How to import a commons-library into netbeans.
Evaluate the error message in NetBeans:
java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
NoClassDeffFoundError means somewhere under the hood in the code you used, a method called another method which invoked a class that cannot be found. So what that means is your code did this: MyFoobarClass foobar = new MyFoobarClass()
and the compiler is confused because nowhere is defined this MyFoobarClass. This is why you get an error.
To know what to do next, you have to look at the error message closely. The words 'org/apache/commons' lets you know that this is the codebase that provides the tools you need. You have a choice, either you can import EVERYTHING in apache commons, or you could import JUST the LogFactory class, or you could do something in between. Like for example just get the logging bit of apache commons.
You'll want to go the middle of the road and get commons-logging. Excellent choice, fire up the google and search for apache commons-logging
. The first link takes you to http://commons.apache.org/proper/commons-logging/. Go to downloads. There you will find the most up-to-date ones. If your project was compiled under ancient versions of commons-logging, then use those same ancient ones because if you use the newer ones, the code may fail because the newer versions are different.
You're going to want to download the commons-logging-1.1.3-bin.zip
or something to that effect. Read what the name is saying. The .zip means it's a compressed file. commons-logging means that this one should contain the LogFactory class you desire. the middle 1.1.3 means that is the version. if you are compiling for an old version, you'll need to match these up, or else you risk the code not compiling right due to changes due to upgrading.
Download that zip. Unzip it. Search around for things that end in .jar
. In netbeans right click your project, click properties, click libraries, click "add jar/folder" and import those jars. Save the project, and re-run, and the errors should be gone.
The binaries don't include the source code, so you won't be able to drill down and see what is happening when you debug. As programmers you should be downloading "the source" of apache commons and compiling from source, generating the jars yourself and importing those for experience. You should be smart enough to understand and correct the source code you are importing. These ancient versions of apache commons might have been compiled under an older version of Java, so if you go too far back, they may not even compile unless you compile them under an ancient version of java.
You need to get the values the same way to get the calculator operation which looks like:
<?php
if($_POST['group1'] == add) {
echo "$_POST['first']+ $_POST['second'];
}
... and so on
?>
Or, to make it easier, just do:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Answer</title>
</head>
<body>
<p>The answer is:
<?php
$first = $_POST['first'];
$second= $_POST['second'];
if($_POST['group1'] == add) {
echo "$first + $second";
}
else if($_POST['group1'] == subtract) {
echo "$first - $second";
}
else if($_POST['group1'] == times) {
echo "$first * $second";
}
else($_POST['group1'] == divide) {
echo "$first / $second";
}
?>
</p>
</body>
</html>
On a different note, it is also always a good practice to add a token to your form and verify it to check if the data was not sent from outside. Here are the steps:
Generate a unique token (you can use hash) Ex:
$token = hash (string $algo , string $data [, bool $raw_output = FALSE ] );
Assign this token to a session variable. Ex:
$_SESSION['form_token'] = $token;
Add a hidden input to submit the token. Ex:
input type="hidden" name="token" value="{$token}"
then as part of your validation, check if the submitted token matches the session var.
Ex: if ( $_POST['token'] === $_SESSION['form_token'] ) ....
The first code line, Option Explicit
means (in simple terms) that all of your variables have to be explicitly declared by Dim
statements. They can be any type, including object, integer, string, or even a variant.
This line: Dim envFrmwrkPath As Range
is declaring the variable envFrmwrkPath
of type Range
. This means that you can only set it to a range.
This line: Set envFrmwrkPath = ActiveSheet.Range("D6").Value
is attempting to set the Range
type variable to a specific Value that is in cell D6
. This could be a integer or a string for example (depends on what you have in that cell) but it's not a range.
I'm assuming you want the value stored in a variable. Try something like this:
Dim MyVariableName As Integer
MyVariableName = ActiveSheet.Range("D6").Value
This assumes you have a number (like 5) in cell D6. Now your variable will have the value.
For simplicity sake of learning, you can remove or comment out the Option Explicit
line and VBA will try to determine the type of variables at run time.
Try this to get through this part of your code
Dim envFrmwrkPath As String
Dim ApplicationName As String
Dim TestIterationName As String
create folder Maven inside this folder extract download file
this file should C:\Program Files\YourFolderName must in C:\Program Files drive
goto This PC -> right click -> properties -> advanced system -> environment variable
user variable ----> new & ** note create two variable ** if not may be give error i) variable name = MAVEN variable value = C:\Program Files\MAVEN
ii) variable name = MAVEN_HOME variable value = C:\Program Files\MAVEN\apache-maven-3.6.3\apache-maven-3.6.3
system variable
path ---> Edit---> new----give path of this folder
i) C:\Program Files\MAVEN
ii) C:\Program Files\MAVEN\apache-maven-3.6.3\bin
Hurrraaaaayyyyy
Because you imported scipy, not sparse. Try from scipy import sparse
?
Android ("vanilla" android without custom launchers and touch interfaces) does not allow changing of the application icon, because it is sealed in the .apk
tightly once the program is compiled. There is no way to change it to a 'drawable' programmatically using standard APIs. You may achieve your goal by using a widget instead of an icon. Widgets are customisable. Please read this :http://www.cnet.com/8301-19736_1-10278814-251.html and this http://developer.android.com/guide/topics/appwidgets/index.html.
Also look here: https://github.com/jgilfelt/android-viewbadger. It can help you.
As for badge numbers. As I said before - there is no standard way for doing this. But we all know that Android is an open operating system and we can do everything we want with it, so the only way to add a badge number - is either to use some 3-rd party apps or custom launchers, or front-end touch interfaces: Samsung TouchWiz or Sony Xperia's interface. Other answers use this capabilities and you can search for this on stackoverflow, e.g. here. But I will repeat one more time: there is no standard API for this and I want to say it is a bad practice. App's icon notification badge is an iOS pattern and it should not be used in Android apps anyway. In Andrioid there is a status bar notifications for these purposes:http://developer.android.com/guide/topics/ui/notifiers/notifications.html So, if Facebook or someone other use this - it is not a common pattern or trend we should consider. But if you insist anyway and don't want to use home screen widgets then look here, please:
How does Facebook add badge numbers on app icon in Android?
As you see this is not an actual Facebook app it's TouchWiz. In vanilla android this can be achieved with Nova Launcher http://forums.androidcentral.com/android-applications/199709-how-guide-global-badge-notifications.html So if you will see icon badges somewhere, be sure it is either a 3-rd party launcher or touch interface (frontend wrapper). May be sometime Google will add this capability to the standard Android API.
You can use a regular expresion to for example replace all non-alphanumeric characters with commas:
s = Regex.Replace(s, "[^0-9A-Za-z]+", ",");
Note: The +
after the set will make it replace each group of non-alphanumeric characters with a comma. If you want to replace each character with a comma, just remove the +
.
startService(new Intent(this, MyService.class));
Just writing this line was not sufficient for me. Service still did not work. Everything had worked only after registering service at manifest
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
...
<service
android:name=".MyService"
android:label="My Service" >
</service>
</application>
Spring Boot 1.4 Use this for Javascript HTML Json all compressions.
server.compression.enabled: true
server.compression.mime-types: application/json,application/xml,text/html,text/xml,text/plain,text/css,application/javascript
In the for, you have an iteration, then for each element of that loop which probably is a scalar, has no index. When each element is an empty array, single variable, or scalar and not a list or array you cannot use indices.
output.path
Local disk directory to store all your output files (Absolute path).
Example: path.join(__dirname, "build/")
Webpack will output everything into localdisk/path-to-your-project/build/
output.publicPath
Where you uploaded your bundled files. (absolute path, or relative to main HTML file)
Example: /assets/
Assumed you deployed the app at server root http://server/
.
By using /assets/
, the app will find webpack assets at: http://server/assets/
. Under the hood, every urls that webpack encounters will be re-written to begin with "/assets/
".
src="picture.jpg"
Re-writes ?src="/assets/picture.jpg"
Accessed by: (
http://server/assets/picture.jpg
)
src="/img/picture.jpg"
Re-writes ?src="/assets/img/picture.jpg"
Accessed by: (
http://server/assets/img/picture.jpg
)
num= int(input("Enter the numbner"))
isDivisible= False
int=2
while i<num:
if num%i==0
isDivisible True
print("The number {} is divisible by {}.".format(num,i))
i +=1
if isDivisible:
print("The number {} is not prime.".format(num))
else:
print("The number {} is a prime number.".format(num))
But do remember to place it BEFORE PROJECT(< project_name>) command, otherwise it will not work!
My first week of using cmake - after some years of GNU autotools - so I am still learning (better then writing m4 macros), but I think modifying CMAKE_INSTALL_PREFIX after setting project is the better place.
CMakeLists.txt
cmake_minimum_required (VERSION 2.8)
set (CMAKE_INSTALL_PREFIX /foo/bar/bubba)
message("CIP = ${CMAKE_INSTALL_PREFIX} (should be /foo/bar/bubba")
project (BarkBark)
message("CIP = ${CMAKE_INSTALL_PREFIX} (should be /foo/bar/bubba")
set (CMAKE_INSTALL_PREFIX /foo/bar/bubba)
message("CIP = ${CMAKE_INSTALL_PREFIX} (should be /foo/bar/bubba")
First run (no cache)
CIP = /foo/bar/bubba (should be /foo/bar/bubba
-- The C compiler identification is GNU 4.4.7
-- etc, etc,...
CIP = /usr/local (should be /foo/bar/bubba
CIP = /foo/bar/bubba (should be /foo/bar/bubba
-- Configuring done
-- Generating done
Second run
CIP = /foo/bar/bubba (should be /foo/bar/bubba
CIP = /foo/bar/bubba (should be /foo/bar/bubba
CIP = /foo/bar/bubba (should be /foo/bar/bubba
-- Configuring done
-- Generating done
Let me know if I am mistaken, I have a lot of learning to do. It's fun.
You are missing PIL (Python Image Library and Imaging package). To install PIL I used
pip install pillow
For my machine running Mac OSX 10.6.8, I downloaded Imaging package and installed it from source. http://effbot.org/downloads/Imaging-1.1.6.tar.gz and cd into Download directory. Then run these:
$ gunzip Imaging-1.1.6.tar.gz
$ tar xvf Imaging-1.1.6.tar
$ cd Imaging-1.1.6
$ python setup.py install
Or if you have PIP installed in your Mac
pip install http://effbot.org/downloads/Imaging-1.1.6.tar.gz
then you can use:
from PIL import Image
in your python code.
If no calculations are necessary after every row, it's much quicker to add rows in python, then convert to numpy. Here are timing tests using python 3.6 vs. numpy 1.14, adding 100 rows, one at a time:
import numpy as np
from time import perf_counter, sleep
def time_it():
# Compare performance of two methods for adding rows to numpy array
py_array = [[0, 1, 2], [0, 2, 0]]
py_row = [4, 5, 6]
numpy_array = np.array(py_array)
numpy_row = np.array([4,5,6])
n_loops = 100
start_clock = perf_counter()
for count in range(0, n_loops):
numpy_array = np.vstack([numpy_array, numpy_row]) # 5.8 micros
duration = perf_counter() - start_clock
print('numpy 1.14 takes {:.3f} micros per row'.format(duration * 1e6 / n_loops))
start_clock = perf_counter()
for count in range(0, n_loops):
py_array.append(py_row) # .15 micros
numpy_array = np.array(py_array) # 43.9 micros
duration = perf_counter() - start_clock
print('python 3.6 takes {:.3f} micros per row'.format(duration * 1e6 / n_loops))
sleep(15)
#time_it() prints:
numpy 1.14 takes 5.971 micros per row
python 3.6 takes 0.694 micros per row
So, the simple solution to the original question, from seven years ago, is to use vstack() to add a new row after converting the row to a numpy array. But a more realistic solution should consider vstack's poor performance under those circumstances. If you don't need to run data analysis on the array after every addition, it is better to buffer the new rows to a python list of rows (a list of lists, really), and add them as a group to the numpy array using vstack() before doing any data analysis.
(ps - I couldn't comment) I think your best bet is something like you've done, or similar to:
$user = User::where('mobile', Input::get('mobile'));
$user->exists() and $user = $user->first();
Oh, also: count()
instead if exists
but this could be something used after get
.
Go to command windows (cmd) then type:
"c:\Progam Files(x86)\GnuWin32\bin\awk"
SELECT id,
IF(type = 'P', amount, amount * -1) as amount
FROM report
See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html.
Additionally, you could handle when the condition is null. In the case of a null amount:
SELECT id,
IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as amount
FROM report
The part IFNULL(amount,0)
means when amount is not null return amount else return 0.
I was trying to call a REST endpoint from a microservice and I was using the resttemplate's put method.
In my design if any error occurred inside the REST endpoint it should return a JSON error response, it was working for some calls but not for this put one, it returned the white label error page instead.
So I did some investigation and I found out that;
Spring try to understand the caller if it is a machine then it returns JSON response or if it is a browser than it returns the white label error page HTML.
As a result: my client app needed to say to REST endpoint that the caller is a machine, not a browser so for this the client app needed to add 'application/json' into the ACCEPT header explicitly for the resttemplate's 'put' method. I added this to the header and solved the problem.
my call to the endpoint:
restTemplate.put(url, request, param1, param2);
for above call I had to add below header param.
headers.set("Accept", MediaType.APPLICATION_JSON_UTF8_VALUE);
or I tried to change put to exchange as well, in this case, exchange call added the same header for me and solved the problem too but I don't know why :)
restTemplate.exchange(....)
You can try this...
$(document).ready(function() {
$("button").click(function(){
var checkBoxValues = [];
$.each($("input[name='check_name']:checked"), function(){
checkBoxValues.push($(this).val());
});
console.log(checkBoxValues);
});
});
This usually happens when you change the project directory physically without first delete in Eclipse. You can view and delete these hidden projects in the following view:
Window -> Show View -> Other -> General -> Navigator
Then simply just continue with the process of import existing project.
Some possible solutions.
This creates a String with length-times '0' filled and replaces then the '0' with the charToFill (old school).
String s = String.format("%0" + length + "d", 0).replace('0', charToFill);
This creates a List containing length-times Strings with charToFill and then joining the List into a String.
String s = String.join("", Collections.nCopies(length, String.valueOf(charToFill)));
This creates a unlimited java8 Stream with Strings with charToFill, limits the output to length and collects the results with a String joiner (new school).
String s = Stream.generate(() -> String.valueOf(charToFill)).limit(length).collect(Collectors.joining());
you can try this too And it will work:
DECLARE
a NUMBER;
b NUMBER;
BEGIN
a :=: a; --this will take input from user
b :=: b;
DBMS_OUTPUT.PUT_LINE('a = '|| a);
DBMS_OUTPUT.PUT_LINE('b = '|| b);
END;
Here is the best way i got.
#content {
background-image:url('smiley.gif');
background-repeat:no-repeat;
background-size:cover;
}
Check on the w3schools
More Available options
background-size: auto|length|cover|contain|initial|inherit;
Here is how to make one:
http://24ways.org/2008/checking-out-progress-meters
Here are some inspiration examples:
In case someone is feverishly googling to solve the bouncing images carousel thing, this helped me:
.fusion-carousel .fusion-carousel-item img {
width: auto;
height: 146px;
max-height: 146px;
object-fit: contain;
}
For completeness: Instead of using def
you could give a name to a lambda
function:
first2 = lambda s: s[:2]
I have Had the same issue and the only Solution i found was open Package manager> Select Microsoft and .Net as Package Source and You will install it..
An asynchronous version of extension function:
public static async Task<WebResponse> GetResponseAsyncNoEx(this WebRequest request)
{
try
{
return await request.GetResponseAsync();
}
catch(WebException ex)
{
return ex.Response;
}
}
Export:
mongo/bin> mongoexport -d webmitta -c domain -o domain-k.json
Import:
mongoimport -d dbname -c newCollecionname --file domain-k.json
Where
webmitta(db name)
domain(Collection Name)
domain-k.json(output file name)
With log4j 1.x I find the best way is to use a DOMConfigurator to submit one of a predefined set of XML log configurations (say, one for normal use and one for debugging).
Making use of these can be done with something like this:
public static void reconfigurePredefined(String newLoggerConfigName) {
String name = newLoggerConfigName.toLowerCase();
if ("default".equals(name)) {
name = "log4j.xml";
} else {
name = "log4j-" + name + ".xml";
}
if (Log4jReconfigurator.class.getResource("/" + name) != null) {
String logConfigPath = Log4jReconfigurator.class.getResource("/" + name).getPath();
logger.warn("Using log4j configuration: " + logConfigPath);
try (InputStream defaultIs = Log4jReconfigurator.class.getResourceAsStream("/" + name)) {
new DOMConfigurator().doConfigure(defaultIs, LogManager.getLoggerRepository());
} catch (IOException e) {
logger.error("Failed to reconfigure log4j configuration, could not find file " + logConfigPath + " on the classpath", e);
} catch (FactoryConfigurationError e) {
logger.error("Failed to reconfigure log4j configuration, could not load file " + logConfigPath, e);
}
} else {
logger.error("Could not find log4j configuration file " + name + ".xml on classpath");
}
}
Just call this with the appropriate config name, and make sure that you put the templates on the classpath.
Try:
$post = $wp_query->post;
Then pass the function:
$post->ID
Use the id selector #
$('#passwordsNoMatchRegister').show();
If your firewall is on, turn it off and use IPv4 to test your app in the actual device, then test your application.
You don't need the CELL() part of your formulas:
=INDIRECT(ADDRESS(B1,B2))
or
=OFFSET($A$1, B1-1,B2-1)
will both work. Note that both INDIRECT
and OFFSET
are volatile functions. Volatile functions can slow down calculation because they are calculated at every single recalculation.
o(n sequre) is polynimal time complexity while o(2^n) is exponential time complexity if p=np when best case , in the worst case p=np not equal becasue when input size n grow so long or input sizer increase so longer its going to worst case and handling so complexity growth rate increase and depend on n size of input when input is small it is polynimal when input size large and large so p=np not equal it means growth rate depend on size of input "N". optimization, sat, clique, and independ set also met in exponential to polynimal.
How about this solution (class implementation of SystemProperties
is available here):
private var sIsProbablyRunningOnEmulator: Boolean? = null
fun isProbablyRunningOnEmulator(): Boolean {
var result = sIsProbablyRunningOnEmulator
if (result != null)
return result
// Android SDK emulator
result = (Build.FINGERPRINT.startsWith("google/sdk_gphone_")
&& Build.FINGERPRINT.endsWith(":user/release-keys")
&& Build.MANUFACTURER == "Google" && Build.PRODUCT.startsWith("sdk_gphone_") && Build.BRAND == "google"
&& Build.MODEL.startsWith("sdk_gphone_"))
//
|| Build.FINGERPRINT.startsWith("generic")
|| Build.FINGERPRINT.startsWith("unknown")
|| Build.MODEL.contains("google_sdk")
|| Build.MODEL.contains("Emulator")
|| Build.MODEL.contains("Android SDK built for x86")
//bluestacks
|| "QC_Reference_Phone" == Build.BOARD && !"Xiaomi".equals(Build.MANUFACTURER, ignoreCase = true) //bluestacks
|| Build.MANUFACTURER.contains("Genymotion")
|| Build.HOST.startsWith("Build") //MSI App Player
|| Build.BRAND.startsWith("generic") && Build.DEVICE.startsWith("generic")
|| Build.PRODUCT == "google_sdk"
// another Android SDK emulator check
|| SystemProperties.getProp("ro.kernel.qemu") == "1"
sIsProbablyRunningOnEmulator = result
return result
}
Note that some emulators fake exact specs of real devices, so it might be impossible to detect it. I've added what I could, but I don't think there is a 100% way to detect if it's really an emulator or not.
Here a tiny snippet you can make in the APK to show various things about it, so you could add your own rules:
textView.text = "FINGERPRINT:${Build.FINGERPRINT}\n" +
"MODEL:${Build.MODEL}\n" +
"MANUFACTURER:${Build.MANUFACTURER}\n" +
"BRAND:${Build.BRAND}\n" +
"DEVICE:${Build.DEVICE}\n" +
"BOARD:${Build.BOARD}\n" +
"HOST:${Build.HOST}\n" +
"PRODUCT:${Build.PRODUCT}\n"
ORA-06512 is part of the error stack. It gives us the line number where the exception occurred, but not the cause of the exception. That is usually indicated in the rest of the stack (which you have still not posted).
In a comment you said
"still, the error comes when pNum is not between 12 and 14; when pNum is between 12 and 14 it does not fail"
Well, your code does this:
IF ((pNum < 12) OR (pNum > 14)) THEN
RAISE vSOME_EX;
That is, it raises an exception when pNum is not between 12 and 14. So does the rest of the error stack include this line?
ORA-06510: PL/SQL: unhandled user-defined exception
If so, all you need to do is add an exception block to handle the error. Perhaps:
PROCEDURE PX(pNum INT,pIdM INT,pCv VARCHAR2,pSup FLOAT)
AS
vSOME_EX EXCEPTION;
BEGIN
IF ((pNum < 12) OR (pNum > 14)) THEN
RAISE vSOME_EX;
ELSE
EXECUTE IMMEDIATE 'INSERT INTO M'||pNum||'GR (CV, SUP, IDM'||pNum||') VALUES('||pCv||', '||pSup||', '||pIdM||')';
END IF;
exception
when vsome_ex then
raise_application_error(-20000
, 'This is not a valid table: M'||pNum||'GR');
END PX;
The documentation covers handling PL/SQL exceptions in depth.
If you use phpMyAdmin, click on Home
, then Variables
on the top menu. Look for the port
setting on the page. The value it is set to is the port your MySQL server is running on.
At first check out that your linked server is in the list by this query
select name from sys.servers
If it not exists then try to add to the linked server
EXEC sp_addlinkedserver @server = 'SERVER_NAME' --or may be server ip address
After that login to that linked server by
EXEC sp_addlinkedsrvlogin 'SERVER_NAME'
,'false'
,NULL
,'USER_NAME'
,'PASSWORD'
Then you can do whatever you want ,treat it like your local server
exec [SERVER_NAME].[DATABASE_NAME].dbo.SP_NAME @sample_parameter
Finally you can drop that server from linked server list by
sp_dropserver 'SERVER_NAME', 'droplogins'
If it will help you then please upvote.
To list all local groups which have users assigned to them, use this command:
cut -d: -f1 /etc/group | sort
For more info- > Unix groups, Cut command, sort command
the best solution when you are perform on navigation drawer
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
menu.setGroupVisible(0,false);
return true;
}
Dim f as Range
Set f=ActiveSheet.Cells.Find(...)
If Not f Is Nothing then
msgbox "Row=" & f.Row & vbcrlf & "Column=" & f.Column
Else
msgbox "value not found!"
End If
Use forward slashes. See explanation here
you can use the built in StringBuilder append() and insert() methods, for padding of variable string lengths:
AbstractStringBuilder append(CharSequence s, int start, int end) ;
For Example:
private static final String MAX_STRING = " "; //20 spaces
Set<StringBuilder> set= new HashSet<StringBuilder>();
set.add(new StringBuilder("12345678"));
set.add(new StringBuilder("123456789"));
set.add(new StringBuilder("1234567811"));
set.add(new StringBuilder("12345678123"));
set.add(new StringBuilder("1234567812234"));
set.add(new StringBuilder("1234567812222"));
set.add(new StringBuilder("12345678122334"));
for(StringBuilder padMe: set)
padMe.append(MAX_STRING, padMe.length(), MAX_STRING.length());
If the preceding error in log was this: "ERROR - HikariPool-1 - jdbcUrl is required with driverClassName" then the solution is to rewrite "url" to "jdbc-url" according to this: Database application.yml for Spring boot from applications.properties
$mylabel.text( $mylabel.text().replace('-', '') );
Since text()
gets the value, and text( "someValue" )
sets the value, you just place one inside the other.
Would be the equivalent of doing:
var newValue = $mylabel.text().replace('-', '');
$mylabel.text( newValue );
EDIT:
I hope I understood the question correctly. I'm assuming $mylabel
is referencing a DOM element in a jQuery object, and the string is in the content of the element.
If the string is in some other variable not part of the DOM, then you would likely want to call the .replace()
function against that variable before you insert it into the DOM.
Like this:
var someVariable = "-123456";
$mylabel.text( someVariable.replace('-', '') );
or a more verbose version:
var someVariable = "-123456";
someVariable = someVariable.replace('-', '');
$mylabel.text( someVariable );
You can simply use use $parent.$index .where parent will represent object of parent repeating object .
The main differences between InnoDB and MyISAM ("with respect to designing a table or database" you asked about) are support for "referential integrity" and "transactions".
If you need the database to enforce foreign key constraints, or you need the database to support transactions (i.e. changes made by two or more DML operations handled as single unit of work, with all of the changes either applied, or all the changes reverted) then you would choose the InnoDB engine, since these features are absent from the MyISAM engine.
Those are the two biggest differences. Another big difference is concurrency. With MyISAM, a DML statement will obtain an exclusive lock on the table, and while that lock is held, no other session can perform a SELECT or a DML operation on the table.
Those two specific engines you asked about (InnoDB and MyISAM) have different design goals. MySQL also has other storage engines, with their own design goals.
So, in choosing between InnoDB and MyISAM, the first step is in determining if you need the features provided by InnoDB. If not, then MyISAM is up for consideration.
A more detailed discussion of differences is rather impractical (in this forum) absent a more detailed discussion of the problem space... how the application will use the database, how many tables, size of the tables, the transaction load, volumes of select, insert, updates, concurrency requirements, replication features, etc.
The logical design of the database should be centered around data analysis and user requirements; the choice to use a relational database would come later, and even later would the choice of MySQL as a relational database management system, and then the selection of a storage engine for each table.
Allow only Alphabets in EditText android:
InputFilter letterFilter = new InputFilter() {
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
String filtered = "";
for (int i = start; i < end; i++) {
char character = source.charAt(i);
if (!Character.isWhitespace(character)&&Character.isLetter(character)) {
filtered += character;
}
}
return filtered;
}
};
editText.setFilters(new InputFilter[]{letterFilter});
Wouldn't it just be a case of:
ArrayList<ArrayList<String>> outer = new ArrayList<ArrayList<String>>();
ArrayList<String> nodeList = new ArrayList<String>();
// Fill in nodeList here...
outer.add(nodeList);
Repeat as necesary.
This should return you a list in the format you specified.
DOS/Windows: use Code page
chcp 65001>NUL
type ascii.txt > unicode.txt
Command chcp
can be used to change the code page. Code page 65001 is Microsoft name for UTF-8. After setting code page, the output generated by following commands will be of code page set.
I got fixed this by running the following command.
env LDFLAGS="-I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib" pip install psycopg2
Reference : https://stackoverflow.com/a/39800677/4270698
You can do
Intent i = new Intent(classname.this , targetclass.class);
startActivity(i);
The best solution would be to read in the file, then decide which kind of image it is and send out the appropriate header
$filename = basename($file);
$file_extension = strtolower(substr(strrchr($filename,"."),1));
switch( $file_extension ) {
case "gif": $ctype="image/gif"; break;
case "png": $ctype="image/png"; break;
case "jpeg":
case "jpg": $ctype="image/jpeg"; break;
case "svg": $ctype="image/svg+xml"; break;
default:
}
header('Content-type: ' . $ctype);
(Note: the correct content-type for JPG files is image/jpeg
)
It helps in correct sorting in the case that you will need to concatenate this "integer" with something else (another number or text) which will require to be sorted as a "text" then.
for example,
if you will need to use the integer field numbers (let's say 5) concatenated as A-005 or 10/0005
Although the answer I originally marked as chosen is correct and achieves what I asked there is a better way of doing this (which others acknowledged but didn't go into). A composite unique index should be created on the table consisting of fund_id
and date
.
ALTER TABLE funds ADD UNIQUE KEY `fund_date` (`fund_id`, `date`);
Then when inserting a record add the condition when a conflict is encountered:
INSERT INTO funds (`fund_id`, `date`, `price`)
VALUES (23, DATE('2013-02-12'), 22.5)
ON DUPLICATE KEY UPDATE `price` = `price`; --this keeps the price what it was (no change to the table) or:
INSERT INTO funds (`fund_id`, `date`, `price`)
VALUES (23, DATE('2013-02-12'), 22.5)
ON DUPLICATE KEY UPDATE `price` = 22.5; --this updates the price to the new value
This will provide much better performance to a sub-query and the structure of the table is superior. It comes with the caveat that you can't have NULL values in your unique key columns as they are still treated as values by MySQL.
shift column gdp up:
df.gdp = df.gdp.shift(-1)
and then remove the last row
I am not sure if anyone else ran into this problem or may need to see this. But I spent about 3 hours trying to solve this issue:
I wanted to implement a simple goBack() on the click of a button. I thought I was off to a good start because my App.js was already wrapped in the Router and I was importing { BrowserRouter as Router } from 'react-router-dom'; ... Since the Router element allows me to assess the history object.
ex:
import React from 'react';
import './App.css';
import Splash from './components/Splash';
import Header from './components/Header.js';
import Footer from './components/Footer';
import Info from './components/Info';
import Timer from './components/Timer';
import Options from './components/Options';
import { BrowserRouter as Router, Route } from 'react-router-dom';
function App() {
return (
<Router>
<Header />
<Route path='/' component={Splash} exact />
<Route path='/home' component={Info} exact />
<Route path='/timer' component={Timer} exact />
<Route path='/options' component={Options} exact />
<Footer />
</Router>
);
}
export default App;
BUT the trouble was on my Nav (a child component) module, I had to 'import { withRouter } from 'react-router-dom';' and then force an export with:
export default withRouter(Nav);
ex:
import React from 'react';
import { withRouter } from 'react-router-dom';
class Nav extends React.Component {
render() {
return (
<div>
<label htmlFor='back'></label>
<button id='back' onClick={ () => this.props.history.goBack() }>Back</button>
<label htmlFor='logOut'></label>
<button id='logOut' ><a href='./'>Log-Out</a>
</button>
</div>
);
}
}
export default withRouter(Nav);
in summary, withRouter was created because of a known issue in React where in certain scenarios when inheritance from a router is refused, a forced export is necessary.
My previous version of this answer had links, that kept becoming dead.
So, I've pointed it to the internet archive to preserve the original answer.
Maybe you can try something like this:
Using a directive
directive('watchChange', function() {
return {
scope: {
onchange: '&watchChange'
},
link: function(scope, element, attrs) {
element.on('input', function() {
scope.onchange();
});
}
};
});
Not able to run Appium {“message”:”A new session could not be created. (Original error: ‘java -version’ failed
I used Jdk 1.8 and JRE 1.8
, Classpath
is also set properly but I observed that Java command gives Error to initialization of VM (java/lang/NoClassDefFoundError: java/lang/Object)
Solution:
Uninstalled JRE and JDK completely
Installed JRE 1.8 then
Installed JDK 1.8
Set Classpath
check Java command works or not and its working
also able to execute the Appium program thru Eclipse Kepler Service Release 2 with JDK1.8 support
arrayData.forEach((key : any, val: any) => {
key['index'] = val + 1;
arrayData2.forEach((keys : any, vals :any) => {
if (key.group_id == keys.id) {
key.group_name = keys.group_name;
}
})
})
You can use axes.set_prop_cycle
(example).
You can use axes.set_color_cycle
(example).
You can use Axes.set_default_color_cycle
.
1.Go to My Computer Properties
2.Then click on Advance setting.
3.Go to Environment variable
4.Set the path to
F:\oracle\product\10.2.0\db_2\perl\5.8.3\lib\MSWin32-x86;F:\oracle\product\10.2.0\db_2\perl\5.8.3\lib;F:\oracle\product\10.2.0\db_2\perl\5.8.3\lib\MSWin32-x86;F:\oracle\product\10.2.0\db_2\perl\site\5.8.3;F:\oracle\product\10.2.0\db_2\perl\site\5.8.3\lib;F:\oracle\product\10.2.0\db_2\sysman\admin\scripts;
change your drive and folder depending on your requirement...
Just an update to this - I've been having a similar problem updating the action attribute of a form with jQuery.
After some testing it turns out that the command: $('#myForm').attr('action','new_url.html');
silently fails if the action attribute of the form is empty. If i update the action attribute of my form to contain some text, the jquery works.
DotNetCoders has a starter article on it: http://www.dotnetcoders.com/web/Articles/ShowArticle.aspx?article=50. They talk about how to set up the switches in the configuration file and how to write the code, but it is pretty old (2002).
There's another article on CodeProject: A Treatise on Using Debug and Trace classes, including Exception Handling, but it's the same age.
CodeGuru has another article on custom TraceListeners: Implementing a Custom TraceListener
I get good mileage out of date.js:
d = new Date();
d.add(-10).days(); // subtract 10 days
Nice!
Website includes this beauty:
Datejs doesn’t just parse strings, it slices them cleanly in two
To delete all records from a table without deleting the table.
DELETE FROM table_name
use with care, there is no undo!
To remove a table
DROP TABLE table_name
In Xcode 9 in the left panel open/choose your file in project navigator. If file is not there, drug-and-drop it into the project navigator.
On right panel find Text Settings and change Line Endings to Windows (CRLF) .
You can delete column on i
index like this:
df.drop(df.columns[i], axis=1)
It could work strange, if you have duplicate names in columns, so to do this you can rename column you want to delete column by new name. Or you can reassign DataFrame like this:
df = df.iloc[:, [j for j, c in enumerate(df.columns) if j != i]]
Store your results in variables, and use them in your HTML and add the necessary styling.
$usercity = $ip['cityName'];
$usercountry = $ip['countryName'];
And in the HTML, you could do:
<div id="userdetails">
<p> User's IP: <?php echo $usercity; ?> </p>
<p> Country: <?php echo $usercountry; ?> </p>
</div>
Now, you can simply add the styles for country
class in your CSS, like so:
#userdetails {
/* styles go here */
}
Alternatively, you could also use this in your HTML:
<p style="font-size:15px; font-color: green;"><?php echo $userip; ?> </p>
<p style="font-size:15px; font-color: green;"><?php echo $usercountry; ?> </p>
Hope this helps!
cur.execute( "SELECT * FROM records WHERE email LIKE %s", (search,) )
I do not why, but this works for me . rather than use '%s'
.
Let us start from the recursive definition of a palindrome:
This definition can be coded straight into JavaScript:
function isPalindrome(s) {
var len = s.length;
// definition clauses 1. and 2.
if (len < 2) {
return true;
}
// note: len >= 2
// definition clause 3.
if (s[0] != s[len - 1]) {
return false;
}
// note: string is of form s = 'a' + t + 'a'
// note: s.length >= 2 implies t.length >= 0
var t = s.substr(1, len - 2);
return isPalindrome(t);
}
Here is some additional test code for MongoDB's mongo JavaScript shell, in a web browser with debugger replace print() with console.log()
function test(s) {
print('isPalindrome(' + s + '): ' + isPalindrome(s));
}
test('');
test('a');
test('ab');
test('aa');
test('aab');
test('aba');
test('aaa');
test('abaa');
test('neilarmstronggnortsmralien');
test('neilarmstrongxgnortsmralien');
test('neilarmstrongxsortsmralien');
I got this output:
$ mongo palindrome.js
MongoDB shell version: 2.4.8
connecting to: test
isPalindrome(): true
isPalindrome(a): true
isPalindrome(ab): false
isPalindrome(aa): true
isPalindrome(aab): false
isPalindrome(aba): true
isPalindrome(aaa): true
isPalindrome(abaa): false
isPalindrome(neilarmstronggnortsmralien): true
isPalindrome(neilarmstrongxgnortsmralien): true
isPalindrome(neilarmstrongxsortsmralien): false
An iterative solution is:
function isPalindrome(s) {
var len = s.length;
if (len < 2) {
return true;
}
var i = 0;
var j = len - 1;
while (i < j) {
if (s[i] != s[j]) {
return false;
}
i += 1;
j -= 1;
}
return true;
}
I was trying to use CURL to do some https API calls with php and ran into this problem. I noticed a recommendation on the php site which got me up and running: http://php.net/manual/en/function.curl-setopt.php#110457
Please everyone, stop setting CURLOPT_SSL_VERIFYPEER to false or 0. If your PHP installation doesn't have an up-to-date CA root certificate bundle, download the one at the curl website and save it on your server:
http://curl.haxx.se/docs/caextract.html
Then set a path to it in your php.ini file, e.g. on Windows:
curl.cainfo=c:\php\cacert.pem
Turning off CURLOPT_SSL_VERIFYPEER allows man in the middle (MITM) attacks, which you don't want!
If you don't want to include the full path, you can do
add_executable(main main.cpp)
target_link_libraries(main bingitup)
bingitup
is the same name you'd give a target if you create the static library in a CMake project:
add_library(bingitup STATIC bingitup.cpp)
CMake automatically adds the lib
to the front and the .a
at the end on Linux, and .lib
at the end on Windows.
If the library is external, you might want to add the path to the library using
link_directories(/path/to/libraries/)
Use ls or find to have all the files that were created today.
Using ls : ls -ltr | grep "$(date '+%b %e')"
Using find : cd $YOUR_DIRECTORY
; find . -ls 2>/dev/null| grep "$(date '+%b %e')"
Variables are available only in the scope you defined them. If you define a variable inside a function, you won't be able to access it outside of it.
Define variable with var
outside the function (and of course before it) and then assign 10
to it inside function:
var value;
$(function() {
value = "10";
});
console.log(value); // 10
Note that you shouldn't omit the first line in this code (var value;
), because otherwise you are assigning value to undefined variable. This is bad coding practice and will not work in strict mode. Defining a variable (var variable;
) and assigning value to a variable (variable = value;
) are two different things. You can't assign value to variable that you haven't defined.
It might be irrelevant here, but $(function() {})
is a shortcut for $(document).ready(function() {})
, which executes a function as soon as document is loaded. If you want to execute something immediately, you don't need it, otherwise beware that if you run it before DOM has loaded, value will be undefined
until it has loaded, so console.log(value);
placed right after $(function() {})
will return undefined
. In other words, it would execute in following order:
var value;
console.log(value);
value = "10";
See also:
Must say I agree with that the most elegant solution to this is using boost::lexical_cast. You can then catch the bad_lexical_cast that might occure, and do something when it fails, instead of getting 0.0 which atof gives.
#include <boost/lexical_cast.hpp>
#include <string>
int main()
{
std::string str = "3.14";
double strVal;
try {
strVal = boost::lexical_cast<double>(str);
} catch(bad_lexical_cast&) {
//Do your errormagic
}
return 0;
}
This is actually a very difficult problem (mathematically), and I'm working on the same thing almost. I asked a similar question on Stackoverflow but got no response, but posted in DocType (StackOverflow for HTML/CSS) and got a response. Check it out http://doctype.com/javascript-image-zoom-css3-transforms-calculate-origin-example
I'm in the middle of building a jQuery plugin that does this (Google Maps style zoom using CSS3 Transforms). I've got the zoom to mouse cursor bit working fine, still trying to figure out how to allow the user to drag the canvas around like you can do in Google Maps. When I get it working I'll post code here, but check out above link for the mouse-zoom-to-point part.
I didn't realise there was scale and translate methods on Canvas context, you can achieve the same thing using CSS3 eg. using jQuery:
$('div.canvasContainer > canvas')
.css('-moz-transform', 'scale(1) translate(0px, 0px)')
.css('-webkit-transform', 'scale(1) translate(0px, 0px)')
.css('-o-transform', 'scale(1) translate(0px, 0px)')
.css('transform', 'scale(1) translate(0px, 0px)');
Make sure you set the CSS3 transform-origin to 0, 0 (-moz-transform-origin: 0 0). Using CSS3 transform allows you to zoom in on anything, just make sure the container DIV is set to overflow: hidden to stop the zoomed edges spilling out of the sides.
Whether you use CSS3 transforms, or canvas' own scale and translate methods is upto you, but check the above link for the calculations.
Update: Meh! I'll just post the code here rather than get you to follow a link:
$(document).ready(function()
{
var scale = 1; // scale of the image
var xLast = 0; // last x location on the screen
var yLast = 0; // last y location on the screen
var xImage = 0; // last x location on the image
var yImage = 0; // last y location on the image
// if mousewheel is moved
$("#mosaicContainer").mousewheel(function(e, delta)
{
// find current location on screen
var xScreen = e.pageX - $(this).offset().left;
var yScreen = e.pageY - $(this).offset().top;
// find current location on the image at the current scale
xImage = xImage + ((xScreen - xLast) / scale);
yImage = yImage + ((yScreen - yLast) / scale);
// determine the new scale
if (delta > 0)
{
scale *= 2;
}
else
{
scale /= 2;
}
scale = scale < 1 ? 1 : (scale > 64 ? 64 : scale);
// determine the location on the screen at the new scale
var xNew = (xScreen - xImage) / scale;
var yNew = (yScreen - yImage) / scale;
// save the current screen location
xLast = xScreen;
yLast = yScreen;
// redraw
$(this).find('div').css('-moz-transform', 'scale(' + scale + ')' + 'translate(' + xNew + 'px, ' + yNew + 'px' + ')')
.css('-moz-transform-origin', xImage + 'px ' + yImage + 'px')
return false;
});
});
You will of course need to adapt it to use the canvas scale and translate methods.
Update 2: Just noticed I'm using transform-origin together with translate. I've managed to implement a version that just uses scale and translate on their own, check it out here http://www.dominicpettifer.co.uk/Files/Mosaic/MosaicTest.html Wait for the images to download then use your mouse wheel to zoom, also supports panning by dragging the image around. It's using CSS3 Transforms but you should be able to use the same calculations for your Canvas.
Here's a Boolean thing:
if (not suffix == "flac" ) or (not suffix == "cue" ): # WRONG! FAILS
print filename + ' is not a flac or cue file'
but
if not (suffix == "flac" or suffix == "cue" ): # CORRECT!
print filename + ' is not a flac or cue file'
(not a) or (not b) == not ( a and b )
,
is false only if a and b are both true
not (a or b)
is true only if a and be are both false.
Using Bootstrap 3's grid system:
<div class="container">
<div class="row">
<div class="col-xs-4">Menu</div>
<div class="col-xs-8">
<div class="row">
<div class="col-md-4 col-md-push-8">Right Content</div>
<div class="col-md-8 col-md-pull-4">Content</div>
</div>
</div>
</div>
</div>
Working example: http://bootply.com/93614
First, we set two columns that will stay in place no matter the screen resolution (col-xs-*
).
Next, we divide the larger, right hand column in to two columns that will collapse on top of each other on tablet sized devices and lower (col-md-*
).
Finally, we shift the display order using the matching class (col-md-[push|pull]-*
). You push the first column over by the amount of the second, and pull the second by the amount of the first.
The null character is '\0'
, not '/0'
.
while (*(forward++) != '\0')
The above linked list display in opposite direction. I think the correct implementation of insert method should be
public void insert(int d1, double d2) {
Link link = new Link(d1, d2);
if(first==null){
link.nextLink = null;
first = link;
last=link;
}
else{
last.nextLink=link;
link.nextLink=null;
last=link;
}
}
set android:dividerHeight="1dp"
<ListView
android:id="@+id/myphnview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@drawable/dividerheight"
android:background="#E9EAEC"
android:clickable="true"
android:divider="@color/white"
android:dividerHeight="1dp"
android:headerDividersEnabled="true" >
</ListView>
The Visual Studio Build tools are a different download than the IDE. They appear to be a pretty small subset, and they're called Build Tools for Visual Studio 2019 (download).
You can use the GUI to do the installation, or you can script the installation of msbuild:
vs_buildtools.exe --add Microsoft.VisualStudio.Workload.MSBuildTools --quiet
Microsoft.VisualStudio.Workload.MSBuildTools is a "wrapper" ID for the three subcomponents you need:
You can find documentation about the other available CLI switches here.
The build tools installation is much quicker than the full IDE. In my test, it took 5-10 seconds. With --quiet
there is no progress indicator other than a brief cursor change. If the installation was successful, you should be able to see the build tools in %programfiles(x86)%\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin
.
If you don't see them there, try running without --quiet
to see any error messages that may occur during installation.
here you can specify whichever field you want in your output and also which you don't.
POST index_name/_search
{
"_source": {
"includes": [ "field_name", "field_name" ],
"excludes": [ "field_name" ]
},
"query" : {
"match" : { "field_name" : "value" }
}
}
The best way to compare 2 strings ignoring the case of the letters is to use the String.Equals static method specifying an ordinal ignore case string comparison. This is also the fastest way, much faster than converting the strings to lower or upper case and comparing them after that.
I tested the performance of both approaches and the ordinal ignore case string comparison was more than 9 times faster! It is also more reliable than converting strings to lower or upper case (check out the Turkish i problem). So always use the String.Equals method to compare strings for equality:
String.Equals(string1, string2, StringComparison.OrdinalIgnoreCase);
If you want to perform a culture specific string comparison you can use the following code:
String.Equals(string1, string2, StringComparison.CurrentCultureIgnoreCase);
Please note that the second example uses the the string comparison logic of the current culture, which makes it slower than the "ordinal ignore case" comparison in the first example, so if you don't need any culture specific string comparison logic and you are after maximum performance, use the "ordinal ignore case" comparison.
For more information, read the full story on my blog.
The job of the database is to store data so that it can be used by the enterprise. Part of making that data useful is ensuring that it is meaningful. Allowing someone to enter an unlimited number of characters for their first name isn't ensuring meaningful data.
Building these constraints into the business layer is a good idea, but that doesn't ensure that the database will remain intact. The only way to guarantee that the data rules are not violated is to enforce them at the lowest level possible in the database.
Just get rid of the parenthesis and that will give you an array with one element and:
var test = tesst.match(/a(.*)j/);
var test = tesst.match(/a.*j/);
If you add parenthesis the match() function will find two match for you one for whole expression and one for the expression inside the parenthesis
If you only want the first match found, you might want to use RegExp.exec() instead.
You can use the below code:
RegExp(/a.*j/).exec("afskfsd33j")
Somehow, no one listed the simplest way:
class A
{
public:
int a, b;
};
class B : public A
{
B()
{
a = 0;
b = 0;
}
};
You can't access base members in the initializer list, but the constructor itself, just as any other member method, may access public
and protected
members of the base class.
In addition to the accepted answer you can use this if you want to group by multiple columns:
<ul ng-repeat="(key, value) in players | groupBy: '[team,name]'">
If you have a form action and an input type="submit"
inside form tags, it's going to submit the old fashioned way and basically refresh the page. When doing AJAX type transactions this isn't the desired effect you are after.
Remove the action. Or remove the form altogether, though in cases it does come in handy to serialize to cut your workload. If the form tags remain, move the button outside the form tags, or alternatively make it a link with an onclick or click handler as opposed to an input button. Jquery UI Buttons works great in this case because you can mimic an input button with an a tag element.
You can use str.isalpha()
.
For example:
s = 'a123b'
for char in s:
print(char, char.isalpha())
Output:
a True
1 False
2 False
3 False
b True
An other approach is to use splice.
The
splice()
method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.
N.B : In case you're working with reactive frameworks, it will update the "view", your array "knowing" you've updated it.
Answer :
var item = {...}
var items = [{id:2}, {id:2}, {id:2}];
let foundIndex = items.findIndex(element => element.id === item.id)
items.splice(foundIndex, 1, item)
And in case you want to only change a value of an item, you can use find function :
// Retrieve item and assign ref to updatedItem
let updatedItem = items.find((element) => { return element.id === item.id })
// Modify object property
updatedItem.aProp = ds.aProp
You could use replicate
or sapply
:
R> colMeans(replicate(10000, sample(100, size=815, replace=TRUE, prob=NULL))) R> sapply(seq_len(10000), function(...) mean(sample(100, size=815, replace=TRUE, prob=NULL)))
replicate
is a wrapper for the common use of sapply
for repeated evaluation of an expression (which will usually involve random number generation).
I used Adobe's detection kit, originally suggested by justpassinby. Their system is nice because it detects the version number and compares it for you against your 'required version'
One bad thing is it does an alert showing the detected version of flash, which isn't very user friendly. All of a sudden a box pops up with some seemingly random numbers.
Some modifications you might want to consider:
Most form inputs are always set, even if not filled up, so you must check for the emptiness too.
Since !empty()
is already checks for both, you can use this:
if (!empty($_POST["mail"])) {
echo "Yes, mail is set";
} else {
echo "No, mail is not set";
}
select deptname from dept_1
where exists
(
SELECT DeptId,COUNT(*)
FROM emp_1
where salary>1000
and emp_1.deptid=dept_1.deptid
GROUP BY DeptId
having count(*)>2)
It seems you have found your solution, but still it will be helpful to others, on this page on point based on Chrome 59.
4.Note the red triangle in the top-right of the Animation Frame Fired event. Whenever you see a red triangle, it's a warning that there may be an issue related to this event.
If you hover on these triangle you can see those are the violation handler errors and as per point 4. yes there is some issue related to that event.
Use:
#define convertToString(x) #x
int main()
{
convertToString(42); // Returns const char* equivalent of 42
}
I was using CakePHP and I was seeing this error:
This page isn’t working
localhost is currently unable to handle this request.
HTTP ERROR 500
I went to see the CakePHP Debug Level defined at app\config\core.php:
/**
* CakePHP Debug Level:
*
* Production Mode:
* 0: No error messages, errors, or warnings shown. Flash messages redirect.
*
* Development Mode:
* 1: Errors and warnings shown, model caches refreshed, flash messages halted.
* 2: As in 1, but also with full debug messages and SQL output.
* 3: As in 2, but also with full controller dump.
*
* In production mode, flash messages redirect after a time interval.
* In development mode, you need to click the flash message to continue.
*/
Configure::write('debug', 0);
I chanted the value from 0 to 1:
Configure::write('debug', 1);
After this change, when trying to reload the page again, I saw the corresponding error:
Fatal error: Uncaught Exception: Facebook needs the CURL PHP extension.
Conclusion: The solution in my case to see the errors was to change the CakePHP Debug Level from 0 to 1 in order to show errors and warnings.
Just as a quick addition to this. I was having the same problem and while Webpack was compiling my tests and the application was running fine. When I was importing my component into the test file I was using the incorrect case on one of the imports and that was causing the same error.
import myComponent from '../../src/components/myComponent'
Should have been
import myComponent from '../../src/components/MyComponent'
Note that the import name myComponent
depends on the name of the export inside the MyComponent
file.
You can use Task Scheduler Managed Wrapper:
using System;
using Microsoft.Win32.TaskScheduler;
class Program
{
static void Main(string[] args)
{
// Get the service on the local machine
using (TaskService ts = new TaskService())
{
// Create a new task definition and assign properties
TaskDefinition td = ts.NewTask();
td.RegistrationInfo.Description = "Does something";
// Create a trigger that will fire the task at this time every other day
td.Triggers.Add(new DailyTrigger { DaysInterval = 2 });
// Create an action that will launch Notepad whenever the trigger fires
td.Actions.Add(new ExecAction("notepad.exe", "c:\\test.log", null));
// Register the task in the root folder
ts.RootFolder.RegisterTaskDefinition(@"Test", td);
// Remove the task we just created
ts.RootFolder.DeleteTask("Test");
}
}
}
Alternatively you can use native API or go for Quartz.NET. See this for details.
When looking up your external IP address on a NATed host, quite a few answers suggest using HTTP based methods like ifconfig.me
eg:
$ curl ifconfig.me/ip
Over the years I have seen many of these sites come and go, I find this DNS based method more robust:
$ dig +short myip.opendns.com @resolver1.opendns.com
I have this handy alias in my ~/.bashrc
:
alias wip='dig +short myip.opendns.com @resolver1.opendns.com'
I fixed an error like this changing the places of the routes in routes.php, for example i had something like this:
Route::resource('Mensajes', 'MensajeriaController');
Route::get('Mensajes/modificar', 'MensajeriaController@modificarEstado');
and then I put it like this:
Route::get('Mensajes/modificar', 'MensajeriaController@modificarEstado');
Route::resource('Mensajes', 'MensajeriaController');
Using lookup tables and the like works, but is just overkill, here are some very simple ways of taking a string to hex and hex back to a string:
#include <stdexcept>
#include <sstream>
#include <iomanip>
#include <string>
#include <cstdint>
std::string string_to_hex(const std::string& in) {
std::stringstream ss;
ss << std::hex << std::setfill('0');
for (size_t i = 0; in.length() > i; ++i) {
ss << std::setw(2) << static_cast<unsigned int>(static_cast<unsigned char>(in[i]));
}
return ss.str();
}
std::string hex_to_string(const std::string& in) {
std::string output;
if ((in.length() % 2) != 0) {
throw std::runtime_error("String is not valid length ...");
}
size_t cnt = in.length() / 2;
for (size_t i = 0; cnt > i; ++i) {
uint32_t s = 0;
std::stringstream ss;
ss << std::hex << in.substr(i * 2, 2);
ss >> s;
output.push_back(static_cast<unsigned char>(s));
}
return output;
}
In a shameless attempt to steal some votes, SecurityProtocol
is an Enum
with the [Flags]
attribute. So you can do this:
[Net.ServicePointManager]::SecurityProtocol =
[Net.SecurityProtocolType]::Tls12 -bor `
[Net.SecurityProtocolType]::Tls11 -bor `
[Net.SecurityProtocolType]::Tls
Or since this is PowerShell, you can let it parse a string for you:
[Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls"
Then you don't technically need to know the TLS version.
I copied and pasted this from a script I created after reading this answer because I didn't want to cycle through all the available protocols to find one that worked. Of course, you could do that if you wanted to.
Final note - I have the original (minus SO edits) statement in my PowerShell profile so it's in every session I start now. It's not totally foolproof since there are still some sites that just fail but I surely see the message in question much less frequently.
#For Unable to 'apt update' my Ubuntu 19.04
The repositories for older releases that are not supported (like 11.04, 11.10 and 13.04) get moved to an archive server. There are repositories available at http://old-releases.ubuntu.com.
first break up this file
cp /etc/apt/sources.list /etc/apt/sources.list.bak sudo sed -i -re 's/([a-z]{2}.)?archive.ubuntu.com|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list
then
sudo apt-get update && sudo apt-get dist-upgrade
There are three ways to save objects from your R session:
The save.image()
function will save all objects currently in your R session:
save.image(file="1.RData")
These objects can then be loaded back into a new R session using the load()
function:
load(file="1.RData")
If you want to save some, but not all objects, you can use the save()
function:
save(city, country, file="1.RData")
Again, these can be reloaded into another R session using the load()
function:
load(file="1.RData")
If you want to save a single object you can use the saveRDS()
function:
saveRDS(city, file="city.rds")
saveRDS(country, file="country.rds")
You can load these into your R session using the readRDS()
function, but you will need to assign the result into a the desired variable:
city <- readRDS("city.rds")
country <- readRDS("country.rds")
But this also means you can give these objects new variable names if needed (i.e. if those variables already exist in your new R session but contain different objects):
city_list <- readRDS("city.rds")
country_vector <- readRDS("country.rds")
grep -P
also uses libpcre, but is much more widely installed. To find a complete title
section of an html document, even if it spans multiple lines, you can use this:
grep -P '(?s)<title>.*</title>' example.html
Since the PCRE project implements to the perl standard, use the perl documentation for reference:
Try,
# cat test.sh
#!/bin/bash
/bin/touch file.txt
cron as:
* * * * * /bin/sh /home/myUser/scripts/test.sh
And you can confirm this by:
# tailf /var/log/cron
I m invoking the weighted average through reflection. And had used method with more than one parameter.
Class cls = Class.forName(propFile.getProperty(formulaTyp));// reading class name from file
Object weightedobj = cls.newInstance(); // invoke empty constructor
Class<?>[] paramTypes = { String.class, BigDecimal[].class, BigDecimal[].class }; // 3 parameter having first is method name and other two are values and their weight
Method printDogMethod = weightedobj.getClass().getMethod("applyFormula", paramTypes); // created the object
return BigDecimal.valueOf((Double) printDogMethod.invoke(weightedobj, formulaTyp, decimalnumber, weight)); calling the method
The below trick worked for me.
1) Comment/delete the below configuration from server.xml file (inside conf folder) of tomcat.
2) Delete the existing ROOT folder (If any) residing inside tomcat webapps folder. And rename your war (e.g: test.war ) file to ROOT.war.
Remember that while renaming war file to ROOT.war "ROOT" should be in caps.
Limitation: You can deploy only one application inside one tomcat instance.
Call the set hide method in view Will appear and Disappear. if you will not call the method in view will disappear with status false.It will hide the navigation bar in complete navigation hierarchy
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.setNavigationBarHidden(true, animated: true)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.navigationController?.setNavigationBarHidden(false, animated:true)
}
var last = objList.LastOrDefault();
foreach (var item in objList)
{
if (item.Equals(last))
{
}
}
First of all, Android does not recommend you to do that within the back button, but rather using the lifecycle methods provided. The back button should not destroy the Activity.
Activities are being added to the stack, accessible from the Overview (square button since they introduced the Material design in 5.0) when the back button is pressed on the last remaining Activity from the UI stack. If the user wants to close down your app, they should swipe it off (close it) from the Overview menu.
Your app is responsible to stop any background tasks and jobs you don't want to run, on onPause(), onStop() and onDestroy() lifecycle methods. Please read more about the lifecycles and their proper implementation here: http://developer.android.com/training/basics/activity-lifecycle/stopping.html
But to answer your question, you can do hacks to implement the exact behaviour you want, but as I said, it is not recommended:
@Override
public void onBackPressed() {
// make sure you have this outcommented
// super.onBackPressed();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
This should work perfectly for string (or single character) delimiters. Don't forget to include #include <sstream>
.
std::string input = "Alfa=,+Bravo=,+Charlie=,+Delta";
std::string delimiter = "=,+";
std::istringstream ss(input);
std::string token;
std::string::iterator it;
while(std::getline(ss, token, *(it = delimiter.begin()))) {
std::cout << token << " " << '\n'; // Token is extracted using '='
while(*(++it)) ss.get(); // Skip the rest of delimiter if exists ",+"
}
The first while loop extracts a token using the first character of the string delimiter. The second while loop skips the rest of the delimiter and stops at the beginning of the next token.
Take a look at the FormBorderStyle property
form1.FormBorderStyle = FormBorderStyle.FixedSingle;
You may also want to remove the minimize and maximize buttons:
form1.MaximizeBox = false;
form1.MinimizeBox = false;
def Isprime(z):
'''returns True if the number is prime OTW returns false'''
if z<1:
return False
elif z==1:
return False
elif z==2:
return True
else:
for i in range(2,z):
if z%i==0:
return False
else:
return True
This is the way I did it. Of course, there are so many ways you can do it.
if you're using java.util.logging, then there is a configuration file that is doing this to log contents (unless you're using programmatic configuration). So, your options are
1) run post -processor that removes the line breaks
2) change the log configuration AND remove the line breaks from it. Restart your application (server) and you should be good.
Just in case someone still needs it. The successful, not official, way to rename indexes are:
If you happen to get this error "dangled index directory name is", remove index folder in all master nodes (not data nodes), and restart one of the data nodes.
I got these errors with the MsysGit version.
After following all advice I could find here and elsewhere, I ended up:
installing the Cygwin version of Git
on the server (Win XP with Cygwin SSHD), this finally fixed it.
I still use the MsysGit version client side
..in fact, its the only way it works for me, since I get POSIX errors with the Cygwin Git pull from that same sshd server
I suspect some work is still needed this side of Git use.. (ssh+ease of pull/push in Windows)
I would set the child's width this way:
.child {position: absolute; width: calc(100% - padding);}
Padding, in the formula, is the sum of the left and right parent's padding. I admit it is probably not very elegant, but in my case, a div with the function of an overlay, it worked.
You need not store the diff in a 3rd file and then read from in. Instead you make use of the Runtime.exec
Process p = Runtime.getRuntime().exec("diff fileA fileB");
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((s = stdInput.readLine()) != null) {
System.out.println(s);
}
Any Error
object has a stack
member that traps the point at which it was constructed.
var stack = new Error().stack
console.log( stack )
or more simply:
console.trace("Here I am!")
It means that a process or script you have created is sending mail to an account on your local machine (for example, a mail server running on localhost application).
Manage this mail with these commands:
t <message list> type messages
n goto and type next message
e <message list> edit messages
f <message list> give head lines of messages
d <message list> delete messages
s <message list> file append messages to file
u <message list> undelete messages
R <message list> reply to message senders
r <message list> reply to message senders and all recipients
pre <message list> make messages go back to /var/mail
m <user list> mail to specific users
q quit, saving unresolved messages in mbox
x quit, do not remove system mailbox
h print out active message headers
! shell escape
cd [directory] chdir to directory or home if none given
A consists of integers, ranges of same, or user names separated by spaces. If omitted, Mail uses the last message typed.
A consists of user names or aliases separated by spaces. Aliases are defined in .mailrc in your home directory.
I faced this problem today, and the issue was I was preventing event default action in document onclick:
document.onclick = function(e) {
e.preventDefault();
}
Document onclick usually is used for event delegation but it's wrong to prevent default for every event, you must do it only for required elements:
document.onclick = function(e) {
if (e.target instanceof HTMLAnchorElement) e.preventDefault();
}
I know this is pretty late but I want to share my solution.
public static void main(String[] args) {
String whatToPrint = "aword";
int strLen = whatToPrint.length(); //var used for auto adjusting the padding
int floors = 8;
for (int f = 1, h = strLen * floors; f < floors * 2; f += 2, h -= strLen) {
for (int k = 1; k < h; k++) {
System.out.print(" ");//padding
}
for (int g = 0; g < f; g++) {
System.out.print(whatToPrint);
}
System.out.println();
}
}
The spaces on the left of the triangle will automatically adjust itself depending on what character or what word you want to print.
if whatToPrint = "x"
and floors = 3
it will print
x
xxx
xxxxx
If there's no automatic adjustment of the spaces, it will look like this (whatToPrint = "xxx"
same floor count)
xxx
xxxxxxxxx
xxxxxxxxxxxxxxx
So I made add a simple code so that it will not happen.
For left half triangle, just change strLen * floors
to strLen * (floors * 2)
and the f +=2
to f++
.
For right half triangle, just remove this loop for (int k = 1; k < h; k++)
or change h
to 0
, if you choose to remove it, don't delete the System.out.print(" ");
.
Personally, I found that, since we maintain a ngRoutes
collection (long story) i find the most enjoyment from:
GOTO(ri) {
this.router.navigate(this.ngRoutes[ri]);
}
I actually use it as part of one of our interview questions. This way, I can get a near-instant read at who's been developing forever by watching who twitches when they run into GOTO(1)
for Homepage redirection.
After hours of work around most of the solutions here, the problem was solved for me just by installing 32-bit JDK.
To make the round trip "The WordPress Way" on the "front-end" (doesn't work in the context of wp-admin
), you need to use 3 WordPress functions:
wp-admin
- so this will also not be available in admin-ajax
)Note: there's no need to even touch the superglobals ($_GET
) if you do it this way.
On the page where you need to create the link / set the query variable:
if it's a link back to this page, just adding the query variable
<a href="<?php echo esc_url( add_query_arg( 'c', $my_value_for_c ) )?>">
if it's a link to some other page
<a href="<?php echo esc_url( add_query_arg( 'c', $my_value_for_c, site_url( '/some_other_page/' ) ) )?>">
In your functions.php, or some plugin file or custom class (front-end only):
function add_custom_query_var( $vars ){
$vars[] = "c";
return $vars;
}
add_filter( 'query_vars', 'add_custom_query_var' );
On the page / function where you wish to retrieve and work with the query var set in your URL:
$my_c = get_query_var( 'c' );
wp-admin
)On the back end we don't ever run wp()
, so the main WP Query does not get run. As a result, there are no query vars
and the query_vars
hook is not run.
In this case, you'll need to revert to the more standard approach of examining your $_GET
superglobal. The best way to do this is probably:
$my_c = filter_input( INPUT_GET, "c", FILTER_SANITIZE_STRING );
though in a pinch you could do the tried and true
$my_c = isset( $_GET['c'] ? $_GET['c'] : "";
or some variant thereof.
All you need is parent
part if you use pathlib
.
from pathlib import Path
p = Path(r'C:\Program Files\Internet Explorer\iexplore.exe')
print(p.parent)
Will output:
C:\Program Files\Internet Explorer
Case you need all parts (already covered in other answers) use parts
:
p = Path(r'C:\Program Files\Internet Explorer\iexplore.exe')
print(p.parts)
Then you will get a list:
('C:\\', 'Program Files', 'Internet Explorer', 'iexplore.exe')
Saves tone of time.
i think it should be
select convert(varchar(10),StandardCost) +'S' from DimProduct where ProductKey = 212
or
select cast(StandardCost as varchar(10)) + 'S' from DimProduct where ProductKey = 212
I'm not sure if I understand your question properly, but it shouldn't matter if this div is a child of some other div. You can simply get text from all divs with class bgHeaderH2 by using following code:
$(".bgHeaderH2").text();
Think more about what you are installing and navigate Gemfile folder, then try using sudo bundle install
If you use ID then you have direct access to input in JS global scope
myInput.value = 'default_value'
_x000D_
<input id="myInput">
_x000D_
I solved this, without having to completely reinstall Visual Studio 2013.
For those who may come across this in the future, the following steps worked for me:
vs_professional.exe
).If you get the error below, you need to update the Windows Registry to trick the installer into thinking you still have the base version. If you don't get this error, skip to step 3
Click the link for 'examine the log file' and look near the bottom of the log, for this line:
open regedit.exe
and do an Edit > Find...
for that GUID. In my case it was {6dff50d0-3bc3-4a92-b724-bf6d6a99de4f}
. This was found in:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall{6dff50d0-3bc3-4a92-b724-bf6d6a99de4f}
Edit the BundleVersion
value and change it to a lower version. I changed mine from 12.0.21005.13
to 12.0.21000.13
:
Exit the registry
Run the ISO (or vs_professional.exe
) again. If it has a repair button like the image below, you can skip to step 4.
Run the ISO (or vs_professional.exe
) again. This time repair should be visible.
Click Repair
and let it update your installation and apply its embedded license key. This took about 20 minutes.
Now when you run Visual Studio 2013, it should indicate that a license key was applied, under Help > Register Product
:
Hope this helps somebody in the future!
If you want the password prompt to go away then use key based authentication (described here).
To run commands remotely over ssh you have to give them as an argument to ssh, like the following:
root@host:~ # ssh root@www 'ps -ef | grep apache | grep -v grep | wc -l'
Here is a simple answer. Hope it helps someone.
import org.springframework.boot.devtools.remote.client.HttpHeaderInterceptor;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.web.client.RestTemplate;
public String post(SomeRequest someRequest) {
// create a list the headers
List<ClientHttpRequestInterceptor> interceptors = new ArrayList<>();
interceptors.add(new HttpHeaderInterceptor("Accept", MediaType.APPLICATION_JSON_VALUE));
interceptors.add(new HttpHeaderInterceptor("ContentType", MediaType.APPLICATION_JSON_VALUE));
interceptors.add(new HttpHeaderInterceptor("username", "user123"));
interceptors.add(new HttpHeaderInterceptor("customHeader1", "c1"));
interceptors.add(new HttpHeaderInterceptor("customHeader2", "c2"));
// initialize RestTemplate
RestTemplate restTemplate = new RestTemplate();
// set header interceptors here
restTemplate.setInterceptors(interceptors);
// post the request. The response should be JSON string
String response = restTemplate.postForObject(Url, someRequest, String.class);
return response;
}
Execute the command in this format
ALTER TABLE tablename ALTER COLUMN columnname SET NOT NULL;
for setting the column to not null.
please, something went xxx*x, and that's not true at all, check that
JButton Size - java.awt.Dimension[width=400,height=40]
JPanel Size - java.awt.Dimension[width=640,height=480]
JFrame Size - java.awt.Dimension[width=646,height=505]
code (basic stuff from Trail: Creating a GUI With JFC/Swing , and yet I still satisfied that that would be outdated )
EDIT: forget setDefaultCloseOperation()
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class FrameSize {
private JFrame frm = new JFrame();
private JPanel pnl = new JPanel();
private JButton btn = new JButton("Get ScreenSize for JComponents");
public FrameSize() {
btn.setPreferredSize(new Dimension(400, 40));
btn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("JButton Size - " + btn.getSize());
System.out.println("JPanel Size - " + pnl.getSize());
System.out.println("JFrame Size - " + frm.getSize());
}
});
pnl.setPreferredSize(new Dimension(640, 480));
pnl.add(btn, BorderLayout.SOUTH);
frm.add(pnl, BorderLayout.CENTER);
frm.setLocation(150, 100);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // EDIT
frm.setResizable(false);
frm.pack();
frm.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
FrameSize fS = new FrameSize();
}
});
}
}
I use this Swift 5, pure Core Graphics extension that correctly handles non-zero origins in image rects:
extension CGContext {
/// Draw `image` flipped vertically, positioned and scaled inside `rect`.
public func drawFlipped(_ image: CGImage, in rect: CGRect) {
self.saveGState()
self.translateBy(x: 0, y: rect.origin.y + rect.height)
self.scaleBy(x: 1.0, y: -1.0)
self.draw(image, in: CGRect(origin: CGPoint(x: rect.origin.x, y: 0), size: rect.size))
self.restoreGState()
}
}
You can use it exactly like CGContext
's regular draw(: in:)
method:
ctx.drawFlipped(myImage, in: myRect)
In the .h file:
class MyClass {
private:
static int myValue;
};
In the .cpp file:
#include "myclass.h"
int MyClass::myValue = 0;
Use
myString = myString.replace( /\&/g, '&' );
It is easiest to do it on the server side because apparently JavaScript has no native library for handling entities, nor did I find any near the top of search results for the various frameworks that extend JavaScript.
Search for "JavaScript HTML entities", and you might find a few libraries for just that purpose, but they'll probably all be built around the above logic - replace, entity by entity.
Following did the trick for me. From Run -> Edit Configuration.
I use it like this.
xcopy "$(TargetDir)$(TargetName).dll" "$(SolutionDir)Lib\TIRM\x86\" /F /Y
xcopy "$(TargetDir)$(TargetName).lib" "$(SolutionDir)Lib\TIRM\x86\" /F /Y
/F : Copy source is File
/Y : Overwrite and don't ask me
Note the use of this. $(TargetDir) has already '\' "D:\MyProject\bin\" = $(TargetDir)
You can find macro in Command editor
It works fine with the object literal notation:
var map = { key : { "aaa", "rrr" },
key2: { "bbb", "ppp" } // trailing comma leads to syntax error in IE!
}
Btw, the common way to instantiate arrays
var array = [];
// directly with values:
var array = [ "val1", "val2", 3 /*numbers may be unquoted*/, 5, "val5" ];
and objects
var object = {};
Also you can do either:
obj.property // this is prefered but you can also do
obj["property"] // this is the way to go when you have the keyname stored in a var
var key = "property";
obj[key] // is the same like obj.property
Anonymous inner classes implementing or extending the interface of an existing type has been done in other answers, although it is worth noting that multiple methods can be implemented (often with JavaBean-style events, for instance).
A little recognised feature is that although anonymous inner classes don't have a name, they do have a type. New methods can be added to the interface. These methods can only be invoked in limited cases. Chiefly directly on the new
expression itself and within the class (including instance initialisers). It might confuse beginners, but it can be "interesting" for recursion.
private static String pretty(Node node) {
return "Node: " + new Object() {
String print(Node cur) {
return cur.isTerminal() ?
cur.name() :
("("+print(cur.left())+":"+print(cur.right())+")");
}
}.print(node);
}
(I originally wrote this using node
rather than cur
in the print
method. Say NO to capturing "implicitly final
" locals?)
Other way:
CGPoint position = CGPointMake(100,30);
[self setFrame:(CGRect){
.origin = position,
.size = self.frame.size
}];
This i save size parameters and change origin only.
I profiled a few methods to move an item within the same list with timeit. Here are the ones to use if j>i:
+---------------------------------+ ¦ 14.4usec ¦ x[i:i]=x.pop(j), ¦ ¦ 14.5usec ¦ x[i:i]=[x.pop(j)] ¦ ¦ 15.2usec ¦ x.insert(i,x.pop(j)) ¦ +---------------------------------+
and here the ones to use if j<=i:
+--------------------------------------+ ¦ 14.4usec ¦ x[i:i]=x[j],;del x[j] ¦ ¦ 14.4usec ¦ x[i:i]=[x[j]];del x[j] ¦ ¦ 15.4usec ¦ x.insert(i,x[j]);del x[j] ¦ +--------------------------------------+
Not a huge difference if you only use it a few times, but if you do heavy stuff like manual sorting, it's important to take the fastest one. Otherwise, I'd recommend just taking the one that you think is most readable.
Does replacing a character in a String with a null character even work in Java?
No.
Would this be the culprit to the funky characters?
Quite likely.
While the existing answers have given solutions to solve the issue and the second half of the question, they do not provide an answer to the self discovery aspect of the first half of the question that is in bold:
"How can I see which variable causes memory overhead...?"
It may not have been as robust 3 years ago, but the Chrome Developer Tools "Profiles" section is now quite powerful and feature rich. The Chrome team has an insightful article on using it and thus also how garbage collection (GC) works in javascript, which is at the core of this question.
Since delete
is basically the root of the currently accepted answer by Yochai Akoka, it's important to remember what delete does. It's irrelevant if not combined with the concepts of how GC works in the next two answers: if there's an existing reference to an object it's not cleaned up. The answers are more correct, but probably not as appreciated because they require more thought than just writing 'delete'. Yes, one possible solution may be to use delete
, but it won't matter if there's another reference to the memory leak.
Another answer appropriately mentions circular references and the Chrome team documentation can provide much more clarity as well as the tools to verify the cause.
Since delete
was mentioned here, it also may be useful to provide the resource Understanding Delete. Although it does not get into any of the actual solution which is really related to javascript's garbage collector.
Try this.
<span style="padding-right:3px; padding-top: 3px; display:inline-block;">
<img class="manImg" src="images/ico_mandatory.gif"></img>
</span>
%__CD__%
, %CD%
, %=C:%
There's also another dynamic variable %__CD__%
which points to the current directory but alike %CD%
it has a backslash at the end.
This can be useful if you want to append files to the current directory.
With %=C:%
%=D:%
you can access the last accessed directory for the corresponding drive. If the variable is not defined you haven't accessed the drive on the current cmd session.
And %__APPDIR__%
expands to the executable that runs the current script a.k.a. cmd.exe
directory.
400 Bad request Error will be thrown due to incorrect authentication entries.
Note: Mostly due to Incorrect authentication entries due to spell changes will occur 400 Bad request.
Wanted to share what caused the error in my case. Spend couple hours to figure this out, so hopefully it will help to save someone some time.
Strangely enough, the error was raised with the Enable drop directory quota
setting being enabled for the domain.
I am not the expert and don't know the technical explanation, but unticking the mentioned setting sorted the problem.
Use boolean
rather than Boolean
every time you can. This will avoid many NullPointerException
s and make your code more robust.
Boolean
is useful, for example
MessageFormat.format()
.I found a way that seems to work better for me:
ssh-keygen -y -f <private key file>
That command will output the public key for the given private key, so then just compare the output to each *.pub file.
case when field1>0 then field2/field1 else 0 end as field3
Here is a one line lambda that also works:
df["TrueFalse"] = df['col1'].apply(lambda x: 1 if any(i in x for i in searchfor) else 0)
Input:
searchfor = ['og', 'at']
df = pd.DataFrame([('cat', 1000.0), ('hat', 2000000.0), ('dog', 1000.0), ('fog', 330000.0),('pet', 330000.0)], columns=['col1', 'col2'])
col1 col2
0 cat 1000.0
1 hat 2000000.0
2 dog 1000.0
3 fog 330000.0
4 pet 330000.0
Apply Lambda:
df["TrueFalse"] = df['col1'].apply(lambda x: 1 if any(i in x for i in searchfor) else 0)
Output:
col1 col2 TrueFalse
0 cat 1000.0 1
1 hat 2000000.0 1
2 dog 1000.0 1
3 fog 330000.0 1
4 pet 330000.0 0
Though this is not directly related to the OP's exact question but I just found out that using a Oracle reserved word in your query (in my case the alias IN
) can cause the same error.
Example:
SELECT * FROM TBL_INDEPENTS IN
JOIN TBL_VOTERS VO on IN.VOTERID = VO.VOTERID
Or if its in the query itself as a field name
SELECT ..., ...., IN, ..., .... FROM SOMETABLE
That would also throw that error. I hope this helps someone.
Copied from MSDN:
using System;
using System.IO;
class CopyDir
{
public static void Copy(string sourceDirectory, string targetDirectory)
{
DirectoryInfo diSource = new DirectoryInfo(sourceDirectory);
DirectoryInfo diTarget = new DirectoryInfo(targetDirectory);
CopyAll(diSource, diTarget);
}
public static void CopyAll(DirectoryInfo source, DirectoryInfo target)
{
Directory.CreateDirectory(target.FullName);
// Copy each file into the new directory.
foreach (FileInfo fi in source.GetFiles())
{
Console.WriteLine(@"Copying {0}\{1}", target.FullName, fi.Name);
fi.CopyTo(Path.Combine(target.FullName, fi.Name), true);
}
// Copy each subdirectory using recursion.
foreach (DirectoryInfo diSourceSubDir in source.GetDirectories())
{
DirectoryInfo nextTargetSubDir =
target.CreateSubdirectory(diSourceSubDir.Name);
CopyAll(diSourceSubDir, nextTargetSubDir);
}
}
public static void Main()
{
string sourceDirectory = @"c:\sourceDirectory";
string targetDirectory = @"c:\targetDirectory";
Copy(sourceDirectory, targetDirectory);
}
// Output will vary based on the contents of the source directory.
}
I am not sure will this be useful for anyone, since I had to provide other users of the system to schedule the jobs, without giving them access to the actual server(windows) Task Scheduler, I created this reusable app.
Please note users have access to one shared folder on server where they can create required command/task/.bat file. This task then can be scheduled using this app.
App name is Django_Windows_Scheduler
The user that is configured to run this scheduled task must have "Log on as a batch job" rights on the computer that hosts the exe you are launching. This can be configured on the local security policy of the computer that hosts the exe. You can change the policy (on the server hosting the exe) under
Administrative Tools -> Local Security Policy -> Local Policies -> User Rights Assignment -> Log On As Batch Job
Add your user to this list (you could also make the user account a local admin on the machine hosting the exe).
Finally, you could also simply copy your exe from the network location to your local computer and run it from there instead.
Note also that a domain policy could be restricting "Log on as a batch job" rights at your organization.
@ECHO OFF
:Loop
IF "%1"=="" GOTO Continue
SHIFT
GOTO Loop
:Continue
Note: IF "%1"==""
will cause problems if %1
is enclosed in quotes itself.
In that case, use IF [%1]==[]
or, in NT 4 (SP6) and later only, IF "%~1"==""
instead.
Here is a step by step guide (I think this should come pre-loaded with the add-on):
Content-Type
and Value: application/x-www-form-urlencoded
Then in the Body section, you can enter your data to post like:
username=test&name=Firstname+Lastname
Whenever you want to make a post request, from the Headers main menu, select the Content-Type:application/x-www-form-urlencoded
item that you added and it should work.
You have to use a Class
instance because of the generic type erasure during compilation.
public static <T> T convertInstanceOfObject(Object o, Class<T> clazz) {
try {
return clazz.cast(o);
} catch(ClassCastException e) {
return null;
}
}
The declaration of that method is:
public T cast(Object o)
This can also be used for array types. It would look like this:
final Class<int[]> intArrayType = int[].class;
final Object someObject = new int[]{1,2,3};
final int[] instance = convertInstanceOfObject(someObject, intArrayType);
Note that when someObject
is passed to convertToInstanceOfObject
it has the compile time type Object
.
I have to answer, too. The JIT generates tables together with the code from it's static analysis of variable usage. Those table entries are the "GC-Roots" in the current stack frame. As the instruction pointer advances, those table entries become invalid and so ready for garbage collection. Therefore: If it is a scoped variable, you don't need to set it to null - the GC will collect the object. If it is a member or a static variable, you have to set it to null
NOW() normally works in SQL statements and returns the date and time. Check if your database field has the correct type (datetime). Otherwise, you can always use the PHP date() function and insert:
date('Y-m-d H:i:s')
But I wouldn't recommend this.
In case you're using apache's http-client 4:
SSLConnectionSocketFactory sslConnectionSocketFactory =
new SSLConnectionSocketFactory(sslContext,
new String[] { "TLSv1.2" }, null, new HostnameVerifier() {
public boolean verify(String arg0, SSLSession arg1) {
return true;
}
});
I just figured out that for a case where the path involves the use of white space characters, for example, when I need to access the app xyz
which location is :
C:\Program Files\ab cd\xyz.exe
To run this from windows cmd prompt, you need to use
C:\"Program Files"\"ab cd"\xyz.exe
or
"C:\Program Files\ab cd\xyz.exe"
Try using rextract. It will let you extract text using a regular expression and reformat it.
Example:
$ echo "This is 02G05 a test string 20-Jul-2012" | ./rextract '([\d]+G[\d]+)' '${1}'
2G05
I have had another issue giving me a 504. It's pretty far out but I'll write it up here for googlers and posterity...
I have a client calling an IIS hosted webservice hosted in another domain (Active Directory). There is not full trust between the client domain and the domain where the web services is hosted. One of the many challenges with the selective trust between these two domains is that Kerberos does not work when calling from one to the other.
In my case I was trying to call a service in another domain where I found out that a SPN was registered. Like this : http/myurl.test.local (just an example)
This forces the call to use Kerberos instead of letting it fall back to NTLM and this gave me a 405 back from the calling server.
After removing the spn and allowing the call to fall back to NTLM, it works fine.
As I said ... this is not something you are likely to run into, as most organizations do not venture into having such a selective trusts between two domains ... But it gives a 504 and caused me a few (more) gray hairs.
It reappears because your submit button reloads the page. The simplest way to prevent this behavior is to add a return false
to the onclick
like so:
<input type="submit" value="Remove DUMMY" onclick="removeDummy(); return false;" />
Do you mean something like this?
HTML
<button class="test"></button>
CSS
.test{
height:200px;
width:200px;
}
If you want to use inline CSS instead of an external stylesheet, see this:
<button style="height:200px;width:200px"></button>
What I believe you're looking for is a way to work with arrays as object values:
var o = {} // empty Object
var key = 'Orientation Sensor';
o[key] = []; // empty Array, which you can push() values into
var data = {
sampleTime: '1450632410296',
data: '76.36731:3.4651554:0.5665419'
};
var data2 = {
sampleTime: '1450632410296',
data: '78.15431:0.5247617:-0.20050584'
};
o[key].push(data);
o[key].push(data2);
This is standard JavaScript and not something NodeJS specific. In order to serialize it to a JSON string you can use the native JSON.stringify
:
JSON.stringify(o);
//> '{"Orientation Sensor":[{"sampleTime":"1450632410296","data":"76.36731:3.4651554:0.5665419"},{"sampleTime":"1450632410296","data":"78.15431:0.5247617:-0.20050584"}]}'
Yes, just open the "Source" Tab in the dev-tools and navigate to the script you want to change . Make your adjustments directly in the dev tools window and then hit ctrl+s to save the script - know the new js will be used until you refresh the whole page.
Yes, an Abstract Class can have a Constructor. You Can Overload as many Constructor as you want in an Abstract Class. These Contractors Can be used to Initialized the initial state of the Objects Extending the Abstract Class. As we know we can't make an object of an Abstract Class because Objects are Created by the "new" keywords and not by the constructors...they are there for only initializing the state of the subclass Objects.
Later versions of Safari allow you to Disable Cross-Origin Restrictions. Just enable the developer menu from Preferences >> Advanced, and select "Disable Cross-Origin Restrictions" from the develop menu.
If you want local only, then you only need to enable the developer menu, and select "Disable local file restrictions" from the develop menu.
If you want to write it to disk so that it will be easy to read back in as a numpy array, look into numpy.save
. Pickling it will work fine, as well, but it's less efficient for large arrays (which yours isn't, so either is perfectly fine).
If you want it to be human readable, look into numpy.savetxt
.
Edit: So, it seems like savetxt
isn't quite as great an option for arrays with >2 dimensions... But just to draw everything out to it's full conclusion:
I just realized that numpy.savetxt
chokes on ndarrays with more than 2 dimensions... This is probably by design, as there's no inherently defined way to indicate additional dimensions in a text file.
E.g. This (a 2D array) works fine
import numpy as np
x = np.arange(20).reshape((4,5))
np.savetxt('test.txt', x)
While the same thing would fail (with a rather uninformative error: TypeError: float argument required, not numpy.ndarray
) for a 3D array:
import numpy as np
x = np.arange(200).reshape((4,5,10))
np.savetxt('test.txt', x)
One workaround is just to break the 3D (or greater) array into 2D slices. E.g.
x = np.arange(200).reshape((4,5,10))
with open('test.txt', 'w') as outfile:
for slice_2d in x:
np.savetxt(outfile, slice_2d)
However, our goal is to be clearly human readable, while still being easily read back in with numpy.loadtxt
. Therefore, we can be a bit more verbose, and differentiate the slices using commented out lines. By default, numpy.loadtxt
will ignore any lines that start with #
(or whichever character is specified by the comments
kwarg). (This looks more verbose than it actually is...)
import numpy as np
# Generate some test data
data = np.arange(200).reshape((4,5,10))
# Write the array to disk
with open('test.txt', 'w') as outfile:
# I'm writing a header here just for the sake of readability
# Any line starting with "#" will be ignored by numpy.loadtxt
outfile.write('# Array shape: {0}\n'.format(data.shape))
# Iterating through a ndimensional array produces slices along
# the last axis. This is equivalent to data[i,:,:] in this case
for data_slice in data:
# The formatting string indicates that I'm writing out
# the values in left-justified columns 7 characters in width
# with 2 decimal places.
np.savetxt(outfile, data_slice, fmt='%-7.2f')
# Writing out a break to indicate different slices...
outfile.write('# New slice\n')
This yields:
# Array shape: (4, 5, 10)
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00
10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00
20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00
30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00
40.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00
# New slice
50.00 51.00 52.00 53.00 54.00 55.00 56.00 57.00 58.00 59.00
60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00
70.00 71.00 72.00 73.00 74.00 75.00 76.00 77.00 78.00 79.00
80.00 81.00 82.00 83.00 84.00 85.00 86.00 87.00 88.00 89.00
90.00 91.00 92.00 93.00 94.00 95.00 96.00 97.00 98.00 99.00
# New slice
100.00 101.00 102.00 103.00 104.00 105.00 106.00 107.00 108.00 109.00
110.00 111.00 112.00 113.00 114.00 115.00 116.00 117.00 118.00 119.00
120.00 121.00 122.00 123.00 124.00 125.00 126.00 127.00 128.00 129.00
130.00 131.00 132.00 133.00 134.00 135.00 136.00 137.00 138.00 139.00
140.00 141.00 142.00 143.00 144.00 145.00 146.00 147.00 148.00 149.00
# New slice
150.00 151.00 152.00 153.00 154.00 155.00 156.00 157.00 158.00 159.00
160.00 161.00 162.00 163.00 164.00 165.00 166.00 167.00 168.00 169.00
170.00 171.00 172.00 173.00 174.00 175.00 176.00 177.00 178.00 179.00
180.00 181.00 182.00 183.00 184.00 185.00 186.00 187.00 188.00 189.00
190.00 191.00 192.00 193.00 194.00 195.00 196.00 197.00 198.00 199.00
# New slice
Reading it back in is very easy, as long as we know the shape of the original array. We can just do numpy.loadtxt('test.txt').reshape((4,5,10))
. As an example (You can do this in one line, I'm just being verbose to clarify things):
# Read the array from disk
new_data = np.loadtxt('test.txt')
# Note that this returned a 2D array!
print new_data.shape
# However, going back to 3D is easy if we know the
# original shape of the array
new_data = new_data.reshape((4,5,10))
# Just to check that they're the same...
assert np.all(new_data == data)
It sounds maybe like you have the same issue as i do. instead of using MP4, is 3GPP possible? i think i used like HandBrake or something as the video converter... you just need to make sure you have the right encoder, like H.264x or something. sorry for being a little vague, it's been a while. Also, if it's possible, don't bother worrying about android 2.1 anymore, and also, something things just WILL NOT WORK IN EMULATOR. so if it works on a lot of devices, then just assume it works (especially with different manufacurers)
here, you can read my problem and how i solved the issue (after a long time and no one had an answer). i explained in a lot more detail here: android media player not working
Official document of Crypto++ AES is a good start. And from my archive, a basic implementation of AES is as follows:
Please refer here with more explanation, I recommend you first understand the algorithm and then try to understand each line step by step.
#include <iostream>
#include <iomanip>
#include "modes.h"
#include "aes.h"
#include "filters.h"
int main(int argc, char* argv[]) {
//Key and IV setup
//AES encryption uses a secret key of a variable length (128-bit, 196-bit or 256-
//bit). This key is secretly exchanged between two parties before communication
//begins. DEFAULT_KEYLENGTH= 16 bytes
CryptoPP::byte key[ CryptoPP::AES::DEFAULT_KEYLENGTH ], iv[ CryptoPP::AES::BLOCKSIZE ];
memset( key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH );
memset( iv, 0x00, CryptoPP::AES::BLOCKSIZE );
//
// String and Sink setup
//
std::string plaintext = "Now is the time for all good men to come to the aide...";
std::string ciphertext;
std::string decryptedtext;
//
// Dump Plain Text
//
std::cout << "Plain Text (" << plaintext.size() << " bytes)" << std::endl;
std::cout << plaintext;
std::cout << std::endl << std::endl;
//
// Create Cipher Text
//
CryptoPP::AES::Encryption aesEncryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );
CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( ciphertext ) );
stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() );
stfEncryptor.MessageEnd();
//
// Dump Cipher Text
//
std::cout << "Cipher Text (" << ciphertext.size() << " bytes)" << std::endl;
for( int i = 0; i < ciphertext.size(); i++ ) {
std::cout << "0x" << std::hex << (0xFF & static_cast<CryptoPP::byte>(ciphertext[i])) << " ";
}
std::cout << std::endl << std::endl;
//
// Decrypt
//
CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );
CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedtext ) );
stfDecryptor.Put( reinterpret_cast<const unsigned char*>( ciphertext.c_str() ), ciphertext.size() );
stfDecryptor.MessageEnd();
//
// Dump Decrypted Text
//
std::cout << "Decrypted Text: " << std::endl;
std::cout << decryptedtext;
std::cout << std::endl << std::endl;
return 0;
}
For installation details :
sudo apt-get install libcrypto++-dev libcrypto++-doc libcrypto++-utils
If you can access the server over ssh and can run your own scripts you can make a simple fifo server using php (although you will have to recompile php with posix
support for fork
).
The server can be written in anything really, you probably can easily do it in python.
Or the simplest solution would be sending an HttpRequest and not reading the return data but the server might destroy the script before it finish processing.
Example server :
<?php
define('FIFO_PATH', '/home/user/input.queue');
define('FORK_COUNT', 10);
if(file_exists(FIFO_PATH)) {
die(FIFO_PATH . ' exists, please delete it and try again.' . "\n");
}
if(!file_exists(FIFO_PATH) && !posix_mkfifo(FIFO_PATH, 0666)){
die('Couldn\'t create the listening fifo.' . "\n");
}
$pids = array();
$fp = fopen(FIFO_PATH, 'r+');
for($i = 0; $i < FORK_COUNT; ++$i) {
$pids[$i] = pcntl_fork();
if(!$pids[$i]) {
echo "process(" . posix_getpid() . ", id=$i)\n";
while(true) {
$line = chop(fgets($fp));
if($line == 'quit' || $line === false) break;
echo "processing (" . posix_getpid() . ", id=$i) :: $line\n";
// $data = json_decode($line);
// processData($data);
}
exit();
}
}
fclose($fp);
foreach($pids as $pid){
pcntl_waitpid($pid, $status);
}
unlink(FIFO_PATH);
?>
Example client :
<?php
define('FIFO_PATH', '/home/user/input.queue');
if(!file_exists(FIFO_PATH)) {
die(FIFO_PATH . ' doesn\'t exist, please make sure the fifo server is running.' . "\n");
}
function postToQueue($data) {
$fp = fopen(FIFO_PATH, 'w+');
stream_set_blocking($fp, false); //don't block
$data = json_encode($data) . "\n";
if(fwrite($fp, $data) != strlen($data)) {
echo "Couldn't the server might be dead or there's a bug somewhere\n";
}
fclose($fp);
}
$i = 1000;
while(--$i) {
postToQueue(array('xx'=>21, 'yy' => array(1,2,3)));
}
?>
You can always extend String
prototype like this:
// Checks that string starts with the specific string
if (typeof String.prototype.startsWith != 'function') {
String.prototype.startsWith = function (str) {
return this.slice(0, str.length) == str;
};
}
// Checks that string ends with the specific string...
if (typeof String.prototype.endsWith != 'function') {
String.prototype.endsWith = function (str) {
return this.slice(-str.length) == str;
};
}
And use it like this:
var str = 'Hello World';
if( str.startsWith('Hello') ) {
// your string starts with 'Hello'
}
if( str.endsWith('World') ) {
// your string ends with 'World'
}
My current solution uses the async module to execute in series:
var fs = require('fs');
var parse = require('csv-parse');
var async = require('async');
var inputFile='myfile.csv';
var parser = parse({delimiter: ','}, function (err, data) {
async.eachSeries(data, function (line, callback) {
// do something with the line
doSomething(line).then(function() {
// when processing finishes invoke the callback to move to the next one
callback();
});
})
});
fs.createReadStream(inputFile).pipe(parser);
This line:
if(str2==${str}){
Should be:
if( str2 == str ) {
The ${
and }
will give you a parse error, as they should only be used inside Groovy Strings for templating
Probably the quickest way to have primary numbers is the following:
import sympy
list(sympy.primerange(lower, upper+1))
In case you don't need to store them, just use the code above without conversion to the list
. sympy.primerange
is a generator, so it does not consume memory.
In addition @Fredrik Mörk's great answer on strings, to add localization to a form do the following:
"Localizable"
to true
Language
property to the language you want (from a nice drop-down with them all in)Edit: This MSDN article on Localizing Windows Forms is not the original one I linked ... but might shed more light if needed. (the old one has been taken away)
Lookup move /?
on Windows and man mv
on Unix systems
checking with isinstance()
would not be enough if you want to know in run time.
use:
if(someObject.getClass().equals(C.class){
// do something
}
It’s about time someone provides the modern answer to this question. In 2012 when the question was asked, the answers also posted back then were good answers. Why the answers posted in 2016 also use the then long outdated classes SimpleDateFormat
and Date
is a bit more of a mystery to me. java.time
, the modern Java date and time API also known as JSR-310, is so much nicer to work with. You can use it on Android through the ThreeTenABP, see this question: How to use ThreeTenABP in Android Project.
For most purposes I recommend using the milliseconds since the epoch at the start of the day in UTC. To obtain these:
DateTimeFormatter dateFormatter
= DateTimeFormatter.ofPattern("d-MMMM-uuuu", Locale.ENGLISH);
String stringDate = "12-December-2012";
long millisecondsSinceEpoch = LocalDate.parse(stringDate, dateFormatter)
.atStartOfDay(ZoneOffset.UTC)
.toInstant()
.toEpochMilli();
System.out.println(millisecondsSinceEpoch);
This prints:
1355270400000
If you require the time at start of day in some specific time zone, specify that time zone instead of UTC, for example:
.atStartOfDay(ZoneId.of("Asia/Karachi"))
As expected this gives a slightly different result:
1355252400000
Another point to note, remember to supply a locale to your DateTimeFormatter
. I took December to be English, there are other languages where that month is called the same, so please choose the proper locale yourself. If you didn’t provide a locale, the formatter would use the JVM’s locale setting, which may work in many cases, and then unexpectedly fail one day when you run your app on a device with a different locale setting.
The scripts mentioned in previous answers, like:
$("body, html").animate({
scrollTop: $(document).height()
}, 400)
or
$(window).scrollTop($(document).height());
will not work in Chrome and will be jumpy in Safari in case html
tag in CSS has overflow: auto;
property set. It took me nearly an hour to figure out.
Prior to 0.20.203, and officially deprecated in 2.6.0:
hadoop fs -dus [directory]
Since 0.20.203 (dead link) 1.0.4 and still compatible through 2.6.0:
hdfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help
for more info and specifics.
After looking into many answers (most of them are correct for their scenarios) and none of them fix my problem I realized that my case is a bit different:
In my weird scenario my component was being rendered inside the state and therefore couldn't be updated. Below is a simple example:
constructor() {
this.myMethod = this.myMethod.bind(this);
this.changeTitle = this.changeTitle.bind(this);
this.myMethod();
}
changeTitle() {
this.setState({title: 'I will never get updated!!'});
}
myMethod() {
this.setState({body: <div>{this.state.title}</div>});
}
render() {
return <>
{this.state.body}
<Button onclick={() => this.changeTitle()}>Change Title!</Button>
</>
}
After refactoring the code to not render the body from state it worked fine :)
Any operating system has processes (p's) running, say p1, p2, p3 and so forth. Each process usually makes an ongoing usage of files.
Each process is consisted of a process tree (or a process table, in another phrasing).
Usually, Operating systems represent each file in each process by a number (that is to say, in each process tree/table).
The first file used in the process is file0, second is file1, third is file2, and so forth.
Any such number is a file descriptor.
File descriptors are usually integers (0, 1, 2 and not 0.5, 1.5, 2.5).
Given we often describe processes as "process-tables", and given that tables has rows (entries) we can say that the file descriptor cell in each entry, uses to represent the whole entry.
In a similar way, when you open a network socket, it has a socket descriptor.
In some operating systems, you can run out of file descriptors, but such case is extremely rare, and the average computer user shouldn't worry from that.
File descriptors might be global (process A starts in say 0, and ends say in 1 ; Process B starts say in 2, and ends say in 3) and so forth, but as far as I know, usually in modern operating systems, file descriptors are not global, and are actually process-specific (process A starts in say 0 and ends say in 5, while process B starts in 0 and ends say in 10).