Saving binary data as file using JavaScript from a browser

Try

_x000D_

let bytes = [65,108,105,99,101,39,115,32,65,100,118,101,110,116,117,114,101];_x000D_
_x000D_
let base64data = btoa(String.fromCharCode.apply(null, bytes));_x000D_
_x000D_
let a = document.createElement('a');_x000D_
a.href = 'data:;base64,' + base64data;_x000D_
a.download = 'binFile.txt'; _x000D_
a.click();

_x000D_

I convert here binary data to base64 (for bigger data conversion use this) - during downloading browser decode it automatically and save raw data in file. 2020.06.14 I upgrade Chrome to 83.0 and above SO snippet stop working (probably due to sandbox security restrictions) - but JSFiddle version works - here

Using curl POST with variables defined in bash script functions

Here's what actually worked for me, after guidance from answers here:

export BASH_VARIABLE="[1,2,3]"
curl http://localhost:8080/path -d "$(cat <<EOF
{
  "name": $BASH_VARIABLE,
  "something": [
    "value1",
    "value2",
    "value3"
  ]
}
EOF
)" -H 'Content-Type: application/json'

Excel VBA Code: Compile Error in x64 Version ('PtrSafe' attribute required)

I think all you need to do for your function is just add PtrSafe: i.e. the first line of your first function should look like this:

Private Declare PtrSafe Function swe_azalt Lib "swedll32.dll" ......

what does this mean ? image/png;base64?

It's an inlined image (png), encoded in base64. It can make a page faster: the browser doesn't have to query the server for the image data separately, saving a round trip.

(It can also make it slower if abused: these resources are not cached, so the bytes are included in each page load.)

What does (function($) {})(jQuery); mean?

Type 3, in order to work would have to look like this:

(function($){
    //Attach this new method to jQuery
    $.fn.extend({     
        //This is where you write your plugin's name
        'pluginname': function(_options) {
            // Put defaults inline, no need for another variable...
            var options =  $.extend({
                'defaults': "go here..."
            }, _options);

            //Iterate over the current set of matched elements
            return this.each(function() {

                //code to be inserted here

            });
        }
    }); 
})(jQuery);

I am unsure why someone would use extend over just directly setting the property in the jQuery prototype, it is doing the same exact thing only in more operations and more clutter.

Display an array in a readable/hierarchical format

if someone needs to view arrays so cool ;) use this method.. this will print to your browser console

function console($obj)
{
    $js = json_encode($obj);
    print_r('<script>console.log('.$js.')</script>');
}

you can use like this..

console($myObject);

Output will be like this.. so cool eh !!

Handling JSON Post Request in Go

You need to read from req.Body. The ParseForm method is reading from the req.Body and then parsing it in standard HTTP encoded format. What you want is to read the body and parse it in JSON format.

Here's your code updated.

package main

import (
    "encoding/json"
    "log"
    "net/http"
    "io/ioutil"
)

type test_struct struct {
    Test string
}

func test(rw http.ResponseWriter, req *http.Request) {
    body, err := ioutil.ReadAll(req.Body)
    if err != nil {
        panic(err)
    }
    log.Println(string(body))
    var t test_struct
    err = json.Unmarshal(body, &t)
    if err != nil {
        panic(err)
    }
    log.Println(t.Test)
}

func main() {
    http.HandleFunc("/test", test)
    log.Fatal(http.ListenAndServe(":8082", nil))
}

Format number to always show 2 decimal places

var quantity = 12;

var import1 = 12.55;

var total = quantity * import1;

var answer = parseFloat(total).toFixed(2);

document.write(answer);

How to increment a pointer address and pointer's value?

        Note:
        1) Both ++ and * have same precedence(priority), so the associativity comes into picture.
        2) in this case Associativity is from **Right-Left**

        important table to remember in case of pointers and arrays: 

        operators           precedence        associativity

    1)  () , []                1               left-right
    2)  *  , identifier        2               right-left
    3)  <data type>            3               ----------

        let me give an example, this might help;

        char **str;
        str = (char **)malloc(sizeof(char*)*2); // allocate mem for 2 char*
        str[0]=(char *)malloc(sizeof(char)*10); // allocate mem for 10 char
        str[1]=(char *)malloc(sizeof(char)*10); // allocate mem for 10 char

        strcpy(str[0],"abcd");  // assigning value
        strcpy(str[1],"efgh");  // assigning value

        while(*str)
        {
            cout<<*str<<endl;   // printing the string
            *str++;             // incrementing the address(pointer)
                                // check above about the prcedence and associativity
        }
        free(str[0]);
        free(str[1]);
        free(str);

Git Checkout warning: unable to unlink files, permission denied

I just had to switch user from ubuntu to my actual user name that I'd first done stuff under. That fixed it.

Copying formula to the next row when inserting a new row

You need to insert the new row and then copy from the source row to the newly inserted row. Excel allows you to paste special just formulas. So in Excel:

Insert the new row
Copy the source row
Select the newly created target row, right click and paste special
Paste as formulas

VBA if required with Rows("1:1") being source and Rows("2:2") being target:

Rows("2:2").Insert Shift:=xlDown, CopyOrigin:=xlFormatFromLeftOrAbove
Rows("2:2").Clear

Rows("1:1").Copy
Rows("2:2").PasteSpecial Paste:=xlPasteFormulas, Operation:=xlNone

How to apply style classes to td classes?

When using with a reactive bootstrap table, i did not find that the

table.classname td {

syntax worked as there was no <table> tag at all. Often modules like this don't use the outer tag but just dive right in maybe using <thead> and <tbody> for grouping at most.

Simply specifying like this worked great though

td.classname {
    max-width: 500px;
    text-overflow: initial;
    white-space: wrap;
    word-wrap: break-word;
}

as it directly overrides the <td> and can be used only on the elements you want to change. Maybe in your case use

thead.medium td {
  font-size: 40px; 
}
tbody.small td {
  font-size:25px;
}

for consistent font sizing with a bigger header.

How to place a JButton at a desired location in a JFrame using Java

I have figured it out lol. for the button do .setBounds(0, 0, 220, 30) The .setBounds layout is like this (int x, int y, int width, int height)

How to test an Internet connection with bash?

Checking Google's index page is another way to do it:

#!/bin/bash

WGET="/usr/bin/wget"

$WGET -q --tries=20 --timeout=10 http://www.google.com -O /tmp/google.idx &> /dev/null
if [ ! -s /tmp/google.idx ]
then
    echo "Not Connected..!"
else
    echo "Connected..!"
fi

How can I execute Shell script in Jenkinsfile?

There's the Managed Script Plugin which provides an easy way of managing user scripts. It also adds a build step action which allows you to select which user script to execute.

Adding onClick event dynamically using jQuery

Or you can use an arrow function to define it:

$(document).ready(() => {
  $('#bfCaptchaEntry').click(()=>{
    
  });
});

For better browser support:

$(document).ready(function() {
  $('#bfCaptchaEntry').click(function (){
    
  });
});

Linq to SQL how to do "where [column] in (list of values)"

Here is how I do it by using HashSet

        HashSet<String> hs = new HashSet<string>(new String[] { "Pluto", "Earth", "Neptune" });
        String[] arr =
        {
            "Pluto",
            "Earth",
            "Neptune",
            "Jupiter",
            "Saturn",
            "Mercury",
            "Pluto",
            "Earth",
            "Neptune",
            "Jupiter",
            "Saturn",
            "Mercury",
            // etc.
        };
        ICollection<String> coll = arr;

        String[] arrStrFiltered = coll.Where(str => hs.Contains(str)).ToArray();

HashSet is basically almost to O(1) so your complexity remains O(n).

Why does Java's hashCode() in String use 31 as a multiplier?

You can read Bloch's original reasoning under "Comments" in http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4045622. He investigated the performance of different hash functions in regards to the resulting "average chain size" in a hash table. P(31) was one of the common functions during that time which he found in K&R's book (but even Kernighan and Ritchie couldn't remember where it came from). In the end he basically had to choose one and so he took P(31) since it seemed to perform well enough. Even though P(33) was not really worse and multiplication by 33 is equally fast to calculate (just a shift by 5 and an addition), he opted for 31 since 33 is not a prime:

Of the remaining four, I'd probably select P(31), as it's the cheapest to calculate on a RISC machine (because 31 is the difference of two powers of two). P(33) is similarly cheap to calculate, but it's performance is marginally worse, and 33 is composite, which makes me a bit nervous.

So the reasoning was not as rational as many of the answers here seem to imply. But we're all good in coming up with rational reasons after gut decisions (and even Bloch might be prone to that).

Parsing arguments to a Java command line program

Use the Apache Commons CLI library commandline.getArgs() to get arg1, arg2, arg3, and arg4. Here is some code:



    import org.apache.commons.cli.CommandLine;
    import org.apache.commons.cli.Option;
    import org.apache.commons.cli.Options;
    import org.apache.commons.cli.Option.Builder;
    import org.apache.commons.cli.CommandLineParser;
    import org.apache.commons.cli.DefaultParser;
    import org.apache.commons.cli.ParseException;

    public static void main(String[] parameters)
    {
        CommandLine commandLine;
        Option option_A = Option.builder("A")
            .required(true)
            .desc("The A option")
            .longOpt("opt3")
            .build();
        Option option_r = Option.builder("r")
            .required(true)
            .desc("The r option")
            .longOpt("opt1")
            .build();
        Option option_S = Option.builder("S")
            .required(true)
            .desc("The S option")
            .longOpt("opt2")
            .build();
        Option option_test = Option.builder()
            .required(true)
            .desc("The test option")
            .longOpt("test")
            .build();
        Options options = new Options();
        CommandLineParser parser = new DefaultParser();

        String[] testArgs =
        { "-r", "opt1", "-S", "opt2", "arg1", "arg2",
          "arg3", "arg4", "--test", "-A", "opt3", };

        options.addOption(option_A);
        options.addOption(option_r);
        options.addOption(option_S);
        options.addOption(option_test);

        try
        {
            commandLine = parser.parse(options, testArgs);

            if (commandLine.hasOption("A"))
            {
                System.out.print("Option A is present.  The value is: ");
                System.out.println(commandLine.getOptionValue("A"));
            }

            if (commandLine.hasOption("r"))
            {
                System.out.print("Option r is present.  The value is: ");
                System.out.println(commandLine.getOptionValue("r"));
            }

            if (commandLine.hasOption("S"))
            {
                System.out.print("Option S is present.  The value is: ");
                System.out.println(commandLine.getOptionValue("S"));
            }

            if (commandLine.hasOption("test"))
            {
                System.out.println("Option test is present.  This is a flag option.");
            }

            {
                String[] remainder = commandLine.getArgs();
                System.out.print("Remaining arguments: ");
                for (String argument : remainder)
                {
                    System.out.print(argument);
                    System.out.print(" ");
                }

                System.out.println();
            }

        }
        catch (ParseException exception)
        {
            System.out.print("Parse error: ");
            System.out.println(exception.getMessage());
        }
    }

USB Debugging option greyed out

Just ran into this on the LG Rebel LTE (LGL44VL). As other answers note, you need to change the USB connection mode to PTP. But my phone's control panels were different from stock Android and didn't have such an option.

The option was hiding in a notification that appeared when I plugged the phone in. I had to open the notification tray and tap a notification labeled

Media Device (MTP)
Tap here for more USB options

What is the dual table in Oracle?

It's a object to put in the from that return 1 empty row. For example: select 1 from dual; returns 1

select 21+44 from dual; returns 65

select [sequence].nextval from dual; returns the next value from the sequence.

UPDATE multiple tables in MySQL using LEFT JOIN

Table A 
+--------+-----------+
| A-num  | text      | 
|    1   |           |
|    2   |           |
|    3   |           |
|    4   |           |
|    5   |           |
+--------+-----------+

Table B
+------+------+--------------+
| B-num|  date        |  A-num | 
|  22  |  01.08.2003  |     2  |
|  23  |  02.08.2003  |     2  | 
|  24  |  03.08.2003  |     1  |
|  25  |  04.08.2003  |     4  |
|  26  |  05.03.2003  |     4  |

I will update field text in table A with

UPDATE `Table A`,`Table B`
SET `Table A`.`text`=concat_ws('',`Table A`.`text`,`Table B`.`B-num`," from                                           
",`Table B`.`date`,'/')
WHERE `Table A`.`A-num` = `Table B`.`A-num`

and come to this result:

Table A 
+--------+------------------------+
| A-num  | text                   | 
|    1   |  24 from 03 08 2003 /  |
|    2   |  22 from 01 08 2003 /  |       
|    3   |                        |
|    4   |  25 from 04 08 2003 /  |
|    5   |                        |
--------+-------------------------+

where only one field from Table B is accepted, but I will come to this result:

Table A 
+--------+--------------------------------------------+
| A-num  | text                                       | 
|    1   |  24 from 03 08 2003                        |
|    2   |  22 from 01 08 2003 / 23 from 02 08 2003 / |       
|    3   |                                            |
|    4   |  25 from 04 08 2003 / 26 from 05 03 2003 / |
|    5   |                                            |
+--------+--------------------------------------------+

How to use subList()

I've implemented and tested this one; it should cover most bases:

public static <T> List<T> safeSubList(List<T> list, int fromIndex, int toIndex) {
    int size = list.size();
    if (fromIndex >= size || toIndex <= 0 || fromIndex >= toIndex) {
        return Collections.emptyList();
    }

    fromIndex = Math.max(0, fromIndex);
    toIndex = Math.min(size, toIndex);

    return list.subList(fromIndex, toIndex);
}

How to list the size of each file and directory and sort by descending size in Bash?

ls -S sorts by size. Then, to show the size too, ls -lS gives a long (-l), sorted by size (-S) display. I usually add -h too, to make things easier to read, so, ls -lhS.

How to access elements of a JArray (or iterate over them)

Update - I verified the below works. Maybe the creation of your JArray isn't quite right.

[TestMethod]
    public void TestJson()
    {
        var jsonString = @"{""trends"": [
              {
                ""name"": ""Croke Park II"",
                ""url"": ""http://twitter.com/search?q=%22Croke+Park+II%22"",
                ""promoted_content"": null,
                ""query"": ""%22Croke+Park+II%22"",
                ""events"": null
              },
              {
                ""name"": ""Siptu"",
                ""url"": ""http://twitter.com/search?q=Siptu"",
                ""promoted_content"": null,
                ""query"": ""Siptu"",
                ""events"": null
              },
              {
                ""name"": ""#HNCJ"",
                ""url"": ""http://twitter.com/search?q=%23HNCJ"",
                ""promoted_content"": null,
                ""query"": ""%23HNCJ"",
                ""events"": null
              },
              {
                ""name"": ""Boston"",
                ""url"": ""http://twitter.com/search?q=Boston"",
                ""promoted_content"": null,
                ""query"": ""Boston"",
                ""events"": null
              },
              {
                ""name"": ""#prayforboston"",
                ""url"": ""http://twitter.com/search?q=%23prayforboston"",
                ""promoted_content"": null,
                ""query"": ""%23prayforboston"",
                ""events"": null
              },
              {
                ""name"": ""#TheMrsCarterShow"",
                ""url"": ""http://twitter.com/search?q=%23TheMrsCarterShow"",
                ""promoted_content"": null,
                ""query"": ""%23TheMrsCarterShow"",
                ""events"": null
              },
              {
                ""name"": ""#Raw"",
                ""url"": ""http://twitter.com/search?q=%23Raw"",
                ""promoted_content"": null,
                ""query"": ""%23Raw"",
                ""events"": null
              },
              {
                ""name"": ""Iran"",
                ""url"": ""http://twitter.com/search?q=Iran"",
                ""promoted_content"": null,
                ""query"": ""Iran"",
                ""events"": null
              },
              {
                ""name"": ""#gaa"",
                ""url"": ""http://twitter.com/search?q=%23gaa"",
                ""promoted_content"": null,
                ""query"": ""gaa"",
                ""events"": null
              },
              {
                ""name"": ""Facebook"",
                ""url"": ""http://twitter.com/search?q=Facebook"",
                ""promoted_content"": null,
                ""query"": ""Facebook"",
                ""events"": null
              }]}";

        var twitterObject = JToken.Parse(jsonString);
        var trendsArray = twitterObject.Children<JProperty>().FirstOrDefault(x => x.Name == "trends").Value;


        foreach (var item in trendsArray.Children())
        {
            var itemProperties = item.Children<JProperty>();
            //you could do a foreach or a linq here depending on what you need to do exactly with the value
            var myElement = itemProperties.FirstOrDefault(x => x.Name == "url");
            var myElementValue = myElement.Value; ////This is a JValue type
        }
    }

So call Children on your JArray to get each JObject in JArray. Call Children on each JObject to access the objects properties.

foreach(var item in yourJArray.Children())
{
    var itemProperties = item.Children<JProperty>();
    //you could do a foreach or a linq here depending on what you need to do exactly with the value
    var myElement = itemProperties.FirstOrDefault(x => x.Name == "url");
    var myElementValue = myElement.Value; ////This is a JValue type
}

How to check if a std::thread is still running?

If you are willing to make use of C++11 std::async and std::future for running your tasks, then you can utilize the wait_for function of std::future to check if the thread is still running in a neat way like this:

#include <future>
#include <thread>
#include <chrono>
#include <iostream>

int main() {
    using namespace std::chrono_literals;

    /* Run some task on new thread. The launch policy std::launch::async
       makes sure that the task is run asynchronously on a new thread. */
    auto future = std::async(std::launch::async, [] {
        std::this_thread::sleep_for(3s);
        return 8;
    });

    // Use wait_for() with zero milliseconds to check thread status.
    auto status = future.wait_for(0ms);

    // Print status.
    if (status == std::future_status::ready) {
        std::cout << "Thread finished" << std::endl;
    } else {
        std::cout << "Thread still running" << std::endl;
    }

    auto result = future.get(); // Get result.
}

If you must use std::thread then you can use std::promise to get a future object:

#include <future>
#include <thread>
#include <chrono>
#include <iostream>

int main() {
    using namespace std::chrono_literals;

    // Create a promise and get its future.
    std::promise<bool> p;
    auto future = p.get_future();

    // Run some task on a new thread.
    std::thread t([&p] {
        std::this_thread::sleep_for(3s);
        p.set_value(true); // Is done atomically.
    });

    // Get thread status using wait_for as before.
    auto status = future.wait_for(0ms);

    // Print status.
    if (status == std::future_status::ready) {
        std::cout << "Thread finished" << std::endl;
    } else {
        std::cout << "Thread still running" << std::endl;
    }

    t.join(); // Join thread.
}

Both of these examples will output:

Thread still running

This is of course because the thread status is checked before the task is finished.

But then again, it might be simpler to just do it like others have already mentioned:

#include <thread>
#include <atomic>
#include <chrono>
#include <iostream>

int main() {
    using namespace std::chrono_literals;

    std::atomic<bool> done(false); // Use an atomic flag.

    /* Run some task on a new thread.
       Make sure to set the done flag to true when finished. */
    std::thread t([&done] {
        std::this_thread::sleep_for(3s);
        done = true;
    });

    // Print status.
    if (done) {
        std::cout << "Thread finished" << std::endl;
    } else {
        std::cout << "Thread still running" << std::endl;
    }

    t.join(); // Join thread.
}

Edit:

There's also the std::packaged_task for use with std::thread for a cleaner solution than using std::promise:

#include <future>
#include <thread>
#include <chrono>
#include <iostream>

int main() {
    using namespace std::chrono_literals;

    // Create a packaged_task using some task and get its future.
    std::packaged_task<void()> task([] {
        std::this_thread::sleep_for(3s);
    });
    auto future = task.get_future();

    // Run task on new thread.
    std::thread t(std::move(task));

    // Get thread status using wait_for as before.
    auto status = future.wait_for(0ms);

    // Print status.
    if (status == std::future_status::ready) {
        // ...
    }

    t.join(); // Join thread.
}

Error 1920 service failed to start. Verify that you have sufficient privileges to start system services

In my case I had to delete the services in my installshield project and start from square one. My original service components were added manually and I couldn't get them working, the only error I was getting was the same "Error 1920 service failed to start. Verify that you have sufficient privileges to start system services." that you were getting. After deleting my components, I re-added them using the component wizard.

I actually had to create two new components. One was of type "Install Service".

The other component I had to add was of "Control Service" type.

I had to choose the service that I had setup when I added the Install Service component.

After that it worked, even though nothing looked differently from the components I had added manually. Installshield must do something behind the scenes when it wires up the service components with the component wizard.

All of this was with Install Shield 2016.

Convert a string to a double - is this possible?

For arbitrary precision mathematics PHP offers the Binary Calculator which supports numbers of any size and precision, represented as strings.

$s = '1234.13';
$double = bcadd($s,'0',2);

PHP: bcadd

How do you stop tracking a remote branch in Git?

git branch --unset-upstream stops tracking all the local branches, which is not desirable.

Remove the [branch "branch-name"] section from the .git/config file followed by

git branch -D 'branch-name' && git branch -D -r 'origin/branch-name'

works out the best for me.

jQuery 'each' loop with JSON array

Brief code but full-featured

The following is a hybrid jQuery solution that formats each data "record" into an HTML element and uses the data's properties as HTML attribute values.

The jquery each runs the inner loop; I needed the regular JavaScript for on the outer loop to be able to grab the property name (instead of value) for display as the heading. According to taste it can be modified for slightly different behaviour.

This is only 5 main lines of code but wrapped onto multiple lines for display:

$.get("data.php", function(data){

    for (var propTitle in data) {

        $('<div></div>') 
            .addClass('heading')
            .insertBefore('#contentHere')
            .text(propTitle);

            $(data[propTitle]).each(function(iRec, oRec) {

                $('<div></div>')
                    .addClass(oRec.textType)
                    .attr('id', 'T'+oRec.textId)
                    .insertBefore('#contentHere')
                    .text(oRec.text);
            });
    }

});

Produces the output

(Note: I modified the JSON data text values by prepending a number to ensure I was displaying the proper records in the proper sequence - while "debugging")

<div class="heading">
    justIn
</div>
<div id="T123" class="Greeting">
    1Hello
</div>
<div id="T514" class="Question">
    1What's up?
</div>
<div id="T122" class="Order">
    1Come over here
</div>
<div class="heading">
    recent
</div>
<div id="T1255" class="Greeting">
    2Hello
</div>
<div id="T6564" class="Question">
    2What's up?
</div>
<div id="T0192" class="Order">
    2Come over here
</div>
<div class="heading">
    old
</div>
<div id="T5213" class="Greeting">
    3Hello
</div>
<div id="T9758" class="Question">
    3What's up?
</div>
<div id="T7655" class="Order">
    3Come over here
</div>
<div id="contentHere"></div>

Apply a style sheet

<style>
.heading { font-size: 24px; text-decoration:underline }
.Greeting { color: green; }
.Question { color: blue; }
.Order { color: red; }
</style>

to get a "beautiful" looking set of data

More Info
The JSON data was used in the following way:

for each category (key name the array is held under):

the key name is used as the section heading (e.g. justIn)

for each object held inside an array:

'text' becomes the content of a div
'textType' becomes the class of the div (hooked into a style sheet)
'textId' becomes the id of the div
e.g. <div id="T122" class="Order">Come over here</div>

How do you stylize a font in Swift?

I am assuming this is a custom font. For any custom font this is what you do.

First download and add your font files to your project in Xcode (The files should appear as well in “Target -> Build Phases -> Copy Bundle Resources”).
In your Info.plist file add the key “Fonts provided by application” with type “Array”.
For each font you want to add to your project, create an item for the array you have created with the full name of the file including its extension (e.g. HelveticaNeue-UltraLight.ttf). Save your “Info.plist” file.

label.font = UIFont (name: "HelveticaNeue-UltraLight", size: 30)

Delete the 'first' record from a table in SQL Server, without a WHERE condition

WITH  q AS
        (
        SELECT TOP 1 *
        FROM    mytable
        /* You may want to add ORDER BY here */
        )
DELETE
FROM    q

Note that

DELETE TOP (1)
FROM   mytable

will also work, but, as stated in the documentation:

The rows referenced in the TOP expression used with INSERT, UPDATE, or DELETE are not arranged in any order.

Therefore, it's better to use WITH and an ORDER BY clause, which will let you specify more exactly which row you consider to be the first.

Padding between ActionBar's home icon and title

I had a similar issue but with spacing between the up and the custom app icon/logo in the action bar. Dushyanth's solution of setting padding programatically worked for me (setting padding on app/logo icon). I tried to find either android.R.id.home or R.id.abs__home (ActionBarSherlock only, as this ensures backwards compatibility), and it seems to work across 2.3-4.3 devices I've tested on.

cocoapods - 'pod install' takes forever

I had the same issue. After running

pod install
Setting up CocoaPods master repo

The iterm2 was stuck on Setting up CocoaPods.

I solved the issue by running

sudo gem install CocoaPods

This is mentioned in the CocoaPods website

Add day(s) to a Date object

date.setTime( date.getTime() + days * 86400000 );

How to insert a value that contains an apostrophe (single quote)?

You need to escape the apostrophe. In T-SQL this is with a double apostrophe, so your insert statement becomes:

Insert into Person
(First, Last)
Values
'Joe', 'O''Brien'

C# Public Enums in Classes

You need to define the enum outside of the class.

public enum card_suits
{
    Clubs,
    Hearts,
    Spades,
    Diamonds
}

public class Card
{
     // ...

That being said, you may also want to consider using the standard naming guidelines for Enums, which would be CardSuit instead of card_suits, since Pascal Casing is suggested, and the enum is not marked with the FlagsAttribute, suggesting multiple values are appropriate in a single variable.

Remove an onclick listener

The above answers seem flighty and unreliable. I tried doing this with an ImageView in a simple Relative Layout and it did not disable the onClick event.

What did work for me was using setEnabled.

ImageView v = (ImageView)findViewByID(R.id.layoutV);
v.setEnabled(false);

You can then check whether the View is enabled with:

boolean ImageView.isEnabled();

Another option is to use setContentDescription(String string) and String getContentDescription() to determine the status of a view.

What is the difference between & vs @ and = in angularJS

Not my fiddle, but http://jsfiddle.net/maxisam/QrCXh/ shows the difference. The key piece is:

           scope:{
            /* NOTE: Normally I would set my attributes and bindings
            to be the same name but I wanted to delineate between 
            parent and isolated scope. */                
            isolatedAttributeFoo:'@attributeFoo',
            isolatedBindingFoo:'=bindingFoo',
            isolatedExpressionFoo:'&'
        }

Postman addon's like in firefox

There's a few:

Python - Get path of root project structure

Here's my take on this issue.

I have a simple use-case that bugged me for a while. Tried a few solutions, but I didn't like either of them flexible enough.

So here's what I figured out.

create a blank python file in the root dir -> I call this beacon.py
(assuming that the project root is in the PYTHONPATH so it can be imported)
add a few lines to my module/class which I call here not_in_root.py.
This will import the beacon.py module and get the path to that module

Here's an example project structure

this_project
+-- beacon.py
+-- lv1
¦   +-- __init__.py
¦   +-- lv2
¦       +-- __init__.py
¦       +-- not_in_root.py
...

The content of the not_in_root.py

import os
from pathlib import Path


class Config:
    try:
        import beacon
        print(f"'import beacon' -> {os.path.dirname(os.path.abspath(beacon.__file__))}")  # only for demo purposes
        print(f"'import beacon' -> {Path(beacon.__file__).parent.resolve()}")  # only for demo purposes
    except ModuleNotFoundError as e:
        print(f"ModuleNotFoundError: import beacon failed with {e}. "
              f"Please. create a file called beacon.py and place it to the project root directory.")

    project_root = Path(beacon.__file__).parent.resolve()
    input_dir = project_root / 'input'
    output_dir = project_root / 'output'


if __name__ == '__main__':
    c = Config()
    print(f"Config.project_root: {c.project_root}")
    print(f"Config.input_dir: {c.input_dir}")
    print(f"Config.output_dir: {c.output_dir}")

The output would be

/home/xyz/projects/this_project/venv/bin/python /home/xyz/projects/this_project/lv1/lv2/not_in_root.py
'import beacon' -> /home/xyz/projects/this_project
'import beacon' -> /home/xyz/projects/this_project
Config.project_root: /home/xyz/projects/this_project
Config.input_dir: /home/xyz/projects/this_project/input
Config.output_dir: /home/xyz/projects/this_project/output

Of course, it doesn't need to be called beacon.py nor need to be empty, essentially any python file (importable) file would do as long as it's in the root directory.

Using an empty .py file sort of guarantees that it will not be moved elsewhere due to some future refactoring.

Cheers

Convert String to java.util.Date

It sounds like you may want to use something like SimpleDateFormat. http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html

You declare your date format and then call the parse method with your string.

private static final DateFormat DF = new SimpleDateFormat(...);
Date myDate = DF.parse("1234");

And as Guillaume says, set the timezone!

How do I convert a date/time to epoch time (unix time/seconds since 1970) in Perl?

A filter converting any dates in various ISO-related formats (and who'd use anything else after reading the writings of the Mighty Kuhn?) on standard input to seconds-since-the-epoch time on standard output might serve to illustrate both parts:

martind@whitewater:~$ cat `which isoToEpoch`
#!/usr/bin/perl -w
use strict;
use Time::Piece;
# sudo apt-get install libtime-piece-perl
while (<>) {
  # date --iso=s:
  # 2007-02-15T18:25:42-0800
  # Other matched formats:
  # 2007-02-15 13:50:29 (UTC-0800)
  # 2007-02-15 13:50:29 (UTC-08:00)
  s/(\d{4}-\d{2}-\d{2}([T ])\d{2}:\d{2}:\d{2})(?:\.\d+)? ?(?:\(UTC)?([+\-]\d{2})?:?00\)?/Time::Piece->strptime ($1, "%Y-%m-%d$2%H:%M:%S")->epoch - (defined ($3) ? $3 * 3600 : 0)/eg;
  print;
}
martind@whitewater:~$

Switch statement fallthrough in C#?

You forgot to add the "break;" statement into case 3. In case 2 you wrote it into the if block. Therefore try this:

case 3:            
{
    ans += string.Format("{0} hundred and ", numbers[number / 100]);
    break;
}


case 2:            
{
    int t = (number / 10) % 10;            
    if (t == 1)            
    {                
        ans += teens[number % 10];                
    }            
    else if (t > 1)                
    {
        ans += string.Format("{0}-", tens[t]);        
    }
    break;
}

case 1:            
{
    int o = number % 10;            
    ans += numbers[o];            
    break;        
}

default:            
{
    throw new ArgumentException("number");
}

How to calculate a mod b in Python?

>>> 15 % 4
3
>>>

The modulo gives the remainder after integer division.

How to query values from xml nodes?

This works, been tested...

SELECT  n.c.value('OrganizationReportReferenceIdentifier[1]','varchar(128)') AS 'OrganizationReportReferenceNumber',  
        n.c.value('(OrganizationNumber)[1]','varchar(128)') AS 'OrganizationNumber'
FROM    Batches t
Cross   Apply RawXML.nodes('/GrobXmlFile/Grob/ReportHeader') n(c)

Add placeholder text inside UITextView in Swift?

I am surprised that no one mentioned NSTextStorageDelegate. UITextViewDelegate's methods will only be triggered by user interaction, but not programmatically. E.g. when you set a text view's text property programmatically, you'll have to set the placeholder's visibility yourself, because the delegate methods will not be called.

However, with NSTextStorageDelegate's textStorage(_:didProcessEditing:range:changeInLength:) method, you'll be notified of any change to the text, even if it's done programmatically. Just assign it like this:

textView.textStorage.delegate = self

(In UITextView, this delegate property is nil by default, so it won't affect any default behaviour.)

Combine it with the UILabel technique @clearlight demonstrates, one can easily wrap the whole UITextView's placeholder implementation into an extension.

extension UITextView {

    private class PlaceholderLabel: UILabel { }

    private var placeholderLabel: PlaceholderLabel {
        if let label = subviews.compactMap( { $0 as? PlaceholderLabel }).first {
            return label
        } else {
            let label = PlaceholderLabel(frame: .zero)
            label.font = font
            addSubview(label)
            return label
        }
    }

    @IBInspectable
    var placeholder: String {
        get {
            return subviews.compactMap( { $0 as? PlaceholderLabel }).first?.text ?? ""
        }
        set {
            let placeholderLabel = self.placeholderLabel
            placeholderLabel.text = newValue
            placeholderLabel.numberOfLines = 0
            let width = frame.width - textContainer.lineFragmentPadding * 2
            let size = placeholderLabel.sizeThatFits(CGSize(width: width, height: .greatestFiniteMagnitude))
            placeholderLabel.frame.size.height = size.height
            placeholderLabel.frame.size.width = width
            placeholderLabel.frame.origin = CGPoint(x: textContainer.lineFragmentPadding, y: textContainerInset.top)

            textStorage.delegate = self
        }
    }

}

extension UITextView: NSTextStorageDelegate {

    public func textStorage(_ textStorage: NSTextStorage, didProcessEditing editedMask: NSTextStorageEditActions, range editedRange: NSRange, changeInLength delta: Int) {
        if editedMask.contains(.editedCharacters) {
            placeholderLabel.isHidden = !text.isEmpty
        }
    }

}

Note that the use of a private (nested) class called PlaceholderLabel. It has no implementation at all, but it provides us a way to identify the placeholder label, which is far more 'swifty' than using the tag property.

With this approach, you can still assign the delegate of the UITextView to someone else.

You don't even have to change your text views' classes. Just add the extension(s) and you will be able to assign a placeholder string to every UITextView in your project, even in the Interface Builder.

I left out the implementation of a placeholderColor property for clarity reasons, but it can be implemented for just a few more lines with a similar computed variable to placeholder.

Flask Python Buttons

The appropriate way for doing this:

@app.route('/')
def index():
    if form.validate_on_submit():
        if 'download' in request.form:
            pass # do something
        elif 'watch' in request.form:
            pass # do something else

Put watch and download buttons into your template:

<input type="submit" name="download" value="Download">
<input type="submit" name="watch" value="Watch">

django order_by query set, ascending and descending

Reserved.objects.filter(client=client_id).order_by('-check_in')

'-' is indicates Descending order and for Ascending order just give class attribute

How do I call paint event?

I think you can also call Refresh().

Command /Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1

Adding the missing files(files in red color in Xcode->target->Build Phases->compiled sources) to the target folder resolved the issue for me.

Ctrl+click doesn't work in Eclipse Juno

The solution for me was to configure the build path to include the project itself.

Right click on open project.
highlight build path
click on Configure build path…
click on Source
Click Add Folder… button.
Put a check mark next to your project.
Click OK.

If necessary, click the project menu and choose the ‘clean…’ option to rebuild.

How to run Linux commands in Java?

You can use java.lang.Runtime.exec to run simple code. This gives you back a Process and you can read its standard output directly without having to temporarily store the output on disk.

For example, here's a complete program that will showcase how to do it:

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class testprog {
    public static void main(String args[]) {
        String s;
        Process p;
        try {
            p = Runtime.getRuntime().exec("ls -aF");
            BufferedReader br = new BufferedReader(
                new InputStreamReader(p.getInputStream()));
            while ((s = br.readLine()) != null)
                System.out.println("line: " + s);
            p.waitFor();
            System.out.println ("exit: " + p.exitValue());
            p.destroy();
        } catch (Exception e) {}
    }
}

When compiled and run, it outputs:

line: ./
line: ../
line: .classpath*
line: .project*
line: bin/
line: src/
exit: 0

as expected.

You can also get the error stream for the process standard error, and output stream for the process standard input, confusingly enough. In this context, the input and output are reversed since it's input from the process to this one (i.e., the standard output of the process).

If you want to merge the process standard output and error from Java (as opposed to using 2>&1 in the actual command), you should look into ProcessBuilder.

Running command line silently with VbScript and getting output?

@Mark Cidade

Thanks Mark! This solved few days of research on wondering how should I call this from the PHP WshShell. So thanks to your code, I figured...

function __exec($tmppath, $cmd)
{
   $WshShell = new COM("WScript.Shell");
   $tmpf = rand(1000, 9999).".tmp"; // Temp file
   $tmpfp = $tmppath.'/'.$tmpf; // Full path to tmp file

   $oExec = $WshShell->Run("cmd /c $cmd -c ... > ".$tmpfp, 0, true);

   // return $oExec == 0 ? true : false; // Return True False after exec
   return $tmpf;
}

This is what worked for me in my case. Feel free to use and modify as per your needs. You can always add functionality within the function to automatically read the tmp file, assign it to a variable and/or return it and then delete the tmp file. Thanks again @Mark!

How to get a list of installed android applications and pick one to run

Since Android 11 (API level 30), most user-installed apps are not visible by default. You must either statically declare which apps and/or intent filters you are going to get info about in your manifest like this:

<manifest>
    <queries>
        <!-- Explicit apps you know in advance about: -->
        <package android:name="com.example.this.app"/>
        <package android:name="com.example.this.other.app"/>

        <!-- Intent filter signatures that you are going to query: -->
        <intent>
            <action android:name="android.intent.action.SEND" />
            <data android:mimeType="image/jpeg" />
        </intent>
    </queries>
    
    ...
</manifest>

Or require the QUERY_ALL_PACKAGES permission.

After doing the above, the other answers here still apply.

Learn more here:

How to find Max Date in List<Object>?

Just use Kotlin!

val list = listOf(user1, user2, user3)
val maxDate = list.maxBy { it.date }?.date

Obtain smallest value from array in Javascript?

Update: use Darin's / John Resig answer, just keep in mind that you dont need to specifiy thisArg for min, so Math.min.apply(null, arr) will work just fine.

or you can just sort the array and get value #1: [2,6,7,4,1].sort()[0]

[!] But without supplying custom number sorting function, this will only work in one, very limited case: positive numbers less than 10. See how it would break:

var a = ['', -0.1, -2, -Infinity, Infinity, 0, 0.01, 2, 2.0, 2.01, 11, 1, 1e-10, NaN];

// correct: 
a.sort( function (a,b) { return a === b ? 0 : a < b ? -1: 1} );
//Array [NaN, -Infinity, -2, -0.1, 0, "", 1e-10, 0.01, 1, 2, 2, 2.01, 11, Infinity]

// incorrect:
a.sort();
//Array ["", -0.1, -2, -Infinity, 0, 0.01, 1, 11, 1e-10, 2, 2, 2.01, Infinity, NaN]

And, also, array is changed in-place, which might not be what you want.

Why doesn't document.addEventListener('load', function) work in a greasemonkey script?

this happened again around last quarter of 2017 . greasemonkey firing too late . after domcontentloaded event already been fired.

what to do:

i used @run-at document-start instead of document-end
updated firefox to 57.

from : https://github.com/greasemonkey/greasemonkey/issues/2769

Even as a (private) script writer I'm confused why my script isn't working.

The most likely problem is that the 'DOMContentLoaded' event is fired before the script is run. Now before you come back and say @run-at document-start is set, that directive isn't fully supported at the moment. Due to the very asynchronous nature of WebExtensions there's little guarantee on when something will be executed. When FF59 rolls around we'll have #2663 which will help. It'll actually help a lot of things, debugging too.

Preventing iframe caching in browser

To get the iframe to always load fresh content, add the current Unix timestamp to the end of the GET parameters. The browser then sees it as a 'different' request and will seek new content.

In Javascript, it might look like:

frames['my_iframe'].location.href='load_iframe_content.php?group_ID=' + group_ID + '&timestamp=' + timestamp;

What's alternative to angular.copy in Angular

I have created a service to use with Angular 5 or higher, it uses the angular.copy() the base of angularjs, it works well for me. Additionally, there are other functions like isUndefined, etc. I hope it helps. Like any optimization, it would be nice to know. regards

_x000D_

import { Injectable } from '@angular/core';

@Injectable({providedIn: 'root'})
export class AngularService {

  private TYPED_ARRAY_REGEXP = /^\[object (?:Uint8|Uint8Clamped|Uint16|Uint32|Int8|Int16|Int32|Float32|Float64)Array\]$/;
  private stackSource = [];
  private stackDest = [];

  constructor() { }

  public isNumber(value: any): boolean {
    if ( typeof value === 'number' ) { return true; }
    else { return false; }
  }

  public isTypedArray(value: any) {
    return value && this.isNumber(value.length) && this.TYPED_ARRAY_REGEXP.test(toString.call(value));
  }

  public isArrayBuffer(obj: any) {
    return toString.call(obj) === '[object ArrayBuffer]';
  }

  public isUndefined(value: any) {return typeof value === 'undefined'; }

  public isObject(value: any) {  return value !== null && typeof value === 'object'; }

  public isBlankObject(value: any) {
    return value !== null && typeof value === 'object' && !Object.getPrototypeOf(value);
  }

  public isFunction(value: any) { return typeof value === 'function'; }

  public setHashKey(obj: any, h: any) {
    if (h) { obj.$$hashKey = h; }
    else { delete obj.$$hashKey; }
  }

  private isWindow(obj: any) { return obj && obj.window === obj; }

  private isScope(obj: any) { return obj && obj.$evalAsync && obj.$watch; }


  private copyRecurse(source: any, destination: any) {

    const h = destination.$$hashKey;

    if (Array.isArray(source)) {
      for (let i = 0, ii = source.length; i < ii; i++) {
        destination.push(this.copyElement(source[i]));
      }
    } else if (this.isBlankObject(source)) {
      for (const key of Object.keys(source)) {
        destination[key] = this.copyElement(source[key]);
      }
    } else if (source && typeof source.hasOwnProperty === 'function') {
      for (const key of Object.keys(source)) {
        destination[key] = this.copyElement(source[key]);
      }
    } else {
      for (const key of Object.keys(source)) {
        destination[key] = this.copyElement(source[key]);
      }
    }
    this.setHashKey(destination, h);
    return destination;
  }

  private copyElement(source: any) {

    if (!this.isObject(source)) {
      return source;
    }

    const index = this.stackSource.indexOf(source);

    if (index !== -1) {
      return this.stackDest[index];
    }

    if (this.isWindow(source) || this.isScope(source)) {
      throw console.log('Cant copy! Making copies of Window or Scope instances is not supported.');
    }

    let needsRecurse = false;
    let destination = this.copyType(source);

    if (destination === undefined) {
      destination = Array.isArray(source) ? [] : Object.create(Object.getPrototypeOf(source));
      needsRecurse = true;
    }

    this.stackSource.push(source);
    this.stackDest.push(destination);

    return needsRecurse
      ? this.copyRecurse(source, destination)
      : destination;
  }

  private copyType = (source: any) => {

    switch (toString.call(source)) {
      case '[object Int8Array]':
      case '[object Int16Array]':
      case '[object Int32Array]':
      case '[object Float32Array]':
      case '[object Float64Array]':
      case '[object Uint8Array]':
      case '[object Uint8ClampedArray]':
      case '[object Uint16Array]':
      case '[object Uint32Array]':
        return new source.constructor(this.copyElement(source.buffer), source.byteOffset, source.length);

      case '[object ArrayBuffer]':
        if (!source.slice) {
          const copied = new ArrayBuffer(source.byteLength);
          new Uint8Array(copied).set(new Uint8Array(source));
          return copied;
        }
        return source.slice(0);

      case '[object Boolean]':
      case '[object Number]':
      case '[object String]':
      case '[object Date]':
        return new source.constructor(source.valueOf());

      case '[object RegExp]':
        const re = new RegExp(source.source, source.toString().match(/[^\/]*$/)[0]);
        re.lastIndex = source.lastIndex;
        return re;

      case '[object Blob]':
        return new source.constructor([source], {type: source.type});
    }

    if (this.isFunction(source.cloneNode)) {
      return source.cloneNode(true);
    }
  }

  public copy(source: any, destination?: any) {

    if (destination) {
      if (this.isTypedArray(destination) || this.isArrayBuffer(destination)) {
        throw console.log('Cant copy! TypedArray destination cannot be mutated.');
      }
      if (source === destination) {
        throw console.log('Cant copy! Source and destination are identical.');
      }

      if (Array.isArray(destination)) {
        destination.length = 0;
      } else {
        destination.forEach((value: any, key: any) => {
          if (key !== '$$hashKey') {
            delete destination[key];
          }
        });
      }

      this.stackSource.push(source);
      this.stackDest.push(destination);
      return this.copyRecurse(source, destination);
    }

    return this.copyElement(source);
  }
}

_x000D_

How to split a string in Haskell?

I started learning Haskell yesterday, so correct me if I'm wrong but:

split :: Eq a => a -> [a] -> [[a]]
split x y = func x y [[]]
    where
        func x [] z = reverse $ map (reverse) z
        func x (y:ys) (z:zs) = if y==x then 
            func x ys ([]:(z:zs)) 
        else 
            func x ys ((y:z):zs)

gives:

*Main> split ' ' "this is a test"
["this","is","a","test"]

or maybe you wanted

*Main> splitWithStr  " and " "this and is and a and test"
["this","is","a","test"]

which would be:

splitWithStr :: Eq a => [a] -> [a] -> [[a]]
splitWithStr x y = func x y [[]]
    where
        func x [] z = reverse $ map (reverse) z
        func x (y:ys) (z:zs) = if (take (length x) (y:ys)) == x then
            func x (drop (length x) (y:ys)) ([]:(z:zs))
        else
            func x ys ((y:z):zs)

NodeJS - What does "socket hang up" actually mean?

I do both web (node) and Android development, and open Android Studio device simulator and docker together, both of them use port 8601, it complained socket hang up error, after close Android Studio device simulator and it works well in node side. Don’t use Android Studio device simulator and docker together.

Range of values in C Int and Long 32 - 64 bits

Excerpt from K&R:

short is often 16 bits, long 32 bits and int either 16 bits or 32 bits. Each compiler is free to choose appropriate sizes for its own hardware, subject only to the restriction that shorts and ints are at least 16 bits, longs are at least 32 bits, and short is no longer than int, which is no longer than long.

You can make use of limits.h that contains the definition of the limits for the decimal/float types:

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <float.h>


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

    printf("CHAR_BIT    :   %d\n", CHAR_BIT);
    printf("CHAR_MAX    :   %d\n", CHAR_MAX);
    printf("CHAR_MIN    :   %d\n", CHAR_MIN);
    printf("INT_MAX     :   %d\n", INT_MAX);
    printf("INT_MIN     :   %d\n", INT_MIN);
    printf("LONG_MAX    :   %ld\n", (long) LONG_MAX);
    printf("LONG_MIN    :   %ld\n", (long) LONG_MIN);
    printf("SCHAR_MAX   :   %d\n", SCHAR_MAX);
    printf("SCHAR_MIN   :   %d\n", SCHAR_MIN);
    printf("SHRT_MAX    :   %d\n", SHRT_MAX);
    printf("SHRT_MIN    :   %d\n", SHRT_MIN);
    printf("UCHAR_MAX   :   %d\n", UCHAR_MAX);
    printf("UINT_MAX    :   %u\n", (unsigned int) UINT_MAX);
    printf("ULONG_MAX   :   %lu\n", (unsigned long) ULONG_MAX);
    printf("USHRT_MAX   :   %d\n", (unsigned short) USHRT_MAX);
    printf("FLT_MAX     :   %g\n", (float) FLT_MAX);
    printf("FLT_MIN     :   %g\n", (float) FLT_MIN);
    printf("-FLT_MAX    :   %g\n", (float) -FLT_MAX);
    printf("-FLT_MIN    :   %g\n", (float) -FLT_MIN);
    printf("DBL_MAX     :   %g\n", (double) DBL_MAX);
    printf("DBL_MIN     :   %g\n", (double) DBL_MIN);
    printf("-DBL_MAX     :  %g\n", (double) -DBL_MAX);

    return (EXIT_SUCCESS);
}

Maybe you might have to tweak a little bit on your machine, but it is a good template to start to get an idea of the (implementation-defined) min and max values.

What is float in Java?

Make it

float b= 3.6f;

A floating-point literal is of type float if it is suffixed with an ASCII letter F or f; otherwise its type is double and it can optionally be suffixed with an ASCII letter D or d

do-while loop in R

Pretty self explanatory.

repeat{
  statements...
  if(condition){
    break
  }
}

Or something like that I would think. To get the effect of the do while loop, simply check for your condition at the end of the group of statements.

How to clear out session on log out

Session.Clear();

shorthand If Statements: C#

To use shorthand to get the direction:

int direction = column == 0
                ? 0
                : (column == _gridSize - 1 ? 1 : rand.Next(2));

To simplify the code entirely:

if (column == gridSize - 1 || rand.Next(2) == 1)
{
}
else
{
}

How to evaluate a math expression given in string form?

The correct way to solve this is with a lexer and a parser. You can write simple versions of these yourself, or those pages also have links to Java lexers and parsers.

Creating a recursive descent parser is a really good learning exercise.

Using $state methods with $stateChangeStart toState and fromState in Angular ui-router

Suggestion 1

When you add an object to $stateProvider.state that object is then passed with the state. So you can add additional properties which you can read later on when needed.

Example route configuration

$stateProvider
.state('public', {
    abstract: true,
    module: 'public'
})
.state('public.login', {
    url: '/login',
    module: 'public'
})
.state('tool', {
    abstract: true,
    module: 'private'
})
.state('tool.suggestions', {
    url: '/suggestions',
    module: 'private'
});

The $stateChangeStart event gives you acces to the toState and fromState objects. These state objects will contain the configuration properties.

Example check for the custom module property

$rootScope.$on('$stateChangeStart', function(e, toState, toParams, fromState, fromParams) {
    if (toState.module === 'private' && !$cookies.Session) {
        // If logged out and transitioning to a logged in page:
        e.preventDefault();
        $state.go('public.login');
    } else if (toState.module === 'public' && $cookies.Session) {
        // If logged in and transitioning to a logged out page:
        e.preventDefault();
        $state.go('tool.suggestions');
    };
});

I didn't change the logic of the cookies because I think that is out of scope for your question.

Suggestion 2

You can create a Helper to get you this to work more modular.

Value publicStates

myApp.value('publicStates', function(){
    return {
      module: 'public',
      routes: [{
        name: 'login', 
        config: { 
          url: '/login'
        }
      }]
    };
});

Value privateStates

myApp.value('privateStates', function(){
    return {
      module: 'private',
      routes: [{
        name: 'suggestions', 
        config: { 
          url: '/suggestions'
        }
      }]
    };
});

The Helper

myApp.provider('stateshelperConfig', function () {
  this.config = {
    // These are the properties we need to set
    // $stateProvider: undefined
    process: function (stateConfigs){
      var module = stateConfigs.module;
      $stateProvider = this.$stateProvider;
      $stateProvider.state(module, {
        abstract: true,
        module: module
      });
      angular.forEach(stateConfigs, function (route){
        route.config.module = module;
        $stateProvider.state(module + route.name, route.config);
      });
    }
  };

  this.$get = function () {
    return {
      config: this.config
    };
  };
});

Now you can use the helper to add the state configuration to your state configuration.

myApp.config(['$stateProvider', '$urlRouterProvider', 
    'stateshelperConfigProvider', 'publicStates', 'privateStates',
  function ($stateProvider, $urlRouterProvider, helper, publicStates, privateStates) {
    helper.config.$stateProvider = $stateProvider;
    helper.process(publicStates);
    helper.process(privateStates);
}]);

This way you can abstract the repeated code, and come up with a more modular solution.

Note: the code above isn't tested

How to get max value of a column using Entity Framework?

In VB.Net it would be

Dim maxAge As Integer = context.Persons.Max(Function(p) p.Age)

how to select first N rows from a table in T-SQL?

You can use Microsoft's row_number() function to decide which rows to return. That means that you aren't limited to just the top X results, you can take pages.

SELECT * 
FROM (SELECT row_number() over (order by UserID) AS line_no, * 
      FROM dbo.User) as users
WHERE users.line_no < 10
OR users.line_no BETWEEN 34 and 67

You have to nest the original query though, because otherwise you'll get an error message telling you that you can't do what you want to in the way you probably should be able to in an ideal world.

Msg 4108, Level 15, State 1, Line 3
Windowed functions can only appear in the SELECT or ORDER BY clauses.

Set IDENTITY_INSERT ON is not working

The relevant part of the error message is

...when a column list is used...

You are not using a column list, you are using SELECT *. Use a column list instead:

SET IDENTITY_INSERT [MyDB].[dbo].[Equipment] ON 

INSERT INTO [MyDB].[dbo].[Equipment] (Col1, Col2, ...)
SELECT Col1, Col2, ... FROM [MyDBQA].[dbo].[Equipment] 

SET IDENTITY_INSERT [MyDB].[dbo].[Equipment] OFF

How do I move a file (or folder) from one folder to another in TortoiseSVN?

From the command line, you can type svn mv path1 path2. This will create an add and a delete operation, but there's not really a way around that - as far as I know - in Subversion.

How do I convert a string to enum in TypeScript?

Typescript 3.9 propsal

enum Color{ RED, GREEN }

const color = 'RED' as Color;

easy peasy... lemon squeezy!

Multiple controllers with AngularJS in single page app

You could also have embed all of your template views into your main html file. For Example:

<body ng-app="testApp">
  <h1>Test App</h1>
  <div ng-view></div>
  <script type = "text/ng-template" id = "index.html">
    <h1>Index Page</h1>
    <p>{{message}}</p>
  </script>
  <script type = "text/ng-template" id = "home.html">
    <h1>Home Page</h1>
    <p>{{message}}</p>
  </script>
</body>

This way if each template requires a different controller then you can still use the angular-router. See this plunk for a working example http://plnkr.co/edit/9X0fT0Q9MlXtHVVQLhgr?p=preview

This way once the application is sent from the server to your client, it is completely self contained assuming that it doesn't need to make any data requests, etc.

facebook Uncaught OAuthException: An active access token must be used to query information about the current user

After a certain amount of time, your access token expires.

To prevent this, you can request the 'offline_access' permission during the authentication, as noted here: Do Facebook Oauth 2.0 Access Tokens Expire?

How to set session timeout in web.config

The value you are setting in the timeout attribute is the one of the correct ways to set the session timeout value.

The timeout attribute specifies the number of minutes a session can be idle before it is abandoned. The default value for this attribute is 20.

By assigning a value of 1 to this attribute, you've set the session to be abandoned in 1 minute after its idle.

To test this, create a simple aspx page, and write this code in the Page_Load event,

Response.Write(Session.SessionID);

Open a browser and go to this page. A session id will be printed. Wait for a minute to pass, then hit refresh. The session id will change.

Now, if my guess is correct, you want to make your users log out as soon as the session times out. For doing this, you can rig up a login page which will verify the user credentials, and create a session variable like this -

Session["UserId"] = 1;

Now, you will have to perform a check on every page for this variable like this -

if(Session["UserId"] == null)
    Response.Redirect("login.aspx");

This is a bare-bones example of how this will work.

But, for making your production quality secure apps, use Roles & Membership classes provided by ASP.NET. They provide Forms-based authentication which is much more reliabletha the normal Session-based authentication you are trying to use.

How do you calculate log base 2 in Java for integers?

let's add:

int[] fastLogs;

private void populateFastLogs(int length) {
    fastLogs = new int[length + 1];
    int counter = 0;
    int log = 0;
    int num = 1;
    fastLogs[0] = 0;
    for (int i = 1; i < fastLogs.length; i++) {
        counter++;
        fastLogs[i] = log;
        if (counter == num) {
            log++;
            num *= 2;
            counter = 0;
        }
    }
}

Source: https://github.com/pochuan/cs166/blob/master/ps1/rmq/SparseTableRMQ.java

SQL: Two select statements in one query

The UNION statement is your friend:

SELECT   a.playername, a.games, a.goals
FROM     tblMadrid as a
WHERE    a.playername = "ronaldo"
UNION
SELECT   b.playername, b.games, b.goals
FROM     tblBarcelona as b
WHERE    b.playername = "messi"
ORDER BY goals;

Python: fastest way to create a list of n lists

The probably only way which is marginally faster than

d = [[] for x in xrange(n)]

from itertools import repeat
d = [[] for i in repeat(None, n)]

It does not have to create a new int object in every iteration and is about 15 % faster on my machine.

Edit: Using NumPy, you can avoid the Python loop using

d = numpy.empty((n, 0)).tolist()

but this is actually 2.5 times slower than the list comprehension.

Import an existing git project into GitLab?

Add the new gitlab remote to your existing repository and push:

git remote add gitlab url-to-gitlab-repo
git push gitlab master

Create a date time with month and day only, no year

Well, you can create your own type - but a DateTime always has a full date and time. You can't even have "just a date" using DateTime - the closest you can come is to have a DateTime at midnight.

You could always ignore the year though - or take the current year:

// Consider whether you want DateTime.UtcNow.Year instead
DateTime value = new DateTime(DateTime.Now.Year, month, day);

To create your own type, you could always just embed a DateTime within a struct, and proxy on calls like AddDays etc:

public struct MonthDay : IEquatable<MonthDay>
{
    private readonly DateTime dateTime;

    public MonthDay(int month, int day)
    {
        dateTime = new DateTime(2000, month, day);
    }

    public MonthDay AddDays(int days)
    {
        DateTime added = dateTime.AddDays(days);
        return new MonthDay(added.Month, added.Day);
    }

    // TODO: Implement interfaces, equality etc
}

Note that the year you choose affects the behaviour of the type - should Feb 29th be a valid month/day value or not? It depends on the year...

Personally I don't think I would create a type for this - instead I'd have a method to return "the next time the program should be run".

Android toolbar center title and custom font

No one has mentioned this, but there are some attributes for Toolbar:

app:titleTextColor for setting the title text color

app:titleTextAppearance for setting the title text appearance

app:titleMargin for setting the margin

And there are other specific-side margins such as marginStart, etc.

htaccess Access-Control-Allow-Origin

BTW: the .htaccess config must be done on the server hosting the API. For example you create an AngularJS app on x.com domain and create a Rest API on y.com, you should set Access-Control-Allow-Origin "*" in the .htaccess file on the root folder of y.com not x.com :)

<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
</IfModule>

Also as Lukas mentioned make sure you have enabled mod_headers if you use Apache

How do I select text nodes with jQuery?

Jauco posted a good solution in a comment, so I'm copying it here:

$(elem)
  .contents()
  .filter(function() {
    return this.nodeType === 3; //Node.TEXT_NODE
  });

Twitter - How to embed native video from someone else's tweet into a New Tweet or a DM

I eventually figured out an easy way to do it:

On your Twitter feed, click the date/time of the tweet containing the video. That will open the single tweet view
Look for the down-pointing arrow at the top-right corner of the tweet, click it to open drop-down menue
Select the "Embed Video" option and copy the HTML embed code and Paste it to Notepad
Find the last "t.co" shortened URL inside the HTML code (should be something like this: https://``t.co/tQM43ftXyM). Copy this URL and paste it in a new browser tab.
The browser will expand the shortened URL to something which looks like this: https://twitter.com/UserName/status/828267001496784896/video/1

This is the link to the Twitter Card containing the native video. Pasting this link in a new tweet or DM will include the native video in it!

How can I compare time in SQL Server?

Adding to the other answers:

you can create a function for trimming the date from a datetime

CREATE FUNCTION dbo.f_trimdate (@dat datetime) RETURNS DATETIME AS BEGIN
    RETURN CONVERT(DATETIME, CONVERT(FLOAT, @dat) - CONVERT(INT, @dat))
END

So this:

DECLARE @dat DATETIME
SELECT @dat = '20080201 02:25:46.000'
SELECT dbo.f_trimdate(@dat)

Will return 1900-01-01 02:25:46.000

apache and httpd running but I can't see my website

There are several possibilities.

firewall, iptables configuration
apache listen address / port

More information is needed about your configuration. What distro are you using? Can you connect via 127.0.0.1?

If the issue is with the firewall/iptables, you can add the following lines to /etc/sysconfig/iptables:

-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT

(Second line is only needed for https)

Make sure this is above any lines that would globally restrict access, like the following:

-A INPUT -j REJECT --reject-with icmp-host-prohibited

Tested on CentOS 6.3

And finally

service iptables restart

Removing the textarea border in HTML

Add this to your <head>:

<style type="text/css">
    textarea { border: none; }
</style>

Or do it directly on the textarea:

<textarea style="border: none"></textarea>

Limiting Powershell Get-ChildItem by File Creation Date Range

Use Where-Object, like:

Get-ChildItem 'PATH' -recurse -include @("*.tif*","*.jp2","*.pdf") | 
Where-Object { $_.CreationTime -gt "03/01/2013" -and $_.CreationTime -lt "03/31/2013" }
Select-Object FullName, CreationTime, @{Name="Mbytes";Expression={$_.Length/1Kb}}, @{Name="Age";Expression={(((Get-Date) - $_.CreationTime).Days)}} | 
Export-Csv 'PATH\scans.csv'

How can I compile LaTeX in UTF8?

I have success with using the Chrome addon "Sharelatex". This online editor has great compability with most latex files, but it somewhat lacks configuration possibilities. www.sharelatex.com

How to remove all white space from the beginning or end of a string?

take a look at Trim() which returns a new string with whitespace removed from the beginning and end of the string it is called on.

PHP Configuration: It is not safe to rely on the system's timezone settings

Check for syntax errors in the php.ini file, specially before the Date paramaters, that prevent the file from being parsed correctly.

Whats the CSS to make something go to the next line in the page?

There are two options that I can think of, but without more details, I can't be sure which is the better:

#elementId {
    display: block;
}

This will force the element to a 'new line' if it's not on the same line as a floated element.

#elementId {
     clear: both;
}

This will force the element to clear the floats, and move to a 'new line.'

In the case of the element being on the same line as another that has position of fixed or absolute nothing will, so far as I know, force a 'new line,' as those elements are removed from the document's normal flow.

Error : Program type already present: android.support.design.widget.CoordinatorLayout$Behavior

The solution for this is that remove this following dependency:

implementation 'com.android.support:design:26.1.0'

put general dependencies as:

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:support-compat:26.1.0'
    implementation 'com.android.support:multidex:1.0.3'    
    implementation 'com.android.support:support-v4:26.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.facebook.android:audience-network-sdk:4.99.1'
}

How to display multiple images in one figure correctly?

Here is my approach that you may try:

import numpy as np
import matplotlib.pyplot as plt

w=10
h=10
fig=plt.figure(figsize=(8, 8))
columns = 4
rows = 5
for i in range(1, columns*rows +1):
    img = np.random.randint(10, size=(h,w))
    fig.add_subplot(rows, columns, i)
    plt.imshow(img)
plt.show()

The resulting image:

(Original answer date: Oct 7 '17 at 4:20)

Edit 1

Since this answer is popular beyond my expectation. And I see that a small change is needed to enable flexibility for the manipulation of the individual plots. So that I offer this new version to the original code. In essence, it provides:-

access to individual axes of subplots
possibility to plot more features on selected axes/subplot

New code:

import numpy as np
import matplotlib.pyplot as plt

w = 10
h = 10
fig = plt.figure(figsize=(9, 13))
columns = 4
rows = 5

# prep (x,y) for extra plotting
xs = np.linspace(0, 2*np.pi, 60)  # from 0 to 2pi
ys = np.abs(np.sin(xs))           # absolute of sine

# ax enables access to manipulate each of subplots
ax = []

for i in range(columns*rows):
    img = np.random.randint(10, size=(h,w))
    # create subplot and append to ax
    ax.append( fig.add_subplot(rows, columns, i+1) )
    ax[-1].set_title("ax:"+str(i))  # set title
    plt.imshow(img, alpha=0.25)

# do extra plots on selected axes/subplots
# note: index starts with 0
ax[2].plot(xs, 3*ys)
ax[19].plot(ys**2, xs)

plt.show()  # finally, render the plot

The resulting plot:

Edit 2

In the previous example, the code provides access to the sub-plots with single index, which is inconvenient when the figure has many rows/columns of sub-plots. Here is an alternative of it. The code below provides access to the sub-plots with [row_index][column_index], which is more suitable for manipulation of array of many sub-plots.

import matplotlib.pyplot as plt
import numpy as np

# settings
h, w = 10, 10        # for raster image
nrows, ncols = 5, 4  # array of sub-plots
figsize = [6, 8]     # figure size, inches

# prep (x,y) for extra plotting on selected sub-plots
xs = np.linspace(0, 2*np.pi, 60)  # from 0 to 2pi
ys = np.abs(np.sin(xs))           # absolute of sine

# create figure (fig), and array of axes (ax)
fig, ax = plt.subplots(nrows=nrows, ncols=ncols, figsize=figsize)

# plot simple raster image on each sub-plot
for i, axi in enumerate(ax.flat):
    # i runs from 0 to (nrows*ncols-1)
    # axi is equivalent with ax[rowid][colid]
    img = np.random.randint(10, size=(h,w))
    axi.imshow(img, alpha=0.25)
    # get indices of row/column
    rowid = i // ncols
    colid = i % ncols
    # write row/col indices as axes' title for identification
    axi.set_title("Row:"+str(rowid)+", Col:"+str(colid))

# one can access the axes by ax[row_id][col_id]
# do additional plotting on ax[row_id][col_id] of your choice
ax[0][2].plot(xs, 3*ys, color='red', linewidth=3)
ax[4][3].plot(ys**2, xs, color='green', linewidth=3)

plt.tight_layout(True)
plt.show()

The resulting plot:

How to get the type of a variable in MATLAB?

Use the class function

>> b = 2
b =
     2
>> a = 'Hi'
a =
Hi
>> class(b)
ans =
double
>> class(a)
ans =
char

- java.lang.NullPointerException - setText on null object reference

Here lies your problem:

private void fillTextView (int id, String text) {
    TextView tv = (TextView) findViewById(id);
    tv.setText(text); // tv is null
}

--> (TextView) findViewById(id); // returns null But from your code, I can't find why this method returns null. Try to track down, what id you give as a parameter and if this view with the specified id exists.

The error message is very clear and even tells you at what method. From the documentation:

public final View findViewById (int id)
    Look for a child view with the given id. If this view has the given id, return this view.
    Parameters
        id  The id to search for.
    Returns
        The view that has the given id in the hierarchy or null

http://developer.android.com/reference/android/view/View.html#findViewById%28int%29

In other words: You have no view with the id you give as a parameter.

Difference between CLOCK_REALTIME and CLOCK_MONOTONIC?

CLOCK_REALTIME is affected by NTP, and can move forwards and backwards. CLOCK_MONOTONIC is not, and advances at one tick per tick.

multiple where condition codeigniter

it's late for this answer but i think maybe still can help, i try the both methods above, using two where conditions and the method with the array, none of those work for me i did several test and the condition was never getting executed, so i did a workaround, here is my code:

public function validateLogin($email, $password){
        $password = md5($password);
        $this->db->select("userID,email,password");
        $query = $this->db->get_where("users", array("email" => $email));
        $p = $query->row_array();

        if($query->num_rows() == 1 && $password == $p['password']){  
            return $query->row();
        }

    }

setting textColor in TextView in layout/main.xml main layout file not referencing colors.xml file. (It wants a #RRGGBB instead of @color/text_color)

A variation using just standard color code:

android:textColor="#ff0000"

Using ORDER BY and GROUP BY together

Why make it so complicated? This worked.

SELECT m_id,v_id,MAX(TIMESTAMP) AS TIME
 FROM table_name 
 GROUP BY m_id

CSS Animation and Display None

You can manage to have a pure CSS implementation with max-height

#main-image{
    max-height: 0;
    overflow: hidden;
    background: red;
   -prefix-animation: slide 1s ease 3.5s forwards;
}

@keyframes slide {
  from {max-height: 0;}
  to {max-height: 500px;}
}

You might have to also set padding, margin and border to 0, or simply padding-top, padding-bottom, margin-top and margin-bottom.

I updated the demo of Duopixel here : http://jsfiddle.net/qD5XX/231/

Serving favicon.ico in ASP.NET MVC

It should also be possible to create a controller that returns the ico file and register the route /favicon.ico to point to that controller.

Difference between Math.Floor() and Math.Truncate()

They are functionally equivalent with positive numbers. The difference is in how they handle negative numbers.

For example:

Math.Floor(2.5) = 2
Math.Truncate(2.5) = 2

Math.Floor(-2.5) = -3
Math.Truncate(-2.5) = -2

MSDN links: - Math.Floor Method - Math.Truncate Method

P.S. Beware of Math.Round it may not be what you expect.

To get the "standard" rounding result use:

float myFloat = 4.5;
Console.WriteLine( Math.Round(myFloat) ); // writes 4
Console.WriteLine( Math.Round(myFloat, 0, MidpointRounding.AwayFromZero) ) //writes 5
Console.WriteLine( myFloat.ToString("F0") ); // writes 5

Why does the preflight OPTIONS request of an authenticated CORS request work in Chrome but not Firefox?

Why does it work in Chrome and not Firefox?

The W3 spec for CORS preflight requests clearly states that user credentials should be excluded. There is a bug in Chrome and WebKit where OPTIONS requests returning a status of 401 still send the subsequent request.

Firefox has a related bug filed that ends with a link to the W3 public webapps mailing list asking for the CORS spec to be changed to allow authentication headers to be sent on the OPTIONS request at the benefit of IIS users. Basically, they are waiting for those servers to be obsoleted.

How can I get the OPTIONS request to send and respond consistently?

Simply have the server (API in this example) respond to OPTIONS requests without requiring authentication.

Kinvey did a good job expanding on this while also linking to an issue of the Twitter API outlining the catch-22 problem of this exact scenario interestingly a couple weeks before any of the browser issues were filed.

How to give environmental variable path for file appender in configuration file in log4j

To dynamically change a variable you can do something like this:

String value = System.getenv("MY_HOME");
Properties prop = new Properties("log4j.properties"); 
prop.put("MY_HOME", value); // overwrite with value from environment
PropertyConfigurator.configure(prop);

Clear listview content?

As of Android versions M and N, following works for me and would be the correct approach. Emptying the ListView or setting the Adapter to null is not the right approach and would lead to null pointer issue, invalid ListView and/or crash of the app.

Simply do:

    mList.clear();
    mAdapter.notifyDataSetChanged();

i.e. first you clear the list altogether, and then let the adapter know about this change. Android will take care of correctly updating the UI with an empty list. In my case, my list is an ArrayList.

In case you are doing this operation from a different thread, run this code on the UI thread:

    runOnUiThread(mRunnable);

Where mRunnable would be:

    Runnable mRunnable = new Runnable() {
        public void run() {
            mList.clear();
            mAdapter.notifyDataSetChanged();
        }
    };;

Display Images Inline via CSS

You have a line break <br> in-between the second and third images in your markup. Get rid of that, and it'll show inline.

Hibernate-sequence doesn't exist

FYI

If you are using hbm files to define the O/R mapping.

Notice that:

In Hibernate 5, the param name for the sequence name has been changed.

The following setting worked fine in Hibernate 4:

<generator class="sequence">
    <param name="sequence">xxxxxx_seq</param>
</generator>

But in Hibernate 5, the same mapping setting file will cause a "hibernate_sequence doesn't exist" error.

To fix this error, the param name must change to:

<generator class="sequence">
    <param name="sequence_name">xxxxxx_seq</param>
</generator>

This problem wasted me 2, 3 hours.

And somehow, it looks like there are no document about it.

I have to read the source code of org.hibernate.id.enhanced.SequenceStyleGenerator to figure it out

Rename a table in MySQL

Running The Alter Command

1.Click the SQL tab at the top.

2.In the text box enter the following command: ALTER TABLE exampletable RENAME TO new_table_name;

3.Click the go button.

source : https://my.bluehost.com/hosting/help/2158

Closing pyplot windows

Please use

plt.show(block=False)
plt.close('all')

What is the significance of url-pattern in web.xml and how to configure servlet?

url-pattern is used in web.xml to map your servlet to specific URL. Please see below xml code, similar code you may find in your web.xml configuration file.

<servlet>
    <servlet-name>AddPhotoServlet</servlet-name>  //servlet name
    <servlet-class>upload.AddPhotoServlet</servlet-class>  //servlet class
</servlet>
 <servlet-mapping>
    <servlet-name>AddPhotoServlet</servlet-name>   //servlet name
    <url-pattern>/AddPhotoServlet</url-pattern>  //how it should appear
</servlet-mapping>

If you change url-pattern of AddPhotoServlet from /AddPhotoServlet to /MyUrl. Then, AddPhotoServlet servlet can be accessible by using /MyUrl. Good for the security reason, where you want to hide your actual page URL.

Java Servlet url-pattern Specification:

A string beginning with a '/' character and ending with a '/*' suffix is used for path mapping.

A string beginning with a '*.' prefix is used as an extension mapping.

A string containing only the '/' character indicates the "default" servlet of the application. In this case the servlet path is the request URI minus the context path and the path info is null.

All other strings are used for exact matches only.

Reference : Java Servlet Specification

You may also read this Basics of Java Servlet

Difference between 2 dates in seconds

$timeFirst  = strtotime('2011-05-12 18:20:20');
$timeSecond = strtotime('2011-05-13 18:20:20');
$differenceInSeconds = $timeSecond - $timeFirst;

You will then be able to use the seconds to find minutes, hours, days, etc.

AngularJS: how to implement a simple file upload with multipart form?

You could upload via $resource by assigning data to params attribute of resource actions like so:

$scope.uploadFile = function(files) {
    var fdata = new FormData();
    fdata.append("file", files[0]);

    $resource('api/post/:id', { id: "@id" }, {
        postWithFile: {
            method: "POST",
            data: fdata,
            transformRequest: angular.identity,
            headers: { 'Content-Type': undefined }
        }
    }).postWithFile(fdata).$promise.then(function(response){
         //successful 
    },function(error){
        //error
    });
};

Difference between Pig and Hive? Why have both?

Have a look at Pig Vs Hive Comparison in a nut shell from a "dezyre" article

Hive is better than PIG in: Partitions, Server, Web interface & JDBC/ODBC support.

Some differences:

Hive is best for structured Data & PIG is best for semi structured data
Hive is used for reporting & PIG for programming
Hive is used as a declarative SQL & PIG as a procedural language
Hive supports partitions & PIG does not
Hive can start an optional thrift based server & PIG cannot
Hive defines tables beforehand (schema) + stores schema information in a database & PIG doesn't have a dedicated metadata of database
Hive does not support Avro but PIG does. EDIT: Hive supports Avro, specify the serde as org.apache.hadoop.hive.serde2.avro
Pig also supports additional COGROUP feature for performing outer joins but hive does not. But both Hive & PIG can join, order & sort dynamically.

Dynamic WHERE clause in LINQ

You can also use the PredicateBuilder from LinqKit to chain multiple typesafe lambda expressions using Or or And.

http://www.albahari.com/nutshell/predicatebuilder.aspx

Is not an enclosing class Java

To achieve the requirement from the question, we can put classes into interface:

public interface Shapes {
    class AShape{
    }
    class ZShape{
    }
}

and then use as author tried before:

public class Test {
    public static void main(String[] args) {
        Shape s = new Shapes.ZShape();
    }
}

If we looking for the proper "logical" solution, should be used fabric design pattern

"multiple target patterns" Makefile error

I also got this error (within the Eclipse-based STM32CubeIDE on Windows).

After double-clicking on the "multiple target patterns" error it showed a path to a .ld file. It turns out to be another "illegal character" problem. The offending character was the (wait for it): =

Heuristic of the week: use only [a..z] in your paths, as there are bound to be other illegal characters </vomit>.

The GNU make manual doesn't explicitly document this.

Plot multiple columns on the same graph in R

Using tidyverse

df %>% tidyr::gather("id", "value", 1:4) %>% 
  ggplot(., aes(Xax, value))+
  geom_point()+
  geom_smooth(method = "lm", se=FALSE, color="black")+
  facet_wrap(~id)

DATA

df<- read.table(text =c("
A       B       C       G       Xax
0.451   0.333   0.034   0.173   0.22        
0.491   0.270   0.033   0.207   0.34    
0.389   0.249   0.084   0.271   0.54    
0.425   0.819   0.077   0.281   0.34
0.457   0.429   0.053   0.386   0.53    
0.436   0.524   0.049   0.249   0.12    
0.423   0.270   0.093   0.279   0.61    
0.463   0.315   0.019   0.204   0.23"), header = T)

how to do file upload using jquery serialization

A file cannot be uploaded using AJAX because you cannot access the contents of a file stored on the client computer and send it in the request using javascript. One of the techniques to achieve this is to use hidden iframes. There's a nice jquery form plugin which allows you to AJAXify your forms and it supports file uploads as well. So using this plugin your code will simply look like this:

$(function() {
    $('#ifoftheform').ajaxForm(function(result) {
        alert('the form was successfully processed');
    });
});

The plugin automatically takes care of subscribing to the submit event of the form, canceling the default submission, serializing the values, using the proper method and handle file upload fields, ...

Differences between "BEGIN RSA PRIVATE KEY" and "BEGIN PRIVATE KEY"

See https://polarssl.org/kb/cryptography/asn1-key-structures-in-der-and-pem (search the page for "BEGIN RSA PRIVATE KEY") (archive link for posterity, just in case).

BEGIN RSA PRIVATE KEY is PKCS#1 and is just an RSA key. It is essentially just the key object from PKCS#8, but without the version or algorithm identifier in front. BEGIN PRIVATE KEY is PKCS#8 and indicates that the key type is included in the key data itself. From the link:

The unencrypted PKCS#8 encoded data starts and ends with the tags:
-----BEGIN PRIVATE KEY-----
BASE64 ENCODED DATA
-----END PRIVATE KEY-----
Within the base64 encoded data the following DER structure is present:
PrivateKeyInfo ::= SEQUENCE {
  version         Version,
  algorithm       AlgorithmIdentifier,
  PrivateKey      BIT STRING
}

AlgorithmIdentifier ::= SEQUENCE {
  algorithm       OBJECT IDENTIFIER,
  parameters      ANY DEFINED BY algorithm OPTIONAL
}
So for an RSA private key, the OID is 1.2.840.113549.1.1.1 and there is a RSAPrivateKey as the PrivateKey key data bitstring.

As opposed to BEGIN RSA PRIVATE KEY, which always specifies an RSA key and therefore doesn't include a key type OID. BEGIN RSA PRIVATE KEY is PKCS#1:

RSA Private Key file (PKCS#1)

The RSA private key PEM file is specific for RSA keys.

It starts and ends with the tags:

-----BEGIN RSA PRIVATE KEY-----
BASE64 ENCODED DATA
-----END RSA PRIVATE KEY-----

Within the base64 encoded data the following DER structure is present:

RSAPrivateKey ::= SEQUENCE {
  version           Version,
  modulus           INTEGER,  -- n
  publicExponent    INTEGER,  -- e
  privateExponent   INTEGER,  -- d
  prime1            INTEGER,  -- p
  prime2            INTEGER,  -- q
  exponent1         INTEGER,  -- d mod (p-1)
  exponent2         INTEGER,  -- d mod (q-1)
  coefficient       INTEGER,  -- (inverse of q) mod p
  otherPrimeInfos   OtherPrimeInfos OPTIONAL
}

Visual Studio: How to show Overloads in IntelliSense?

Tested only on Visual Studio 2010.

Place your cursor within the (), press Ctrl+K, then P.

Now navigate by pressing the ? / ? arrow keys.

Clearing a string buffer/builder after loop

You have two options:

Either use:

sb.setLength(0);  // It will just discard the previous data, which will be garbage collected later.

Or use:

sb.delete(0, sb.length());  // A bit slower as it is used to delete sub sequence.

NOTE

Avoid declaring StringBuffer or StringBuilder objects within the loop else it will create new objects with each iteration. Creating of objects requires system resources, space and also takes time. So for long run, avoid declaring them within a loop if possible.

Sending email with gmail smtp with codeigniter email library

Another option I have working, in a linux server with Postfix:

First, configure CI email to use your server's email system: eg, in email.php, for example

# alias to postfix in a typical Postfix server
$config['protocol'] = 'sendmail'; 
$config['mailpath'] = '/usr/sbin/sendmail';

Then configure your postfix to relay the mail to google (perhaps depending on the sender address). You'll probably need to put you user-password settings in /etc/postfix/sasl_passwd (docs)

This is much simpler (and less fragmente) if you have a linux box, already configured to send some/all of its outgoing emails to Google.

How open PowerShell as administrator from the run window

Yes, it is possible to run PowerShell through the run window. However, it would be burdensome and you will need to enter in the password for computer. This is similar to how you will need to set up when you run cmd:

runas /user:(ComputerName)\(local admin) powershell.exe

So a basic example would be:

runas /user:MyLaptop\[email protected]  powershell.exe

You can find more information on this subject in Runas.

However, you could also do one more thing :

1: `Windows+R`
2: type: `powershell`
3: type: `Start-Process powershell -verb runAs`

then your system will execute the elevated powershell.

How to jquery alert confirm box "yes" & "no"

I won't write your code but what you looking for is something like a jquery dialog

take a look here

jQuery modal-confirmation

$(function() {
    $( "#dialog-confirm" ).dialog({
      resizable: false,
      height:140,
      modal: true,
      buttons: {
        "Delete all items": function() {
          $( this ).dialog( "close" );
        },
        Cancel: function() {
          $( this ).dialog( "close" );
        }
      }
    });
  });

<div id="dialog-confirm" title="Empty the recycle bin?">
  <p>
    <span class="ui-icon ui-icon-alert" style="float:left; margin:0 7px 20px 0;"></span>
    These items will be permanently deleted and cannot be recovered. Are you sure?
  </p>
</div>

How to select specified node within Xpath node sets by index with Selenium?

//img[@title='Modify'][i]

is short for

/descendant-or-self::node()/img[@title='Modify'][i]

hence is returning the i'th node under the same parent node.

You want

/descendant-or-self::img[@title='Modify'][i]

How long will my session last?

You're searching for gc_maxlifetime, see http://php.net/manual/en/session.configuration.php#ini.session.gc-maxlifetime for a description.

Your session will last 1440 seconds which is 24 minutes (default).

Sorting an array in C?

In your particular case the fastest sort is probably the one described in this answer. It is exactly optimized for an array of 6 ints and uses sorting networks. It is 20 times (measured on x86) faster than library qsort. Sorting networks are optimal for sort of fixed length arrays. As they are a fixed sequence of instructions they can even be implemented easily by hardware.

Generally speaking there is many sorting algorithms optimized for some specialized case. The general purpose algorithms like heap sort or quick sort are optimized for in place sorting of an array of items. They yield a complexity of O(n.log(n)), n being the number of items to sort.

The library function qsort() is very well coded and efficient in terms of complexity, but uses a call to some comparizon function provided by user, and this call has a quite high cost.

For sorting very large amount of datas algorithms have also to take care of swapping of data to and from disk, this is the kind of sorts implemented in databases and your best bet if you have such needs is to put datas in some database and use the built in sort.

How to save a dictionary to a file?

Unless you really want to keep the dictionary, I think the best solution is to use the csv Python module to read the file. Then, you get rows of data and you can change member_phone or whatever you want ; finally, you can use the csv module again to save the file in the same format as you opened it.

Code for reading:

import csv

with open("my_input_file.txt", "r") as f:
   reader = csv.reader(f, delimiter=":")
   lines = list(reader)

Code for writing:

with open("my_output_file.txt", "w") as f:
   writer = csv.writer(f, delimiter=":")
   writer.writerows(lines)

Of course, you need to adapt your change() function:

def change(lines):
    a = input('ID')
    for line in lines:
      if line[0] == a:
        d=str(input("phone"))
        line[3]=d
        break
    else:
      print "not"

How to make a window always stay on top in .Net?

I had a momentary 5 minute lapse and I forgot to specify the form in full like this:

  myformName.ActiveForm.TopMost = true;

But what I really wanted was THIS!

  this.TopMost = true;

Spring Rest POST Json RequestBody Content type not supported

I found solution. It's was because I had 2 setter with same name but different type.

My class had id property int that I replaced with Integer when à Hibernitify my object.

But apparently, I forgot to remove setters and I had :

/**
 * @param id
 *            the id to set
 */
public void setId(int id) {
    this.id = id;
}

/**
 * @param id
 *            the id to set
 */
public void setId(Integer id) {
    this.id = id;
}

When I removed this setter, rest resquest work very well.

Intead to throw unmarshalling error or reflect class error. Exception HttpMediaTypeNotSupportedException seams really strange here.

I hope this stackoverflow could be help someone else.

SIDE NOTE

You can check your Spring server console for the following error message:

Failed to evaluate Jackson deserialization for type [simple type, class your.package.ClassName]: com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property "propertyname"

Then you can be sure you are dealing with the issue mentioned above.

C#: what is the easiest way to subtract time?

Use the TimeSpan object to capture your initial time element and use the methods such as AddHours or AddMinutes. To substract 3 hours, you will do AddHours(-3). To substract 45 mins, you will do AddMinutes(-45)

ld cannot find an existing library

Unless I'm badly mistaken libmagic or -lmagic is not the same library as ImageMagick. You state that you want ImageMagick.

ImageMagick comes with a utility to supply all appropriate options to the compiler.

Ex:

g++ program.cpp `Magick++-config --cppflags --cxxflags --ldflags --libs` -o "prog"

C error: undefined reference to function, but it IS defined

I had this issue recently. In my case, I had my IDE set to choose which compiler (C or C++) to use on each file according to its extension, and I was trying to call a C function (i.e. from a .c file) from C++ code.

The .h file for the C function wasn't wrapped in this sort of guard:

#ifdef __cplusplus
extern "C" {
#endif

// all of your legacy C code here

#ifdef __cplusplus
}
#endif

I could've added that, but I didn't want to modify it, so I just included it in my C++ file like so:

extern "C" {
#include "legacy_C_header.h"
}

(Hat tip to UncaAlby for his clear explanation of the effect of extern "C".)

Updates were rejected because the tip of your current branch is behind hint: its remote counterpart. Integrate the remote changes (e.g

You need to merge the remote branch into your current branch by running git pull.

If your local branch is already up-to-date, you may also need to run git pull --rebase.

A quick google search also turned up this same question asked by another SO user: Cannot push to GitHub - keeps saying need merge. More details there.

How do I hide an element when printing a web page?

You could place the link within a div, then use JavaScript on the anchor tag to hide the div when clicked. Example (not tested, may need to be tweaked but you get the idea):

<div id="printOption">
    <a href="javascript:void();" 
       onclick="document.getElementById('printOption').style.visibility = 'hidden'; 
       document.print(); 
       return true;">
       Print
    </a>
</div>

The downside is that once clicked, the button disappears and they lose that option on the page (there's always Ctrl+P though).

The better solution would be to create a print stylesheet and within that stylesheet specify the hidden status of the printOption ID (or whatever you call it). You can do this in the head section of the HTML and specify a second stylesheet with a media attribute.

Can I fade in a background image (CSS: background-image) with jQuery?

With modern browser i prefer a much lightweight approach with a bit of Js and CSS3...

transition: background 300ms ease-in 200ms;

Look at this demo:

http://codepen.io/nicolasbonnici/pen/gPVNbr

What is the curl error 52 "empty reply from server"?

This can happen if curl is asked to do plain HTTP on a server that does HTTPS.

Example:

$ curl http://google.com:443
curl: (52) Empty reply from server

Center button under form in bootstrap

Try giving

default width, display it with block and center it with margin: 0 auto;

like this:

<p style="display:block; line-height: 70px; width:200px; margin:0 auto;"><button type="submit" class="btn">Confirm</button></p>

VHDL - How should I create a clock in a testbench?

Concurrent signal assignment:

library ieee;
use ieee.std_logic_1164.all;

entity foo is
end;
architecture behave of foo is
    signal clk: std_logic := '0';
begin
CLOCK:
clk <=  '1' after 0.5 ns when clk = '0' else
        '0' after 0.5 ns when clk = '1';
end;

ghdl -a foo.vhdl
ghdl -r foo --stop-time=10ns --wave=foo.ghw
ghdl:info: simulation stopped by --stop-time
gtkwave foo.ghw

enter image description here

Simulators simulate processes and it would be transformed into the equivalent process to your process statement. Simulation time implies the use of wait for or after when driving events for sensitivity clauses or sensitivity lists.

Find files with size in Unix

find . -size +10000k -exec ls -sd {} +

If your version of find won't accept the + notation (which acts rather like xargs does), then you might use (GNU find and xargs, so find probably supports + anyway):

find . -size +10000k -print0 | xargs -0 ls -sd

or you might replace the + with \; (and live with the relative inefficiency of this), or you might live with problems caused by spaces in names and use the portable:

find . -size +10000k -print | xargs ls -sd

The -d on the ls commands ensures that if a directory is ever found (unlikely, but...), then the directory information will be printed, not the files in the directory. And, if you're looking for files more than 1 MB (as a now-deleted comment suggested), you need to adjust the +10000k to 1000k or maybe +1024k, or +2048 (for 512-byte blocks, the default unit for -size). This will list the size and then the file name. You could avoid the need for -d by adding -type f to the find command, of course.

can you add HTTPS functionality to a python flask web server?

this also works in a pinch

from flask import Flask, jsonify


from OpenSSL import SSL
context = SSL.Context(SSL.PROTOCOL_TLSv1_2)
context.use_privatekey_file('server.key')
context.use_certificate_file('server.crt')   


app = Flask(__name__)


@app.route('/')
def index():
    return 'Flask is running!'


@app.route('/data')
def names():
    data = {"names": ["John", "Jacob", "Julie", "Jennifer"]}
    return jsonify(data)


#if __name__ == '__main__':
#    app.run()
if __name__ == '__main__':  
     app.run(host='127.0.0.1', debug=True, ssl_context=context)

SSL certificate rejected trying to access GitHub over HTTPS behind firewall

If you used debian-based OS, you can simply run

apt-get install ca-certificates

Extract / Identify Tables from PDF python

You should definitely have a look at this answer of mine:

Extracting table contents from a collection of PDF files

and also have a look at all the links included therein.

Tabula/TabulaPDF is currently the best table extraction tool that is available for PDF scraping.

Unresolved external symbol in object files

POINTERS

I had this problem and solved it by using pointer. I see that this wasn't your issue but I thought I'd mention it because I sure wish it had been here when I saw this an hour ago. My issue was about declaring a static member variable without defining it (the definition needed to come after some other set ups) and of course a pointer doesn't need a definition. Equally elementary mistake :P

How can I disable selected attribute from select2() dropdown Jquery?

As the question seems unclear, I'm sorry if this answer is not directly related to the original intent.

For those using Select2 version 4+ and according to official plugin documentation, .select2("enable")is not the way to go anymore for disabling the select box (not a single option of it). It will even be completely removed from version 4.1 onward.

Quoted directy from the documentation (see https://select2.org/upgrading/migrating-from-35#select2-enable):

Select2 will respect the disabled property of the underlying select element. In order to enable or disable Select2, you should call .prop('disabled', true/false) on the element. Support for the old methods will be completely removed in Select2 4.1.

So in the previous answer's example, it should be: $('select').prop(disabled,true);

Passing parameters from jsp to Spring Controller method

Use the @RequestParam to pass a parameter to the controller handler method. In the jsp your form should have an input field with name = "id" like the following:

<input type="text" name="id" />
<input type="submit" />

Then in your controller, your handler method should be like the following:

@RequestMapping("listNotes")
public String listNotes(@RequestParam("id") int id) {
    Person person = personService.getCurrentlyAuthenticatedUser();
    model.addAttribute("person", new Person());
    model.addAttribute("listPersons", this.personService.listPersons());
    model.addAttribute("listNotes", this.notesService.listNotesBySectionId(id, person));
    return "note";
}

Please also refer to these answers and tutorial:

Listen to changes within a DIV and act accordingly

Try this

$('#D25,#E37,#E31,#F37,#E16,#E40,#F16,#F40,#E41,#F41').bind('DOMNodeInserted DOMNodeRemoved',function(){
          // your code;
       });

Do not use this. This may crash the page.

$('mydiv').bind("DOMSubtreeModified",function(){
  alert('changed');
});

Get yesterday's date using Date

Calendar cal = Calendar.getInstance();
   DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
   System.out.println("Today's date is "+dateFormat.format(cal.getTime()));

   cal.add(Calendar.DATE, -1);
   System.out.println("Yesterday's date was "+dateFormat.format(cal.getTime()));

Inserting the same value multiple times when formatting a string

>>> s1 ='arbit'
>>> s2 = 'hello world '.join( [s]*3 )
>>> print s2
arbit hello world arbit hello world arbit

How to split a string of space separated numbers into integers?

Of course you can call split, but it will return strings, not integers. Do

>>> x, y = "42 0".split()
>>> [int(x), int(y)]
[42, 0]

[int(x) for x in "42 0".split()]

Implementing a Custom Error page on an ASP.Net website

<customErrors defaultRedirect="~/404.aspx" mode="On">
    <error statusCode="404" redirect="~/404.aspx"/>
</customErrors>

Code above is only for "Page Not Found Error-404" if file extension is known(.html,.aspx etc)

Beside it you also have set Customer Errors for extension not known or not correct as

.aspwx or .vivaldo. You have to add httperrors settings in web.config

<httpErrors  errorMode="Custom"> 
       <error statusCode="404" prefixLanguageFilePath="" path="/404.aspx"         responseMode="Redirect" />
</httpErrors>
<modules runAllManagedModulesForAllRequests="true"/>

it must be inside the <system.webServer> </system.webServer>

How to do associative array/hashing in JavaScript

var associativeArray = {};
associativeArray["one"] = "First";
associativeArray["two"] = "Second";
associativeArray["three"] = "Third";

If you are coming from an object-oriented language you should check this article.

Which header file do you include to use bool type in c in linux?

bool is just a macro that expands to _Bool. You can use _Bool with no #include very much like you can use int or double; it is a C99 keyword.

The macro is defined in <stdbool.h> along with 3 other macros.

The macros defined are

bool: macro expands to _Bool
false: macro expands to 0
true: macro expands to 1
__bool_true_false_are_defined: macro expands to 1

Linq to Sql: Multiple left outer joins

I figured out how to use multiple left outer joins in VB.NET using LINQ to SQL:

Dim db As New ContractDataContext()

Dim query = From o In db.Orders _
            Group Join v In db.Vendors _
            On v.VendorNumber Equals o.VendorNumber _
            Into ov = Group _
            From x In ov.DefaultIfEmpty() _
            Group Join s In db.Status _
            On s.Id Equals o.StatusId Into os = Group _
            From y In os.DefaultIfEmpty() _
            Where o.OrderNumber >= 100000 And o.OrderNumber <= 200000 _
            Select Vendor_Name = x.Name, _
                   Order_Number = o.OrderNumber, _
                   Status_Name = y.StatusName

Turn on torch/flash on iPhone

iWasRobbed's answer is great, except there is an AVCaptureSession running in the background all the time. On my iPhone 4s it takes about 12% CPU power according to Instrument so my app took about 1% battery in a minute. In other words if the device is prepared for AV capture it's not cheap.

Using the code below my app requires 0.187% a minute so the battery life is more than 5x longer.

This code works just fine on any device (tested on both 3GS (no flash) and 4s). Tested on 4.3 in simulator as well.

#import <AVFoundation/AVFoundation.h>

- (void) turnTorchOn:(BOOL)on {

    Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice");
    if (captureDeviceClass != nil) {
        AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
        if ([device hasTorch] && [device hasFlash]){

            [device lockForConfiguration:nil];
            if (on) {
                [device setTorchMode:AVCaptureTorchModeOn];
                [device setFlashMode:AVCaptureFlashModeOn];
                torchIsOn = YES;
            } else {
                [device setTorchMode:AVCaptureTorchModeOff];
                [device setFlashMode:AVCaptureFlashModeOff];
                torchIsOn = NO;            
            }
            [device unlockForConfiguration];
        }
    }
}

Deleting row from datatable in C#

This question will give you good insights on how to delete a record from a DataTable:

DataTable, How to conditionally delete rows

It would look like this:

DataRow[] drr = dt.Select("Student=' " + id + " ' "); 
foreach (var row in drr)
   row.Delete();

Don't forget that if you want to update your database, you are going to need to call the Update command. For more information on that, see this link:

http://www.codeguru.com/forum/showthread.php?t=471027

Getting checkbox values on submit

Just for printing you can use as below :

print_r($_GET['color']);

var_dump($_GET['color']);

script to map network drive

Tomalak's answer worked great for me (+1)

I only needed to make alter it slightly for my purposes, and I didn't need a password - it's for corporate domain:

Option Explicit
Dim l: l = "Z:"
Dim s: s = "\\10.10.10.1\share"
Dim Network: Set Network = CreateObject("WScript.Network")
Dim CheckDrive: Set CheckDrive = Network.EnumNetworkDrives()
Dim DriveExists: DriveExists = False
Dim i

For i = 0 to CheckDrive.Count - 1
  If CheckDrive.Item(i) = l Then
    DriveExists = True
  End If
Next

If DriveExists = False Then
  Network.MapNetworkDrive l, s, False
Else
  MsgBox l + " Drive already mapped"
End If

Or if you want to disconnect the drive:

For i = 0 to CheckDrive.Count - 1
  If CheckDrive.Item(i) = l Then 
    WshNetwork.RemoveNetworkDrive CheckDrive.Item(i)
  End If
Next

Select a Dictionary<T1, T2> with LINQ

var dictionary = (from x in y 
                  select new SomeClass
                  {
                      prop1 = value1,
                      prop2 = value2
                  }
                  ).ToDictionary(item => item.prop1);

That's assuming that SomeClass.prop1 is the desired Key for the dictionary.

"Insufficient Storage Available" even there is lot of free space in device memory

The first thing to do is to check the details of the error message. For this you could use the LogCat App.

For me the problem was an error like

Cannot rename native library directory /data/app-lib/vmdl-... to /data/app-lib/com.xyz

The solution was to activate the common sense function in my brain and look for the com.xyz folder in the app-lib folder with ES-Explorer. I recognized that this folder was already there. So removing it solved the renaming problem and the apps can now install properly.

Stop setInterval call in JavaScript

This is how I used clearInterval() method to stop the timer after 10 seconds.

_x000D_

function startCountDown() {_x000D_
  var countdownNumberEl = document.getElementById('countdown-number');_x000D_
  var countdown = 10;_x000D_
  const interval = setInterval(() => {_x000D_
    countdown = --countdown <= 0 ? 10 : countdown;_x000D_
    countdownNumberEl.textContent = countdown;_x000D_
    if (countdown == 1) {_x000D_
      clearInterval(interval);_x000D_
    }_x000D_
  }, 1000)_x000D_
}

_x000D_

<head>_x000D_
  <body>_x000D_
    <button id="countdown-number" onclick="startCountDown();">Show Time </button>_x000D_
  </body>_x000D_
</head>

_x000D_

Implicit function declarations in C

An implicitly declared function is one that has neither a prototype nor a definition, but is called somewhere in the code. Because of that, the compiler cannot verify that this is the intended usage of the function (whether the count and the type of the arguments match). Resolving the references to it is done after compilation, at link-time (as with all other global symbols), so technically it is not a problem to skip the prototype.

It is assumed that the programmer knows what he is doing and this is the premise under which the formal contract of providing a prototype is omitted.

Nasty bugs can happen if calling the function with arguments of a wrong type or count. The most likely manifestation of this is a corruption of the stack.

Nowadays this feature might seem as an obscure oddity, but in the old days it was a way to reduce the number of header files included, hence faster compilation.

How to give ASP.NET access to a private key in a certificate in the certificate store?

Although I have attended the above, I have come to this point after many attempts. 1- If you want access to the certificate from the store, you can do this as an example 2- It is much easier and cleaner to produce the certificate and use it via a path

Asp.net Core 2.2 OR1:

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Operators;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.Prng;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.X509;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;

namespace Tursys.Pool.Storage.Api.Utility
{
    class CertificateManager
    {
        public static X509Certificate2 GetCertificate(string caller)
        {
            AsymmetricKeyParameter caPrivateKey = null;
            X509Certificate2 clientCert;
            X509Certificate2 serverCert;

            clientCert = GetCertificateIfExist("CN=127.0.0.1", StoreName.My, StoreLocation.LocalMachine);
            serverCert = GetCertificateIfExist("CN=MyROOTCA", StoreName.Root, StoreLocation.LocalMachine);
            if (clientCert == null || serverCert == null)
            {
                var caCert = GenerateCACertificate("CN=MyROOTCA", ref caPrivateKey);
                addCertToStore(caCert, StoreName.Root, StoreLocation.LocalMachine);

                clientCert = GenerateSelfSignedCertificate("CN=127.0.0.1", "CN=MyROOTCA", caPrivateKey);
                var p12 = clientCert.Export(X509ContentType.Pfx);

                addCertToStore(new X509Certificate2(p12, (string)null, X509KeyStorageFlags.Exportable | X509KeyStorageFlags.PersistKeySet), StoreName.My, StoreLocation.LocalMachine);
            }

            if (caller == "client")
                return clientCert;

            return serverCert;
        }

        public static X509Certificate2 GenerateSelfSignedCertificate(string subjectName, string issuerName, AsymmetricKeyParameter issuerPrivKey)
        {
            const int keyStrength = 2048;

            // Generating Random Numbers
            CryptoApiRandomGenerator randomGenerator = new CryptoApiRandomGenerator();
            SecureRandom random = new SecureRandom(randomGenerator);

            // The Certificate Generator
            X509V3CertificateGenerator certificateGenerator = new X509V3CertificateGenerator();

            // Serial Number
            BigInteger serialNumber = BigIntegers.CreateRandomInRange(BigInteger.One, BigInteger.ValueOf(Int64.MaxValue), random);
            certificateGenerator.SetSerialNumber(serialNumber);

            // Signature Algorithm
            //const string signatureAlgorithm = "SHA256WithRSA";
            //certificateGenerator.SetSignatureAlgorithm(signatureAlgorithm);

            // Issuer and Subject Name
            X509Name subjectDN = new X509Name(subjectName);
            X509Name issuerDN = new X509Name(issuerName);
            certificateGenerator.SetIssuerDN(issuerDN);
            certificateGenerator.SetSubjectDN(subjectDN);

            // Valid For
            DateTime notBefore = DateTime.UtcNow.Date;
            DateTime notAfter = notBefore.AddYears(2);

            certificateGenerator.SetNotBefore(notBefore);
            certificateGenerator.SetNotAfter(notAfter);

            // Subject Public Key
            AsymmetricCipherKeyPair subjectKeyPair;
            var keyGenerationParameters = new KeyGenerationParameters(random, keyStrength);
            var keyPairGenerator = new RsaKeyPairGenerator();
            keyPairGenerator.Init(keyGenerationParameters);
            subjectKeyPair = keyPairGenerator.GenerateKeyPair();

            certificateGenerator.SetPublicKey(subjectKeyPair.Public);

            // Generating the Certificate
            AsymmetricCipherKeyPair issuerKeyPair = subjectKeyPair;

            ISignatureFactory signatureFactory = new Asn1SignatureFactory("SHA512WITHRSA", issuerKeyPair.Private, random);
            // selfsign certificate
            Org.BouncyCastle.X509.X509Certificate certificate = certificateGenerator.Generate(signatureFactory);


            // correcponding private key
            PrivateKeyInfo info = PrivateKeyInfoFactory.CreatePrivateKeyInfo(subjectKeyPair.Private);


            // merge into X509Certificate2
            X509Certificate2 x509 = new System.Security.Cryptography.X509Certificates.X509Certificate2(certificate.GetEncoded());

            Asn1Sequence seq = (Asn1Sequence)Asn1Object.FromByteArray(info.PrivateKeyAlgorithm.GetDerEncoded());
            if (seq.Count != 9)
            {
                //throw new PemException("malformed sequence in RSA private key");
            }

            RsaPrivateKeyStructure rsa = RsaPrivateKeyStructure.GetInstance(info.ParsePrivateKey());
            RsaPrivateCrtKeyParameters rsaparams = new RsaPrivateCrtKeyParameters(
                rsa.Modulus, rsa.PublicExponent, rsa.PrivateExponent, rsa.Prime1, rsa.Prime2, rsa.Exponent1, rsa.Exponent2, rsa.Coefficient);

            try
            {
                var rsap = DotNetUtilities.ToRSA(rsaparams);
                x509 = x509.CopyWithPrivateKey(rsap);

                //x509.PrivateKey = ToDotNetKey(rsaparams);
            }
            catch(Exception ex)
            {
                ;
            }
            //x509.PrivateKey = DotNetUtilities.ToRSA(rsaparams);
            return x509;

        }

        public static AsymmetricAlgorithm ToDotNetKey(RsaPrivateCrtKeyParameters privateKey)
        {
            var cspParams = new CspParameters
            {
                KeyContainerName = Guid.NewGuid().ToString(),
                KeyNumber = (int)KeyNumber.Exchange,
                Flags = CspProviderFlags.UseMachineKeyStore
            };

            var rsaProvider = new RSACryptoServiceProvider(cspParams);
            var parameters = new RSAParameters
            {
                Modulus = privateKey.Modulus.ToByteArrayUnsigned(),
                P = privateKey.P.ToByteArrayUnsigned(),
                Q = privateKey.Q.ToByteArrayUnsigned(),
                DP = privateKey.DP.ToByteArrayUnsigned(),
                DQ = privateKey.DQ.ToByteArrayUnsigned(),
                InverseQ = privateKey.QInv.ToByteArrayUnsigned(),
                D = privateKey.Exponent.ToByteArrayUnsigned(),
                Exponent = privateKey.PublicExponent.ToByteArrayUnsigned()
            };

            rsaProvider.ImportParameters(parameters);
            return rsaProvider;
        }

        public static X509Certificate2 GenerateCACertificate(string subjectName, ref AsymmetricKeyParameter CaPrivateKey)
        {
            const int keyStrength = 2048;

            // Generating Random Numbers
            CryptoApiRandomGenerator randomGenerator = new CryptoApiRandomGenerator();
            SecureRandom random = new SecureRandom(randomGenerator);

            // The Certificate Generator
            X509V3CertificateGenerator certificateGenerator = new X509V3CertificateGenerator();

            // Serial Number
            BigInteger serialNumber = BigIntegers.CreateRandomInRange(BigInteger.One, BigInteger.ValueOf(Int64.MaxValue), random);
            certificateGenerator.SetSerialNumber(serialNumber);

            // Signature Algorithm
            //const string signatureAlgorithm = "SHA256WithRSA";
            //certificateGenerator.SetSignatureAlgorithm(signatureAlgorithm);

            // Issuer and Subject Name
            X509Name subjectDN = new X509Name(subjectName);
            X509Name issuerDN = subjectDN;
            certificateGenerator.SetIssuerDN(issuerDN);
            certificateGenerator.SetSubjectDN(subjectDN);

            // Valid For
            DateTime notBefore = DateTime.UtcNow.Date;
            DateTime notAfter = notBefore.AddYears(2);

            certificateGenerator.SetNotBefore(notBefore);
            certificateGenerator.SetNotAfter(notAfter);

            // Subject Public Key
            AsymmetricCipherKeyPair subjectKeyPair;
            KeyGenerationParameters keyGenerationParameters = new KeyGenerationParameters(random, keyStrength);
            RsaKeyPairGenerator keyPairGenerator = new RsaKeyPairGenerator();
            keyPairGenerator.Init(keyGenerationParameters);
            subjectKeyPair = keyPairGenerator.GenerateKeyPair();

            certificateGenerator.SetPublicKey(subjectKeyPair.Public);

            // Generating the Certificate
            AsymmetricCipherKeyPair issuerKeyPair = subjectKeyPair;

            // selfsign certificate
            //Org.BouncyCastle.X509.X509Certificate certificate = certificateGenerator.Generate(issuerKeyPair.Private, random);

            ISignatureFactory signatureFactory = new Asn1SignatureFactory("SHA512WITHRSA", issuerKeyPair.Private, random);
            // selfsign certificate
            Org.BouncyCastle.X509.X509Certificate certificate = certificateGenerator.Generate(signatureFactory);


            X509Certificate2 x509 = new System.Security.Cryptography.X509Certificates.X509Certificate2(certificate.GetEncoded());

            CaPrivateKey = issuerKeyPair.Private;

            return x509;
            //return issuerKeyPair.Private;

        }

        public static bool addCertToStore(System.Security.Cryptography.X509Certificates.X509Certificate2 cert, System.Security.Cryptography.X509Certificates.StoreName st, System.Security.Cryptography.X509Certificates.StoreLocation sl)
        {
            bool bRet = false;

            try
            {
                X509Store store = new X509Store(st, sl);
                store.Open(OpenFlags.ReadWrite);
                store.Add(cert);

                store.Close();
            }
            catch
            {

            }

            return bRet;
        }

        protected internal static X509Certificate2 GetCertificateIfExist(string subjectName, StoreName store, StoreLocation location)
        {
            using (var certStore = new X509Store(store, location))
            {
                certStore.Open(OpenFlags.ReadOnly);
                var certCollection = certStore.Certificates.Find(
                                           X509FindType.FindBySubjectDistinguishedName, subjectName, false);
                X509Certificate2 certificate = null;
                if (certCollection.Count > 0)
                {
                    certificate = certCollection[0];
                }
                return certificate;
            }
        }

    }
}

OR 2:

    services.AddDataProtection()
//.PersistKeysToFileSystem(new DirectoryInfo(@"c:\temp-keys"))
.ProtectKeysWithCertificate(
        new X509Certificate2(Path.Combine(Directory.GetCurrentDirectory(), "clientCert.pfx"), "Password")
        )
.UnprotectKeysWithAnyCertificate(
        new X509Certificate2(Path.Combine(Directory.GetCurrentDirectory(), "clientCert.pfx"), "Password")
        );

How to make space between LinearLayout children?

You just need to wrap items with linear layouts which have layout_weight. To have items horizontally separated, use this

<LinearLayout
    ...
    ...
  <LinearLayout
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      android:layout_weight="1"
      android:gravity="center">

      // your item

  </LinearLayout>
</LinearLayout>

How do you append rows to a table using jQuery?

I always use this code below for more readable

$('table').append([
'<tr>',
    '<td>My Item 1</td>',
    '<td>My Item 2</td>',
    '<td>My Item 3</td>',
    '<td>My Item 4</td>',
'</tr>'
].join(''));

or if it have tbody

$('table').find('tbody').append([
'<tr>',
    '<td>My Item 1</td>',
    '<td>My Item 2</td>',
    '<td>My Item 3</td>',
    '<td>My Item 4</td>',
'</tr>'
].join(''));

How do I get out of 'screen' without typing 'exit'?

Ctrl + A, Ctrl + \ - Exit screen and terminate all programs in this screen. It is helpful, for example, if you need to close a tty connection.
Ctrl + D, D or - Ctrl + A, Ctrl + D - "minimize" screen and screen -r to restore it.

FILE, LINE, and FUNCTION usage in C++

FYI: g++ offers the non-standard __PRETTY_FUNCTION__ macro. Until just now I did not know about C99 __func__ (thanks Evan!). I think I still prefer __PRETTY_FUNCTION__ when it's available for the extra class scoping.

PS:

static string  getScopedClassMethod( string thePrettyFunction )
{
  size_t index = thePrettyFunction . find( "(" );
  if ( index == string::npos )
    return thePrettyFunction;  /* Degenerate case */

  thePrettyFunction . erase( index );

  index = thePrettyFunction . rfind( " " );
  if ( index == string::npos )
    return thePrettyFunction;  /* Degenerate case */

  thePrettyFunction . erase( 0, index + 1 );

  return thePrettyFunction;   /* The scoped class name. */
}

Electron: jQuery is not defined

If you are using Angular2 you can create a new js file with this code:

// jquery-electron.js

if ((!window.jQuery || !window.$) && (!!module && !!module.exports)) {
      window.jQuery = window.$ = module.exports;
}

and put it right after jquery path, in .angular-cli.json:

"scripts": [
    "../node_modules/jquery/dist/jquery.js",
    "assets/js/jquery-electron.js",
    ...
    ...
]

Why boolean in Java takes only true or false? Why not 1 or 0 also?

One thing that other answers haven't pointed out is that one advantage of not treating integers as truth values is that it avoids this C / C++ bug syndrome:

int i = 0;
if (i = 1) {
    print("the sky is falling!\n");
}

In C / C++, the mistaken use of = rather than == causes the condition to unexpectedly evaluate to "true" and update i as an accidental side-effect.

In Java, that is a compilation error, because the value of the assigment i = 1 has type int and a boolean is required at that point. The only case where you'd get into trouble in Java is if you write lame code like this:

boolean ok = false;
if (ok = true) {  // bug and lame style
    print("the sky is falling!\n");
}

... which anyone with an ounce of "good taste" would write as ...

boolean ok = false;
if (ok) {
    print("the sky is falling!\n");
}

JRE installation directory in Windows

Look the answer to my previous question here

c:\> for %i in (java.exe) do @echo.   %~$PATH:i
C:\WINDOWS\system32\java.exe

Add to python path mac os x

Not sure why Matthew's solution didn't work for me (could be that I'm using OSX10.8 or perhaps something to do with macports). But I added the following to the end of the file at ~/.profile

export PYTHONPATH=/path/to/dir:$PYTHONPATH

my directory is now on the pythonpath -

my-macbook:~ aidan$ python
Python 2.7.2 (default, Jun 20 2012, 16:23:33) 
[GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/path/to/dir', ...

and I can import modules from that directory.

CSS Selector that applies to elements with two classes

Chain both class selectors (without a space in between):

.foo.bar {
    /* Styles for element(s) with foo AND bar classes */
}

If you still have to deal with ancient browsers like IE6, be aware that it doesn't read chained class selectors correctly: it'll only read the last class selector (.bar in this case) instead, regardless of what other classes you list.

To illustrate how other browsers and IE6 interpret this, consider this CSS:

* {
    color: black;
}

.foo.bar {
    color: red;
}

Output on supported browsers is:

<div class="foo">Hello Foo</div>       <!-- Not selected, black text [1] -->
<div class="foo bar">Hello World</div> <!-- Selected, red text [2] -->
<div class="bar">Hello Bar</div>       <!-- Not selected, black text [3] -->

Output on IE6 is:

<div class="foo">Hello Foo</div>       <!-- Not selected, black text [1] -->
<div class="foo bar">Hello World</div> <!-- Selected, red text [2] -->
<div class="bar">Hello Bar</div>       <!-- Selected, red text [2] -->

Footnotes:

Supported browsers:
1. Not selected as this element only has class foo.
2. Selected as this element has both classes foo and bar.
3. Not selected as this element only has class bar.
IE6:
1. Not selected as this element doesn't have class bar.
2. Selected as this element has class bar, regardless of any other classes listed.

How to use multiple conditions (With AND) in IIF expressions in ssrs

Here is an example that should give you some idea..

=IIF(First(Fields!Gender.Value,"vw_BrgyClearanceNew")="Female" and 
(First(Fields!CivilStatus.Value,"vw_BrgyClearanceNew")="Married"),false,true)

I think you have to identify the datasource name or the table name where your data is coming from.

Where does Vagrant download its .box files to?

On Mac/Linux System, the successfully downloaded boxes are located at:

~/.vagrant.d/boxes

and unsuccessful boxes are located at:

~/.vagrant.d/tmp

On Windows systems it is located under the Users folder:

C:\Users\%userprofile%\.vagrant.d\boxes

Hope this will help. Thanks

How to get the size of a varchar[n] field in one SQL statement?

select column_name, data_type, character_maximum_length    
from INFORMATION_SCHEMA.COLUMNS
where table_name = 'Table1'

How to implement an STL-style iterator and avoid common pitfalls?

First of all you can look here for a list of the various operations the individual iterator types need to support.

Next, when you have made your iterator class you need to either specialize std::iterator_traits for it and provide some necessary typedefs (like iterator_category or value_type) or alternatively derive it from std::iterator, which defines the needed typedefs for you and can therefore be used with the default std::iterator_traits.

disclaimer: I know some people don't like cplusplus.com that much, but they provide some really useful information on this.

How do I switch between command and insert mode in Vim?

Coming from emacs I've found that I like ctrl + keys to do stuff, and in vim I've found that both [ctrl + C] and [alt + backspace] will enter Normal mode from insert mode. You might try and see if any of those works out for you.

Sass nth-child nesting

I'd be careful about trying to get too clever here. I think it's confusing as it is and using more advanced nth-child parameters will only make it more complicated. As for the background color I'd just set that to a variable.

Here goes what I came up with before I realized trying to be too clever might be a bad thing.

#romtest {
 $bg: #e5e5e5;
 .detailed {
    th {
      &:nth-child(-2n+6) {
        background-color: $bg;
      }
    }
    td {
      &:nth-child(3n), &:nth-child(2), &:nth-child(7) {
        background-color: $bg;
      }
      &.last {
        &:nth-child(-2n+4){
          background-color: $bg;
        }
      }
    }
  }
}

and here is a quick demo: http://codepen.io/anon/pen/BEImD

----EDIT----

Here's another approach to avoid retyping background-color:

#romtest {
  %highlight {
    background-color: #e5e5e5; 
  }
  .detailed {
    th {
      &:nth-child(-2n+6) {
        @extend %highlight;
      }
    }

    td {
      &:nth-child(3n), &:nth-child(2), &:nth-child(7) {
        @extend %highlight;
      }
      &.last {
        &:nth-child(-2n+4){
          @extend %highlight;
        }
      }
    }
  }
}

How to remove CocoaPods from a project?

pictorial representation detailed

How do I get a class instance of generic type T?

Here is a working solution:

@SuppressWarnings("unchecked")
private Class<T> getGenericTypeClass() {
    try {
        String className = ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0].getTypeName();
        Class<?> clazz = Class.forName(className);
        return (Class<T>) clazz;
    } catch (Exception e) {
        throw new IllegalStateException("Class is not parametrized with generic type!!! Please use extends <> ");
    }
}

NOTES: Can be used only as superclass

Has to be extended with typed class (Child extends Generic<Integer>)

Has to be created as anonymous implementation (new Generic<Integer>() {};)

How do I fix "The expression of type List needs unchecked conversion...'?

It looks like SyndFeed is not using generics.

You could either have an unsafe cast and a warning suppression:

@SuppressWarnings("unchecked")
List<SyndEntry> entries = (List<SyndEntry>) sf.getEntries();

or call Collections.checkedList - although you'll still need to suppress the warning:

@SuppressWarnings("unchecked")
List<SyndEntry> entries = Collections.checkedList(sf.getEntries(), SyndEntry.class);

Don't understand why UnboundLocalError occurs (closure)

Python has lexical scoping by default, which means that although an enclosed scope can access values in its enclosing scope, it cannot modify them (unless they're declared global with the global keyword).

A closure binds values in the enclosing environment to names in the local environment. The local environment can then use the bound value, and even reassign that name to something else, but it can't modify the binding in the enclosing environment.

In your case you are trying to treat counter as a local variable rather than a bound value. Note that this code, which binds the value of x assigned in the enclosing environment, works fine:

>>> x = 1

>>> def f():
>>>  return x

>>> f()
1

Required maven dependencies for Apache POI to work

No, you don't have to include all of POI's dependencies. Maven's transitive dependency mechanism will take care of that. As noted you just have to express a dependency on the appropriate POI artifact. For example:

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.8-beta4</version>
</dependency>

Edit(UPDATE): I don't know about previous versions but to resolve imports to XSSFWorkbook and other classes in org.apache.poi package you need to add dependency for poi-ooxml too. The dependencies will be:

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.2</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.2</version>
</dependency>

Use python requests to download CSV

From a little search, that I understand the file should be opened in universal newline mode, which you cannot directly do with a response content (I guess).

To finish the task, you can either save the downloaded content to a temporary file, or process it in memory.

Save as file:

import requests
import csv
import os

temp_file_name = 'temp_csv.csv'
url = 'http://url.to/file.csv'
download = requests.get(url)

with open(temp_file_name, 'w') as temp_file:
    temp_file.writelines(download.content)

with open(temp_file_name, 'rU') as temp_file:
    csv_reader = csv.reader(temp_file, dialect=csv.excel_tab)
    for line in csv_reader:
        print line

# delete the temp file after process
os.remove(temp_file_name)

In memory:

(To be updated)

Can you force Vue.js to reload/re-render?

just add this code:

this.$forceUpdate()

GoodLuck

Where is android_sdk_root? and how do I set it.?

android_sdk_root is a system variable which points to root folder of android sdk tools. You probably get the error because the variable is not set. To set it in Android Studio go to:

File -> project Structure into Project Structure
Left -> SDK Location
SDK location select Android SDK location

If you have installed android SDK please refer to this answer to find the path to it: https://stackoverflow.com/a/15702396/3625900

Create table in SQLite only if it doesn't exist already

From http://www.sqlite.org/lang_createtable.html:

CREATE TABLE IF NOT EXISTS some_table (id INTEGER PRIMARY KEY AUTOINCREMENT, ...);

How to change MenuItem icon in ActionBar programmatically

Kotlin version:

toolbar.menu.findItem(R.id.notification).icon =
                    ContextCompat.getDrawable(requireContext(), R.drawable.ic_notification)

toolbar.menu.findItem(R.id.notification).isVisible = true

Excel concatenation quotes

Try this:

CONCATENATE(""""; B2 ;"""")

@widor provided a nice solution alternative too - integrated with mine:

CONCATENATE(char(34); B2 ;char(34))

Convert array of integers to comma-separated string

.NET 4

string.Join(",", arr)

.NET earlier

string.Join(",", Array.ConvertAll(arr, x => x.ToString()))

Can not connect to local PostgreSQL

My gut feeling is that this is (again) a mac/OSX-thing: the front end and the back end assume a different location for the unix-domain socket (which functions as a rendezvous point).

Checklist:

Is postgres running: ps aux | grep postgres | grep -v grep should do the trick
Where is the socket located: find / -name .s.PGSQL.5432 -ls (the socket used to be in /tmp; you could start looking there)
even if you locate the (unix-domain) socket, the client could use a different location. (this happens if you mix distributions, or of you have a distribution installed someplace and have another (eg from source) installation elsewhere), with client and server using different rendez-vous addresses.

If postgres is running, and the socket actually exists, you could use:

psql -h /the/directory/where/the/socket/was/found mydbname

(which attempts to connect to the unix-domain socket)

; you should now get the psql prompt: try \d and then \q to quit. You could also try:

psql -h localhost mydbname.

(which attempts to connect to localhost (127.0.0.1)

If these attempts fail because of insufficient authorisation, you could alter pg_hba.conf (and SIGHUP or restart) In this case: also check the logs.

A similar question: Can't get Postgres started

Note: If you can get to the psql prompt, the quick fix to this problem is just to change your config/database.yml, add:

host: localhost

or you could try adding:

host: /the/directory/where/the/socket/was/found

In my case, host: /tmp

How do you change the size of figures drawn with matplotlib?

Since Matplotlib isn't able to use the metric system natively, if you want to specify the size of your figure in a reasonable unit of length such as centimeters, you can do the following (code from gns-ank):

def cm2inch(*tupl):
    inch = 2.54
    if isinstance(tupl[0], tuple):
        return tuple(i/inch for i in tupl[0])
    else:
        return tuple(i/inch for i in tupl)

Then you can use:

plt.figure(figsize=cm2inch(21, 29.7))

Unlimited Bash History

std::string formatting like sprintf

Based on the answer provided by Erik Aronesty:

std::string string_format(const std::string &fmt, ...) {
    std::vector<char> str(100,'\0');
    va_list ap;
    while (1) {
        va_start(ap, fmt);
        auto n = vsnprintf(str.data(), str.size(), fmt.c_str(), ap);
        va_end(ap);
        if ((n > -1) && (size_t(n) < str.size())) {
            return str.data();
        }
        if (n > -1)
            str.resize( n + 1 );
        else
            str.resize( str.size() * 2);
    }
    return str.data();
}

This avoids the need to cast away const from the result of .c_str() which was in the original answer.

How to globally replace a forward slash in a JavaScript string?

This has worked for me in turning "//" into just "/".

str.replace(/\/\//g, '/');

How to decompile an APK or DEX file on Android platform?

You can decompile an apk on Android device using this : https://play.google.com/store/apps/details?id=com.njlabs.showjava

For more info look here: http://forum.xda-developers.com/showthread.php?t=2601315

EDIT: 28-02-2015

For decompiling an apk you can use this tool: https://apkstudio.codeplex.com/license

If that doesnt help check this link

How do I center text vertically and horizontally in Flutter?

Text element inside Center of SizedBox work much better way, below Sample code

Widget build(BuildContext context) {
    return RawMaterialButton(
      fillColor: Colors.green,
      splashColor: Colors.greenAccent,
      shape: new CircleBorder(),
      child: Padding(
        padding: EdgeInsets.all(10.0),
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            SizedBox(
              width: 100.0,
              height: 100.0,
              child: Center(
                child: Text(
                widget.buttonText,
                maxLines: 1,
                style: TextStyle(color: Colors.white)
              ),
              )
          )]
        ),
    ),
  onPressed: widget.onPressed
);
}

Enjoy coding ?

Unable to connect to SQL Express "Error: 26-Error Locating Server/Instance Specified)

Have you Disabled the VIA setting in the SQL configuration manager? If not, do disable it first (if VIA is enabled, you cannot get connected) and yes TCP must be enabled. Give it a try and it should be working fine.

Make the changes only for that's particular instance name.

Cheers!

Calling Non-Static Method In Static Method In Java

The only way to call a non-static method from a static method is to have an instance of the class containing the non-static method. By definition, a non-static method is one that is called ON an instance of some class, whereas a static method belongs to the class itself.

Enterprise app deployment doesn't work on iOS 7.1

As an alternative to using Dropbox for enterprise distribution you can use TestFlight for the distribution of enterprise signed apps.

https://www.testflightapp.com/

This is a fantastic service for the hosting and distribution of both ad-hoc development builds AND enterprise builds.

How to Create a Form Dynamically Via Javascript

some thing as follows ::

Add this After the body tag

This is a rough sketch, you will need to modify it according to your needs.

<script>
var f = document.createElement("form");
f.setAttribute('method',"post");
f.setAttribute('action',"submit.php");

var i = document.createElement("input"); //input element, text
i.setAttribute('type',"text");
i.setAttribute('name',"username");

var s = document.createElement("input"); //input element, Submit button
s.setAttribute('type',"submit");
s.setAttribute('value',"Submit");

f.appendChild(i);
f.appendChild(s);

//and some more input elements here
//and dont forget to add a submit button

document.getElementsByTagName('body')[0].appendChild(f);

</script>

How to generate a Dockerfile from an image?

A bash solution :

docker history --no-trunc $argv  | tac | tr -s ' ' | cut -d " " -f 5- | sed 's,^/bin/sh -c #(nop) ,,g' | sed 's,^/bin/sh -c,RUN,g' | sed 's, && ,\n  & ,g' | sed 's,\s*[0-9]*[\.]*[0-9]*\s*[kMG]*B\s*$,,g' | head -n -1

Step by step explanations:

tac : reverse the file
tr -s ' '                                       trim multiple whitespaces into 1
cut -d " " -f 5-                                remove the first fields (until X months/years ago)
sed 's,^/bin/sh -c #(nop) ,,g'                  remove /bin/sh calls for ENV,LABEL...
sed 's,^/bin/sh -c,RUN,g'                       remove /bin/sh calls for RUN
sed 's, && ,\n  & ,g'                           pretty print multi command lines following Docker best practices
sed 's,\s*[0-9]*[\.]*[0-9]*\s*[kMG]*B\s*$,,g'      remove layer size information
head -n -1                                      remove last line ("SIZE COMMENT" in this case)

Example:

 ~ ? dih ubuntu:18.04
ADD file:28c0771e44ff530dba3f237024acc38e8ec9293d60f0e44c8c78536c12f13a0b in /
RUN set -xe
   &&  echo '#!/bin/sh' > /usr/sbin/policy-rc.d
   &&  echo 'exit 101' >> /usr/sbin/policy-rc.d
   &&  chmod +x /usr/sbin/policy-rc.d
   &&  dpkg-divert --local --rename --add /sbin/initctl
   &&  cp -a /usr/sbin/policy-rc.d /sbin/initctl
   &&  sed -i 's/^exit.*/exit 0/' /sbin/initctl
   &&  echo 'force-unsafe-io' > /etc/dpkg/dpkg.cfg.d/docker-apt-speedup
   &&  echo 'DPkg::Post-Invoke { "rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true"; };' > /etc/apt/apt.conf.d/docker-clean
   &&  echo 'APT::Update::Post-Invoke { "rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true"; };' >> /etc/apt/apt.conf.d/docker-clean
   &&  echo 'Dir::Cache::pkgcache ""; Dir::Cache::srcpkgcache "";' >> /etc/apt/apt.conf.d/docker-clean
   &&  echo 'Acquire::Languages "none";' > /etc/apt/apt.conf.d/docker-no-languages
   &&  echo 'Acquire::GzipIndexes "true"; Acquire::CompressionTypes::Order:: "gz";' > /etc/apt/apt.conf.d/docker-gzip-indexes
   &&  echo 'Apt::AutoRemove::SuggestsImportant "false";' > /etc/apt/apt.conf.d/docker-autoremove-suggests
RUN rm -rf /var/lib/apt/lists/*
RUN sed -i 's/^#\s*\(deb.*universe\)$/\1/g' /etc/apt/sources.list
RUN mkdir -p /run/systemd
   &&  echo 'docker' > /run/systemd/container
CMD ["/bin/bash"]

Programs & Examples On #Jpl

Saving binary data as file using JavaScript from a browser

Using curl POST with variables defined in bash script functions

Excel VBA Code: Compile Error in x64 Version ('PtrSafe' attribute required)

what does this mean ? image/png;base64?

What does (function($) {})(jQuery); mean?

Display an array in a readable/hierarchical format

Handling JSON Post Request in Go

Format number to always show 2 decimal places

How to increment a pointer address and pointer's value?

Git Checkout warning: unable to unlink files, permission denied

Copying formula to the next row when inserting a new row

How to apply style classes to td classes?

How to place a JButton at a desired location in a JFrame using Java

How to test an Internet connection with bash?

How can I execute Shell script in Jenkinsfile?

Adding onClick event dynamically using jQuery

Linq to SQL how to do "where [column] in (list of values)"

Why does Java's hashCode() in String use 31 as a multiplier?

Parsing arguments to a Java command line program

USB Debugging option greyed out

What is the dual table in Oracle?

UPDATE multiple tables in MySQL using LEFT JOIN

How to use subList()

How to list the size of each file and directory and sort by descending size in Bash?

How to access elements of a JArray (or iterate over them)

How to check if a std::thread is still running?

Error 1920 service failed to start. Verify that you have sufficient privileges to start system services

Convert a string to a double - is this possible?

How do you stop tracking a remote branch in Git?

jQuery 'each' loop with JSON array

Brief code but full-featured

How do you stylize a font in Swift?

Delete the 'first' record from a table in SQL Server, without a WHERE condition

Padding between ActionBar's home icon and title

cocoapods - 'pod install' takes forever

Add day(s) to a Date object

How to insert a value that contains an apostrophe (single quote)?

C# Public Enums in Classes

Remove an onclick listener

What is the difference between & vs @ and = in angularJS

Postman addon's like in firefox

Python - Get path of root project structure

Convert String to java.util.Date

How do I convert a date/time to epoch time (unix time/seconds since 1970) in Perl?

Switch statement fallthrough in C#?

How to calculate a mod b in Python?

How to query values from xml nodes?

Add placeholder text inside UITextView in Swift?

Flask Python Buttons

django order_by query set, ascending and descending

How do I call paint event?

Command /Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1

Ctrl+click doesn't work in Eclipse Juno

How to run Linux commands in Java?

Running command line silently with VbScript and getting output?

How to get a list of installed android applications and pick one to run

How to find Max Date in List<Object>?

Obtain smallest value from array in Javascript?

Why doesn't document.addEventListener('load', function) work in a greasemonkey script?

Preventing iframe caching in browser

What's alternative to angular.copy in Angular

How to split a string in Haskell?

NodeJS - What does "socket hang up" actually mean?

Range of values in C Int and Long 32 - 64 bits

What is float in Java?

do-while loop in R

How to clear out session on log out

shorthand If Statements: C#

How to evaluate a math expression given in string form?

Using $state methods with $stateChangeStart toState and fromState in Angular ui-router

Suggestion 1

Suggestion 2

How to get max value of a column using Entity Framework?

how to select first N rows from a table in T-SQL?

Set IDENTITY_INSERT ON is not working

How do I move a file (or folder) from one folder to another in TortoiseSVN?

How do I convert a string to enum in TypeScript?

Multiple controllers with AngularJS in single page app

facebook Uncaught OAuthException: An active access token must be used to query information about the current user