Converting rows into columns and columns into rows using R
Here is a tidyverse option that might work depending on the data, and some caveats on its usage:
library(tidyverse)
starting_df %>%
rownames_to_column() %>%
gather(variable, value, -rowname) %>%
spread(rowname, value)
rownames_to_column() is necessary if the original dataframe has meaningful row names, otherwise the new column names in the new transposed dataframe will be integers corresponding to the orignal row number. If there are no meaningful row names you can skip rownames_to_column() and replace rowname with the name of the first column in the dataframe, assuming those values are unique and meaningful. Using the tidyr::smiths sample data would be:
smiths %>%
gather(variable, value, -subject) %>%
spread(subject, value)
Using the example starting_df with the tidyverse approach will throw a warning message about dropping attributes. This is related to converting columns with different attribute types into a single character column. The smiths data will not give that warning because all columns except for subject are doubles.
The earlier answer using as.data.frame(t()) will convert everything to a factor
if there are mixed column types unless stringsAsFactors = FALSE is added,
whereas the tidyverse option converts everything to a character by default if
there are mixed column types.
Convert row names into first column
Alternatively, you can create a new dataframe (or overwrite the current one, as the example below) so you do not need to use of any external package. However this way may not be efficient with huge dataframes.
df <- data.frame(names = row.names(df), df)
What is the advantage of using heredoc in PHP?
Heredoc's are a great alternative to quoted strings because of increased readability and maintainability. You don't have to escape quotes and (good) IDEs or text editors will use the proper syntax highlighting.
A very common example: echoing out HTML from within PHP:
$html = <<<HTML
<div class='something'>
<ul class='mylist'>
<li>$something</li>
<li>$whatever</li>
<li>$testing123</li>
</ul>
</div>
HTML;
// Sometime later
echo $html;
It is easy to read and easy to maintain.
The alternative is echoing quoted strings, which end up containing escaped quotes and IDEs aren't going to highlight the syntax for that language, which leads to poor readability and more difficulty in maintenance.
Updated answer for Your Common Sense
Of course you wouldn't want to see an SQL query highlighted as HTML. To use other languages, simply change the language in the syntax:
$sql = <<<SQL
SELECT * FROM table
SQL;
How to get file path from OpenFileDialog and FolderBrowserDialog?
you can store the Path into string variable like
string s = choofdlog.FileName;
CORS Access-Control-Allow-Headers wildcard being ignored?
Quoted from monsur,
The Access-Control-Allow-Headers header does not allow wildcards. It must be an exact match: http://www.w3.org/TR/cors/#access-control-allow-headers-response-header.
So here is my php solution.
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
$headers=getallheaders();
@$ACRH=$headers["Access-Control-Request-Headers"];
header("Access-Control-Allow-Headers: $ACRH");
}
WPF: simple TextBox data binding
Your Window is not implementing the necessary data binding notifications that the grid requires to use it as a data source, namely the INotifyPropertyChanged interface.
Your "Name2" string needs also to be a property and not a public variable, as data binding is for use with properties.
Implementing the necessary interfaces for using an object as a data source can be found here.
Vertically centering a div inside another div
Another way is using Transform Translate
Outer Div must set its position to relative or fixed, and the Inner Div must set its position to absolute, top and left to 50% and apply a transform: translate(-50%, -50%).
div.cn {_x000D_
position: relative;_x000D_
width: 200px;_x000D_
height: 200px;_x000D_
background: gray;_x000D_
text-align: center;_x000D_
}_x000D_
_x000D_
div.inner {_x000D_
position: absolute;_x000D_
top: 50%;_x000D_
left: 50%;_x000D_
width: 100px;_x000D_
height: 100px;_x000D_
-webkit-transform: translate(-50%, -50%); _x000D_
transform: translate(-50%, -50%); _x000D_
background: red;_x000D_
_x000D_
}<div class="cn">_x000D_
<div class="inner">_x000D_
test_x000D_
</div>_x000D_
</div>Tested in:
- Opera 24.0 (minimum 12.1)
- Safari 5.1.7 (minimum 4 with -webkit- prefix)
- Firefox 31.0 (minimum 3.6 with -moz- prefix, from 16 without prefix)
- Chrome 36 (minimum 11 with -webkit- prefix, from 36 without prefix)
- IE 11, 10 (minimum 9 with -ms- prefix, from 10 without prefix)
- More browsers, Can I Use?
Fixed header table with horizontal scrollbar and vertical scrollbar on
If this is what you want only HTML and CSS solution
Here's the HTML
<div class="outer-container"> <!-- absolute positioned container -->
<div class="inner-container">
<div class="table-header">
<table id="headertable" width="100%" cellpadding="0" cellspacing="0">
<thead>
<tr>
<th class="header-cell col1">One</th>
<th class="header-cell col2">Two</th>
<th class="header-cell col3">Three</th>
<th class="header-cell col4">Four</th>
<th class="header-cell col5">Five</th>
</tr>
</thead>
</table>
</div>
<div class="table-body">
<table id="bodytable" width="100%" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
<tr>
<td class="body-cell col1">body row1</td>
<td class="body-cell col2">body row2</td>
<td class="body-cell col3">body row2</td>
<td class="body-cell col4">body row2</td>
<td class="body-cell col5">body row2 en nog meer</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
And this is the css
body {
margin:0;
padding:0;
height: 100%;
width: 100%;
}
table {
border-collapse: collapse; /* make simple 1px lines borders if border defined */
}
tr {
width: 100%;
}
.outer-container {
background-color: #ccc;
position: absolute;
top:0;
left: 0;
right: 300px;
bottom:40px;
overflow: scroll;
}
.inner-container {
width: 100%;
height: 100%;
position: relative;
overflow-x: visible;
overflow-y:visible;
}
.table-header {
float:left;
width: 100%;
}
.table-body {
float:left;
height: auto;
width: auto;
overflow: visible;
background-color: red;
}
.header-cell {
background-color: yellow;
text-align: left;
height: 40px;
}
.body-cell {
background-color: transparent;
text-align: left;
}
.col1, .col3, .col4, .col5 {
width:120px;
min-width: 120px;
}
.col2 {
min-width: 300px;
}
Let me know if this is what you need. Or some thing is missing. I went through the other answers and found that jquery has been used . I took it on assumption that you need css solution . If I am missing any more point please mention :)
How to use Visual Studio Code as Default Editor for Git
git config --global core.editor "code --wait"
OR
git config --global core.editor "code -w"
Check
git config --global e
Your configuration will open in Visual Studio Code
JSLint is suddenly reporting: Use the function form of "use strict"
Add a file .jslintrc (or .jshintrc in the case of jshint) at the root of your project with the following content:
{
"node": true
}
Count how many files in directory PHP
Here's a PHP Linux function that's considerably fast. A bit dirty, but it gets the job done!
$dir - path to directory
$type - f, d or false (by default)
f - returns only files count
d - returns only folders count
false - returns total files and folders count
function folderfiles($dir, $type=false) {
$f = escapeshellarg($dir);
if($type == 'f') {
$io = popen ( '/usr/bin/find ' . $f . ' -type f | wc -l', 'r' );
} elseif($type == 'd') {
$io = popen ( '/usr/bin/find ' . $f . ' -type d | wc -l', 'r' );
} else {
$io = popen ( '/usr/bin/find ' . $f . ' | wc -l', 'r' );
}
$size = fgets ( $io, 4096);
pclose ( $io );
return $size;
}
You can tweak to fit your needs.
Please note that this will not work on Windows.
Remove table row after clicking table row delete button
You can use jQuery click instead of using onclick attribute, Try the following:
$('table').on('click', 'input[type="button"]', function(e){
$(this).closest('tr').remove()
})
How to execute mongo commands through shell scripts?
How about this:
echo "db.mycollection.findOne()" | mongo myDbName
echo "show collections" | mongo myDbName
Creating instance list of different objects
List<Object> objects = new ArrayList<Object>();
objects list will accept any of the Object
You could design like as follows
public class BaseEmployee{/* stuffs */}
public class RegularEmployee extends BaseEmployee{/* stuffs */}
public class Contractors extends BaseEmployee{/* stuffs */}
and in list
List<? extends BaseEmployee> employeeList = new ArrayList<? extends BaseEmployee>();
How can I completely uninstall nodejs, npm and node in Ubuntu
It is better to remove NodeJS and its modules manually because installation leaves a lot of files, links and modules behind and later this creates problems when we reconfigure another version of NodeJS and its modules.
To remove the files, run the following commands:
sudo rm -rf /usr/local/bin/npm
sudo rm -rf /usr/local/share/man/man1/node*
sudo rm -rf /usr/local/lib/dtrace/node.d
rm -rf ~/.npm
rm -rf ~/.node-gyp
sudo rm -rf /opt/local/bin/node
sudo rm -rf /opt/local/include/node
sudo rm -rf /opt/local/lib/node_modules
sudo rm -rf /usr/local/lib/node*
sudo rm -rf /usr/local/include/node*
sudo rm -rf /usr/local/bin/node*
I have posted a step by step guide with commands on my blog: AMCOS IT Support For Windows and Linux: To completely uninstall node js from Ubuntu.
Selenium WebDriver.get(url) does not open the URL
If your are using it in windows machine, check whether the selenium webdriver you have installed is of the latest one. I just now explored that my webdriver is of old one and it just opens the firefox but it couldn't process the get function.
Updation of the webdriver resolves this problem
Write string to text file and ensure it always overwrites the existing content.
If your code doesn't require the file to be truncated first, you can use the FileMode.OpenOrCreate to open the filestream, which will create the file if it doesn't exist or open it if it does. You can use the stream to point at the front and start overwriting the existing file?
I'm assuming your using a streams here, there are other ways to write a file.
Converting int to bytes in Python 3
From bytes docs:
Accordingly, constructor arguments are interpreted as for bytearray().
Then, from bytearray docs:
The optional source parameter can be used to initialize the array in a few different ways:
- If it is an integer, the array will have that size and will be initialized with null bytes.
Note, that differs from 2.x (where x >= 6) behavior, where bytes is simply str:
>>> bytes is str
True
The 2.6 str differs from 3.0’s bytes type in various ways; most notably, the constructor is completely different.
Selecting only numeric columns from a data frame
iris %>% dplyr::select(where(is.numeric)) #as per most recent updates
Another option with purrr would be to negate discard function:
iris %>% purrr::discard(~!is.numeric(.))
If you want the names of the numeric columns, you can add names or colnames:
iris %>% purrr::discard(~!is.numeric(.)) %>% names
Max parallel http connections in a browser?
Note that increasing a browser's max connections per server to an excessive number (as some sites suggest) can and does lock other users out of small sites with hosting plans that limit the total simultaneous connections on the server.
Multiple axis line chart in excel
It is possible to get both the primary and secondary axes on one side of the chart by designating the secondary axis for one of the series.
To get the primary axis on the right side with the secondary axis, you need to set to "High" the Axis Labels option in the Format Axis dialog box for the primary axis.
To get the secondary axis on the left side with the primary axis, you need to set to "Low" the Axis Labels option in the Format Axis dialog box for the secondary axis.
I know of no way to get a third set of axis labels on a single chart. You could fake in axis labels & ticks with text boxes and lines, but it would be hard to get everything aligned correctly.
The more feasible route is that suggested by zx8754: Create a second chart, turning off titles, left axes, etc. and lay it over the first chart. See my very crude mockup which hasn't been fine-tuned yet.
How to suppress binary file matching results in grep
There are three options, that you can use. -I is to exclude binary files in grep. Other are for line numbers and file names.
grep -I -n -H
-I -- process a binary file as if it did not contain matching data;
-n -- prefix each line of output with the 1-based line number within its input file
-H -- print the file name for each match
So this might be a way to run grep:
grep -InH your-word *
Best way to use multiple SSH private keys on one client
Generate an SSH key:
$ ssh-keygen -t rsa -C <[email protected]>Generate another SSH key:
$ ssh-keygen -t rsa -f ~/.ssh/accountB -C <[email protected]>Now, two public keys (id_rsa.pub, accountB.pub) should be exists in the
~/.ssh/directory.$ ls -l ~/.ssh # see the files of '~/.ssh/' directoryCreate configuration file
~/.ssh/configwith the following contents:$ nano ~/.ssh/config Host bitbucket.org User git Hostname bitbucket.org PreferredAuthentications publickey IdentityFile ~/.ssh/id_rsa Host bitbucket-accountB User git Hostname bitbucket.org PreferredAuthentications publickey IdentitiesOnly yes IdentityFile ~/.ssh/accountBClone from
defaultaccount.$ git clone [email protected]:username/project.gitClone from the
accountBaccount.$ git clone git@bitbucket-accountB:username/project.git
Are all Spring Framework Java Configuration injection examples buggy?
In your test, you are comparing the two TestParent beans, not the single TestedChild bean.
Also, Spring proxies your @Configuration class so that when you call one of the @Bean annotated methods, it caches the result and always returns the same object on future calls.
See here:
mkdir -p functionality in Python
With Pathlib from python3 standard library:
Path(mypath).mkdir(parents=True, exist_ok=True)
If parents is true, any missing parents of this path are created as needed; they are created with the default permissions without taking mode into account (mimicking the POSIX mkdir -p command). If exist_ok is false (the default), an FileExistsError is raised if the target directory already exists.
If exist_ok is true, FileExistsError exceptions will be ignored (same behavior as the POSIX mkdir -p command), but only if the last path component is not an existing non-directory file.
Changed in version 3.5: The exist_ok parameter was added.
Java: Get last element after split
I guess you want to do this in i line. It is possible (a bit of juggling though =^)
new StringBuilder(new StringBuilder("Düsseldorf - Zentrum - Günnewig Uebachs").reverse().toString().split(" - ")[0]).reverse()
tadaa, one line -> the result you want (if you split on " - " (space minus space) instead of only "-" (minus) you will loose the annoying space before the partition too =^) so "Günnewig Uebachs" instead of " Günnewig Uebachs" (with a space as first character)
Nice extra -> no need for extra JAR files in the lib folder so you can keep your application light weight.
Paused in debugger in chrome?
Its really a bad experience. if the above answer didn't work for you try this.
Click on the Settings icon and then click on the Restore defaults and reload button.
Press 'F8' until its became normal.
Happy coding!!
How do you define a class of constants in Java?
Or 4. Put them in the class that contains the logic that uses the constants the most
... sorry, couldn't resist ;-)
How to find a number in a string using JavaScript?
You can also try this :
var string = "border-radius:10px 20px 30px 40px";_x000D_
var numbers = string.match(/\d+/g).map(Number);_x000D_
console.log(numbers)How can I convert a string with dot and comma into a float in Python
If you have a comma as decimals separator and the dot as thousands separator, you can do:
s = s.replace('.','').replace(',','.')
number = float(s)
Hope it will help
How to get the azure account tenant Id?
For AAD-B2C it is fairly simple. From Azure Portal with a B2C directory associated, go to your B2C directory (I added the "Azure AD B2C" to my portal's left menu). In the B2C directory click on "User flows (policies) directory menu item. In the policies pane click on one of your policies you previously added to select it. It should open a pane for the policy. Click "Properties". In the next pane is a section, "Token compatibility settings" which has a property "Issuer". Your AAD-B2C tenant GUID is contained in the URL.
How to unbind a listener that is calling event.preventDefault() (using jQuery)?
You can set to form 2 classes. After you set your JS script to one of them, when you want to disable your script, you just delete the class with binded script from this form.
HTML:
<form class="form-create-container form-create"> </form>
JS
$(document).on('submit', '.form-create', function(){
..... ..... .....
$('.form-create-container').removeClass('form-create').submit();
});
Delete keychain items when an app is uninstalled
For users looking for a Swift 3.0 version of @amro's answer:
let userDefaults = UserDefaults.standard
if !userDefaults.bool(forKey: "hasRunBefore") {
// Remove Keychain items here
// Update the flag indicator
userDefaults.set(true, forKey: "hasRunBefore")
}
*note that synchronize() function is deprecated
How to set session timeout in web.config
If you are using MVC, you put this in the web.config file in the Root directory of the web application, not the web.config in the Views directory. It also needs to be IN the system.web node, not under like George2 stated in his question: "I wrote under system.web section in the web.config"
The timeout parameter value represents minutes.
There are other attributes that can be set in the sessionState element. You can find information here: docs.microsoft.com sessionState
<configuration>
<system.web>
<sessionState timeout="20"></sessionState>
</system.web>
</configuration>
You can then catch the begining of a new session in the Global.asax file by adding the following method:
void Session_Start(object sender, EventArgs e)
{
if (Session.IsNewSession)
{
//do things that need to happen
//when a new session starts.
}
}
Where is android_sdk_root? and how do I set it.?
I received the same error after installing android studio and trying to run hello world. I think you need to use the SDK Manager inside Android Studio to install some things first.
Open up Android Studio, and click on the SDK Manager in the toolbar.
Now install the SDK tools you need.
- Tools -> Android SDK Tools
- Tools -> Android SDK Platform-tools
- Tools -> Android SDK Build-tools (highest version)
For each Android release you are targeting, hit the appropriate Android X.X folder and select (at a minimum):
- SDK Platform
- A system image for the emulator, such as ARM EABI v7a System Image
The SDK Manager will run (this can take a while) and download and install the various SDKs.
Inside Android Studio, File->Project Structure will show you where your Android sdks are installed. As you can see mine is c:\users\Joe\AppData\Local\Android\sdk1.
If I navigate to C:\Users\Joe\AppData\Local\Android\sdk1\sources you can see the various Android SDKs installed there...
What is java pojo class, java bean, normal class?
POJO = Plain Old Java Object. It has properties, getters and setters for respective properties. It may also override Object.toString() and Object.equals().
Java Beans : See Wiki link.
Normal Class : Any java Class.
How to add white spaces in HTML paragraph
This can be done easily and cleanly with float.
Demo: jsfiddle.net/KcdpW
HTML:
<ul>
<li>Item 1 <span class="right">(1)</span></li>
<li>Item 2 <span class="right">(2)</span></li>
</ul>?
CSS:
ul {
width: 10em
}
.right {
float: right
}?
Update multiple rows using select statement
You can use alias to improve the query:
UPDATE t1
SET t1.Value = t2.Value
FROM table1 AS t1
INNER JOIN
table2 AS t2
ON t1.ID = t2.ID
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
Mederr's context transform works perfectly. If you need to extract orientation only use this function - you don't need any EXIF-reading libs. Below is a function for re-setting orientation in base64 image. Here's a fiddle for it. I've also prepared a fiddle with orientation extraction demo.
function resetOrientation(srcBase64, srcOrientation, callback) {
var img = new Image();
img.onload = function() {
var width = img.width,
height = img.height,
canvas = document.createElement('canvas'),
ctx = canvas.getContext("2d");
// set proper canvas dimensions before transform & export
if (4 < srcOrientation && srcOrientation < 9) {
canvas.width = height;
canvas.height = width;
} else {
canvas.width = width;
canvas.height = height;
}
// transform context before drawing image
switch (srcOrientation) {
case 2: ctx.transform(-1, 0, 0, 1, width, 0); break;
case 3: ctx.transform(-1, 0, 0, -1, width, height); break;
case 4: ctx.transform(1, 0, 0, -1, 0, height); break;
case 5: ctx.transform(0, 1, 1, 0, 0, 0); break;
case 6: ctx.transform(0, 1, -1, 0, height, 0); break;
case 7: ctx.transform(0, -1, -1, 0, height, width); break;
case 8: ctx.transform(0, -1, 1, 0, 0, width); break;
default: break;
}
// draw image
ctx.drawImage(img, 0, 0);
// export base64
callback(canvas.toDataURL());
};
img.src = srcBase64;
};
Get top n records for each group of grouped results
Here is one way to do this, using UNION ALL (See SQL Fiddle with Demo). This works with two groups, if you have more than two groups, then you would need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variety of ways to do this, see this article to determine the best route for your situation:
http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/
Edit:
This might work for you too, it generates a row number for each record. Using an example from the link above this will return only those records with a row number of less than or equal to 2:
select person, `group`, age
from
(
select person, `group`, age,
(@num:=if(@group = `group`, @num +1, if(@group := `group`, 1, 1))) row_number
from test t
CROSS JOIN (select @num:=0, @group:=null) c
order by `Group`, Age desc, person
) as x
where x.row_number <= 2;
See Demo
Debugging JavaScript in IE7
Web Development Helper is very good.
The IE Dev Toolbar is often helpful, but unfortunately doesn't do script debugging
java.lang.UnsupportedClassVersionError Unsupported major.minor version 51.0
Version 51 is Java 7, you probably use the wrong JDK. Check JAVA_HOME.
How to get instance variables in Python?
Sometimes you want to filter the list based on public/private vars. E.g.
def pub_vars(self):
"""Gives the variable names of our instance we want to expose
"""
return [k for k in vars(self) if not k.startswith('_')]
How do I add PHP code/file to HTML(.html) files?
I think writing PHP into an .html file is confusing and anti-natural. Why would you do that??
Anyway, if what you want is to execute PHP files and show them as .html in the address bar, an easiest solution would be using .php as normal, and write a rule in your .htaccess like this:
RewriteRule ^([^.]+)\.html$ $1.php [L]
destination path already exists and is not an empty directory
If you got Destination path XXX already exists means the name of the project repository which you are trying to clone is already there in that current directory. So please cross-check and delete any existing one and try to clone it again
TypeError: 'dict_keys' object does not support indexing
Clearly you're passing in d.keys() to your shuffle function. Probably this was written with python2.x (when d.keys() returned a list). With python3.x, d.keys() returns a dict_keys object which behaves a lot more like a set than a list. As such, it can't be indexed.
The solution is to pass list(d.keys()) (or simply list(d)) to shuffle.
Byte[] to InputStream or OutputStream
I'm assuming you mean that 'use' means read, but what i'll explain for the read case can be basically reversed for the write case.
so you end up with a byte[]. this could represent any kind of data which may need special types of conversions (character, encrypted, etc). let's pretend you want to write this data as is to a file.
firstly you could create a ByteArrayInputStream which is basically a mechanism to supply the bytes to something in sequence.
then you could create a FileOutputStream for the file you want to create. there are many types of InputStreams and OutputStreams for different data sources and destinations.
lastly you would write the InputStream to the OutputStream. in this case, the array of bytes would be sent in sequence to the FileOutputStream for writing. For this i recommend using IOUtils
byte[] bytes = ...;//
ByteArrayInputStream in = new ByteArrayInputStream(bytes);
FileOutputStream out = new FileOutputStream(new File(...));
IOUtils.copy(in, out);
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
and in reverse
FileInputStream in = new FileInputStream(new File(...));
ByteArrayOutputStream out = new ByteArrayOutputStream();
IOUtils.copy(in, out);
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(out);
byte[] bytes = out.toByteArray();
if you use the above code snippets you'll need to handle exceptions and i recommend you do the 'closes' in a finally block.
What are NDF Files?
An NDF file is a user defined secondary database file of Microsoft SQL Server with an extension .ndf, which store user data. Moreover, when the size of the database file growing automatically from its specified size, you can use .ndf file for extra storage and the .ndf file could be stored on a separate disk drive. Every NDF file uses the same filename as its corresponding MDF file. We cannot open an .ndf file in SQL Server Without attaching its associated .mdf file.
find files by extension, *.html under a folder in nodejs
Install
you can install this package walk-sync by
yarn add walk-sync
Usage
const walkSync = require("walk-sync");
const paths = walkSync("./project1/src", {globs: ["**/*.html"]});
console.log(paths); //all html file path array
SSLHandshakeException: No subject alternative names present
Thanks,Bruno for giving me heads up on Common Name and Subject Alternative Name. As we figured out certificate was generated with CN with DNS name of network and asked for regeneration of new certificate with Subject Alternative Name entry i.e. san=ip:10.0.0.1. which is the actual solution.
But, we managed to find out a workaround with which we can able to run on development phase. Just add a static block in the class from which we are making ssl connection.
static {
HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier()
{
public boolean verify(String hostname, SSLSession session)
{
// ip address of the service URL(like.23.28.244.244)
if (hostname.equals("23.28.244.244"))
return true;
return false;
}
});
}
If you happen to be using Java 8, there is a much slicker way of achieving the same result:
static {
HttpsURLConnection.setDefaultHostnameVerifier((hostname, session) -> hostname.equals("127.0.0.1"));
}
Bootstrap modal not displaying
Delete the data-target attribute from button type. Then add onClick="$('#your_modal_name').modal('show')" in the button tag. I hope it will work as I faced the same problem & I fixed the issue by calling the show class of modal via jQuery.
How do I load an org.w3c.dom.Document from XML in a string?
Whoa there!
There's a potentially serious problem with this code, because it ignores the character encoding specified in the String (which is UTF-8 by default). When you call String.getBytes() the platform default encoding is used to encode Unicode characters to bytes. So, the parser may think it's getting UTF-8 data when in fact it's getting EBCDIC or something… not pretty!
Instead, use the parse method that takes an InputSource, which can be constructed with a Reader, like this:
import java.io.StringReader;
import org.xml.sax.InputSource;
…
return builder.parse(new InputSource(new StringReader(xml)));
It may not seem like a big deal, but ignorance of character encoding issues leads to insidious code rot akin to y2k.
How to configure Glassfish Server in Eclipse manually
For Eclipse Mars use the similar approach as harshit.
1) Help -> Install New Software
2) Use url: http://download.oracle.com/otn_software/oepe/mars repository Above is the OEPE tool provided by oracle for EE development.
3) From all the suggestions, select Glassfish Tools, (Oracle Weblogic Server Tools, Oracle Weblogic Scripting Tools, Oracle patches, Oracle Maven Tools).
4) Install it.
5) Restart eclipse
In point 3) are 4 tools are in braces, I don't know minimal combination, but only install Glassfish Tools has no effect.
During restart Oepe ask for Java 8 JDK if Eclipse run on on older version.
Eclipse 4.5.0 Mars JDK : 1.8
JavaScript for detecting browser language preference
var language = navigator.languages && navigator.languages[0] || // Chrome / Firefox_x000D_
navigator.language || // All browsers_x000D_
navigator.userLanguage; // IE <= 10_x000D_
_x000D_
console.log(language);- https://developer.mozilla.org/en-US/docs/Web/API/NavigatorLanguage/languages
- https://developer.mozilla.org/en-US/docs/Web/API/NavigatorLanguage/language
Try PWA Template https://github.com/StartPolymer/progressive-web-app-template
Find out where MySQL is installed on Mac OS X
It will be found in /usr/local/mysql if you use the mysql binaries or dmg to install it on your system instead of using MAMP
How can I detect whether an iframe is loaded?
You may try this (using jQuery)
$(function(){_x000D_
$('#MainPopupIframe').load(function(){_x000D_
$(this).show();_x000D_
console.log('iframe loaded successfully')_x000D_
});_x000D_
_x000D_
$('#click').on('click', function(){_x000D_
$('#MainPopupIframe').attr('src', 'https://heera.it'); _x000D_
});_x000D_
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<button id='click'>click me</button>_x000D_
_x000D_
<iframe style="display:none" id='MainPopupIframe' src='' /></iframe>Update: Using plain javascript
window.onload=function(){_x000D_
var ifr=document.getElementById('MainPopupIframe');_x000D_
ifr.onload=function(){_x000D_
this.style.display='block';_x000D_
console.log('laod the iframe')_x000D_
};_x000D_
var btn=document.getElementById('click'); _x000D_
btn.onclick=function(){_x000D_
ifr.src='https://heera.it'; _x000D_
};_x000D_
};<button id='click'>click me</button>_x000D_
_x000D_
<iframe style="display:none" id='MainPopupIframe' src='' /></iframe>Update: Also you can try this (dynamic iframe)
$(function(){_x000D_
$('#click').on('click', function(){_x000D_
var ifr=$('<iframe/>', {_x000D_
id:'MainPopupIframe',_x000D_
src:'https://heera.it',_x000D_
style:'display:none;width:320px;height:400px',_x000D_
load:function(){_x000D_
$(this).show();_x000D_
alert('iframe loaded !');_x000D_
}_x000D_
});_x000D_
$('body').append(ifr); _x000D_
});_x000D_
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<button id='click'>click me</button><br />How to break out of while loop in Python?
A couple of changes mean that only an R or r will roll. Any other character will quit
import random
while True:
print('Your score so far is {}.'.format(myScore))
print("Would you like to roll or quit?")
ans = input("Roll...")
if ans.lower() == 'r':
R = np.random.randint(1, 8)
print("You rolled a {}.".format(R))
myScore = R + myScore
else:
print("Now I'll see if I can break your score...")
break
Can you split a stream into two streams?
This is against the general mechanism of Stream. Say you can split Stream S0 to Sa and Sb like you wanted. Performing any terminal operation, say count(), on Sa will necessarily "consume" all elements in S0. Therefore Sb lost its data source.
Previously, Stream had a tee() method, I think, which duplicate a stream to two. It's removed now.
Stream has a peek() method though, you might be able to use it to achieve your requirements.
How to iterate for loop in reverse order in swift?
With Swift 5, according to your needs, you may choose one of the four following Playground code examples in order to solve your problem.
#1. Using ClosedRange reversed() method
ClosedRange has a method called reversed(). reversed() method has the following declaration:
func reversed() -> ReversedCollection<ClosedRange<Bound>>
Returns a view presenting the elements of the collection in reverse order.
Usage:
let reversedCollection = (0 ... 5).reversed()
for index in reversedCollection {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
As an alternative, you can use Range reversed() method:
let reversedCollection = (0 ..< 6).reversed()
for index in reversedCollection {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
#2. Using sequence(first:next:) function
Swift Standard Library provides a function called sequence(first:next:). sequence(first:next:) has the following declaration:
func sequence<T>(first: T, next: @escaping (T) -> T?) -> UnfoldFirstSequence<T>
Returns a sequence formed from
firstand repeated lazy applications ofnext.
Usage:
let unfoldSequence = sequence(first: 5, next: {
$0 > 0 ? $0 - 1 : nil
})
for index in unfoldSequence {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
#3. Using stride(from:through:by:) function
Swift Standard Library provides a function called stride(from:through:by:). stride(from:through:by:) has the following declaration:
func stride<T>(from start: T, through end: T, by stride: T.Stride) -> StrideThrough<T> where T : Strideable
Returns a sequence from a starting value toward, and possibly including, an end value, stepping by the specified amount.
Usage:
let sequence = stride(from: 5, through: 0, by: -1)
for index in sequence {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
As an alternative, you can use stride(from:to:by:):
let sequence = stride(from: 5, to: -1, by: -1)
for index in sequence {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
#4. Using AnyIterator init(_:) initializer
AnyIterator has an initializer called init(_:). init(_:) has the following declaration:
init(_ body: @escaping () -> AnyIterator<Element>.Element?)
Creates an iterator that wraps the given closure in its
next()method.
Usage:
var index = 5
guard index >= 0 else { fatalError("index must be positive or equal to zero") }
let iterator = AnyIterator({ () -> Int? in
defer { index = index - 1 }
return index >= 0 ? index : nil
})
for index in iterator {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
If needed, you can refactor the previous code by creating an extension method for Int and wrapping your iterator in it:
extension Int {
func iterateDownTo(_ endIndex: Int) -> AnyIterator<Int> {
var index = self
guard index >= endIndex else { fatalError("self must be greater than or equal to endIndex") }
let iterator = AnyIterator { () -> Int? in
defer { index = index - 1 }
return index >= endIndex ? index : nil
}
return iterator
}
}
let iterator = 5.iterateDownTo(0)
for index in iterator {
print(index)
}
/*
Prints:
5
4
3
2
1
0
*/
jQuery Set Cursor Position in Text Area
I do realize that this is a very old post, but I thought that I should offer perhaps a simpler solution to update it using only jQuery.
function getTextCursorPosition(ele) {
return ele.prop("selectionStart");
}
function setTextCursorPosition(ele,pos) {
ele.prop("selectionStart", pos + 1);
ele.prop("selectionEnd", pos + 1);
}
function insertNewLine(text,cursorPos) {
var firstSlice = text.slice(0,cursorPos);
var secondSlice = text.slice(cursorPos);
var new_text = [firstSlice,"\n",secondSlice].join('');
return new_text;
}
Usage for using ctrl-enter to add a new line (like in Facebook):
$('textarea').on('keypress',function(e){
if (e.keyCode == 13 && !e.ctrlKey) {
e.preventDefault();
//do something special here with just pressing Enter
}else if (e.ctrlKey){
//If the ctrl key was pressed with the Enter key,
//then enter a new line break into the text
var cursorPos = getTextCursorPosition($(this));
$(this).val(insertNewLine($(this).val(), cursorPos));
setTextCursorPosition($(this), cursorPos);
}
});
I am open to critique. Thank you.
UPDATE: This solution does not allow normal copy and paste functionality to work (i.e. ctrl-c, ctrl-v), so I will have to edit this in the future to make sure that part works again. If you have an idea how to do that, please comment here, and I will be happy to test it out. Thanks.
How to use a ViewBag to create a dropdownlist?
@Html.DropDownListFor(m => m.Departments.id, (SelectList)ViewBag.Department, "Select", htmlAttributes: new { @class = "form-control" })
How can I make my custom objects Parcelable?
It is very easy, you can use a plugin on android studio to make objects Parcelables.
public class Persona implements Parcelable {
String nombre;
int edad;
Date fechaNacimiento;
public Persona(String nombre, int edad, Date fechaNacimiento) {
this.nombre = nombre;
this.edad = edad;
this.fechaNacimiento = fechaNacimiento;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(this.nombre);
dest.writeInt(this.edad);
dest.writeLong(fechaNacimiento != null ? fechaNacimiento.getTime() : -1);
}
protected Persona(Parcel in) {
this.nombre = in.readString();
this.edad = in.readInt();
long tmpFechaNacimiento = in.readLong();
this.fechaNacimiento = tmpFechaNacimiento == -1 ? null : new Date(tmpFechaNacimiento);
}
public static final Parcelable.Creator<Persona> CREATOR = new Parcelable.Creator<Persona>() {
public Persona createFromParcel(Parcel source) {
return new Persona(source);
}
public Persona[] newArray(int size) {
return new Persona[size];
}
};}
Definition of int64_t
My 2 cents, from a current implementation Point of View and for SWIG users on k8 (x86_64) architecture.
Linux
First long long and long int are different types
but sizeof(long long) == sizeof(long int) == sizeof(int64_t)
Gcc
First try to find where and how the compiler define int64_t and uint64_t
grepc -rn "typedef.*INT64_TYPE" /lib/gcc
/lib/gcc/x86_64-linux-gnu/9/include/stdint-gcc.h:43:typedef __INT64_TYPE__ int64_t;
/lib/gcc/x86_64-linux-gnu/9/include/stdint-gcc.h:55:typedef __UINT64_TYPE__ uint64_t;
So we need to find this compiler macro definition
gcc -dM -E -x c /dev/null | grep __INT64
#define __INT64_C(c) c ## L
#define __INT64_MAX__ 0x7fffffffffffffffL
#define __INT64_TYPE__ long int
gcc -dM -E -x c++ /dev/null | grep __INT64
#define __INT64_C(c) c ## L
#define __INT64_MAX__ 0x7fffffffffffffffL
#define __INT64_TYPE__ long int
Clang
clang -dM -E -x c++ /dev/null | grep INT64_TYPE
#define __INT64_TYPE__ long int
#define __UINT64_TYPE__ long unsigned int
Clang, GNU compilers:
-dM dumps a list of macros.
-E prints results to stdout instead of a file.
-x c and -x c++ select the programming language when using a file without a filename extension, such as /dev/null
note: for swig user, on Linux x86_64 use -DSWIGWORDSIZE64
MacOS
On Catalina 10.15 IIRC
Clang
clang -dM -E -x c++ /dev/null | grep INT64_TYPE
#define __INT64_TYPE__ long long int
#define __UINT64_TYPE__ long long unsigned int
Clang:
-dM dumps a list of macros.
-E prints results to stdout instead of a file.
-x c and -x c++ select the programming language when using a file without a filename extension, such as /dev/null
note: for swig user, on macOS x86_64 don't use -DSWIGWORDSIZE64
Visual Studio 2019
First
sizeof(long int) == 4 and sizeof(long long) == 8
in stdint.h we have:
#if _VCRT_COMPILER_PREPROCESSOR
typedef signed char int8_t;
typedef short int16_t;
typedef int int32_t;
typedef long long int64_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef unsigned long long uint64_t;
note: for swig user, on windows x86_64 don't use -DSWIGWORDSIZE64
SWIG Stuff
First see https://github.com/swig/swig/blob/3a329566f8ae6210a610012ecd60f6455229fe77/Lib/stdint.i#L20-L24 so you can control the typedef using SWIGWORDSIZE64 but...
now the bad: SWIG Java and SWIG CSHARP do not take it into account
So you may want to use
#if defined(SWIGJAVA)
#if defined(SWIGWORDSIZE64)
%define PRIMITIVE_TYPEMAP(NEW_TYPE, TYPE)
%clear NEW_TYPE;
%clear NEW_TYPE *;
%clear NEW_TYPE &;
%clear const NEW_TYPE &;
%apply TYPE { NEW_TYPE };
%apply TYPE * { NEW_TYPE * };
%apply TYPE & { NEW_TYPE & };
%apply const TYPE & { const NEW_TYPE & };
%enddef // PRIMITIVE_TYPEMAP
PRIMITIVE_TYPEMAP(long int, long long);
PRIMITIVE_TYPEMAP(unsigned long int, long long);
#undef PRIMITIVE_TYPEMAP
#endif // defined(SWIGWORDSIZE64)
#endif // defined(SWIGJAVA)
and
#if defined(SWIGCSHARP)
#if defined(SWIGWORDSIZE64)
%define PRIMITIVE_TYPEMAP(NEW_TYPE, TYPE)
%clear NEW_TYPE;
%clear NEW_TYPE *;
%clear NEW_TYPE &;
%clear const NEW_TYPE &;
%apply TYPE { NEW_TYPE };
%apply TYPE * { NEW_TYPE * };
%apply TYPE & { NEW_TYPE & };
%apply const TYPE & { const NEW_TYPE & };
%enddef // PRIMITIVE_TYPEMAP
PRIMITIVE_TYPEMAP(long int, long long);
PRIMITIVE_TYPEMAP(unsigned long int, unsigned long long);
#undef PRIMITIVE_TYPEMAP
#endif // defined(SWIGWORDSIZE64)
#endif // defined(SWIGCSHARP)
So int64_t aka long int will be bind to Java/C# long on Linux...
When is it acceptable to call GC.Collect?
Scott Holden's blog entry on when to (and when not to) call GC.Collect is specific to the .NET Compact Framework, but the rules generally apply to all managed development.
Execute an action when an item on the combobox is selected
The simple solution would be to use a ItemListener. When the state changes, you would simply check the currently selected item and set the text accordingly
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestComboBox06 {
public static void main(String[] args) {
new TestComboBox06();
}
public TestComboBox06() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JComboBox cb;
private JTextField field;
public TestPane() {
cb = new JComboBox(new String[]{"Item 1", "Item 2"});
field = new JTextField(12);
add(cb);
add(field);
cb.setSelectedItem(null);
cb.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
Object item = cb.getSelectedItem();
if ("Item 1".equals(item)) {
field.setText("20");
} else if ("Item 2".equals(item)) {
field.setText("30");
}
}
});
}
}
}
A better solution would be to create a custom object that represents the value to be displayed and the value associated with it...
Updated
Now I no longer have a 10 month chewing on my ankles, I updated the example to use a ListCellRenderer which is a more correct approach then been lazy and overriding toString
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestComboBox06 {
public static void main(String[] args) {
new TestComboBox06();
}
public TestComboBox06() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JComboBox cb;
private JTextField field;
public TestPane() {
cb = new JComboBox(new Item[]{
new Item("Item 1", "20"),
new Item("Item 2", "30")});
cb.setRenderer(new ItemCelLRenderer());
field = new JTextField(12);
add(cb);
add(field);
cb.setSelectedItem(null);
cb.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
Item item = (Item)cb.getSelectedItem();
field.setText(item.getValue());
}
});
}
}
public class Item {
private String value;
private String text;
public Item(String text, String value) {
this.text = text;
this.value = value;
}
public String getText() {
return text;
}
public String getValue() {
return value;
}
}
public class ItemCelLRenderer extends DefaultListCellRenderer {
@Override
public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus); //To change body of generated methods, choose Tools | Templates.
if (value instanceof Item) {
setText(((Item)value).getText());
}
return this;
}
}
}
Why can't I set text to an Android TextView?
Or you can do this way :
((TextView)findViewById(R.id.this_is_the_id_of_textview)).setText("Test");
How to stop a vb script running in windows
I can think of at least 2 different ways:
using Task Manager (Ctrl-Shift-Esc), select the process tab, look for a process name cscript.exe or wscript.exe and use End Process.
From the command line you could use taskkill /fi "imagename eq cscript.exe" (change to wscript.exe as needed)
Another way is using scripting and WMI. Here are some hints: look for the Win32_Process class and the Terminate method.
How do I redirect users after submit button click?
I hope this might be helpful
<script type="text/javascript">_x000D_
function redirect() {_x000D_
document.getElementById("formid").submit();_x000D_
}_x000D_
window.onload = redirect;_x000D_
</script><form id="formid" method="post" action="anypage.jsp">_x000D_
........._x000D_
</form>Read Post Data submitted to ASP.Net Form
NameValueCollection nvclc = Request.Form;
string uName= nvclc ["txtUserName"];
string pswod= nvclc ["txtPassword"];
//try login
CheckLogin(uName, pswod);
socket.shutdown vs socket.close
Here's one explanation:
Once a socket is no longer required, the calling program can discard the socket by applying a close subroutine to the socket descriptor. If a reliable delivery socket has data associated with it when a close takes place, the system continues to attempt data transfer. However, if the data is still undelivered, the system discards the data. Should the application program have no use for any pending data, it can use the shutdown subroutine on the socket prior to closing it.
In Typescript, How to check if a string is Numeric
Most of the time the value that we want to check is string or number, so here is function that i use:
const isNumber = (n: string | number): boolean =>
!isNaN(parseFloat(String(n))) && isFinite(Number(n));
const willBeTrue = [0.1, '1', '-1', 1, -1, 0, -0, '0', "-0", 2e2, 1e23, 1.1, -0.1, '0.1', '2e2', '1e23', '-0.1', ' 898', '080']
const willBeFalse = ['9BX46B6A', "+''", '', '-0,1', [], '123a', 'a', 'NaN', 1e10000, undefined, null, NaN, Infinity, () => {}]
How to pick element inside iframe using document.getElementById
(this is to add to the chosen answer)
Make sure the iframe is loaded before you
contentWindow.document
Otherwise, your getElementById will be null.
PS: Can't comment, still low reputation to comment, but this is a follow-up on the chosen answer as I've spent some good debugging time trying to figure out I should force the iframe load before selecting the inner-iframe element.
How do write IF ELSE statement in a MySQL query
you must write it in SQL not it C/PHP style
IF( action = 2 AND state = 0, 1, 0 ) AS state
for use in query
IF ( action = 2 AND state = 0 ) THEN SET state = 1
for use in stored procedures or functions
Difference between volatile and synchronized in Java
synchronized is method level/block level access restriction modifier. It will make sure that one thread owns the lock for critical section. Only the thread,which own a lock can enter synchronized block. If other threads are trying to access this critical section, they have to wait till current owner releases the lock.
volatile is variable access modifier which forces all threads to get latest value of the variable from main memory. No locking is required to access volatile variables. All threads can access volatile variable value at same time.
A good example to use volatile variable : Date variable.
Assume that you have made Date variable volatile. All the threads, which access this variable always get latest data from main memory so that all threads show real (actual) Date value. You don't need different threads showing different time for same variable. All threads should show right Date value.
Have a look at this article for better understanding of volatile concept.
Lawrence Dol cleary explained your read-write-update query.
Regarding your other queries
When is it more suitable to declare variables volatile than access them through synchronized?
You have to use volatile if you think all threads should get actual value of the variable in real time like the example I have explained for Date variable.
Is it a good idea to use volatile for variables that depend on input?
Answer will be same as in first query.
Refer to this article for better understanding.
C# winforms combobox dynamic autocomplete
Take 2. My answer below didn't get me all the way to the desired result, but it may still be useful to somebody. The auto-select feature of the ComboBox was causing me major pain. This one uses a TextBox sitting over the top of a ComboBox, allowing me to ignore whatever appears in the ComboBox itself and just respond to the selection changed event.
- Create Form
- Add ComboBox
- Set desired size and location
- Set DropDownStyle to DropDown
- Set TabStop to false
- Set DisplayMember to Value (I'm using a list of KeyValuePairs)
- Set ValueMember to Key
- Add Panel
- Set to same size as ComboBox
- Cover ComboBox with the Panel (This accounts for the standard ComboBox being taller than the standard TextBox)
- Add TextBox
- Place TextBox over the top of the Panel
- Align bottom of the TextBox with the bottom of Panel/ComboBox
Code behind
public partial class TestForm : Form
{
// Custom class for managing calls to an external address finder service
private readonly AddressFinder _addressFinder;
// Events for handling async calls to address finder service
private readonly AddressSuggestionsUpdatedEventHandler _addressSuggestionsUpdated;
private delegate void AddressSuggestionsUpdatedEventHandler(object sender, AddressSuggestionsUpdatedEventArgs e);
public TestForm()
{
InitializeComponent();
_addressFinder = new AddressFinder(new AddressFinderConfigurationProvider());
_addressSuggestionsUpdated += AddressSuggestions_Updated;
}
private void textBox1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Tab)
{
comboBox1_SelectionChangeCommitted(sender, e);
comboBox1.DroppedDown = false;
}
}
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Up)
{
if (comboBox1.Items.Count > 0)
{
if (comboBox1.SelectedIndex > 0)
{
comboBox1.SelectedIndex--;
}
}
e.Handled = true;
}
else if (e.KeyCode == Keys.Down)
{
if (comboBox1.Items.Count > 0)
{
if (comboBox1.SelectedIndex < comboBox1.Items.Count - 1)
{
comboBox1.SelectedIndex++;
}
}
e.Handled = true;
}
else if (e.KeyCode == Keys.Enter)
{
comboBox1_SelectionChangeCommitted(sender, e);
comboBox1.DroppedDown = false;
textBox1.SelectionStart = textBox1.TextLength;
e.Handled = true;
}
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == '\r') // Enter key
{
e.Handled = true;
return;
}
if (char.IsControl(e.KeyChar) && e.KeyChar != '\b') // Backspace key
{
return;
}
if (textBox1.Text.Length > 1)
{
Task.Run(() => GetAddressSuggestions(textBox1.Text));
}
}
private void comboBox1_SelectionChangeCommitted(object sender, EventArgs e)
{
if (comboBox1.Items.Count > 0 &&
comboBox1.SelectedItem.IsNotNull() &&
comboBox1.SelectedItem is KeyValuePair<string, string>)
{
var selectedItem = (KeyValuePair<string, string>)comboBox1.SelectedItem;
textBox1.Text = selectedItem.Value;
// Do Work with selectedItem
}
}
private async Task GetAddressSuggestions(string searchString)
{
var addressSuggestions = await _addressFinder.CompleteAsync(searchString).ConfigureAwait(false);
if (_addressSuggestionsUpdated.IsNotNull())
{
_addressSuggestionsUpdated.Invoke(this, new AddressSuggestionsUpdatedEventArgs(addressSuggestions));
}
}
private void AddressSuggestions_Updated(object sender, AddressSuggestionsUpdatedEventArgs eventArgs)
{
try
{
ThreadingHelper.BeginUpdate(comboBox1);
ThreadingHelper.ClearItems(comboBox1);
if (eventArgs.AddressSuggestions.Count > 0)
{
foreach (var addressSuggestion in eventArgs.AddressSuggestions)
{
var item = new KeyValuePair<string, string>(addressSuggestion.Key, addressSuggestion.Value.ToUpper());
ThreadingHelper.AddItem(comboBox1, item);
}
ThreadingHelper.SetDroppedDown(comboBox1, true);
ThreadingHelper.SetVisible(comboBox1, true);
}
else
{
ThreadingHelper.SetDroppedDown(comboBox1, false);
}
}
finally
{
ThreadingHelper.EndUpdate(comboBox1);
}
}
private class AddressSuggestionsUpdatedEventArgs : EventArgs
{
public IList<KeyValuePair<string, string>> AddressSuggestions { get; }
public AddressSuggestionsUpdatedEventArgs(IList<KeyValuePair<string, string>> addressSuggestions)
{
AddressSuggestions = addressSuggestions;
}
}
}
You may or may not have issues with setting the DroppedDown property of the ComboBox. I eventually just wrapped it up in a try block with an empty catch block. Not a great solution, but it works.
Please see my other answer below for info on ThreadingHelpers.
Enjoy.
What does the PHP error message "Notice: Use of undefined constant" mean?
you probably forgot to use "".
For exemple:
$_array[text] = $_var;
change to:
$_array["text"] = $_var;
Call break in nested if statements
Actually there is no c3 in the sample code in the original question. So the if would be more properly
if (c1 && c2) {
//sequence 1
} else if (!c1 && !c2) {
// sequence 3
}
Find and replace words/lines in a file
public static void replaceFileString(String old, String new) throws IOException {
String fileName = Settings.getValue("fileDirectory");
FileInputStream fis = new FileInputStream(fileName);
String content = IOUtils.toString(fis, Charset.defaultCharset());
content = content.replaceAll(old, new);
FileOutputStream fos = new FileOutputStream(fileName);
IOUtils.write(content, new FileOutputStream(fileName), Charset.defaultCharset());
fis.close();
fos.close();
}
above is my implementation of Meriton's example that works for me. The fileName is the directory (ie. D:\utilities\settings.txt). I'm not sure what character set should be used, but I ran this code on a Windows XP machine just now and it did the trick without doing that temporary file creation and renaming stuff.
How do you set a JavaScript onclick event to a class with css
Asking about "a class" in the question title, the answer is getElementsByClassName:
var hrefs = document.getElementsByClassName("YOUR-CLASS-NAME-HERE");
for (var i = 0; i < hrefs.length; i++) {
hrefs.item(i).addEventListener('click', function(e){
e.preventDefault(); /*use if you want to prevent the original link following action*/
alert('hohoho');
});
}
MySQL: Convert INT to DATETIME
SELECT FROM_UNIXTIME(mycolumn)
FROM mytable
Python: how to print range a-z?
Assuming this is a homework ;-) - no need to summon libraries etc - it probably expect you to use range() with chr/ord, like so:
for i in range(ord('a'), ord('n')+1):
print chr(i),
For the rest, just play a bit more with the range()
Modifying a file inside a jar
You can use Vim:
vim my.jar
Vim is able to edit compressed text files, given you have unzip in your environment.
sendmail: how to configure sendmail on ubuntu?
Combine two answers above, I finally make it work. Just be careful that the first single quote for each string is a backtick (`) in file sendmail.mc.
#Change to your mail config directory:
cd /etc/mail
#Make a auth subdirectory
mkdir auth
chmod 700 auth #maybe not, because I cannot apply cmd "cd auth" if I do so.
#Create a file with your auth information to the smtp server
cd auth
touch client-info
#In the file, put the following, matching up to your smtp server:
AuthInfo:your.isp.net "U:root" "I:user" "P:password"
#Generate the Authentication database, make both files readable only by root
makemap hash client-info < client-info
chmod 600 client-info
cd ..
#Add the following lines to sendmail.mc. Make sure you update your smtp server
#The first single quote for each string should be changed to a backtick (`) like this:
define(`SMART_HOST',`your.isp.net')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
FEATURE(`authinfo',`hash /etc/mail/auth/client-info')dnl
#run
sudo sendmailconfig
Rearrange columns using cut
Just been working on something very similar, I am not an expert but I thought I would share the commands I have used. I had a multi column csv which I only required 4 columns out of and then I needed to reorder them.
My file was pipe '|' delimited but that can be swapped out.
LC_ALL=C cut -d$'|' -f1,2,3,8,10 ./file/location.txt | sed -E "s/(.*)\|(.*)\|(.*)\|(.*)\|(.*)/\3\|\5\|\1\|\2\|\4/" > ./newcsv.csv
Admittedly it is really rough and ready but it can be tweaked to suit!
Change column type in pandas
pandas >= 1.0
Here's a chart that summarises some of the most important conversions in pandas.
Conversions to string are trivial .astype(str) and are not shown in the figure.
"Hard" versus "Soft" conversions
Note that "conversions" in this context could either refer to converting text data into their actual data type (hard conversion), or inferring more appropriate data types for data in object columns (soft conversion). To illustrate the difference, take a look at
df = pd.DataFrame({'a': ['1', '2', '3'], 'b': [4, 5, 6]}, dtype=object)
df.dtypes
a object
b object
dtype: object
# Actually converts string to numeric - hard conversion
df.apply(pd.to_numeric).dtypes
a int64
b int64
dtype: object
# Infers better data types for object data - soft conversion
df.infer_objects().dtypes
a object # no change
b int64
dtype: object
# Same as infer_objects, but converts to equivalent ExtensionType
df.convert_dtypes().dtypes
Install Visual Studio 2013 on Windows 7
your log files shows it is stopping on error "0x8004C000"
From MS Website (http://social.technet.microsoft.com/wiki/contents/articles/15716.visual-studio-2012-and-the-error-code-2147205120.aspx):
Setup Status
Block
Restart not required
0x80044000 [-2147205120]
Restart required
0x8004C000 [-2147172352]
Description
If the only block to be reported is “Reboot Pending,” the returned value is the Incomplete-Reboot Required value (0x80048bc7).
How to show all shared libraries used by executables in Linux?
On OS X by default there is no ldd, objdump or lsof. As an alternative, try otool -L:
$ otool -L `which openssl`
/usr/bin/openssl:
/usr/lib/libcrypto.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8)
/usr/lib/libssl.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1213.0.0)
In this example, using which openssl fills in the fully qualified path for the given executable and current user environment.
bash string equality
There's no difference, == is a synonym for = (for the C/C++ people, I assume). See here, for example.
You could double-check just to be really sure or just for your interest by looking at the bash source code, should be somewhere in the parsing code there, but I couldn't find it straightaway.
How do I bind onchange event of a TextBox using JQuery?
Here's a clue why an onchange() call might not fire your bound function:
Increasing the JVM maximum heap size for memory intensive applications
Below conf works for me:
JAVA_HOME=/JDK1.7.51-64/jdk1.7.0_51/
PATH=/JDK1.7.51-64/jdk1.7.0_51/bin:$PATH
export PATH
export JAVA_HOME
JVM_ARGS="-d64 -Xms1024m -Xmx15360m -server"
/JDK1.7.51-64/jdk1.7.0_51/bin/java $JVM_ARGS -jar `dirname $0`/ApacheJMeter.jar "$@"
How to add soap header in java
i was facing the same issue and solved it by removing the xmlns:wsu attribute.Try not adding it in the usernameToken.Hope this solves your issue too.
Pandas percentage of total with groupby
I know that this is an old question, but exp1orer's answer is very slow for datasets with a large number unique groups (probably because of the lambda). I built off of their answer to turn it into an array calculation so now it's super fast! Below is the example code:
Create the test dataframe with 50,000 unique groups
import random
import string
import pandas as pd
import numpy as np
np.random.seed(0)
# This is the total number of groups to be created
NumberOfGroups = 50000
# Create a lot of groups (random strings of 4 letters)
Group1 = [''.join(random.choice(string.ascii_uppercase) for _ in range(4)) for x in range(NumberOfGroups/10)]*10
Group2 = [''.join(random.choice(string.ascii_uppercase) for _ in range(4)) for x in range(NumberOfGroups/2)]*2
FinalGroup = [''.join(random.choice(string.ascii_uppercase) for _ in range(4)) for x in range(NumberOfGroups)]
# Make the numbers
NumbersForPercents = [np.random.randint(100, 999) for _ in range(NumberOfGroups)]
# Make the dataframe
df = pd.DataFrame({'Group 1': Group1,
'Group 2': Group2,
'Final Group': FinalGroup,
'Numbers I want as percents': NumbersForPercents})
When grouped it looks like:
Numbers I want as percents
Group 1 Group 2 Final Group
AAAH AQYR RMCH 847
XDCL 182
DQGO ALVF 132
AVPH 894
OVGH NVOO 650
VKQP 857
VNLY HYFW 884
MOYH 469
XOOC GIDS 168
HTOY 544
AACE HNXU RAXK 243
YZNK 750
NOYI NYGC 399
ZYCI 614
QKGK CRLF 520
UXNA 970
TXAR MLNB 356
NMFJ 904
VQYG NPON 504
QPKQ 948
...
[50000 rows x 1 columns]
Array method of finding percentage:
# Initial grouping (basically a sorted version of df)
PreGroupby_df = df.groupby(["Group 1","Group 2","Final Group"]).agg({'Numbers I want as percents': 'sum'}).reset_index()
# Get the sum of values for the "final group", append "_Sum" to it's column name, and change it into a dataframe (.reset_index)
SumGroup_df = df.groupby(["Group 1","Group 2"]).agg({'Numbers I want as percents': 'sum'}).add_suffix('_Sum').reset_index()
# Merge the two dataframes
Percents_df = pd.merge(PreGroupby_df, SumGroup_df)
# Divide the two columns
Percents_df["Percent of Final Group"] = Percents_df["Numbers I want as percents"] / Percents_df["Numbers I want as percents_Sum"] * 100
# Drop the extra _Sum column
Percents_df.drop(["Numbers I want as percents_Sum"], inplace=True, axis=1)
This method takes about ~0.15 seconds
Top answer method (using lambda function):
state_office = df.groupby(['Group 1','Group 2','Final Group']).agg({'Numbers I want as percents': 'sum'})
state_pcts = state_office.groupby(level=['Group 1','Group 2']).apply(lambda x: 100 * x / float(x.sum()))
This method takes about ~21 seconds to produce the same result.
The result:
Group 1 Group 2 Final Group Numbers I want as percents Percent of Final Group
0 AAAH AQYR RMCH 847 82.312925
1 AAAH AQYR XDCL 182 17.687075
2 AAAH DQGO ALVF 132 12.865497
3 AAAH DQGO AVPH 894 87.134503
4 AAAH OVGH NVOO 650 43.132050
5 AAAH OVGH VKQP 857 56.867950
6 AAAH VNLY HYFW 884 65.336290
7 AAAH VNLY MOYH 469 34.663710
8 AAAH XOOC GIDS 168 23.595506
9 AAAH XOOC HTOY 544 76.404494
Simple state machine example in C#?
You can code an iterator block that lets you execute a code block in an orchestrated fashion. How the code block is broken up really doesn't have to correspond to anything, it's just how you want to code it. For example:
IEnumerable<int> CountToTen()
{
System.Console.WriteLine("1");
yield return 0;
System.Console.WriteLine("2");
System.Console.WriteLine("3");
System.Console.WriteLine("4");
yield return 0;
System.Console.WriteLine("5");
System.Console.WriteLine("6");
System.Console.WriteLine("7");
yield return 0;
System.Console.WriteLine("8");
yield return 0;
System.Console.WriteLine("9");
System.Console.WriteLine("10");
}
In this case, when you call CountToTen, nothing actually executes, yet. What you get is effectively a state machine generator, for which you can create a new instance of the state machine. You do this by calling GetEnumerator(). The resulting IEnumerator is effectively a state machine that you can drive by calling MoveNext(...).
Thus, in this example, the first time you call MoveNext(...) you will see "1" written to the console, and the next time you call MoveNext(...) you will see 2, 3, 4, and then 5, 6, 7 and then 8, and then 9, 10. As you can see, it's a useful mechanism for orchestrating how things should occur.
How to disable scrolling temporarily?
This solution will maintain the current scroll position whilst scrolling is disabled, unlike some which jump the user back to the top.
It's based on galambalazs' answer, but with support for touch devices, and refactored as a single object with jquery plugin wrapper.
/**
* $.disablescroll
* Author: Josh Harrison - aloof.co
*
* Disables scroll events from mousewheels, touchmoves and keypresses.
* Use while jQuery is animating the scroll position for a guaranteed super-smooth ride!
*/
;(function($) {
"use strict";
var instance, proto;
function UserScrollDisabler($container, options) {
// spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36
// left: 37, up: 38, right: 39, down: 40
this.opts = $.extend({
handleKeys : true,
scrollEventKeys : [32, 33, 34, 35, 36, 37, 38, 39, 40]
}, options);
this.$container = $container;
this.$document = $(document);
this.lockToScrollPos = [0, 0];
this.disable();
}
proto = UserScrollDisabler.prototype;
proto.disable = function() {
var t = this;
t.lockToScrollPos = [
t.$container.scrollLeft(),
t.$container.scrollTop()
];
t.$container.on(
"mousewheel.disablescroll DOMMouseScroll.disablescroll touchmove.disablescroll",
t._handleWheel
);
t.$container.on("scroll.disablescroll", function() {
t._handleScrollbar.call(t);
});
if(t.opts.handleKeys) {
t.$document.on("keydown.disablescroll", function(event) {
t._handleKeydown.call(t, event);
});
}
};
proto.undo = function() {
var t = this;
t.$container.off(".disablescroll");
if(t.opts.handleKeys) {
t.$document.off(".disablescroll");
}
};
proto._handleWheel = function(event) {
event.preventDefault();
};
proto._handleScrollbar = function() {
this.$container.scrollLeft(this.lockToScrollPos[0]);
this.$container.scrollTop(this.lockToScrollPos[1]);
};
proto._handleKeydown = function(event) {
for (var i = 0; i < this.opts.scrollEventKeys.length; i++) {
if (event.keyCode === this.opts.scrollEventKeys[i]) {
event.preventDefault();
return;
}
}
};
// Plugin wrapper for object
$.fn.disablescroll = function(method) {
// If calling for the first time, instantiate the object and save
// reference. The plugin can therefore only be instantiated once per
// page. You can pass options object in through the method parameter.
if( ! instance && (typeof method === "object" || ! method)) {
instance = new UserScrollDisabler(this, method);
}
// Instance already created, and a method is being explicitly called,
// e.g. .disablescroll('undo');
else if(instance && instance[method]) {
instance[method].call(instance);
}
};
// Global access
window.UserScrollDisabler = UserScrollDisabler;
})(jQuery);
Laravel - Return json along with http status code
It's better to do it with helper functions rather than Facades. This solution will work well from Laravel 5.7 onwards
//import dependency
use Illuminate\Http\Response;
//snippet
return \response()->json([
'status' => '403',//sample entry
'message' => 'ACCOUNT ACTION HAS BEEN DISABLED',//sample message
], Response::HTTP_FORBIDDEN);//Illuminate\Http\Response sets appropriate headers
Advantage of switch over if-else statement
switch is definitely preferred. It's easier to look at a switch's list of cases & know for sure what it is doing than to read the long if condition.
The duplication in the if condition is hard on the eyes. Suppose one of the == was written !=; would you notice? Or if one instance of 'numError' was written 'nmuError', which just happened to compile?
I'd generally prefer to use polymorphism instead of the switch, but without more details of the context, it's hard to say.
As for performance, your best bet is to use a profiler to measure the performance of your application in conditions that are similar to what you expect in the wild. Otherwise, you're probably optimizing in the wrong place and in the wrong way.
How to check if a string contains a substring in Bash
This also works:
if printf -- '%s' "$haystack" | egrep -q -- "$needle"
then
printf "Found needle in haystack"
fi
And the negative test is:
if ! printf -- '%s' "$haystack" | egrep -q -- "$needle"
then
echo "Did not find needle in haystack"
fi
I suppose this style is a bit more classic -- less dependent upon features of Bash shell.
The -- argument is pure POSIX paranoia, used to protected against input strings similar to options, such as --abc or -a.
Note: In a tight loop this code will be much slower than using internal Bash shell features, as one (or two) separate processes will be created and connected via pipes.
Entity Framework Migrations renaming tables and columns
For EF Core migrationBuilder.RenameColumn usually works fine but sometimes you have to handle indexes as well.
migrationBuilder.RenameColumn(name: "Identifier", table: "Questions", newName: "ChangedIdentifier", schema: "dbo");
Example error message when updating database:
Microsoft.Data.SqlClient.SqlException (0x80131904): The index 'IX_Questions_Identifier' is dependent on column 'Identifier'.
The index 'IX_Questions_Identifier' is dependent on column 'Identifier'.
RENAME COLUMN Identifier failed because one or more objects access this column.
In this case you have to do the rename like this:
migrationBuilder.DropIndex(
name: "IX_Questions_Identifier",
table: "Questions");
migrationBuilder.RenameColumn(name: "Identifier", table: "Questions", newName: "ChangedIdentifier", schema: "dbo");
migrationBuilder.CreateIndex(
name: "IX_Questions_ChangedIdentifier",
table: "Questions",
column: "ChangedIdentifier",
unique: true,
filter: "[ChangedIdentifier] IS NOT NULL");
MySQL timezone change?
While Bryon's answer is helpful, I'd just add that his link is for PHP timezone names, which are not the same as MySQL timezone names.
If you want to set your timezone for an individual session to GMT+1 (UTC+1 to be precise) just use the string '+01:00' in that command. I.e.:
SET time_zone = '+01:00';
To see what timezone your MySQL session is using, just execute this:
SELECT @@global.time_zone, @@session.time_zone;
This is a great reference with more details: MySQL 5.5 Reference on Time Zones
How to change value of object which is inside an array using JavaScript or jQuery?
to update multiple items with the matches use:
_.chain(projects).map(item => {
item.desc = item.value === "jquery-ui" ? "new desc" : item.desc;
return item;
})
Format cell color based on value in another sheet and cell
I've done this before with conditional formatting. It's a great way to visually inspect the cells in a workbook and spot the outliers in your data.
WinSCP: Permission denied. Error code: 3 Error message from server: Permission denied
You possibly do not have create permissions to the folder. So WinSCP fails to create a temporary file for the transfer.
You have two options:
Grant write permissions to the folder to the user or group you log in with (
myuser), or change the ownership of the folder to the user, orDisable a transfer to temporary file.
In Preferences, go to Transfer > Endurance page and in Enable transfer resume/transfer to temporary file name for select Disable:
Get mouse wheel events in jQuery?
I think you achieve with change and keyUp event.
See this [Working fiddle][1]
[1]: http://jsfiddle.net/vinay_kaithwas18/bgd8nypa/7/
How do I remove all non alphanumeric characters from a string except dash?
There is a much easier way with Regex.
private string FixString(string str)
{
return string.IsNullOrEmpty(str) ? str : Regex.Replace(str, "[\\D]", "");
}
How to serialize a JObject without the formatting?
you can use JsonConvert.SerializeObject()
JsonConvert.SerializeObject(myObject) // myObject is returned by JObject.Parse() method
Authentication issues with WWW-Authenticate: Negotiate
The web server is prompting you for a SPNEGO (Simple and Protected GSSAPI Negotiation Mechanism) token.
This is a Microsoft invention for negotiating a type of authentication to use for Web SSO (single-sign-on):
- either NTLM
- or Kerberos.
See:
How to completely uninstall Android Studio on Mac?
Run the following commands in the terminal:
rm -Rf /Applications/Android\ Studio.app
rm -Rf ~/Library/Preferences/AndroidStudio*
rm -Rf ~/Library/Preferences/com.google.android.*
rm -Rf ~/Library/Preferences/com.android.*
rm -Rf ~/Library/Application\ Support/AndroidStudio*
rm -Rf ~/Library/Logs/AndroidStudio*
rm -Rf ~/Library/Caches/AndroidStudio*
rm -Rf ~/.AndroidStudio*
rm -Rf ~/.gradle
rm -Rf ~/.android
rm -Rf ~/Library/Android*
rm -Rf /usr/local/var/lib/android-sdk/
To delete all projects:
rm -Rf ~/AndroidStudioProjects
Async always WaitingForActivation
The reason is your result assigned to the returning Task which represents continuation of your method, and you have a different Task in your method which is running, if you directly assign Task like this you will get your expected results:
var task = Task.Run(() =>
{
for (int i = 10; i < 432543543; i++)
{
// just for a long job
double d3 = Math.Sqrt((Math.Pow(i, 5) - Math.Pow(i, 2)) / Math.Sin(i * 8));
}
return "Foo Completed.";
});
while (task.Status != TaskStatus.RanToCompletion)
{
Console.WriteLine("Thread ID: {0}, Status: {1}", Thread.CurrentThread.ManagedThreadId,task.Status);
}
Console.WriteLine("Result: {0}", task.Result);
Console.WriteLine("Finished.");
Console.ReadKey(true);
The output:
Consider this for better explanation: You have a Foo method,let's say it Task A, and you have a Task in it,let's say it Task B, Now the running task, is Task B, your Task A awaiting for Task B result.And you assing your result variable to your returning Task which is Task A, because Task B doesn't return a Task, it returns a string. Consider this:
If you define your result like this:
Task result = Foo(5);
You won't get any error.But if you define it like this:
string result = Foo(5);
You will get:
Cannot implicitly convert type 'System.Threading.Tasks.Task' to 'string'
But if you add an await keyword:
string result = await Foo(5);
Again you won't get any error.Because it will wait the result (string) and assign it to your result variable.So for the last thing consider this, if you add two task into your Foo Method:
private static async Task<string> Foo(int seconds)
{
await Task.Run(() =>
{
for (int i = 0; i < seconds; i++)
{
Console.WriteLine("Thread ID: {0}, second {1}.", Thread.CurrentThread.ManagedThreadId, i);
Task.Delay(TimeSpan.FromSeconds(1)).Wait();
}
// in here don't return anything
});
return await Task.Run(() =>
{
for (int i = 0; i < seconds; i++)
{
Console.WriteLine("Thread ID: {0}, second {1}.", Thread.CurrentThread.ManagedThreadId, i);
Task.Delay(TimeSpan.FromSeconds(1)).Wait();
}
return "Foo Completed.";
});
}
And if you run the application, you will get the same results.(WaitingForActivation) Because now, your Task A is waiting those two tasks.
SQL ROWNUM how to return rows between a specific range
SELECT * FROM
(SELECT ROW_NUMBER() OVER(ORDER BY Id) AS RowNum, * FROM maps006) AS DerivedTable
WHERE RowNum BETWEEN 49 AND 101
What is makeinfo, and how do I get it?
For Centos , I solve it by installing these packages.
yum install texi2html texinfo
Dont worry if there is no entry for makeinfo. Just run
make all
You can do it similarly for ubuntu using sudo.
Reorder / reset auto increment primary key
This works - https://stackoverflow.com/a/5437720/10219008.....but if you run into an issue 'Error Code: 1265. Data truncated for column 'id' at row 1'...Then run the following. Adding ignore on the update query.
SET @count = 0;
set sql_mode = 'STRICT_ALL_TABLES';
UPDATE IGNORE web_keyword SET id = @count := (@count+1);
What does '<?=' mean in PHP?
An array in PHP is a map of keys to values:
$array = array();
$array["yellow"] = 3;
$array["green"] = 4;
If you want to do something with each key-value-pair in your array, you can use the foreach control structure:
foreach ($array as $key => $value)
The $array variable is the array you will be using. The $key and $value variables will contain a key-value-pair in every iteration of the foreach loop. In this example, they will first contain "yellow" and 3, then "green" and 4.
You can use an alternative notation if you don't care about the keys:
foreach ($array as $value)
What exactly are DLL files, and how do they work?
Let’s say you are making an executable that uses some functions found in a library.
If the library you are using is static, the linker will copy the object code for these functions directly from the library and insert them into the executable.
Now if this executable is run it has every thing it needs, so the executable loader just loads it into memory and runs it.
If the library is dynamic the linker will not insert object code but rather it will insert a stub which basically says this function is located in this DLL at this location.
Now if this executable is run, bits of the executable are missing (i.e the stubs) so the loader goes through the executable fixing up the missing stubs. Only after all the stubs have been resolved will the executable be allowed to run.
To see this in action delete or rename the DLL and watch how the loader will report a missing DLL error when you try to run the executable.
Hence the name Dynamic Link Library, parts of the linking process is being done dynamically at run time by the executable loader.
One a final note, if you don't link to the DLL then no stubs will be inserted by the linker, but Windows still provides the GetProcAddress API that allows you to load an execute the DLL function entry point long after the executable has started.
Javascript: How to generate formatted easy-to-read JSON straight from an object?
JSON.stringify takes more optional arguments.
Try:
JSON.stringify({a:1,b:2,c:{d:1,e:[1,2]}}, null, 4); // Indented 4 spaces
JSON.stringify({a:1,b:2,c:{d:1,e:[1,2]}}, null, "\t"); // Indented with tab
From:
How can I beautify JSON programmatically?
Should work in modern browsers, and it is included in json2.js if you need a fallback for browsers that don't support the JSON helper functions. For display purposes, put the output in a <pre> tag to get newlines to show.
LINQ: "contains" and a Lambda query
var depthead = (from s in db.M_Users
join m in db.M_User_Types on s.F_User_Type equals m.UserType_Id
where m.UserType_Name.ToUpper().Trim().Contains("DEPARTMENT HEAD")
select new {s.FullName,s.F_User_Type,s.userId,s.UserCode }
).OrderBy(d => d.userId).ToList();
Model.AvailableDeptHead.Add(new SelectListItem { Text = "Select", Value = "0" });
for (int i = 0; i < depthead.Count; i++)
Model.AvailableDeptHead.Add(new SelectListItem { Text = depthead[i].UserCode + " - " + depthead[i].FullName, Value = Convert.ToString(depthead[i].userId) });
Strip out HTML and Special Characters
Probably better here for a regex replace
// Strip HTML Tags
$clear = strip_tags($des);
// Clean up things like &
$clear = html_entity_decode($clear);
// Strip out any url-encoded stuff
$clear = urldecode($clear);
// Replace non-AlNum characters with space
$clear = preg_replace('/[^A-Za-z0-9]/', ' ', $clear);
// Replace Multiple spaces with single space
$clear = preg_replace('/ +/', ' ', $clear);
// Trim the string of leading/trailing space
$clear = trim($clear);
Or, in one go
$clear = trim(preg_replace('/ +/', ' ', preg_replace('/[^A-Za-z0-9 ]/', ' ', urldecode(html_entity_decode(strip_tags($des))))));
Best practices with STDIN in Ruby?
It seems most answers are assuming the arguments are filenames containing content to be cat'd to the stdin. Below everything is treated as just arguments. If STDIN is from the TTY, then it is ignored.
$ cat tstarg.rb
while a=(ARGV.shift or (!STDIN.tty? and STDIN.gets) )
puts a
end
Either arguments or stdin can be empty or have data.
$ cat numbers
1
2
3
4
5
$ ./tstarg.rb a b c < numbers
a
b
c
1
2
3
4
5
How to create the branch from specific commit in different branch
You have the arguments in the wrong order:
git branch <branch-name> <commit>
and for that, it doesn't matter what branch is checked out; it'll do what you say. (If you omit the commit argument, it defaults to creating a branch at the same place as the current one.)
If you want to check out the new branch as you create it:
git checkout -b <branch> <commit>
with the same behavior if you omit the commit argument.
How to get a date in YYYY-MM-DD format from a TSQL datetime field?
You may also use. This is by using the new datatype DATE. May not work in all previous versions, but greatly simplified to use in later version.
SELECT CAST(getdate() AS DATE)
SELECT LEFT(CAST(getdate() AS DATE), 7)
Why does git say "Pull is not possible because you have unmerged files"?
Steps to follow :
step-1 : git reset --hard HEAD (if you want to reset it to head)
step-2 : git checkout Master
step-3 : git branch -D <branch Name>
(Remote Branch name where you want to get pull)
step-4 : git checkout <branch name>
step-5 : git pull. (now you will not get any
error)
Thanks, Sarbasish
How to use SSH to run a local shell script on a remote machine?
ssh user@hostname ".~/.bashrc;/cd path-to-file/;.filename.sh"
highly recommended to source the environment file(.bashrc/.bashprofile/.profile). before running something in remote host because target and source hosts environment variables may be deffer.
Are HTTP cookies port specific?
In IE 8, cookies (verified only against localhost) are shared between ports. In FF 10, they are not.
I've posted this answer so that readers will have at least one concrete option for testing each scenario.
How to call another controller Action From a controller in Mvc
If anyone is looking at how to do this in .net core I accomplished it by adding the controller in startup
services.AddTransient<MyControllerIwantToInject>();
Then Injecting it into the other controller
public class controllerBeingInjectedInto : ControllerBase
{
private readonly MyControllerIwantToInject _myControllerIwantToInject
public controllerBeingInjectedInto(MyControllerIwantToInject myControllerIwantToInject)
{
_myControllerIwantToInject = myControllerIwantToInject;
}
Then just call it like so _myControllerIwantToInject.MyMethodINeed();
Where does application data file actually stored on android device?
On Android 4.4 KitKat, I found mine in:
/sdcard/Android/data/<app.package.name>
Length of array in function argument
length of an array(type int) with sizeof: sizeof(array)/sizeof(int)
How do I format {{$timestamp}} as MM/DD/YYYY in Postman?
Any future date in JavaScript (postman test uses JavaScript) can be retrieved as:
var dateNow = new Date();
var twoWeeksFutureDate = new Date(dateNow.setDate(dateNow.getDate() + 14)).toISOString();
postman.setEnvironmentVariable("future-date", twoWeeksFutureDate);
HTML 5: Is it <br>, <br/>, or <br />?
If you are using HTML5, then using <br> is the right way to go :)
Change NULL values in Datetime format to empty string
This also works:
REPLACE(ISNULL(CONVERT(DATE, @date), ''), '1900-01-01', '') AS 'Your Date Field'
Reference — What does this symbol mean in PHP?
Type Operators
instanceof is used to determine whether a PHP variable is an instantiated object of a certain class.
<?php
class mclass { }
class sclass { }
$a = new mclass;
var_dump($a instanceof mclass);
var_dump($a instanceof sclass);
The above example will output:
bool(true)
bool(false)
Reason: Above Example $a is a object of the mclass so use only a mclass data not instance of with the sclass
Example with inheritance
<?php
class pclass { }
class childclass extends pclass { }
$a = new childclass;
var_dump($a instanceof childclass);
var_dump($a instanceof pclass);
The above example will output:
bool(true)
bool(true)
Example with Clone
<?php
class cloneable { }
$a = new cloneable;
$b = clone $a;
var_dump($a instanceof cloneable);
var_dump($b instanceof cloneable);
The above example will output:
bool(true)
bool(true)
In CSS what is the difference between "." and "#" when declaring a set of styles?
The # is an id selector. It matches only elements with a matching id. Next style rule will match the element that has an id attribute with a value of "green":
#green {color: green}
See http://www.w3schools.com/css/css_syntax.asp for more information
Angular routerLink does not navigate to the corresponding component
use it like this for mroe info read this topic
<a [routerLink]="['/about']">About this</a>
What is the difference between persist() and merge() in JPA and Hibernate?
This is coming from JPA. In a very simple way:
persist(entity)should be used with totally new entities, to add them to DB (if entity already exists in DB there will be EntityExistsException throw).merge(entity)should be used, to put entity back to persistence context if the entity was detached and was changed.
For loop in Objective-C
The traditional for loop in Objective-C is inherited from standard C and takes the following form:
for (/* Instantiate local variables*/ ; /* Condition to keep looping. */ ; /* End of loop expressions */)
{
// Do something.
}
For example, to print the numbers from 1 to 10, you could use the for loop:
for (int i = 1; i <= 10; i++)
{
NSLog(@"%d", i);
}
On the other hand, the for in loop was introduced in Objective-C 2.0, and is used to loop through objects in a collection, such as an NSArray instance. For example, to loop through a collection of NSString objects in an NSArray and print them all out, you could use the following format.
for (NSString* currentString in myArrayOfStrings)
{
NSLog(@"%@", currentString);
}
This is logically equivilant to the following traditional for loop:
for (int i = 0; i < [myArrayOfStrings count]; i++)
{
NSLog(@"%@", [myArrayOfStrings objectAtIndex:i]);
}
The advantage of using the for in loop is firstly that it's a lot cleaner code to look at. Secondly, the Objective-C compiler can optimize the for in loop so as the code runs faster than doing the same thing with a traditional for loop.
Hope this helps.
Regular expression to validate US phone numbers?
The easiest way to match both
^\([0-9]{3}\)[0-9]{3}-[0-9]{4}$
and
^[0-9]{3}-[0-9]{3}-[0-9]{4}$
is to use alternation ((...|...)): specify them as two mostly-separate options:
^(\([0-9]{3}\)|[0-9]{3}-)[0-9]{3}-[0-9]{4}$
By the way, when Americans put the area code in parentheses, we actually put a space after that; for example, I'd write (123) 123-1234, not (123)123-1234. So you might want to write:
^(\([0-9]{3}\) |[0-9]{3}-)[0-9]{3}-[0-9]{4}$
(Though it's probably best to explicitly demonstrate the format that you expect phone numbers to be in.)
File being used by another process after using File.Create()
I updated your question with the code snippet. After proper indenting, it is immediately clear what the problem is: you use File.Create() but don't close the FileStream that it returns.
Doing it that way is unnecessary, StreamWriter already allows appending to an existing file and creating a new file if it doesn't yet exist. Like this:
string filePath = string.Format(@"{0}\M{1}.dat", ConfigurationManager.AppSettings["DirectoryPath"], costCentre);
using (StreamWriter sw = new StreamWriter(filePath, true)) {
//write my text
}
Which uses this StreamWriter constructor.
Bootstrap datepicker hide after selection
- Simply open the
bootstrap-datepicker.js - find :
var defaults = $.fn.datepicker.defaults - set
autoclose: true
Save and refresh your project and this should do.
check if file exists in php
file_exists checks whether a file exist in the specified path or not.
Syntax:
file_exists ( string $filename )
Returns TRUE if the file or directory specified by filename exists; FALSE otherwise.
$filename = BASE_DIR."images/a/test.jpg";
if (file_exists($filename)){
echo "File exist.";
}else{
echo "File does not exist.";
}
Another alternative method you can use getimagesize(), it will return 0(zero) if file/directory is not available in the specified path.
if (@getimagesize($filename)) {...}
Docker build gives "unable to prepare context: context must be a directory: /Users/tempUser/git/docker/Dockerfile"
It's simple, whenever Docker build is run, docker wants to know, what's the image name, so we need to pass -t : . Now make sure you are in the same directory where you have your Dockerfile and run
docker build -t <image_name>:<version> .
Example
docker build -t my_apache:latest . assuming you are in the same directory as your Dockerfile otherwise pass -f flag and the Dockerfile.
docker build -t my_apache:latest -f ~/Users/documents/myapache/Dockerfile
Barcode scanner for mobile phone for Website in form
Check out https://github.com/serratus/quaggaJS
"QuaggaJS is a barcode-scanner entirely written in JavaScript supporting real- time localization and decoding of various types of barcodes such as EAN, CODE 128, CODE 39, EAN 8, UPC-A, UPC-C, I2of5, 2of5, CODE 93 and CODABAR. The library is also capable of using getUserMedia to get direct access to the user's camera stream. Although the code relies on heavy image-processing even recent smartphones are capable of locating and decoding barcodes in real-time."
How to describe table in SQL Server 2008?
According to this documentation:
DESC MY_TABLE
is equivalent to
SELECT column_name "Name", nullable "Null?", concat(concat(concat(data_type,'('),data_length),')') "Type" FROM user_tab_columns WHERE table_name='TABLE_NAME_TO_DESCRIBE';
I've roughly translated that to the SQL Server equivalent for you - just make sure you're running it on the EX database.
SELECT column_name AS [name],
IS_NULLABLE AS [null?],
DATA_TYPE + COALESCE('(' + CASE WHEN CHARACTER_MAXIMUM_LENGTH = -1
THEN 'Max'
ELSE CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR(5))
END + ')', '') AS [type]
FROM INFORMATION_SCHEMA.Columns
WHERE table_name = 'EMP_MAST'
How to resize the jQuery DatePicker control
$('.ui-datepicker').css('font-size', $('.ui-datepicker').width() / 20 + 'px');
How to kill an Android activity when leaving it so that it cannot be accessed from the back button?
you can use:
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
Border Radius of Table is not working
Just add overflow:hidden to the table with border-radius.
.tablewithradius {
overflow:hidden ;
border-radius: 15px;
}
How to set a default value with Html.TextBoxFor?
this worked for me , in this way we setting the default value to empty string
@Html.TextBoxFor(m => m.Id, new { @Value = "" })
When to use the different log levels
I've always considered warning the first log level that for sure means there is a problem (for example, perhaps a config file isn't where it should be and we're going to have to run with default settings). An error implies, to me, something that means the main goal of the software is now impossible and we're going to try to shut down cleanly.
ASP.NET Web API - PUT & DELETE Verbs Not Allowed - IIS 8
Okay. I finally got to the bottom of this. You need to jump through some hoops to get the PUT and DELETE verbs working correctly with IIS8. In fact if you install the release candidate of VS 2012 and create a new WEB API project you'll find that the sample PUT and DELETE methods return 404 errors out of the box.
To use the PUT and DELETE verbs with the Web API you need to edit %userprofile%\documents\iisexpress\config\applicationhost.config and add the verbs to the ExtensionlessUrl handler as follows:
Change this line:
<add name="ExtensionlessUrl-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
to:
<add name="ExtensionlessUrl-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
In addition to the above you should ensure WebDAV is not interfering with your requests. This can be done by commenting out the following lines from applicationhost.config.
<add name="WebDAVModule" image="%IIS_BIN%\webdav.dll" />
<add name="WebDAVModule" />
<add name="WebDAV" path="*" verb="PROPFIND,PROPPATCH,MKCOL,PUT,COPY,DELETE,MOVE,LOCK,UNLOCK" modules="WebDAVModule" resourceType="Unspecified" requireAccess="None" />
Also be aware that the default Web API convention is that your method name should be the same as the invoked HTTP verb. For example if you're sending an HTTP delete request your method, by default, should be named Delete.
Where is the Keytool application?
It is in path/to/jdk/bin. Make sure that $JAVA_HOME is defined, and $JAVA_HOME/bin is added to $PATH, or else the 'keytool' command won't be recognized when called.
Python Finding Prime Factors
This is my python code: it has a fast check for primes and checks from highest to lowest the prime factors. You have to stop if no new numbers came out. (Any ideas on this?)
import math
def is_prime_v3(n):
""" Return 'true' if n is a prime number, 'False' otherwise """
if n == 1:
return False
if n > 2 and n % 2 == 0:
return False
max_divisor = math.floor(math.sqrt(n))
for d in range(3, 1 + max_divisor, 2):
if n % d == 0:
return False
return True
number = <Number>
for i in range(1,math.floor(number/2)):
if is_prime_v3(i):
if number % i == 0:
print("Found: {} with factor {}".format(number / i, i))
The answer for the initial question arrives in a fraction of a second.
Access Https Rest Service using Spring RestTemplate
One point from me. I used a mutual cert authentication with spring-boot microservices. The following is working for me, key points here are
keyManagerFactory.init(...) and sslcontext.init(keyManagerFactory.getKeyManagers(), null, new SecureRandom()) lines of code without them, at least for me, things did not work. Certificates are packaged by PKCS12.
@Value("${server.ssl.key-store-password}")
private String keyStorePassword;
@Value("${server.ssl.key-store-type}")
private String keyStoreType;
@Value("${server.ssl.key-store}")
private Resource resource;
private RestTemplate getRestTemplate() throws Exception {
return new RestTemplate(clientHttpRequestFactory());
}
private ClientHttpRequestFactory clientHttpRequestFactory() throws Exception {
return new HttpComponentsClientHttpRequestFactory(httpClient());
}
private HttpClient httpClient() throws Exception {
KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance("SunX509");
KeyStore trustStore = KeyStore.getInstance(keyStoreType);
if (resource.exists()) {
InputStream inputStream = resource.getInputStream();
try {
if (inputStream != null) {
trustStore.load(inputStream, keyStorePassword.toCharArray());
keyManagerFactory.init(trustStore, keyStorePassword.toCharArray());
}
} finally {
if (inputStream != null) {
inputStream.close();
}
}
} else {
throw new RuntimeException("Cannot find resource: " + resource.getFilename());
}
SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()).build();
sslcontext.init(keyManagerFactory.getKeyManagers(), null, new SecureRandom());
SSLConnectionSocketFactory sslConnectionSocketFactory =
new SSLConnectionSocketFactory(sslcontext, new String[]{"TLSv1.2"}, null, getDefaultHostnameVerifier());
return HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory).build();
}
Allow a div to cover the whole page instead of the area within the container
please try with setting margin and padding to 0 on body.
<body style="margin: 0 0 0 0; padding: 0 0 0 0;">
How do I download code using SVN/Tortoise from Google Code?
If you have Tortoise SVN, like I do, take the google link, and ONLY copy the URL.
Regular- (svn checkout http://wittytwitter.googlecode.com/svn/trunk/ wittytwitter-read-only)
Modified to URL- (http://wittytwitter.googlecode.com/svn/trunk/ wittytwitter)
Create a folder, right click the empty space. You can Browse Repo or just download it all via checkout.
I don't know whether you have to be a Google member or not, but I signed up just in case. Have fun with the code.
Misanthropy
Uncaught TypeError: .indexOf is not a function
I was getting e.data.indexOf is not a function error, after debugging it, I found that it was actually a TypeError, which meant, indexOf() being a function is applicable to strings, so I typecasted the data like the following and then used the indexOf() method to make it work
e.data.toString().indexOf('<stringToBeMatchedToPosition>')
Not sure if my answer was accurate to the question, but yes shared my opinion as i faced a similar kind of situation.
Why do we use web.xml?
It's the default configuration for a Java web application; it's required.
WicketFilter
is applied to every HTTP request that's sent to this web app.
How do I install Java on Mac OSX allowing version switching?
This is how I did it.
Step 1: Install Java 11
You can download Java 11 dmg for mac from here: https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html
Step 2: After installation of Java 11. Confirm installation of all versions. Type the following command in your terminal.
/usr/libexec/java_home -V
Step 3: Edit .bash_profile
sudo nano ~/.bash_profile
Step 4: Add 11.0.1 as default. (Add below line to bash_profile file).
export JAVA_HOME=$(/usr/libexec/java_home -v 11.0.1)
to switch to any version
export JAVA_HOME=$(/usr/libexec/java_home -v X.X.X)
Now Press CTRL+X to exit the bash. Press 'Y' to save changes.
Step 5: Reload bash_profile
source ~/.bash_profile
Step 6: Confirm current version of Java
java -version
How to set fake GPS location on IOS real device
When running in debug mode you can use the little arrow button in the debug area (Shift+Cmd+Y) in Xcode to specify a location. There are some presets or you can also add a GPX file.
You can generate GPX files here manually: http://www.bikehike.co.uk/mapview.php (from answer: https://stackoverflow.com/a/17478860/881197)
iOS - Build fails with CocoaPods cannot find header files
This was the answer for me, I updated cocoapods and I think that made the PODS_HEADERS_SEARCH_PATHS go away. My solution was similar to this but I used "$(PODS_ROOT)/Headers" – Andrew Aitken
Thank you so much for this answer. I had a hard time looking for ways to fix my problem. Thank you very much.
PHP decoding and encoding json with unicode characters
$json = array('tag' => 'Odómetro'); // Original array
$json = json_encode($json); // {"Tag":"Od\u00f3metro"}
$json = json_decode($json); // Od\u00f3metro becomes Odómetro
echo $json->{'tag'}; // Odómetro
echo utf8_decode($json->{'tag'}); // Odómetro
You were close, just use utf8_decode.
Conveniently map between enum and int / String
A very clean usage example of reverse Enum
Step 1
Define an interface EnumConverter
public interface EnumConverter <E extends Enum<E> & EnumConverter<E>> {
public String convert();
E convert(String pKey);
}
Step 2
Create a class name ReverseEnumMap
import java.util.HashMap;
import java.util.Map;
public class ReverseEnumMap<V extends Enum<V> & EnumConverter<V>> {
private Map<String, V> map = new HashMap<String, V>();
public ReverseEnumMap(Class<V> valueType) {
for (V v : valueType.getEnumConstants()) {
map.put(v.convert(), v);
}
}
public V get(String pKey) {
return map.get(pKey);
}
}
Step 3
Go to you Enum class and implement it with EnumConverter<ContentType> and of course override interface methods. You also need to initialize a static ReverseEnumMap.
public enum ContentType implements EnumConverter<ContentType> {
VIDEO("Video"), GAME("Game"), TEST("Test"), IMAGE("Image");
private static ReverseEnumMap<ContentType> map = new ReverseEnumMap<ContentType>(ContentType.class);
private final String mName;
ContentType(String pName) {
this.mName = pName;
}
String value() {
return this.mName;
}
@Override
public String convert() {
return this.mName;
}
@Override
public ContentType convert(String pKey) {
return map.get(pKey);
}
}
Step 4
Now create a Communication class file and call it's new method to convert an Enum to String and String to Enum. I have just put main method for explanation purpose.
public class Communication<E extends Enum<E> & EnumConverter<E>> {
private final E enumSample;
public Communication(E enumSample) {
this.enumSample = enumSample;
}
public String resolveEnumToStringValue(E e) {
return e.convert();
}
public E resolveStringEnumConstant(String pName) {
return enumSample.convert(pName);
}
//Should not put main method here... just for explanation purpose.
public static void main(String... are) {
Communication<ContentType> comm = new Communication<ContentType>(ContentType.GAME);
comm.resolveEnumToStringValue(ContentType.GAME); //return Game
comm.resolveStringEnumConstant("Game"); //return GAME (Enum)
}
}
How to get attribute of element from Selenium?
As the recent developed Web Applications are using JavaScript, jQuery, AngularJS, ReactJS etc there is a possibility that to retrieve an attribute of an element through Selenium you have to induce WebDriverWait to synchronize the WebDriver instance with the lagging Web Client i.e. the Web Browser before trying to retrieve any of the attributes.
Some examples:
Python:
To retrieve any attribute form a visible element (e.g.
<h1>tag) you need to use the expected_conditions asvisibility_of_element_located(locator)as follows:attribute_value = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.ID, "org"))).get_attribute("attribute_name")To retrieve any attribute form an interactive element (e.g.
<input>tag) you need to use the expected_conditions aselement_to_be_clickable(locator)as follows:attribute_value = WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.ID, "org"))).get_attribute("attribute_name")
HTML Attributes
Below is a list of some attributes often used in HTML
Note: A complete list of all attributes for each HTML element, is listed in: HTML Attribute Reference
replace special characters in a string python
You need to call replace on z and not on str, since you want to replace characters located in the string variable z
removeSpecialChars = z.replace("!@#$%^&*()[]{};:,./<>?\|`~-=_+", " ")
But this will not work, as replace looks for a substring, you will most likely need to use regular expression module re with the sub function:
import re
removeSpecialChars = re.sub("[!@#$%^&*()[]{};:,./<>?\|`~-=_+]", " ", z)
Don't forget the [], which indicates that this is a set of characters to be replaced.
Git ignore file for Xcode projects
For Xcode 5 I add:
####
# Xcode 5 - VCS metadata
#
*.xccheckout
From Berik's Answer
How can I simulate an array variable in MySQL?
Have you tried using PHP's serialize()? That allows you to store the contents of a variable's array in a string PHP understands and is safe for the database (assuming you've escaped it first).
$array = array(
1 => 'some data',
2 => 'some more'
);
//Assuming you're already connected to the database
$sql = sprintf("INSERT INTO `yourTable` (`rowID`, `rowContent`) VALUES (NULL, '%s')"
, serialize(mysql_real_escape_string($array, $dbConnection)));
mysql_query($sql, $dbConnection) or die(mysql_error());
You can also do the exact same without a numbered array
$array2 = array(
'something' => 'something else'
);
or
$array3 = array(
'somethingNew'
);
Regex allow a string to only contain numbers 0 - 9 and limit length to 45
^[0-9]{1,45}$ is correct.
How to fit a smooth curve to my data in R?
LOESS is a very good approach, as Dirk said.
Another option is using Bezier splines, which may in some cases work better than LOESS if you don't have many data points.
Here you'll find an example: http://rosettacode.org/wiki/Cubic_bezier_curves#R
# x, y: the x and y coordinates of the hull points
# n: the number of points in the curve.
bezierCurve <- function(x, y, n=10)
{
outx <- NULL
outy <- NULL
i <- 1
for (t in seq(0, 1, length.out=n))
{
b <- bez(x, y, t)
outx[i] <- b$x
outy[i] <- b$y
i <- i+1
}
return (list(x=outx, y=outy))
}
bez <- function(x, y, t)
{
outx <- 0
outy <- 0
n <- length(x)-1
for (i in 0:n)
{
outx <- outx + choose(n, i)*((1-t)^(n-i))*t^i*x[i+1]
outy <- outy + choose(n, i)*((1-t)^(n-i))*t^i*y[i+1]
}
return (list(x=outx, y=outy))
}
# Example usage
x <- c(4,6,4,5,6,7)
y <- 1:6
plot(x, y, "o", pch=20)
points(bezierCurve(x,y,20), type="l", col="red")
Unstaged changes left after git reset --hard
Possible Cause #1 - Line Ending Normalization
One situation in which this can happen is when the file in question was checked into the repository without the correct configuration for line endings (1) resulting in a file in the repository with either the incorrect line endings, or mixed line endings. To confirm, verify that git diff shows only changes in line endings (these may not be visible by default, try git diff | cat -v to see carriage returns as literal ^M characters).
Subsequently, someone probably added a .gitattributes or modified the core.autocrlf setting to normalize line endings (2). Based on the .gitattributes or global config, Git has applied local changes to your working copy that apply the line ending normalization requested. Unfortunately, for some reason git reset --hard does not undo these line normalization changes.
Solution
Workarounds in which the local line endings are reset will not solve the problem. Every time the file is "seen" by git, it will try and reapply the normalization, resulting in the same issue.
The best option is to let git apply the normalization it wants to by normalizing all the line endings in the repo to match the .gitattributes, and committing those changes -- see Trying to fix line-endings with git filter-branch, but having no luck.
If you really want to try and revert the changes to the file manually then the easiest solution seems to be to erase the modified files, and then to tell git to restore them, although I note this solution does not seem to work consistently 100% of the time (WARNING: DO NOT run this if your modified files have changes other than line endings!!):
git status --porcelain | grep "^ M" | cut -c4- | xargs rm
git checkout -- .
Note that, unless you do normalize the line endings in the repository at some point, you will keep running into this issue.
Possible Cause #2 - Case Insensitivity
The second possible cause is case insensitivity on Windows or Mac OS/X. For example, say a path like the following exists in the repository:
/foo/bar
Now someone on Linux commits files into /foo/Bar (probably due to a build tool or something that created that directory) and pushes. On Linux, this is actually now two separate directories:
/foo/bar/fileA
/foo/Bar/fileA
Checking this repo out on Windows or Mac may result in modified fileA that cannot be reset, because on each reset, git on Windows checks out /foo/bar/fileA, and then because Windows is case insensitive, overwrites the content of fileA with /foo/Bar/fileA, resulting in them being "modified".
Another case may be an individual file(s) that exists in the repo, which when checked out on a case insensitive filesystem, would overlap. For example:
/foo/bar/fileA
/foo/bar/filea
There may be other similar situations that could cause such problems.
git on case insensitive filesystems should really detect this situation and show a useful warning message, but it currently does not (this may change in the future -- see this discussion and related proposed patches on the git.git mailing list).
Solution
The solution is to bring the case of files in the git index and the case on the Windows filesystem into alignment. This can either be done on Linux which will show the true state of things, OR on Windows with very useful open source utility Git-Unite. Git-Unite will apply the necessary case changes to the git index, which can then be committed to the repo.
(1) This was most likely by someone using Windows, without any .gitattributes definition for the file in question, and using the default global setting for core.autocrlf which is false (see (2)).
(2) http://adaptivepatchwork.com/2012/03/01/mind-the-end-of-your-line/
Difference between Node object and Element object?
Node : http://www.w3schools.com/js/js_htmldom_nodes.asp
The Node object represents a single node in the document tree. A node can be an element node, an attribute node, a text node, or any other of the node types explained in the Node Types chapter.
Element : http://www.w3schools.com/js/js_htmldom_elements.asp
The Element object represents an element in an XML document. Elements may contain attributes, other elements, or text. If an element contains text, the text is represented in a text-node.
duplicate :
Export P7b file with all the certificate chain into CER file
The only problem is that any additional certificates in resulted file will not be recognized, as tools don't expect more than one certificate per PEM/DER encoded file. Even openssl itself. Try
openssl x509 -outform DER -in certificate.cer | openssl x509 -inform DER -outform PEM
and see for yourself.
How to add spacing between UITableViewCell
If you don't want to change the section and row number of your table view (like I did), here's what you do:
1) Add an ImageView to the bottom of your table cell view.
2) Make it the same colour as the background colour of the table view.
I've done this in my application and it works perfectly. Cheers! :D
Java Desktop application: SWT vs. Swing
Pros Swing:
- part of java library, no need for additional native libraries
- works the same way on all platforms
- Integrated GUI Editor in Netbeans and Eclipse
- good online tutorials by Sun/Oracle
- Supported by official java extensions (like java OpenGL)
Cons Swing:
- Native look and feel may behave different from the real native system.
- heavy components (native/awt) hide swing components, not a problem most of the time as as use of heavy components is rather rare
Pros SWT:
- uses native elements when possible, so always native behavior
- supported by eclipse, gui editor VEP (VEP also supports Swing and AWT)
- large number of examples online
- has an integrated awt/swt bridge to allow use of awt and swing components
Cons SWT:
- requires native libraries for each supported system
- may not support every behavior on all systems because of native resources used (hint options)
- managing native resources, while native components will often be disposed with their parent other resources such as Fonts have to be manually released or registered as dispose listener to a component for automatic release.
List all files and directories in a directory + subdirectories
Use the GetDirectories and GetFiles methods to get the folders and files.
Use the SearchOption AllDirectories to get the folders and files in the subfolders also.
Send attachments with PHP Mail()?
To send an email with attachment we need to use the multipart/mixed MIME type that specifies that mixed types will be included in the email. Moreover, we want to use multipart/alternative MIME type to send both plain-text and HTML version of the email.Have a look at the example:
<?php
//define the receiver of the email
$to = '[email protected]';
//define the subject of the email
$subject = 'Test email with attachment';
//create a boundary string. It must be unique
//so we use the MD5 algorithm to generate a random hash
$random_hash = md5(date('r', time()));
//define the headers we want passed. Note that they are separated with \r\n
$headers = "From: [email protected]\r\nReply-To: [email protected]";
//add boundary string and mime type specification
$headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-".$random_hash."\"";
//read the atachment file contents into a string,
//encode it with MIME base64,
//and split it into smaller chunks
$attachment = chunk_split(base64_encode(file_get_contents('attachment.zip')));
//define the body of the message.
ob_start(); //Turn on output buffering
?>
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: multipart/alternative; boundary="PHP-alt-<?php echo $random_hash; ?>"
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Hello World!!!
This is simple text email message.
--PHP-alt-<?php echo $random_hash; ?>
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
<h2>Hello World!</h2>
<p>This is something with <b>HTML</b> formatting.</p>
--PHP-alt-<?php echo $random_hash; ?>--
--PHP-mixed-<?php echo $random_hash; ?>
Content-Type: application/zip; name="attachment.zip"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
<?php echo $attachment; ?>
--PHP-mixed-<?php echo $random_hash; ?>--
<?php
//copy current buffer contents into $message variable and delete current output buffer
$message = ob_get_clean();
//send the email
$mail_sent = @mail( $to, $subject, $message, $headers );
//if the message is sent successfully print "Mail sent". Otherwise print "Mail failed"
echo $mail_sent ? "Mail sent" : "Mail failed";
?>
As you can see, sending an email with attachment is easy to accomplish. In the preceding example we have multipart/mixed MIME type, and inside it we have multipart/alternative MIME type that specifies two versions of the email. To include an attachment to our message, we read the data from the specified file into a string, encode it with base64, split it in smaller chunks to make sure that it matches the MIME specifications and then include it as an attachment.
Taken from here.
m2eclipse error
I would add some points that helped me to solve this problem :
- When all other missing archetypes have been indeed installed into your local repository, and the only remaining and abnormally sticking error is this (damned ..) one, whereas the maven-filtering-x.jar is present in his directory, the problem could finally only be solved by creating a new work space as was suggested by Dan in his response ( http://mail-archives.apache.org/mod_mbox/incubator-isis-dev/201112.mbox/%3CCALJOYLFfSJ5Xc_z7a7N+S2_kabuVv0ykv7A5afQaJJOb99iCdg@mail.gmail.com%3E ) (thanks).
Having the local repository OK, on the other hand, turned out to be quite costly, as many archetypes would not get loaded, due apparently to timeouts of m2eclipse and very unstable communication speeds in my case.
In many cases only the error file could be found in the folder ex : xxx.jar.lastUpdated, instead of the jar or pom file. I had always to suppress this file to permit a new download.
Also really worthy were :
as already said, using the mvn clean install from the command line, apparently much more patient than m2eclipse, and also efficient and verbose, at least for the time being.
(and also the Update Project of the Maven menu)
downloading using the dependency:get goal
mvn org.apache.maven.plugins:maven-dependency-plugin:2.1:get -DrepoUrl=url -Dartifact=groupId:artifactId:version1
(from within the project folder) (hint given in another thread, thanks also).
also downloading and installing manually (.jar+.sha1), from in particular, "m2proxy atlassian" .
adding other repositories in the pom.xml itself (the settings.xml mirror configuration did'nt do the job, I don't know yet why). Ex : nexus/content/repositories/releases/ et nexus/content/repositories/releases/, sous repository.jboss.org, ou download.java.net/maven/2 .
To finish, in any case, a lot of time (!..) could have been et could certainly still be spared with a light tool repairing thoroughly the local repository straightaway. I could not yet find it. Actually it should even be normally a mvn command ("--repair-local-repository").
How to generate a random alpha-numeric string
public static String randomSeriesForThreeCharacter() {
Random r = new Random();
String value = "";
char random_Char ;
for(int i=0; i<10; i++)
{
random_Char = (char) (48 + r.nextInt(74));
value = value + random_char;
}
return value;
}
How to convert an int array to String with toString method in Java
You can use java.util.Arrays:
String res = Arrays.toString(array);
System.out.println(res);
Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
MSBuild doesn't copy references (DLL files) if using project dependencies in solution
I had the same problem and the dll was a dynamically loaded reference. To solve the problem I have added an "using" with the namespace of the dll. Now the dll is copied in the output folder.
Simple 'if' or logic statement in Python
If key isn't an int or float but a string, you need to convert it to an int first by doing
key = int(key)
or to a float by doing
key = float(key)
Otherwise, what you have in your question should work, but
if (key < 1) or (key > 34):
or
if not (1 <= key <= 34):
would be a bit clearer.
What is SYSNAME data type in SQL Server?
Is there use case you can provide?
Anywhere you want to store an object name for use by database maintenance scripts. For example, a script purges old rows from certain tables that have a date column. It's configured with a table that gives table name, column name to filter on, and how many days of history to keep. Another script dumps certain tables to CSV files, and again is configured with a table listing the tables to dump. These configuration tables can use the sysname type to store table and column names.
Responsive css styles on mobile devices ONLY
Yes, this can be done via javascript feature detection ( or browser detection , e.g. Modernizr ) . Then, use yepnope.js to load required resources ( JS and/or CSS )
How do I select a sibling element using jQuery?
If you want to select a specific sibling:
var $sibling = $(this).siblings('.bidbutton')[index];
where 'index' is the index of the specific sibling within the parent container.
Jackson serialization: ignore empty values (or null)
I was having similar problem recently with version 2.6.6.
@JsonInclude(JsonInclude.Include.NON_NULL)
Using above annotation either on filed or class level was not working as expected. The POJO was mutable where I was applying the annotation. When I changed the behaviour of the POJO to be immutable the annotation worked its magic.
I am not sure if its down to new version or previous versions of this lib had similar behaviour but for 2.6.6 certainly you need to have Immutable POJO for the annotation to work.
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
Above option mentioned in various answers of setting serialisation inclusion in ObjectMapper directly at global level works as well but, I prefer controlling it at class or filed level.
So if you wanted all the null fields to be ignored while JSON serialisation then use the annotation at class level but if you want only few fields to ignored in a class then use it over those specific fields. This way its more readable & easy for maintenance if you wanted to change behaviour for specific response.
Export table data from one SQL Server to another
It can be done through "Import/Export Data..." in SQL Server Management Studio
How to get cookie's expire time
It seems there's a list of all cookies sent to browser in array returned by php's headers_list() which among other data returns "Set-Cookie" elements as follows:
Set-Cookie: cooke_name=cookie_value; expires=expiration_time; Max-Age=age; path=path; domain=domain
This way you can also get deleted ones since their value is deleted:
Set-Cookie: cooke_name=deleted; expires=expiration_time; Max-Age=age; path=path; domain=domain
From there on it's easy to retrieve expiration time or age for particular cookie. Keep in mind though that this array is probably available only AFTER actual call to setcookie() has been made so it's valid for script that has already finished it's job. I haven't tested this in some other way(s) since this worked just fine for me.
This is rather old topic and I'm not sure if this is valid for all php builds but I thought it might be helpfull.
For more info see:
https://www.php.net/manual/en/function.headers-list.php
https://www.php.net/manual/en/function.headers-sent.php
What is the difference between Amazon SNS and Amazon SQS?
Here's a comparison of the two:
Entity Type
- SQS: Queue (Similar to JMS)
- SNS: Topic (Pub/Sub system)
Message consumption
- SQS: Pull Mechanism - Consumers poll and pull messages from SQS
- SNS: Push Mechanism - SNS Pushes messages to consumers
Use Case
- SQS: Decoupling two applications and allowing parallel asynchronous processing
- SNS: Fanout - Processing the same message in multiple ways
Persistence
- SQS: Messages are persisted for some (configurable) duration if no consumer is available (maximum two weeks), so the consumer does not have to be up when messages are added to queue.
- SNS: No persistence. Whichever consumer is present at the time of message arrival gets the message and the message is deleted. If no consumers are available then the message is lost after a few retries.
Consumer Type
- SQS: All the consumers are typically identical and hence process the messages in the exact same way (each message is processed once by one consumer, though in rare cases messages may be resent)
- SNS: The consumers might process the messages in different ways
Sample applications
- SQS: Jobs framework: The Jobs are submitted to SQS and the consumers at the other end can process the jobs asynchronously. If the job frequency increases, the number of consumers can simply be increased to achieve better throughput.
- SNS: Image processing. If someone uploads an image to S3 then watermark that image, create a thumbnail and also send a Thank You email. In that case S3 can publish notifications to an SNS topic with three consumers listening to it. The first one watermarks the image, the second one creates a thumbnail and the third one sends a Thank You email. All of them receive the same message (image URL) and do their processing in parallel.
How do I rotate the Android emulator display?
Device Start-up Configuration -- Via the GUI
To start-up the device in Landscape mode, modifications be made in the Android Virtual Device (AVD) Manager. Open the Virtual Device Manager, and click the Edit pencil:
Then, under Startup size and orientation, select Landscape:
.. and click Finish.
Device Start-up Configuration -- Via the config file
Despite the seemingly easy way to configure this, in practice this didn't work for me. So there's a way to edit the device's configuration file instead to force it to start-up in Landscape mode.
It involves manually switching the width and height in the hardware-qemui.ini file.
To do so, open this file for edit in a text editor:
C:\Users\<user>\.android\avd\<deviceName>.avd\hardware-qemu.ini
Switch the values of the width and height, so that the width is longer than the height:
hw.lcd.width = 800
hw.lcd.height = 480
The AVD now boots in Landscape mode. The orientation may still be changed with shortcut keys.
how to specify new environment location for conda create
If you want to use the --prefix or -p arguments, but want to avoid having to use the environment's full path to activate it, you need to edit the .condarc config file before you create the environment.
The .condarc file is in the home directory; C:\Users\<user> on Windows. Edit the values under the envs_dirs key to include the custom path for your environment. Assuming the custom path is D:\envs, the file should end up looking something like this:
ssl_verify: true
channels:
- defaults
envs_dirs:
- C:\Users\<user>\Anaconda3\envs
- D:\envs
Then, when you create a new environment on that path, its name will appear along with the path when you run conda env list, and you should be able to activate it using only the name, and not the full path.
In summary, if you edit .condarc to include D:\envs, and then run conda env create -p D:\envs\myenv python=x.x, then activate myenv (or source activate myenv on Linux) should work.
Hope that helps!
P.S. I stumbled upon this through trial and error. I think what happens is when you edit the envs_dirs key, conda updates ~\.conda\environments.txt to include the environments found in all the directories specified under the envs_dirs, so they can be accessed without using absolute paths.
Sockets: Discover port availability using Java
This is the implementation coming from the Apache camel project:
/**
* Checks to see if a specific port is available.
*
* @param port the port to check for availability
*/
public static boolean available(int port) {
if (port < MIN_PORT_NUMBER || port > MAX_PORT_NUMBER) {
throw new IllegalArgumentException("Invalid start port: " + port);
}
ServerSocket ss = null;
DatagramSocket ds = null;
try {
ss = new ServerSocket(port);
ss.setReuseAddress(true);
ds = new DatagramSocket(port);
ds.setReuseAddress(true);
return true;
} catch (IOException e) {
} finally {
if (ds != null) {
ds.close();
}
if (ss != null) {
try {
ss.close();
} catch (IOException e) {
/* should not be thrown */
}
}
}
return false;
}
They are checking the DatagramSocket as well to check if the port is avaliable in UDP and TCP.
Hope this helps.
What does the "assert" keyword do?
Although I have read a lot documentation about this one, I'm still confusing on how, when, and where to use it.
Make it very simple to understand:
When you have a similar situation like this:
String strA = null;
String strB = null;
if (2 > 1){
strA = "Hello World";
}
strB = strA.toLowerCase();
You might receive warning (displaying yellow line on strB = strA.toLowerCase(); ) that strA might produce a NULL value to strB. Although you know that strB is absolutely won't be null in the end, just in case, you use assert to
1. Disable the warning.
2. Throw Exception error IF worst thing happens (when you run your application).
Sometime, when you compile your code, you don't get your result and it's a bug. But the application won't crash, and you spend a very hard time to find where is causing this bug.
So, if you put assert, like this:
assert strA != null; //Adding here
strB = strA .toLowerCase();
you tell the compiler that strA is absolutely not a null value, it can 'peacefully' turn off the warning. IF it is NULL (worst case happens), it will stop the application and throw a bug to you to locate it.
Reset push notification settings for app
I agree with micmdk.. I had a development environment setup with Push Notifications and needed a way to reset my phone to look like an initial install… and only these precise steps worked for me… requires TWO reboots of Device:
From APPLE TECH DOC:
Resetting the Push Notifications Permissions Alert on iOS The first time a push-enabled app registers for push notifications, iOS asks the user if they wish to receive notifications for that app. Once the user has responded to this alert it is not presented again unless the device is restored or the app has been uninstalled for at least a day.
If you want to simulate a first-time run of your app, you can leave the app uninstalled for a day. You can achieve the latter without actually waiting a day by following these steps:
Delete your app from the device.
Turn the device off completely and turn it back on.
Go to Settings > General > Date & Time and set the date ahead a day or more.
Turn the device off completely again and turn it back on.
Squash my last X commits together using Git
In question it could be ambiguous what is meant by "last".
for example git log --graph outputs the following (simplified):
* commit H0
|
* merge
|\
| * commit B0
| |
| * commit B1
| |
* | commit H1
| |
* | commit H2
|/
|
Then last commits by time are H0, merge, B0. To squash them you will have to rebase your merged branch on commit H1.
The problem is that H0 contains H1 and H2 (and generally more commits before merge and after branching) while B0 don't. So you have to manage changes from H0, merge, H1, H2, B0 at least.
It's possible to use rebase but in different manner then in others mentioned answers:
rebase -i HEAD~2
This will show you choice options (as mentioned in other answers):
pick B1
pick B0
pick H0
Put squash instead of pick to H0:
pick B1
pick B0
s H0
After save and exit rebase will apply commits in turn after H1. That means that it will ask you to resolve conflicts again (where HEAD will be H1 at first and then accumulating commits as they are applied).
After rebase will finish you can choose message for squashed H0 and B0:
* commit squashed H0 and B0
|
* commit B1
|
* commit H1
|
* commit H2
|
P.S. If you just do some reset to BO:
(for example, using reset --mixed that is explained in more detail here https://stackoverflow.com/a/18690845/2405850):
git reset --mixed hash_of_commit_B0
git add .
git commit -m 'some commit message'
then you squash into B0 changes of H0, H1, H2 (losing completely commits for changes after branching and before merge.
GridView sorting: SortDirection always Ascending
Using SecretSquirrel's solution above
here is my full working, production code. Just change dgvCoaches to your grid view name.
... during the binding of the grid
dgvCoaches.DataSource = dsCoaches.Tables[0];
ViewState["AllCoaches"] = dsCoaches.Tables[0];
dgvCoaches.DataBind();
and now the sorting
protected void gridView_Sorting(object sender, GridViewSortEventArgs e)
{
DataTable dt = ViewState["AllCoaches"] as DataTable;
if (dt != null)
{
if (e.SortExpression == (string)ViewState["SortColumn"])
{
// We are resorting the same column, so flip the sort direction
e.SortDirection =
((SortDirection)ViewState["SortColumnDirection"] == SortDirection.Ascending) ?
SortDirection.Descending : SortDirection.Ascending;
}
// Apply the sort
dt.DefaultView.Sort = e.SortExpression +
(string)((e.SortDirection == SortDirection.Ascending) ? " ASC" : " DESC");
ViewState["SortColumn"] = e.SortExpression;
ViewState["SortColumnDirection"] = e.SortDirection;
dgvCoaches.DataSource = dt;
dgvCoaches.DataBind();
}
}
and here is the aspx code:
<asp:GridView ID="dgvCoaches" runat="server"
CssClass="table table-hover table-striped" GridLines="None" DataKeyNames="HealthCoachID" OnRowCommand="dgvCoaches_RowCommand"
AutoGenerateColumns="False" OnSorting="gridView_Sorting" AllowSorting="true">
<Columns>
<asp:BoundField DataField="HealthCoachID" Visible="false" />
<asp:BoundField DataField="LastName" HeaderText="Last Name" SortExpression="LastName" />
<asp:BoundField DataField="FirstName" HeaderText="First Name" SortExpression="FirstName" />
<asp:BoundField DataField="LoginName" HeaderText="Login Name" SortExpression="LoginName" />
<asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" HtmlEncode="false" DataFormatString="<a href=mailto:{0}>{0}</a>" />
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton runat="server" BorderStyle="None" CssClass="btn btn-default" Text="<i class='glyphicon glyphicon-edit'></i>" CommandName="Update" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton runat="server" OnClientClick="return ConfirmOnDelete();" BorderStyle="None" CssClass="btn btn-default" Text="<i class='glyphicon glyphicon-remove'></i>" CommandName="Delete" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle CssClass="cursor-pointer" />
</asp:GridView>
How to convert a string to lower or upper case in Ruby
Won't work for every, but this just saved me a bunch of time. I just had the problem with a CSV returning "TRUE or "FALSE" so I just added VALUE.to_s.downcase == "true" which will return the boolean true if the value is "TRUE" and false if the value is "FALSE", but will still work for the boolean true and false.
What causes signal 'SIGILL'?
It means the CPU attempted to execute an instruction it didn't understand. This could be caused by corruption I guess, or maybe it's been compiled for the wrong architecture (in which case I would have thought the O/S would refuse to run the executable). Not entirely sure what the root issue is.
Netbeans - Error: Could not find or load main class
This condition happens to me every 6-months or so. I think it happens when closing NetBeans under very low memory conditions. I discovered that it could be easily corrected by (1) Rename your project, including its folder name using right-click on project explorer's project name---I put a simple suffix on the original name ("_damaged"). (2) Try BUILD. If that is successful, which it is for me, give three cheers. (3) Repeat step (1) to restore the original project name. BUILD and RUN should start without trouble. I guess that the 'rename the project and folder' process causes a special rediscovery of the applications main location.
jQuery Validate Plugin - Trigger validation of single field
Use Validator.element():
Validates a single element, returns true if it is valid, false otherwise.
Here is the example shown in the API:
var validator = $( "#myform" ).validate();
validator.element( "#myselect" );
.valid() validates the entire form, as others have pointed out. The API says:
Checks whether the selected form is valid or whether all selected elements are valid.
Is the LIKE operator case-sensitive with MSSQL Server?
It is not the operator that is case sensitive, it is the column itself.
When a SQL Server installation is performed a default collation is chosen to the instance. Unless explicitly mentioned otherwise (check the collate clause bellow) when a new database is created it inherits the collation from the instance and when a new column is created it inherits the collation from the database it belongs.
A collation like sql_latin1_general_cp1_ci_as dictates how the content of the column should be treated. CI stands for case insensitive and AS stands for accent sensitive.
A complete list of collations is available at https://msdn.microsoft.com/en-us/library/ms144250(v=sql.105).aspx
(a) To check a instance collation
select serverproperty('collation')
(b) To check a database collation
select databasepropertyex('databasename', 'collation') sqlcollation
(c) To create a database using a different collation
create database exampledatabase
collate sql_latin1_general_cp1_cs_as
(d) To create a column using a different collation
create table exampletable (
examplecolumn varchar(10) collate sql_latin1_general_cp1_ci_as null
)
(e) To modify a column collation
alter table exampletable
alter column examplecolumn varchar(10) collate sql_latin1_general_cp1_ci_as null
It is possible to change a instance and database collations but it does not affect previously created objects.
It is also possible to change a column collation on the fly for string comparison, but this is highly unrecommended in a production environment because it is extremely costly.
select
column1 collate sql_latin1_general_cp1_ci_as as column1
from table1
Evaluating a mathematical expression in a string
Based on Perkins' amazing approach, I've updated and improved his "shortcut" for simple algebraic expressions (no functions or variables). Now it works on Python 3.6+ and avoids some pitfalls:
import re, sys
# Kept outside simple_eval() just for performance
_re_simple_eval = re.compile(rb'd([\x00-\xFF]+)S\x00')
def simple_eval(expr):
c = compile(expr, 'userinput', 'eval')
m = _re_simple_eval.fullmatch(c.co_code)
if not m:
raise ValueError(f"Not a simple algebraic expresion: {expr}")
return c.co_consts[int.from_bytes(m.group(1), sys.byteorder)]
Testing, using some of the examples in other answers:
for expr, res in (
('2^4', 6 ),
('2**4', 16 ),
('1 + 2*3**(4^5) / (6 + -7)', -5.0 ),
('7 + 9 * (2 << 2)', 79 ),
('6 // 2 + 0.0', 3.0 ),
('2+3', 5 ),
('6+4/2*2', 10.0 ),
('3+2.45/8', 3.30625),
('3**3*3/3+3', 30.0 ),
):
result = simple_eval(expr)
ok = (result == res and type(result) == type(res))
print("{} {} = {}".format("OK!" if ok else "FAIL!", expr, result))
OK! 2^4 = 6
OK! 2**4 = 16
OK! 1 + 2*3**(4^5) / (6 + -7) = -5.0
OK! 7 + 9 * (2 << 2) = 79
OK! 6 // 2 + 0.0 = 3.0
OK! 2+3 = 5
OK! 6+4/2*2 = 10.0
OK! 3+2.45/8 = 3.30625
OK! 3**3*3/3+3 = 30.0
pros and cons between os.path.exists vs os.path.isdir
os.path.exists will also return True if there's a regular file with that name.
os.path.isdir will only return True if that path exists and is a directory, or a symbolic link to a directory.