f A_regex B

How to return a string value from a Bash function

The options have been all enumerated, I think. Choosing one may come down to a matter of the best style for your particular application, and in that vein, I want to offer one particular style I've found useful. In bash, variables and functions are not in the same namespace. So, treating the variable of the same name as the value of the function is a convention that I find minimizes name clashes and enhances readability, if I apply it rigorously. An example from real life:

UnGetChar=
function GetChar() {
    # assume failure
    GetChar=
    # if someone previously "ungot" a char
    if ! [ -z "$UnGetChar" ]; then
        GetChar="$UnGetChar"
        UnGetChar=
        return 0               # success
    # else, if not at EOF
    elif IFS= read -N1 GetChar ; then
        return 0           # success
    else
        return 1           # EOF
    fi
}

function UnGetChar(){
    UnGetChar="$1"
}

And, an example of using such functions:

function GetToken() {
    # assume failure
    GetToken=
    # if at end of file
    if ! GetChar; then
        return 1              # EOF
    # if start of comment
    elif [[ "$GetChar" == "#" ]]; then
        while [[ "$GetChar" != $'\n' ]]; do
            GetToken+="$GetChar"
            GetChar
        done
        UnGetChar "$GetChar"
    # if start of quoted string
    elif [ "$GetChar" == '"' ]; then
# ... et cetera

As you can see, the return status is there for you to use when you need it, or ignore if you don't. The "returned" variable can likewise be used or ignored, but of course only after the function is invoked.

Of course, this is only a convention. You are free to fail to set the associated value before returning (hence my convention of always nulling it at the start of the function) or to trample its value by calling the function again (possibly indirectly). Still, it's a convention I find very useful if I find myself making heavy use of bash functions.

As opposed to the sentiment that this is a sign one should e.g. "move to perl", my philosophy is that conventions are always important for managing the complexity of any language whatsoever.

ISO C++ forbids comparison between pointer and integer [-fpermissive]| [c++]

char a[2] defines an array of char's. a is a pointer to the memory at the beginning of the array and using == won't actually compare the contents of a with 'ab' because they aren't actually the same types, 'ab' is integer type. Also 'ab' should be "ab" otherwise you'll have problems here too. To compare arrays of char you'd want to use strcmp.

Something that might be illustrative is looking at the typeid of 'ab':

#include <iostream>
#include <typeinfo>
using namespace std;
int main(){
    int some_int =5;
    std::cout << typeid('ab').name() << std::endl;
    std::cout << typeid(some_int).name() << std::endl;
    return 0;
}

on my system this returns:

i
i

showing that 'ab' is actually evaluated as an int.

If you were to do the same thing with a std::string then you would be dealing with a class and std::string has operator == overloaded and will do a comparison check when called this way.

If you wish to compare the input with the string "ab" in an idiomatic c++ way I suggest you do it like so:

#include <iostream>
#include <string>
using namespace std;
int main(){
    string a;
    cout<<"enter ab ";
    cin>>a;
    if(a=="ab"){
         cout<<"correct";
    }
    return 0;
}

This one is due to:

if(a=='ab') , here, a is const char* type (ie : array of char)

'ab' is a constant value,which isn't evaluated as string (because of single quote) but will be evaluated as integer.

Since char is a primitive type inherited from C, no operator == is defined.

the good code should be:

if(strcmp(a,"ab")==0) , then you'll compare a const char* to another const char* using strcmp.

Reading Data From Database and storing in Array List object

If your customer class has static variables remove them so your class should look something like this.

public class customer {

     private int id;
     private String name;
     private String DOB;

    public int getId() {
        return id;
    }
    public String getName() {
        return name;
    }
    public String getDOB() {
        return DOB;
    }
     public void setId(int id) {
        this.id = id;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void setDOB(String dOB) {
        this.DOB = dOB;
    }

instead of something like

public class customer {

     private static int id;
     private static String name;
     private static String DOB;

    public static int getId() {
        return id;
    }
    public static String getName() {
        return name;
    }
    public static String getDOB() {
        return DOB;
    }
     public static void setId(int id) {
        custumer.id = id;
    }
    public  static void setName(String name) {
        customer.name = name;
    }
    public static void setDOB(String dOB) {
        customer.DOB = dOB;
    }

How to round the corners of a button

enter image description here

For Objective C:

submitButton.layer.cornerRadius = 5;
submitButton.clipsToBounds = YES;

For Swift:

submitButton.layer.cornerRadius = 5
submitButton.clipsToBounds = true

PHP salt and hash SHA256 for login password

You can't do that because you can not know the salt at a precise time. Below, a code who works in theory (not tested for the syntaxe)

<?php
$password1 = $_POST['password'];
$salt      = 'hello_1m_@_SaLT';
$hashed    = hash('sha256', $password1 . $salt);
?>

When you insert :

$qry="INSERT INTO member VALUES('$username', '$hashed')";

And for retrieving user :

$qry="SELECT * FROM member WHERE username='$username' AND password='$hashed'";

Detect whether there is an Internet connection available on Android

The getActiveNetworkInfo() method of ConnectivityManager returns a NetworkInfo instance representing the first connected network interface it can find or null if none if the interfaces are connected. Checking if this method returns null should be enough to tell if an internet connection is available.

private boolean isNetworkAvailable() {
     ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
     NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
     return activeNetworkInfo != null; 
}

You will also need:

in your android manifest.

Edit:

Note that having an active network interface doesn't guarantee that a particular networked service is available. Networks issues, server downtime, low signal, captive portals, content filters and the like can all prevent your app from reaching a server. For instance you can't tell for sure if your app can reach Twitter until you receive a valid response from the Twitter service.

getActiveNetworkInfo() shouldn't never give null. I don't know what they were thinking when they came up with that. It should give you an object always.

Convert NSDate to NSString

I don't know how we all missed this: localizedStringFromDate:dateStyle:timeStyle:

NSString *dateString = [NSDateFormatter localizedStringFromDate:[NSDate date] 
                                                      dateStyle:NSDateFormatterShortStyle 
                                                      timeStyle:NSDateFormatterFullStyle];
NSLog(@"%@",dateString);

outputs '13/06/12 00:22:39 GMT+03:00'

CSS transition fade in

OK, first of all I'm not sure how it works when you create a div using (document.createElement('div')), so I might be wrong now, but wouldn't it be possible to use the :target pseudo class selector for this?

If you look at the code below, you can se I've used a link to target the div, but in your case it might be possible to target #new from the script instead and that way make the div fade in without user interaction, or am I thinking wrong?

Here's the code for my example:

HTML

<a href="#new">Click</a> 
<div id="new">
    Fade in ... 
</div>

CSS

#new {
    width: 100px;
    height: 100px;
    border: 1px solid #000000;
    opacity: 0;    
}


#new:target {
    -webkit-transition: opacity 2.0s ease-in;
       -moz-transition: opacity 2.0s ease-in;
         -o-transition: opacity 2.0s ease-in;
                                  opacity: 1;
}

... and here's a jsFiddle

How to BULK INSERT a file into a *temporary* table where the filename is a variable?

It is possible to do everything you want. Aaron's answer was not quite complete.

His approach is correct, up to creating the temporary table in the inner query. Then, you need to insert the results into a table in the outer query.

The following code snippet grabs the first line of a file and inserts it into the table @Lines:

declare @fieldsep char(1) = ',';
declare @recordsep char(1) = char(10);

declare @Lines table (
    line varchar(8000)
);

declare @sql varchar(8000) = ' 
    create table #tmp (
        line varchar(8000)
    );

    bulk insert #tmp
        from '''+@filename+'''
        with (FirstRow = 1, FieldTerminator = '''+@fieldsep+''', RowTerminator = '''+@recordsep+''');

    select * from #tmp';

insert into @Lines
    exec(@sql);

select * from @lines

Getting the source HTML of the current page from chrome extension

Here is my solution:

chrome.runtime.onMessage.addListener(function(request, sender) {
        if (request.action == "getSource") {
            this.pageSource = request.source;
            var title = this.pageSource.match(/<title[^>]*>([^<]+)<\/title>/)[1];
            alert(title)
        }
    });

    chrome.tabs.query({ active: true, currentWindow: true }, tabs => {
        chrome.tabs.executeScript(
            tabs[0].id,
            { code: 'var s = document.documentElement.outerHTML; chrome.runtime.sendMessage({action: "getSource", source: s});' }
        );
    });

sql query with multiple where statements

What is meta_key? Strip out all of the meta_value conditionals, reduce, and you end up with this:

SELECT
*
FROM
meta_data
WHERE
(
        (meta_key = 'lat')
)
AND
(
        (meta_key = 'long')
)
GROUP BY
item_id

Since meta_key can never simultaneously equal two different values, no results will be returned.


Based on comments throughout this question and answers so far, it sounds like you're looking for something more along the lines of this:

SELECT
*
FROM
meta_data
WHERE
(
    (meta_key = 'lat')
    AND
    (
        (meta_value >= '60.23457047672217')
        OR
        (meta_value <= '60.23457047672217')
    )
)
OR
(
    (meta_key = 'long')
    AND
    (
        (meta_value >= '24.879140853881836')
        OR
        (meta_value <= '24.879140853881836')
    )
)
GROUP BY
item_id

Note the OR between the top-level conditionals. This is because you want records which are lat or long, since no single record will ever be lat and long.

I'm still not sure what you're trying to accomplish by the inner conditionals. Any non-null value will match those numbers. So maybe you can elaborate on what you're trying to do there. I'm also not sure about the purpose of the GROUP BY clause, but that might be outside the context of this question entirely.

How to get rid of punctuation using NLTK tokenizer?

I use this code to remove punctuation:

import nltk
def getTerms(sentences):
    tokens = nltk.word_tokenize(sentences)
    words = [w.lower() for w in tokens if w.isalnum()]
    print tokens
    print words

getTerms("hh, hh3h. wo shi 2 4 A . fdffdf. A&&B ")

And If you want to check whether a token is a valid English word or not, you may need PyEnchant

Tutorial:

 import enchant
 d = enchant.Dict("en_US")
 d.check("Hello")
 d.check("Helo")
 d.suggest("Helo")

Manually type in a value in a "Select" / Drop-down HTML list?

I faced the same basic problem: trying to combine the functionality of a textbox and a select box which are fundamentally different things in the html spec.

The good news is that selectize.js does exactly this:

Selectize is the hybrid of a textbox and box. It's jQuery-based and it's useful for tagging, contact lists, country selectors, and so on.

Fastest way to remove first char in a String

I know this is hyper-optimization land, but it seemed like a good excuse to kick the wheels of BenchmarkDotNet. The result of this test (on .NET Core even) is that Substring is ever so slightly faster than Remove, in this sample test: 19.37ns vs 22.52ns for Remove. So some ~16% faster.

using System;
using BenchmarkDotNet.Attributes;

namespace BenchmarkFun
{
    public class StringSubstringVsRemove
    {
        public readonly string SampleString = " My name is Daffy Duck.";

        [Benchmark]
        public string StringSubstring() => SampleString.Substring(1);

        [Benchmark]
        public string StringRemove() => SampleString.Remove(0, 1);

        public void AssertTestIsValid()
        {
            string subsRes = StringSubstring();
            string remvRes = StringRemove();

            if (subsRes == null
                || subsRes.Length != SampleString.Length - 1
                || subsRes != remvRes) {
                throw new Exception("INVALID TEST!");
            }
        }
    }

    class Program
    {
        static void Main()
        {
            // let's make sure test results are really equal / valid
            new StringSubstringVsRemove().AssertTestIsValid();

            var summary = BenchmarkRunner.Run<StringSubstringVsRemove>();
        }
    }
}

Results:

BenchmarkDotNet=v0.11.4, OS=Windows 10.0.17763.253 (1809/October2018Update/Redstone5)
Intel Core i7-6700HQ CPU 2.60GHz (Skylake), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=3.0.100-preview-010184
  [Host]     : .NET Core 3.0.0-preview-27324-5 (CoreCLR 4.6.27322.0, CoreFX 4.7.19.7311), 64bit RyuJIT
  DefaultJob : .NET Core 3.0.0-preview-27324-5 (CoreCLR 4.6.27322.0, CoreFX 4.7.19.7311), 64bit RyuJIT

|          Method |     Mean |     Error |    StdDev |
|---------------- |---------:|----------:|----------:|
| StringSubstring | 19.37 ns | 0.3940 ns | 0.3493 ns |
|    StringRemove | 22.52 ns | 0.4062 ns | 0.3601 ns |

Retrieve a single file from a repository

To export a single file from a remote:

git archive --remote=ssh://host/pathto/repo.git HEAD README.md | tar -x

This will download the file README.md to your current directory.

If you want the contents of the file exported to STDOUT:

git archive --remote=ssh://host/pathto/repo.git HEAD README.md | tar -xO

You can provide multiple paths at the end of the command.

Ubuntu: OpenJDK 8 - Unable to locate package

As you can see I only have java 1.7 installed (on a Ubuntu 14.04 machine).

update-java-alternatives -l
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64

To install Java 8, I did,

sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk

Afterwards, now I have java 7 and 8,

update-java-alternatives -l
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64
java-1.8.0-openjdk-amd64 1069 /usr/lib/jvm/java-1.8.0-openjdk-amd64

BONUS ADDED (how to switch between different versions)

  • run the follwing command from the terminal:

sudo update-alternatives --config java

There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                            Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      auto mode
  1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
* 2            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1069      manual mode

Press enter to keep the current choice[*], or type selection number:

As you can see I'm running open jdk 8. To switch to to jdk 7, press 1 and hit the Enter key. Do the same for javac as well with, sudo update-alternatives --config javac.

Check versions to confirm the change: java -version and javac -version.

C# Equivalent of SQL Server DataTypes

SQL Server and .Net Data Type mapping

SQL Server and .Net Data Type mapping

Convert Unicode to ASCII without errors in Python

Looks like you are using python 2.x. Python 2.x defaults to ascii and it doesn’t know about Unicode. Hence the exception.

Just paste the below line after shebang, it will work

# -*- coding: utf-8 -*-

"RangeError: Maximum call stack size exceeded" Why?

Browsers can't handle that many arguments. See this snippet for example:

alert.apply(window, new Array(1000000000));

This yields RangeError: Maximum call stack size exceeded which is the same as in your problem.

To solve that, do:

var arr = [];
for(var i = 0; i < 1000000; i++){
    arr.push(Math.random());
}

How to parse JSON boolean value?

A boolean is not an integer; 1 and 0 are not boolean values in Java. You'll need to convert them explicitly:

boolean multipleContacts = (1 == jsonObject.getInt("MultipleContacts"));

or serialize the ints as booleans from the start.

Change a branch name in a Git repo

If you're currently on the branch you want to rename:

git branch -m new_name 

Or else:

git branch -m old_name new_name 

You can check with:

git branch -a

As you can see, only the local name changed Now, to change the name also in the remote you must do:

git push origin :old_name

This removes the branch, then upload it with the new name:

git push origin new_name

Source: https://web.archive.org/web/20150929104013/http://blog.changecong.com:80/2012/10/rename-a-remote-branch-on-github

Function or sub to add new row and data to table

I needed this same solution, but if you use the native ListObject.Add() method then you avoid the risk of clashing with any data immediately below the table. The below routine checks the last row of the table, and adds the data in there if it's blank; otherwise it adds a new row to the end of the table:

Sub AddDataRow(tableName As String, values() As Variant)
    Dim sheet As Worksheet
    Dim table As ListObject
    Dim col As Integer
    Dim lastRow As Range

    Set sheet = ActiveWorkbook.Worksheets("Sheet1")
    Set table = sheet.ListObjects.Item(tableName)

    'First check if the last row is empty; if not, add a row
    If table.ListRows.Count > 0 Then
        Set lastRow = table.ListRows(table.ListRows.Count).Range
        For col = 1 To lastRow.Columns.Count
            If Trim(CStr(lastRow.Cells(1, col).Value)) <> "" Then
                table.ListRows.Add
                Exit For
            End If
        Next col
    Else
        table.ListRows.Add
    End If

    'Iterate through the last row and populate it with the entries from values()
    Set lastRow = table.ListRows(table.ListRows.Count).Range
    For col = 1 To lastRow.Columns.Count
        If col <= UBound(values) + 1 Then lastRow.Cells(1, col) = values(col - 1)
    Next col
End Sub

To call the function, pass the name of the table and an array of values, one value per column. You can get / set the name of the table from the Design tab of the ribbon, in Excel 2013 at least: enter image description here

Example code for a table with three columns:

Dim x(2)
x(0) = 1
x(1) = "apple"
x(2) = 2
AddDataRow "Table1", x

GCC -fPIC option

Position Independent Code means that the generated machine code is not dependent on being located at a specific address in order to work.

E.g. jumps would be generated as relative rather than absolute.

Pseudo-assembly:

PIC: This would work whether the code was at address 100 or 1000

100: COMPARE REG1, REG2
101: JUMP_IF_EQUAL CURRENT+10
...
111: NOP

Non-PIC: This will only work if the code is at address 100

100: COMPARE REG1, REG2
101: JUMP_IF_EQUAL 111
...
111: NOP

EDIT: In response to comment.

If your code is compiled with -fPIC, it's suitable for inclusion in a library - the library must be able to be relocated from its preferred location in memory to another address, there could be another already loaded library at the address your library prefers.

Differences between Emacs and Vim

Now you do not even need to think about the difference between these two because of Spacemacs. It is a community-driven Emacs distribution.

As it said,

The best editor is neither Emacs nor vim, It's Emacs and Vim.

Spacemacs combines the best from both Emacs and Vim, which make your life and job much easier.

See screenshot below,


(source: spacemacs.org)

google maps v3 marker info window on mouseover

Thanks to duncan answer, I end up with this:

marker.addListener('mouseover', () => infoWindow.open(map, marker))
marker.addListener('mouseout', () => infoWindow.close())

merge two object arrays with Angular 2 and TypeScript?

try this

 data => {
                this.results = [...this.results, ...data.results];
                this._next = data.next;
            }

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

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

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


EDIT:

I presume, your TABLE DDL would be like this.

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

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

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

Combinations And Result:

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

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

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

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

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

1 row created.

Spring JSON request getting 406 (not Acceptable)

I was having the same problem because I was missing the @EnableWebMvc annotation. (All of my spring configurations are annotation-based, the XML equivalent would be mvc:annotation-driven)

javascript create empty array of a given size

You can use both javascript methods repeat() and split() together.

" ".repeat(10).split(" ")

This code will create an array that has 10 item and each item is empty string.

_x000D_
_x000D_
const items = " ".repeat(10).split(" ")

document.getElementById("context").innerHTML = items.map((item, index) => index)

console.log("items: ", items)
_x000D_
<pre id="context">

</pre>
_x000D_
_x000D_
_x000D_

Bootstrap col-md-offset-* not working

Changing col-md-offset-* to offset-md-* worked for me

How do you compare structs for equality in C?

You may be tempted to use memcmp(&a, &b, sizeof(struct foo)), but it may not work in all situations. The compiler may add alignment buffer space to a structure, and the values found at memory locations lying in the buffer space are not guaranteed to be any particular value.

But, if you use calloc or memset the full size of the structures before using them, you can do a shallow comparison with memcmp (if your structure contains pointers, it will match only if the address the pointers are pointing to are the same).

Increasing (or decreasing) the memory available to R processes

Use memory.limit(). You can increase the default using this command, memory.limit(size=2500), where the size is in MB. You need to be using 64-bit in order to take real advantage of this.

One other suggestion is to use memory efficient objects wherever possible: for instance, use a matrix instead of a data.frame.

Checking if a file is a directory or just a file

Yes, there is better. Check the stat or the fstat function

How to use GROUP_CONCAT in a CONCAT in MySQL

Try:

CREATE TABLE test (
  ID INTEGER,
  NAME VARCHAR (50),
  VALUE INTEGER
);

INSERT INTO test VALUES (1, 'A', 4);
INSERT INTO test VALUES (1, 'A', 5);
INSERT INTO test VALUES (1, 'B', 8);
INSERT INTO test VALUES (2, 'C', 9);

SELECT ID, GROUP_CONCAT(NAME ORDER BY NAME ASC SEPARATOR ',')
FROM (
  SELECT ID, CONCAT(NAME, ':', GROUP_CONCAT(VALUE ORDER BY VALUE ASC SEPARATOR ',')) AS NAME
  FROM test
  GROUP BY ID, NAME
) AS A
GROUP BY ID;

SQL Fiddle: http://sqlfiddle.com/#!2/b5abe/9/0

Why is the gets function so dangerous that it should not be used?

In C11(ISO/IEC 9899:201x), gets() has been removed. (It's deprecated in ISO/IEC 9899:1999/Cor.3:2007(E))

In addition to fgets(), C11 introduces a new safe alternative gets_s():

C11 K.3.5.4.1 The gets_s function

#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>
char *gets_s(char *s, rsize_t n);

However, in the Recommended practice section, fgets() is still preferred.

The fgets function allows properly-written programs to safely process input lines too long to store in the result array. In general this requires that callers of fgets pay attention to the presence or absence of a new-line character in the result array. Consider using fgets (along with any needed processing based on new-line characters) instead of gets_s.

How to validate an Email in PHP?

Stay away from regex and filter_var() solutions for validating email. See this answer: https://stackoverflow.com/a/42037557/953833

How to capture the browser window close event?

Maybe just unbind the beforeunload event handler within the form's submit event handler:

jQuery('form').submit(function() {
    jQuery(window).unbind("beforeunload");
    ...
});

AWS CLI S3 A client error (403) occurred when calling the HeadObject operation: Forbidden

I was getting a 403 on HEAD requests while the GET requests were working. It turned out to be the CORS config in s3 permissions. I had to add HEAD

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
    <AllowedOrigin>*</AllowedOrigin>
    <AllowedMethod>HEAD</AllowedMethod>
    <AllowedMethod>PUT</AllowedMethod>
    <AllowedMethod>POST</AllowedMethod>
    <AllowedMethod>GET</AllowedMethod>
    <AllowedHeader>*</AllowedHeader>
</CORSRule>
</CORSConfiguration>

The HTTP request is unauthorized with client authentication scheme 'Ntlm'

1) I had to do the following with my configuration: (Add BackConnectionHostNames or Disable Loopback Check) http://support.microsoft.com/kb/896861

2) I was working off a dev system on an isolated dev network. I had gotten it working using the dev system's computer name in the URL to the web service, but when I modified the URL to the URL that would be used in production (rather than the computer name), I started getting the NTLM error.

3) I noticed the security log showed that the service account failing to login with an error similar to the one in the MSDN article.

4) Adding the BackConnectionHostNames made it so I could log into the server via a browser running on the server, but the service account still had NTLM errors when trying to authenticate for the web services. I wound up disabling the loop back check and that fixed it for me.