Programs & Examples On #Projectlocker

angular 4: *ngIf with multiple conditions

You got a ninja ')'.

Try :

<div *ngIf="currentStatus !== 'open' || currentStatus !== 'reopen'">

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

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

Technically, the first bit is equivalent to

Allow From All

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

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

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

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

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

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

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

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

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

The equivalent Apache 2.4 configuration should look like:

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

PHP sessions that have already been started

session_status() === PHP_SESSION_ACTIVE ?: session_start();

Closed Game

Remove an item from an IEnumerable<T> collection

Not removing but creating a new List without that element with LINQ:

// remove
users = users.Where(u => u.userId != 123).ToList();

// new list
var modified = users.Where(u => u.userId == 123).ToList();

How to convert Varchar to Double in sql?

This might be more desirable, that is use float instead

SELECT fullName, CAST(totalBal as float) totalBal FROM client_info ORDER BY totalBal DESC

Qt jpg image display

If the only thing you want to do is drop in an image onto a widget withouth the complexity of the graphics API, you can also just create a new QWidget and set the background with StyleSheets. Something like this:

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
    ...
    QWidget *pic = new QWidget(this);
    pic->setStyleSheet("background-image: url(test.png)");
    pic->setGeometry(QRect(50,50,128,128));
    ...
}

How to set JAVA_HOME for multiple Tomcat instances?

If you are a Windows user, put the content below in a setenv.bat file that you must create in Tomcat bin directory.

set JAVA_HOME=C:\Program Files\Java\jdk1.6.x

If you are a Linux user, put the content below in a setenv.sh file that you must create in Tomcat bin directory.

JAVA_HOME=/usr/java/jdk1.6.x

how to display employee names starting with a and then b in sql

select columns
  from table
 where (
         column like 'a%' 
      or column like 'b%' )
 order by column asc

How to change the style of alert box?

I use SweetAlert, It's Awesome, You will get lots of customization option as well as all callbacks

Screenshot

swal("Here's a message!", "It's pretty, isn't it?");

enter image description here

HTML Button : Navigate to Other Page - Different Approaches

I use method 3 because it's the most understandable for others (whenever you see an <a> tag, you know it's a link) and when you are part of a team, you have to make simple things ;).

And finally I don't think it's useful and efficient to use JS simply to navigate to an other page.

How do I execute a file in Cygwin?

gcc under cygwin does not generate a Linux executable output file of type " ELF 32-bit LSB executable," but it generates a windows executable of type "PE32 executable for MS Windows" which has a dependency on cygwin1.dll, so it needs to be run under cygwin shell. If u need to run it under dos prompt independently, they cygwin1.dll needs to be in your Windows PATH.

-AD.

FIND_IN_SET() vs IN()

because the second query is looking for rows with the id's 1 OR 2 OR 3, the first query is looking for a one of the comma delimited values to exist in companyID,

and another problem here is you aren't joining the tables on a common key in your where so you are going to get a mutation of rows that = count(table1) * count(table2);

Your problem really exists with part 2 of my answer. (with your second query)

Get yesterday's date using Date

Update

There has been recent improvements in datetime API with JSR-310.

Instant now = Instant.now();
Instant yesterday = now.minus(1, ChronoUnit.DAYS);
System.out.println(now);
System.out.println(yesterday);

https://ideone.com/91M1eU

Outdated answer

You are subtracting the wrong number:

Use Calendar instead:

private Date yesterday() {
    final Calendar cal = Calendar.getInstance();
    cal.add(Calendar.DATE, -1);
    return cal.getTime();
}

Then, modify your method to the following:

private String getYesterdayDateString() {
        DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        return dateFormat.format(yesterday());
}

See

Best way to alphanumeric check in JavaScript

I would create a String prototype method:

String.prototype.isAlphaNumeric = function() {
  var regExp = /^[A-Za-z0-9]+$/;
  return (this.match(regExp));
};

Then, the usage would be:

var TCode = document.getElementById('TCode').value;
return TCode.isAlphaNumeric()

npm install errors with Error: ENOENT, chmod

I have a similar problem specifucally : ERR! enoent ENOENT: no such file or directory, chmod 'node_modules/npm/node_modules/request/node_modules/http-signature/node_modules/sshpk/bin/sshpk-conv I tried all above solutions but no luck. I was using vagrant box, and the project was in a shared folder. The problems seems to be only there, when I move the project to another not shared folder (woth host), voila! problem solved. Just in case another person was using also vagrant

The connection to adb is down, and a severe error has occurred

Sounds a bit familiar with my problem: aapt not found under the right path

I needed to clean all open projects to get it working again...

Change Name of Import in Java, or import two classes with the same name

It's probably worth noting that Groovy has this feature:

import java.util.Calendar
import com.example.Calendar as MyCalendar

MyCalendar myCalendar = new MyCalendar()

php: catch exception and continue execution, is it possible?

Sure:

try {
   throw new Exception('Something bad');
} catch (Exception $e) {
    // Do nothing
}

You might want to go have a read of the PHP documentation on Exceptions.

Drop unused factor levels in a subsetted data frame

Another way of doing the same but with dplyr

library(dplyr)
subdf <- df %>% filter(numbers <= 3) %>% droplevels()
str(subdf)

Edit:

Also Works ! Thanks to agenis

subdf <- df %>% filter(numbers <= 3) %>% droplevels
levels(subdf$letters)

Make .gitignore ignore everything except a few files

That's what have worked for me, I wanted to commit only one Cordova plugin to the repo:

...
plugins/*
!plugins/cordova-plugin-app-customization

How to disable 'X-Frame-Options' response header in Spring Security?

By default X-Frame-Options is set to denied, to prevent clickjacking attacks. To override this, you can add the following into your spring security config

<http>    
    <headers>
        <frame-options policy="SAMEORIGIN"/>
    </headers>
</http>

Here are available options for policy

  • DENY - is a default value. With this the page cannot be displayed in a frame, regardless of the site attempting to do so.
  • SAMEORIGIN - I assume this is what you are looking for, so that the page will be (and can be) displayed in a frame on the same origin as the page itself
  • ALLOW-FROM - Allows you to specify an origin, where the page can be displayed in a frame.

For more information take a look here.

And here to check how you can configure the headers using either XML or Java configs.

Note, that you might need also to specify appropriate strategy, based on needs.

Generate sha256 with OpenSSL and C++

Using OpenSSL's EVP interface (the following is for OpenSSL 1.1):

#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>
#include <openssl/evp.h>

bool computeHash(const std::string& unhashed, std::string& hashed)
{
    bool success = false;

    EVP_MD_CTX* context = EVP_MD_CTX_new();

    if(context != NULL)
    {
        if(EVP_DigestInit_ex(context, EVP_sha256(), NULL))
        {
            if(EVP_DigestUpdate(context, unhashed.c_str(), unhashed.length()))
            {
                unsigned char hash[EVP_MAX_MD_SIZE];
                unsigned int lengthOfHash = 0;

                if(EVP_DigestFinal_ex(context, hash, &lengthOfHash))
                {
                    std::stringstream ss;
                    for(unsigned int i = 0; i < lengthOfHash; ++i)
                    {
                        ss << std::hex << std::setw(2) << std::setfill('0') << (int)hash[i];
                    }

                    hashed = ss.str();
                    success = true;
                }
            }
        }

        EVP_MD_CTX_free(context);
    }

    return success;
}

int main(int, char**)
{
    std::string pw1 = "password1", pw1hashed;
    std::string pw2 = "password2", pw2hashed;
    std::string pw3 = "password3", pw3hashed;
    std::string pw4 = "password4", pw4hashed;

    hashPassword(pw1, pw1hashed);
    hashPassword(pw2, pw2hashed);
    hashPassword(pw3, pw3hashed);
    hashPassword(pw4, pw4hashed);

    std::cout << pw1hashed << std::endl;
    std::cout << pw2hashed << std::endl;
    std::cout << pw3hashed << std::endl;
    std::cout << pw4hashed << std::endl;

    return 0;
}

The advantage of this higher level interface is that you simply need to swap out the EVP_sha256() call with another digest's function, e.g. EVP_sha512(), to use a different digest. So it adds some flexibility.

MVC4 Passing model from view to controller

I hope this complete example will help you.

This is the TaxiInfo class which holds information about a taxi ride:

namespace Taxi.Models
{
    public class TaxiInfo
    {
        public String Driver { get; set; }
        public Double Fare { get; set; }
        public Double Distance { get; set; }
        public String StartLocation { get; set; }
        public String EndLocation { get; set; }
    }
}

We also have a convenience model which holds a List of TaxiInfo(s):

namespace Taxi.Models
{
    public class TaxiInfoSet
    {
        public List<TaxiInfo> TaxiInfoList { get; set; }

        public TaxiInfoSet(params TaxiInfo[] TaxiInfos)
        {
            TaxiInfoList = new List<TaxiInfo>();

            foreach(var TaxiInfo in TaxiInfos)
            {
                TaxiInfoList.Add(TaxiInfo);
            }
        }
    }
}

Now in the home controller we have the default Index action which for this example makes two taxi drivers and adds them to the list contained in a TaxiInfo:

public ActionResult Index()
{
    var taxi1 = new TaxiInfo() { Fare = 20.2, Distance = 15, Driver = "Billy", StartLocation = "Perth", EndLocation = "Brisbane" };
    var taxi2 = new TaxiInfo() { Fare = 2339.2, Distance = 1500, Driver = "Smith", StartLocation = "Perth", EndLocation = "America" };

    return View(new TaxiInfoSet(taxi1,taxi2));
}

The code for the view is as follows:

@model Taxi.Models.TaxiInfoSet
@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

@foreach(var TaxiInfo in Model.TaxiInfoList){
    <form>
        <h1>Cost: [email protected]</h1>
        <h2>Distance: @(TaxiInfo.Distance) km</h2>
        <p>
            Our diver, @TaxiInfo.Driver will take you from @TaxiInfo.StartLocation to @TaxiInfo.EndLocation
        </p>
        @Html.ActionLink("Home","Booking",TaxiInfo)
    </form>
}

The ActionLink is responsible for the re-directing to the booking action of the Home controller (and passing in the appropriate TaxiInfo object) which is defiend as follows:

    public ActionResult Booking(TaxiInfo Taxi)
    {
        return View(Taxi);
    }

This returns a the following view:

@model Taxi.Models.TaxiInfo

@{
    ViewBag.Title = "Booking";
}

<h2>Booking For</h2>
<h1>@Model.Driver, going from @Model.StartLocation to @Model.EndLocation (a total of @Model.Distance km) for [email protected]</h1>

A visual tour:

The Index view

The Booking view

Cleanest Way to Invoke Cross-Thread Events

I've always wondered how costly it is to always assume that invoke is required...

private void OnCoolEvent(CoolObjectEventArgs e)
{
  BeginInvoke((o,e) => /*do work here*/,this, e);
}

What is the best way to ensure only one instance of a Bash script is running?

I found a pretty simple way to handle "one copy of script per system". It doesn't allow me to run multiple copies of the script from many accounts though (on standard Linux that is).

Solution:

At the beginning of script, I gave:

pidof -s -o '%PPID' -x $( basename $0 ) > /dev/null 2>&1 && exit

Apparently pidof works great in a way that:

  • it doesn't have limit on program name like ps -C ...
  • it doesn't require me to do grep -v grep ( or anything similar )

And it doesn't rely on lockfiles, which for me is a big win, because relaying on them means you have to add handling of stale lockfiles - which is not really complicated, but if it can be avoided - why not?

As for checking with "one copy of script per running user", i wrote this, but I'm not overly happy with it:

(
    pidof -s -o '%PPID' -x $( basename $0 ) | tr ' ' '\n'
    ps xo pid= | tr -cd '[0-9\n]'
) | sort | uniq -d

and then I check its output - if it's empty - there are no copies of the script from same user.

JavaScript Regular Expression Email Validation

I have been using this one....

/^[\w._-]+[+]?[\w._-]+@[\w.-]+\.[a-zA-Z]{2,6}$/

It allows that + before @ ([email protected])

How to add a recyclerView inside another recyclerView

you can use LayoutInflater to inflate your dynamic data as a layout file.

UPDATE : first create a LinearLayout inside your CardView's layout and assign an ID for it. after that create a layout file that you want to inflate. at last in your onBindViewHolder method in your "RAdaper" class. write these codes :

  mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

  view = mInflater.inflate(R.layout.my_list_custom_row, parent, false);

after that you can initialize data and ClickListeners with your RAdapter Data. hope it helps.

this and this may useful :)

How to replace NaN values by Zeroes in a column of a Pandas Dataframe?

I just wanted to provide a bit of an update/special case since it looks like people still come here. If you're using a multi-index or otherwise using an index-slicer the inplace=True option may not be enough to update the slice you've chosen. For example in a 2x2 level multi-index this will not change any values (as of pandas 0.15):

idx = pd.IndexSlice
df.loc[idx[:,mask_1],idx[mask_2,:]].fillna(value=0,inplace=True)

The "problem" is that the chaining breaks the fillna ability to update the original dataframe. I put "problem" in quotes because there are good reasons for the design decisions that led to not interpreting through these chains in certain situations. Also, this is a complex example (though I really ran into it), but the same may apply to fewer levels of indexes depending on how you slice.

The solution is DataFrame.update:

df.update(df.loc[idx[:,mask_1],idx[[mask_2],:]].fillna(value=0))

It's one line, reads reasonably well (sort of) and eliminates any unnecessary messing with intermediate variables or loops while allowing you to apply fillna to any multi-level slice you like!

If anybody can find places this doesn't work please post in the comments, I've been messing with it and looking at the source and it seems to solve at least my multi-index slice problems.

UILabel font size?

Try to change your label frame size height and width so your text not cut.

 [label setframe:CGRect(x,y,widht,height)];

Regular expression to match standard 10 digit phone number

This code will match a US or Canadian phone number, and will also make sure that it is a valid area code and exchange:

^((\+1)?[\s-]?)?\(?[2-9]\d\d\)?[\s-]?[2-9]\d\d[\s-]?\d\d\d\d

Test on Regex101.com

Can I draw rectangle in XML?

Create rectangle.xml using Shape Drawable Like this put in to your Drawable Folder...

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
   <solid android:color="@android:color/transparent"/>
   <corners android:radius="12px"/> 
   <stroke  android:width="2dip" android:color="#000000"/>  
</shape>

put it in to an ImageView

<ImageView 
android:id="@+id/rectimage" 
android:layout_height="150dp" 
android:layout_width="150dp" 
android:src="@drawable/rectangle">
</ImageView>

Hope this will help you.

How to run batch file from network share without "UNC path are not supported" message?

Basically, you can't run it from a UNC path without seeing that message.

What I usually do is just put a CLS at the top of the script so I don't have to see that message. Then, specify the full path to files in the network share that you need to use.

Better way to call javascript function in a tag

Modern browsers support a Content Security Policy or CSP. This is the highest level of web security and strongly recommended if you can apply it because it completely blocks all XSS attacks.

Both of your suggestions break with CSP enabled because they allow inline Javascript (which could be injected by a hacker) to execute in your page.

The best practice is to subscribe to the event in Javascript, as in Konrad Rudolph's answer.

Get final URL after curl is redirected

Thanks, that helped me. I made some improvements and wrapped that in a helper script "finalurl":

#!/bin/bash
curl $1 -s -L -I -o /dev/null -w '%{url_effective}'
  • -o output to /dev/null
  • -I don't actually download, just discover the final URL
  • -s silent mode, no progressbars

This made it possible to call the command from other scripts like this:

echo `finalurl http://someurl/`

Concatenating Files And Insert New Line In Between Files

That's how I just did it on OsX 10.10.3

for f in *.txt; do (cat $f; echo '') >> fullData.txt; done

since the simple 'echo' command with no params ended up in no new lines inserted.

Remove Blank option from Select Option with AngularJS

It is kind of a workaround but works like a charm. Just add <option value="" style="display: none"></option> as a filler. Like in:

<select size="4" ng-model="feed.config" ng-options="template.value as template.name for template in feed.configs">
       <option value="" style="display: none"></option>
</select>

How to get the excel file name / path in VBA

   strScriptFullname = WScript.ScriptFullName 
   strScriptPath = Left(strScriptFullname, InStrRev(strScriptFullname,"\")) 

How to set default value for column of new created table from select statement in 11g

You can specify the constraints and defaults in a CREATE TABLE AS SELECT, but the syntax is as follows

create table t1 (id number default 1 not null);
insert into t1 (id) values (2);

create table t2 (id default 1 not null)
as select * from t1;

That is, it won't inherit the constraints from the source table/select. Only the data type (length/precision/scale) is determined by the select.

OSX - How to auto Close Terminal window after the "exit" command executed.

Use the osascript command in your code as icktoofay mentioned: osascript -e 'tell application "Terminal" to quit'

Then, open Terminal preferences, go to Settings > Shell, and set "Prompt before closing:" to "Never." Terminal should now quit completely (not remain open in your dock) and ignore the prompt before quitting. If you have only one Terminal window open and the osascript command is your last line of code, it should wait for whatever command you ran before to finish.

This would not be ideal if you are running scripts in the same window or other windows in the background (for instance, you may run a command in the background and continue using the current window for other commands if the first command is followed by an ampersand); be careful!

If you wrap the osascript code in a shell script file, you can probably call it with whatever pithy file-name you give it---as long as it is in Terminal's search path (run echo $PATH to see where Terminal looks for scripts).

SQL User Defined Function Within Select

Yes, you can do almost that:

SELECT dbo.GetBusinessDays(a.opendate,a.closedate) as BusinessDays
FROM account a
WHERE...

Python's equivalent of && (logical-and) in an if-statement

Two comments:

  • Use and and or for logical operations in Python.
  • Use 4 spaces to indent instead of 2. You will thank yourself later because your code will look pretty much the same as everyone else's code. See PEP 8 for more details.

How to select multiple files with <input type="file">?

The whole thing should look like:

<form enctype='multipart/form-data' method='POST' action='submitFormTo.php'> 
    <input type='file' name='files[]' multiple />
    <button type='submit'>Submit</button>
</form>

Make sure you have the enctype='multipart/form-data' attribute in your <form> tag, or you can't read the files on the server side after submission!

Format telephone and credit card numbers in AngularJS

I took aberke's solution and modified it to suit my taste.

  • It produces a single input element
  • It optionally accepts extensions
  • For US numbers it skips the leading country code
  • Standard naming conventions
  • Uses class from using code; doesn't make up a class
  • Allows use of any other attributes allowed on an input element

My Code Pen

_x000D_
_x000D_
var myApp = angular.module('myApp', []);_x000D_
_x000D_
myApp.controller('exampleController',_x000D_
  function exampleController($scope) {_x000D_
    $scope.user = { profile: {HomePhone: '(719) 465-0001 x1234'}};_x000D_
    $scope.homePhonePrompt = "Home Phone";_x000D_
  });_x000D_
_x000D_
myApp_x000D_
/*_x000D_
    Intended use:_x000D_
    <phone-number placeholder='prompt' model='someModel.phonenumber' />_x000D_
    Where: _x000D_
      someModel.phonenumber: {String} value which to bind formatted or unformatted phone number_x000D_
_x000D_
    prompt: {String} text to keep in placeholder when no numeric input entered_x000D_
*/_x000D_
.directive('phoneNumber',_x000D_
  ['$filter',_x000D_
  function ($filter) {_x000D_
    function link(scope, element, attributes) {_x000D_
_x000D_
      // scope.inputValue is the value of input element used in template_x000D_
      scope.inputValue = scope.phoneNumberModel;_x000D_
_x000D_
      scope.$watch('inputValue', function (value, oldValue) {_x000D_
_x000D_
        value = String(value);_x000D_
        var number = value.replace(/[^0-9]+/g, '');_x000D_
        scope.inputValue = $filter('phoneNumber')(number, scope.allowExtension);_x000D_
        scope.phoneNumberModel = scope.inputValue;_x000D_
      });_x000D_
    }_x000D_
_x000D_
    return {_x000D_
      link: link,_x000D_
      restrict: 'E',_x000D_
      replace: true,_x000D_
      scope: {_x000D_
        phoneNumberPlaceholder: '@placeholder',_x000D_
        phoneNumberModel: '=model',_x000D_
        allowExtension: '=extension'_x000D_
      },_x000D_
      template: '<input ng-model="inputValue" type="tel" placeholder="{{phoneNumberPlaceholder}}" />'_x000D_
    };_x000D_
  }_x000D_
  ]_x000D_
)_x000D_
/* _x000D_
    Format phonenumber as: (aaa) ppp-nnnnxeeeee_x000D_
    or as close as possible if phonenumber length is not 10_x000D_
    does not allow country code or extensions > 5 characters long_x000D_
*/_x000D_
.filter('phoneNumber', _x000D_
  function() {_x000D_
    return function(number, allowExtension) {_x000D_
      /* _x000D_
      @param {Number | String} number - Number that will be formatted as telephone number_x000D_
      Returns formatted number: (###) ###-#### x #####_x000D_
      if number.length < 4: ###_x000D_
      else if number.length < 7: (###) ###_x000D_
      removes country codes_x000D_
      */_x000D_
      if (!number) {_x000D_
        return '';_x000D_
      }_x000D_
_x000D_
      number = String(number);_x000D_
      number = number.replace(/[^0-9]+/g, '');_x000D_
      _x000D_
      // Will return formattedNumber. _x000D_
      // If phonenumber isn't longer than an area code, just show number_x000D_
      var formattedNumber = number;_x000D_
_x000D_
      // if the first character is '1', strip it out _x000D_
      var c = (number[0] == '1') ? '1 ' : '';_x000D_
      number = number[0] == '1' ? number.slice(1) : number;_x000D_
_x000D_
      // (###) ###-#### as (areaCode) prefix-endxextension_x000D_
      var areaCode = number.substring(0, 3);_x000D_
      var prefix = number.substring(3, 6);_x000D_
      var end = number.substring(6, 10);_x000D_
      var extension = number.substring(10, 15);_x000D_
_x000D_
      if (prefix) {_x000D_
        //formattedNumber = (c + "(" + area + ") " + front);_x000D_
        formattedNumber = ("(" + areaCode + ") " + prefix);_x000D_
      }_x000D_
      if (end) {_x000D_
        formattedNumber += ("-" + end);_x000D_
      }_x000D_
      if (allowExtension && extension) {_x000D_
        formattedNumber += ("x" + extension);_x000D_
      }_x000D_
      return formattedNumber;_x000D_
    };_x000D_
  }_x000D_
);
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>_x000D_
<div ng-app="myApp" ng-controller="exampleController">_x000D_
  <p>Phone Number Value: {{ user.profile.HomePhone || 'null' }}</p>_x000D_
  <p>Formatted Phone Number: {{ user.profile.HomePhone | phoneNumber }}</p>_x000D_
        <phone-number id="homePhone"_x000D_
                      class="form-control" _x000D_
                      placeholder="Home Phone" _x000D_
                      model="user.profile.HomePhone"_x000D_
                      ng-required="!(user.profile.HomePhone.length || user.profile.BusinessPhone.length || user.profile.MobilePhone.length)" />_x000D_
</div>
_x000D_
_x000D_
_x000D_

How can I change the image of an ImageView?

Just to go a little bit further in the matter, you can also set a bitmap directly, like this:

ImageView imageView = new ImageView(this);  
Bitmap bImage = BitmapFactory.decodeResource(this.getResources(), R.drawable.my_image);
imageView.setImageBitmap(bImage);

Of course, this technique is only useful if you need to change the image.

Convert Json string to Json object in Swift 4

The problem is that you thought your jsonString is a dictionary. It's not.

It's an array of dictionaries. In raw json strings, arrays begin with [ and dictionaries begin with {.


I used your json string with below code :

let string = "[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}]"
let data = string.data(using: .utf8)!
do {
    if let jsonArray = try JSONSerialization.jsonObject(with: data, options : .allowFragments) as? [Dictionary<String,Any>]
    {
       print(jsonArray) // use the json here     
    } else {
        print("bad json")
    }
} catch let error as NSError {
    print(error)
}

and I am getting the output :

[["form_desc": <null>, "form_name": Activity 4 with Images, "canonical_name": df_SAWERQ, "form_id": 3465]]

Regexp Java for password validation

Password Requirement :

  • Password should be at least eight (8) characters in length where the system can support it.
  • Passwords must include characters from at least two (2) of these groupings: alpha, numeric, and special characters.

    ^.*(?=.{8,})(?=.*\d)(?=.*[a-zA-Z])|(?=.{8,})(?=.*\d)(?=.*[!@#$%^&])|(?=.{8,})(?=.*[a-zA-Z])(?=.*[!@#$%^&]).*$
    

I tested it and it works

Viewing full version tree in git

You can try the following:

gitk --all

You can tell gitk what to display using anything that git rev-list understands, so if you just want a few branches, you can do:

gitk master origin/master origin/experiment

... or more exotic things like:

gitk --simplify-by-decoration --all

Relative Paths in Javascript in an external file

Good question.

  • When in a CSS file, URLs will be relative to the CSS file.

  • When writing properties using JavaScript, URLs should always be relative to the page (the main resource requested).

There is no tilde functionality built-in in JS that I know of. The usual way would be to define a JavaScript variable specifying the base path:

<script type="text/javascript">

  directory_root = "http://www.example.com/resources";

</script> 

and to reference that root whenever you assign URLs dynamically.

Bootstrap 3 .col-xs-offset-* doesn't work?

// it works in bootstrap 4, there was some changes in documentation.We dont need prefix col-, just offset-lg-3 e.g.

<div class="row">
   <div class="offset-lg-3 col-lg-6"> Some content...
   </div>
</div>

// here doc: http://v4-alpha.getbootstrap.com/layout/grid/#example-offsetting-columns

How to delete a row from GridView?

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

public partial class Default3 : System.Web.UI.Page
{
   DataTable dt = new DataTable();
    DataSet Gds = new DataSet();
   // DataColumn colm1 = new DataColumn();
   //DataColumn colm2 = new DataColumn();

    protected void Page_Load(object sender, EventArgs e)
    {
        dt.Columns.Add("ExpId", typeof(int));
        dt.Columns.Add("FirstName", typeof(string));

    }


    protected void BtnLoad_Click(object sender, EventArgs e)
    {
        //   gvLoad is Grid View Id
        if (gvLoad.Rows.Count == 0)
        {
            Gds.Tables.Add(tblLoad());
        }
        else
        {
            dt = tblGridRow();
            dt.Rows.Add(tblRow());
            Gds.Tables.Add(dt);
        }
        gvLoad.DataSource = Gds;
        gvLoad.DataBind();
    }

    protected DataTable tblLoad()
    {
        dt.Rows.Add(tblRow());
        return dt;
    }
    protected DataRow tblRow()
    {
        DataRow dr;
        dr = dt.NewRow();
        dr["Exp Id"] = Convert.ToInt16(txtId.Text);
        dr["First Name"] = Convert.ToString(txtName.Text);
        return dr;
    }

    protected DataTable tblGridRow()
    {
        DataRow dr;
        for (int i = 0; i < gvLoad.Rows.Count; i++)
        {
            if (gvLoad.Rows[i].Cells[0].Text != null)
            {

                dr = dt.NewRow();
                dr["Exp Id"] = gvLoad.Rows[i].Cells[1].Text.ToString();
                dr["First Name"] = gvLoad.Rows[i].Cells[2].Text.ToString();
                dt.Rows.Add(dr);

            }

        }
        return dt;
    }

    protected void btn_Click(object sender, EventArgs e)
    {
        dt = tblGridRow();
        dt.Rows.Add(tblRow());
        Session["tab"] = dt;
        // Response.Redirect("Default.aspx");
    }

    protected void gvLoad_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        dt = tblGridRow();
        dt.Rows.RemoveAt(e.RowIndex);
        gvLoad.DataSource = dt;
        gvLoad.DataBind();
    }
}

set serveroutput on in oracle procedure

To understand the use of "SET SERVEROUTPUT ON" I will take an example

DECLARE
a number(10)  :=10;
BEGIN
dbms_output.put_line(a) ;
dbms_output.put_line('Hello World ! ')  ;
END ;

With an output : PL/SQl procedure successfully completed i.e without the expected output

And the main reason behind is that ,whatever we pass inside dbms_output.put_line(' ARGUMENT '/VALUES) i.e. ARGUMENT/VALUES , is internally stored inside a buffer in SGA(Shared Global Area ) memory area upto 2000 bytes .

*NOTE :***However one should note that this buffer is only created when we use **dbms_output package. And we need to set the environment variable only once for a session !!

And in order to fetch it from that buffer we need to set the environment variable for the session . It makes a lot of confusion to the beginners that we are setting the server output on ( because of its nomenclature ) , but unfortunately its nothing like that . Using SET SERVER OUTPUT ON are just telling the PL/SQL engine that

*Hey please print the ARGUMENT/VALUES that I will be passing inside dbms_output.put_line
and in turn PL/SQl run time engine prints the argument on the main console .

I think I am clear to you all . Wish you all the best . To know more about it with the architectural structure of Oracle Server Engine you can see my answer on Quora http://qr.ae/RojAn8

And to answer your question "One should use SET SERVER OUTPUT in the beginning of the session. "

How to edit a text file in my terminal

If you are still inside the vi editor, you might be in a different mode from the one you want. Hit ESC a couple of times (until it rings or flashes) and then "i" to enter INSERT mode or "a" to enter APPEND mode (they are the same, just start before or after current character).

If you are back at the command prompt, make sure you can locate the file, then navigate to that directory and perform the mentioned "vi helloWorld.txt". Once you are in the editor, you'll need to check the vi reference to know how to perform the editions you want (you may want to google "vi reference" or "vi cheat sheet").

Once the edition is done, hit ESC again, then type :wq to save your work or :q! to quit without saving.

For quick reference, here you have a text-based cheat sheet.

If a folder does not exist, create it

You can create the path if it doesn't exist yet with a method like the following:

using System.IO;

private void CreateIfMissing(string path)
{
  bool folderExists = Directory.Exists(Server.MapPath(path));
  if (!folderExists)
    Directory.CreateDirectory(Server.MapPath(path));
}

Why am I getting "Thread was being aborted" in ASP.NET?

I got this error when I did a Response.Redirect after a successful login of the user.

I fixed it by doing a FormsAuthentication.RedirectFromLoginPage instead.

How to achieve ripple animation using support library?

I formerly voted to close this question as off-topic but actually I changed my mind as this is quite nice visual effect which, unfortunately, is not yet part of support library. It will most likely show up in future update, but there's no time frame announced.

Luckily there are few custom implementations already available:

including Materlial themed widget sets compatible with older versions of Android:

so you can try one of these or google for other "material widgets" or so...

Default session timeout for Apache Tomcat applications

Open $CATALINA_BASE/conf/web.xml and find this

<!-- ==================== Default Session Configuration ================= -->
<!-- You can set the default session timeout (in minutes) for all newly   -->
<!-- created sessions by modifying the value below.                       -->

<session-config>
  <session-timeout>30</session-timeout>
</session-config>

all webapps implicitly inherit from this default web descriptor. You can override session-config as well as other settings defined there in your web.xml.

This is actually from my Tomcat 7 (Windows) but I think 5.5 conf is not very different

Java variable number or arguments for a method

Yes Java allows vargs in method parameter .

public class  Varargs
{
   public int add(int... numbers)
   { 
      int result = 1; 
      for(int number: numbers)
      {
         result= result+number;  
      }  return result; 
   }
}

Binding a WPF ComboBox to a custom list

I had what at first seemed to be an identical problem, but it turned out to be due to an NHibernate/WPF compatibility issue. The problem was caused by the way WPF checks for object equality. I was able to get my stuff to work by using the object ID property in the SelectedValue and SelectedValuePath properties.

<ComboBox Name="CategoryList"
          DisplayMemberPath="CategoryName"
          SelectedItem="{Binding Path=CategoryParent}"
          SelectedValue="{Binding Path=CategoryParent.ID}"
          SelectedValuePath="ID">

See the blog post from Chester, The WPF ComboBox - SelectedItem, SelectedValue, and SelectedValuePath with NHibernate, for details.

Environment variables for java installation

Java SE Development Kit 8u112 on a 64-bit Windows 7 or Windows 8

Set the following user environment variables (== environment variables of type user variables)

  • JAVA_HOME : C:\Program Files\Java\jdk1.8.0_112
  • JDK_HOME : %JAVA_HOME%
  • JRE_HOME : %JAVA_HOME%\jre
  • CLASSPATH : .;%JAVA_HOME%\lib;%JAVA_HOME%\jre\lib
  • PATH : your-unique-entries;%JAVA_HOME%\bin (make sure that the longish your-unique-entries does not contain any other references to another Java installation folder.

Note for Windows users on 64-bit systems:

Progra~1 = 'Program Files'
Progra~2 = 'Program Files(x86)'

Notice that these environment variables are derived from the "root" environment variable JAVA_HOME. This makes it easy to update your environment variables when updating the JDK. Just point JAVA_HOME to the fresh installation.

There is a blogpost explaining the rationale behind all these environment variables.

Optional recommendations

  • Add an user environment variable JAVA_TOOL_OPTIONS with value -Dfile.encoding="UTF-8". This ensures that Java (and tools such as Maven) will run with a Charset.defaultCharset() of UTF-8 (instead of the default Windows-1252). This has saved a lot of headaches when wirking with my own code and that of others, which unfortunately often assume the (sane) default encoding UTF-8.
  • When JDK is installed, it adds to the system environment variable Path an entry C:\ProgramData\Oracle\Java\javapath;. I anecdotally noticed that the links in that directory didn't get updated during an JDK installation update. So it's best to remove C:\ProgramData\Oracle\Java\javapath; from the Path system environment variable in order to have a consistent environment.

In C#, should I use string.Empty or String.Empty or "" to intitialize a string?

The compiler should make them all the same in the long run. Pick a standard so that your code will be easy to read, and stick with it.

Amazon S3 boto - how to create a folder?

There is no concept of folders or directories in S3. You can create file names like "abc/xys/uvw/123.jpg", which many S3 access tools like S3Fox show like a directory structure, but it's actually just a single file in a bucket.

Read a local text file using Javascript

Please find below the code that generates automatically the content of the txt local file and display it html. Good luck!

<html>
<head>
  <meta charset="utf-8">
  <script type="text/javascript">

  var x;
  if(navigator.appName.search('Microsoft')>-1) { x = new ActiveXObject('MSXML2.XMLHTTP'); }
  else { x = new XMLHttpRequest(); }

  function getdata() {
    x.open('get', 'data1.txt', true); 
    x.onreadystatechange= showdata;
    x.send(null);
  }

  function showdata() {
    if(x.readyState==4) {
      var el = document.getElementById('content');
      el.innerHTML = x.responseText;
    }
  }

  </script>
</head>
<body onload="getdata();showdata();">

  <div id="content"></div>

</body>
</html>

Moving from position A to position B slowly with animation

You can animate it after the fadeIn completes using the callback as shown below:

$("#Friends").fadeIn('slow',function(){
  $(this).animate({'top': '-=30px'},'slow');
});

Command-line Git on Windows

I had the same issue and resolved it by adding the /bin directory location to the PATH Environment Variable.

  1. Search for the file location where Git was installed, mine is C:\Users\(My UserName)\AppData\Local\GitHub. It may also be C:\Program Files (x86)\Git

  2. Once you have the location of Git you should see a /bin sub-folder. It may be in a PortableGit folder (mine is PortableGit_015aa71ef18c047ce8509ffb2f9e4bb0e3e73f13). Copy this path.

  3. Go to Control Panel > System > System Protection > Advanced > Environment Variables

  4. Choose PATH, click edit and paste the bin path there. If there are already any values in your PATH paste your Git path at the end separated with a semi-colon.

Now you can access Git command from CMD.

Getting value GET OR POST variable using JavaScript?

The simplest technique:

If your form action attribute is omitted, you can send a form to the same HTML file without actually using a GET HTTP access, just by using onClick on the button used for submitting the form. Then the form fields are in the elements array document.FormName.elements . Each element in that array has a value attribute containing the string the user provided (For INPUT elements). It also has id and name attributes, containing the id and/or name provided in the form child elements.

cocoapods - 'pod install' takes forever

Possible solutions:

  1. Updating Cocoa Pods may solve this issue
  2. Clean and fresh install pods again

Updating CocoaPods

Open terminal and type:

$ sudo gem update cocoapods

Reinstall Pods

Step 1

Remove all the pods from your project (tricky part):

Manually

  1. Remove all Pods records on Build Phases of your project (Marked Red)

enter image description here

  1. Remove libPods.a under Frameworks folder

enter image description here

  1. Now head to project directory and remove Podfile.lock*, **Pods folder and Workspace (Remove from Trash too).

Automatically using CocoaPods De-Integrate

Install

$ [sudo] gem install cocoapods-deintegrate

Run

$ pod deintegrate

Step 2

Here we are going through at installing the Pods again

Change your location your directory

$ cd yourprojectdirectory

Edit podfile by adding lines you need to it

$ open -a Xcode podfile 

or

$ nano podfile

FINALLY install the pod again

$ pod install

Hope this helps

Using jquery to delete all elements with a given id

The cleanest way to do it is by using html5 selectors api, specifically querySelectorAll().

var contentToRemove = document.querySelectorAll("#myid");
$(contentToRemove).remove(); 

The querySelectorAll() function returns an array of dom elements matching a specific id. Once you have assigned the returned array to a var, then you can pass it as an argument to jquery remove().

How to get ° character in a string in python?

just use \xb0 (in a string); python will convert it automatically

Iterating on a file doesn't work the second time

As the file object reads the file, it uses a pointer to keep track of where it is. If you read part of the file, then go back to it later it will pick up where you left off. If you read the whole file, and go back to the same file object, it will be like reading an empty file because the pointer is at the end of the file and there is nothing left to read. You can use file.tell() to see where in the file the pointer is and file.seek to set the pointer. For example:

>>> file = open('myfile.txt')
>>> file.tell()
0
>>> file.readline()
'one\n'
>>> file.tell()
4L
>>> file.readline()
'2\n'
>>> file.tell()
6L
>>> file.seek(4)
>>> file.readline()
'2\n'

Also, you should know that file.readlines() reads the whole file and stores it as a list. That's useful to know because you can replace:

for line in file.readlines():
    #do stuff
file.seek(0)
for line in file.readlines():
    #do more stuff

with:

lines = file.readlines()
for each_line in lines:
    #do stuff
for each_line in lines:
    #do more stuff

You can also iterate over a file, one line at a time, without holding the whole file in memory (this can be very useful for very large files) by doing:

for line in file:
    #do stuff

In Node.js, how do I "include" functions from my other files?

You need no new functions nor new modules. You simply need to execute the module you're calling if you don't want to use namespace.

in tools.js

module.exports = function() { 
    this.sum = function(a,b) { return a+b };
    this.multiply = function(a,b) { return a*b };
    //etc
}

in app.js

or in any other .js like myController.js :

instead of

var tools = require('tools.js') which force us to use a namespace and call tools like tools.sum(1,2);

we can simply call

require('tools.js')();

and then

sum(1,2);

in my case I have a file with controllers ctrls.js

module.exports = function() {
    this.Categories = require('categories.js');
}

and I can use Categories in every context as public class after require('ctrls.js')()

Java regular expression OR operator

You can just use the pipe on its own:

"string1|string2"

for example:

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));

Output:

blah, blah, string3

The main reason to use parentheses is to limit the scope of the alternatives:

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string(1|2)", "blah"));

has the same output. but if you just do this:

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|2", "blah"));

you get:

blah, stringblah, string3

because you've said "string1" or "2".

If you don't want to capture that part of the expression use ?::

String s = "string1, string2, string3";
System.out.println(s.replaceAll("string(?:1|2)", "blah"));

How to merge a list of lists with same type of items to a single list of items?

Do you mean this?

var listOfList = new List<List<int>>() {
    new List<int>() { 1, 2 },
    new List<int>() { 3, 4 },
    new List<int>() { 5, 6 }
};
var list = new List<int> { 9, 9, 9 };
var result = list.Concat(listOfList.SelectMany(x => x));

foreach (var x in result) Console.WriteLine(x);

Results in: 9 9 9 1 2 3 4 5 6

jQuery: select all elements of a given class, except for a particular Id

I'll just throw in a JS (ES6) answer, in case someone is looking for it:

Array.from(document.querySelectorAll(".myClass:not(#myId)")).forEach((el,i) => {
    doSomething(el);
}

Update (this may have been possible when I posted the original answer, but adding this now anyway):

document.querySelectorAll(".myClass:not(#myId)").forEach((el,i) => {
    doSomething(el);
});

This gets rid of the Array.from usage.

document.querySelectorAll returns a NodeList.
Read here to know more about how to iterate on it (and other things): https://developer.mozilla.org/en-US/docs/Web/API/NodeList

How do I restart nginx only after the configuration test was successful on Ubuntu?

You can reload using /etc/init.d/nginx reload and sudo service nginx reload

If nginx -t throws some error then it won't reload

so use && to run both at a same time

like

nginx -t && /etc/init.d/nginx reload

Why does ANT tell me that JAVA_HOME is wrong when it is not?

I had the same problem. My JDK package pointed by JAVA_HOME didn't have any tools.jar Be sure that your JDK instal.lation has tools.jar

(clearly the message error is confusing)

How do I declare and assign a variable on a single line in SQL

Here goes:

DECLARE @var nvarchar(max) = 'Man''s best friend';

You will note that the ' is escaped by doubling it to ''.

Since the string delimiter is ' and not ", there is no need to escape ":

DECLARE @var nvarchar(max) = '"My Name is Luca" is a great song';

The second example in the MSDN page on DECLARE shows the correct syntax.

CSS two div width 50% in one line with line break in file

Wrap them around a div with the following CSS

.div_wrapper{
    white-space: nowrap;
}

Alter MySQL table to add comments on columns

try:

 ALTER TABLE `user` CHANGE `id` `id` INT( 11 ) COMMENT 'id of user'  

How to convert PDF files to images

The NuGet package Pdf2Png is available for free and is only protected by the MIT License, which is very open.

I've tested around a bit and this is the code to get it to convert a PDF file to an image (tt does save the image in the debug folder).

using cs_pdf_to_image;
using PdfToImage;

private void BtnConvert_Click(object sender, EventArgs e)
{
    if(openFileDialog1.ShowDialog() == DialogResult.OK)
    {
        try
        {
            string PdfFile = openFileDialog1.FileName;
            string PngFile = "Convert.png";
            List<string> Conversion = cs_pdf_to_image.Pdf2Image.Convert(PdfFile, PngFile);
            Bitmap Output = new Bitmap(PngFile);
            PbConversion.Image = Output;
        }
        catch(Exception E)
        {
            MessageBox.Show(E.Message);
        }
    }
}

Remove NaN from pandas series

>>> s = pd.Series([1,2,3,4,np.NaN,5,np.NaN])
>>> s[~s.isnull()]
0    1
1    2
2    3
3    4
5    5

update or even better approach as @DSM suggested in comments, using pandas.Series.dropna():

>>> s.dropna()
0    1
1    2
2    3
3    4
5    5

Angular expression if array contains

You shouldn't overload the templates with complex logic, it's a bad practice. Remember to always keep it simple!

The better approach would be to extract this logic into reusable function on your $rootScope:

.run(function ($rootScope) {
  $rootScope.inArray = function (item, array) {
    return (-1 !== array.indexOf(item));
  };
})

Then, use it in your template:

<li ng-class="{approved: inArray(jobSet, selectedForApproval)}"></li>

I think everyone will agree that this example is much more readable and maintainable.

Spring Boot War deployed to Tomcat

After following the guide (or using Spring Initializr), I had a WAR that worked on my local computer, but didn't work remote (running on Tomcat).

There was no error message, it just said "Spring servlet initializer was found", but didn't do anything at all.

17-Aug-2016 16:58:13.552 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.5.4
17-Aug-2016 16:58:13.593 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /opt/tomcat/webapps/ROOT.war
17-Aug-2016 16:58:16.243 INFO [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

and

17-Aug-2016 16:58:16.301 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log 2 Spring WebApplicationInitializers detected on classpath
17-Aug-2016 16:58:21.471 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log Initializing Spring embedded WebApplicationContext
17-Aug-2016 16:58:25.133 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log ContextListener: contextInitialized()
17-Aug-2016 16:58:25.133 INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log SessionListener: contextInitialized()

Nothing else happened. Spring Boot just didn't run.

Apparently I compiled the server with Java 1.8, and the remote computer had Java 1.7.

After compiling with Java 1.7, it started working.

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.7</java.version> <!-- added this line -->
    <start-class>myapp.SpringApplication</start-class>
</properties>

React JS onClick event handler

Two ways I can think of are

var TestApp = React.createClass({
    getComponent: function(index) {
        $(this.getDOMNode()).find('li:nth-child(' + index + ')').css({
            'background-color': '#ccc'
        });
    },
    render: function() {
        return (
            <div>
              <ul>
                <li onClick={this.getComponent.bind(this, 1)}>Component 1</li>
                <li onClick={this.getComponent.bind(this, 2)}>Component 2</li>
                <li onClick={this.getComponent.bind(this, 3)}>Component 3</li>
              </ul>
            </div>
        );
    }
});
React.renderComponent(<TestApp /> , document.getElementById('soln1'));

This is my personal favorite.

var ListItem = React.createClass({
    getInitialState: function() {
        return {
            isSelected: false
        };
    },
    handleClick: function() {
        this.setState({
            isSelected: true
        })
    },
    render: function() {
        var isSelected = this.state.isSelected;
        var style = {
            'background-color': ''
        };
        if (isSelected) {
            style = {
                'background-color': '#ccc'
            };
        }
        return (
            <li onClick={this.handleClick} style={style}>{this.props.content}</li>
        );
    }
});

var TestApp2 = React.createClass({
    getComponent: function(index) {
        $(this.getDOMNode()).find('li:nth-child(' + index + ')').css({
            'background-color': '#ccc'
        });
    },
    render: function() {
        return (
            <div>
             <ul>
              <ListItem content="Component 1" />
              <ListItem content="Component 2" />
              <ListItem content="Component 3" />
             </ul>
            </div>
        );
    }
});
React.renderComponent(<TestApp2 /> , document.getElementById('soln2'));

Here is a DEMO

I hope this helps.

Fastest way to convert string to integer in PHP

Run a test.

   string coerce:          7.42296099663
   string cast:            8.05654597282
   string fail coerce:     7.14159703255
   string fail cast:       7.87444186211

This was a test that ran each scenario 10,000,000 times. :-)

Co-ercion is 0 + "123"

Casting is (integer)"123"

I think Co-ercion is a tiny bit faster. Oh, and trying 0 + array('123') is a fatal error in PHP. You might want your code to check the type of the supplied value.

My test code is below.


function test_string_coerce($s) {
    return 0 + $s;
}

function test_string_cast($s) {
    return (integer)$s;
}

$iter = 10000000;

print "-- running each text $iter times.\n";

// string co-erce
$string_coerce = new Timer;
$string_coerce->Start();

print "String Coerce test\n";
for( $i = 0; $i < $iter ; $i++ ) {
    test_string_coerce('123');
}

$string_coerce->Stop();

// string cast
$string_cast = new Timer;
$string_cast->Start();

print "String Cast test\n";
for( $i = 0; $i < $iter ; $i++ ) {
    test_string_cast('123');
}

$string_cast->Stop();

// string co-erce fail.
$string_coerce_fail = new Timer;
$string_coerce_fail->Start();

print "String Coerce fail test\n";
for( $i = 0; $i < $iter ; $i++ ) {
    test_string_coerce('hello');
}

$string_coerce_fail->Stop();

// string cast fail
$string_cast_fail = new Timer;
$string_cast_fail->Start();

print "String Cast fail test\n";
for( $i = 0; $i < $iter ; $i++ ) {
    test_string_cast('hello');
}

$string_cast_fail->Stop();

// -----------------
print "\n";
print "string coerce:          ".$string_coerce->Elapsed()."\n";
print "string cast:            ".$string_cast->Elapsed()."\n";
print "string fail coerce:     ".$string_coerce_fail->Elapsed()."\n";
print "string fail cast:       ".$string_cast_fail->Elapsed()."\n";


class Timer {
    var $ticking = null;
    var $started_at = false;
    var $elapsed = 0;

    function Timer() {
        $this->ticking = null;
    }

    function Start() {
        $this->ticking = true;
        $this->started_at = microtime(TRUE);
    }

    function Stop() {
        if( $this->ticking )
            $this->elapsed = microtime(TRUE) - $this->started_at;
        $this->ticking = false;
    }

    function Elapsed() {
        switch( $this->ticking ) {
            case true: return "Still Running";
            case false: return $this->elapsed;
            case null: return "Not Started";
        }
    }
}

How to do a SOAP wsdl web services call from the command line

For Windows:

Save the following as MSFT.vbs:

set SOAPClient = createobject("MSSOAP.SOAPClient")
SOAPClient.mssoapinit "https://sandbox.mediamind.com/Eyeblaster.MediaMind.API/V2/AuthenticationService.svc?wsdl"
WScript.Echo "MSFT = " & SOAPClient.GetQuote("MSFT")

Then from a command prompt, run:

C:\>MSFT.vbs

Reference: http://blogs.msdn.com/b/bgroth/archive/2004/10/21/246155.aspx

'Java' is not recognized as an internal or external command

If you have set the environment variables (JAVA_HOME and PATH) under user variables, command prompt (run as administrator) will not identify java. For that you need to set environment variables under system variables.

HTML <sup /> tag affecting line height, how to make it consistent?

I prefer the solution suggested here, as exemplified by this jsfiddle:

CSS:

sup, sub {
  vertical-align: baseline;
  position: relative;
  top: -0.2em;
}

sub {
  top: 0.2em;
}

HTML:

<span>The following equation is perhaps the most well known of all: </span><span id="box">E<sub>a</sub> = mc<sup>2</sup></span><span>.  And it gives an opportunity to try out a superscript and even throw in a superfluous subscript!  I'm sure that Einstein would be pleased.</span>.

The beauty of this solution is that you can tailor the vertical positioning of the superscript and subscript, to avoid any clashes with the line above or below... in the above, just increase or decrease the 0.2em to suit your requirements.

Export DataTable to Excel with Open Xml SDK in c#

I wrote this quick example. It works for me. I only tested it with one dataset with one table inside, but I guess that may be enough for you.

Take into consideration that I treated all cells as String (not even SharedStrings). If you want to use SharedStrings you might need to tweak my sample a bit.

Edit: To make this work it is necessary to add WindowsBase and DocumentFormat.OpenXml references to project.

Enjoy,

private void ExportDataSet(DataSet ds, string destination)
        {
            using (var workbook = SpreadsheetDocument.Create(destination, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
            {
                var workbookPart = workbook.AddWorkbookPart();

                workbook.WorkbookPart.Workbook = new DocumentFormat.OpenXml.Spreadsheet.Workbook();

                workbook.WorkbookPart.Workbook.Sheets = new DocumentFormat.OpenXml.Spreadsheet.Sheets();

                foreach (System.Data.DataTable table in ds.Tables) {

                    var sheetPart = workbook.WorkbookPart.AddNewPart<WorksheetPart>();
                    var sheetData = new DocumentFormat.OpenXml.Spreadsheet.SheetData();
                    sheetPart.Worksheet = new DocumentFormat.OpenXml.Spreadsheet.Worksheet(sheetData);

                    DocumentFormat.OpenXml.Spreadsheet.Sheets sheets = workbook.WorkbookPart.Workbook.GetFirstChild<DocumentFormat.OpenXml.Spreadsheet.Sheets>();
                    string relationshipId = workbook.WorkbookPart.GetIdOfPart(sheetPart);

                    uint sheetId = 1;
                    if (sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Count() > 0)
                    {
                        sheetId =
                            sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Select(s => s.SheetId.Value).Max() + 1;
                    }

                    DocumentFormat.OpenXml.Spreadsheet.Sheet sheet = new DocumentFormat.OpenXml.Spreadsheet.Sheet() { Id = relationshipId, SheetId = sheetId, Name = table.TableName };
                    sheets.Append(sheet);

                    DocumentFormat.OpenXml.Spreadsheet.Row headerRow = new DocumentFormat.OpenXml.Spreadsheet.Row();

                    List<String> columns = new List<string>();
                    foreach (System.Data.DataColumn column in table.Columns) {
                        columns.Add(column.ColumnName);

                        DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
                        cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
                        cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(column.ColumnName);
                        headerRow.AppendChild(cell);
                    }


                    sheetData.AppendChild(headerRow);

                    foreach (System.Data.DataRow dsrow in table.Rows)
                    {
                        DocumentFormat.OpenXml.Spreadsheet.Row newRow = new DocumentFormat.OpenXml.Spreadsheet.Row();
                        foreach (String col in columns)
                        {
                            DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
                            cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
                            cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(dsrow[col].ToString()); //
                            newRow.AppendChild(cell);
                        }

                        sheetData.AppendChild(newRow);
                    }

                }
            }
        }

What is "with (nolock)" in SQL Server?

The question is what is worse:

  • a deadlock, or
  • a wrong value?

For financial databases, deadlocks are far worse than wrong values. I know that sounds backwards, but hear me out. The traditional example of DB transactions is you update two rows, subtracting from one and adding to another. That is wrong.

In a financial database you use business transactions. That means adding one row to each account. It is of utmost importance that these transactions complete and the rows are successfully written.

Getting the account balance temporarily wrong isn't a big deal, that is what the end of day reconciliation is for. And an overdraft from an account is far more likely to occur because two ATMs are being used at once than because of a uncommitted read from a database.

That said, SQL Server 2005 fixed most of the bugs that made NOLOCK necessary. So unless you are using SQL Server 2000 or earlier, you shouldn't need it.

Further Reading
Row-Level Versioning

Calling other function in the same controller?

Try:

return $this->sendRequest($uri);

Since PHP is not a pure Object-Orieneted language, it interprets sendRequest() as an attempt to invoke a globally defined function (just like nl2br() for example), but since your function is part of a class ('InstagramController'), you need to use $this to point the interpreter in the right direction.

Lua - Current time in milliseconds

You can use C function gettimeofday : http://www.opengroup.org/onlinepubs/000095399/functions/gettimeofday.html

Here C library 'ul_time', function sec_usec resides in 'time' global table and returns seconds, useconds. Copy DLL to Lua folder, open it with require 'ul_time'.

http://depositfiles.com/files/3g2fx7dij

In Git, how do I figure out what my current revision is?

This gives you the first few digits of the hash and they are unique enough to use as say a version number.

git rev-parse --short HEAD

"Non-resolvable parent POM: Could not transfer artifact" when trying to refer to a parent pom from a child pom with ${parent.groupid}

Looks like you're trying to both inherit the groupId from the parent, and simultaneously specify the parent using an inherited groupId!

In the child pom, use something like this:

<modelVersion>4.0.0</modelVersion>

<parent>
  <groupId>org.felipe</groupId>
  <artifactId>tutorial_maven</artifactId>
  <version>1.0-SNAPSHOT</version>
  <relativePath>../pom.xml</relativePath>
</parent>

<artifactId>tutorial_maven_jar</artifactId>

Using properties like ${project.groupId} won't work there. If you specify the parent in this way, then you can inherit the groupId and version in the child pom. Hence, you only need to specify the artifactId in the child pom.

Python: TypeError: cannot concatenate 'str' and 'int' objects

str(c) returns a new string representation of c, and does not mutate c itself.

c = str(c) 

is probably what you are looking for

Angular 2 http post params and body

The 2nd parameter of http.post is the body of the message, ie the payload and not the url search parameters. Pass data in that parameter.

From the documentation

post(url: string, body: any, options?: RequestOptionsArgs) : Observable<Response>

public post(cmd: string, data: object): Observable<any> {

    const params = new URLSearchParams();
    params.set('cmd', cmd);

    const options = new RequestOptions({
      headers: this.getAuthorizedHeaders(),
      responseType: ResponseContentType.Json,
      params: params,
      withCredentials: false
    });

    console.log('Options: ' + JSON.stringify(options));

    return this.http.post(this.BASE_URL, data, options)
      .map(this.handleData)
      .catch(this.handleError);
  }

Edit

You should also check out the 1st parameter (BASE_URL). It must contain the complete url (minus query string) that you want to reach. I mention in due to the name you gave it and I can only guess what the value currently is (maybe just the domain?).

Also there is no need to call JSON.stringify on the data/payload that is sent in the http body.

If you still can't reach your end point look in the browser's network activity in the development console to see what is being sent. You can then further determine if the correct end point is being called wit the correct header and body. If it appears that is correct then use POSTMAN or Fiddler or something similar to see if you can hit your endpoint that way (outside of Angular).

Pandas group-by and sum

Also you can use agg function,

df.groupby(['Name', 'Fruit'])['Number'].agg('sum')

Select default option value from typescript angular 6

In addition to what mentioned before, you can use [attr.selected] directive to select a specific option, as follows:

<select>
    <option *ngFor="let program of programs" [attr.selected]="(member.programID == program.id)">
        {{ program.name }}
    </option>
</select>

How to get input type using jquery?

The best place to start looking is http://api.jquery.com/category/selectors/

This will give you a good set of examples.

Ultamatly the selecting of elements in the DOM is achived using CSS selectors so if you think about getting an element by id you will want to use $('#elementId'), if you want all the input tags use $('input') and finaly the part i think you'll want if you want all input tags with a type of checkbox use $('input, [type=checkbox])

Note: You'll find most of the values you want are on attributes so the css selector for attributes is: [attributeName=value]

Just because you asked for the dropdown as aposed to a listbox try the following:


$('select, [size]).each(function(){
  var selectedItem = $('select, [select]', this).first();
});

The code was from memory so please accound for small errors

"Port 4200 is already in use" when running the ng serve command

If you compiling your angular JS code in both CMD and IDE then this issue occur. In CMD, your angular JS code compile automatically whenever you change your angular JS code in IDE and then your IDE want to occupy the same port i.e 4200 which is occupied by CMD already So, there is a simple solution for this issue, just close your cmd while compiling your code in IDE.

C#: How to make pressing enter in a text box trigger a button, yet still allow shortcuts such as "Ctrl+A" to get through?

You do not need any client side code if doing this is ASP.NET. The example below is a boostrap input box with a search button with an fontawesome icon.

You will see that in place of using a regular < div > tag with a class of "input-group" I have used a asp:Panel. The DefaultButton property set to the id of my button, does the trick.

In example below, after typing something in the input textbox, you just hit enter and that will result in a submit.

<asp:Panel DefaultButton="btnblogsearch" runat="server" CssClass="input-group blogsearch">
<asp:TextBox ID="txtSearchWords" CssClass="form-control" runat="server" Width="100%" Placeholder="Search for..."></asp:TextBox>
<span class="input-group-btn">
    <asp:LinkButton ID="btnblogsearch" runat="server" CssClass="btn btn-default"><i class="fa fa-search"></i></asp:LinkButton>
</span></asp:Panel>

Use string.Contains() with switch()

switch(message)
{
  case "test":
    Console.WriteLine("yes");
    break;                
  default:
    if (Contains("test2")) {
      Console.WriteLine("yes for test2");
    }
    break;
}

Launch custom android application from android browser

Look @JRuns answer in here. The idea is to create html with your custom scheme and upload it somewhere. Then if you click on your custom link on your html-file, you will be redirected to your app. I used this article for android. But dont forget to set full name Name = "MyApp.Mobile.Droid.MainActivity" attribute to your target activity.

How to create a JPA query with LEFT OUTER JOIN

If you have entities A and B without any relation between them and there is strictly 0 or 1 B for each A, you could do:

select a, (select b from B b where b.joinProperty = a.joinProperty) from A a

This would give you an Object[]{a,b} for a single result or List<Object[]{a,b}> for multiple results.

E: Unable to locate package mongodb-org

I had the same issue in 14.04, but I fixed it by these steps:

  1. sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
  2. echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb- org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
  3. sudo apt-get update
  4. sudo apt-get install -y mongodb

It worked like charm :)

Positive Number to Negative Number in JavaScript?

num * -1

This would do it for you.

How to search a string in a single column (A) in excel using VBA

Below are two methods that are superior to looping. Both handle a "no-find" case.

  1. The VBA equivalent of a normal function VLOOKUP with error-handling if the variable doesn't exist (INDEX/MATCH may be a better route than VLOOKUP, ie if your two columns A and B were in reverse order, or were far apart)
  2. VBAs FIND method (matching a whole string in column A given I use the xlWhole argument)

    Sub Method1()
    Dim strSearch As String
    Dim strOut As String
    Dim bFailed As Boolean
    
    strSearch = "trees"
    
    On Error Resume Next
    strOut = Application.WorksheetFunction.VLookup(strSearch, Range("A:B"), 2, False)
    If Err.Number <> 0 Then bFailed = True
    On Error GoTo 0
    
    If Not bFailed Then
    MsgBox "corresponding value is " & vbNewLine & strOut
    Else
    MsgBox strSearch & " not found"
    End If
    End Sub
    
    Sub Method2()
        Dim rng1 As Range
        Dim strSearch As String
        strSearch = "trees"
        Set rng1 = Range("A:A").Find(strSearch, , xlValues, xlWhole)
        If Not rng1 Is Nothing Then
            MsgBox "Find has matched " & strSearch & vbNewLine & "corresponding cell is " & rng1.Offset(0, 1)
        Else
            MsgBox strSearch & " not found"
        End If
    End Sub
    

Twitter Bootstrap carousel different height images cause bouncing arrows

Try this (I'm using SASS):

.carousel {
  max-height: 700px;
  overflow: hidden;

  .item img {
    width: 100%;
    height: auto;
  }
}

You can wrap the .carousel into a .container if you wish.

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

You can use python3 -m pip as a synonym for pip3. That has saved me a couple of times.

Adding a directory to PATH in Ubuntu

you can set it in .bashrc

PATH=$PATH:/opt/ActiveTcl-8.5/bin;export PATH;

What is the best way to left align and right align two div tags?

As an alternative way to floating:

<style>
    .wrapper{position:relative;}
    .right,.left{width:50%; position:absolute;}
    .right{right:0;}
    .left{left:0;}
</style>
...
<div class="wrapper">
    <div class="left"></div>
    <div class="right"></div>
</div>

Considering that there's no necessity to position the .left div as absolute (depending on your direction, this could be the .right one) due to that would be in the desired position in natural flow of html code.

List all indexes on ElasticSearch server?

I use this to get all indices:

$ curl --silent 'http://127.0.0.1:9200/_cat/indices' | cut -d\  -f3

With this list you can work on...

Example

$ curl -s 'http://localhost:9200/_cat/indices' | head -5
green open qa-abcdefq_1458925279526           1 6       0     0   1008b    144b
green open qa-test_learnq_1460483735129    1 6       0     0   1008b    144b
green open qa-testimportd_1458925361399       1 6       0     0   1008b    144b
green open qa-test123p_reports                1 6 3868280 25605   5.9gb 870.5mb
green open qa-dan050216p_1462220967543        1 6       0     0   1008b    144b

To get the 3rd column above (names of the indices):

$ curl -s 'http://localhost:9200/_cat/indices' | head -5 | cut -d\  -f3
qa-abcdefq_1458925279526
qa-test_learnq_1460483735129
qa-testimportd_1458925361399
qa-test123p_reports
qa-dan050216p_1462220967543

NOTE: You can also use awk '{print $3}' instead of cut -d\ -f3.

Column Headers

You can also suffix the query with a ?v to add a column header. Doing so will break the cut... method so I'd recommend using the awk.. selection at this point.

$ curl -s 'http://localhost:9200/_cat/indices?v' | head -5
health status index                              pri rep docs.count docs.deleted store.size pri.store.size
green  open   qa-abcdefq_1458925279526             1   6          0            0      1008b           144b
green  open   qa-test_learnq_1460483735129      1   6          0            0      1008b           144b
green  open   qa-testimportd_1458925361399         1   6          0            0      1008b           144b
green  open   qa-test123p_reports                  1   6    3868280        25605      5.9gb        870.5mb

error CS0234: The type or namespace name 'Script' does not exist in the namespace 'System.Web'

I found this MSDN forum post which suggests two solutions to your problem.

First solution (not recommended):

Find the .Net Framework 3.5 and 2.0 folder

Copy System.Web.Extensions.dll from 3.5 and System.Web.dll from 2.0 to the application folder

Add the reference to these two assemblies

Change the referenced assemblies property, setting "Copy Local" to true And build to test your application to ensure all code can work

Second solution (Use a different class / library):

The user who had posted the question claimed that Uri.EscapeUriString and How to: Serialize and Deserialize JSON Data helped him replicate the behavior of JavaScriptSerializer.

You could also try to use Json.Net. It's a third party library and pretty powerful.

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

Ignoring the check results in a corrupted install. This is the only solution that worked for me:

  1. Create a C# console app with the following code: Console.WriteLine(string.Format("{0,3}", CultureInfo.InstalledUICulture.Parent.LCID.ToString("X")).Replace(" ", "0"));

  2. Run the app and get the 3 digit code.

  3. Run > Regedit, open the following path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Perflib

Now, if you don't have a folder underneath that path with the 3 digit code from step 2, create it. If you do have the folder, check that it has the "Counter" and "Help" values set under that path. It probably doesn't -- which is why the check fails.

Create the missing Counter and Help keys (REG_MULTI_SZ). For the values, copy them from the existing path above (probably 009).

The check should now pass.

How to use ArrayAdapter<myClass>

Implement custom adapter for your class:

public class MyClassAdapter extends ArrayAdapter<MyClass> {

    private static class ViewHolder {
        private TextView itemView;
    }

    public MyClassAdapter(Context context, int textViewResourceId, ArrayList<MyClass> items) {
        super(context, textViewResourceId, items);
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        if (convertView == null) {
            convertView = LayoutInflater.from(this.getContext())
            .inflate(R.layout.listview_association, parent, false);

            viewHolder = new ViewHolder();
            viewHolder.itemView = (TextView) convertView.findViewById(R.id.ItemView);

            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        MyClass item = getItem(position);
        if (item!= null) {
            // My layout has only one TextView
                // do whatever you want with your string and long
            viewHolder.itemView.setText(String.format("%s %d", item.reason, item.long_val));
        }

        return convertView;
    }
}

For those not very familiar with the Android framework, this is explained in better detail here: https://github.com/codepath/android_guides/wiki/Using-an-ArrayAdapter-with-ListView.

About .bash_profile, .bashrc, and where should alias be written in?

.bash_profile is loaded for a "login shell". I am not sure what that would be on OS X, but on Linux that is either X11 or a virtual terminal.

.bashrc is loaded every time you run Bash. That is where you should put stuff you want loaded whenever you open a new Terminal.app window.

I personally put everything in .bashrc so that I don't have to restart the application for changes to take effect.

Tool to monitor HTTP, TCP, etc. Web Service traffic

Wireshark does not do port redirection, but sniffs and interprets a lot of protocols.

How do I increase modal width in Angular UI Bootstrap?

If you want to just go with the default large size you can add 'modal-lg':

var modal = $modal.open({
          templateUrl: "/partials/welcome",
          controller: "welcomeCtrl",
          backdrop: "static",
          scope: $scope,
          windowClass: 'modal-lg'
});

How to create a jar with external libraries included in Eclipse?

To generate jar file in eclipse right click on the project for which you want to generate, Select Export>Java>Runnable Jar File,

enter image description here

enter image description here

Its create jar which includes all the dependencies from Pom.xml, But please make sure license issue if you are using third-party dependency for your application.

Python - Create list with numbers between 2 values?

If you are looking for range like function which works for float type, then here is a very good article.

def frange(start, stop, step=1.0):
    ''' "range()" like function which accept float type''' 
    i = start
    while i < stop:
        yield i
        i += step
# Generate one element at a time.
# Preferred when you don't need all generated elements at the same time. 
# This will save memory.
for i in frange(1.0, 2.0, 0.5):
    print i   # Use generated element.
# Generate all elements at once.
# Preferred when generated list ought to be small.
print list(frange(1.0, 10.0, 0.5))    

Output:

1.0
1.5
[1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5]

Sublime Text 2 multiple line edit

Windows: I prefer Alt+F3 to search a string and change all instances of search string at once.

http://www.sublimetext.com/docs/selection

How to open Console window in Eclipse?

Better to save the code first, windows -> Perspective -> close all Perspective. Then from windows -> Perspective -> open your desired perspective. Now you can all the tab which required for the perspective

Grant SELECT on multiple tables oracle

This worked for me on my Oracle database:

SELECT   'GRANT SELECT, insert, update, delete ON mySchema.' || TABLE_NAME || ' to myUser;'
FROM     user_tables
where table_name like 'myTblPrefix%'

Then, copy the results, paste them into your editor, then run them like a script.

You could also write a script and use "Execute Immediate" to run the generated SQL if you don't want the extra copy/paste steps.

How to change lowercase chars to uppercase using the 'keyup' event?

I success use this code to change uppercase

$(document).ready(function(){
$('#kode').keyup(function()
{
    $(this).val($(this).val().toUpperCase());
});
});
</script>

in your html tag bootstraps

<div class="form-group">
                            <label class="control-label col-md-3">Kode</label>
                            <div class="col-md-9 col-sm-9 col-xs-12">
                                <input name="kode" placeholder="Kode matakul" id="kode" class="form-control col-md-7 col-xs-12" type="text" required="required" maxlength="15">
                                <span class="fa fa-user form-control-feedback right" aria-hidden="true"></span>
                            </div>
                        </div>

Python: Generate random number between x and y which is a multiple of 5

If you don't want to do it all by yourself, you can use the random.randrange function.

For example import random; print random.randrange(10, 25, 5) prints a number that is between 10 and 25 (10 included, 25 excluded) and is a multiple of 5. So it would print 10, 15, or 20.

Visual Studio 2013 error MS8020 Build tools v140 cannot be found

@bku_drytt's solution didn't do it for me.

I solved it by additionally changing every occurence of 14.0 to 12.0 and v140 to v120 manually in the .vcxproj files.

Then it compiled!

Convert varchar dd/mm/yyyy to dd/mm/yyyy datetime

Try this code:

CONVERT(varchar(15), date_started, 103)

How can I start PostgreSQL server on Mac OS X?

Another approach is using the lunchy gem (a wrapper for launchctl):

brew install postgresql
initdb /usr/local/var/postgres -E utf8
gem install lunchy

To start PostgreSQL:

lunchy start postgres

To stop PostgreSQL:

lunchy stop postgres

For further information, refer to: "How to Install PostgreSQL on a Mac With Homebrew and Lunchy"

How to declare Global Variables in Excel VBA to be visible across the Workbook

Your question is: are these not modules capable of declaring variables at global scope?

Answer: YES, they are "capable"

The only point is that references to global variables in ThisWorkbook or a Sheet module have to be fully qualified (i.e., referred to as ThisWorkbook.Global1, e.g.) References to global variables in a standard module have to be fully qualified only in case of ambiguity (e.g., if there is more than one standard module defining a variable with name Global1, and you mean to use it in a third module).

For instance, place in Sheet1 code

Public glob_sh1 As String

Sub test_sh1()
    Debug.Print (glob_mod)
    Debug.Print (ThisWorkbook.glob_this)
    Debug.Print (Sheet1.glob_sh1)
End Sub

place in ThisWorkbook code

Public glob_this As String

Sub test_this()
    Debug.Print (glob_mod)
    Debug.Print (ThisWorkbook.glob_this)
    Debug.Print (Sheet1.glob_sh1)
End Sub

and in a Standard Module code

Public glob_mod As String

Sub test_mod()
    glob_mod = "glob_mod"
    ThisWorkbook.glob_this = "glob_this"
    Sheet1.glob_sh1 = "glob_sh1"
    Debug.Print (glob_mod)
    Debug.Print (ThisWorkbook.glob_this)
    Debug.Print (Sheet1.glob_sh1)
End Sub

All three subs work fine.

PS1: This answer is based essentially on info from here. It is much worth reading (from the great Chip Pearson).

PS2: Your line Debug.Print ("Hello") will give you the compile error Invalid outside procedure.

PS3: You could (partly) check your code with Debug -> Compile VBAProject in the VB editor. All compile errors will pop.

PS4: Check also Put Excel-VBA code in module or sheet?.

PS5: You might be not able to declare a global variable in, say, Sheet1, and use it in code from other workbook (reading http://msdn.microsoft.com/en-us/library/office/gg264241%28v=office.15%29.aspx#sectionSection0; I did not test this point, so this issue is yet to be confirmed as such). But you do not mean to do that in your example, anyway.

PS6: There are several cases that lead to ambiguity in case of not fully qualifying global variables. You may tinker a little to find them. They are compile errors.

Set up an HTTP proxy to insert a header

Rather than using a proxy, I'm using the Firefox plugin "Modify Headers" to insert headers (in my case, to fake a login using the Single Sign On so I can test as different people).

Jquery validation plugin - TypeError: $(...).validate is not a function

for me, the problem was from require('jquery-validation') i added in the begging of that js file which Validate method used which is necessary as an npm module

unfortunately, when web pack compiles the js files, they aren't in order, so that the validate method is before defining it! and the error comes

so better to use another js file for compiling this library or use local validate method file or even using CDN but in all cases make sure you attached jquery before

Reading content from URL with Node.js

the data object is a buffer of bytes. Simply call .toString() to get human-readable code:

console.log( data.toString() );

reference: Node.js buffers

Can't access object property, even though it shows up in a console log

I had a similar issue today in React. Eventually realised that the problem was being caused by the state not being set yet. I was calling user.user.name and although it was showing up in the console, I couldn't seem to access it in my component till I included a check to check if user.user was set and then calling user.user.name.

How to change the font size on a matplotlib plot

Here is what I generally use in Jupyter Notebook:

# Jupyter Notebook settings

from IPython.core.display import display, HTML
display(HTML("<style>.container { width:95% !important; }</style>"))
%autosave 0
%matplotlib inline
%load_ext autoreload
%autoreload 2

from IPython.core.interactiveshell import InteractiveShell
InteractiveShell.ast_node_interactivity = "all"


# Imports for data analysis
import pandas as pd
import matplotlib.pyplot as plt
pd.set_option('display.max_rows', 2500)
pd.set_option('display.max_columns', 500)
pd.set_option('display.max_colwidth', 2000)
pd.set_option('display.width', 2000)
pd.set_option('display.float_format', lambda x: '%.3f' % x)

#size=25
size=15
params = {'legend.fontsize': 'large',
          'figure.figsize': (20,8),
          'axes.labelsize': size,
          'axes.titlesize': size,
          'xtick.labelsize': size*0.75,
          'ytick.labelsize': size*0.75,
          'axes.titlepad': 25}
plt.rcParams.update(params)

Catching errors in Angular HttpClient

The worse thing is not having a decent stack trace which you simply cannot generate using an HttpInterceptor (hope to stand corrected). All you get is a load of zone and rxjs useless bloat, and not the line or class that generated the error.

To do this you will need to generate a stack in an extended HttpClient, so its not advisable to do this in a production environment.

/**
 * Extended HttpClient that generates a stack trace on error when not in a production build.
 */
@Injectable()
export class TraceHttpClient extends HttpClient {
  constructor(handler: HttpHandler) {
    super(handler);
  }

  request(...args: [any]): Observable<any> {
    const stack = environment.production ? null : Error().stack;
    return super.request(...args).pipe(
      catchError((err) => {
        // tslint:disable-next-line:no-console
        if (stack) console.error('HTTP Client error stack\n', stack);
        return throwError(err);
      })
    );
  }
}

Test credit card numbers for use with PayPal sandbox

In case anyone else comes across this in a search for an answer...

The test numbers listed in various places no longer work in the Sandbox. PayPal have the same checks in place now so that a card cannot be linked to more than one account.

Go here and get a number generated. Use any expiry date and CVV

https://ppmts.custhelp.com/app/answers/detail/a_id/750/

It's worked every time for me so far...

git cherry-pick says "...38c74d is a merge but no -m option was given"

Simplification of @Daira Hopwood method good for picking one single commit. Need no temporary branches.

In the case of the author:

  • Z is wanted commit (fd9f578)
  • Y is commit before it
  • X current working branch

then do:

git checkout Z   # move HEAD to wanted commit
git reset Y      # have Z as changes in working tree
git stash        # save Z in stash
git checkout X   # return to working branch
git stash pop    # apply Z to current branch
git commit -a    # do commit

'cl' is not recognized as an internal or external command,

For me, this was related to the scenario described by Smi, with the difference being that vcvarsall.bat itself was failing due to an invalid path.

This was cause by line-breaks within the path, which meant vcvarsall.bat couldn't find the common tools directory for some reason.

How to do a GitHub pull request

In order to make a pull request you need to do the following steps:

  1. Fork a repository (to which you want to make a pull request). Just click the fork button the the repository page and you will have a separate github repository preceded with your github username.
  2. Clone the repository to your local machine. The Github software that you installed on your local machine can do this for you. Click the clone button beside the repository name.
  3. Make local changes/commits to the files
  4. sync the changes
  5. go to your github forked repository and click the "Compare & Review" green button besides the branch button. (The button has icon - no text)
  6. A new page will open showing your changes and then click the pull request link, that will send the request to the original owner of the repository you forked.

It took me a while to figure this, hope this will help someone.

Should URL be case sensitive?

the question is should the url be case sensitive?

I see no use, or good practice behind case sensitive URL's. It stupid, it sucks and should be avoided at all times.

Just to back up my opinion, when someone asks what URL, how could you explain what characters of the URL are Upper or Lower case? That's nonsense and should no one ever tell you otherwise.

How do you round to 1 decimal place in Javascript?

var num = 34.7654;

num = Math.round(num * 10) / 10;

console.log(num); // Logs: 34.8

SQL select only rows with max value on a column

Another manner to do the job is using MAX() analytic function in OVER PARTITION clause

SELECT t.*
  FROM
    (
    SELECT id
          ,rev
          ,contents
          ,MAX(rev) OVER (PARTITION BY id) as max_rev
      FROM YourTable
    ) t
  WHERE t.rev = t.max_rev 

The other ROW_NUMBER() OVER PARTITION solution already documented in this post is

SELECT t.*
  FROM
    (
    SELECT id
          ,rev
          ,contents
          ,ROW_NUMBER() OVER (PARTITION BY id ORDER BY rev DESC) rank
      FROM YourTable
    ) t
  WHERE t.rank = 1 

This 2 SELECT work well on Oracle 10g.

MAX() solution runs certainly FASTER that ROW_NUMBER() solution because MAX() complexity is O(n) while ROW_NUMBER() complexity is at minimum O(n.log(n)) where n represent the number of records in table !

Sort hash by key, return hash in Ruby

Sort hash by key, return hash in Ruby

With destructuring and Hash#sort

hash.sort { |(ak, _), (bk, _)| ak <=> bk }.to_h

Enumerable#sort_by

hash.sort_by { |k, v| k }.to_h

Hash#sort with default behaviour

h = { "b" => 2, "c" => 1, "a" => 3  }
h.sort         # e.g. ["a", 20] <=> ["b", 30]
hash.sort.to_h #=> { "a" => 3, "b" => 2, "c" => 1 }

Note: < Ruby 2.1

array = [["key", "value"]] 
hash  = Hash[array]
hash #=> {"key"=>"value"}

Note: > Ruby 2.1

[["key", "value"]].to_h #=> {"key"=>"value"}

How to install Python MySQLdb module using pip?

I tried all the option but was not able to get it working on Redhat platform. I did the following to make it work:-

yum install MySQL-python -y

Once the package was installed was able to import module as follows in the interpreter:-

>>> import MySQLdb
>>> 

What is the documents directory (NSDocumentDirectory)?

You can access documents directory using this code it is basically used for storing file in plist format:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths firstObject];
return documentsDirectory;

Check if something is (not) in a list in Python

The bug is probably somewhere else in your code, because it should work fine:

>>> 3 not in [2, 3, 4]
False
>>> 3 not in [4, 5, 6]
True

Or with tuples:

>>> (2, 3) not in [(2, 3), (5, 6), (9, 1)]
False
>>> (2, 3) not in [(2, 7), (7, 3), "hi"]
True

Does Python's time.time() return the local or UTC timestamp?

I eventually settled for:

>>> import time
>>> time.mktime(time.gmtime())
1509467455.0

How to exclude a directory in find . command

For a working solution (tested on Ubuntu 12.04 (Precise Pangolin))...

find ! -path "dir1" -iname "*.mp3"

will search for MP3 files in the current folder and subfolders except in dir1 subfolder.

Use:

find ! -path "dir1" ! -path "dir2" -iname "*.mp3"

...to exclude dir1 AND dir2

Closing Application with Exit button

this.close_Button = (Button)this.findViewById(R.id.close);
   this.close_Button.setOnClickListener(new OnClickListener() {
     @Override
     public void onClick(View v) {
        finish();
     }
  });

finish() - Call this when your activity is done and should be closed. The ActivityResult is propagated back to whoever launched you via onActivityResult().

Get element from within an iFrame

Below code will help you to find out iframe data.

let iframe = document.getElementById('frameId');
let innerDoc = iframe.contentDocument || iframe.contentWindow.document;

How to build minified and uncompressed bundle with webpack?

To add another answer, the flag -p (short for --optimize-minimize) will enable the UglifyJS with default arguments.

You won't get a minified and raw bundle out of a single run or generate differently named bundles so the -p flag may not meet your use case.

Conversely the -d option is short for --debug --devtool sourcemap --output-pathinfo

My webpack.config.js omits devtool, debug, pathinfo, and the minmize plugin in favor of these two flags.

How to Detect cause of 503 Service Temporarily Unavailable error and handle it?

There is of course some apache log files. Search in your apache configuration files for 'Log' keyword, you'll certainly find plenty of them. Depending on your OS and installation places may vary (in a Typical Linux server it would be /var/log/apache2/[access|error].log).

Having a 503 error in Apache usually means the proxied page/service is not available. I assume you're using tomcat and that means tomcat is either not responding to apache (timeout?) or not even available (down? crashed?). So chances are that it's a configuration error in the way to connect apache and tomcat or an application inside tomcat that is not even sending a response for apache.

Sometimes, in production servers, it can as well be that you get too much traffic for the tomcat server, apache handle more request than the proxyied service (tomcat) can accept so the backend became unavailable.

Hibernate Criteria Join with 3 Tables

The fetch mode only says that the association must be fetched. If you want to add restrictions on an associated entity, you must create an alias, or a subcriteria. I generally prefer using aliases, but YMMV:

Criteria c = session.createCriteria(Dokument.class, "dokument");
c.createAlias("dokument.role", "role"); // inner join by default
c.createAlias("role.contact", "contact");
c.add(Restrictions.eq("contact.lastName", "Test"));
return c.list();

This is of course well explained in the Hibernate reference manual, and the javadoc for Criteria even has examples. Read the documentation: it has plenty of useful information.

How to run a C# console application with the console hidden

If you wrote the console application you can make it hidden by default.

Create a new console app then then change the "Output Type" type to "Windows Application" (done in the project properties)

CS0234: Mvc does not exist in the System.Web namespace

This problem can happen when you deploy your web application to a server, so you must check if you already installed MVC3.

Check if the folder C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 3 exists.

If it doesn't exist, you need to install it from http://www.microsoft.com/en-us/download/details.aspx?id=1491


If you wont to install you can add all DLLs locally in bin folder and add references to them this work fine if you host on server don't deploy ASP.NET Web Pages or MVC3.

Should I use JSLint or JSHint JavaScript validation?

tl;dr takeaway:

If you're looking for a very high standard for yourself or team, JSLint. But its not necessarily THE standard, just A standard, some of which comes to us dogmatically from a javascript god named Doug Crockford. If you want to be a bit more flexible, or have some old pros on your team that don't buy into JSLint's opinions, or are going back and forth between JS and other C-family languages on a regular basis, try JSHint.

long version:

The reasoning behind the fork explains pretty well why JSHint exists:

http://badassjs.com/post/3364925033/jshint-an-community-driven-fork-of-jslint http://anton.kovalyov.net/2011/02/20/why-i-forked-jslint-to-jshint/

So I guess the idea is that it's "community-driven" rather than Crockford-driven. In practicality, JSHint is generally a bit more lenient (or at least configurable or agnostic) on a few stylistic and minor syntactical "opinions" that JSLint is a stickler on.

As an example, if you think both the A and B below are fine, or if you want to write code with one or more of the aspects of A that aren't available in B, JSHint is for you. If you think B is the only correct option... JSLint. I'm sure there are other differences, but this highlights a few.

A) Passes JSHint out of the box - fails JSLint

(function() {
  "use strict";
  var x=0, y=2;
  function add(val1, val2){
    return val1 + val2;
  }
  var z;
  for (var i=0; i<2; i++){
    z = add(y, x+i);
  }
})();

B) Passes Both JSHint and JSLint

(function () {
    "use strict";
    var x = 0, y = 2, i, z;
    function add(val1, val2) {
       return val1 + val2;
    }
    for (i = 0; i < 2; i += 1) {
        z = add(y, x + i);
    }
}());

Personally I find JSLint code very nice to look at, and the only hard features of it that I disagree with are its hatred of more than one var declaration in a function and of for-loop var i = 0 declarations, and some of the whitespace enforcements for function declarations.

A few of the whitespace things that JSLint enforces, I find to be not necessarily bad, but out of sync with some pretty standard whitespace conventions for other languages in the family (C, Java, Python, etc...), which are often followed as conventions in Javascript as well. Since I'm writing in various of these languages throughout the day, and working with team members who don't like Lint-style whitespace in our code, I find JSHint to be a good balance. It catches stuff that's a legitimate bug or really bad form, but doesn't bark at me like JSLint does (sometimes, in ways I can't disable) for the stylistic opinions or syntactic nitpicks that I don't care for.

A lot of good libraries aren't Lint'able, which to me demonstrates that there's some truth to the idea that some of JSLint is simply just about pushing 1 version of "good code" (which is, indeed, good code). But then again, the same libraries (or other good ones) probably aren't Hint'able either, so, touché.

sql: check if entry in table A exists in table B

The classical answer that works in almost every environment is

SELECT ID, Name, blah, blah
FROM TableB TB
LEFT JOIN TableA TA
ON TB.ID=TA.ID
WHERE TA.ID IS NULL

sometimes NOT EXISTS may be not implemented (not working).

How can I run Tensorboard on a remote server?

You can port-forward with another ssh command that need not be tied to how you are connecting to the server (as an alternative to the other answer). Thus, the ordering of the below steps is arbitrary.

  1. from your local machine, run

    ssh -N -f -L localhost:16006:localhost:6006 <user@remote>

  2. on the remote machine, run:

    tensorboard --logdir <path> --port 6006

  3. Then, navigate to (in this example) http://localhost:16006 on your local machine.

(explanation of ssh command:

-N : no remote commands

-f : put ssh in the background

-L <machine1>:<portA>:<machine2>:<portB> :

forward <machine1>:<portA> (local scope) to <machine2>:<portB> (remote scope)

Find a value in an array of objects in Javascript

Either use a simple for-loop:

var result = null;
for (var i = 0; i < array.length; i++) { 
  if (array[i].name === "string 1") { 
    result = array[i];
    break;
  } 
}

Or if you can, that is, if your browser supports it, use Array.filter, which is much more terse:

var result = array.filter(function (obj) {
  return obj.name === "string 1";
})[0];

Attach (open) mdf file database with SQL Server Management Studio

You may need to repair your mdf file first using some tools. There are lot of tool available in the market. There is tool called SQL Database Recovery Tool Repairs which is very useful to repair the mdf files.

The issue might me because of corrupted transaction logs, you may use tool SQL Database Recovery Tool Repairs to repair your corrupted mdf file.

Best way to compare 2 XML documents in Java

Building on Tom's answer, here's an example using XMLUnit v2.

It uses these maven dependencies

    <dependency>
        <groupId>org.xmlunit</groupId>
        <artifactId>xmlunit-core</artifactId>
        <version>2.0.0</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.xmlunit</groupId>
        <artifactId>xmlunit-matchers</artifactId>
        <version>2.0.0</version>
        <scope>test</scope>
    </dependency>

..and here's the test code

import static org.junit.Assert.assertThat;
import static org.xmlunit.matchers.CompareMatcher.isIdenticalTo;
import org.xmlunit.builder.Input;
import org.xmlunit.input.WhitespaceStrippedSource;

public class SomeTest extends XMLTestCase {
    @Test
    public void test() {
        String result = "<root></root>";
        String expected = "<root>  </root>";

        // ignore whitespace differences
        // https://github.com/xmlunit/user-guide/wiki/Providing-Input-to-XMLUnit#whitespacestrippedsource
        assertThat(result, isIdenticalTo(new WhitespaceStrippedSource(Input.from(expected).build())));

        assertThat(result, isIdenticalTo(Input.from(expected).build())); // will fail due to whitespace differences
    }
}

The documentation that outlines this is https://github.com/xmlunit/xmlunit#comparing-two-documents

SQL Server - after insert trigger - update another column in the same table

Another option would be to enclose the update statement in an IF statement and call TRIGGER_NESTLEVEL() to restrict the update being run a second time.

CREATE TRIGGER Table_A_Update ON Table_A AFTER UPDATE 
AS
IF ((SELECT TRIGGER_NESTLEVEL()) < 2)
BEGIN
    UPDATE a
    SET Date_Column = GETDATE()
    FROM Table_A a
    JOIN inserted i ON a.ID = i.ID
END

When the trigger initially runs the TRIGGER_NESTLEVEL is set to 1 so the update statement will be executed. That update statement will in turn fire that same trigger except this time the TRIGGER_NESTLEVEL is set to 2 and the update statement will not be executed.

You could also check the TRIGGER_NESTLEVEL first and if its greater than 1 then call RETURN to exit out of the trigger.

IF ((SELECT TRIGGER_NESTLEVEL()) > 1) RETURN;

Begin, Rescue and Ensure in Ruby?

FYI, even if an exception is re-raised in the rescue section, the ensure block will be executed before the code execution continues to the next exception handler. For instance:

begin
  raise "Error!!"
rescue
  puts "test1"
  raise # Reraise exception
ensure
  puts "Ensure block"
end

Hide vertical scrollbar in <select> element

Like Guffa said, you cannot reliably get that much control over native controls. The best way is probably to make a box of elements with radio buttons beside each item, then use labels and JavaScript to make the 'rows' interactive, so clicking on a radio button or label will color the selected row.

How to display count of notifications in app launcher icon

It works in samsung touchwiz launcher

public static void setBadge(Context context, int count) {
    String launcherClassName = getLauncherClassName(context);
    if (launcherClassName == null) {
        return;
    }
    Intent intent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
    intent.putExtra("badge_count", count);
    intent.putExtra("badge_count_package_name", context.getPackageName());
    intent.putExtra("badge_count_class_name", launcherClassName);
    context.sendBroadcast(intent);
}

public static String getLauncherClassName(Context context) {

    PackageManager pm = context.getPackageManager();

    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);

    List<ResolveInfo> resolveInfos = pm.queryIntentActivities(intent, 0);
    for (ResolveInfo resolveInfo : resolveInfos) {
        String pkgName = resolveInfo.activityInfo.applicationInfo.packageName;
        if (pkgName.equalsIgnoreCase(context.getPackageName())) {
            String className = resolveInfo.activityInfo.name;
            return className;
        }
    }
    return null;
}

c++ bool question

Yes that is correct. "Boolean variables only have two possible values: true (1) and false (0)." cpp tutorial on boolean values

how to force maven to update local repo

try using -U (aka --update-snapshots) when you run maven

And make sure the dependency definition is correct

Aliases in Windows command prompt

Also, you can create an alias.cmd in your path (for example C:\Windows) with the command

@echo %2 %3 %4 %5 %6 > %windir%\%1.cmd

Once you do that, you can do something like this:

alias nameOfYourAlias commands to run 

And after that you can type in comman line

nameOfYourAlias 

this will execute

commands to run 

BUT the best way for me is just adding the path of a programm.

setx PATH "%PATH%;%ProgramFiles%\Sublime Text 3" /M 

And now I run sublime as

subl index.html

How to use SortedMap interface in Java?

A TreeMap is probably the most straightforward way of doing this. You use it exactly like a normal Map. i.e.

Map<Float,String> mySortedMap = new TreeMap<Float,MyObject>();
// Put some values in it
mySortedMap.put(1.0f,"One");
mySortedMap.put(0.0f,"Zero");
mySortedMap.put(3.0f,"Three");

// Iterate through it and it'll be in order!
for(Map.Entry<Float,String> entry : mySortedMap.entrySet()) {
    System.out.println(entry.getValue());
} // outputs Zero One Three 

It's worth taking a look at the API docs, http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html to see what else you can do with it.

How to configure Chrome's Java plugin so it uses an existing JDK in the machine

I came across a similar issue but instead of changing the regedit I decided to change the Chrome settings

Try the following steps

  1. In the chrome browser type: chrome://plugins/
  2. Click on + Details (top right corner) to expand all the plugin details.
  3. Find Java and click on Disable for the path(s) that you don't want to be used.

You might have to restart the browser to see the changes. This also assumes that the Java that you have enabled is the latest Java.

Hope this helps

What is the most effective way to get the index of an iterator of an std::vector?

If you are already restricted/hardcoded your algorithm to using a std::vector::iterator and std::vector::iterator only, it doesn't really matter which method you will end up using. Your algorithm is already concretized beyond the point where choosing one of the other can make any difference. They both do exactly the same thing. It is just a matter of personal preference. I would personally use explicit subtraction.

If, on the other hand, you want to retain a higher degree of generality in your algorithm, namely, to allow the possibility that some day in the future it might be applied to some other iterator type, then the best method depends on your intent. It depends on how restrictive you want to be with regard to the iterator type that can be used here.

  • If you use the explicit subtraction, your algorithm will be restricted to a rather narrow class of iterators: random-access iterators. (This is what you get now from std::vector)

  • If you use distance, your algorithm will support a much wider class of iterators: input iterators.

Of course, calculating distance for non-random-access iterators is in general case an inefficient operation (while, again, for random-access ones it is as efficient as subtraction). It is up to you to decide whether your algorithm makes sense for non-random-access iterators, efficiency-wise. It the resultant loss in efficiency is devastating to the point of making your algorithm completely useless, then you should better stick to subtraction, thus prohibiting the inefficient uses and forcing the user to seek alternative solutions for other iterator types. If the efficiency with non-random-access iterators is still in usable range, then you should use distance and document the fact that the algorithm works better with random-access iterators.

What does void* mean and how to use it?

The function takes a pointer to an arbitrary type and returns one such.

Add data dynamically to an Array

In additon to directly accessing the array, there is also

array_push — Push one or more elements onto the end of array

'dict' object has no attribute 'has_key'

In python3, has_key(key) is replaced by __contains__(key)

Tested in python3.7:

a = {'a':1, 'b':2, 'c':3}
print(a.__contains__('a'))

How to write an inline IF statement in JavaScript?

I often need to run more code per condition, by using: ( , , ) multiple code elements can execute:

var a = 2;
var b = 3;
var c = 0;

( a < b ?  ( alert('hi'), a=3, b=2, c=a*b ) : ( alert('by'), a=4, b=10, c=a/b ) );

How to measure time taken by a function to execute

As previously stated check for and use built in timer. But if you want or need to write your own here is my two cents:

//=-=|Source|=-=//
/**
 * JavaScript Timer Object
 *
 *      var now=timer['elapsed'](); 
 *      timer['stop']();
 *      timer['start']();
 *      timer['reset']();
 * 
 * @expose
 * @method timer
 * @return {number}
 */
timer=function(){
    var a=Date.now();
    b=0;
    return{
        /** @expose */
        elapsed:function(){return b=Date.now()-a},
        start:function(){return a=Date.now()},
        stop:function(){return Date.now()},
        reset:function(){return a=0}
    }
}();

//=-=|Google Advanced Optimized|=-=//
timer=function(){var a=Date.now();b=0;return{a:function(){return b=Date.now()-a},start:function(){return a=Date.now()},stop:function(){return Date.now()},reset:function(){return a=0}}}();

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Calculate mean and standard deviation from a vector of samples in C++ using Boost

It seems the following elegant recursive solution has not been mentioned, although it has been around for a long time. Referring to Knuth's Art of Computer Programming,

mean_1 = x_1, variance_1 = 0;            //initial conditions; edge case;

//for k >= 2, 
mean_k     = mean_k-1 + (x_k - mean_k-1) / k;
variance_k = variance_k-1 + (x_k - mean_k-1) * (x_k - mean_k);

then for a list of n>=2 values, the estimate of the standard deviation is:

stddev = std::sqrt(variance_n / (n-1)). 

Hope this helps!

Exit codes in Python

From the documentation for sys.exit:

The optional argument arg can be an integer giving the exit status (defaulting to zero), or another type of object. If it is an integer, zero is considered “successful termination” and any nonzero value is considered “abnormal termination” by shells and the like. Most systems require it to be in the range 0-127, and produce undefined results otherwise. Some systems have a convention for assigning specific meanings to specific exit codes, but these are generally underdeveloped; Unix programs generally use 2 for command line syntax errors and 1 for all other kind of errors.

One example where exit codes are used are in shell scripts. In Bash you can check the special variable $? for the last exit status:

me@mini:~$ python -c ""; echo $?
0
me@mini:~$ python -c "import sys; sys.exit(0)"; echo $?
0
me@mini:~$ python -c "import sys; sys.exit(43)"; echo $?
43

Personally I try to use the exit codes I find in /usr/include/asm-generic/errno.h (on a Linux system), but I don't know if this is the right thing to do.

How to redirect 404 errors to a page in ExpressJS?

app.get('*',function(req,res){
 res.redirect('/login');
});

How do I escape only single quotes?

To replace only single quotes, use this simple statement:

$string = str_replace("'", "\\'", $string);

String concatenation in Jinja

If you can't just use filter join but need to perform some operations on the array's entry:

{% for entry in array %}
User {{ entry.attribute1 }} has id {{ entry.attribute2 }}
{% if not loop.last %}, {% endif %}
{% endfor %}

How can I enable MySQL's slow query log without restarting MySQL?

For slow queries on version < 5.1, the following configuration worked for me:

log_slow_queries=/var/log/mysql/slow-query.log
long_query_time=20
log_queries_not_using_indexes=YES

Also note to place it under [mysqld] part of the config file and restart mysqld.

Adding content to a linear layout dynamically?

I found more accurate way to adding views like linear layouts in kotlin (Pass parent layout in inflate() and false)

val parentLayout = view.findViewById<LinearLayout>(R.id.llRecipientParent)
val childView = layoutInflater.inflate(R.layout.layout_recipient, parentLayout, false)
parentLayout.addView(childView)

How do I remove leading whitespace in Python?

The question doesn't address multiline strings, but here is how you would strip leading whitespace from a multiline string using python's standard library textwrap module. If we had a string like:

s = """
    line 1 has 4 leading spaces
    line 2 has 4 leading spaces
    line 3 has 4 leading spaces
"""

if we print(s) we would get output like:

>>> print(s)
    this has 4 leading spaces 1
    this has 4 leading spaces 2
    this has 4 leading spaces 3

and if we used textwrap.dedent:

>>> import textwrap
>>> print(textwrap.dedent(s))
this has 4 leading spaces 1
this has 4 leading spaces 2
this has 4 leading spaces 3

How to access global js variable in AngularJS directive

Copy the global variable to a variable in the scope in your controller.

function MyCtrl($scope) {
   $scope.variable1 = variable1;
}

Then you can just access it like you tried. But note that this variable will not change when you change the global variable. If you need that, you could instead use a global object and "copy" that. As it will be "copied" by reference, it will be the same object and thus changes will be applied (but remember that doing stuff outside of AngularJS will require you to do $scope.$apply anway).

But maybe it would be worthwhile if you would describe what you actually try to achieve. Because using a global variable like this is almost never a good idea and there is probably a better way to get to your intended result.

Adding images to an HTML document with javascript

or you can just

<script> 
document.write('<img src="/*picture_location_(you can just copy the picture and paste   it into the script)*\"')
document.getElementById('pic')
</script>
<div id="pic">
</div>

How to stop default link click behavior with jQuery

e.preventDefault();

from https://developer.mozilla.org/en-US/docs/Web/API/event.preventDefault

Cancels the event if it is cancelable, without stopping further propagation of the event.

How to print SQL statement in codeigniter model

After trying without success to use _compiled_select() or get_compiled_select() I just printed the db object, and you can see the query there in the queries property.

Try it yourself:

var_dump( $this->db );

If you know you have only one query, you can print it directly:

echo $this->db->queries[0];

Is there a way to take a screenshot using Java and save it to some sort of image?

public void captureScreen(String fileName) throws Exception {
   Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
   Rectangle screenRectangle = new Rectangle(screenSize);
   Robot robot = new Robot();
   BufferedImage image = robot.createScreenCapture(screenRectangle);
   ImageIO.write(image, "png", new File(fileName));
}

Add element to a JSON file?

alternatively you can do

iter(data).next()['f'] = var

How to convert strings into integers in Python?

I want to share an available option that doesn't seem to be mentioned here yet:

rumpy.random.permutation(x)

Will generate a random permutation of array x. Not exactly what you asked for, but it is a potential solution to similar questions.

How to set default vim colorscheme

You can just use the one-liner

echo colorscheme koehler >> ~/.vimrc

and replace koehler with any other available colorscheme. Imho, all of them are better than default.

What does operator "dot" (.) mean?

The dot itself is not an operator, .^ is.

The .^ is a pointwise¹ (i.e. element-wise) power, as .* is the pointwise product.

.^ Array power. A.^B is the matrix with elements A(i,j) to the B(i,j) power. The sizes of A and B must be the same or be compatible.

C.f.

¹) Hence the dot.

How to split a delimited string in Ruby and convert it to an array?

For String Integer without space as String

arr = "12345"

arr.split('')

output: ["1","2","3","4","5"]

For String Integer with space as String

arr = "1 2 3 4 5"

arr.split(' ')

output: ["1","2","3","4","5"]

For String Integer without space as Integer

arr = "12345"

arr.split('').map(&:to_i)

output: [1,2,3,4,5]

For String

arr = "abc"

arr.split('')

output: ["a","b","c"]

Explanation:

  1. arr -> string which you're going to perform any action.
  2. split() -> is an method, which split the input and store it as array.
  3. '' or ' ' or ',' -> is an value, which is needed to be removed from given string.

"git checkout <commit id>" is changing branch to "no branch"

By checking out to one of the commits in the history you are moving your git into so called 'detached state', which looks like is not what you want. Use this single command to create a new branch on one of the commits from the history:

git checkout -b <new_branch_name> <SHA1>

What is the difference between <jsp:include page = ... > and <%@ include file = ... >?

In one reusable piece of code I use the directive <%@include file="reuse.html"%> and in the second I use the standard action <jsp:include page="reuse.html" />.

Let the code in the reusable file be:

<html>
<head>
    <title>reusable</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
    <img src="candle.gif" height="100" width="50"/> <br />
    <p><b>As the candle burns,so do I</b></p>
</body>

After running both the JSP files you see the same output and think if there was any difference between the directive and the action tag. But if you look at the generated servlet of the two JSP files, you will see the difference.

Here is what you will see when you use the directive:

out.write("<html>\r\n");
out.write("    <head>\r\n");
out.write("        <title>reusable</title>\r\n");
out.write("        <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\r\n");
out.write("    </head>\r\n");
out.write("    <body>\r\n");
out.write("        <img src=\"candle.gif\" height=\"100\" width=\"50\"/> <br />\r\n");
out.write("        <p><b>As the candle burns,so do I</b></p>\r\n");
out.write("    </body>\r\n");
out.write("</html>\r\n");
 

And this is what you will see for the used standard action in the second JSP file :

org.apache.jasper.runtime.JspRuntimeLibrary.include(request, response, "reusable.html", out, false);

So now you know that the include directive inserts the source of reuse.html at translation time, but the action tag inserts the response of reuse.html at runtime.

If you think about it, there is an extra performance hit with every action tag (<jsp:include>). It means you can guarantee you will always have the latest content, but it increases performance cost.

Why doesn't os.path.join() work in this case?

The idea of os.path.join() is to make your program cross-platform (linux/windows/etc).

Even one slash ruins it.

So it only makes sense when being used with some kind of a reference point like os.environ['HOME'] or os.path.dirname(__file__).

AttributeError: 'module' object has no attribute 'urlopen'

This works in Python 2.x.

For Python 3 look in the docs:

import urllib.request

with urllib.request.urlopen("http://www.python.org") as url:
    s = url.read()
    # I'm guessing this would output the html source code ?
    print(s)

Regex to match any character including new lines

You want to use "multiline".

$string =~ /(START)(.+?)(END)/m;