Android WebView Cookie Problem

After some time researching I've gathered some pieces that made me get to this solution. Once that CookieSyncManager is deprecated, this may be the best way to set a specific cookie for a webview in Kotlin nowadays, you shouldn't need anything else.

private fun setCookie(){
    val webView = WebView(this) // this = context
    val cookieManager = CookieManager.getInstance()
    cookieManager.acceptCookie()

    val domain = "https://www.yourdomain.com/"

    webView.webViewClient = WebViewClient()
    webView.settings.javaScriptEnabled = true

    cookieManager.setCookie(domain,"$cookieKey=$cookieValue")
    cookieManager.setAcceptThirdPartyCookies(webView, true)

    webView.loadUrl(domain)
}

Java: Get first item from a collection

In java 8:

Optional<String> firstElement = collection.stream().findFirst();

For older versions of java, there is a getFirst method in Guava Iterables:

Iterables.getFirst(iterable, defaultValue)

How to determine whether a Pandas Column contains a particular value

I did a few simple tests:

In [10]: x = pd.Series(range(1000000))

In [13]: timeit 999999 in x.values
567 µs ± 25.6 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

In [15]: timeit x.isin([999999]).any()
9.54 ms ± 291 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

In [16]: timeit (x == 999999).any()
6.86 ms ± 107 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

In [17]: timeit 999999 in set(x)
79.8 ms ± 1.98 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)

In [21]: timeit x.eq(999999).any()
7.03 ms ± 33.7 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

In [22]: timeit x.eq(9).any()
7.04 ms ± 60 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)

In [24]: timeit 9 in x.values
666 µs ± 15.7 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

Interestingly it doesn't matter if you look up 9 or 999999, it seems like it takes about the same amount of time using the in syntax (must be using binary search)

In [24]: timeit 9 in x.values
666 µs ± 15.7 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

In [25]: timeit 9999 in x.values
647 µs ± 5.21 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

In [26]: timeit 999999 in x.values
642 µs ± 2.11 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

In [27]: timeit 99199 in x.values
644 µs ± 5.31 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

In [28]: timeit 1 in x.values
667 µs ± 20.8 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)

Seems like using x.values is the fastest, but maybe there is a more elegant way in pandas?

How can I pad an int with leading zeros when using cout << operator?

cout.fill( '0' );    
cout.width( 3 );
cout << value;

Pass form data to another page with php

The best way to accomplish that is to use POST which is a method of Hypertext Transfer Protocol https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods

index.php

<html>
<body>

<form action="site2.php" method="post">
Name: <input type="text" name="name">
Email: <input type="text" name="email">
<input type="submit">
</form>

</body>
</html>

site2.php

 <html>
 <body>

 Hello <?php echo $_POST["name"]; ?>!<br>
 Your mail is <?php echo $_POST["mail"]; ?>.

 </body>
 </html>

output

Hello "name" !

Your email is "[email protected]" .

Import error: No module name urllib2

For a script working with Python 2 (tested versions 2.7.3 and 2.6.8) and Python 3 (3.2.3 and 3.3.2+) try:

#! /usr/bin/env python

try:
    # For Python 3.0 and later
    from urllib.request import urlopen
except ImportError:
    # Fall back to Python 2's urllib2
    from urllib2 import urlopen

html = urlopen("http://www.google.com/")
print(html.read())

Can Android do peer-to-peer ad-hoc networking?

I don't think it provides a multi-hop wireless packet routing environment. However you can try to integrate a simple routing mechanism. Just check out Wi-Share to get an idea how it can be done.

Search for string within text column in MySQL

When you are using the wordpress prepare line, the above solutions do not work. This is the solution I used:

   $Table_Name    = $wpdb->prefix.'tablename';
   $SearchField = '%'. $YourVariable . '%';   
   $sql_query     = $wpdb->prepare("SELECT * FROM $Table_Name WHERE ColumnName LIKE %s", $SearchField) ;
 $rows = $wpdb->get_results($sql_query, ARRAY_A);

Connection reset by peer: mod_fcgid: error reading data from FastCGI server

I came across this one while debugging a virtualmin/apache related error.

In my case, I am running virtualmin and had in my virtual machine's php.ini safe_mode=On.

In my Virtual Machine's error log, I was getting the fcgi Connection reset by peer: mod_fcgid: error reading data from FastCGI server

In my main apache error log I was getting: PHP Fatal error: Directive 'safe_mode' is no longer available in PHP in Unknown on line 0

In my case, I simply set safe_mode = Off in my php.ini and restarted apache.

stackoverflow.com/questions/18683177/where-to-start-with-deprecated-directive-safe-mode-on-line-0-in-apache-error

Open Facebook Page in Facebook App (if installed) on Android

you can use this:

try {
                Intent followIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("fb://facewebmodal/f?href=" +
                        "https://www.facebook.com/app_scoped_user_id/"+scoped user id+"/"));
                activity.startActivity(followIntent);
            } catch (Exception e) {
                activity.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.facebook.com/" + user name)));
                String errorMessage = (e.getMessage() == null) ? "Message is empty" : e.getMessage();
            }

attention: you can get scoped user id from "link" permission facebook api

How to add Date Picker Bootstrap 3 on MVC 5 project using the Razor engine?

This answer simply applies the type=date attribute to the HTML input element and relies on the browser to supply a date picker. Note that even in 2017, not all browsers provide their own date picker, so you may want to provide a fall back.

All you have to do is add attributes to the property in the view model. Example for variable Ldate:

[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
Public DateTime Ldate {get;set;}

Assuming you're using MVC 5 and Visual Studio 2013.

What is the difference between C and embedded C?

Embedded C is generally an extension of the C language, they are more or less similar. However, some differences do exist, such as:

C is generally used for desktop computers, while embedded C is for microcontroller based applications.
C can use the resources of a desktop PC like memory, OS, etc. While, embedded C has to use with the limited resources, such as RAM, ROM, I/Os on an embedded processor.
Embedded C includes extra features over C, such as fixed point types, multiple memory areas, and I/O register mapping.
Compilers for C (ANSI C) typically generate OS dependant executables. Embedded C requires compilers to create files to be downloaded to the microcontrollers/microprocessors where it needs to run.

Refer difference between C and embedded C

Convert string to date in bash

This worked for me :

date -d '20121212 7 days'
date -d '12-DEC-2012 7 days'
date -d '2012-12-12 7 days'
date -d '2012-12-12 4:10:10PM 7 days'
date -d '2012-12-12 16:10:55 7 days'

then you can format output adding parameter '+%Y%m%d'

What is Hash and Range Primary Key?

A well-explained answer is already given by @mkobit, but I will add a big picture of the range key and hash key.

In a simple words range + hash key = composite primary key CoreComponents of Dynamodb

A primary key is consists of a hash key and an optional range key. Hash key is used to select the DynamoDB partition. Partitions are parts of the table data. Range keys are used to sort the items in the partition, if they exist.

So both have a different purpose and together help to do complex query. In the above example hashkey1 can have multiple n-range. Another example of range and hashkey is game, userA(hashkey) can play Ngame(range)

The Music table described in Tables, Items, and Attributes is an example of a table with a composite primary key (Artist and SongTitle). You can access any item in the Music table directly, if you provide the Artist and SongTitle values for that item.

A composite primary key gives you additional flexibility when querying data. For example, if you provide only the value for Artist, DynamoDB retrieves all of the songs by that artist. To retrieve only a subset of songs by a particular artist, you can provide a value for Artist along with a range of values for SongTitle.

https://www.slideshare.net/InfoQ/amazon-dynamodb-design-patterns-best-practices https://www.slideshare.net/AmazonWebServices/awsome-day-2016-module-4-databases-amazon-dynamodb-and-amazon-rds https://ceyhunozgun.blogspot.com/2017/04/implementing-object-persistence-with-dynamodb.html

How do I set up Visual Studio Code to compile C++ code?

There's now a C/C++ language extension from Microsoft. You can install it by going to the "quick open" thing (Ctrl+p) and typing:

ext install cpptools

You can read about it here:

https://blogs.msdn.microsoft.com/vcblog/2016/03/31/cc-extension-for-visual-studio-code/

It's very basic, as of May 2016.

Make Bootstrap Popover Appear/Disappear on Hover instead of Click

After trying a few of these answers and finding they don't scale well with multiple links (for example the accepted answer requires a line of jquery for every link you have), I came across a way that requires minimal code to get working, and it also appears to work perfectly, at least on Chrome.

You add this line to activate it:

$('[data-toggle="popover"]').popover();

And these settings to your anchor links:

data-toggle="popover" data-trigger="hover"

See it in action here, I'm using the same imports as the accepted answer so it should work fine on older projects.

How to force a html5 form validation without submitting it via jQuery

To check all the required fields of form without using submit button you can use below function.

You have to assign required attribute to the controls.

  $("#btnSave").click(function () {
    $(":input[required]").each(function () {                     
        var myForm = $('#form1');
        if (!$myForm[0].checkValidity()) 
          {                
            $(myForm).submit();              
          }
        });
  });

How to position a div scrollbar on the left hand side?

No, you can't change scrollbars placement without any additional issues.

You can change text-direction to right-to-left ( rtl ), but it also change text position inside block.

This code can helps you, but I not sure it works in all browsers and OS.

<element style="direction: rtl; text-align: left;" />

Extract substring in Bash

Ok, here goes pure Parameter Substitution with an empty string. Caveat is that I have defined someletters and moreletters as only characters. If they are alphanumeric, this will not work as it is.

filename=someletters_12345_moreletters.ext
substring=${filename//@(+([a-z])_|_+([a-z]).*)}
echo $substring
12345

Failed to install android-sdk: "java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema"

If you don't want to change your Java version (I don't), you can temporarily change the version in your shell:

First run

/usr/libexec/java_home -V

Then pick a major version if you have it installed, otherwise install it first:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

Now you can run sdkmanager.

How to pass a type as a method parameter in Java

You should pass a Class...

private void foo(Class<?> t){
    if(t == String.class){ ... }
    else if(t == int.class){ ... }
}

private void bar()
{
   foo(String.class);
}

What are the differences between a superkey and a candidate key?

Super key is the combination of fields by which the row is uniquely identified and the candidate key is the minimal super key.

How to correct "TypeError: 'NoneType' object is not subscriptable" in recursive function?

One of the values you pass on to Ancestors becomes None at some point, it says, so check if otu, tree, tree[otu] or tree[otu][0] are None in the beginning of the function instead of only checking tree[otu][0][0] == None. But perhaps you should reconsider your path of action and the datatype in question to see if you could improve the structure somewhat.

Synchronous request in Node.js

Super Request

This is another synchronous module that is based off of request and uses promises. Super simple to use, works well with mocha tests.

npm install super-request

request("http://domain.com")
    .post("/login")
    .form({username: "username", password: "password"})
    .expect(200)
    .expect({loggedIn: true})
    .end() //this request is done 
    //now start a new one in the same session 
    .get("/some/protected/route")
    .expect(200, {hello: "world"})
    .end(function(err){
        if(err){
            throw err;
        }
    });

Compare DATETIME and DATE ignoring time portion

Though I upvoted the answer marked as correct. I wanted to touch on a few things for anyone stumbling upon this.

In general, if you're filtering specifically on Date values alone. Microsoft recommends using the language neutral format of ymd or y-m-d.

Note that the form '2007-02-12' is considered language-neutral only for the data types DATE, DATETIME2, and DATETIMEOFFSET.

To do a date comparison using the aforementioned approach is simple. Consider the following, contrived example.

--112 is ISO format 'YYYYMMDD'
declare @filterDate char(8) = CONVERT(char(8), GETDATE(), 112)

select 
    * 
from 
    Sales.Orders
where
    CONVERT(char(8), OrderDate, 112) = @filterDate

In a perfect world, performing any manipulation to the filtered column should be avoided because this can prevent SQL Server from using indexes efficiently. That said, if the data you're storing is only ever concerned with the date and not time, consider storing as DATETIME with midnight as the time. Because:

When SQL Server converts the literal to the filtered column’s type, it assumes midnight when a time part isn’t indicated. If you want such a filter to return all rows from the specified date, you need to ensure that you store all values with midnight as the time.

Thus, assuming you are only concerned with date, and store your data as such. The above query can be simplified to:

--112 is ISO format 'YYYYMMDD'
declare @filterDate char(8) = CONVERT(char(8), GETDATE(), 112)

select 
    * 
from 
    Sales.Orders
where
    OrderDate = @filterDate

"installation of package 'FILE_PATH' had non-zero exit status" in R

I had the same problem, but the answer from @little_chemist helped me sorting it out. When installing packages from a file in a unix OS (Ubuntu 18.04 for me), the file can not be zipped. You are using:

install.packages("/home/p/Research/14_bivpois-Rcode.zip", repos = NULL, type="source")

I noticed the solution was as simple as unzipping the package. Additionally, unzip all (installation related?) packages inside, as @little_chemist points out. Then use install.packages:

install.packages("/home/p/Research/14_bivpois-Rcode", repos = NULL, type="source")

Hope it helps!

How to detect current state within directive

Check out angular-ui, specifically, route checking: http://angular-ui.github.io/ui-utils/

Capture key press without placing an input element on the page?

For modern JS, use `event.key`!

document.addEventListener("keypress", function onPress(event) {
    if (event.key === "z" && event.ctrlKey) {
        // Do something awesome
    }
});

NOTE: The old properties (.keyCode and .which) are Deprecated.

Mozilla Docs

Supported Browsers

iOS Swift - Get the Current Local Time and Date Timestamp

When we convert a UTC timestamp (2017-11-06 20:15:33 -08:00) into a Date object, the time zone is zeroed out to GMT. For calculating time intervals, this isn't an issue, but it can be for rendering times in the UI.

I favor the RFC3339 format (2017-11-06T20:15:33-08:00) for its universality. The date format in Swift is yyyy-MM-dd'T'HH:mm:ssXXXXX but RFC3339 allows us to take advantage of the ISO8601DateFormatter:

func getDateFromUTC(RFC3339: String) -> Date? {
    let formatter = ISO8601DateFormatter()
    return formatter.date(from: RFC3339)
}

RFC3339 also makes time-zone extraction simple:

func getTimeZoneFromUTC(RFC3339: String) -> TimeZone? {

    switch RFC3339.suffix(6) {

    case "+05:30":
        return TimeZone(identifier: "Asia/Kolkata")

    case "+05:45":
        return TimeZone(identifier: "Asia/Kathmandu")

    default:
        return nil

    }

}

There are 37 or so other time zones we'd have to account for and it's up to you to determine which ones, because there is no definitive list. Some standards count fewer time zones, some more. Most time zones break on the hour, some on the half hour, some on 0:45, some on 0:15.

We can combine the two methods above into something like this:

func getFormattedDateFromUTC(RFC3339: String) -> String? {

    guard let date = getDateFromUTC(RFC3339: RFC3339),
        let timeZone = getTimeZoneFromUTC(RFC3339: RFC3339) else {
            return nil
    }

    let formatter = DateFormatter()
    formatter.dateFormat = "h:mma EEE, MMM d yyyy"
    formatter.amSymbol = "AM"
    formatter.pmSymbol = "PM"
    formatter.timeZone = timeZone // preserve local time zone
    return formatter.string(from: date)

}

And so the string "2018-11-06T17:00:00+05:45", which represents 5:00PM somewhere in Kathmandu, will print 5:00PM Tue, Nov 6 2018, displaying the local time, regardless of where the machine is.

As an aside, I recommend storing dates as strings remotely (including Firestore which has a native date object) because, I think, remote data should agnostic to create as little friction between servers and clients as possible.

How to get multiple select box values using jQuery?

Just by one line-

var select_button_text = $('#SelectQButton option:selected')
                .toArray().map(item => item.text);

Output: ["text1", "text2"]

var select_button_text = $('#SelectQButton option:selected')
                .toArray().map(item => item.value);

Output: ["value1", "value2"]

If you use .join()

var select_button_text = $('#SelectQButton option:selected')
                .toArray().map(item => item.text).join();

Output: text1,text2,text3

Definition of "downstream" and "upstream"

In terms of source control, you're "downstream" when you copy (clone, checkout, etc) from a repository. Information flowed "downstream" to you.

When you make changes, you usually want to send them back "upstream" so they make it into that repository so that everyone pulling from the same source is working with all the same changes. This is mostly a social issue of how everyone can coordinate their work rather than a technical requirement of source control. You want to get your changes into the main project so you're not tracking divergent lines of development.

Sometimes you'll read about package or release managers (the people, not the tool) talking about submitting changes to "upstream". That usually means they had to adjust the original sources so they could create a package for their system. They don't want to keep making those changes, so if they send them "upstream" to the original source, they shouldn't have to deal with the same issue in the next release.

What is ":-!!" in C code?

This is, in effect, a way to check whether the expression e can be evaluated to be 0, and if not, to fail the build.

The macro is somewhat misnamed; it should be something more like BUILD_BUG_OR_ZERO, rather than ...ON_ZERO. (There have been occasional discussions about whether this is a confusing name.)

You should read the expression like this:

sizeof(struct { int: -!!(e); }))

(e): Compute expression e.
!!(e): Logically negate twice: 0 if e == 0; otherwise 1.
-!!(e): Numerically negate the expression from step 2: 0 if it was 0; otherwise -1.
struct{int: -!!(0);} --> struct{int: 0;}: If it was zero, then we declare a struct with an anonymous integer bitfield that has width zero. Everything is fine and we proceed as normal.
struct{int: -!!(1);} --> struct{int: -1;}: On the other hand, if it isn't zero, then it will be some negative number. Declaring any bitfield with negative width is a compilation error.

So we'll either wind up with a bitfield that has width 0 in a struct, which is fine, or a bitfield with negative width, which is a compilation error. Then we take sizeof that field, so we get a size_t with the appropriate width (which will be zero in the case where e is zero).

Some people have asked: Why not just use an assert?

keithmo's answer here has a good response:

These macros implement a compile-time test, while assert() is a run-time test.

Exactly right. You don't want to detect problems in your kernel at runtime that could have been caught earlier! It's a critical piece of the operating system. To whatever extent problems can be detected at compile time, so much the better.

How can I implement prepend and append with regular JavaScript?

Here's a snippet to get you going:

theParent = document.getElementById("theParent");
theKid = document.createElement("div");
theKid.innerHTML = 'Are we there yet?';

// append theKid to the end of theParent
theParent.appendChild(theKid);

// prepend theKid to the beginning of theParent
theParent.insertBefore(theKid, theParent.firstChild);

theParent.firstChild will give us a reference to the first element within theParent and put theKid before it.

How to multiply a BigDecimal by an integer in Java

First off, BigDecimal.multiply() returns a BigDecimal and you're trying to store that in an int.

Second, it takes another BigDecimal as the argument, not an int.

If you just use the BigDecimal for all variables involved in these calculations, it should work fine.

Truncating long strings with CSS: feasible yet?

OK, Firefox 7 implemented text-overflow: ellipsis as well as text-overflow: "string". Final release is planned for 2011-09-27.

How can I add comments in MySQL?

From here you can use

#  For single line comments
-- Also for single line, must be followed by space/control character
/*
    C-style multiline comment
*/

Why is my Button text forced to ALL CAPS on Lollipop?

Use this line android:textAllCaps="false" in your xml

<Button
            android:id="@+id/btn_login"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/login_str"
            android:background="@color/colorBlue"
            android:textColor="@color/colorWhite"
            android:textAllCaps="false"
           />

How to write to the Output window in Visual Studio?

Use the OutputDebugString function or the TRACE macro (MFC) which lets you do printf-style formatting:

int x = 1;
int y = 16;
float z = 32.0;
TRACE( "This is a TRACE statement\n" );    
TRACE( "The value of x is %d\n", x );
TRACE( "x = %d and y = %d\n", x, y );
TRACE( "x = %d and y = %x and z = %f\n", x, y, z );

Wrap long lines in Python

def fun():
    print(('{0} Here is a really long '
           'sentence with {1}').format(3, 5))

Adjacent string literals are concatenated at compile time, just as in C. http://docs.python.org/reference/lexical_analysis.html#string-literal-concatenation is a good place to start for more info.

How to escape double quotes in a title attribute

It may work with any character from the HTML Escape character list, but I had the same problem with a Java project. I used StringEscapeUtils.escapeHTML("Testing \" <br> <p>") and the title was <a href=".." title="Test" <br> <p>">Testing</a>.

It only worked for me when I changed the StringEscapeUtils to StringEscapeUtils.escapeJavascript("Testing \" <br> <p>") and it worked in every browser.

List and kill at jobs on UNIX

To delete a job which has not yet run, you need the atrm command. You can use atq command to get its number in the at list.

To kill a job which has already started to run, you'll need to grep for it using:

ps -eaf | grep <command name>

and then use kill to stop it.

A quicker way to do this on most systems is:

pkill <command name>

NULL value for int in Update statement

If this is nullable int field then yes.

update TableName
set FiledName = null
where Id = SomeId

How do I simply create a patch from my latest git commit?

SQLSTATE[42S22]: Column not found: 1054 Unknown column - Laravel

You don't have a field named user_email in the members table ... as for why, I'm not sure as the code "looks" like it should try to join on different fields

Does the Auth::attempt method perform a join of the schema? Run grep -Rl 'class Auth' /path/to/framework and find where the attempt method is and what it does.

Modulo operation with negative numbers

In Mathematics, where these conventions stem from, there is no assertion that modulo arithmetic should yield a positive result.

Eg.

1 mod 5 = 1, but it can also equal -4. That is, 1/5 yields a remainder 1 from 0 or -4 from 5. (Both factors of 5)

Similarly, -1 mod 5 = -1, but it can also equal 4. That is, -1/5 yields a remainder -1 from 0 or 4 from -5. (Both factors of 5)

For further reading look into equivalence classes in Mathematics.

How do I set response headers in Flask?

This was how added my headers in my flask application and it worked perfectly

@app.after_request
def add_header(response):
    response.headers['X-Content-Type-Options'] = 'nosniff'
    return response

Difference between .dll and .exe?

Both DLL and EXE are Portable Executable(PE) Formats

A Dynamic-link library (DLL) is a library and therefore can not be executed directly. If you try to run it you will get an error about a missing entry point. It needs an entry point (main function) to get executed, that entry point can be any application or exe. DLL binding occurs at run-time. That is why its called "Dynamic Link" library.

An Executable (EXE) is a program that can be executed. It has its own entry point. A flag inside the PE header indicates which type of file it is (irrelevant of file extension). The PE header has a field where the entry point for the program resides. In DLLs it isn't used (or at least not as an entry point).

There are many software available to check header information. The only difference causing both to work differently is the bit in header as shown in below diagram.

EXE file has only single main entry means it is isolated application, when a system launches exe, a new process is created while DLLs have many entry points so when application use it no new process started, DLL can be reused and versioned. DLL reduces storage space as different programs can use the same dll.

What's the fastest way to do a bulk insert into Postgres?

It mostly depends on the (other) activity in the database. Operations like this effectively freeze the entire database for other sessions. Another consideration is the datamodel and the presence of constraints,triggers, etc.

My first approach is always: create a (temp) table with a structure similar to the target table (create table tmp AS select * from target where 1=0), and start by reading the file into the temp table. Then I check what can be checked: duplicates, keys that already exist in the target, etc.

Then I just do a "do insert into target select * from tmp" or similar.

If this fails, or takes too long, I abort it and consider other methods (temporarily dropping indexes/constraints, etc)

What is the difference between JavaScript and jQuery?

Javascript is a programming language whereas jQuery is a library to help make writing in javascript easier. It's particularly useful for simply traversing the DOM in an HTML page.

What are the differences between the BLOB and TEXT datatypes in MySQL?

TEXT and CHAR will convert to/from the character set they have associated with time. BLOB and BINARY simply store bytes.

BLOB is used for storing binary data while Text is used to store large string.

BLOB values are treated as binary strings (byte strings). They have no character set, and sorting and comparison are based on the numeric values of the bytes in column values.

TEXT values are treated as nonbinary strings (character strings). They have a character set, and values are sorted and compared based on the collation of the character set.

http://dev.mysql.com/doc/refman/5.0/en/blob.html

Increase max execution time for php

Try to set a longer max_execution_time:

<IfModule mod_php5.c>
    php_value max_execution_time 300
</IfModule>

<IfModule mod_php7.c>
    php_value max_execution_time 300
</IfModule>

Angular2: Cannot read property 'name' of undefined

The variable selectedHero is null in the template so you cannot bind selectedHero.name as is. You need to use the elvis operator ?. for this case:

<input [ngModel]="selectedHero?.name" (ngModelChange)="selectedHero.name = $event" />

The separation of the [(ngModel)] into [ngModel] and (ngModelChange) is also needed because you can't assign to an expression that uses the elvis operator.

I also think you mean to use:

<h2>{{selectedHero?.name}} details!</h2>

instead of:

<h2>{{hero.name}} details!</h2>

How to initialize a list of strings (List<string>) with many string values

You haven't really asked a question, but the code should be

List<string> optionList = new List<string> { "string1", "string2", ..., "stringN"};

i.e. no trailing () after the list.

Request exceeded the limit of 10 internal redirects due to probable configuration error

I just found a solution to the problem here:

http://willcodeforcoffee.com/2007/01/31/cakephp-error-500-too-many-redirects/

The .htaccess file in webroot should look like:

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteBase /
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ index.php?url=$1 [QSA,L]
</IfModule>

instead of this:

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteBase /projectname
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ index.php?url=$1 [QSA,L]
</IfModule>

How to find the last field using 'cut'

Use a parameter expansion. This is much more efficient than any kind of external command, cut (or grep) included.

data=foo,bar,baz,qux
last=${data##*,}

See BashFAQ #100 for an introduction to native string manipulation in bash.

python: NameError:global name '...‘ is not defined

You need to call self.a() to invoke a from b. a is not a global function, it is a method on the class.

You may want to read through the Python tutorial on classes some more to get the finer details down.

mysql after insert trigger which updates another table's column

DELIMITER //

CREATE TRIGGER contacts_after_insert
AFTER INSERT
   ON contacts FOR EACH ROW

BEGIN

   DECLARE vUser varchar(50);

   -- Find username of person performing the INSERT into table
   SELECT USER() INTO vUser;

   -- Insert record into audit table
   INSERT INTO contacts_audit
   ( contact_id,
     deleted_date,
     deleted_by)
   VALUES
   ( NEW.contact_id,
     SYSDATE(),
     vUser );

END; //

DELIMITER ;

The following sections have been defined but have not been rendered for the layout page "~/Views/Shared/_Layout.cshtml": "Scripts"

Also, you can add the following line to the _Layout.cshtml or _Layout.Mobile.cshtml:

@RenderSection("scripts", required: false)

How can I split and parse a string in Python?

"2.7.0_bf4fda703454".split("_") gives a list of strings:

In [1]: "2.7.0_bf4fda703454".split("_")
Out[1]: ['2.7.0', 'bf4fda703454']

This splits the string at every underscore. If you want it to stop after the first split, use "2.7.0_bf4fda703454".split("_", 1).

If you know for a fact that the string contains an underscore, you can even unpack the LHS and RHS into separate variables:

In [8]: lhs, rhs = "2.7.0_bf4fda703454".split("_", 1)

In [9]: lhs
Out[9]: '2.7.0'

In [10]: rhs
Out[10]: 'bf4fda703454'

An alternative is to use partition(). The usage is similar to the last example, except that it returns three components instead of two. The principal advantage is that this method doesn't fail if the string doesn't contain the separator.

how to fix stream_socket_enable_crypto(): SSL operation failed with code 1

in my case i did following

$mail = new PHPMailer;
$mail->isSMTP();            
$mail->Host = '<YOUR HOST>';
$mail->Port = 587;
$mail->SMTPAuth = true;
$mail->Username = '<USERNAME>';
$mail->Password = '<PASSWORD>';
$mail->SMTPSecure = '';
$mail->smtpConnect([
    'ssl' => [
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    ]
]);
$mail->smtpClose();

$mail->From = '<[email protected]>';
$mail->FromName = '<MAIL FROM NAME>';

$mail->addAddress("<[email protected]>", '<SEND TO>');

$mail->isHTML(true);
$mail->Subject= '<SUBJECTHERE>';
$mail->Body =  '<h2>Test Mail</h2>';
$isSend = $mail->send();

How can I plot with 2 different y-axes?

As its name suggests, twoord.plot() in the plotrix package plots with two ordinate axes.

library(plotrix)
example(twoord.plot)

enter image description here

Why do I get a "permission denied" error while installing a gem?

I had the same problem using rvm on Ubuntu, was fixed by setting the source on my terminal as a short-term solution:

source $HOME/.rvm/scripts/rvm

source /home/$USER/.rvm/scripts/rvm

and configure a default Ruby Version, 2.3.3 in my case.

rvm use 2.3.3 --default

And a long-term Solution is to add your source to your .bashrc file to permanently make Ubuntu look in .rvm for all the Ruby files.

Add:

source .rvm/scripts/rvm

into

$HOME/.bashrc file.

How to recover the deleted files using "rm -R" command in linux server?

Short answer: You can't. rm removes files blindly, with no concept of 'trash'.

Some Unix and Linux systems try to limit its destructive ability by aliasing it to rm -i by default, but not all do.

Long answer: Depending on your filesystem, disk activity, and how long ago the deletion occured, you may be able to recover some or all of what you deleted. If you're using an EXT3 or EXT4 formatted drive, you can check out extundelete.

In the future, use rm with caution. Either create a del alias that provides interactivity, or use a file manager.

VBA shorthand for x=x+1?

Sadly there are no operation-assignment operators in VBA.

(Addition-assignment += are available in VB.Net)

Pointless workaround;

Sub Inc(ByRef i As Integer)
   i = i + 1  
End Sub
...
Static value As Integer
inc value
inc value

Prevent direct access to a php include file

The best way to prevent direct access to files is to place them outside of the web-server document root (usually, one level above). You can still include them, but there is no possibility of someone accessing them through an http request.

I usually go all the way, and place all of my PHP files outside of the document root aside from the bootstrap file - a lone index.php in the document root that starts routing the entire website/application.

Oracle insert from select into table with more columns

just select '0' as the value for the desired column

jQuery ui dialog change title after load-callback

Even better!

    jQuery( "#dialog" ).attr('title', 'Error');
    jQuery( "#dialog" ).text('You forgot to enter your first name');

jQuery.getJSON - Access-Control-Allow-Origin Issue

You may well want to use JSON-P instead (see below). First a quick explanation.

The header you've mentioned is from the Cross Origin Resource Sharing standard. Beware that it is not supported by some browsers people actually use, and on other browsers (Microsoft's, sigh) it requires using a special object (XDomainRequest) rather than the standard XMLHttpRequest that jQuery uses. It also requires that you change server-side resources to explicitly allow the other origin (www.xxxx.com).

To get the JSON data you're requesting, you basically have three options:

If possible, you can be maximally-compatible by correcting the location of the files you're loading so they have the same origin as the document you're loading them into. (I assume you must be loading them via Ajax, hence the Same Origin Policy issue showing up.)
Use JSON-P, which isn't subject to the SOP. jQuery has built-in support for it in its ajax call (just set dataType to "jsonp" and jQuery will do all the client-side work). This requires server side changes, but not very big ones; basically whatever you have that's generating the JSON response just looks for a query string parameter called "callback" and wraps the JSON in JavaScript code that would call that function. E.g., if your current JSON response is:
```
{"weather": "Dreary start but soon brightening into a fine summer day."}
```
Your script would look for the "callback" query string parameter (let's say that the parameter's value is "jsop123") and wraps that JSON in the syntax for a JavaScript function call:
```
jsonp123({"weather": "Dreary start but soon brightening into a fine summer day."});
```
That's it. JSON-P is very broadly compatible (because it works via JavaScript script tags). JSON-P is only for GET, though, not POST (again because it works via script tags).
Use CORS (the mechanism related to the header you quoted). Details in the specification linked above, but basically:

A. The browser will send your server a "preflight" message using the OPTIONS HTTP verb (method). It will contain the various headers it would send with the GET or POST as well as the headers "Origin", "Access-Control-Request-Method" (e.g., GET or POST), and "Access-Control-Request-Headers" (the headers it wants to send).

B. Your PHP decides, based on that information, whether the request is okay and if so responds with the "Access-Control-Allow-Origin", "Access-Control-Allow-Methods", and "Access-Control-Allow-Headers" headers with the values it will allow. You don't send any body (page) with that response.

C. The browser will look at your response and see whether it's allowed to send you the actual GET or POST. If so, it will send that request, again with the "Origin" and various "Access-Control-Request-xyz" headers.

D. Your PHP examines those headers again to make sure they're still okay, and if so responds to the request.

In pseudo-code (I haven't done much PHP, so I'm not trying to do PHP syntax here):
```
// Find out what the request is asking for
corsOrigin = get_request_header("Origin")
corsMethod = get_request_header("Access-Control-Request-Method")
corsHeaders = get_request_header("Access-Control-Request-Headers")
if corsOrigin is null or "null" {
    // Requests from a `file://` path seem to come through without an
    // origin or with "null" (literally) as the origin.
    // In my case, for testing, I wanted to allow those and so I output
    // "*", but you may want to go another way.
    corsOrigin = "*"
}

// Decide whether to accept that request with those headers
// If so:

// Respond with headers saying what's allowed (here we're just echoing what they
// asked for, except we may be using "*" [all] instead of the actual origin for
// the "Access-Control-Allow-Origin" one)
set_response_header("Access-Control-Allow-Origin", corsOrigin)
set_response_header("Access-Control-Allow-Methods", corsMethod)
set_response_header("Access-Control-Allow-Headers", corsHeaders)
if the HTTP request method is "OPTIONS" {
    // Done, no body in response to OPTIONS
    stop
}
// Process the GET or POST here; output the body of the response
```
Again stressing that this is pseudo-code.

What is the error "Every derived table must have its own alias" in MySQL?

Every derived table (AKA sub-query) must indeed have an alias. I.e. each query in brackets must be given an alias (AS whatever), which can the be used to refer to it in the rest of the outer query.

SELECT ID FROM (
    SELECT ID, msisdn FROM (
        SELECT * FROM TT2
    ) AS T
) AS T

In your case, of course, the entire query could be replaced with:

SELECT ID FROM TT2

JavaScript alert not working in Android WebView

Check this link , and last comment , You have to use WebChromeClient for your purpose.

How to start Apache and MySQL automatically when Windows 8 comes up

Find/search for file "xampp-control.ini" where you installed XAMPP server (e.g., D:\Server or C:\xampp).

Then edit in n the [Autostart] section:

Apache=1
MySQL=1
FileZilla=0
Mercury=0
Tomcat=0

Where 1 = true and 0 = false

That's so simple.

fail to change placeholder color with Bootstrap 3

There was an issue posted here about this: https://github.com/twbs/bootstrap/issues/14107

The issue was solved by this commit: https://github.com/twbs/bootstrap/commit/bd292ca3b89da982abf34473318c77ace3417fb5

The solution therefore is to override it back to #999 and not white as suggested (and also overriding all bootstraps styles, not just for webkit-styles):

.form-control::-moz-placeholder {
  color: #999;
}
.form-control:-ms-input-placeholder {
  color: #999;
}
.form-control::-webkit-input-placeholder {
  color: #999;
}

Using awk to print all columns from the nth to the last

Because of a wrong most upvoted anwser with 340 votes, I just lost 5 minutes of my life! Did anybody try this answer out before upvoting this? Apparantly not. Completely useless.

I have a log where after $5 with an IP address can be more text or no text. I need everything from the IP address to the end of the line should there be anything after $5. In my case, this is actualy withn an awk program, not an awk oneliner so awk must solve the problem. When I try to remove the first 4 fields using the most upvoted but completely wrong answer:

echo "  7 27.10.16. Thu 11:57:18 37.244.182.218" | awk '{$1=$2=$3=$4=""; printf "[%s]\n", $0}'

it spits out wrong and useless response (I added [..] to demonstrate):

[    37.244.182.218 one two three]

There are even some sugestions to combine substr with this wrong answer. Like that complication is an improvement.

Instead, if columns are fixed width until the cut point and awk is needed, the correct answer is:

echo "  7 27.10.16. Thu 11:57:18 37.244.182.218" | awk '{printf "[%s]\n", substr($0,28)}'

which produces the desired output:

[37.244.182.218 one two three]

Check table exist or not before create it in Oracle

Any solution which relies on testing before creation can run into a 'race' condition where another process creates the table between you testing that it does not exists and creating it. - Minor point I know.

How to re-create database for Entity Framework?

While this question is premised by not caring about the data, sometimes maintenance of the data is essential.

If so, I wrote a list of steps on how to recover from Entity Framework nightmare when the database already has tables with the same name here: How to recover from Entity Framework nightmare - database already has tables with the same name

Apparently... a moderator saw fit to delete my post so I'll paste it here:

How to recover from Entity Framework nightmare - database already has tables with the same name

Description: If you're like us when your team is new to EF, you'll end up in a state where you either can't create a new local database or you can't apply updates to your production database. You want to get back to a clean EF environment and then stick to basics, but you can't. If you get it working for production, you can't create a local db, and if you get it working for local, your production server gets out of sync. And finally, you don't want to delete any production server data.

Symptom: Can't run Update-Database because it's trying to run the creation script and the database already has tables with the same name.

Error Message: System.Data.SqlClient.SqlException (0x80131904): There is already an object named '' in the database.

Problem Background: EF understands where the current database is at compared to where the code is at based on a table in the database called dbo.__MigrationHistory. When it looks at the Migration Scripts, it tries to reconsile where it was last at with the scripts. If it can't, it just tries to apply them in order. This means, it goes back to the initial creation script and if you look at the very first part in the UP command, it'll be the CreeateTable for the table that the error was occurring on.

To understand this in more detail, I'd recommend watching both videos referenced here: https://msdn.microsoft.com/en-us/library/dn481501(v=vs.113).aspx

Solution: What we need to do is to trick EF into thinking that the current database is up to date while not applying these CreateTable commands. At the same time, we still want those commands to exist so we can create new local databases.

Step 1: Production DB clean First, make a backup of your production db. In SSMS, Right-Click on the database, Select "Tasks > Export Data-tier application..." and follow the prompts. Open your production database and delete/drop the dbo.__MigrationHistory table.

Step 2: Local environment clean Open your migrations folder and delete it. I'm assuming you can get this all back from git if necessary.

Step 3: Recreate Initial In the Package Manager, run "Enable-Migrations" (EF will prompt you to use -ContextTypeName if you have multiple contexts). Run "Add-Migration Initial -verbose". This will Create the initial script to create the database from scratch based on the current code. If you had any seed operations in the previous Configuration.cs, then copy that across.

Step 4: Trick EF At this point, if we ran Update-Database, we'd be getting the original error. So, we need to trick EF into thinking that it's up to date, without running these commands. So, go into the Up method in the Initial migration you just created and comment it all out.

Step 5: Update-Database With no code to execute on the Up process, EF will create the dbo.__MigrationHistory table with the correct entry to say that it ran this script correctly. Go and check it out if you like. Now, uncomment that code and save. You can run Update-Database again if you want to check that EF thinks its up to date. It won't run the Up step with all of the CreateTable commands because it thinks it's already done this.

Step 6: Confirm EF is ACTUALLY up to date If you had code that hadn't yet had migrations applied to it, this is what I did...

Run "Add-Migration MissingMigrations" This will create practically an empty script. Because the code was there already, there was actually the correct commands to create these tables in the initial migration script, so I just cut the CreateTable and equivalent drop commands into the Up and Down methods.

Now, run Update-Database again and watch it execute your new migration script, creating the appropriate tables in the database.

Step 7: Re-confirm and commit. Build, test, run. Ensure that everything is running then commit the changes.

Step 8: Let the rest of your team know how to proceed. When the next person updates, EF won't know what hit it given that the scripts it had run before don't exist. But, assuming that local databases can be blown away and re-created, this is all good. They will need to drop their local database and add create it from EF again. If they had local changes and pending migrations, I'd recommend they create their DB again on master, switch to their feature branch and re-create those migration scripts from scratch.

creating batch script to unzip a file without additional zip tools

Another approach to this issue could be to create a self extracting executable (.exe) using something like winzip and use this as the install vector rather than the zip file. Similarly, you could use NSIS to create an executable installer and use that instead of the zip.

Python - Get Yesterday's date as a string in YYYY-MM-DD format

Calling .isoformat() on a date object will give you YYYY-MM-DD

from datetime import date, timedelta
(date.today() - timedelta(1)).isoformat()

Resize to fit image in div, and center horizontally and vertically

This is one way to do it:

Fiddle here: http://jsfiddle.net/4Mvan/1/

HTML:

<div class='container'>
    <a href='#'>
    <img class='resize_fit_center'
      src='http://i.imgur.com/H9lpVkZ.jpg' />
    </a>
</div>

CSS:

.container {
    margin: 10px;
    width: 115px;
    height: 115px;
    line-height: 115px;
    text-align: center;
    border: 1px solid red;
}
.resize_fit_center {
    max-width:100%;
    max-height:100%;
    vertical-align: middle;
}

Develop Android app using C#

Having used Mono, I would NOT recommend it. The Mono runtime is bundled with your app, so your apk ends up being bloated at more than 6MB. A better programming solution for C# would be dot42. Both Mono and dot42 are licensed products.

Personally, I would recommend using Java with the IntelliJ IDEA dev environment. I say this for 3 reasons:

There is so much Java code out there for Android already; do yourself a favour and don't re-invent the wheel.
IDEA is similar enough to Visual Studio as to be a cinch to learn; it is made by JetBrains and the intelli-sense is better than VS.
IDEA is free.

I have been a C# programmer for 12 years and started developing for Android with C# but ended up jumping ship and going the Java route. The languages are so similar you really won't notice much of a learning curve.

P.S. If you want to use LINQ, serialization and other handy features that are native to C# then you just need to look for the equivalent java library.

Password Strength Meter

Update: created a js fiddle here to see it live: http://jsfiddle.net/HFMvX/

I went through tons of google searches and didn't find anything satisfying. i like how passpack have done it so essentially reverse-engineered their approach, here we go:

function scorePassword(pass) {
    var score = 0;
    if (!pass)
        return score;

    // award every unique letter until 5 repetitions
    var letters = new Object();
    for (var i=0; i<pass.length; i++) {
        letters[pass[i]] = (letters[pass[i]] || 0) + 1;
        score += 5.0 / letters[pass[i]];
    }

    // bonus points for mixing it up
    var variations = {
        digits: /\d/.test(pass),
        lower: /[a-z]/.test(pass),
        upper: /[A-Z]/.test(pass),
        nonWords: /\W/.test(pass),
    }

    var variationCount = 0;
    for (var check in variations) {
        variationCount += (variations[check] == true) ? 1 : 0;
    }
    score += (variationCount - 1) * 10;

    return parseInt(score);
}

Good passwords start to score around 60 or so, here's function to translate that in words:

function checkPassStrength(pass) {
    var score = scorePassword(pass);
    if (score > 80)
        return "strong";
    if (score > 60)
        return "good";
    if (score >= 30)
        return "weak";

    return "";
}

you might want to tune this a bit but i found it working for me nicely

Move UIView up when the keyboard appears in iOS

Here you go. I have used this code with UIView, though. You should be able to make those adjustments for scrollview.

    func addKeyboardNotifications() {
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(keyboardWillShow(notification:)),
                                               name: NSNotification.Name.UIKeyboardWillShow, object: nil)
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(keyboardWillHide(notification:)),
                                               name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    }

    func keyboardWillShow(notification: NSNotification) {

        if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
            let duration = notification.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! Double
// if using constraints            
// bottomViewBottomSpaceConstraint.constant = keyboardSize.height
self.view.frame.origin.y -= keyboardSize.height
            UIView.animate(withDuration: duration) {
                self.view.layoutIfNeeded()
            }
        }
    }
    func keyboardWillHide(notification: NSNotification) {

        let duration = notification.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! Double
//if using constraint
//        bottomViewBottomSpaceConstraint.constant = 0
self.view.frame.origin.y = 0
        UIView.animate(withDuration: duration) {
            self.view.layoutIfNeeded()
        }
    }

Don't forget to remove notifications at right place.

func removeKeyboardNotifications() {
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}

How do I create a timeline chart which shows multiple events? Eg. Metallica Band members timeline on wiki

A Stacked bar chart should suffice:

Setup data as follows

Name    Start       End         Duration (End - Start)
Fred    1/01/1981   1/06/1985    1612   
Bill    1/07/1985   1/11/2000    5602  
Joe     1/01/1980   1/12/2001    8005  
Jim     1/03/1999   1/01/2000    306

Plot Start and Duration as a stacked bar chart
Set the X-Axis minimum to the desired start date
Set the Fill Colour of thestart range to no fill
Set the Fill of individual bars to suit

(example prepared in Excel 2010)

enter image description here

OpenJDK availability for Windows OS

Found all the windows binaries here :

https://github.com/ojdkbuild/ojdkbuild

These Windows binaries are built to keep them as close as possible in behaviour to java-x-openjdk CentOS packages.

How to compress an image via Javascript in the browser?

I see two things missing from the other answers:

canvas.toBlob (when available) is more performant than canvas.toDataURL, and also async.
the file -> image -> canvas -> file conversion loses EXIF data; in particular, data about image rotation commonly set by modern phones/tablets.

The following script deals with both points:

// From https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob, needed for Safari:
if (!HTMLCanvasElement.prototype.toBlob) {
    Object.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {
        value: function(callback, type, quality) {

            var binStr = atob(this.toDataURL(type, quality).split(',')[1]),
                len = binStr.length,
                arr = new Uint8Array(len);

            for (var i = 0; i < len; i++) {
                arr[i] = binStr.charCodeAt(i);
            }

            callback(new Blob([arr], {type: type || 'image/png'}));
        }
    });
}

window.URL = window.URL || window.webkitURL;

// Modified from https://stackoverflow.com/a/32490603, cc by-sa 3.0
// -2 = not jpeg, -1 = no data, 1..8 = orientations
function getExifOrientation(file, callback) {
    // Suggestion from http://code.flickr.net/2012/06/01/parsing-exif-client-side-using-javascript-2/:
    if (file.slice) {
        file = file.slice(0, 131072);
    } else if (file.webkitSlice) {
        file = file.webkitSlice(0, 131072);
    }

    var reader = new FileReader();
    reader.onload = function(e) {
        var view = new DataView(e.target.result);
        if (view.getUint16(0, false) != 0xFFD8) {
            callback(-2);
            return;
        }
        var length = view.byteLength, offset = 2;
        while (offset < length) {
            var marker = view.getUint16(offset, false);
            offset += 2;
            if (marker == 0xFFE1) {
                if (view.getUint32(offset += 2, false) != 0x45786966) {
                    callback(-1);
                    return;
                }
                var little = view.getUint16(offset += 6, false) == 0x4949;
                offset += view.getUint32(offset + 4, little);
                var tags = view.getUint16(offset, little);
                offset += 2;
                for (var i = 0; i < tags; i++)
                    if (view.getUint16(offset + (i * 12), little) == 0x0112) {
                        callback(view.getUint16(offset + (i * 12) + 8, little));
                        return;
                    }
            }
            else if ((marker & 0xFF00) != 0xFF00) break;
            else offset += view.getUint16(offset, false);
        }
        callback(-1);
    };
    reader.readAsArrayBuffer(file);
}

// Derived from https://stackoverflow.com/a/40867559, cc by-sa
function imgToCanvasWithOrientation(img, rawWidth, rawHeight, orientation) {
    var canvas = document.createElement('canvas');
    if (orientation > 4) {
        canvas.width = rawHeight;
        canvas.height = rawWidth;
    } else {
        canvas.width = rawWidth;
        canvas.height = rawHeight;
    }

    if (orientation > 1) {
        console.log("EXIF orientation = " + orientation + ", rotating picture");
    }

    var ctx = canvas.getContext('2d');
    switch (orientation) {
        case 2: ctx.transform(-1, 0, 0, 1, rawWidth, 0); break;
        case 3: ctx.transform(-1, 0, 0, -1, rawWidth, rawHeight); break;
        case 4: ctx.transform(1, 0, 0, -1, 0, rawHeight); break;
        case 5: ctx.transform(0, 1, 1, 0, 0, 0); break;
        case 6: ctx.transform(0, 1, -1, 0, rawHeight, 0); break;
        case 7: ctx.transform(0, -1, -1, 0, rawHeight, rawWidth); break;
        case 8: ctx.transform(0, -1, 1, 0, 0, rawWidth); break;
    }
    ctx.drawImage(img, 0, 0, rawWidth, rawHeight);
    return canvas;
}

function reduceFileSize(file, acceptFileSize, maxWidth, maxHeight, quality, callback) {
    if (file.size <= acceptFileSize) {
        callback(file);
        return;
    }
    var img = new Image();
    img.onerror = function() {
        URL.revokeObjectURL(this.src);
        callback(file);
    };
    img.onload = function() {
        URL.revokeObjectURL(this.src);
        getExifOrientation(file, function(orientation) {
            var w = img.width, h = img.height;
            var scale = (orientation > 4 ?
                Math.min(maxHeight / w, maxWidth / h, 1) :
                Math.min(maxWidth / w, maxHeight / h, 1));
            h = Math.round(h * scale);
            w = Math.round(w * scale);

            var canvas = imgToCanvasWithOrientation(img, w, h, orientation);
            canvas.toBlob(function(blob) {
                console.log("Resized image to " + w + "x" + h + ", " + (blob.size >> 10) + "kB");
                callback(blob);
            }, 'image/jpeg', quality);
        });
    };
    img.src = URL.createObjectURL(file);
}

Example usage:

inputfile.onchange = function() {
    // If file size > 500kB, resize such that width <= 1000, quality = 0.9
    reduceFileSize(this.files[0], 500*1024, 1000, Infinity, 0.9, blob => {
        let body = new FormData();
        body.set('file', blob, blob.name || "file.jpg");
        fetch('/upload-image', {method: 'POST', body}).then(...);
    });
};

How to detect string which contains only spaces?

Trim your String value by creating a trim function

var text = "  ";
if($.trim(text.length == 0){
  console.log("Text is empty");
}
else
{
  console.log("Text is not empty");
}

Can't escape the backslash with regex?

you can use ? at the end to skip one "\"

regex("\\\\?")

Getting all files in directory with ajax

Javascript which runs on the client machine can't access the local disk file system due to security restrictions.

If you want to access the client's disk file system then look into an embedded client application which you serve up from your webpage, like an Applet, Silverlight or something like that. If you like to access the server's disk file system, then look for the solution in the server side corner using a server side programming language like Java, PHP, etc, whatever your webserver is currently using/supporting.

Syntax for async arrow function

Basic Example

folder = async () => {
    let fold = await getFold();
    //await localStorage.save('folder');
    return fold;
  };

How to check if internet connection is present in Java?

This code:

"127.0.0.1".equals(InetAddress.getLocalHost().getHostAddress().toString());

Returns - to me - true if offline, and false, otherwise. (well, I don't know if this true to all computers).

This works much faster than the other approaches, up here.

EDIT: I found this only working, if the "flip switch" (on a laptop), or some other system-defined option, for the internet connection, is off. That's, the system itself knows not to look for any IP addresses.

how to insert datetime into the SQL Database table?

You will need to have a datetime column in a table. Then you can do an insert like the following to insert the current date:

INSERT INTO MyTable (MyDate) Values (GetDate())

If it is not today's date then you should be able to use a string and specify the date format:

INSERT INTO MyTable (MyDate) Values (Convert(DateTime,'19820626',112)) --6/26/1982

You do not always need to convert the string either, often you can just do something like:

INSERT INTO MyTable (MyDate) Values ('06/26/1982')

And SQL Server will figure it out for you.

What is the difference between jQuery: text() and html() ?

**difference between text()&& html() && val()...?
#Html code..
<select id="d">
<option>Hello</option>
<option>Welcome</option>
</select>
# jquery code..
$(document).ready(function(){
   $("#d").html();
   $("#d").text();
   $("#d").val();

});

Is it possible to use "return" in stored procedure?

In Stored procedure, you return the values using OUT parameter ONLY. As you have defined two variables in your example:

   outstaticip OUT VARCHAR2, outcount OUT NUMBER

Just assign the return values to the out parameters i.e. outstaticip and outcount and access them back from calling location. What I mean here is: when you call the stored procedure, you will be passing those two variables as well. After the stored procedure call, the variables will be populated with return values.

If you want to have RETURN value as return from the PL/SQL call, then use FUNCTION. Please note that in case, you would be able to return only one variable as return variable.

How to customize an end time for a YouTube video?

Today I found, that the old ways are not working very well.

So I used: "Customize YouTube Start and End Time - Acetrot.com" from http://www.youtubestartend.com/

They provide a link into https://xxxx.app.goo.gl/yyyyyyyyyy e.g. https://v637g.app.goo.gl/Cs2SV9NEeoweNGGy9 Link contain forward to format like this https://www.youtube.com/embed/xyzabc123?start=17&end=21&version=3&autoplay=1

What is a correct MIME type for .docx, .pptx, etc.?

Just look at MDN Web Docs.

Here is a list of MIME types, associated by type of documents, ordered by their common extensions:

Common MIME types

How to manually set an authenticated user in Spring Security / SpringMVC

Ultimately figured out the root of the problem.

When I create the security context manually no session object is created. Only when the request finishes processing does the Spring Security mechanism realize that the session object is null (when it tries to store the security context to the session after the request has been processed).

At the end of the request Spring Security creates a new session object and session ID. However this new session ID never makes it to the browser because it occurs at the end of the request, after the response to the browser has been made. This causes the new session ID (and hence the Security context containing my manually logged on user) to be lost when the next request contains the previous session ID.

Difference between PCDATA and CDATA in DTD

CDATA (Character DATA): It is similarly to a comment but it is part of document. i.e. CDATA is a data, it is part of the document but the data can not parsed in XML.
Note: XML comment omits while parsing an XML but CDATA shows as it is.

PCDATA (Parsed Character DATA) :By default, everything is PCDATA. PCDATA is a data, it can be parsed in XML.

Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.sock) in

The mySQL client by default attempts to connect through a local file called a socket instead of connecting to the loopback address (127.0.0.1) for localhost.

The default location of this socket file, at least on OSX, is /tmp/mysql.sock.

QUICK, LESS ELEGANT SOLUTION

Create a symlink to fool the OS into finding the correct socket.

ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp

PROPER SOLUTION

Change the socket path defined in the startMysql.sh file in /Applications/MAMP/bin.

Remove Project from Android Studio

Easiest way to do this is close the project. Using file explorer head to the location of that project and delete.

Alot of processes, even simply deleting can be annoying to figure out in studio. Most deleting options a good work around is to delete using file explorer. This is a part of the process tht works for deleting modules as well. Which u will prob find is painful as well

Is it possible to save HTML page as PDF using JavaScript or jquery?

Here is how I would do it, its an idea not bulletproof design, you need to modify it

The user clicks the save as PDF button
The server is sent a call using ajax
The server responds with a URL for PDF generated using HTML, I have used Apache FOP very succssfully
The js handling the ajax response does a location.href to point the URL send by JS and as soon as that URL loads, it sends the file using content disposition header as attachment forcing user to download the file.

How to find index of list item in Swift?

In Swift 4, if you are traversing through your DataModel array, make sure your data model conforms to Equatable Protocol , implement the lhs=rhs method , and only then you can use ".index(of" . For example

class Photo : Equatable{
    var imageURL: URL?
    init(imageURL: URL){
        self.imageURL = imageURL
    }

    static func == (lhs: Photo, rhs: Photo) -> Bool{
        return lhs.imageURL == rhs.imageURL
    }
}

And then,

let index = self.photos.index(of: aPhoto)

Reminder - \r\n or \n\r?

If you are using C# you should use Environment.NewLine, which accordingly to MSDN it is:

A string containing "\r\n" for non-Unix platforms, or a string containing "\n" for Unix platforms.

grep without showing path/file:line

From the man page:

-h, --no-filename
    Suppress the prefixing of file names on output. This is the default when there
    is only one file (or only standard input) to search.

Insert and set value with max()+1 problems

None of the about answers works for my case. I got the answer from here, and my SQL is:

INSERT INTO product (id, catalog_id, status_id, name, measure_unit_id, description, create_time)
VALUES (
  (SELECT id FROM (SELECT COALESCE(MAX(id),0)+1 AS id FROM product) AS temp),
  (SELECT id FROM product_catalog WHERE name="AppSys1"),
  (SELECT id FROM product_status WHERE name ="active"),
  "prod_name_x",
  (SELECT id FROM measure_unit WHERE name ="unit"),
  "prod_description_y",
  UNIX_TIMESTAMP(NOW())
)

Constant pointer vs Pointer to constant

int i;
int j;

int * const ptr1 = &i;

The compiler will stop you changing ptr1.

const int * ptr2 = &i;

The compiler will stop you changing *ptr2.

ptr1 = &j; // error
*ptr1 = 7; // ok

ptr2 = &j; // ok
*ptr2 = 7; // error

Note that you can still change *ptr2, just not by literally typing *ptr2:

i = 4;
printf("before: %d\n", *ptr2); // prints 4
i = 5;
printf("after: %d\n", *ptr2); // prints 5
*ptr2 = 6; // still an error

You can also have a pointer with both features:

const int * const ptr3 = &i;

ptr3 = &j; // error
*ptr3 = 7; // error

Python equivalent to 'hold on' in Matlab

check pyplot docs. For completeness,

import numpy as np
import matplotlib.pyplot as plt

#evenly sampled time at 200ms intervals
t = np.arange(0., 5., 0.2)

# red dashes, blue squares and green triangles
plt.plot(t, t, 'r--', t, t**2, 'bs', t, t**3, 'g^')
plt.show()

How can I align the columns of tables in Bash?

To have the exact same output as you need, you need to format the file like that :

a very long string..........\t     112232432\t     anotherfield\n
a smaller string\t      123124343\t     anotherfield\n

And then using :

$ column -t -s $'\t' FILE
a very long string..........  112232432  anotherfield
a smaller string              123124343  anotherfield

How to cd into a directory with space in the name?

ok i spent some frustrating time with this problem too. My little guide.

Open desktop for example. If you didnt switch your disc in cmd, type:

cd desktop

Now if you want to display subfolders:

cd, make 1 spacebar, and press tab 2 times

Now if you want to enter directory/file with SPACE IN NAME. Lets open some file name f.g., to open it we need to type:

cd file\ name

p.s. notice this space after slash :)

How can I remove the top and right axis in matplotlib?

If you don't need ticks and such (e.g. for plotting qualitative illustrations) you could also use this quick workaround:

Make the axis invisible (e.g. with plt.gca().axison = False) and then draw them manually with plt.arrow.

How to keep an iPhone app running on background fully operational

From ioS 7 onwards, there are newer ways for apps to run in background. Apple now recognizes that apps have to constantly download and process data constantly.

Here is the new list of all the apps which can run in background.

Apps that play audible content to the user while in the background, such as a music player app

Apps that record audio content while in the background.

Apps that keep users informed of their location at all times, such as a navigation app

Apps that support Voice over Internet Protocol (VoIP)

Apps that need to download and process new content regularly

Apps that receive regular updates from external accessories

You can declare app's supported background tasks in Info.plist using X Code 5+. For eg. adding UIBackgroundModes key to your app’s Info.plist file and adding a value of 'fetch' to the array allows your app to regularly download and processes small amounts of content from the network. You can do the same in the 'capabilities' tab of Application properties in XCode 5 (attaching a snapshot)

Capabilities tab in XCode 5 You can find more about this in Apple documentation

Expected block end YAML error

In my case, the error occured when I tried to pass a variable which was looking like a bytes-object (b"xxxx") but was actually a string.

You can convert the string to a real bytes object like this:

foo.strip('b"').replace("\\n", "\n").encode()

sudo service mongodb restart gives "unrecognized service error" in ubuntu 14.0.4

This is a simple solution that worked for me with the same problem (I think): mv /var/lib/mongodb /var/lib/mongodb_backup mkdir /var/lib/mongodb chmod 700 /var/lib/mongodb chown mongodb:daemon /var/lib/mongodb systemctl restart mongodb or service mongod restart

bash, extract string before a colon

Another pure Bash solution:

while IFS=':' read a b ; do
  echo "$a"
done < "$infile" > "$outfile"

How to catch integer(0)?

Maybe off-topic, but R features two nice, fast and empty-aware functions for reducing logical vectors -- any and all:

if(any(x=='dolphin')) stop("Told you, no mammals!")

How do I completely rename an Xcode project (i.e. inclusive of folders)?

There is a GitHub project called Xcode Project Renamer:

It should be executed from inside root of Xcode project directory and called with two string parameters: $OLD_PROJECT_NAME & $NEW_PROJECT_NAME

Script goes through all the files and directories recursively, including Xcode project or workspace file and replaces all occurrences of $OLD_PROJECT_NAME string with $NEW_PROJECT_NAME string (both in each file's name and content).

DON'T FORGET TO BACKUP YOUR PROJECT!

Xcode Project Renamer

AngularJS: How do I manually set input to $valid in controller?

I came across this post w/a similar issue. My fix was to add a hidden field to hold my invalid state for me.

<input type="hidden" ng-model="vm.application.isValid" required="" />

In my case I had a nullable bool which a person had to select one of two different buttons. if they answer yes, an entity is added to the collection and the state of the button changes. Until all of the questions get answered, (one of the buttons in each of the pairs has a click) the form is not valid.

vm.hasHighSchool = function (attended) { 
  vm.application.hasHighSchool = attended;
  applicationSvc.addSchool(attended, 1, vm.application);
}

<input type="hidden" ng-model="vm.application.hasHighSchool" required="" />
<div class="row">
  <div class="col-lg-3"><label>Did You Attend High School?</label><label class="required" ng-hide="vm.application.hasHighSchool != undefined">*</label></div>
  <div class="col-lg-2">
    <button value="Yes" title="Yes" ng-click="vm.hasHighSchool(true)" class="btn btn-default" ng-class="{'btn-success': vm.application.hasHighSchool == true}">Yes</button>
    <button value="No" title="No" ng-click="vm.hasHighSchool(false)" class="btn btn-default" ng-class="{'btn-success':  vm.application.hasHighSchool == false}">No</button>
  </div>
</div>

What's the difference between passing by reference vs. passing by value?

A major difference between them is that value-type variables store values, so specifying a value-type variable in a method call passes a copy of that variable's value to the method. Reference-type variables store references to objects, so specifying a reference-type variable as an argument passes the method a copy of the actual reference that refers to the object. Even though the reference itself is passed by value, the method can still use the reference it receives to interact with—and possibly modify—the original object. Similarly, when returning information from a method via a return statement, the method returns a copy of the value stored in a value-type variable or a copy of the reference stored in a reference-type variable. When a reference is returned, the calling method can use that reference to interact with the referenced object. So, in effect, objects are always passed by reference.

In c#, to pass a variable by reference so the called method can modify the variable's, C# provides keywords ref and out. Applying the ref keyword to a parameter declaration allows you to pass a variable to a method by reference—the called method will be able to modify the original variable in the caller. The ref keyword is used for variables that already have been initialized in the calling method. Normally, when a method call contains an uninitialized variable as an argument, the compiler generates an error. Preceding a parameter with keyword out creates an output parameter. This indicates to the compiler that the argument will be passed into the called method by reference and that the called method will assign a value to the original variable in the caller. If the method does not assign a value to the output parameter in every possible path of execution, the compiler generates an error. This also prevents the compiler from generating an error message for an uninitialized variable that is passed as an argument to a method. A method can return only one value to its caller via a return statement, but can return many values by specifying multiple output (ref and/or out) parameters.

see c# discussion and examples here link text

NULL values inside NOT IN clause

The title of this question at the time of writing is

SQL NOT IN constraint and NULL values

From the text of the question it appears that the problem was occurring in a SQL DML SELECT query, rather than a SQL DDL CONSTRAINT.

However, especially given the wording of the title, I want to point out that some statements made here are potentially misleading statements, those along the lines of (paraphrasing)

When the predicate evaluates to UNKNOWN you don't get any rows.

Although this is the case for SQL DML, when considering constraints the effect is different.

Consider this very simple table with two constraints taken directly from the predicates in the question (and addressed in an excellent answer by @Brannon):

DECLARE @T TABLE 
(
 true CHAR(4) DEFAULT 'true' NOT NULL, 
 CHECK ( 3 IN (1, 2, 3, NULL )), 
 CHECK ( 3 NOT IN (1, 2, NULL ))
);

INSERT INTO @T VALUES ('true');

SELECT COUNT(*) AS tally FROM @T;

As per @Brannon's answer, the first constraint (using IN) evaluates to TRUE and the second constraint (using NOT IN) evaluates to UNKNOWN. However, the insert succeeds! Therefore, in this case it is not strictly correct to say, "you don't get any rows" because we have indeed got a row inserted as a result.

The above effect is indeed the correct one as regards the SQL-92 Standard. Compare and contrast the following section from the SQL-92 spec

7.6 where clause

The result of the is a table of those rows of T for which the result of the search condition is true.

4.10 Integrity constraints

A table check constraint is satisfied if and only if the specified search condition is not false for any row of a table.

In other words:

In SQL DML, rows are removed from the result when the WHERE evaluates to UNKNOWN because it does not satisfy the condition "is true".

In SQL DDL (i.e. constraints), rows are not removed from the result when they evaluate to UNKNOWN because it does satisfy the condition "is not false".

Although the effects in SQL DML and SQL DDL respectively may seem contradictory, there is practical reason for giving UNKNOWN results the 'benefit of the doubt' by allowing them to satisfy a constraint (more correctly, allowing them to not fail to satisfy a constraint): without this behaviour, every constraints would have to explicitly handle nulls and that would be very unsatisfactory from a language design perspective (not to mention, a right pain for coders!)

p.s. if you are finding it as challenging to follow such logic as "unknown does not fail to satisfy a constraint" as I am to write it, then consider you can dispense with all this simply by avoiding nullable columns in SQL DDL and anything in SQL DML that produces nulls (e.g. outer joins)!

ant build.xml file doesn't exist

If you couldn't find the build.xml file in your project then you have to build it to be able to debug it and get your .apk

you can use this command-line to build:

android update project -p "project full path"

where "Project full path" -- Give your full path of your project location

after this you will find the build.xml then you can debug it.

Regex to remove all special characters from string?

tmp = Regex.Replace(n, @"\W+", "");

\w matches letters, digits, and underscores, \W is the negated version.

What is a classpath and how do I set it?

For linux users, and to sum up and add to what others have said here, you should know the following:

$CLASSPATH is what Java uses to look through multiple directories to find all the different classes it needs for your script (unless you explicitly tell it otherwise with the -cp override). Using -cp requires that you keep track of all the directories manually and copy-paste that line every time you run the program (not preferable IMO).
The colon (":") character separates the different directories. There is only one $CLASSPATH and it has all the directories in it. So, when you run "export CLASSPATH=...." you want to include the current value "$CLASSPATH" in order to append to it. For example:
```
export CLASSPATH=.
export CLASSPATH=$CLASSPATH:/usr/share/java/mysql-connector-java-5.1.12.jar
```
In the first line above, you start CLASSPATH out with just a simple 'dot' which is the path to your current working directory. With that, whenever you run java it will look in the current working directory (the one you're in) for classes. In the second line above, $CLASSPATH grabs the value that you previously entered (.) and appends the path to a mysql dirver. Now, java will look for the driver AND for your classes.
```
echo $CLASSPATH
```
is super handy, and what it returns should read like a colon-separated list of all the directories, and .jar files, you want java looking in for the classes it needs.
Tomcat does not use CLASSPATH. Read what to do about that here: https://tomcat.apache.org/tomcat-8.0-doc/class-loader-howto.html

How to provide a file download from a JSF backing bean?

Introduction

You can get everything through ExternalContext. In JSF 1.x, you can get the raw HttpServletResponse object by ExternalContext#getResponse(). In JSF 2.x, you can use the bunch of new delegate methods like ExternalContext#getResponseOutputStream() without the need to grab the HttpServletResponse from under the JSF hoods.

On the response, you should set the Content-Type header so that the client knows which application to associate with the provided file. And, you should set the Content-Length header so that the client can calculate the download progress, otherwise it will be unknown. And, you should set the Content-Disposition header to attachment if you want a Save As dialog, otherwise the client will attempt to display it inline. Finally just write the file content to the response output stream.

Most important part is to call FacesContext#responseComplete() to inform JSF that it should not perform navigation and rendering after you've written the file to the response, otherwise the end of the response will be polluted with the HTML content of the page, or in older JSF versions, you will get an IllegalStateException with a message like getoutputstream() has already been called for this response when the JSF implementation calls getWriter() to render HTML.

Turn off ajax / don't use remote command!

You only need to make sure that the action method is not called by an ajax request, but that it is called by a normal request as you fire with <h:commandLink> and <h:commandButton>. Ajax requests and remote commands are handled by JavaScript which in turn has, due to security reasons, no facilities to force a Save As dialogue with the content of the ajax response.

In case you're using e.g. PrimeFaces <p:commandXxx>, then you need to make sure that you explicitly turn off ajax via ajax="false" attribute. In case you're using ICEfaces, then you need to nest a <f:ajax disabled="true" /> in the command component.

Generic JSF 2.x example

public void download() throws IOException {
    FacesContext fc = FacesContext.getCurrentInstance();
    ExternalContext ec = fc.getExternalContext();

    ec.responseReset(); // Some JSF component library or some Filter might have set some headers in the buffer beforehand. We want to get rid of them, else it may collide.
    ec.setResponseContentType(contentType); // Check http://www.iana.org/assignments/media-types for all types. Use if necessary ExternalContext#getMimeType() for auto-detection based on filename.
    ec.setResponseContentLength(contentLength); // Set it with the file size. This header is optional. It will work if it's omitted, but the download progress will be unknown.
    ec.setResponseHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\""); // The Save As popup magic is done here. You can give it any file name you want, this only won't work in MSIE, it will use current request URL as file name instead.

    OutputStream output = ec.getResponseOutputStream();
    // Now you can write the InputStream of the file to the above OutputStream the usual way.
    // ...

    fc.responseComplete(); // Important! Otherwise JSF will attempt to render the response which obviously will fail since it's already written with a file and closed.
}

Generic JSF 1.x example

public void download() throws IOException {
    FacesContext fc = FacesContext.getCurrentInstance();
    HttpServletResponse response = (HttpServletResponse) fc.getExternalContext().getResponse();

    response.reset(); // Some JSF component library or some Filter might have set some headers in the buffer beforehand. We want to get rid of them, else it may collide.
    response.setContentType(contentType); // Check http://www.iana.org/assignments/media-types for all types. Use if necessary ServletContext#getMimeType() for auto-detection based on filename.
    response.setContentLength(contentLength); // Set it with the file size. This header is optional. It will work if it's omitted, but the download progress will be unknown.
    response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\""); // The Save As popup magic is done here. You can give it any file name you want, this only won't work in MSIE, it will use current request URL as file name instead.

    OutputStream output = response.getOutputStream();
    // Now you can write the InputStream of the file to the above OutputStream the usual way.
    // ...

    fc.responseComplete(); // Important! Otherwise JSF will attempt to render the response which obviously will fail since it's already written with a file and closed.
}

Common static file example

In case you need to stream a static file from the local disk file system, substitute the code as below:

File file = new File("/path/to/file.ext");
String fileName = file.getName();
String contentType = ec.getMimeType(fileName); // JSF 1.x: ((ServletContext) ec.getContext()).getMimeType(fileName);
int contentLength = (int) file.length();

// ...

Files.copy(file.toPath(), output);

Common dynamic file example

In case you need to stream a dynamically generated file, such as PDF or XLS, then simply provide output there where the API being used expects an OutputStream.

E.g. iText PDF:

String fileName = "dynamic.pdf";
String contentType = "application/pdf";

// ...

Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, output);
document.open();
// Build PDF content here.
document.close();

E.g. Apache POI HSSF:

String fileName = "dynamic.xls";
String contentType = "application/vnd.ms-excel";

// ...

HSSFWorkbook workbook = new HSSFWorkbook();
// Build XLS content here.
workbook.write(output);
workbook.close();

Note that you cannot set the content length here. So you need to remove the line to set response content length. This is technically no problem, the only disadvantage is that the enduser will be presented an unknown download progress. In case this is important, then you really need to write to a local (temporary) file first and then provide it as shown in previous chapter.

Utility method

If you're using JSF utility library OmniFaces, then you can use one of the three convenient Faces#sendFile() methods taking either a File, or an InputStream, or a byte[], and specifying whether the file should be downloaded as an attachment (true) or inline (false).

public void download() throws IOException {
    Faces.sendFile(file, true);
}

Yes, this code is complete as-is. You don't need to invoke responseComplete() and so on yourself. This method also properly deals with IE-specific headers and UTF-8 filenames. You can find source code here.

Shortest distance between a point and a line segment

see the Matlab GEOMETRY toolbox in the following website: http://people.sc.fsu.edu/~jburkardt/m_src/geometry/geometry.html

ctrl+f and type "segment" to find line segment related functions. the functions "segment_point_dist_2d.m" and "segment_point_dist_3d.m" are what you need.

The GEOMETRY codes are available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

What is the difference between CMD and ENTRYPOINT in a Dockerfile?

The ENTRYPOINT specifies a command that will always be executed when the container starts.

The CMD specifies arguments that will be fed to the ENTRYPOINT.

If you want to make an image dedicated to a specific command you will use ENTRYPOINT ["/path/dedicated_command"]

Otherwise, if you want to make an image for general purpose, you can leave ENTRYPOINT unspecified and use CMD ["/path/dedicated_command"] as you will be able to override the setting by supplying arguments to docker run.

For example, if your Dockerfile is:

FROM debian:wheezy
ENTRYPOINT ["/bin/ping"]
CMD ["localhost"]

Running the image without any argument will ping the localhost:

$ docker run -it test
PING localhost (127.0.0.1): 48 data bytes
56 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.096 ms
56 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.088 ms
56 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.088 ms
^C--- localhost ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.088/0.091/0.096/0.000 ms

Now, running the image with an argument will ping the argument:

$ docker run -it test google.com
PING google.com (173.194.45.70): 48 data bytes
56 bytes from 173.194.45.70: icmp_seq=0 ttl=55 time=32.583 ms
56 bytes from 173.194.45.70: icmp_seq=2 ttl=55 time=30.327 ms
56 bytes from 173.194.45.70: icmp_seq=4 ttl=55 time=46.379 ms
^C--- google.com ping statistics ---
5 packets transmitted, 3 packets received, 40% packet loss
round-trip min/avg/max/stddev = 30.327/36.430/46.379/7.095 ms

For comparison, if your Dockerfile is:

FROM debian:wheezy
CMD ["/bin/ping", "localhost"]

Running the image without any argument will ping the localhost:

$ docker run -it test
PING localhost (127.0.0.1): 48 data bytes
56 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.076 ms
56 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.087 ms
56 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.090 ms
^C--- localhost ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.076/0.084/0.090/0.000 ms

But running the image with an argument will run the argument:

docker run -it test bash
root@e8bb7249b843:/#

See this article from Brian DeHamer for even more details: https://www.ctl.io/developers/blog/post/dockerfile-entrypoint-vs-cmd/

Angularjs how to upload multipart form data and a file?

It is more efficient to send the files directly.

The base64 encoding of Content-Type: multipart/form-data adds an extra 33% overhead. If the server supports it, it is more efficient to send the files directly:

Doing Multiple `$http.post` Requests Directly from a FileList

$scope.upload = function(url, fileList) {
    var config = {
      headers: { 'Content-Type': undefined },
      transformResponse: angular.identity
    };
    var promises = fileList.map(function(file) {
      return $http.post(url, file, config);
    });
    return $q.all(promises);
};

When sending a POST with a File object, it is important to set 'Content-Type': undefined. The XHR send method will then detect the File object and automatically set the content type.

Working Demo of "select-ng-files" Directive that Works with `ng-model`¹

The <input type=file> element does not by default work with the ng-model directive. It needs a custom directive:

_x000D_

angular.module("app",[]);

angular.module("app").directive("selectNgFiles", function() {
  return {
    require: "ngModel",
    link: function postLink(scope,elem,attrs,ngModel) {
      elem.on("change", function(e) {
        var files = elem[0].files;
        ngModel.$setViewValue(files);
      })
    }
  }
});

_x000D_

<script src="//unpkg.com/angular/angular.js"></script>
  <body ng-app="app">
    <h1>AngularJS Input `type=file` Demo</h1>
    
    <input type="file" select-ng-files ng-model="fileList" multiple>
    
    <h2>Files</h2>
    <div ng-repeat="file in fileList">
      {{file.name}}
    </div>
  </body>

_x000D_

HTML / CSS table with GRIDLINES

Via css. Put this inside the <head> tag.

<style type="text/css" media="screen">

table{
border-collapse:collapse;
border:1px solid #FF0000;
}

table td{
border:1px solid #FF0000;
}
</style>

How to install MinGW-w64 and MSYS2?

MSYS has not been updated a long time, MSYS2 is more active, you can download from MSYS2, it has both mingw and cygwin fork package.

To install the MinGW-w64 toolchain (Reference):

Open MSYS2 shell from start menu
Run pacman -Sy pacman to update the package database
Re-open the shell, run pacman -Syu to update the package database and core system packages
Re-open the shell, run pacman -Su to update the rest
Install compiler:
- For 32-bit target, run pacman -S mingw-w64-i686-toolchain
- For 64-bit target, run pacman -S mingw-w64-x86_64-toolchain
Select which package to install, default is all
You may also need make, run pacman -S make

Prevent BODY from scrolling when a modal is opened

Sadly none of the answers above fixed my issues.

In my situation, the web page originally has a scroll bar. Whenever I click the modal, the scroll bar won't disappear and the header will move to right a bit.

Then I tried to add .modal-open{overflow:auto;} (which most people recommended). It indeed fixed the issues: the scroll bar appears after I open the modal. However, another side effect comes out which is that "background below the header will move to the left a bit, together with another long bar behind the modal"

Luckily, after I add {padding-right: 0 !important;}, everything is fixed perfectly. Both the header and body background didn't move and the modal still keeps the scrollbar.

Hope this can help those who are still stuck with this issue. Good luck!

How do Python's any and all functions work?

You can roughly think of any and all as series of logical or and and operators, respectively.

any

any will return True when at least one of the elements is Truthy. Read about Truth Value Testing.

all

all will return True only when all the elements are Truthy.

Truth table

+-----------------------------------------+---------+---------+
|                                         |   any   |   all   |
+-----------------------------------------+---------+---------+
| All Truthy values                       |  True   |  True   |
+-----------------------------------------+---------+---------+
| All Falsy values                        |  False  |  False  |
+-----------------------------------------+---------+---------+
| One Truthy value (all others are Falsy) |  True   |  False  |
+-----------------------------------------+---------+---------+
| One Falsy value (all others are Truthy) |  True   |  False  |
+-----------------------------------------+---------+---------+
| Empty Iterable                          |  False  |  True   |
+-----------------------------------------+---------+---------+

Note 1: The empty iterable case is explained in the official documentation, like this

any

Return True if any element of the iterable is true. If the iterable is empty, return False

Since none of the elements are true, it returns False in this case.

all

Return True if all elements of the iterable are true (or if the iterable is empty).

Since none of the elements are false, it returns True in this case.

Note 2:

Another important thing to know about any and all is, it will short-circuit the execution, the moment they know the result. The advantage is, entire iterable need not be consumed. For example,

>>> multiples_of_6 = (not (i % 6) for i in range(1, 10))
>>> any(multiples_of_6)
True
>>> list(multiples_of_6)
[False, False, False]

Here, (not (i % 6) for i in range(1, 10)) is a generator expression which returns True if the current number within 1 and 9 is a multiple of 6. any iterates the multiples_of_6 and when it meets 6, it finds a Truthy value, so it immediately returns True, and rest of the multiples_of_6 is not iterated. That is what we see when we print list(multiples_of_6), the result of 7, 8 and 9.

This excellent thing is used very cleverly in this answer.

With this basic understanding, if we look at your code, you do

any(x) and not all(x)

which makes sure that, atleast one of the values is Truthy but not all of them. That is why it is returning [False, False, False]. If you really wanted to check if both the numbers are not the same,

print [x[0] != x[1] for x in zip(*d['Drd2'])]

Why does an onclick property set with setAttribute fail to work in IE?

Not relevant to the onclick issue, but also related:

For html attributes whose name collide with javascript reserved words, an alternate name is chosen, eg. <div class=''>, but div.className, or <label for='...'>, but label.htmlFor.

In reasonable browsers, this doesn't affect setAttribute. So in gecko and webkit you'd call div.setAttribute('class', 'foo'), but in IE you have to use the javascript property name instead, so div.setAttribute('className', 'foo').

Android Pop-up message

Suppose you want to set a pop-up text box for clicking a button lets say bt whose id is button, then code using Toast will somewhat look like this:

Button bt;
bt = (Button) findViewById(R.id.button);
bt.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {            
Toast.makeText(getApplicationContext(),"The text you want to display",Toast.LENGTH_LONG)
}

How to get the part of a file after the first line that matches a regular expression?

Use bash parameter expansion like the following:

content=$(cat file)
echo "${content#*TERMINATE}"

Export a graph to .eps file with R

Yes, open a postscript() device with a filename ending in .eps, do your plot(s) and call dev.off().

TypeError: 'builtin_function_or_method' object is not subscriptable

FYI, this is not an answer to the post. But it may help future users who may get the error with the message:

TypeError: 'builtin_function_or_method' object is not subscriptable

In my case, it was occurred due to bad indentation.

Just indenting the line of code solved the issue.

add maven repository to build.gradle

You will need to define the repository outside of buildscript. The buildscript configuration block only sets up the repositories and dependencies for the classpath of your build script but not your application.

How to sort dates from Oldest to Newest in Excel?

I figured it out!

Follow these steps:

Highlight the dates you want to filter
Switch from "date" format to "number" format. You'll get a weird number, but that's Ok.
That's when you sort from "smallest to largest"
Now switch it back to "date" format

You're welcome!

Change type of varchar field to integer: "cannot be cast automatically to type integer"

You can do it like:

change_column :table_name, :column_name, 'integer USING CAST(column_name AS integer)'

or try this:

change_column :table_name, :column_name, :integer, using: 'column_name::integer'

If you are interested to find more about this topic read this article: https://kolosek.com/rails-change-database-column

How to prevent Browser cache for php site

I had problem with caching my css files. Setting headers in PHP didn't help me (perhaps because the headers would need to be set in the stylesheet file instead of the page linking to it?).

I found the solution on this page: https://css-tricks.com/can-we-prevent-css-caching/

The solution:

Append timestamp as the query part of the URI for the linked file.
(Can be used for css, js, images etc.)

For development:

<link rel="stylesheet" href="style.css?<?php echo date('Y-m-d_H:i:s'); ?>">

For production (where caching is mostly a good thing):

<link rel="stylesheet" type="text/css" href="style.css?version=3.2">
(and rewrite manually when it is required)

Or combination of these two:

<?php
    define( "DEBUGGING", true ); // or false in production enviroment
?>
<!-- ... -->
<link rel="stylesheet" type="text/css" href="style.css?version=3.2<?php echo (DEBUGGING) ? date('_Y-m-d_H:i:s') : ""; ?>">

EDIT:

Or prettier combination of those two:

<?php
    // Init
    define( "DEBUGGING", true ); // or false in production enviroment
    // Functions
    function get_cache_prevent_string( $always = false ) {
        return (DEBUGGING || $always) ? date('_Y-m-d_H:i:s') : "";
    }
?>
<!-- ... -->
<link rel="stylesheet" type="text/css" href="style.css?version=3.2<?php echo get_cache_prevent_string(); ?>">

Convert HH:MM:SS string to seconds only in javascript

This function handels "HH:MM:SS" as well as "MM:SS" or "SS".

function hmsToSecondsOnly(str) {
    var p = str.split(':'),
        s = 0, m = 1;

    while (p.length > 0) {
        s += m * parseInt(p.pop(), 10);
        m *= 60;
    }

    return s;
}

Difference between & and && in Java?

& is bitwise AND operator comparing bits of each operand.
For example,

int a = 4;
int b = 7;
System.out.println(a & b); // prints 4
//meaning in an 32 bit system
// 00000000 00000000 00000000 00000100
// 00000000 00000000 00000000 00000111
// ===================================
// 00000000 00000000 00000000 00000100

&& is logical AND operator comparing boolean values of operands only. It takes two operands indicating a boolean value and makes a lazy evaluation on them.

Why is it important to override GetHashCode when Equals method is overridden?

By overriding Equals you're basically stating that you are the one who knows better how to compare two instances of a given type, so you're likely to be the best candidate to provide the best hash code.

This is an example of how ReSharper writes a GetHashCode() function for you:

public override int GetHashCode()
{
    unchecked
    {
        var result = 0;
        result = (result * 397) ^ m_someVar1;
        result = (result * 397) ^ m_someVar2;
        result = (result * 397) ^ m_someVar3;
        result = (result * 397) ^ m_someVar4;
        return result;
    }
}

As you can see it just tries to guess a good hash code based on all the fields in the class, but since you know your object's domain or value ranges you could still provide a better one.

Struct like objects in Java

To address mutability concerns you can declare x and y as final. For example:

class Data {
  public final int x;
  public final int y;
  public Data( int x, int y){
    this.x = x;
    this.y = y;
  }
}

Calling code that attempts to write to these fields will get a compile time error of "field x is declared final; cannot be assigned".

The client code can then have the 'short-hand' convenience you described in your post

public class DataTest {
    public DataTest() {
        Data data1 = new Data(1, 5);
        Data data2 = new Data(2, 4);
        System.out.println(f(data1));
        System.out.println(f(data2));
    }

    public int f(Data d) {
        return (3 * d.x) / d.y;
    }

    public static void main(String[] args) {
        DataTest dataTest = new DataTest();
    }
}

Kill python interpeter in linux from the terminal

pgrep -f youAppFile.py | xargs kill -9

pgrep returns the PID of the specific file will only kill the specific application.

Difference between two numpy arrays in python

This is pretty simple with numpy, just subtract the arrays:

diffs = array1 - array2

I get:

diffs == array([ 0.1,  0.2,  0.3])

The located assembly's manifest definition does not match the assembly reference

For us, the problem was caused by something else. The license file for the DevExpress components included two lines, one for an old version of the components that was not installed on this particular computer. Removing the older version from the license file solved the issue.

The annoying part is that the error message gave no indication to what reference was causing the problems.

How to cast or convert an unsigned int to int in C?

It depends on what you want the behaviour to be. An int cannot hold many of the values that an unsigned int can.

You can cast as usual:

int signedInt = (int) myUnsigned;

but this will cause problems if the unsigned value is past the max int can hold. This means half of the possible unsigned values will result in erroneous behaviour unless you specifically watch out for it.

You should probably reexamine how you store values in the first place if you're having to convert for no good reason.

EDIT: As mentioned by ProdigySim in the comments, the maximum value is platform dependent. But you can access it with INT_MAX and UINT_MAX.

For the usual 4-byte types:

4 bytes = (4*8) bits = 32 bits

If all 32 bits are used, as in unsigned, the maximum value will be 2^32 - 1, or 4,294,967,295.

A signed int effectively sacrifices one bit for the sign, so the maximum value will be 2^31 - 1, or 2,147,483,647. Note that this is half of the other value.

Replace string in text file using PHP

Thanks to your comments. I've made a function that give an error message when it happens:

/**
 * Replaces a string in a file
 *
 * @param string $FilePath
 * @param string $OldText text to be replaced
 * @param string $NewText new text
 * @return array $Result status (success | error) & message (file exist, file permissions)
 */
function replace_in_file($FilePath, $OldText, $NewText)
{
    $Result = array('status' => 'error', 'message' => '');
    if(file_exists($FilePath)===TRUE)
    {
        if(is_writeable($FilePath))
        {
            try
            {
                $FileContent = file_get_contents($FilePath);
                $FileContent = str_replace($OldText, $NewText, $FileContent);
                if(file_put_contents($FilePath, $FileContent) > 0)
                {
                    $Result["status"] = 'success';
                }
                else
                {
                   $Result["message"] = 'Error while writing file';
                }
            }
            catch(Exception $e)
            {
                $Result["message"] = 'Error : '.$e;
            }
        }
        else
        {
            $Result["message"] = 'File '.$FilePath.' is not writable !';
        }
    }
    else
    {
        $Result["message"] = 'File '.$FilePath.' does not exist !';
    }
    return $Result;
}

How do I make a dictionary with multiple keys to one value?

Your example creates multiple key: value pairs if using fromkeys. If you don't want this, you can use one key and create an alias for the key. For example if you are using a register map, your key can be the register address and the alias can be register name. That way you can perform read/write operations on the correct register.

>>> mydict = {}
>>> mydict[(1,2)] = [30, 20]
>>> alias1 = (1,2)
>>> print mydict[alias1]
[30, 20]
>>> mydict[(1,3)] = [30, 30]
>>> print mydict
{(1, 2): [30, 20], (1, 3): [30, 30]}
>>> alias1 in mydict
True

Switch statement: must default be the last case?

It's valid and very useful in some cases.

Consider the following code:

switch(poll(fds, 1, 1000000)){
   default:
    // here goes the normal case : some events occured
   break;
   case 0:
    // here goes the timeout case
   break;
   case -1:
     // some error occurred, you have to check errno
}

The point is that the above code is more readable and efficient than cascaded if. You could put default at the end, but it is pointless as it will focus your attention on error cases instead of normal cases (which here is the default case).

Actually, it's not such a good example, in poll you know how many events may occur at most. My real point is that there are cases with a defined set of input values where there are 'exceptions' and normal cases. If it's better to put exceptions or normal cases at front is a matter of choice.

In software field I think of another very usual case: recursions with some terminal values. If you can express it using a switch, default will be the usual value that contains recursive call and distinguished elements (individual cases) the terminal values. There is usually no need to focus on terminal values.

Another reason is that the order of the cases may change the compiled code behavior, and that matters for performances. Most compilers will generate compiled assembly code in the same order as the code appears in the switch. That makes the first case very different from the others: all cases except the first one will involve a jump and that will empty processor pipelines. You may understand it like branch predictor defaulting to running the first appearing case in the switch. If a case if much more common that the others then you have very good reasons to put it as the first case.

Reading comments it's the specific reason why the original poster asked that question after reading Intel compiler Branch Loop reorganisation about code optimisation.

Then it will become some arbitration between code readability and code performance. Probably better to put a comment to explain to future reader why a case appears first.

Copy folder recursively, excluding some folders

EXCLUDE="foo bar blah jah"                                                                             
DEST=$1

for i in *
do
    for x in $EXCLUDE
    do  
        if [ $x != $i ]; then
            cp -a $i $DEST
        fi  
    done
done

Untested...

Qt c++ aggregate 'std::stringstream ss' has incomplete type and cannot be defined

Like it's written up there, you forget to type #include <sstream>

#include <sstream>
using namespace std;

QString Stats_Manager::convertInt(int num)
{
   stringstream ss;
   ss << num;
   return ss.str();
}

You can also use some other ways to convert int to string, like

char numstr[21]; // enough to hold all numbers up to 64-bits
sprintf(numstr, "%d", age);
result = name + numstr;

check this!

How do you specify the Java compiler version in a pom.xml file?

<project>
  [...]
  <build>
    [...]
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>(whatever version is current)</version>
        <configuration>
          <!-- or whatever version you use -->
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
    </plugins>
    [...]
  </build>
  [...]
</project>

See the config page for the maven compiler plugin:

http://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

Oh, and: don't use Java 1.3.x, current versions are Java 1.7.x or 1.8.x

How can I get the iOS 7 default blue color programmatically?

According to the documentation for UIButton:

In iOS v7.0, all subclasses of UIView derive their behavior for tintColor from the base class. See the discussion of tintColor at the UIView level for more information.

Assuming you don't change the tintColor before grabbing the default value, you can use:

self.view.tintColor

Git: how to reverse-merge a commit?

To create a new commit that 'undoes' the changes of a past commit, use:

$ git revert <commit-hash>

It's also possible to actually remove a commit from an arbitrary point in the past by rebasing and then resetting, but you really don't want to do that if you have already pushed your commits to another repository (or someone else has pulled from you).

If your previous commit is a merge commit you can run this command

$ git revert -m 1 <commit-hash>

See schacon.github.com/git/howto/revert-a-faulty-merge.txt for proper ways to re-merge an un-merged branch

C++, How to determine if a Windows Process is running?

I found this today, it is from 2003. It finds a process by name, you don't even need the pid.

\#include windows.h

\#include tlhelp32.h

\#include iostream.h

int FIND_PROC_BY_NAME(const char *);

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

{

//  Check whether a process is currently running, or not

char szName[100]="notepad.exe";   // Name of process to find

int isRunning;

    isRunning=FIND_PROC_BY_NAME(szName);

    // Note: isRunning=0 means process not found, =1 means yes, it is found in memor
    return isRunning;
}

int FIND_PROC_BY_NAME(const char *szToFind)

// Created: 12/29/2000  (RK)

// Last modified: 6/16/2003  (RK)

// Please report any problems or bugs to [email protected]

// The latest version of this routine can be found at:

//     http://www.neurophys.wisc.edu/ravi/software/killproc/

// Check whether the process "szToFind" is currently running in memory

// This works for Win/95/98/ME and also Win/NT/2000/XP

// The process name is case-insensitive, i.e. "notepad.exe" and "NOTEPAD.EXE"

// will both work (for szToFind)

// Return codes are as follows:

//   0   = Process was not found

//   1   = Process was found

//   605 = Unable to search for process

//   606 = Unable to identify system type

//   607 = Unsupported OS

//   632 = Process name is invalid

// Change history:

//  3/10/2002   - Fixed memory leak in some cases (hSnapShot and

//                and hSnapShotm were not being closed sometimes)

//  6/13/2003   - Removed iFound (was not being used, as pointed out

//                by John Emmas)

{

    BOOL bResult,bResultm;
    DWORD aiPID[1000],iCb=1000,iNumProc,iV2000=0;
    DWORD iCbneeded,i;
    char szName[MAX_PATH],szToFindUpper[MAX_PATH];
    HANDLE hProc,hSnapShot,hSnapShotm;
    OSVERSIONINFO osvi;
    HINSTANCE hInstLib;
    int iLen,iLenP,indx;
    HMODULE hMod;
    PROCESSENTRY32 procentry;      
    MODULEENTRY32 modentry;

    // PSAPI Function Pointers.
     BOOL (WINAPI *lpfEnumProcesses)( DWORD *, DWORD cb, DWORD * );
     BOOL (WINAPI *lpfEnumProcessModules)( HANDLE, HMODULE *,
        DWORD, LPDWORD );
     DWORD (WINAPI *lpfGetModuleBaseName)( HANDLE, HMODULE,
        LPTSTR, DWORD );

      // ToolHelp Function Pointers.
      HANDLE (WINAPI *lpfCreateToolhelp32Snapshot)(DWORD,DWORD) ;
      BOOL (WINAPI *lpfProcess32First)(HANDLE,LPPROCESSENTRY32) ;
      BOOL (WINAPI *lpfProcess32Next)(HANDLE,LPPROCESSENTRY32) ;
      BOOL (WINAPI *lpfModule32First)(HANDLE,LPMODULEENTRY32) ;
      BOOL (WINAPI *lpfModule32Next)(HANDLE,LPMODULEENTRY32) ;

    // Transfer Process name into "szToFindUpper" and
    // convert it to upper case
    iLenP=strlen(szToFind);
    if(iLenP<1 || iLenP>MAX_PATH) return 632;
    for(indx=0;indx<iLenP;indx++)
        szToFindUpper[indx]=toupper(szToFind[indx]);
    szToFindUpper[iLenP]=0;

    // First check what version of Windows we're in
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    bResult=GetVersionEx(&osvi);
    if(!bResult)     // Unable to identify system version
        return 606;

    // At Present we only support Win/NT/2000 or Win/9x/ME
    if((osvi.dwPlatformId != VER_PLATFORM_WIN32_NT) &&
        (osvi.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS))
        return 607;

    if(osvi.dwPlatformId==VER_PLATFORM_WIN32_NT)
    {
        // Win/NT or 2000 or XP

         // Load library and get the procedures explicitly. We do
         // this so that we don't have to worry about modules using
         // this code failing to load under Windows 95, because
         // it can't resolve references to the PSAPI.DLL.
         hInstLib = LoadLibraryA("PSAPI.DLL");
         if(hInstLib == NULL)
            return 605;

         // Get procedure addresses.
         lpfEnumProcesses = (BOOL(WINAPI *)(DWORD *,DWORD,DWORD*))
            GetProcAddress( hInstLib, "EnumProcesses" ) ;
         lpfEnumProcessModules = (BOOL(WINAPI *)(HANDLE, HMODULE *,
            DWORD, LPDWORD)) GetProcAddress( hInstLib,
            "EnumProcessModules" ) ;
         lpfGetModuleBaseName =(DWORD (WINAPI *)(HANDLE, HMODULE,
            LPTSTR, DWORD )) GetProcAddress( hInstLib,
            "GetModuleBaseNameA" ) ;

         if( lpfEnumProcesses == NULL ||
            lpfEnumProcessModules == NULL ||
            lpfGetModuleBaseName == NULL)
            {
               FreeLibrary(hInstLib);
               return 605;
            }

        bResult=lpfEnumProcesses(aiPID,iCb,&iCbneeded);
        if(!bResult)
        {
            // Unable to get process list, EnumProcesses failed
            FreeLibrary(hInstLib);
            return 605;
        }

        // How many processes are there?
        iNumProc=iCbneeded/sizeof(DWORD);

        // Get and match the name of each process
        for(i=0;i<iNumProc;i++)
        {
            // Get the (module) name for this process

            strcpy(szName,"Unknown");
            // First, get a handle to the process
            hProc=OpenProcess(PROCESS_QUERY_INFORMATION|PROCESS_VM_READ,FALSE,
                aiPID[i]);
            // Now, get the process name
            if(hProc)
            {
               if(lpfEnumProcessModules(hProc,&hMod,sizeof(hMod),&iCbneeded) )
               {
                  iLen=lpfGetModuleBaseName(hProc,hMod,szName,MAX_PATH);
               }
            }
            CloseHandle(hProc);
            // Match regardless of lower or upper case
            if(strcmp(_strupr(szName),szToFindUpper)==0)
            {
                // Process found
                FreeLibrary(hInstLib);
                return 1;
            }
        }
    }

    if(osvi.dwPlatformId==VER_PLATFORM_WIN32_WINDOWS)
    {
        // Win/95 or 98 or ME

        hInstLib = LoadLibraryA("Kernel32.DLL");
        if( hInstLib == NULL )
            return FALSE ;

        // Get procedure addresses.
        // We are linking to these functions of Kernel32
        // explicitly, because otherwise a module using
        // this code would fail to load under Windows NT,
        // which does not have the Toolhelp32
        // functions in the Kernel 32.
        lpfCreateToolhelp32Snapshot=
            (HANDLE(WINAPI *)(DWORD,DWORD))
            GetProcAddress( hInstLib,
            "CreateToolhelp32Snapshot" ) ;
        lpfProcess32First=
            (BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
            GetProcAddress( hInstLib, "Process32First" ) ;
        lpfProcess32Next=
            (BOOL(WINAPI *)(HANDLE,LPPROCESSENTRY32))
            GetProcAddress( hInstLib, "Process32Next" ) ;
        lpfModule32First=
            (BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32))
            GetProcAddress( hInstLib, "Module32First" ) ;
        lpfModule32Next=
            (BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32))
            GetProcAddress( hInstLib, "Module32Next" ) ;
        if( lpfProcess32Next == NULL ||
            lpfProcess32First == NULL ||
            lpfModule32Next == NULL ||
            lpfModule32First == NULL ||
            lpfCreateToolhelp32Snapshot == NULL )
        {
            FreeLibrary(hInstLib);
            return 605;
        }

        // The Process32.. and Module32.. routines return names in all uppercase

        // Get a handle to a Toolhelp snapshot of all the systems processes.

        hSnapShot = lpfCreateToolhelp32Snapshot(
            TH32CS_SNAPPROCESS, 0 ) ;
        if( hSnapShot == INVALID_HANDLE_VALUE )
        {
            FreeLibrary(hInstLib);
            return 605;
        }

        // Get the first process' information.
        procentry.dwSize = sizeof(PROCESSENTRY32);
        bResult=lpfProcess32First(hSnapShot,&procentry);

        // While there are processes, keep looping and checking.
        while(bResult)
        {
            // Get a handle to a Toolhelp snapshot of this process.
            hSnapShotm = lpfCreateToolhelp32Snapshot(
                TH32CS_SNAPMODULE, procentry.th32ProcessID) ;
            if( hSnapShotm == INVALID_HANDLE_VALUE )
            {
                CloseHandle(hSnapShot);
                FreeLibrary(hInstLib);
                return 605;
            }
            // Get the module list for this process
            modentry.dwSize=sizeof(MODULEENTRY32);
            bResultm=lpfModule32First(hSnapShotm,&modentry);

            // While there are modules, keep looping and checking
            while(bResultm)
            {
                if(strcmp(modentry.szModule,szToFindUpper)==0)
                {
                    // Process found
                    CloseHandle(hSnapShotm);
                    CloseHandle(hSnapShot);
                    FreeLibrary(hInstLib);
                    return 1;
                }
                else
                {  // Look for next modules for this process
                    modentry.dwSize=sizeof(MODULEENTRY32);
                    bResultm=lpfModule32Next(hSnapShotm,&modentry);
                }
            }

            //Keep looking
            CloseHandle(hSnapShotm);
            procentry.dwSize = sizeof(PROCESSENTRY32);
            bResult = lpfProcess32Next(hSnapShot,&procentry);
        }
        CloseHandle(hSnapShot);
    }
    FreeLibrary(hInstLib);
    return 0;

}

Linq to Entities - SQL "IN" clause

Real example:

var trackList = Model.TrackingHistory.GroupBy(x => x.ShipmentStatusId).Select(x => x.Last()).Reverse();
List<int> done_step1 = new List<int>() {2,3,4,5,6,7,8,9,10,11,14,18,21,22,23,24,25,26 };
bool isExists = trackList.Where(x => done_step1.Contains(x.ShipmentStatusId.Value)).FirstOrDefault() != null;

Android Debug Bridge (adb) device - no permissions

Close running adb, could be closing running android-studio.
list devices,

/usr/local/android-studio/sdk/platform-tools/adb devices

How to create a 100% screen width div inside a container in bootstrap?

The reason why your full-width-div doesn't stretch 100% to your screen it's because of its parent "container" which occupies only about 80% of the screen.

If you want to make it stretch 100% to the screen either you make the "full-width-div" position fixed or use the "container-fluid" class instead of "container".

see Bootstrap 3 docs: http://getbootstrap.com/css/#grid

Graphical HTTP client for windows

I like rest-client a lot for the purposes you described. It's a Java application to test REST-based web services.

How to resolve the "EVP_DecryptFInal_ex: bad decrypt" during file decryption

I think the Key and IV used for encryption using command line and decryption using your program are not same.

Please note that when you use the "-k" (different from "-K"), the input given is considered as a password from which the key is derived. Generally in this case, there is no need for the "-iv" option as both key and password will be derived from the input given with "-k" option.

It is not clear from your question, how you are ensuring that the Key and IV are same between encryption and decryption.

In my suggestion, better use "-K" and "-iv" option to explicitly specify the Key and IV during encryption and use the same for decryption. If you need to use "-k", then use the "-p" option to print the key and iv used for encryption and use the same in your decryption program.

More details can be obtained at https://www.openssl.org/docs/manmaster/apps/enc.html

How to add comments into a Xaml file in WPF?

Found a nice solution by Laurent Bugnion, it can look something like this:

<UserControl xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:comment="Tag to add comments"
             mc:Ignorable="d comment" d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <Button Width="100"
                comment:Width="example comment on Width, will be ignored......">
        </Button>
    </Grid>
</UserControl>

Here's the link: http://blog.galasoft.ch/posts/2010/02/quick-tip-commenting-out-properties-in-xaml/

A commenter on the link provided extra characters for the ignore prefix in lieu of highlighting:

mc:Ignorable=”ØignoreØ”

A connection was successfully established with the server, but then an error occurred during the pre-login handshake

Running the following command worked for me:

netsh Winsock reset

Seen at https://serverfault.com/a/487139/250527

Passing an integer by reference in Python

class PassByReference:
    def Change(self, var):
        self.a = var
        print(self.a)
s=PassByReference()
s.Change(5)

CSS3 transform: rotate; in IE9

I also had problems with transformations in IE9, I used -ms-transform: rotate(10deg) and it didn't work. Tried everything I could, but the problem was in browser mode, to make transformations work, you need to set compatibility mode to "Standard IE9".

.toLowerCase not working, replacement function?

Numbers inherit from the Number constructor which doesn't have the .toLowerCase method. You can look it up as a matter of fact:

"toLowerCase" in Number.prototype; // false

How to change Status Bar text color in iOS

You can do this from info.plist:

1) "View controller-based status bar appearance" set to "NO"

2) "Status bar style" set to "UIStatusBarStyleLightContent"

done

How to overcome TypeError: unhashable type: 'list'

    python 3.2

    with open("d://test.txt") as f:
              k=(((i.split("\n"))[0].rstrip()).split() for i in f.readlines())
              d={}
              for i,_,v in k:
                      d.setdefault(i,[]).append(v)

How can I view the source code for a function?

UseMethod("t") is telling you that t() is a (S3) generic function that has methods for different object classes.

The S3 method dispatch system

For S3 classes, you can use the methods function to list the methods for a particular generic function or class.

> methods(t)
[1] t.data.frame t.default    t.ts*       

   Non-visible functions are asterisked
> methods(class="ts")
 [1] aggregate.ts     as.data.frame.ts cbind.ts*        cycle.ts*       
 [5] diffinv.ts*      diff.ts          kernapply.ts*    lines.ts        
 [9] monthplot.ts*    na.omit.ts*      Ops.ts*          plot.ts         
[13] print.ts         time.ts*         [<-.ts*          [.ts*           
[17] t.ts*            window<-.ts*     window.ts*      

   Non-visible functions are asterisked

"Non-visible functions are asterisked" means the function is not exported from its package's namespace. You can still view its source code via the ::: function (i.e. stats:::t.ts), or by using getAnywhere(). getAnywhere() is useful because you don't have to know which package the function came from.

> getAnywhere(t.ts)
A single object matching ‘t.ts’ was found
It was found in the following places
  registered S3 method for t from namespace stats
  namespace:stats
with value

function (x) 
{
    cl <- oldClass(x)
    other <- !(cl %in% c("ts", "mts"))
    class(x) <- if (any(other)) 
        cl[other]
    attr(x, "tsp") <- NULL
    t(x)
}
<bytecode: 0x294e410>
<environment: namespace:stats>

The S4 method dispatch system

The S4 system is a newer method dispatch system and is an alternative to the S3 system. Here is an example of an S4 function:

> library(Matrix)
Loading required package: lattice
> chol2inv
standardGeneric for "chol2inv" defined from package "base"

function (x, ...) 
standardGeneric("chol2inv")
<bytecode: 0x000000000eafd790>
<environment: 0x000000000eb06f10>
Methods may be defined for arguments: x
Use  showMethods("chol2inv")  for currently available ones.

The output already offers a lot of information. standardGeneric is an indicator of an S4 function. The method to see defined S4 methods is offered helpfully:

> showMethods(chol2inv)
Function: chol2inv (package base)
x="ANY"
x="CHMfactor"
x="denseMatrix"
x="diagonalMatrix"
x="dtrMatrix"
x="sparseMatrix"

getMethod can be used to see the source code of one of the methods:

> getMethod("chol2inv", "diagonalMatrix")
Method Definition:

function (x, ...) 
{
    chk.s(...)
    tcrossprod(solve(x))
}
<bytecode: 0x000000000ea2cc70>
<environment: namespace:Matrix>

Signatures:
        x               
target  "diagonalMatrix"
defined "diagonalMatrix"

There are also methods with more complex signatures for each method, for example

require(raster)
showMethods(extract)
Function: extract (package raster)
x="Raster", y="data.frame"
x="Raster", y="Extent"
x="Raster", y="matrix"
x="Raster", y="SpatialLines"
x="Raster", y="SpatialPoints"
x="Raster", y="SpatialPolygons"
x="Raster", y="vector"

To see the source code for one of these methods the entire signature must be supplied, e.g.

getMethod("extract" , signature = c( x = "Raster" , y = "SpatialPolygons") )

It will not suffice to supply the partial signature

getMethod("extract",signature="SpatialPolygons")
#Error in getMethod("extract", signature = "SpatialPolygons") : 
#  No method found for function "extract" and signature SpatialPolygons

Functions that call unexported functions

In the case of ts.union, .cbindts and .makeNamesTs are unexported functions from the stats namespace. You can view the source code of unexported functions by using the ::: operator or getAnywhere.

> stats:::.makeNamesTs
function (...) 
{
    l <- as.list(substitute(list(...)))[-1L]
    nm <- names(l)
    fixup <- if (is.null(nm)) 
        seq_along(l)
    else nm == ""
    dep <- sapply(l[fixup], function(x) deparse(x)[1L])
    if (is.null(nm)) 
        return(dep)
    if (any(fixup)) 
        nm[fixup] <- dep
    nm
}
<bytecode: 0x38140d0>
<environment: namespace:stats>

Functions that call compiled code

Note that "compiled" does not refer to byte-compiled R code as created by the compiler package. The <bytecode: 0x294e410> line in the above output indicates that the function is byte-compiled, and you can still view the source from the R command line.

Functions that call .C, .Call, .Fortran, .External, .Internal, or .Primitive are calling entry points in compiled code, so you will have to look at sources of the compiled code if you want to fully understand the function. This GitHub mirror of the R source code is a decent place to start. The function pryr::show_c_source can be a useful tool as it will take you directly to a GitHub page for .Internal and .Primitive calls. Packages may use .C, .Call, .Fortran, and .External; but not .Internal or .Primitive, because these are used to call functions built into the R interpreter.

Calls to some of the above functions may use an object instead of a character string to reference the compiled function. In those cases, the object is of class "NativeSymbolInfo", "RegisteredNativeSymbol", or "NativeSymbol"; and printing the object yields useful information. For example, optim calls .External2(C_optimhess, res$par, fn1, gr1, con) (note that's C_optimhess, not "C_optimhess"). optim is in the stats package, so you can type stats:::C_optimhess to see information about the compiled function being called.

Compiled code in a package

If you want to view compiled code in a package, you will need to download/unpack the package source. The installed binaries are not sufficient. A package's source code is available from the same CRAN (or CRAN compatible) repository that the package was originally installed from. The download.packages() function can get the package source for you.

download.packages(pkgs = "Matrix", 
                  destdir = ".",
                  type = "source")

This will download the source version of the Matrix package and save the corresponding .tar.gz file in the current directory. Source code for compiled functions can be found in the src directory of the uncompressed and untared file. The uncompressing and untaring step can be done outside of R, or from within R using the untar() function. It is possible to combine the download and expansion step into a single call (note that only one package at a time can be downloaded and unpacked in this way):

untar(download.packages(pkgs = "Matrix",
                        destdir = ".",
                        type = "source")[,2])

Alternatively, if the package development is hosted publicly (e.g. via GitHub, R-Forge, or RForge.net), you can probably browse the source code online.

Compiled code in a base package

Certain packages are considered "base" packages. These packages ship with R and their version is locked to the version of R. Examples include base, compiler, stats, and utils. As such, they are not available as separate downloadable packages on CRAN as described above. Rather, they are part of the R source tree in individual package directories under /src/library/. How to access the R source is described in the next section.

Compiled code built into the R interpreter

If you want to view the code built-in to the R interpreter, you will need to download/unpack the R sources; or you can view the sources online via the R Subversion repository or Winston Chang's github mirror.

Uwe Ligges's R news article (PDF) (p. 43) is a good general reference of how to view the source code for .Internal and .Primitive functions. The basic steps are to first look for the function name in src/main/names.c and then search for the "C-entry" name in the files in src/main/*.

batch file Copy files with certain extensions from multiple directories into one directory

Things like these are why I switched to Powershell. Try it out, it's fun:

Get-ChildItem -Recurse -Include *.doc | % {
    Copy-Item $_.FullName -destination x:\destination
}

MySQL: How to set the Primary Key on phpMyAdmin?

MySQL can index the first x characters of a column,but a TEXT type is of variable length so mysql cant assure the uniqueness of the column.If you still want text column,use VARCHAR.

XPath to get all child nodes (elements, comments, and text) without parent

From the documentation of XPath ( http://www.w3.org/TR/xpath/#location-paths ):

child::* selects all element children of the context node

child::text() selects all text node children of the context node

child::node() selects all the children of the context node, whatever their node type

So I guess your answer is:

$doc/PRESENTEDIN/X/child::node()

And if you want a flatten array of all nested nodes:

$doc/PRESENTEDIN/X/descendant::node()

How can I change from SQL Server Windows mode to mixed mode (SQL Server 2008)?

I had no success with other attempts on a SQL Server 2012. What I did was use SQL Server Management Studio to generate a script to change the value, and got this:

USE [master]
GO
EXEC xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'LoginMode', REG_DWORD, 2
GO

After that, I enabled the sa account using this:

ALTER LOGIN sa ENABLE ;
GO
ALTER LOGIN sa WITH PASSWORD = '<strongPasswordHere>' ;
GO

...then, I restarted the service, and everything worked!

How to mock static methods in c# using MOQ framework?

Moq (and other DynamicProxy-based mocking frameworks) are unable to mock anything that is not a virtual or abstract method.

Sealed/static classes/methods can only be faked with Profiler API based tools, like Typemock (commercial) or Microsoft Moles (free, known as Fakes in Visual Studio 2012 Ultimate /2013 /2015).

Alternatively, you could refactor your design to abstract calls to static methods, and provide this abstraction to your class via dependency injection. Then you'd not only have a better design, it will be testable with free tools, like Moq.

A common pattern to allow testability can be applied without using any tools altogether. Consider the following method:

public class MyClass
{
    public string[] GetMyData(string fileName)
    {
        string[] data = FileUtil.ReadDataFromFile(fileName);
        return data;
    }
}

Instead of trying to mock FileUtil.ReadDataFromFile, you could wrap it in a protected virtual method, like this:

public class MyClass
{
    public string[] GetMyData(string fileName)
    {
        string[] data = GetDataFromFile(fileName);
        return data;
    }

    protected virtual string[] GetDataFromFile(string fileName)
    {
        return FileUtil.ReadDataFromFile(fileName);
    }
}

Then, in your unit test, derive from MyClass and call it TestableMyClass. Then you can override the GetDataFromFile method to return your own test data.

Hope that helps.

GCM with PHP (Google Cloud Messaging)

<?php

function sendMessageToPhone($deviceToken, $collapseKey, $messageText, $yourKey) {    
    echo "DeviceToken:".$deviceToken."Key:".$collapseKey."Message:".$messageText
            ."API Key:".$yourKey."Response"."<br/>";

    $headers = array('Authorization:key=' . $yourKey);    
    $data = array(    
        'registration_id' => $deviceToken,          
        'collapse_key' => $collapseKey,
        'data.message' => $messageText);  
    $ch = curl_init();    

    curl_setopt($ch, CURLOPT_URL, "https://android.googleapis.com/gcm/send");    
    if ($headers)    
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);    
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);    
    curl_setopt($ch, CURLOPT_POST, true);    
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);    
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);    

    $response = curl_exec($ch);    
    var_dump($response);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);    
    if (curl_errno($ch)) {
        return false;
    }    
    if ($httpCode != 200) {
        return false;
    }    
    curl_close($ch);    
    return $response;    
}  

$yourKey = "YOURKEY";
$deviceToken = "REGISTERED_ID";
$collapseKey = "COLLAPSE_KEY";
$messageText = "MESSAGE";
echo sendMessageToPhone($deviceToken, $collapseKey, $messageText, $yourKey);
?>

In above script just change :

"YOURKEY" to API key to Server Key of API console.
"REGISTERED_ID" with your device's registration ID
"COLLAPSE_KEY" with key which you required
"MESSAGE" with message which you want to send

Let me know if you are getting any problem in this I am able to get notification successfully using the same script.

Replace NA with 0 in a data frame column

Since nobody so far felt fit to point out why what you're trying doesn't work:

NA == NA doesn't return TRUE, it returns NA (since comparing to undefined values should yield an undefined result).
You're trying to call apply on an atomic vector. You can't use apply to loop over the elements in a column.
Your subscripts are off - you're trying to give two indices into a$x, which is just the column (an atomic vector).

I'd fix up 3. to get to a$x[is.na(a$x)] <- 0

Adding timestamp to a filename with mv in BASH

The few lines you posted from your script look okay to me. It's probably something a bit deeper.

You need to find which line is giving you this error. Add set -xv to the top of your script. This will print out the line number and the command that's being executed to STDERR. This will help you identify where in your script you're getting this particular error.

BTW, do you have a shebang at the top of your script? When I see something like this, I normally expect its an issue with the Shebang. For example, if you had #! /bin/bash on top, but your bash interpreter is located in /usr/bin/bash, you'll see this error.

EDIT

New question: How can I save the file correctly in the first place, to avoid having to perform this fix every time I resend the file?

Two ways:

Select the Edit->EOL Conversion->Unix Format menu item when you edit a file. Once it has the correct line endings, Notepad++ will keep them.
To make sure all new files have the correct line endings, go to the Settings->Preferences menu item, and pull up the Preferences dialog box. Select the New Document/Default Directory tab. Under New Document and Format, select the Unix radio button. Click the Close button.

Create a user with all privileges in Oracle

There are 2 differences:

2 methods creating a user and granting some privileges to him

create user userName identified by password;
grant connect to userName;

and

grant connect to userName identified by password;

do exactly the same. It creates a user and grants him the connect role.

different outcome

resource is a role in oracle, which gives you the right to create objects (tables, procedures, some more but no views!). ALL PRIVILEGES grants a lot more of system privileges.

To grant a user all privileges run you first snippet or

grant all privileges to userName identified by password;

PHP mysql insert date format

You should consider creating a timestamp from that date witk mktime()

eg:

$date = explode('/', $_POST['date']);
$time = mktime(0,0,0,$date[0],$date[1],$date[2]);
$mysqldate = date( 'Y-m-d H:i:s', $time );

Bootstrap Navbar toggle button not working

because u have to have jquery set-up to enable the toggling functionality of the toggler button. So, all u have to do is to add bootstrap.bundle.js before bootstrap.css:

<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ho+j7jyWK8fNQe+A12Hb8AhRq26LrZ/JpcUGGOn+Y7RsweNrtN/tE3MoK7ZeZDyx" crossorigin="anonymous"></script>

ORACLE and TRIGGERS (inserted, updated, deleted)

I've changed my code like this and it works:

CREATE or REPLACE TRIGGER test001
  AFTER INSERT OR UPDATE OR DELETE ON tabletest001
  REFERENCING OLD AS old_buffer NEW AS new_buffer 
  FOR EACH ROW WHEN (new_buffer.field1 = 'HBP00' OR old_buffer.field1 = 'HBP00') 

DECLARE
      Operation       NUMBER;
      CustomerCode    CHAR(10 BYTE);
BEGIN

IF DELETING THEN 
  Operation := 3;
  CustomerCode := :old_buffer.field1;
END IF;

IF INSERTING THEN 
  Operation := 1;
  CustomerCode := :new_buffer.field1;
END IF;

IF UPDATING THEN 
  Operation := 2;
  CustomerCode := :new_buffer.field1;
END IF;    

// DO SOMETHING ...

EXCEPTION
    WHEN OTHERS THEN ErrorCode := SQLCODE;

END;

Setting the default value of a DateTime Property to DateTime.Now inside the System.ComponentModel Default Value Attrbute

using System.ComponentModel.DataAnnotations.Schema;

[DatabaseGenerated(DatabaseGeneratedOption.Computed)]
public DateTime CreatedOn { get; private set; }

printf format specifiers for uint32_t and size_t

Sounds like you're expecting size_t to be the same as unsigned long (possibly 64 bits) when it's actually an unsigned int (32 bits). Try using %zu in both cases.

I'm not entirely certain though.

Making LaTeX tables smaller?

You could add \singlespacing near the beginning of your table. See the setspace instructions for more options.

MySQL Results as comma separated list

Now only I came across this situation and found some more interesting features around GROUP_CONCAT. I hope these details will make you feel interesting.

simple GROUP_CONCAT

SELECT GROUP_CONCAT(TaskName) 
FROM Tasks;

Result:

+------------------------------------------------------------------+
| GROUP_CONCAT(TaskName)                                           |
+------------------------------------------------------------------+
| Do garden,Feed cats,Paint roof,Take dog for walk,Relax,Feed cats |
+------------------------------------------------------------------+

GROUP_CONCAT with DISTINCT

SELECT GROUP_CONCAT(TaskName) 
FROM Tasks;

Result:

+------------------------------------------------------------------+
| GROUP_CONCAT(TaskName)                                           |
+------------------------------------------------------------------+
| Do garden,Feed cats,Paint roof,Take dog for walk,Relax,Feed cats |
+------------------------------------------------------------------+

GROUP_CONCAT with DISTINCT and ORDER BY

SELECT GROUP_CONCAT(DISTINCT TaskName ORDER BY TaskName DESC) 
FROM Tasks;

Result:

+--------------------------------------------------------+
| GROUP_CONCAT(DISTINCT TaskName ORDER BY TaskName DESC) |
+--------------------------------------------------------+
| Take dog for walk,Relax,Paint roof,Feed cats,Do garden |
+--------------------------------------------------------+

GROUP_CONCAT with DISTINCT and SEPARATOR

SELECT GROUP_CONCAT(DISTINCT TaskName SEPARATOR ' + ') 
FROM Tasks;

Result:

+----------------------------------------------------------------+
| GROUP_CONCAT(DISTINCT TaskName SEPARATOR ' + ')                |
+----------------------------------------------------------------+
| Do garden + Feed cats + Paint roof + Relax + Take dog for walk |
+----------------------------------------------------------------+

GROUP_CONCAT and Combining Columns

SELECT GROUP_CONCAT(TaskId, ') ', TaskName SEPARATOR ' ') 
FROM Tasks;

Result:

+------------------------------------------------------------------------------------+
| GROUP_CONCAT(TaskId, ') ', TaskName SEPARATOR ' ')                                 |
+------------------------------------------------------------------------------------+
| 1) Do garden 2) Feed cats 3) Paint roof 4) Take dog for walk 5) Relax 6) Feed cats |
+------------------------------------------------------------------------------------+

GROUP_CONCAT and Grouped Results Assume that the following are the results before using GROUP_CONCAT

+------------------------+--------------------------+
| ArtistName             | AlbumName                |
+------------------------+--------------------------+
| Iron Maiden            | Powerslave               |
| AC/DC                  | Powerage                 |
| Jim Reeves             | Singing Down the Lane    |
| Devin Townsend         | Ziltoid the Omniscient   |
| Devin Townsend         | Casualties of Cool       |
| Devin Townsend         | Epicloud                 |
| Iron Maiden            | Somewhere in Time        |
| Iron Maiden            | Piece of Mind            |
| Iron Maiden            | Killers                  |
| Iron Maiden            | No Prayer for the Dying  |
| The Script             | No Sound Without Silence |
| Buddy Rich             | Big Swing Face           |
| Michael Learns to Rock | Blue Night               |
| Michael Learns to Rock | Eternity                 |
| Michael Learns to Rock | Scandinavia              |
| Tom Jones              | Long Lost Suitcase       |
| Tom Jones              | Praise and Blame         |
| Tom Jones              | Along Came Jones         |
| Allan Holdsworth       | All Night Wrong          |
| Allan Holdsworth       | The Sixteen Men of Tain  |
+------------------------+--------------------------+

USE Music;
SELECT ar.ArtistName,
    GROUP_CONCAT(al.AlbumName)
FROM Artists ar
INNER JOIN Albums al
ON ar.ArtistId = al.ArtistId
GROUP BY ArtistName;

Result:

+------------------------+----------------------------------------------------------------------------+
| ArtistName             | GROUP_CONCAT(al.AlbumName)                                                 |
+------------------------+----------------------------------------------------------------------------+
| AC/DC                  | Powerage                                                                   |
| Allan Holdsworth       | All Night Wrong,The Sixteen Men of Tain                                    |
| Buddy Rich             | Big Swing Face                                                             |
| Devin Townsend         | Epicloud,Ziltoid the Omniscient,Casualties of Cool                         |
| Iron Maiden            | Somewhere in Time,Piece of Mind,Powerslave,Killers,No Prayer for the Dying |
| Jim Reeves             | Singing Down the Lane                                                      |
| Michael Learns to Rock | Eternity,Scandinavia,Blue Night                                            |
| The Script             | No Sound Without Silence                                                   |
| Tom Jones              | Long Lost Suitcase,Praise and Blame,Along Came Jones                       |
+------------------------+----------------------------------------------------------------------------+

How do you send a Firebase Notification to all devices via CURL?

Your can send notification to all devices using "/topics/all"

https://fcm.googleapis.com/fcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA

{
  "to": "/topics/all",
  "notification":{ "title":"Notification title", "body":"Notification body", "sound":"default", "click_action":"FCM_PLUGIN_ACTIVITY", "icon":"fcm_push_icon" },
  "data": {
    "message": "This is a Firebase Cloud Messaging Topic Message!",
   }
}

Is it possible to set a custom font for entire of application?

package com.theeasylearn.demo.designdemo;
import android.content.Context;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.TextView;

public class MyButton extends TextView {

    public MyButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    public MyButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public MyButton(Context context) {
        super(context);
        init();
    }

    private void init() {

            Typeface tf =
                    Typeface.createFromAsset(
                            getContext().getAssets(), "angelina.TTF");
            setTypeface(tf);

    }

}

Excel function to get first word from sentence in other cell

Generic solution extracting the first "n" words of refcell string into a new string of "x" number of characters

=LEFT(SUBSTITUTE(***refcell***&" "," ",REPT(" ",***x***),***n***),***x***)

Assuming A1 has text string to extract, the 1st word extracted to a 15 character result

=LEFT(SUBSTITUTE(A1&" "," ",REPT(" ",15),1),15)

This would result in "Toronto" being returned to a 15 character string. 1st 2 words extracted to a 30 character result

=LEFT(SUBSTITUTE(A1&" "," ",REPT(" ",30),2),30)

would result in "Toronto is" being returned to a 30 character string

How to use Javascript to read local text file and read line by line?

Using ES6 the javascript becomes a little cleaner

handleFiles(input) {

    const file = input.target.files[0];
    const reader = new FileReader();

    reader.onload = (event) => {
        const file = event.target.result;
        const allLines = file.split(/\r\n|\n/);
        // Reading line by line
        allLines.forEach((line) => {
            console.log(line);
        });
    };

    reader.onerror = (event) => {
        alert(event.target.error.name);
    };

    reader.readAsText(file);
}

Meaning of delta or epsilon argument of assertEquals for double values

I just want to mention the great AssertJ library. It's my go to assertion library for JUnit 4 and 5 and also solves this problem elegantly:

assertThat(actual).isCloseTo(expectedDouble, within(delta))

HTML.HiddenFor value set

For setting value in hidden field do in the following way:

@Html.HiddenFor(model => model.title, 
                new { id= "natureOfVisitField", Value = @Model.title})

It will work

How to find sum of several integers input by user using do/while, While statement or For statement

You should do:

#include<iostream>
using namespace std;
int main ()
{

    int sum = 0;
    int number;
    int numberitems;


    cout << "Enter number of items: \n";
    cin >> numberitems;

    for(int i=0;i<numberitems;i++)
    {
        cout << "Enter number <<i<<":" \n";
        cin >> number; sum+=number;
    }
    cout<<"sum is: "<< sum<<endl;
}

And with a while statement

#include <iostream>
using namespace std;
int main ()
{
    int sum = 0;
    int number;
    int numberitems;
    cin>>numberitems;

    cout << "Enter number: \n";

    while (count <=numberitems)
    {
        cin >> number;
        sum+=number;
    }
    cout << sum << endl;
}

How do you find what version of libstdc++ library is installed on your linux machine?

The mechanism I tend to use is a combination of readelf -V to dump the .gnu.version information from libstdc++, and then a lookup table that matches the largest GLIBCXX_ value extracted.

readelf -sV /usr/lib/libstdc++.so.6 | sed -n 's/.*@@GLIBCXX_//p' | sort -u -V | tail -1

if your version of sort is too old to have the -V option (which sorts by version number) then you can use:

tr '.' ' ' | sort -nu -t ' ' -k 1 -k 2 -k 3 -k 4 | tr ' ' '.'

instead of the sort -u -V, to sort by up to 4 version digits.

In general, matching the ABI version should be good enough.

If you're trying to track down the libstdc++.so.<VERSION>, though, you can use a little bash like:

file=/usr/lib/libstdc++.so.6
while [ -h $file ]; do file=$(ls -l $file | sed -n 's/.*-> //p'); done
echo ${file#*.so.}

so for my system this yielded 6.0.10.

If, however, you're trying to get a binary that was compiled on systemX to work on systemY, then these sorts of things will only get you so far. In those cases, carrying along a copy of the libstdc++.so that was used for the application, and then having a run script that does an:

export LD_LIBRARY_PATH=<directory of stashed libstdc++.so>
exec application.bin "$@"

generally works around the issue of the .so that is on the box being incompatible with the version from the application. For more extreme differences in environment, I tend to just add all the dependent libraries until the application works properly. This is the linux equivalent of working around what, for windows, would be considered dll hell.

How do I convert two lists into a dictionary?

If you need to transform keys or values before creating a dictionary then a generator expression could be used. Example:

>>> adict = dict((str(k), v) for k, v in zip(['a', 1, 'b'], [2, 'c', 3]))

Take a look Code Like a Pythonista: Idiomatic Python.

How to install JRE 1.7 on Mac OS X and use it with Eclipse?

Try editing your eclipse.ini file and add the following at the top

-vm
/Library/Java/JavaVirtualMachines/jdk1.7.0_09.jdk/Contents/Home

Of course the path may be slightly different, looks like I have an older version...

I'm not sure if it will add itself automatically. If not go into

Preferences --> Java --> Installed JREs

Click Add and follow the instructions there to add it

Disable back button in react navigation

Have you considered using this.props.navigation.replace( "HomeScreen" ) instead of this.props.navigation.navigate( "HomeScreen" ).

This way you are not adding anything to the stack. so HomeScreen won't wave anything to go back to if back button pressed in Android or screen swiped to the right in IOS.

More informations check the Documentation. And of course you can hide the back button by setting headerLeft: null in navigationOptions

Find the files that have been changed in last 24 hours

You can do that with

find . -mtime 0

From man find:

[The] time since each file was last modified is divided by 24 hours and any remainder is discarded. That means that to match -mtime 0, a file will have to have a modification in the past which is less than 24 hours ago.

How to set image to fit width of the page using jsPDF?

i faced same problem but i solve using this code

html2canvas(body,{
                onrendered:function(canvas){
                    var pdf=new jsPDF("p", "mm", "a4");
                    var width = pdf.internal.pageSize.getWidth();    
                    var height = pdf.internal.pageSize.getHeight();
                    pdf.addImage(canvas, 'JPEG', 0, 0,width,height);
                    pdf.save('test11.pdf');
                }
            })

asp.net validation to make sure textbox has integer values

There are several different ways you can handle this. You could add a RequiredFieldValidator as well as a RangeValidator (if that works for your case) or you could add a CustomFieldValidator.

Link to the CustomFieldValidator: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.customvalidator%28VS.71%29.aspx

Link to MSDN Article on ASP.NET Validation: http://msdn.microsoft.com/en-us/library/aa479045.aspx

Why is JsonRequestBehavior needed?

You do not need it.

If your action has the HttpPost attribute, then you do not need to bother with setting the JsonRequestBehavior and use the overload without it. There is an overload for each method without the JsonRequestBehavior enum. Here they are:

Without JsonRequestBehavior

protected internal JsonResult Json(object data);
protected internal JsonResult Json(object data, string contentType);
protected internal virtual JsonResult Json(object data, string contentType, Encoding contentEncoding);

With JsonRequestBehavior

protected internal JsonResult Json(object data, JsonRequestBehavior behavior);
protected internal JsonResult Json(object data, string contentType, 
                                   JsonRequestBehavior behavior);
protected internal virtual JsonResult Json(object data, string contentType, 
    Encoding contentEncoding, JsonRequestBehavior behavior);

How to play CSS3 transitions in a loop?

CSS transitions only animate from one set of styles to another; what you're looking for is CSS animations.

You need to define the animation keyframes and apply it to the element:

@keyframes changewidth {
  from {
    width: 100px;
  }

  to {
    width: 300px;
  }
}

div {
  animation-duration: 0.1s;
  animation-name: changewidth;
  animation-iteration-count: infinite;
  animation-direction: alternate;
}

Check out the link above to figure out how to customize it to your liking, and you'll have to add browser prefixes.

How to read a file line-by-line into a list?

Outline and Summary

With a filename, handling the file from a Path(filename) object, or directly with open(filename) as f, do one of the following:

list(fileinput.input(filename))
using with path.open() as f, call f.readlines()
list(f)
path.read_text().splitlines()
path.read_text().splitlines(keepends=True)
iterate over fileinput.input or f and list.append each line one at a time
pass f to a bound list.extend method
use f in a list comprehension

I explain the use-case for each below.

In Python, how do I read a file line-by-line?

This is an excellent question. First, let's create some sample data:

from pathlib import Path
Path('filename').write_text('foo\nbar\nbaz')

File objects are lazy iterators, so just iterate over it.

filename = 'filename'
with open(filename) as f:
    for line in f:
        line # do something with the line

Alternatively, if you have multiple files, use fileinput.input, another lazy iterator. With just one file:

import fileinput

for line in fileinput.input(filename): 
    line # process the line

or for multiple files, pass it a list of filenames:

for line in fileinput.input([filename]*2): 
    line # process the line

Again, f and fileinput.input above both are/return lazy iterators. You can only use an iterator one time, so to provide functional code while avoiding verbosity I'll use the slightly more terse fileinput.input(filename) where apropos from here.

In Python, how do I read a file line-by-line into a list?

Ah but you want it in a list for some reason? I'd avoid that if possible. But if you insist... just pass the result of fileinput.input(filename) to list:

list(fileinput.input(filename))

Another direct answer is to call f.readlines, which returns the contents of the file (up to an optional hint number of characters, so you could break this up into multiple lists that way).

You can get to this file object two ways. One way is to pass the filename to the open builtin:

filename = 'filename'

with open(filename) as f:
    f.readlines()

or using the new Path object from the pathlib module (which I have become quite fond of, and will use from here on):

from pathlib import Path

path = Path(filename)

with path.open() as f:
    f.readlines()

list will also consume the file iterator and return a list - a quite direct method as well:

with path.open() as f:
    list(f)

If you don't mind reading the entire text into memory as a single string before splitting it, you can do this as a one-liner with the Path object and the splitlines() string method. By default, splitlines removes the newlines:

path.read_text().splitlines()

If you want to keep the newlines, pass keepends=True:

path.read_text().splitlines(keepends=True)

I want to read the file line by line and append each line to the end of the list.

Now this is a bit silly to ask for, given that we've demonstrated the end result easily with several methods. But you might need to filter or operate on the lines as you make your list, so let's humor this request.

Using list.append would allow you to filter or operate on each line before you append it:

line_list = []
for line in fileinput.input(filename):
    line_list.append(line)

line_list

Using list.extend would be a bit more direct, and perhaps useful if you have a preexisting list:

line_list = []
line_list.extend(fileinput.input(filename))
line_list

Or more idiomatically, we could instead use a list comprehension, and map and filter inside it if desirable:

[line for line in fileinput.input(filename)]

Or even more directly, to close the circle, just pass it to list to create a new list directly without operating on the lines:

list(fileinput.input(filename))

Conclusion

You've seen many ways to get lines from a file into a list, but I'd recommend you avoid materializing large quantities of data into a list and instead use Python's lazy iteration to process the data if possible.

That is, prefer fileinput.input or with path.open() as f.

Programs & Examples On #3dsmax

Android WebView Cookie Problem

Java: Get first item from a collection

How to determine whether a Pandas Column contains a particular value

How can I pad an int with leading zeros when using cout << operator?

Pass form data to another page with php

Import error: No module name urllib2

Can Android do peer-to-peer ad-hoc networking?

Search for string within text column in MySQL

Connection reset by peer: mod_fcgid: error reading data from FastCGI server

Open Facebook Page in Facebook App (if installed) on Android

How to add Date Picker Bootstrap 3 on MVC 5 project using the Razor engine?

What is the difference between C and embedded C?

Convert string to date in bash

What is Hash and Range Primary Key?

How do I set up Visual Studio Code to compile C++ code?

Make Bootstrap Popover Appear/Disappear on Hover instead of Click

How to force a html5 form validation without submitting it via jQuery

How to position a div scrollbar on the left hand side?

Extract substring in Bash

Failed to install android-sdk: "java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema"

How to pass a type as a method parameter in Java

What are the differences between a superkey and a candidate key?

How to correct "TypeError: 'NoneType' object is not subscriptable" in recursive function?

Synchronous request in Node.js

Super Request

Compare DATETIME and DATE ignoring time portion

"installation of package 'FILE_PATH' had non-zero exit status" in R

How to detect current state within directive

Capture key press without placing an input element on the page?

For modern JS, use event.key!

iOS Swift - Get the Current Local Time and Date Timestamp

How to get multiple select box values using jQuery?

Definition of "downstream" and "upstream"

What is ":-!!" in C code?

How can I implement prepend and append with regular JavaScript?

How to multiply a BigDecimal by an integer in Java

Truncating long strings with CSS: feasible yet?

How can I add comments in MySQL?

Why is my Button text forced to ALL CAPS on Lollipop?

How to write to the Output window in Visual Studio?

Wrap long lines in Python

How to escape double quotes in a title attribute

List and kill at jobs on UNIX

NULL value for int in Update statement

How do I simply create a patch from my latest git commit?

SQLSTATE[42S22]: Column not found: 1054 Unknown column - Laravel

Modulo operation with negative numbers

How do I set response headers in Flask?

Difference between .dll and .exe?

What's the fastest way to do a bulk insert into Postgres?

What is the difference between JavaScript and jQuery?

What are the differences between the BLOB and TEXT datatypes in MySQL?

Increase max execution time for php

Angular2: Cannot read property 'name' of undefined

How to initialize a list of strings (List<string>) with many string values

Request exceeded the limit of 10 internal redirects due to probable configuration error

How to find the last field using 'cut'

python: NameError:global name '...‘ is not defined

mysql after insert trigger which updates another table's column

The following sections have been defined but have not been rendered for the layout page "~/Views/Shared/_Layout.cshtml": "Scripts"

How can I split and parse a string in Python?

how to fix stream_socket_enable_crypto(): SSL operation failed with code 1

How can I plot with 2 different y-axes?

Why do I get a "permission denied" error while installing a gem?

How to recover the deleted files using "rm -R" command in linux server?

VBA shorthand for x=x+1?

Prevent direct access to a php include file

Oracle insert from select into table with more columns

jQuery ui dialog change title after load-callback

jQuery.getJSON - Access-Control-Allow-Origin Issue

What is the error "Every derived table must have its own alias" in MySQL?

JavaScript alert not working in Android WebView

How to start Apache and MySQL automatically when Windows 8 comes up

fail to change placeholder color with Bootstrap 3

Using awk to print all columns from the nth to the last

Check table exist or not before create it in Oracle

How to re-create database for Entity Framework?

creating batch script to unzip a file without additional zip tools

Python - Get Yesterday's date as a string in YYYY-MM-DD format

For modern JS, use `event.key`!

Doing Multiple `$http.post` Requests Directly from a FileList

Working Demo of "select-ng-files" Directive that Works with `ng-model`¹