Pandas group-by and sum

A variation on the .agg() function; provides the ability to (1) persist type DataFrame, (2) apply averages, counts, summations, etc. and (3) enables groupby on multiple columns while maintaining legibility.

df.groupby(['att1', 'att2']).agg({'att1': "count", 'att3': "sum",'att4': 'mean'})

using your values...

df.groupby(['Name', 'Fruit']).agg({'Number': "sum"})

Storing and Retrieving ArrayList values from hashmap

You could try using MultiMap instead of HashMap

Initialising it will require fewer lines of codes. Adding and retrieving the values will also make it shorter.

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

would become:

Multimap<String, Integer> multiMap = ArrayListMultimap.create();

You can check this link: http://java.dzone.com/articles/hashmap-%E2%80%93-single-key-and

Check if an array contains any element of another array in JavaScript

It can be done by simply iterating across the main array and check whether other array contains any of the target element or not.

Try this:

function Check(A) {
    var myarr = ["apple", "banana", "orange"];
    var i, j;
    var totalmatches = 0;
    for (i = 0; i < myarr.length; i++) {
        for (j = 0; j < A.length; ++j) {
            if (myarr[i] == A[j]) {

                totalmatches++;

            }

        }
    }
    if (totalmatches > 0) {
        return true;
    } else {
        return false;
    }
}
var fruits1 = new Array("apple", "grape");
alert(Check(fruits1));

var fruits2 = new Array("apple", "banana", "pineapple");
alert(Check(fruits2));

var fruits3 = new Array("grape", "pineapple");
alert(Check(fruits3));

DEMO at JSFIDDLE

Change Text Color of Selected Option in a Select Box

<html>
  <style>
.selectBox{
 color:White;
}
.optionBox{
  color:black;
}

</style>
<body>
<select class = "selectBox">
  <option class = "optionBox">One</option>
  <option class = "optionBox">Two</option>
  <option class = "optionBox">Three</option>
</select>

Random element from string array

Just store the index generated in a variable, and then access the array using this varaible:

int idx = new Random().nextInt(fruits.length);
String random = (fruits[idx]);

P.S. I usually don't like generating new Random object per randoization - I prefer using a single Random in the program - and re-use it. It allows me to easily reproduce a problematic sequence if I later find any bug in the program.

According to this approach, I will have some variable Random r somewhere, and I will just use:

int idx = r.nextInt(fruits.length)

However, your approach is OK as well, but you might have hard time reproducing a specific sequence if you need to later on.

How to grep for contents after pattern?

Modern BASH has support for regular expressions:

while read -r line; do
  if [[ $line =~ ^potato:\ ([0-9]+) ]]; then
    echo "${BASH_REMATCH[1]}"
  fi
done

How to perform a real time search and filter on a HTML table

you can use native javascript like this

_x000D_

<script>_x000D_
function myFunction() {_x000D_
  var input, filter, table, tr, td, i;_x000D_
  input = document.getElementById("myInput");_x000D_
  filter = input.value.toUpperCase();_x000D_
  table = document.getElementById("myTable");_x000D_
  tr = table.getElementsByTagName("tr");_x000D_
  for (i = 0; i < tr.length; i++) {_x000D_
    td = tr[i].getElementsByTagName("td")[0];_x000D_
    if (td) {_x000D_
      if (td.innerHTML.toUpperCase().indexOf(filter) > -1) {_x000D_
        tr[i].style.display = "";_x000D_
      } else {_x000D_
        tr[i].style.display = "none";_x000D_
      }_x000D_
    }       _x000D_
  }_x000D_
}_x000D_
</script>

_x000D_

How to remove all elements in String array in java?

example = new String[example.length];

If you need dynamic collection, you should consider using one of java.util.Collection implementations that fits your problem. E.g. java.util.List.

Accessing elements of Python dictionary by index

As a bonus, I'd like to offer kind of a different solution to your issue. You seem to be dealing with nested dictionaries, which is usually tedious, especially when you have to check for existence of an inner key.

There are some interesting libraries regarding this on pypi, here is a quick search for you.

In your specific case, dict_digger seems suited.

>>> import dict_digger
>>> d = {
  'Apple': {'American':'16', 'Mexican':10, 'Chinese':5},
  'Grapes':{'Arabian':'25','Indian':'20'} 
}

>>> print(dict_digger.dig(d, 'Apple','American'))
16
>>> print(dict_digger.dig(d, 'Grapes','American'))
None

How do I create a comma-separated list from an array in PHP?

Sometimes you don't even need php for this in certain instances (List items each are in their own generic tag on render for example) You can always add commas to all elements but last-child via css if they are separate elements after being rendered from the script.

I use this a lot in backbone apps actually to trim some arbitrary code fat:

.likers a:not(:last-child):after { content: ","; }

Basically looks at the element, targets all except it's last element, and after each item it adds a comma. Just an alternative way to not have to use script at all if the case applies.

How do I pick 2 random items from a Python set?

Use the random module: http://docs.python.org/library/random.html

import random
random.sample(set([1, 2, 3, 4, 5, 6]), 2)

This samples the two values without replacement (so the two values are different).

Using Python's list index() method on a list of tuples or objects?

No body suggest lambdas?

Y try this and works. I come to this post searching answer. I don't found that I like, but I feel a insingth :P

    l #[['rana', 1, 1], ['pato', 1, 1], ['perro', 1, 1]]

    map(lambda x:x[0], l).index("pato") #1

Edit to add examples:

   l=[['rana', 1, 1], ['pato', 2, 1], ['perro', 1, 1], ['pato', 2, 2], ['pato', 2, 2]]

extract all items by condition: filter(lambda x:x[0]=="pato", l) #[['pato', 2, 1], ['pato', 2, 2], ['pato', 2, 2]]

extract all items by condition with index:

    >>> filter(lambda x:x[1][0]=="pato", enumerate(l))
    [(1, ['pato', 2, 1]), (3, ['pato', 2, 2]), (4, ['pato', 2, 2])]
    >>> map(lambda x:x[1],_)
    [['pato', 2, 1], ['pato', 2, 2], ['pato', 2, 2]]

Note:_ variable only works in interactive interpreter y normal text file _ need explicti assign, ie _=filter(lambda x:x[1][0]=="pato", enumerate(l))

Hide axis values but keep axis tick labels in matplotlib

plt.gca().axes.yaxis.set_ticklabels([])

error: the details of the application error from being viewed remotely

Dear olga is clear what the message says. Turn off the custom errors to see the details about this error for fix it, and then you close them back. So add mode="off" as:

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>

Relative answer: Deploying website: 500 - Internal server error

By the way: The error message declare that the web.config is not the one you type it here. Maybe you have forget to upload your web.config ? And remember to close the debug flag on the web.config that you use for online pages.

php create object without class

you can always use new stdClass(). Example code:

   $object = new stdClass();
   $object->property = 'Here we go';

   var_dump($object);
   /*
   outputs:

   object(stdClass)#2 (1) {
      ["property"]=>
      string(10) "Here we go"
    }
   */

Also as of PHP 5.4 you can get same output with:

$object = (object) ['property' => 'Here we go'];

ERROR : [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

Perform the following steps:

Start the Registry Editor by typing regedit in the Run window.
Select the following key in the registry: HKEY_LOCAL_MACHINE\SOFTWARE\ODBC.
In the Security menu, click Permissions.
Grant Full Permission to the account which is being used for making connections.
Quit the Registry Editor.

jQuery - Dynamically Create Button and Attach Event Handler

You can either use onclick inside the button to ensure the event is preserved, or else attach the button click handler by finding the button after it is inserted. The test.html() call will not serialize the event.

Tkinter: "Python may not be configured for Tk"

To get this to work with pyenv on Ubuntu 16.04 and 18.04, I had to:

$ sudo apt-get install python-tk python3-tk tk-dev

Then install the version of Python I wanted:

$ pyenv install 3.6.2

Then I could import tkinter just fine:

import tkinter

How to make JavaScript execute after page load?

Look at hooking document.onload or in jQuery $(document).load(...).

How to create materialized views in SQL Server?

Although purely from engineering perspective, indexed views sound like something everybody could use to improve performance but the real life scenario is very different. I have been unsuccessful is using indexed views where I most need them because of too many restrictions on what can be indexed and what cannot.

If you have outer joins in the views, they cannot be used. Also, common table expressions are not allowed... In fact if you have any ordering in subselects or derived tables (such as with partition by clause), you are out of luck too.

That leaves only very simple scenarios to be utilizing indexed views, something in my opinion can be optimized by creating proper indexes on underlying tables anyway.

I will be thrilled to hear some real life scenarios where people have actually used indexed views to their benefit and could not have done without them

Equivalent of explode() to work with strings in MySQL

This is actually a modified version of the selected answer in order to support Unicode characters but I don't have enough reputation to comment there.

CREATE FUNCTION SPLIT_STRING(str VARCHAR(255) CHARSET utf8, delim VARCHAR(12), pos INT) RETURNS varchar(255) CHARSET utf8
RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(str, delim, pos),
       CHAR_LENGTH(SUBSTRING_INDEX(str, delim, pos-1)) + 1),
       delim, '')

The modifications are the following:

The first parameter is set as utf8
The function is set to return utf8
The code uses CHAR_LENGTH() instead of LENGTH() to calculate the character length and not the byte length.

Using SSIS BIDS with Visual Studio 2012 / 2013

Today March 6, 2013, Microsoft released SQL Server Data Tools – Business Intelligence for Visual Studio 2012 (SSDT BI) templates. With SSDT BI for Visual Studio 2012 you can develop and deploy SQL Server Business intelligence projects. Projects created in Visual Studio 2010 can be opened in Visual Studio 2012 and the other way around without upgrading or downgrading – it just works.

The download/install is named to ensure you get the SSDT templates that contain the Business Intelligence projects. The setup for these tools is now available from the web and can be downloaded in multiple languages right here: http://www.microsoft.com/download/details.aspx?id=36843

Binary Data in JSON String. Something better than Base64

The problem with UTF-8 is that it is not the most space efficient encoding. Also, some random binary byte sequences are invalid UTF-8 encoding. So you can't just interpret a random binary byte sequence as some UTF-8 data because it will be invalid UTF-8 encoding. The benefit of this constrain on the UTF-8 encoding is that it makes it robust and possible to locate multi byte chars start and end whatever byte we start looking at.

As a consequence, if encoding a byte value in the range [0..127] would need only one byte in UTF-8 encoding, encoding a byte value in the range [128..255] would require 2 bytes ! Worse than that. In JSON, control chars, " and \ are not allowed to appear in a string. So the binary data would require some transformation to be properly encoded.

Let see. If we assume uniformly distributed random byte values in our binary data then, on average, half of the bytes would be encoded in one bytes and the other half in two bytes. The UTF-8 encoded binary data would have 150% of the initial size.

Base64 encoding grows only to 133% of the initial size. So Base64 encoding is more efficient.

What about using another Base encoding ? In UTF-8, encoding the 128 ASCII values is the most space efficient. In 8 bits you can store 7 bits. So if we cut the binary data in 7 bit chunks to store them in each byte of an UTF-8 encoded string, the encoded data would grow only to 114% of the initial size. Better than Base64. Unfortunately we can't use this easy trick because JSON doesn't allow some ASCII chars. The 33 control characters of ASCII ( [0..31] and 127) and the " and \ must be excluded. This leaves us only 128-35 = 93 chars.

So in theory we could define a Base93 encoding which would grow the encoded size to 8/log2(93) = 8*log10(2)/log10(93) = 122%. But a Base93 encoding would not be as convenient as a Base64 encoding. Base64 requires to cut the input byte sequence in 6bit chunks for which simple bitwise operation works well. Beside 133% is not much more than 122%.

This is why I came independently to the common conclusion that Base64 is indeed the best choice to encode binary data in JSON. My answer presents a justification for it. I agree it isn't very attractive from the performance point of view, but consider also the benefit of using JSON with it's human readable string representation easy to manipulate in all programming languages.

If performance is critical than a pure binary encoding should be considered as replacement of JSON. But with JSON my conclusion is that Base64 is the best.

Is there a query language for JSON?

jq is a JSON query language, mainly intended for the command-line but with bindings to a wide range of programming languages (Java, node.js, php, ...) and even available in the browser via jq-web.

Here are some illustrations based on the original question, which gave this JSON as an example:

 [{"x": 2, "y": 0}}, {"x": 3, "y": 1}, {"x": 4, "y": 1}]

SUM(X) WHERE Y > 0 (would equate to 7)

map(select(.y > 0)) | add

LIST(X) WHERE Y > 0 (would equate to [3,4])

map(.y > 0)

jq syntax extends JSON syntax

Every JSON expression is a valid jq expression, and expressions such as [1, (1+1)] and {"a": (1+1)}` illustrate how jq extends JSON syntax.

A more useful example is the jq expression:

{a,b}

which, given the JSON value {"a":1, "b":2, "c": 3}, evaluates to {"a":1, "b":2}.

Select info from table where row has max date

SELECT group, date, checks
  FROM table 
  WHERE checks > 0
  GROUP BY group HAVING date = max(date)

should work.

How to check that Request.QueryString has a specific value or not in ASP.NET?

string.IsNullOrEmpty(Request.QueryString["aspxerrorpath"]) //true -> there is no value

Will return if there is a value

How to view/delete local storage in Firefox?

You can delete localStorage items one by one using Firebug (a useful web development extension) or Firefox's developer console.

Firebug Method

Open Firebug (click on the tiny bug icon in the lower right)
Go to the DOM tab
Scroll down to and expand localStorage
Right-click the item you wish to delete and press Delete Property

Developer Console Method

You can enter these commands into the console:

localStorage; // click arrow to view object's properties
localStorage.removeItem("foo"); 
localStorage.clear(); // remove all of localStorage's properties

Storage Inspector Method

Firefox now has a built in storage inspector, which you may need to manually enable. See rahilwazir's answer below.

How do I setup a SSL certificate for an express.js server?

This is my working code for express 4.0.

express 4.0 is very different from 3.0 and others.

4.0 you have /bin/www file, which you are going to add https here.

"npm start" is standard way you start express 4.0 server.

readFileSync() function should use __dirname get current directory

while require() use ./ refer to current directory.

First you put private.key and public.cert file under /bin folder, It is same folder as WWW file.

no such directory found error:

  key: fs.readFileSync('../private.key'),

  cert: fs.readFileSync('../public.cert')

error, no such directory found

  key: fs.readFileSync('./private.key'),

  cert: fs.readFileSync('./public.cert')

Working code should be

key: fs.readFileSync(__dirname + '/private.key', 'utf8'),

cert: fs.readFileSync(__dirname + '/public.cert', 'utf8')

Complete https code is:

const https = require('https');
const fs = require('fs');

// readFileSync function must use __dirname get current directory
// require use ./ refer to current directory.

const options = {
   key: fs.readFileSync(__dirname + '/private.key', 'utf8'),
  cert: fs.readFileSync(__dirname + '/public.cert', 'utf8')
};


 // Create HTTPs server.

 var server = https.createServer(options, app);

remote rejected master -> master (pre-receive hook declined)

If you run $ heroku logs you may get a "hint" to what the problem is. For me, Heroku could not detect what type of app I was creating. It required me to set the buildpack. Since I was creating a Node.js app, I just had to run $ heroku buildpacks:set https://github.com/heroku/heroku-buildpack-nodejs. You can read more about it here: https://devcenter.heroku.com/articles/buildpacks. No pushing issues after that.

I know this is an old question, but still posting this here incase someone else gets stuck.

How can I use custom fonts on a website?

Yes, there is a way. Its called custom fonts in CSS.Your CSS needs to be modified, and you need to upload those fonts to your website.

The CSS required for this is:

@font-face {
     font-family: Thonburi-Bold;
     src: url('pathway/Thonburi-Bold.otf'); 
}

What exactly is the function of Application.CutCopyMode property in Excel

Normally, When you copy a cell you will find the below statement written down in the status bar (in the bottom of your sheet)

"Select destination and Press Enter or Choose Paste"

Then you press whether Enter or choose paste to paste the value of the cell.

If you didn't press Esc afterwards you will be able to paste the value of the cell several times

Application.CutCopyMode = False does the same like the Esc button, if you removed it from your code you will find that you are able to paste the cell value several times again.

And if you closed the Excel without pressing Esc you will get the warning 'There is a large amount of information on the Clipboard....'

HTML table headers always visible at top of window when viewing a large table

I've encountered this problem very recently. Unfortunately, I had to do 2 tables, one for the header and one for the body. It's probably not the best approach ever but here goes:

_x000D_

<html>_x000D_
<head>_x000D_
    <title>oh hai</title>_x000D_
</head>_x000D_
<body>_x000D_
    <table id="tableHeader">_x000D_
        <tr>_x000D_
            <th style="width:100px; background-color:#CCCCCC">col header</th>_x000D_
            <th style="width:100px; background-color:#CCCCCC">col header</th>_x000D_
        </tr>_x000D_
    </table>_x000D_
    <div style="height:50px; overflow:auto; width:250px">_x000D_
        <table>_x000D_
            <tr>_x000D_
                <td style="height:50px; width:100px; background-color:#DDDDDD">data1</td>_x000D_
                <td style="height:50px; width:100px; background-color:#DDDDDD">data1</td>_x000D_
            </tr>_x000D_
            <tr>_x000D_
                <td style="height:50px; width:100px; background-color:#DDDDDD">data2</td>_x000D_
                <td style="height:50px; width:100px; background-color:#DDDDDD">data2</td>_x000D_
            </tr>_x000D_
        </table>_x000D_
    </div>_x000D_
</body>_x000D_
</html>

_x000D_

This worked for me, it's probably not the elegant way but it does work. I'll investigate so see if I can do something better, but it allows for multiple tables.

Go read on the overflow propriety to see if it fits your need

How to detect a docker daemon port

Try add -H tcp://0.0.0.0:2375(at end of Execstart line) instead of -H 0.0.0.0:2375.

What does Python's eval() do?

Failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED

CONNECTION_REFUSED is standard when the port is closed, but it could be rejected because SSL is failing authentication (one of a billion reasons). Did you configure SSL with Ratchet? (Apache is bypassed) Did you try without SSL in JavaScript?

I don't think Ratchet has built-in support for SSL. But even if it does you'll want to try the ws:// protocol first; it's a lot simpler, easier to debug, and closer to telnet. Chrome or the socket service may also be generating the REFUSED error if the service doesn't support SSL (because you explicitly requested SSL).

However the refused message is likely a server side problem, (usually port closed).

Mapping US zip code to time zone

If you want, you can also get a feel for the timezone by asking the browser Josh Fraser has a nice write up on it here

var rightNow = new Date();
var jan1 = new Date(rightNow.getFullYear(), 0, 1, 0, 0, 0, 0);
var temp = jan1.toGMTString();
var jan2 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1));
var std_time_offset = (jan1 - jan2) / (1000 * 60 * 60);

The second thing that you need to know is whether the location observes daylight savings time (DST) or not. Since DST is always observed during the summer, we can compare the time offset between two dates in January, to the time offset between two dates in June. If the offsets are different, then we know that the location observes DST. If the offsets are the same, then we know that the location DOES NOT observe DST.

var june1 = new Date(rightNow.getFullYear(), 6, 1, 0, 0, 0, 0);
temp = june1.toGMTString();
var june2 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1));
var daylight_time_offset = (june1 - june2) / (1000 * 60 * 60);
var dst;
if (std_time_offset == daylight_time_offset) {
    dst = "0"; // daylight savings time is NOT observed
} else {
    dst = "1"; // daylight savings time is observed
}

All credit for this goes to Josh Fraser.

This might help you with customers outside the US, and it might complement your zip approach.

Here is a SO questions that touch on getting the timezone from javascript

How to get the currently logged in user's user id in Django?

Assuming you are referring to Django's Auth User, in your view:

def game(request):
  user = request.user

  gta = Game.objects.create(name="gta", owner=user)

set the iframe height automatically

If the sites are on separate domains, the calling page can't access the height of the iframe due to cross-browser domain restrictions. If you have access to both sites, you may be able to use the [document domain hack].1 Then anroesti's links should help.

Go doing a GET request and building the Querystring

As a commenter mentioned you can get Values from net/url which has an Encode method. You could do something like this (req.URL.Query() returns the existing url.Values)

package main

import (
    "fmt"
    "log"
    "net/http"
    "os"
)

func main() {
    req, err := http.NewRequest("GET", "http://api.themoviedb.org/3/tv/popular", nil)
    if err != nil {
        log.Print(err)
        os.Exit(1)
    }

    q := req.URL.Query()
    q.Add("api_key", "key_from_environment_or_flag")
    q.Add("another_thing", "foo & bar")
    req.URL.RawQuery = q.Encode()

    fmt.Println(req.URL.String())
    // Output:
    // http://api.themoviedb.org/3/tv/popular?another_thing=foo+%26+bar&api_key=key_from_environment_or_flag
}

http://play.golang.org/p/L5XCrw9VIG

Remove special symbols and extra spaces and replace with underscore using the replace method

Remove the \s from your new regex and it should work - whitespace is already included in "anything but alphanumerics".

Note that you may want to add a + after the ] so you don't get sequences of more than one underscore. You can also chain onto .replace(/^_+|_+$/g,'') to trim off underscores at the start or end of the string.

IIS7 Permissions Overview - ApplicationPoolIdentity

ApplicationPoolIdentity is actually the best practice to use in IIS7+. It is a dynamically created, unprivileged account. To add file system security for a particular application pool see IIS.net's "Application Pool Identities". The quick version:

If the application pool is named "DefaultAppPool" (just replace this text below if it is named differently)

Open Windows Explorer
Select a file or directory.
Right click the file and select "Properties"
Select the "Security" tab
Click the "Edit" and then "Add" button
Click the "Locations" button and make sure you select the local machine. (Not the Windows domain if the server belongs to one.)
Enter "IIS AppPool\DefaultAppPool" in the "Enter the object names to select:" text box. (Don't forget to change "DefaultAppPool" here to whatever you named your application pool.)
Click the "Check Names" button and click "OK".

ImageMagick security policy 'PDF' blocking conversion

For me on Arch Linux, I had to comment this:

  <policy domain="delegate" rights="none" pattern="gs" />

How do I trap ctrl-c (SIGINT) in a C# console app

Console.TreatControlCAsInput = true; has worked for me.

What is the equivalent of "none" in django templates?

You can also use the built-in template filter default:

If value evaluates to False (e.g. None, an empty string, 0, False); the default "--" is displayed.

{{ profile.user.first_name|default:"--" }}

Documentation: https://docs.djangoproject.com/en/dev/ref/templates/builtins/#default

What is the correct Performance Counter to get CPU and Memory Usage of a Process?

Pelo Hyper-V:

private PerformanceCounter theMemCounter = new PerformanceCounter(
    "Hyper-v Dynamic Memory VM",
    "Physical Memory",
    Process.GetCurrentProcess().ProcessName);

VBA Print to PDF and Save with Automatic File Name

Hopefully this is self explanatory enough. Use the comments in the code to help understand what is happening. Pass a single cell to this function. The value of that cell will be the base file name. If the cell contains "AwesomeData" then we will try and create a file in the current users desktop called AwesomeData.pdf. If that already exists then try AwesomeData2.pdf and so on. In your code you could just replace the lines filename = Application..... with filename = GetFileName(Range("A1"))

Function GetFileName(rngNamedCell As Range) As String
    Dim strSaveDirectory As String: strSaveDirectory = ""
    Dim strFileName As String: strFileName = ""
    Dim strTestPath As String: strTestPath = ""
    Dim strFileBaseName As String: strFileBaseName = ""
    Dim strFilePath As String: strFilePath = ""
    Dim intFileCounterIndex As Integer: intFileCounterIndex = 1

    ' Get the users desktop directory.
    strSaveDirectory = Environ("USERPROFILE") & "\Desktop\"
    Debug.Print "Saving to: " & strSaveDirectory

    ' Base file name
    strFileBaseName = Trim(rngNamedCell.Value)
    Debug.Print "File Name will contain: " & strFileBaseName

    ' Loop until we find a free file number
    Do
        If intFileCounterIndex > 1 Then
            ' Build test path base on current counter exists.
            strTestPath = strSaveDirectory & strFileBaseName & Trim(Str(intFileCounterIndex)) & ".pdf"
        Else
            ' Build test path base just on base name to see if it exists.
            strTestPath = strSaveDirectory & strFileBaseName & ".pdf"
        End If

        If (Dir(strTestPath) = "") Then
            ' This file path does not currently exist. Use that.
            strFileName = strTestPath
        Else
            ' Increase the counter as we have not found a free file yet.
            intFileCounterIndex = intFileCounterIndex + 1
        End If

    Loop Until strFileName <> ""

    ' Found useable filename
    Debug.Print "Free file name: " & strFileName
    GetFileName = strFileName

End Function

The debug lines will help you figure out what is happening if you need to step through the code. Remove them as you see fit. I went a little crazy with the variables but it was to make this as clear as possible.

In Action

My cell O1 contained the string "FileName" without the quotes. Used this sub to call my function and it saved a file.

Sub Testing()
    Dim filename As String: filename = GetFileName(Range("o1"))

    ActiveWorkbook.Worksheets("Sheet1").Range("A1:N24").ExportAsFixedFormat Type:=xlTypePDF, _
                                              filename:=filename, _
                                              Quality:=xlQualityStandard, _
                                              IncludeDocProperties:=True, _
                                              IgnorePrintAreas:=False, _
                                              OpenAfterPublish:=False
End Sub

Where is your code located in reference to everything else? Perhaps you need to make a module if you have not already and move your existing code into there.

How to create Password Field in Model Django

I thinks it is vary helpful way.

models.py

from django.db import models
class User(models.Model):
    user_name = models.CharField(max_length=100)
    password = models.CharField(max_length=32)

forms.py

from django import forms
from Admin.models import *
class User_forms(forms.ModelForm):
    class Meta:
        model= User
        fields=[
           'user_name',
           'password'
            ]
       widgets = {
      'password': forms.PasswordInput()
         }

MYSQL Truncated incorrect DOUBLE value

I experienced this error when using bindParam, and specifying PDO::PARAM_INT where I was actually passing a string. Changing to PDO::PARAM_STR fixed the error.

IIS 7, HttpHandler and HTTP Error 500.21

I had the same problem and was solved by running the following in run

%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i

Check if a given key already exists in a dictionary and increment it

To answer the question "how can I find out if a given index in that dict has already been set to a non-None value", I would prefer this:

try:
  nonNone = my_dict[key] is not None
except KeyError:
  nonNone = False

This conforms to the already invoked concept of EAFP (easier to ask forgiveness then permission). It also avoids the duplicate key lookup in the dictionary as it would in key in my_dict and my_dict[key] is not None what is interesting if lookup is expensive.

For the actual problem that you have posed, i.e. incrementing an int if it exists, or setting it to a default value otherwise, I also recommend the

my_dict[key] = my_dict.get(key, default) + 1

as in the answer of Andrew Wilkinson.

There is a third solution if you are storing modifyable objects in your dictionary. A common example for this is a multimap, where you store a list of elements for your keys. In that case, you can use:

my_dict.setdefault(key, []).append(item)

If a value for key does not exist in the dictionary, the setdefault method will set it to the second parameter of setdefault. It behaves just like a standard my_dict[key], returning the value for the key (which may be the newly set value).

fetch in git doesn't get all branches

write it from the terminal

git fetch --prune.

it works fine.

Javascript - validation, numbers only

No need for the long code for number input restriction just try this code.

It also accepts valid int & float both values.

Javascript Approach

_x000D_

onload =function(){ _x000D_
  var ele = document.querySelectorAll('.number-only')[0];_x000D_
  ele.onkeypress = function(e) {_x000D_
     if(isNaN(this.value+""+String.fromCharCode(e.charCode)))_x000D_
        return false;_x000D_
  }_x000D_
  ele.onpaste = function(e){_x000D_
     e.preventDefault();_x000D_
  }_x000D_
}

_x000D_

<p> Input box that accepts only valid int and float values.</p>_x000D_
<input class="number-only" type=text />

_x000D_

jQuery Approach

_x000D_

$(function(){_x000D_
_x000D_
  $('.number-only').keypress(function(e) {_x000D_
 if(isNaN(this.value+""+String.fromCharCode(e.charCode))) return false;_x000D_
  })_x000D_
  .on("cut copy paste",function(e){_x000D_
 e.preventDefault();_x000D_
  });_x000D_
_x000D_
});

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<p> Input box that accepts only valid int and float values.</p>_x000D_
<input class="number-only" type=text />

_x000D_

The above answers are for most common use case - validating input as a number.

But to allow few special cases like negative numbers & showing the invalid keystrokes to user before removing it, so below is the code snippet for such special use cases.

_x000D_

$(function(){_x000D_
      _x000D_
  $('.number-only').keyup(function(e) {_x000D_
        if(this.value!='-')_x000D_
          while(isNaN(this.value))_x000D_
            this.value = this.value.split('').reverse().join('').replace(/[\D]/i,'')_x000D_
                                   .split('').reverse().join('');_x000D_
    })_x000D_
    .on("cut copy paste",function(e){_x000D_
     e.preventDefault();_x000D_
    });_x000D_
_x000D_
});

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<p> Input box that accepts only valid int and float values.</p>_x000D_
<input class="number-only" type=text />

_x000D_

In Java how does one turn a String into a char or a char into a String?

I like to do something like this:

String oneLetter = "" + someChar;

Select first 10 distinct rows in mysql

SELECT  DISTINCT *
FROM    people
WHERE   names = 'Smith'
ORDER BY
        names
LIMIT 10

Can an AJAX response set a cookie?

For the record, be advised that all of the above is (still) true only if the AJAX call is made on the same domain. If you're looking into setting cookies on another domain using AJAX, you're opening a totally different can of worms. Reading cross-domain cookies does work, however (or at least the server serves them; whether your client's UA allows your code to access them is, again, a different topic; as of 2014 they do).

Can Mockito stub a method without regard to the argument?

Use like this:

when(
  fooDao.getBar(
    Matchers.<Bazoo>any()
  )
).thenReturn(myFoo);

Before you need to import Mockito.Matchers

Finding index of character in Swift String

If you want to use familiar NSString, you can declare it explicitly:

var someString: NSString = "abcdefghi"

var someRange: NSRange = someString.rangeOfString("c")

I'm not sure yet how to do this in Swift.

Turn Pandas Multi-Index into column

This doesn't really apply to your case but could be helpful for others (like myself 5 minutes ago) to know. If one's multindex have the same name like this:

                         value
Trial        Trial
    1              0        13
                   1         3
                   2         4
    2              0       NaN
                   1        12
    3              0        34

df.reset_index(inplace=True) will fail, cause the columns that are created cannot have the same names.

So then you need to rename the multindex with df.index = df.index.set_names(['Trial', 'measurement']) to get:

                           value
Trial    measurement       

    1              0        13
    1              1         3
    1              2         4
    2              0       NaN
    2              1        12
    3              0        34

And then df.reset_index(inplace=True) will work like a charm.

I encountered this problem after grouping by year and month on a datetime-column(not index) called live_date, which meant that both year and month were named live_date.

What is HTML5 ARIA?

What is ARIA?

ARIA emerged as a way to address the accessibility problem of using a markup language intended for documents, HTML, to build user interfaces (UI). HTML includes a great many features to deal with documents (P, h3,UL,TABLE) but only basic UI elements such as A, INPUT and BUTTON. Windows and other operating systems support APIs that allow (Assistive Technology) AT to access the functionality of UI controls. Internet Explorer and other browsers map the native HTML elements to the accessibility API, but the html controls are not as rich as the controls common on desktop operating systems, and are not enough for modern web applications Custom controls can extend html elements to provide the rich UI needed for modern web applications. Before ARIA, the browser had no way to expose this extra richness to the accessibility API or AT. The classic example of this issue is adding a click handler to an image. It creates what appears to be a clickable button to a mouse user, but is still just an image to a keyboard or AT user.

The solution was to create a set of attributes that allow developers to extend HTML with UI semantics. The ARIA term for a group of HTML elements that have custom functionality and use ARIA attributes to map these functions to accessibility APIs is a “Widget. ARIA also provides a means for authors to document the role of content itself, which in turn, allows AT to construct alternate navigation mechanisms for the content that are much easier to use than reading the full text or only iterating over a list of the links.

It is important to remember that in simple cases, it is much preferred to use native HTML controls and style them rather than using ARIA. That is don’t reinvent wheels, or checkboxes, if you don’t have to.

Fortunately, ARIA markup can be added to existing sites without changing the behavior for mainstream users. This greatly reduces the cost of modifying and testing the website or application.

UITextView that expands to text using auto layout

Here's a quick solution:

This problem may occur if you have set clipsToBounds property to false of your textview. If you simply delete it, the problem goes away.

myTextView.clipsToBounds = false //delete this line

Python Function to test ping

It looks like you want the return keyword

def check_ping():
    hostname = "taylor"
    response = os.system("ping -c 1 " + hostname)
    # and then check the response...
    if response == 0:
        pingstatus = "Network Active"
    else:
        pingstatus = "Network Error"

    return pingstatus

You need to capture/'receive' the return value of the function(pingstatus) in a variable with something like:

pingstatus = check_ping()

NOTE: ping -c is for Linux, for Windows use ping -n

Some info on python functions:

http://www.tutorialspoint.com/python/python_functions.htm

http://www.learnpython.org/en/Functions

It's probably worth going through a good introductory tutorial to Python, which will cover all the fundamentals. I recommend investigating Udacity.com and codeacademy.com

LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria

Both are the element operators and they are used to select a single element from a sequence. But there is a minor difference between them. SingleOrDefault() operator would throw an exception if more than one elements are satisfied the condition where as FirstOrDefault() will not throw any exception for the same. Here is the example.

List<int> items = new List<int>() {9,10,9};
//Returns the first element of a sequence after satisfied the condition more than one elements
int result1 = items.Where(item => item == 9).FirstOrDefault();
//Throw the exception after satisfied the condition more than one elements
int result3 = items.Where(item => item == 9).SingleOrDefault();

Ways to eliminate switch in code

For C++

If you are referring to ie an AbstractFactory I think that a registerCreatorFunc(..) method usually is better than requiring to add a case for each and every "new" statement that is needed. Then letting all classes create and register a creatorFunction(..) which can be easy implemented with a macro (if I dare to mention). I believe this is a common approach many framework do. I first saw it in ET++ and I think many frameworks that require a DECL and IMPL macro uses it.

How to generate a create table script for an existing table in phpmyadmin?

Mysqladmin can do the job of saving out the create table script.

Step 1, create a table, insert some rows:

create table penguins (id int primary key, myval varchar(50))
insert into penguins values(2, 'werrhhrrhrh')
insert into penguins values(25, 'weeehehehehe')
select * from penguins

Step 2, use mysql dump command:

mysqldump --no-data --skip-comments --host=your_database_hostname_or_ip.com -u your_username --password=your_password your_database_name penguins > penguins.sql

Step 3, observe the output in penguins.sql:

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
DROP TABLE IF EXISTS `penguins`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `penguins` (
  `id` int(11) NOT NULL,
  `myval` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
/*!40101 SET character_set_client = @saved_cs_client */;
/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

The output is cluttered by a number of executional-condition tokens above and below. You can filter them out if you don't want them in the next step.

Step 4 (Optional), filter out those extra executional-condition tokens this way:

mysqldump --no-data --skip-comments --compact --host=your_database_hostname_or_ip.com -u your_username --password=your_password your_database_name penguins > penguins.sql

Which produces final output:

eric@dev /home/el $ cat penguins.sql

DROP TABLE IF EXISTS `penguins`;
CREATE TABLE `penguins` (
  `id` int(11) NOT NULL,
  `myval` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

How to add a named sheet at the end of all Excel sheets?

Kindly use this one liner:

Sheets.Add(After:=Sheets(Sheets.Count)).Name = "new_sheet_name"

Convert a hexadecimal string to an integer efficiently in C?

For AVR Microcontrollers I wrote the following function, including relevant comments to make it easy to understand:

/**
 * hex2int
 * take a hex string and convert it to a 32bit number (max 8 hex digits)
 */
uint32_t hex2int(char *hex) {
    uint32_t val = 0;
    while (*hex) {
        // get current character then increment
        char byte = *hex++; 
        // transform hex character to the 4bit equivalent number, using the ascii table indexes
        if (byte >= '0' && byte <= '9') byte = byte - '0';
        else if (byte >= 'a' && byte <='f') byte = byte - 'a' + 10;
        else if (byte >= 'A' && byte <='F') byte = byte - 'A' + 10;    
        // shift 4 to make space for new digit, and add the 4 bits of the new digit 
        val = (val << 4) | (byte & 0xF);
    }
    return val;
}

Example:

char *z ="82ABC1EF";
uint32_t x = hex2int(z);
printf("Number is [%X]\n", x);

Will output:

How to check if an element exists in the xml using xpath?

take look at my example

<tocheading language="EN"> 
     <subj-group> 
         <subject>Editors Choice</subject> 
         <subject>creative common</subject> 
     </subj-group> 
</tocheading>

now how to check if creative common is exist

tocheading/subj-group/subject/text() = 'creative common'

hope this help you

Dynamically create an array of strings with malloc


#define ID_LEN 5
char **orderedIds;
int i;
int variableNumberOfElements = 5; /* Hard coded here */

orderedIds = (char **)malloc(variableNumberOfElements * (ID_LEN + 1) * sizeof(char));

..

SQL Server stored procedure creating temp table and inserting value

A SELECT INTO statement creates the table for you. There is no need for the CREATE TABLE statement before hand.

What is happening is that you create #ivmy_cash_temp1 in your CREATE statement, then the DB tries to create it for you when you do a SELECT INTO. This causes an error as it is trying to create a table that you have already created.

Either eliminate the CREATE TABLE statement or alter your query that fills it to use INSERT INTO SELECT format.

If you need a unique ID added to your new row then it's best to use SELECT INTO... since IDENTITY() only works with this syntax.

Passing Variable through JavaScript from one html page to another page

Without reading your code but just your scenario, I would solve by using localStorage. Here's an example, I'll use prompt() for short.

On page1:

window.onload = function() {
   var getInput = prompt("Hey type something here: ");
   localStorage.setItem("storageName",getInput);
}

On page2:

window.onload = alert(localStorage.getItem("storageName"));

You can also use cookies but localStorage allows much more spaces, and they aren't sent back to servers when you request pages.

What is the meaning of ImagePullBackOff status on a Kubernetes pod?

The issue arises when the image is not present on the cluster and k8s engine is going to pull the respective registry. k8s Engine enables 3 types of ImagePullPolicy mentioned :

Always : It always pull the image in container irrespective of changes in the image
Never : It will never pull the new image on the container
IfNotPresent : It will pull the new image in cluster if the image is not present.

Best Practices : It is always recommended to tag the new image in both docker file as well as k8s deployment file. So That it can pull the new image in container.

How do I clear a search box with an 'x' in bootstrap 3?

I tried to avoid too much custom CSS and after reading some other examples I merged the ideas there and got this solution:

<div class="form-group has-feedback has-clear">
    <input type="text" class="form-control" ng-model="ctrl.searchService.searchTerm" ng-change="ctrl.search()" placeholder="Suche"/>
    <a class="glyphicon glyphicon-remove-sign form-control-feedback form-control-clear" ng-click="ctrl.clearSearch()" style="pointer-events: auto; text-decoration: none;cursor: pointer;"></a>
</div>

As I don't use bootstrap's JavaScript, just the CSS together with Angular, I don't need the classes has-clear and form-control-clear, and I implemented the clear function in my AngularJS controller. With bootstrap's JavaScript this might be possible without own JavaScript.

Windows command to get service status?

Well i see "Nick Kavadias" telling this:

"according to this http://www.computerhope.com/nethlp.htm it should be NET START /LIST ..."

If you type in Windows XP this:

NET START /LIST

you will get an error, just type instead

NET START

The /LIST is only for Windows 2000... If you fully read such web you would see the /LIST is only on Windows 2000 section.

Hope this helps!!!

How do I retrieve query parameters in Spring Boot?

In Spring boot: 2.1.6, you can use like below:

    @GetMapping("/orders")
    @ApiOperation(value = "retrieve orders", response = OrderResponse.class, responseContainer = "List")
    public List<OrderResponse> getOrders(
            @RequestParam(value = "creationDateTimeFrom", required = true) String creationDateTimeFrom,
            @RequestParam(value = "creationDateTimeTo", required = true) String creationDateTimeTo,
            @RequestParam(value = "location_id", required = true) String location_id) {

        // TODO...

        return response;

@ApiOperation is an annotation that comes from Swagger api, It is used for documenting the apis.

AttributeError: Can only use .dt accessor with datetimelike values

When you write

df['Date'] = pd.to_datetime(df['Date'], errors='coerce')
df['Date'] = df['Date'].dt.strftime('%m/%d')

It can fixed

Array versus linked-list

First of all, in C++ linked-lists shouldn't be much more trouble to work with than an array. You can use the std::list or the boost pointer list for linked lists. The key issues with linked lists vs arrays are extra space required for pointers and terrible random access. You should use a linked list if you

you don't need random access to the data
you will be adding/deleting elements, especially in the middle of the list

Android: alternate layout xml for landscape mode

You can group your specific layout under the correct folder structure as follows.

layout-land-target_version

layout-land-19 // target KitKat

likewise you can create your layouts.

Hope this will help you

Override valueof() and toString() in Java enum

I don't think your going to get valueOf("Start Here") to work. But as far as spaces...try the following...

static private enum RandomEnum {
    R("Start There"), 
    G("Start Here"); 
    String value;
    RandomEnum(String s) {
        value = s;
    }
}

System.out.println(RandomEnum.G.value);
System.out.println(RandomEnum.valueOf("G").value);

Start Here
Start Here

Test if a command outputs an empty string

Here's an alternative approach that writes the std-out and std-err of some command a temporary file, and then checks to see if that file is empty. A benefit of this approach is that it captures both outputs, and does not use sub-shells or pipes. These latter aspects are important because they can interfere with trapping bash exit handling (e.g. here)

tmpfile=$(mktemp)
some-command  &> "$tmpfile"
if [[ $? != 0 ]]; then
    echo "Command failed"
elif [[ -s "$tmpfile" ]]; then
    echo "Command generated output"
else
    echo "Command has no output"
fi
rm -f "$tmpfile"

How to disassemble a binary executable in Linux to get the assembly code?

there's also ndisasm, which has some quirks, but can be more useful if you use nasm. I agree with Michael Mrozek that objdump is probably best.

[later] you might also want to check out Albert van der Horst's ciasdis: http://home.hccnet.nl/a.w.m.van.der.horst/forthassembler.html. it can be hard to understand, but has some interesting features you won't likely find anywhere else.

Bundling data files with PyInstaller (--onefile)

Another solution is to make a runtime hook, which will copy(or move) your data (files/folders) to the directory at which the executable is stored. The hook is a simple python file that can almost do anything, just before the execution of your app. In order to set it, you should use the --runtime-hook=my_hook.py option of pyinstaller. So, in case your data is an images folder, you should run the command:

pyinstaller.py --onefile -F --add-data=images;images --runtime-hook=cp_images_hook.py main.py

The cp_images_hook.py could be something like this:

import sys
import os
import shutil

path = getattr(sys, '_MEIPASS', os.getcwd())

full_path = path+"\\images"
try:
    shutil.move(full_path, ".\\images")
except:
    print("Cannot create 'images' folder. Already exists.")

Before every execution the images folder is moved to the current directory (from the _MEIPASS folder), so the executable will always have access to it. In that way there is no need to modify your project's code.

Second Solution

You can take advantage of the runtime-hook mechanism and change the current directory, which is not a good practice according to some developers, but it works fine.

The hook code can be found below:

import sys
import os

path = getattr(sys, '_MEIPASS', os.getcwd())   
os.chdir(path)

LDAP filter for blank (empty) attribute

The schema definition for an attribute determines whether an attribute must have a value. If the manager attribute in the example given is the attribute defined in RFC4524 with OID 0.9.2342.19200300.100.1.10, then that attribute has DN syntax. DN syntax is a sequence of relative distinguished names and must not be empty. The filter given in the example is used to cause the LDAP directory server to return only entries that do not have a manager attribute to the LDAP client in the search result.

How do I add a delay in a JavaScript loop?

Try something like this:

_x000D_

var i = 0, howManyTimes = 10;

function f() {
  console.log("hi");
  i++;
  if (i < howManyTimes) {
    setTimeout(f, 3000);
  }
}

f();

_x000D_

Converting string to number in javascript/jQuery

You can adding a + before the string without using parseInt and parseFloat and radix, Simply

sample:

var votevalue = +$('button').data('votevalue');

alert(typeof(votevalue));

How to delete stuff printed to console by System.out.println()?

Just to add to BalusC's anwswer...

Invoking System.out.print("\b \b") repeatedly with a delay gives an exact same behavior as when we hit backspaces in {Windows 7 command console / Java 1.6}

How can you find the height of text on an HTML canvas?

This works 1) for multiline text as well 2) and even in IE9!

<div class="measureText" id="measureText">
</div>


.measureText {
  margin: 0;
  padding: 0;
  border: 0;
  font-family: Arial;
  position: fixed;
  visibility: hidden;
  height: auto;
  width: auto;
  white-space: pre-wrap;
  line-height: 100%;
}

function getTextFieldMeasure(fontSize, value) {
    const div = document.getElementById("measureText");

    // returns wrong result for multiline text with last line empty
    let arr = value.split('\n');
    if (arr[arr.length-1].length == 0) {
        value += '.';
    }

    div.innerText = value;
    div.style['font-size']= fontSize + "px";
    let rect = div.getBoundingClientRect();

    return {width: rect.width, height: rect.height};
};

How to replace all double quotes to single quotes using jquery?

You can also use replaceAll(search, replaceWith) [MDN].

Then, make sure you have a string by wrapping one type of quotes by a different type:

 'a "b" c'.replaceAll('"', "'")
 // result: "a 'b' c"
    
 'a "b" c'.replaceAll(`"`, `'`)
 // result: "a 'b' c"

 // Using RegEx. You MUST use a global RegEx(Meaning it'll match all occurrences).
 'a "b" c'.replaceAll(/\"/g, "'")
 // result: "a 'b' c"

Important(!) if you choose regex:

when using a regexp you have to set the global ("g") flag; otherwise, it will throw a TypeError: "replaceAll must be called with a global RegExp".

How to detect page zoom level in all modern browsers?

This may or may not help anyone, but I had a page I could not get to center correctly no matter what Css tricks I tried so I wrote a JQuery file call Center Page:

The problem occurred with zoom level of the browser, the page would shift based upon if you were 100%, 125%, 150%, etc.

The code below is in a JQuery file called centerpage.js.

From my page I had to link to JQuery and this file to get it work, even though my master page already had a link to JQuery.

<title>Home Page.</title>
<script src="Scripts/jquery-1.7.1.min.js"></script>
<script src="Scripts/centerpage.js"></script>

centerpage.js:

// centering page element
function centerPage() {
    // get body element
    var body = document.body;

    // if the body element exists
    if (body != null) {
        // get the clientWidth
        var clientWidth = body.clientWidth;

        // request data for centering
        var windowWidth = document.documentElement.clientWidth;
        var left = (windowWidth - bodyWidth) / 2;

        // this is a hack, but it works for me a better method is to determine the 
        // scale but for now it works for my needs
        if (left > 84) {
            // the zoom level is most likely around 150 or higher
            $('#MainBody').removeClass('body').addClass('body150');
        } else if (left < 100) {
            // the zoom level is most likely around 110 - 140
            $('#MainBody').removeClass('body').addClass('body125');
        }
    }
}


// CONTROLLING EVENTS IN jQuery
$(document).ready(function() {
    // center the page
    centerPage();
});

Also if you want to center a panel:

// centering panel
function centerPanel($panelControl) {
    // if the panel control exists
    if ($panelControl && $panelControl.length) {
        // request data for centering
        var windowWidth = document.documentElement.clientWidth;
        var windowHeight = document.documentElement.clientHeight;
        var panelHeight = $panelControl.height();
        var panelWidth = $panelControl.width();

        // centering
        $panelControl.css({
            'position': 'absolute',
            'top': (windowHeight - panelHeight) / 2,
            'left': (windowWidth - panelWidth) / 2
        });

        // only need force for IE6
        $('#backgroundPanel').css('height', windowHeight);
    }
}

Spark - repartition() vs coalesce()

I would like to add to Justin and Power's answer that -

repartition will ignore existing partitions and create new ones. So you can use it to fix data skew. You can mention partition keys to define the distribution. Data skew is one of the biggest problems in the 'big data' problem space.

coalesce will work with existing partitions and shuffle a subset of them. It can't fix the data skew as much as repartition does. Therefore even if it is less expensive it might not be the thing you need.

What does file:///android_asset/www/index.html mean?

If someone uses AndroidStudio make sure that the assets folder is placed in

app/src/main/assets

directory.

Write string to text file and ensure it always overwrites the existing content.

Generally, FileMode.Create is what you're looking for.

How to set the DefaultRoute to another Route in React Router

UPDATE : 2020

Instead of using Redirect, Simply add multiple route in the path

Example:

<Route exact path={["/","/defaultPath"]} component={searchDashboard} />

Arithmetic operation resulted in an overflow. (Adding integers)

int.MaxValue = 2147483647
2055786000 + 93552000 = 2149338000 > int.MaxValue

So you cannot store this number into an integer. You could use Int64 type which has a maximum value of 9,223,372,036,854,775,807.

GIT clone repo across local file system in windows

Maybe map the share as a network drive and then do

git clone Z:\

Mostly just a guess; I always do this stuff using ssh. Following that suggstion of course will mean that you'll need to have that drive mapped every time you push/pull to/from the laptop. I'm not sure how you rig up ssh to work under windows but if you're going to be doing this a lot it might be worth investigating.

How to reduce a huge excel file

If your file is just text, the best solution is to save each worksheet as .csv and then reimport it into excel - it takes a bit more work, but I reduced a 20MB file to 43KB.

Wait until all promises complete even if some rejected

Here's my custom settledPromiseAll()

const settledPromiseAll = function(promisesArray) {
  var savedError;

  const saveFirstError = function(error) {
    if (!savedError) savedError = error;
  };
  const handleErrors = function(value) {
    return Promise.resolve(value).catch(saveFirstError);
  };
  const allSettled = Promise.all(promisesArray.map(handleErrors));

  return allSettled.then(function(resolvedPromises) {
    if (savedError) throw savedError;
    return resolvedPromises;
  });
};

Compared to Promise.all

If all promises are resolved, it performs exactly as the standard one.
If one of more promises are rejected, it returns the first one rejected much the same as the standard one but unlike it waits for all promises to resolve/reject.

For the brave we could change Promise.all():

(function() {
  var stdAll = Promise.all;

  Promise.all = function(values, wait) {
    if(!wait)
      return stdAll.call(Promise, values);

    return settledPromiseAll(values);
  }
})();

CAREFUL. In general we never change built-ins, as it might break other unrelated JS libraries or clash with future changes to JS standards.

My settledPromiseall is backward compatible with Promise.all and extends its functionality.

People who are developing standards -- why not include this to a new Promise standard?

Close/kill the session when the browser or tab is closed

I do it like this:

$(window).bind('unload', function () {
    if(event.clientY < 0) {  
        alert('Thank you for using this app.');
        endSession(); // here you can do what you want ...
    }  
    });
window.onbeforeunload = function () {
    $(window).unbind('unload');
    //If a string is returned, you automatically ask the 
    //user if he wants to logout or not...
    //return ''; //'beforeunload event'; 
    if (event.clientY < 0) {
        alert('Thank you for using this service.');
        endSession();
    }  
}

Locating child nodes of WebElements in selenium

I also found myself in a similar position a couple of weeks ago. You can also do this by creating a custom ElementLocatorFactory (or simply passing in divA into the DefaultElementLocatorFactory) to see if it's a child of the first div - you would then call the appropriate PageFactory initElements method.

In this case if you did the following:

PageFactory.initElements(new DefaultElementLocatorFactory(divA), pageObjectInstance));
// The Page Object instance would then need a WebElement 
// annotated with something like the xpath above or @FindBy(tagName = "input")

How to get Url Hash (#) from server side

RFC 2396 section 4.1:

When a URI reference is used to perform a retrieval action on the identified resource, the optional fragment identifier, separated from the URI by a crosshatch ("#") character, consists of additional reference information to be interpreted by the user agent after the retrieval action has been successfully completed. As such, it is not part of a URI, but is often used in conjunction with a URI.

(emphasis added)

How to open Android Device Monitor in latest Android Studio 3.1

To get it to work I had to switch to Java 8 from Java 10 (In my system PATH variable) then go to C:\Users\Alex\AppData\Local\Android\Sdk\tools\lib\monitor-x86_64 and run monitor.exe.

How to see my Eclipse version?

Go to Help -> About Eclipse Sdk

enter image description here

Hibernate: ids for this class must be manually assigned before calling save()

your id attribute is not set. this MAY be due to the fact that the DB field is not set to auto increment? what DB are you using? MySQL? is your field set to AUTO INCREMENT?

How do I set the timeout for a JAX-WS webservice client?

Not sure if this will help in your context...

Can the soap object be cast as a BindingProvider ?

MyWebServiceSoap soap;
MyWebService service = new MyWebService("http://www.google.com");
soap = service.getMyWebServiceSoap();
// set timeouts here
((BindingProvider)soap).getRequestContext().put("com.sun.xml.internal.ws.request.timeout", 10000);
    soap.sendRequestToMyWebService();

On the other hand if you are wanting to set the timeout on the initialization of the MyWebService object then this will not help.

This worked for me when wanting to timeout the individual WebService calls.

How do I set the offset for ScrollSpy in Bootstrap?

How to change a package name in Eclipse?

Change the Package Name in Manifest.
A warning box will be said to change into workspace ,press "yes"
then right click on src-> refactor -> rename paste your package name
select package name and sub package name both
press "save" a warning pop ups , press "continue"

name changed successfully

ngModel cannot be used to register form controls with a parent formGroup directive

_x000D_

import { FormControl, FormGroup, AbstractControl, FormBuilder, Validators } from '@angular/forms';_x000D_
_x000D_
_x000D_
    this.userInfoForm = new FormGroup({_x000D_
      userInfoUserName: new FormControl({ value: '' }, Validators.compose([Validators.required])),_x000D_
      userInfoName: new FormControl({ value: '' }, Validators.compose([Validators.required])),_x000D_
      userInfoSurName: new FormControl({ value: '' }, Validators.compose([Validators.required]))_x000D_
    });

_x000D_

<form [formGroup]="userInfoForm" class="form-horizontal">_x000D_
            <div class="form-group">_x000D_
                <label class="control-label"><i>*</i> User Name</label>_x000D_
                    <input type="text" formControlName="userInfoUserName" class="form-control" [(ngModel)]="userInfo.userName">_x000D_
            </div>_x000D_
            <div class="form-group">_x000D_
                <label class="control-label"><i>*</i> Name</label>_x000D_
                    <input type="text" formControlName="userInfoName" class="form-control" [(ngModel)]="userInfo.name">_x000D_
            </div>_x000D_
            <div class="form-group">_x000D_
                <label class="control-label"><i>*</i> Surname</label>_x000D_
                    <input type="text" formControlName="userInfoSurName" class="form-control" [(ngModel)]="userInfo.surName">_x000D_
            </div>_x000D_
</form>

_x000D_

How to test if a list contains another list?

Smallest code:

def contains(a,b):
    str(a)[1:-1].find(str(b)[1:-1])>=0

How to get value by class name in JavaScript or jquery?

Try this:

$(document).ready(function(){
    var yourArray = [];
    $("span.HOEnZb").find("div").each(function(){
        if(($.trim($(this).text()).length>0)){
         yourArray.push($(this).text());
        }
    });
});

DEMO

What is the best way to parse html in C#?

You could use TidyNet.Tidy to convert the HTML to XHTML, and then use an XML parser.

Another alternative would be to use the builtin engine mshtml:

using mshtml;
...
object[] oPageText = { html };
HTMLDocument doc = new HTMLDocumentClass();
IHTMLDocument2 doc2 = (IHTMLDocument2)doc;
doc2.write(oPageText);

This allows you to use javascript-like functions like getElementById()

How do you use "git --bare init" repository?

Answering your questions one by one:

Bare repository is the one that has no working tree. It means its whole contents is what you have in .git directory.

You can only commit to bare repository by pushing to it from your local clone. It has no working tree, so it has no files modified, no changes.

To have central repository the only way it is to have a bare repository.

How add unique key to existing table (with non uniques rows)

I am providing my solution with the assumption on your business logic. Basicall in my design i will allow the table to store only one record for a user-game combination. So I will add a composite key to the table.

PRIMARY KEY (`user_id`,`game_id`)

How to export SQL Server 2005 query to CSV

For adhoc queries:

Show results in grid mode (CTRL+D), run query, click top left hand box in results grid, paste to Excel, save as CSV. You may be able to paste directly into a text file (can't try it now)

Or "Results to file" has options too for CSV

Or "Results to text" with comma separators

All settings under Tool..Options and Query.. options (I think, can't check) too

Export and import table dump (.sql) using pgAdmin

In pgAdmin, select the required target schema in object tree (databases->your_db_name->schemas->your_target_schema)
Click on Plugins/PSQL Console (in top-bar)
Write \i /path/to/yourfile.sql
Press enter

How to identify whether a grammar is LL(1), LR(0) or SLR(1)?

LL(1) grammar is Context free unambiguous grammar which can be parsed by LL(1) parsers.

In LL(1)

First L stands for scanning input from Left to Right. Second L stands for Left Most Derivation. 1 stands for using one input symbol at each step.

For Checking grammar is LL(1) you can draw predictive parsing table. And if you find any multiple entries in table then you can say grammar is not LL(1).

Their is also short cut to check if the grammar is LL(1) or not . Shortcut Technique

How to split a string in Ruby and get all items except the first one?

if u want to use them as an array u already knew, else u can use every one of them as a different parameter ... try this :

parameter1,parameter2,parameter3,parameter4,parameter5 = ex.split(",")

Parsing CSV files in C#, with header

Based on unlimit's post on How to properly split a CSV using C# split() function? :

string[] tokens = System.Text.RegularExpressions.Regex.Split(paramString, ",");

NOTE: this doesn't handle escaped / nested commas, etc., and therefore is only suitable for certain simple CSV lists.

Add newline to VBA or Visual Basic 6

Visual Basic has built-in constants for newlines:

vbCr = Chr$(13) = CR (carriage-return character) - used by Mac OS and Apple II family

vbLf = Chr$(10) = LF (line-feed character) - used by Linux and Mac OS X

vbCrLf = Chr$(13) & Chr$(10) = CRLF (carriage-return followed by line-feed) - used by Windows

vbNewLine = the same as vbCrLf

Windows 8.1 gets Error 720 on connect VPN

First I would like to thank Rose who was willing to help us, but your answer could solve the problem on a computer, but in others there was what was done could not always connect gets error 720. After much searching and contact the Microsoft support we can solve. In Device Manager, on the View menu, select to show hidden devices. Made it look for a remote Miniport IP or network monitor that is with warning of problems with the driver icon. In its properties in the details tab check the Key property of the driver. Look for this key in Regedit on Local Machine, make a backup of that key and delete it. Restart your windows. Reopen your device manager and select the miniport that had deleted the record. Activate the option to update the driver and look for the option driver on the computer manually and then use the option to locate the driver from the list available on the computer on the next screen uncheck show compatible hardware. Then you must select the Microsoft Vendor and the driver WAN Miniport the type that is changing, IP or IPV6 L2TP Network Monitor. After upgrading restart the computer.

I know it's a bit laborious but that was the only way that worked on all computers.

How do I initialize Kotlin's MutableList to empty MutableList?

Various forms depending on type of List, for Array List:

val myList = mutableListOf<Kolory>() 
// or more specifically use the helper for a specific list type
val myList = arrayListOf<Kolory>()

For LinkedList:

val myList = linkedListOf<Kolory>()
// same as
val myList: MutableList<Kolory> = linkedListOf()

For other list types, will be assumed Mutable if you construct them directly:

val myList = ArrayList<Kolory>()
// or
val myList = LinkedList<Kolory>()

This holds true for anything implementing the List interface (i.e. other collections libraries).

No need to repeat the type on the left side if the list is already Mutable. Or only if you want to treat them as read-only, for example:

val myList: List<Kolory> = ArrayList()

Syntax for async arrow function

Immediately Invoked Async Arrow Function:

(async () => {
    console.log(await asyncFunction());
})();

Immediately Invoked Async Function Expression:

(async function () {
    console.log(await asyncFunction());
})();

Prevent flex items from overflowing a container

Your flex items have

flex: 0 0 200px; /* <aside> */
flex: 1 0 auto;  /* <article> */

That means:

The <aside> will start at 200px wide.

Then it won't grow nor shrink.
The <article> will start at the width given by the content.

Then, if there is available space, it will grow to cover it.

Otherwise it won't shrink.

To prevent horizontal overflow, you can:

Use flex-basis: 0 and then let them grow with a positive flex-grow.
Use a positive flex-shrink to let them shrink if there isn't enough space.

To prevent vertical overflow, you can

Use min-height instead of height to allow the flex items grow more if necessary
Use overflow different than visible on the flex items
Use overflow different than visible on the flex container

For example,

_x000D_

main, aside, article {
  margin: 10px;
  border: solid 1px #000;
  border-bottom: 0;
  min-height: 50px; /* min-height instead of height */
}
main {
  display: flex;
}
aside {
  flex: 0 1 200px; /* Positive flex-shrink */
}
article {
  flex: 1 1 auto; /* Positive flex-shrink */
}

_x000D_

<main>
  <aside>x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x </aside>
  <article>don't let flex item overflow container.... y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y y </article>
</main>

_x000D_

Oracle PL/SQL string compare issue

To fix the core question, "how should I detect that these two variables don't have the same value when one of them is null?", I don't like the approach of nvl(my_column, 'some value that will never, ever, ever appear in the data and I can be absolutely sure of that') because you can't always guarantee that a value won't appear... especially with NUMBERs.

I have used the following:

if (str1 is null) <> (str2 is null) or str1 <> str2 then
  dbms_output.put_line('not equal');
end if;

Disclaimer: I am not an Oracle wizard and I came up with this one myself and have not seen it elsewhere, so there may be some subtle reason why it's a bad idea. But it does avoid the trap mentioned by APC, that comparing a null to something else gives neither TRUE nor FALSE but NULL. Because the clauses (str1 is null) will always return TRUE or FALSE, never null.

(Note that PL/SQL performs short-circuit evaluation, as noted here.)

How to convert float value to integer in php?

There is always intval() - Not sure if this is what you were looking for...

example: -

$floatValue = 4.5;
echo intval($floatValue);    // Returns 4

It won't round off the value to an integer, but will strip out the decimal and trailing digits, and return the integer before the decimal.

Here is some documentation for this: - http://php.net/manual/en/function.intval.php

SQL how to check that two tables has exactly the same data?

just to complet, a proc stored using except method to compare 2 tables and give result in same table with 3 errors status, ADD, DEL, GAP table must have same PK, you declare the 2 tables and fields to compare of 1 or both table

Just use like this ps_TableGap 'tbl1','Tbl2','fld1,fld2,fld3','fld4'fld5'fld6' (optional)

/****** Object:  StoredProcedure [dbo].[ps_TableGap]    Script Date: 10/03/2013 16:03:44 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

-- =============================================
-- Author:       Arnaud ALLAVENA
-- Create date: 03.10.2013
-- Description: Compare tables
-- =============================================
create PROCEDURE [dbo].[ps_TableGap]
    -- Add the parameters for the stored procedure here
    @Tbl1 as varchar(100),@Tbl2 as varchar(100),@Fld1 as varchar(1000), @Fld2 as varchar(1000)= ''
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.

    SET NOCOUNT ON;
--Variables
--@Tbl1 = table 1
--@Tbl2 = table 2
--@Fld1 = Fields to compare from table 1
--@Fld2 Fields to compare from table 2
Declare @SQL varchar(8000)= '' --SQL statements
Declare @nLoop int = 1 --loop counter
Declare @Pk varchar(1000)= '' --primary key(s) 
Declare @Pk1 varchar(1000)= '' --first field of primary key
declare @strTmp varchar(50) = '' --returns value in Pk determination
declare @FldTmp varchar (1000) = '' --temporarily fields for alias calculation

--If @Fld2 empty we take @Fld1
--fields rules: fields to be compare must be in same order and type - always returns Gap
If @Fld2 = '' Set @Fld2 = @Fld1

--Change @Fld2 with Alias prefix xxx become _xxx 
while charindex(',',@Fld2)>0
begin
    Set @FldTmp = @FldTmp + (select substring(@Fld2,1,charindex(',',@Fld2)-1) + ' as _' + substring(@Fld2,1,charindex(',',@Fld2)-1) + ',')
    Set @Fld2 = (select ltrim(right(@Fld2,len(@Fld2)-charindex(',',@Fld2))))
end
Set @FldTmp = @FldTmp + @Fld2 + ' as _' + @Fld2
Set @Fld2 = @FldTmp

--Determinate primary key jointure
--rule: same pk in both tables
Set @nLoop = 1
Set @SQL = 'Declare crsr cursor for select COLUMN_NAME from INFORMATION_SCHEMA.KEY_COLUMN_USAGE where TABLE_NAME = '''
 + @Tbl1 + ''' or TABLE_SCHEMA + ''.'' + TABLE_NAME = ''' + @Tbl1 +  ''' or TABLE_CATALOG + ''.'' + TABLE_SCHEMA + ''.'' + TABLE_NAME = ''' + @Tbl1 
 + ''' order by ORDINAL_POSITION'
exec(@SQL)
open crsr 
fetch next from crsr into @strTmp
while @@fetch_status = 0
begin 
    if @nLoop = 1 
    begin 
        Set @Pk = 's.' + @strTmp + ' = b._' + @strTmp
        Set @Pk1 = @strTmp
        set @nLoop = @nLoop + 1 
    end 
    Else
    Set @Pk = @Pk + ' and s.' + @strTmp + ' = b._' + @strTmp
fetch next from crsr into @strTmp 

end 
close crsr
deallocate crsr

--SQL statement build
set @SQL = 'select case when s.' + @Pk1 + ' is null then ''Del'' when b._' + @Pk1 + ' is null then ''Add'' else ''Gap'' end as TypErr, '''
set @SQL = @SQL + @Tbl1 +''' as Tbl1, s.*, ''' + @Tbl2 +''' as Tbl2 ,b.* from (Select ' + @Fld1 + ' from ' + @Tbl1
set @SQL = @SQL + ' EXCEPT SELECT ' + @Fld2 + ' from ' + @Tbl2 + ')s full join (Select ' + @Fld2 + ' from ' + @Tbl2 
set @SQL = @SQL + ' EXCEPT SELECT ' + @Fld1 + ' from ' + @Tbl1 +')b on '+ @Pk 

--Run SQL statement
Exec(@SQL)
END

Ignoring a class property in Entity Framework 4.1 Code First

You can use the NotMapped attribute data annotation to instruct Code-First to exclude a particular property

public class Customer
{
    public int CustomerID { set; get; }
    public string FirstName { set; get; } 
    public string LastName{ set; get; } 
    [NotMapped]
    public int Age { set; get; }
}

[NotMapped] attribute is included in the System.ComponentModel.DataAnnotations namespace.

You can alternatively do this with Fluent API overriding OnModelCreating function in your DBContext class:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
   modelBuilder.Entity<Customer>().Ignore(t => t.LastName);
   base.OnModelCreating(modelBuilder);
}

http://msdn.microsoft.com/en-us/library/hh295847(v=vs.103).aspx

The version I checked is EF 4.3, which is the latest stable version available when you use NuGet.

Edit : SEP 2017

Asp.NET Core(2.0)

Data annotation

If you are using asp.net core (2.0 at the time of this writing), The [NotMapped] attribute can be used on the property level.

public class Customer
{
    public int Id { set; get; }
    public string FirstName { set; get; } 
    public string LastName { set; get; } 
    [NotMapped]
    public int FullName { set; get; }
}

Fluent API

public class SchoolContext : DbContext
{
    public SchoolContext(DbContextOptions<SchoolContext> options) : base(options)
    {
    }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Customer>().Ignore(t => t.FullName);
        base.OnModelCreating(modelBuilder);
    }
    public DbSet<Customer> Customers { get; set; }
}

How to set DialogFragment's width and height?

This is the simplest solution

The best solution I have found is to override onCreateDialog() instead of onCreateView(). setContentView() will set the correct window dimensions before inflating. It removes the need to store/set a dimension, background color, style, etc in resource files and setting them manually.

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    Dialog dialog = new Dialog(getActivity());
    dialog.setContentView(R.layout.fragment_dialog);

    Button button = (Button) dialog.findViewById(R.id.dialog_button);
    // ...
    return dialog;
}

Servlet Mapping using web.xml

It allows servlets to have multiple servlet mappings:

<servlet>
    <servlet-name>Servlet1</servlet-name>
    <servlet-path>foo.Servlet</servlet-path>
</servlet>
<servlet-mapping>
    <servlet-name>Servlet1</servlet-name>
    <url-pattern>/enroll</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>Servlet1</servlet-name>
    <url-pattern>/pay</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>Servlet1</servlet-name>
    <url-pattern>/bill</url-pattern>
</servlet-mapping>

It allows filters to be mapped on the particular servlet:

<filter-mapping>
    <filter-name>Filter1</filter-name>
    <servlet-name>Servlet1</servlet-name>
</filter-mapping>

Your proposal would support neither of them. Note that the web.xml is read and parsed only once during application's startup, not on every HTTP request as you seem to think.

Since Servlet 3.0, there's the @WebServlet annotation which minimizes this boilerplate:

@WebServlet("/enroll")
public class Servlet1 extends HttpServlet {

How to know if a DateTime is between a DateRange in C#

You can use:

return (dateTocheck >= startDate && dateToCheck <= endDate);

Increase max_execution_time in PHP?

Add this to an htaccess file (and see edit notes added below):

<IfModule mod_php5.c>
   php_value post_max_size 200M
   php_value upload_max_filesize 200M
   php_value memory_limit 300M
   php_value max_execution_time 259200
   php_value max_input_time 259200
   php_value session.gc_maxlifetime 1200
</IfModule>

Additional resources and information:

2021 EDIT:

As PHP and Apache evolve and grow, I think it is important for me to take a moment to mention a few things to consider and possible "gotchas" to consider:

PHP can be run as a module or as CGI. It is not recommended to run as CGI as it creates a lot of opportunities for attack vectors [Read More]. Running as a module (the safer option) will trigger the settings to be used if the specific module from <IfModule is loaded.
The answer indicates to write mod_php5.c in the first line. If you are using PHP 7, you would replace that with mod_php7.c.
Sometimes after you make changes to your .htaccess file, restarting Apache or NGINX will not work. The most common reason for this is you are running PHP-FPM, which runs as a separate process. You need to restart that as well.
Remember these are settings that are normally defined in your php.ini config file(s). This method is usually only useful in the event your hosting provider does not give you access to change those files. In circumstances where you can edit the PHP configuration, it is recommended that you apply these settings there.
Finally, it's important to note that not all php.ini settings can be configured via an .htaccess file. A file list of php.ini directives can be found here, and the only ones you can change are the ones in the changeable column with the modes PHP_INI_ALL or PHP_INI_PERDIR.

How to filter multiple values (OR operation) in angularJS

Please try this

var m = angular.module('yourModuleName');
m.filter('advancefilter', ['$filter', function($filter){
    return function(data, text){
        var textArr = text.split(' ');
        angular.forEach(textArr, function(test){
            if(test){
                  data = $filter('filter')(data, test);
            }
        });
        return data;
    }
}]);

How do I install jmeter on a Mac?

I am also new to this.
I have followed this process to start the application in Mac:

I downloaded apache-jmeter-3.3_src.zip from http://jmeter.apache.org/download_jmeter.cgi website.
I extracted the files and then move to bin folder and then you can find a file named jmeter, this is an executable file. Right click on this and open with terminal and wait for 5 minutes, that's it.

Thank you, I hope this might help.

Expanding a parent <div> to the height of its children

I made a parent div expand around content of a child div by having the child div as a single column that does not have any positioning attribute such as absolute specified.

Example:

#wrap {width:400px;padding:10px 200px 10px 200px;position:relative;margin:0px auto;}
#maincolumn {width:400px;}

Based on maincolumn div being the deepest child div of #wrap this defines the depth of the #wrap div and the 200px padding on either side creates two big blank columns for you to place absolutely positioned divs in as you please. You could even change the padding top and bottom to place header divs and footer divs using position:absolute.

How to return a specific status code and no contents from Controller?

This code might work for non-.NET Core MVC controllers:

this.HttpContext.Response.StatusCode = 418; // I'm a teapot
return Json(new { status = "mer" }, JsonRequestBehavior.AllowGet);

Is there a way to 'uniq' by column?

Here is a very nifty way.

First format the content such that the column to be compared for uniqueness is a fixed width. One way of doing this is to use awk printf with a field/column width specifier ("%15s").

Now the -f and -w options of uniq can be used to skip preceding fields/columns and to specify the comparison width (column(s) width).

Here are three examples.

In the first example...

1) Temporarily make the column of interest a fixed width greater than or equal to the field's max width.

2) Use -f uniq option to skip the prior columns, and use the -w uniq option to limit the width to the tmp_fixed_width.

3) Remove trailing spaces from the column to "restore" it's width (assuming there were no trailing spaces beforehand).

printf "%s" "$str" \
| awk '{ tmp_fixed_width=15; uniq_col=8; w=tmp_fixed_width-length($uniq_col); for (i=0;i<w;i++) { $uniq_col=$uniq_col" "}; printf "%s\n", $0 }' \
| uniq -f 7 -w 15 \
| awk '{ uniq_col=8; gsub(/ */, "", $uniq_col); printf "%s\n", $0 }'

In the second example...

Create a new uniq column 1. Then remove it after the uniq filter has been applied.

printf "%s" "$str" \
| awk '{ uniq_col_1=4; printf "%15s %s\n", uniq_col_1, $0 }' \
| uniq -f 0 -w 15 \
| awk '{ $1=""; gsub(/^ */, "", $0); printf "%s\n", $0 }'

The third example is the same as the second, but for multiple columns.

printf "%s" "$str" \
| awk '{ uniq_col_1=4; uniq_col_2=8; printf "%5s %15s %s\n", uniq_col_1, uniq_col_2, $0 }' \
| uniq -f 0 -w 5 \
| uniq -f 1 -w 15 \
| awk '{ $1=$2=""; gsub(/^ */, "", $0); printf "%s\n", $0 }'

What does `unsigned` in MySQL mean and when to use it?

MySQL says:

All integer types can have an optional (nonstandard) attribute UNSIGNED. Unsigned type can be used to permit only nonnegative numbers in a column or when you need a larger upper numeric range for the column. For example, if an INT column is UNSIGNED, the size of the column's range is the same but its endpoints shift from -2147483648 and 2147483647 up to 0 and 4294967295.

When do I use it ?

Ask yourself this question: Will this field ever contain a negative value?
If the answer is no, then you want an UNSIGNED data type.

A common mistake is to use a primary key that is an auto-increment INT starting at zero, yet the type is SIGNED, in that case you’ll never touch any of the negative numbers and you are reducing the range of possible id's to half.

How to validate a form with multiple checkboxes to have atleast one checked

  $('#subscribeForm').validate( {
      rules: {
          list: {
              required: true,
              minlength: 1
          }
       }
   });

I think this will make sure at least one is checked.

C++ String Concatenation operator<<

You can combine strings using stream string like that:

#include <iostream>
#include <sstream>
using namespace std;
int main()
{
    string name = "Bill";
    stringstream ss;
    ss << "Your name is: " << name;
    string info = ss.str();
    cout << info << endl;
    return 0;
}

jQuery UI Tabs - How to Get Currently Selected Tab Index

When are you trying to access the ui object? ui will be undefined if you try to access it outside of the bind event. Also, if this line

var selectedTab = $("#TabList").tabs().data("selected.tabs");

is ran in the event like this:

$("#TabList").bind("tabsselect", function(event, ui) {
  var selectedTab = $("#TabList").tabs().data("selected.tabs");
});

selectedTab will equal the current tab at that point in time (the "previous" one.) This is because the "tabsselect" event is called before the clicked tab becomes the current tab. If you still want to do it this way, using "tabsshow" instead will result in selectedTab equaling the clicked tab.

However, that seems over-complex if all you want is the index. ui.index from within the event or $("#TabList").tabs().data("selected.tabs") outside of the event should be all that you need.

Delete last char of string

Strings in c# are immutable. When in your code you do strgroupids.TrimEnd(','); or strgroupids.TrimEnd(new char[] { ',' }); the strgroupids string is not modified.

You need to do something like strgroupids = strgroupids.TrimEnd(','); instead.

To quote from here:

Strings are immutable--the contents of a string object cannot be changed after the object is created, although the syntax makes it appear as if you can do this. For example, when you write this code, the compiler actually creates a new string object to hold the new sequence of characters, and that new object is assigned to b. The string "h" is then eligible for garbage collection.

How to get URL of current page in PHP

 $uri = $_SERVER['REQUEST_URI'];

This will give you the requested directory and file name. If you use mod_rewrite, this is extremely useful because it tells you what page the user was looking at.

If you need the actual file name, you might want to try either $_SERVER['PHP_SELF'], the magic constant __FILE__, or $_SERVER['SCRIPT_FILENAME']. The latter 2 give you the complete path (from the root of the server), rather than just the root of your website. They are useful for includes and such.

$_SERVER['PHP_SELF'] gives you the file name relative to the root of the website.

 $relative_path = $_SERVER['PHP_SELF'];
 $complete_path = __FILE__;
 $complete_path = $_SERVER['SCRIPT_FILENAME'];

python how to pad numpy array with zeros

Very simple, you create an array containing zeros using the reference shape:

result = np.zeros(b.shape)
# actually you can also use result = np.zeros_like(b) 
# but that also copies the dtype not only the shape

and then insert the array where you need it:

result[:a.shape[0],:a.shape[1]] = a

and voila you have padded it:

print(result)
array([[ 1.,  1.,  1.,  1.,  1.,  0.],
       [ 1.,  1.,  1.,  1.,  1.,  0.],
       [ 1.,  1.,  1.,  1.,  1.,  0.],
       [ 0.,  0.,  0.,  0.,  0.,  0.]])

You can also make it a bit more general if you define where your upper left element should be inserted

result = np.zeros_like(b)
x_offset = 1  # 0 would be what you wanted
y_offset = 1  # 0 in your case
result[x_offset:a.shape[0]+x_offset,y_offset:a.shape[1]+y_offset] = a
result

array([[ 0.,  0.,  0.,  0.,  0.,  0.],
       [ 0.,  1.,  1.,  1.,  1.,  1.],
       [ 0.,  1.,  1.,  1.,  1.,  1.],
       [ 0.,  1.,  1.,  1.,  1.,  1.]])

but then be careful that you don't have offsets bigger than allowed. For x_offset = 2 for example this will fail.

If you have an arbitary number of dimensions you can define a list of slices to insert the original array. I've found it interesting to play around a bit and created a padding function that can pad (with offset) an arbitary shaped array as long as the array and reference have the same number of dimensions and the offsets are not too big.

def pad(array, reference, offsets):
    """
    array: Array to be padded
    reference: Reference array with the desired shape
    offsets: list of offsets (number of elements must be equal to the dimension of the array)
    """
    # Create an array of zeros with the reference shape
    result = np.zeros(reference.shape)
    # Create a list of slices from offset to offset + shape in each dimension
    insertHere = [slice(offset[dim], offset[dim] + array.shape[dim]) for dim in range(a.ndim)]
    # Insert the array in the result at the specified offsets
    result[insertHere] = a
    return result

And some test cases:

import numpy as np

# 1 Dimension
a = np.ones(2)
b = np.ones(5)
offset = [3]
pad(a, b, offset)

# 3 Dimensions

a = np.ones((3,3,3))
b = np.ones((5,4,3))
offset = [1,0,0]
pad(a, b, offset)

How to delete rows from a pandas DataFrame based on a conditional expression

You can assign the DataFrame to a filtered version of itself:

df = df[df.score > 50]

This is faster than drop:

%%timeit
test = pd.DataFrame({'x': np.random.randn(int(1e6))})
test = test[test.x < 0]
# 54.5 ms ± 2.02 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

%%timeit
test = pd.DataFrame({'x': np.random.randn(int(1e6))})
test.drop(test[test.x > 0].index, inplace=True)
# 201 ms ± 17.9 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

%%timeit
test = pd.DataFrame({'x': np.random.randn(int(1e6))})
test = test.drop(test[test.x > 0].index)
# 194 ms ± 7.03 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

What is the point of WORKDIR on Dockerfile?

You can think of WORKDIR like a cd inside the container (it affects commands that come later in the Dockerfile, like the RUN command). If you removed WORKDIR in your example above, RUN npm install wouldn't work because you would not be in the /usr/src/app directory inside your container.

I don't see how this would be related to where you put your Dockerfile (since your Dockerfile location on the host machine has nothing to do with the pwd inside the container). You can put the Dockerfile wherever you'd like in your project. However, the first argument to COPY is a relative path, so if you move your Dockerfile you may need to update those COPY commands.

How to pass in a react component into another react component to transclude the first component's content?

const ParentComponent = (props) => {
  return(
    {props.childComponent}
    //...additional JSX...
  )
}

//import component
import MyComponent from //...where ever

//place in var
const myComponent = <MyComponent />

//pass as prop
<ParentComponent childComponent={myComponent} />

Searching for Text within Oracle Stored Procedures

 SELECT * FROM ALL_source WHERE UPPER(text) LIKE '%BLAH%'

EDIT Adding additional info:

 SELECT * FROM DBA_source WHERE UPPER(text) LIKE '%BLAH%'

The difference is dba_source will have the text of all stored objects. All_source will have the text of all stored objects accessible by the user performing the query. Oracle Database Reference 11g Release 2 (11.2)

Another difference is that you may not have access to dba_source.

JavaScript: set dropdown selected item based on option text

This works in latest Chrome, FireFox and Edge, but not IE11:

document.evaluate('//option[text()="Yahoo"]', document).iterateNext().selected = 'selected';

And if you want to ignore spaces around the title:

document.evaluate('//option[normalize-space(text())="Yahoo"]', document).iterateNext().selected = 'selected'

"could not find stored procedure"

Could not find stored procedure?---- means when you get this.. our code like this

String sp="{call GetUnitReferenceMap}";

stmt=conn.prepareCall(sp);

ResultSet rs = stmt.executeQuery();

while (rs.next()) {

currencyMap.put(rs.getString(1).trim(), rs.getString(2).trim());

I have 4 DBs(sample1, sample2, sample3) But stmt will search location is master Default DB then we will get Exception.

we should provide DB name then problem resolves::

String sp="{call sample1..GetUnitReferenceMap}";

Android - How to download a file from a webserver

Apart from using AsyncTask you can put the operation in runnable-

Runnable r=new Runnable()
{

public void run()
{
///-------network operation code
}
};

//--------call r in this way--
Thread t=new Thread(r);`enter code here`
t.start();

Also put the UI work in a haldler..such as updating a textview etc..

e.printStackTrace equivalent in python

import traceback
traceback.print_exc()

When doing this inside an except ...: block it will automatically use the current exception. See http://docs.python.org/library/traceback.html for more information.

PHP regular expressions: No ending delimiter '^' found in

PHP regex strings need delimiters. Try:

$numpattern="/^([0-9]+)$/";

Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the regex to /^\d+$/.

Example: http://ideone.com/Ec3zh

Oracle select most recent date record

i think i'd try with MAX something like this:

SELECT staff_id, max( date ) from owner.table group by staff_id

then link in your other columns:

select staff_id, site_id, pay_level, latest
from owner.table, 
(   SELECT staff_id, max( date ) latest from owner.table group by staff_id ) m
where m.staff_id = staff_id
and m.latest = date

List columns with indexes in PostgreSQL

\d table_name shows this information from psql, but if you want to get such information from database using SQL then have a look at Extracting META information from PostgreSQL.

I use such info in my utility to report some info from db schema to compare PostgreSQL databases in test and production environments.

execute shell command from android

A modification of the code by @CarloCannas:

public static void sudo(String...strings) {
    try{
        Process su = Runtime.getRuntime().exec("su");
        DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());

        for (String s : strings) {
            outputStream.writeBytes(s+"\n");
            outputStream.flush();
        }

        outputStream.writeBytes("exit\n");
        outputStream.flush();
        try {
            su.waitFor();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        outputStream.close();
    }catch(IOException e){
        e.printStackTrace();
    }
}

(You are welcome to find a better place for outputStream.close())

Usage example:

private static void suMkdirs(String path) {
    if (!new File(path).isDirectory()) {
        sudo("mkdir -p "+path);
    }
}

Update: To get the result (the output to stdout), use:

public static String sudoForResult(String...strings) {
    String res = "";
    DataOutputStream outputStream = null;
    InputStream response = null;
    try{
        Process su = Runtime.getRuntime().exec("su");
        outputStream = new DataOutputStream(su.getOutputStream());
        response = su.getInputStream();

        for (String s : strings) {
            outputStream.writeBytes(s+"\n");
            outputStream.flush();
        }

        outputStream.writeBytes("exit\n");
        outputStream.flush();
        try {
            su.waitFor();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        res = readFully(response);
    } catch (IOException e){
        e.printStackTrace();
    } finally {
        Closer.closeSilently(outputStream, response);
    }
    return res;
}
public static String readFully(InputStream is) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    int length = 0;
    while ((length = is.read(buffer)) != -1) {
        baos.write(buffer, 0, length);
    }
    return baos.toString("UTF-8");
}

The utility to silently close a number of Closeables (So?ket may be no Closeable) is:

public class Closer {
// closeAll()
public static void closeSilently(Object... xs) {
    // Note: on Android API levels prior to 19 Socket does not implement Closeable
    for (Object x : xs) {
        if (x != null) {
            try {
                Log.d("closing: "+x);
                if (x instanceof Closeable) {
                    ((Closeable)x).close();
                } else if (x instanceof Socket) {
                    ((Socket)x).close();
                } else if (x instanceof DatagramSocket) {
                    ((DatagramSocket)x).close();
                } else {
                    Log.d("cannot close: "+x);
                    throw new RuntimeException("cannot close "+x);
                }
            } catch (Throwable e) {
                Log.x(e);
            }
        }
    }
}
}

How do you use youtube-dl to download live streams (that are live)?

Some websites with m3u streaming cannot be downloaded in a single youtube-dl step, you can try something like this :

$ URL=https://www.arte.tv/fr/videos/078132-001-A/cosmos-une-odyssee-a-travers-l-univers/
$ youtube-dl -F $URL | grep m3u
HLS_XQ_2     m3u8       1280x720   VA-STA, Allemand 2200k 
HLS_XQ_1     m3u8       1280x720   VF-STF, Français 2200k 
$ CHOSEN_FORMAT=HLS_XQ_1
$ youtube-dl -F "$(youtube-dl -gf $CHOSEN_FORMAT)"
[generic] master: Requesting header
[generic] master: Downloading webpage
[generic] master: Downloading m3u8 information
[info] Available formats for master:
format code  extension  resolution note
61           mp4        audio only   61k , mp4a.40.2
419          mp4        384x216     419k , avc1.66.30, mp4a.40.2
923          mp4        640x360     923k , avc1.77.30, mp4a.40.2
1737         mp4        720x406    1737k , avc1.77.30, mp4a.40.2
2521         mp4        1280x720   2521k , avc1.77.30, mp4a.40.2 (best)
$ youtube-dl --hls-prefer-native -f 1737 "$(youtube-dl -gf $CHOSEN_FORMAT $URL)" -o "$(youtube-dl -f $CHOSEN_FORMAT --get-filename $URL)"
[generic] master: Requesting header
[generic] master: Downloading webpage
[generic] master: Downloading m3u8 information
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 257
[download] Destination: Cosmos_une_odyssee_a_travers_l_univers__HLS_XQ_1__078132-001-A.mp4
[download]   0.9% of ~731.27MiB at 624.95KiB/s ETA 13:13
....

DateTimePicker time picker in 24 hour but displaying in 12hr?

To show the correct 24H format, for example, only put

$(function () {
    $('#date').datetimepicker({
         format: 'DD/MM/YYYY HH:mm',
    });

});

Python: Find a substring in a string and returning the index of the substring

Adding onto @demented hedgehog answer on using find()

In terms of efficiency

It may be worth first checking to see if s1 is in s2 before calling find().
This can be more efficient if you know that most of the times s1 won't be a substring of s2

Since the in operator is very efficient

 s1 in s2

It can be more efficient to convert:

index = s2.find(s1)

index = -1
if s1 in s2:
   index = s2.find(s1)

This is useful for when find() is going to be returning -1 a lot.

I found it substantially faster since find() was being called many times in my algorithm, so I thought it was worth mentioning

How to use BeanUtils.copyProperties?

There are two BeanUtils.copyProperties(parameter1, parameter2) in Java.

One is

org.apache.commons.beanutils.BeanUtils.copyProperties(Object dest, Object orig)

Another is

org.springframework.beans.BeanUtils.copyProperties(Object source, Object target)

Pay attention to the opposite position of parameters.

Check if a class `active` exist on element with jquery

use the hasClass jQuery method

Kotlin: How to get and set a text to TextView in Android using Kotlin?

In kotlin don't use getters and setters as like in java.The correct format of the kotlin is given below.

val textView: TextView = findViewById(R.id.android_text) as TextView
textView.setOnClickListener {
    textView.text = getString(R.string.name)
}

To get the values from the Textview we have to use this method

 val str: String = textView.text.toString()

 println("the value is $str")

Speed tradeoff of Java's -Xms and -Xmx options

Allocation always depends on your OS. If you allocate too much memory, you could end up having loaded portions into swap, which indeed is slow.
Whether your program runs slower or faster depends on the references the VM has to handle and to clean. The GC doesn't have to sweep through the allocated memory to find abandoned objects. It knows it's objects and the amount of memory they allocate by reference mapping. So sweeping just depends on the size of your objects. If your program behaves the same in both cases, the only performance impact should be on VM startup, when the VM tries to allocate memory provided by your OS and if you use the swap (which again leads to 1.)

Regex: match word that ends with "Id"

How about \A[a-z]*Id\z? [This makes characters before Id optional. Use \A[a-z]+Id\z if there needs to be one or more characters preceding Id.]

What's the best way to test SQL Server connection programmatically?

For what Joel Coehorn suggested, have you already tried the utility named tcping. I know this is something you are not doing programmatically. It is a standalone executable which allows you to ping every specified time interval. It is not in C# though. Also..I am not sure If this would work If the target machine has firewall..hmmm..

[I am kinda new to this site and mistakenly added this as a comment, now added this as an answer. Let me know If this can be done here as I have duplicate comments (as comment and as an answer) here. I can not delete comments here.]

How do you round a double in Dart to a given degree of precision AFTER the decimal point?

Above solutions do not appropriately round numbers. I use:

double dp(double val, int places){ 
   double mod = pow(10.0, places); 
   return ((val * mod).round().toDouble() / mod); 
}

Why does JPA have a @Transient annotation?

For Kotlin developers, remember the Java transient keyword becomes the built-in Kotlin @Transient annotation. Therefore, make sure you have the JPA import if you're using JPA @Transient in your entity:

import javax.persistence.Transient

Is it possible in Java to access private fields via reflection

Yes it is possible.

You need to use the getDeclaredField method (instead of the getField method), with the name of your private field:

Field privateField = Test.class.getDeclaredField("str");

Additionally, you need to set this Field to be accessible, if you want to access a private field:

privateField.setAccessible(true);

Once that's done, you can use the get method on the Field instance, to access the value of the str field.

Check div is hidden using jquery

Did you notice your typo, $car2 instead of #car2 ?

Anyway, :hidden seems to be working as expected, try it here.

Javascript close alert box

Try boot box plugin.

var alert = bootbox.alert('Massage')
alert.show();
setTimeout(function(){alert.modal('hide'); }, 4000);

How to read line by line or a whole text file at once?

Well, to do this one can also use the freopen function provided in C++ - http://www.cplusplus.com/reference/cstdio/freopen/ and read the file line by line as follows -:

#include<cstdio>
#include<iostream>

using namespace std;

int main(){
   freopen("path to file", "rb", stdin);
   string line;
   while(getline(cin, line))
       cout << line << endl;
   return 0;
}

How to iterate over a TreeMap?

Assuming type TreeMap<String,Integer> :

for(Map.Entry<String,Integer> entry : treeMap.entrySet()) {
  String key = entry.getKey();
  Integer value = entry.getValue();

  System.out.println(key + " => " + value);
}

(key and Value types can be any class of course)

Comparing two .jar files

use java decompiler and decompile all the .class files and save all files as project structure .

then use meld diff viewer and compare as folders ..

Where does R store packages?

This is documented in the 'R Installation and Administration' manual that came with your installation.

On my Linux box:

R> .libPaths()
[1] "/usr/local/lib/R/site-library" "/usr/lib/R/site-library"      
[3] "/usr/lib/R/library"           
R>

meaning that the default path is the first of these. You can override that via an argument to both install.packages() (from inside R) or R CMD INSTALL (outside R).

You can also override by setting the R_LIBS_USER variable.

TypeError: can't pickle _thread.lock objects

I had the same problem with Pool() in Python 3.6.3.

Error received: TypeError: can't pickle _thread.RLock objects

Let's say we want to add some number num_to_add to each element of some list num_list in parallel. The code is schematically like this:

class DataGenerator:
    def __init__(self, num_list, num_to_add)
        self.num_list = num_list # e.g. [4,2,5,7]
        self.num_to_add = num_to_add # e.g. 1 

        self.run()

    def run(self):
        new_num_list = Manager().list()

        pool = Pool(processes=50)
        results = [pool.apply_async(run_parallel, (num, new_num_list)) 
                      for num in num_list]
        roots = [r.get() for r in results]
        pool.close()
        pool.terminate()
        pool.join()

    def run_parallel(self, num, shared_new_num_list):
        new_num = num + self.num_to_add # uses class parameter
        shared_new_num_list.append(new_num)

The problem here is that self in function run_parallel() can't be pickled as it is a class instance. Moving this parallelized function run_parallel() out of the class helped. But it's not the best solution as this function probably needs to use class parameters like self.num_to_add and then you have to pass it as an argument.

Solution:

def run_parallel(num, shared_new_num_list, to_add): # to_add is passed as an argument
    new_num = num + to_add
    shared_new_num_list.append(new_num)

class DataGenerator:
    def __init__(self, num_list, num_to_add)
        self.num_list = num_list # e.g. [4,2,5,7]
        self.num_to_add = num_to_add # e.g. 1

        self.run()

    def run(self):
        new_num_list = Manager().list()

        pool = Pool(processes=50)
        results = [pool.apply_async(run_parallel, (num, new_num_list, self.num_to_add)) # num_to_add is passed as an argument
                      for num in num_list]
        roots = [r.get() for r in results]
        pool.close()
        pool.terminate()
        pool.join()

Other suggestions above didn't help me.

Media Queries - In between two widths

You need to switch your values:

/* No greater than 900px, no less than 400px */
@media (max-width:900px) and (min-width:400px) {
    .foo {
        display:none;
    }
}?

Demo: http://jsfiddle.net/xf6gA/ (using background color, so it's easier to confirm)

How to create dynamic href in react render function?

Could you please try this ?

Create another item in post such as post.link then assign the link to it before send post to the render function.

post.link = '/posts/+ id.toString();

So, the above render function should be following instead.

return <li key={post.id}><a href={post.link}>{post.title}</a></li>

How to create a fixed-size array of objects

Fixed-length arrays are not yet supported. What does that actually mean? Not that you can't create an array of n many things — obviously you can just do let a = [ 1, 2, 3 ] to get an array of three Ints. It means simply that array size is not something that you can declare as type information.

If you want an array of nils, you'll first need an array of an optional type — [SKSpriteNode?], not [SKSpriteNode] — if you declare a variable of non-optional type, whether it's an array or a single value, it cannot be nil. (Also note that [SKSpriteNode?] is different from [SKSpriteNode]?... you want an array of optionals, not an optional array.)

Swift is very explicit by design about requiring that variables be initialized, because assumptions about the content of uninitialized references are one of the ways that programs in C (and some other languages) can become buggy. So, you need to explicitly ask for an [SKSpriteNode?] array that contains 64 nils:

var sprites = [SKSpriteNode?](repeating: nil, count: 64)

This actually returns a [SKSpriteNode?]?, though: an optional array of optional sprites. (A bit odd, since init(count:,repeatedValue:) shouldn't be able to return nil.) To work with the array, you'll need to unwrap it. There's a few ways to do that, but in this case I'd favor optional binding syntax:

if var sprites = [SKSpriteNode?](repeating: nil, count: 64){
    sprites[0] = pawnSprite
}

Angular 5 ngHide ngShow [hidden] not working

If you want to just toggle visibility and still keep the input in DOM:

<input class="txt" type="password" [(ngModel)]="input_pw" 
 [style.visibility]="isHidden? 'hidden': 'visible'">

The other way around is as per answer by rrd, which is to use HTML hidden attribute. In an HTML element if hidden attribute is set to true browsers are supposed to hide the element from display, but the problem is that this behavior is overridden if the element has an explicit display style mentioned.

_x000D_

.hasDisplay {_x000D_
  display: block;_x000D_
}

_x000D_

<input class="hasDisplay" hidden value="shown" />_x000D_
<input hidden value="not shown">

_x000D_

To overcome this you can opt to use an explicit css for [hidden] that overrides the display;

[hidden] {
  display: none !important;
}

Yet another way is to have a is-hidden class and do:

<input [class.is-hidden]="isHidden"/>

.is-hidden {
      display: none;
 }

If you use display: none the element will be skipped from the static flow and no space will be allocated for the element, if you use visibility: hidden it will be included in the flow and a space will be allocated but it will be blank space.

The important thing is to use one way across an application rather than mixing different ways thereby making the code less maintainable.

If you want to remove it from DOM

<input class="txt" type="password" [(ngModel)]="input_pw" *ngIf="!isHidden">

Python: split a list based on a condition?

Sometimes you won't need that other half of the list. For example:

import sys
from itertools import ifilter

trustedPeople = sys.argv[1].split(',')
newName = sys.argv[2]

myFriends = ifilter(lambda x: x.startswith('Shi'), trustedPeople)

print '%s is %smy friend.' % (newName, newName not in myFriends 'not ' or '')

-didSelectRowAtIndexPath: not being called

I just found another way to not get your didSelect method called. At some point, prolly during some error in func declaration itself, XCode suggested I add @nonobjc to my method :

@nonobjc func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

This will continue to compile without complaint but you will never get called by the ui actions.

"That's my two cents and I'll be wanting my change back"

The role of #ifdef and #ifndef

Text inside an ifdef/endif or ifndef/endif pair will be left in or removed by the pre-processor depending on the condition. ifdef means "if the following is defined" while ifndef means "if the following is not defined".

So:

#define one 0
#ifdef one
    printf("one is defined ");
#endif
#ifndef one
    printf("one is not defined ");
#endif

is equivalent to:

printf("one is defined ");

since one is defined so the ifdef is true and the ifndef is false. It doesn't matter what it's defined as. A similar (better in my opinion) piece of code to that would be:

#define one 0
#ifdef one
    printf("one is defined ");
#else
    printf("one is not defined ");
#endif

since that specifies the intent more clearly in this particular situation.

In your particular case, the text after the ifdef is not removed since one is defined. The text after the ifndef is removed for the same reason. There will need to be two closing endif lines at some point and the first will cause lines to start being included again, as follows:

     #define one 0
+--- #ifdef one
|    printf("one is defined ");     // Everything in here is included.
| +- #ifndef one
| |  printf("one is not defined "); // Everything in here is excluded.
| |  :
| +- #endif
|    :                              // Everything in here is included again.
+--- #endif

What is the best way to search the Long datatype within an Oracle database?

Example:

create table longtable(id number,text long);

insert into longtable values(1,'hello world');
insert into longtable values(2,'say hello!');

commit;

create or replace function search_long(r rowid) return varchar2 is
temporary_varchar varchar2(4000);
begin
select text into temporary_varchar from longtable where rowid=r;
return temporary_varchar;
end;
/


SQL> select text from longtable where search_long(rowid) like '%hello%';                                                                              

TEXT
--------------------------------------------------------------------------------
hello world
say hello!

But be careful. A PL/SQL function will only search the first 32K of LONG.

Does a finally block always get executed in Java?

Yes, finally will be called after the execution of the try or catch code blocks.

The only times finally won't be called are:

If you invoke System.exit()
If you invoke Runtime.getRuntime().halt(exitStatus)
If the JVM crashes first
If the JVM reaches an infinite loop (or some other non-interruptable, non-terminating statement) in the try or catch block
If the OS forcibly terminates the JVM process; e.g., kill -9 <pid> on UNIX
If the host system dies; e.g., power failure, hardware error, OS panic, et cetera
If the finally block is going to be executed by a daemon thread and all other non-daemon threads exit before finally is called

Laravel 5.4 create model, controller and migration in single artisan command

php artisan make:model PurchaseRequest -crm

The Result is

Model created successfully.
Created Migration: 2018_11_11_011541_create_purchase_requests_table
Controller created successfully.

Just use -crm instead of -mcr

How do you execute SQL from within a bash script?

I'm slightly confused. You should be able to call sqlplus from within the bash script. This may be what you were doing with your first statement

Try Executing the following within your bash script:

#!/bin/bash          
echo Start Executing SQL commands
sqlplus <user>/<password> @file-with-sql-1.sql
sqlplus <user>/<password> @file-with-sql-2.sql

If you want to be able to pass data into your scripts you can do it via SQLPlus by passing arguments into the script:

Contents of file-with-sql-1.sql

 select * from users where username='&1';

Then change the bash script to call sqlplus passing in the value

#!/bin/bash

MY_USER=bob
sqlplus <user>/<password> @file-with-sql-1.sql $MY_USER

Mapping many-to-many association table with extra column(s)

Since the SERVICE_USER table is not a pure join table, but has additional functional fields (blocked), you must map it as an entity, and decompose the many to many association between User and Service into two OneToMany associations : One User has many UserServices, and one Service has many UserServices.

You haven't shown us the most important part : the mapping and initialization of the relationships between your entities (i.e. the part you have problems with). So I'll show you how it should look like.

If you make the relationships bidirectional, you should thus have

class User {
    @OneToMany(mappedBy = "user")
    private Set<UserService> userServices = new HashSet<UserService>();
}

class UserService {
    @ManyToOne
    @JoinColumn(name = "user_id")
    private User user;

    @ManyToOne
    @JoinColumn(name = "service_code")
    private Service service;

    @Column(name = "blocked")
    private boolean blocked;
}

class Service {
    @OneToMany(mappedBy = "service")
    private Set<UserService> userServices = new HashSet<UserService>();
}

If you don't put any cascade on your relationships, then you must persist/save all the entities. Although only the owning side of the relationship (here, the UserService side) must be initialized, it's also a good practice to make sure both sides are in coherence.

User user = new User();
Service service = new Service();
UserService userService = new UserService();

user.addUserService(userService);
userService.setUser(user);

service.addUserService(userService);
userService.setService(service);

session.save(user);
session.save(service);
session.save(userService);

Refresh (reload) a page once using jQuery?

For refreshing page with javascript, you can simply use:

location.reload();

Variable declaration in a header file

The key is to keep the declarations of the variable in the header file and source file the same.

I use this trick

------sample.c------
#define sample_c
#include sample.h

(rest of sample .c)

------sample.h------
#ifdef sample_c
#define EXTERN
#else
#define EXTERN extern
#endif

EXTERN int x;

Sample.c is only compiled once and it defines the variables. Any file that includes sample.h is only given the "extern" of the variable; it does allocate space for that variable.

When you change the type of x, it will change for everybody. You won't need to remember to change it in the source file and the header file.

Display date/time in user's locale format and time offset

The .getTimezoneOffset() method reports the time-zone offset in minutes, counting "westwards" from the GMT/UTC timezone, resulting in an offset value that is negative to what one is commonly accustomed to. (Example, New York time would be reported to be +240 minutes or +4 hours)

To the get a normal time-zone offset in hours, you need to use:

var timeOffsetInHours = -(new Date()).getTimezoneOffset()/60

Important detail:
Note that daylight savings time is factored into the result - so what this method gives you is really the time offset - not the actual geographic time-zone offset.

How to send email to multiple recipients with addresses stored in Excel?

You have to loop through every cell in the range "D3:D6" and construct your To string. Simply assigning it to a variant will not solve the purpose. EmailTo becomes an array if you assign the range directly to it. You can do this as well but then you will have to loop through the array to create your To string

Is this what you are trying? (TRIED AND TESTED)

Option Explicit

Sub Mail_workbook_Outlook_1()
     'Working in 2000-2010
     'This example send the last saved version of the Activeworkbook
    Dim OutApp As Object
    Dim OutMail As Object
    Dim emailRng As Range, cl As Range
    Dim sTo As String

    Set emailRng = Worksheets("Selections").Range("D3:D6")

    For Each cl In emailRng 
        sTo = sTo & ";" & cl.Value
    Next

    sTo = Mid(sTo, 2)

    Set OutApp = CreateObject("Outlook.Application")
    Set OutMail = OutApp.CreateItem(0)

    On Error Resume Next
    With OutMail
        .To = sTo
        .CC = "[email protected];[email protected]"
        .BCC = ""
        .Subject = "RMA #" & Worksheets("RMA").Range("E1")
        .Body = "Attached to this email is RMA #" & _
        Worksheets("RMA").Range("E1") & _
        ". Please follow the instructions for your department included in this form."
        .Attachments.Add ActiveWorkbook.FullName
         'You can add other files also like this
         '.Attachments.Add ("C:\test.txt")

        .Display
    End With
    On Error GoTo 0

    Set OutMail = Nothing
    Set OutApp = Nothing
End Sub

I have never set any passwords to my keystore and alias, so how are they created?

when we run application in eclipse apk generate is sign by default Keystore which is provided by android .

But if you want to upload your application on play store you need to create your own keystore. Eclipse already provides GUI interface to create new keystore. And you also can create keystore through command line.

default alias is

androiddebugkey

How to convert a string of numbers to an array of numbers?

You can transform array of strings to array of numbers in one line:

const arrayOfNumbers = arrayOfStrings.map(e => +e);

How to read until EOF from cin in C++

After researching KeithB's solution using std::istream_iterator, I discovered the std:istreambuf_iterator.

Test program to read all piped input into a string, then write it out again:

#include <iostream>
#include <iterator>
#include <string>

int main()
{
  std::istreambuf_iterator<char> begin(std::cin), end;
  std::string s(begin, end);
  std::cout << s;
}

HTML5 Canvas: Zooming

Just try this out:

<!DOCTYPE HTML>
<html>
    <head>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
        <style>
            body {
                margin: 0px;
                padding: 0px;
            }

            #wrapper {
                position: relative;
                border: 1px solid #9C9898;
                width: 578px;
                height: 200px;
            }

            #buttonWrapper {
                position: absolute;
                width: 30px;
                top: 2px;
                right: 2px;
            }

            input[type =
            "button"] {
                padding: 5px;
                width: 30px;
                margin: 0px 0px 2px 0px;
            }
        </style>
        <script>
            function draw(scale, translatePos){
                var canvas = document.getElementById("myCanvas");
                var context = canvas.getContext("2d");

                // clear canvas
                context.clearRect(0, 0, canvas.width, canvas.height);

                context.save();
                context.translate(translatePos.x, translatePos.y);
                context.scale(scale, scale);
                context.beginPath(); // begin custom shape
                context.moveTo(-119, -20);
                context.bezierCurveTo(-159, 0, -159, 50, -59, 50);
                context.bezierCurveTo(-39, 80, 31, 80, 51, 50);
                context.bezierCurveTo(131, 50, 131, 20, 101, 0);
                context.bezierCurveTo(141, -60, 81, -70, 51, -50);
                context.bezierCurveTo(31, -95, -39, -80, -39, -50);
                context.bezierCurveTo(-89, -95, -139, -80, -119, -20);
                context.closePath(); // complete custom shape
                var grd = context.createLinearGradient(-59, -100, 81, 100);
                grd.addColorStop(0, "#8ED6FF"); // light blue
                grd.addColorStop(1, "#004CB3"); // dark blue
                context.fillStyle = grd;
                context.fill();

                context.lineWidth = 5;
                context.strokeStyle = "#0000ff";
                context.stroke();
                context.restore();
            }

            window.onload = function(){
                var canvas = document.getElementById("myCanvas");

                var translatePos = {
                    x: canvas.width / 2,
                    y: canvas.height / 2
                };

                var scale = 1.0;
                var scaleMultiplier = 0.8;
                var startDragOffset = {};
                var mouseDown = false;

                // add button event listeners
                document.getElementById("plus").addEventListener("click", function(){
                    scale /= scaleMultiplier;
                    draw(scale, translatePos);
                }, false);

                document.getElementById("minus").addEventListener("click", function(){
                    scale *= scaleMultiplier;
                    draw(scale, translatePos);
                }, false);

                // add event listeners to handle screen drag
                canvas.addEventListener("mousedown", function(evt){
                    mouseDown = true;
                    startDragOffset.x = evt.clientX - translatePos.x;
                    startDragOffset.y = evt.clientY - translatePos.y;
                });

                canvas.addEventListener("mouseup", function(evt){
                    mouseDown = false;
                });

                canvas.addEventListener("mouseover", function(evt){
                    mouseDown = false;
                });

                canvas.addEventListener("mouseout", function(evt){
                    mouseDown = false;
                });

                canvas.addEventListener("mousemove", function(evt){
                    if (mouseDown) {
                        translatePos.x = evt.clientX - startDragOffset.x;
                        translatePos.y = evt.clientY - startDragOffset.y;
                        draw(scale, translatePos);
                    }
                });

                draw(scale, translatePos);
            };



            jQuery(document).ready(function(){
               $("#wrapper").mouseover(function(e){
                  $('#status').html(e.pageX +', '+ e.pageY);
               }); 
            })  
        </script>
    </head>
    <body onmousedown="return false;">
        <div id="wrapper">
            <canvas id="myCanvas" width="578" height="200">
            </canvas>
            <div id="buttonWrapper">
                <input type="button" id="plus" value="+"><input type="button" id="minus" value="-">
            </div>
        </div>
        <h2 id="status">
        0, 0
        </h2>
    </body>
</html>

Works perfect for me with zooming and mouse movement.. you can customize it to mouse wheel up & down Njoy!!!

Here is fiddle for this Fiddle

How to send a JSON object using html form data

I found a way to pass a JSON message using only a HTML form.

This example is for GraphQL but it will work for any endpoint that is expecting a JSON message.

GrapqhQL by default expects a parameter called operations where you can add your query or mutation in JSON format. In this specific case I am invoking this query which is requesting to get allUsers and return the userId of each user.

{ 
 allUsers 
  { 
  userId 
  }
}

I am using a text input to demonstrate how to use it, but you can change it for a hidden input to hide the query from the user.

<html>
<body>
    <form method="post" action="http://localhost:8080/graphql">
        <input type="text" name="operations" value="{&quot;query&quot;: &quot;{ allUsers { userId } }&quot;, "variables":  {}}"/>
        <input type="submit" />
    </form>
</body>
</html>

In order to make this dynamic you will need JS to transport the values of the text fields to the query string before submitting your form. Anyway I found this approach very interesting. Hope it helps.

C - The %x format specifier

The format string attack on printf you mentioned isn't specific to the "%x" formatting - in any case where printf has more formatting parameters than passed variables, it will read values from the stack that do not belong to it. You will get the same issue with %d for example. %x is useful when you want to see those values as hex.

As explained in previous answers, %08x will produce a 8 digits hex number, padded by preceding zeros.

Using the formatting in your code example in printf, with no additional parameters:

printf ("%08x %08x %08x %08x");

Will fetch 4 parameters from the stack and display them as 8-digits padded hex numbers.

Outputting data from unit test in Python

I don't think this is quite what your looking for, there's no way to display variable values that don't fail, but this may help you get closer to outputting the results the way you want.

You can use the TestResult object returned by the TestRunner.run() for results analysis and processing. Particularly, TestResult.errors and TestResult.failures

About the TestResults Object:

http://docs.python.org/library/unittest.html#id3

And some code to point you in the right direction:

>>> import random
>>> import unittest
>>>
>>> class TestSequenceFunctions(unittest.TestCase):
...     def setUp(self):
...         self.seq = range(5)
...     def testshuffle(self):
...         # make sure the shuffled sequence does not lose any elements
...         random.shuffle(self.seq)
...         self.seq.sort()
...         self.assertEqual(self.seq, range(10))
...     def testchoice(self):
...         element = random.choice(self.seq)
...         error_test = 1/0
...         self.assert_(element in self.seq)
...     def testsample(self):
...         self.assertRaises(ValueError, random.sample, self.seq, 20)
...         for element in random.sample(self.seq, 5):
...             self.assert_(element in self.seq)
...
>>> suite = unittest.TestLoader().loadTestsFromTestCase(TestSequenceFunctions)
>>> testResult = unittest.TextTestRunner(verbosity=2).run(suite)
testchoice (__main__.TestSequenceFunctions) ... ERROR
testsample (__main__.TestSequenceFunctions) ... ok
testshuffle (__main__.TestSequenceFunctions) ... FAIL

======================================================================
ERROR: testchoice (__main__.TestSequenceFunctions)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "<stdin>", line 11, in testchoice
ZeroDivisionError: integer division or modulo by zero

======================================================================
FAIL: testshuffle (__main__.TestSequenceFunctions)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "<stdin>", line 8, in testshuffle
AssertionError: [0, 1, 2, 3, 4] != [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

----------------------------------------------------------------------
Ran 3 tests in 0.031s

FAILED (failures=1, errors=1)
>>>
>>> testResult.errors
[(<__main__.TestSequenceFunctions testMethod=testchoice>, 'Traceback (most recent call last):\n  File "<stdin>"
, line 11, in testchoice\nZeroDivisionError: integer division or modulo by zero\n')]
>>>
>>> testResult.failures
[(<__main__.TestSequenceFunctions testMethod=testshuffle>, 'Traceback (most recent call last):\n  File "<stdin>
", line 8, in testshuffle\nAssertionError: [0, 1, 2, 3, 4] != [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n')]
>>>

How can I use UIColorFromRGB in Swift?

Here's a Swift version of that function (for getting a UIColor representation of a UInt value):

func UIColorFromRGB(rgbValue: UInt) -> UIColor {
    return UIColor(
        red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
        green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
        blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
        alpha: CGFloat(1.0)
    )
}

view.backgroundColor = UIColorFromRGB(0x209624)

Indenting code in Sublime text 2?

Select everything, or whatever you want to re-indent and do Alt+ E+L+R. This is really quick and painless.

selecting an entire row based on a variable excel vba

One needs to make sure the space between the variables and '&' sign. Check the image. (Red one showing invalid commands)

The correct solution is

Dim copyToRow: copyToRow = 5      
Rows(copyToRow & ":" & copyToRow).Select

Android Studio - mergeDebugResources exception

This would also happen if there is/are any additional folder/files in resource folder which are not supported by Android.

How to create a jQuery function (a new jQuery method or plugin)?

From the Docs:

(function( $ ){
   $.fn.myfunction = function() {
      alert('hello world');
      return this;
   }; 
})( jQuery );

Then you do

$('#my_div').myfunction();

How to find the Target .exe file of .appref-ms

The app is stored in %LocalAppData% in your %UserProfile%. So the full path could be:

C:\Users\username\AppData\Local\GitHub

Best way to remove an event handler in jQuery?

if you set the onclick via html you need to removeAttr ($(this).removeAttr('onclick'))

if you set it via jquery (as the after the first click in my examples above) then you need to unbind($(this).unbind('click'))

Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server."

answer for me was to fix a gridview control which contained a template field that had a dropdownlist which was loaded with a monstrous amount of selectable items- i replaced the DDL with a label field whose data is generated from a function. (i was originally going to allow gridview editing, but have switched to allowing edits on a separate panel displaying the DDL for that field for just that record). hope this might help someone.

PHP - iterate on string characters

Step 1: convert the string to an array using the str_split function

$array = str_split($your_string);

Step 2: loop through the newly created array

foreach ($array as $char) {
 echo $char;
}

You can check the PHP docs for more information: str_split

replace anchor text with jquery

Try

$("#link1").text()

to access the text inside your element. The # indicates you're searching by id. You aren't looking for a child element, so you don't need children(). Instead you want to access the text inside the element your jQuery function returns.

Sorting object property by values

many similar and useful functions: https://github.com/shimondoodkin/groupbyfunctions/

function sortobj(obj)
{
    var keys=Object.keys(obj);
    var kva= keys.map(function(k,i)
    {
        return [k,obj[k]];
    });
    kva.sort(function(a,b){
        if(a[1]>b[1]) return -1;if(a[1]<b[1]) return 1;
        return 0
    });
    var o={}
    kva.forEach(function(a){ o[a[0]]=a[1]})
    return o;
}

function sortobjkey(obj,key)
{
    var keys=Object.keys(obj);
    var kva= keys.map(function(k,i)
    {
        return [k,obj[k]];
    });
    kva.sort(function(a,b){
        k=key;      if(a[1][k]>b[1][k]) return -1;if(a[1][k]<b[1][k]) return 1;
        return 0
    });
    var o={}
    kva.forEach(function(a){ o[a[0]]=a[1]})
    return o;
}

Java Replacing multiple different substring in a string at once (or in the most efficient way)

How about using the replaceAll() method?

Count immediate child div elements using jQuery

With the most recent version of jquery, you can use $("#superpics div").children().length.

Adding n hours to a date in Java?

This is another piece of code when your Date object is in Datetime format. The beauty of this code is, If you give more number of hours the date will also update accordingly.

    String myString =  "09:00 12/12/2014";
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm dd/MM/yyyy");
    Date myDateTime = null;

    //Parse your string to SimpleDateFormat
    try
      {
        myDateTime = simpleDateFormat.parse(myString);
      }
    catch (ParseException e)
      {
         e.printStackTrace();
      }
    System.out.println("This is the Actual Date:"+myDateTime);
    Calendar cal = new GregorianCalendar();
    cal.setTime(myDateTime);

    //Adding 21 Hours to your Date
    cal.add(Calendar.HOUR_OF_DAY, 21);
    System.out.println("This is Hours Added Date:"+cal.getTime());

Here is the Output:

    This is the Actual Date:Fri Dec 12 09:00:00 EST 2014
    This is Hours Added Date:Sat Dec 13 06:00:00 EST 2014

What does [STAThread] do?

The STAThreadAttribute is essentially a requirement for the Windows message pump to communicate with COM components. Although core Windows Forms does not use COM, many components of the OS such as system dialogs do use this technology.

MSDN explains the reason in slightly more detail:

STAThreadAttribute indicates that the COM threading model for the application is single-threaded apartment. This attribute must be present on the entry point of any application that uses Windows Forms; if it is omitted, the Windows components might not work correctly. If the attribute is not present, the application uses the multithreaded apartment model, which is not supported for Windows Forms.

This blog post (Why is STAThread required?) also explains the requirement quite well. If you want a more in-depth view as to how the threading model works at the CLR level, see this MSDN Magazine article from June 2004 (Archived, Apr. 2009).

Chart won't update in Excel (2007)

We found a solution that doesn't involve VBA: multiplying some element of the chart's data range by TODAY()-TODAY()+1.

Even though the range was recalculating without this, the volatile nature of TODAY() somehow gives it an extra boost that triggers the chart recalc.

Find the maximum value in a list of tuples in Python

In addition to max, you can also sort:

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

Programs & Examples On #Grape

Pandas group-by and sum

Storing and Retrieving ArrayList values from hashmap

Check if an array contains any element of another array in JavaScript

Change Text Color of Selected Option in a Select Box

Random element from string array

How to grep for contents after pattern?

How to perform a real time search and filter on a HTML table

How to remove all elements in String array in java?

Accessing elements of Python dictionary by index

How do I create a comma-separated list from an array in PHP?

How do I pick 2 random items from a Python set?

Using Python's list index() method on a list of tuples or objects?

Hide axis values but keep axis tick labels in matplotlib

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Tkinter: "Python may not be configured for Tk"

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Using SSIS BIDS with Visual Studio 2012 / 2013

Binary Data in JSON String. Something better than Base64

Is there a query language for JSON?

jq syntax extends JSON syntax

Select info from table where row has max date

How to check that Request.QueryString has a specific value or not in ASP.NET?

How to view/delete local storage in Firefox?

Firebug Method

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Storage Inspector Method

How do I setup a SSL certificate for an express.js server?

remote rejected master -> master (pre-receive hook declined)

How can I use custom fonts on a website?

What exactly is the function of Application.CutCopyMode property in Excel

HTML table headers always visible at top of window when viewing a large table

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Failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED

Mapping US zip code to time zone

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set the iframe height automatically

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IIS7 Permissions Overview - ApplicationPoolIdentity

ImageMagick security policy 'PDF' blocking conversion

How do I trap ctrl-c (SIGINT) in a C# console app

What is the equivalent of "none" in django templates?

What is the correct Performance Counter to get CPU and Memory Usage of a Process?

VBA Print to PDF and Save with Automatic File Name

How to create Password Field in Model Django

MYSQL Truncated incorrect DOUBLE value

IIS 7, HttpHandler and HTTP Error 500.21

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fetch in git doesn't get all branches

Javascript - validation, numbers only

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jQuery Approach

In Java how does one turn a String into a char or a char into a String?

Select first 10 distinct rows in mysql

Can an AJAX response set a cookie?

Can Mockito stub a method without regard to the argument?

Finding index of character in Swift String

Turn Pandas Multi-Index into column

What is HTML5 ARIA?

UITextView that expands to text using auto layout

Python Function to test ping

LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria

Ways to eliminate switch in code

How to generate a create table script for an existing table in phpmyadmin?

Mysqladmin can do the job of saving out the create table script.

How to add a named sheet at the end of all Excel sheets?

Convert a hexadecimal string to an integer efficiently in C?

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