Following up on David's answer...
Using SHOW SLAVE STATUS\G
will give human-readable output.
Another scenario, that was not yet mentioned here, that caused this error is an API that receives Pageable
(or Sort
) and passes it, as is, to the JPA repository when calling the API from Swagger.
Swagger default value for the Pageable
parameter is this:
{
"page": 0,
"size": 0,
"sort": [
"string"
]
}
Notice the "string"
there which is a property that does exist. Running the API without deleting or changing it will cause org.springframework.data.mapping.PropertyReferenceException: No property string found for type ...
You can use the report process status ps
command:
ps ax | grep '[m]ysqld'
Set your editor to point to this program:
/Applications/TextEdit.app/Contents/MacOS/TextEdit
With SVN, you should set SVN_EDITOR
environment variable to:
$ export SVN_EDITOR=/Applications/TextEdit.app/Contents/MacOS/TextEdit
And then, when you try committing something, TextEdit will launch.
phpMyAdmin provides a GUI for this within the structure view of a table. Check to select the column you want to move and click the change action at the bottom of the column list. You can then change all of the column properties and you'll find the 'move column' function at the far right of the screen.
Of course this is all just building the queries in the perfectly good top answer but GUI fans might appreciate the alternative.
my phpMyAdmin version is 4.1.7
I like eTicket Support, is very simple to use and install.
.radio-toolbar input[type="radio"] {_x000D_
display: none;_x000D_
}_x000D_
_x000D_
.radio-toolbar label {_x000D_
display: inline-block;_x000D_
background-color: #ddd;_x000D_
padding: 4px 11px;_x000D_
font-family: Arial;_x000D_
font-size: 16px;_x000D_
cursor: pointer;_x000D_
}_x000D_
_x000D_
.radio-toolbar input[type="radio"]:checked+label {_x000D_
background-color: #bbb;_x000D_
}
_x000D_
<div class="radio-toolbar">_x000D_
<input type="radio" id="radio1" name="radios" value="all" checked>_x000D_
<label for="radio1">All</label>_x000D_
_x000D_
<input type="radio" id="radio2" name="radios" value="false">_x000D_
<label for="radio2">Open</label>_x000D_
_x000D_
<input type="radio" id="radio3" name="radios" value="true">_x000D_
<label for="radio3">Archived</label>_x000D_
</div>
_x000D_
First of all, you probably want to add the name
attribute on the radio buttons. Otherwise, they are not part of the same group, and multiple radio buttons can be checked.
Also, since I placed the labels as siblings (of the radio buttons), I had to use the id
and for
attributes to associate them together.
For me what worked has is using NavLink as it has this active class property.
First import it
import { NavLink } from 'react-router-dom';
Use an activeClassName to get the active class property.
<NavLink to="/" activeClassName="active">
Home
</NavLink>
<NavLink to="/store" activeClassName="active">
Store
</NavLink>
<NavLink to="/about" activeClassName="active">
About Us
</NavLink>
Style your class in the css by the property active.
.active{
color:#fcfcfc;
}
In my opinion you should not load and use plugins you don't have to. This particular jQuery plugin doesn't give you anything since directly using the JavaScript sessionStorage
object is exactly the same level of complexity. Nor, does the plugin provide some easier way to interact with other jQuery functionality. In addition the practice of using a plugin discourages a deep understanding of how something works. sessionStorage should be used only if its understood. If its understood, then using the jQuery plugin is actually MORE effort.
Consider using sessionStorage
directly:
https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/Storage#sessionStorage
This worked for me:
git fsck --full --no-reflogs --unreachable --lost-found
git show d6e883ff45be514397dcb641c5a914f40b938c86
git branch helpme 15e521b0f716269718bb4e4edc81442a6c11c139
All of the DISPATCH_QUEUE_PRIORITY_X queues are concurrent queues (meaning they can execute multiple tasks at once), and are FIFO in the sense that tasks within a given queue will begin executing using "first in, first out" order. This is in comparison to the main queue (from dispatch_get_main_queue()), which is a serial queue (tasks will begin executing and finish executing in the order in which they are received).
So, if you send 1000 dispatch_async() blocks to DISPATCH_QUEUE_PRIORITY_DEFAULT, those tasks will start executing in the order you sent them into the queue. Likewise for the HIGH, LOW, and BACKGROUND queues. Anything you send into any of these queues is executed in the background on alternate threads, away from your main application thread. Therefore, these queues are suitable for executing tasks such as background downloading, compression, computation, etc.
Note that the order of execution is FIFO on a per-queue basis. So if you send 1000 dispatch_async() tasks to the four different concurrent queues, evenly splitting them and sending them to BACKGROUND, LOW, DEFAULT and HIGH in order (ie you schedule the last 250 tasks on the HIGH queue), it's very likely that the first tasks you see starting will be on that HIGH queue as the system has taken your implication that those tasks need to get to the CPU as quickly as possible.
Note also that I say "will begin executing in order", but keep in mind that as concurrent queues things won't necessarily FINISH executing in order depending on length of time for each task.
As per Apple:
A concurrent dispatch queue is useful when you have multiple tasks that can run in parallel. A concurrent queue is still a queue in that it dequeues tasks in a first-in, first-out order; however, a concurrent queue may dequeue additional tasks before any previous tasks finish. The actual number of tasks executed by a concurrent queue at any given moment is variable and can change dynamically as conditions in your application change. Many factors affect the number of tasks executed by the concurrent queues, including the number of available cores, the amount of work being done by other processes, and the number and priority of tasks in other serial dispatch queues.
Basically, if you send those 1000 dispatch_async() blocks to a DEFAULT, HIGH, LOW, or BACKGROUND queue they will all start executing in the order you send them. However, shorter tasks may finish before longer ones. Reasons behind this are if there are available CPU cores or if the current queue tasks are performing computationally non-intensive work (thus making the system think it can dispatch additional tasks in parallel regardless of core count).
The level of concurrency is handled entirely by the system and is based on system load and other internally determined factors. This is the beauty of Grand Central Dispatch (the dispatch_async() system) - you just make your work units as code blocks, set a priority for them (based on the queue you choose) and let the system handle the rest.
So to answer your above question: you are partially correct. You are "asking that code" to perform concurrent tasks on a global concurrent queue at the specified priority level. The code in the block will execute in the background and any additional (similar) code will execute potentially in parallel depending on the system's assessment of available resources.
The "main" queue on the other hand (from dispatch_get_main_queue()) is a serial queue (not concurrent). Tasks sent to the main queue will always execute in order and will always finish in order. These tasks will also be executed on the UI Thread so it's suitable for updating your UI with progress messages, completion notifications, etc.
You can use replace
instead of gsub
.
"hello _there_".replace(/_(.*?)_/g, "<div>\$1</div>")
You can configure the output directory using the CONFIGURATION_BUILD_DIR
environment variable.
Short and fast Base64 JavaScript Decode Function without Failsafe:
function decode_base64 (s)
{
var e = {}, i, k, v = [], r = '', w = String.fromCharCode;
var n = [[65, 91], [97, 123], [48, 58], [43, 44], [47, 48]];
for (z in n)
{
for (i = n[z][0]; i < n[z][1]; i++)
{
v.push(w(i));
}
}
for (i = 0; i < 64; i++)
{
e[v[i]] = i;
}
for (i = 0; i < s.length; i+=72)
{
var b = 0, c, x, l = 0, o = s.substring(i, i+72);
for (x = 0; x < o.length; x++)
{
c = e[o.charAt(x)];
b = (b << 6) + c;
l += 6;
while (l >= 8)
{
r += w((b >>> (l -= 8)) % 256);
}
}
}
return r;
}
Use PHP_EOL
which outputs \r\n
or \n
depending on the OS.
Yes, if bar is not None
is more explicit, and thus better, assuming it is indeed what you want. That's not always the case, there are subtle differences: if not bar:
will execute if bar
is any kind of zero or empty container, or False
.
Many people do use not bar
where they really do mean bar is not None
.
We can use std::is_base_of
and std::enable_if
:
(static_assert
can be removed, the above classes can be custom-implemented or used from boost if we cannot reference type_traits
)
#include <type_traits>
#include <list>
class Base {};
class Derived: public Base {};
#if 0 // wrapper
template <class T> class MyClass /* where T:Base */ {
private:
static_assert(std::is_base_of<Base, T>::value, "T is not derived from Base");
typename std::enable_if<std::is_base_of<Base, T>::value, T>::type inner;
};
#elif 0 // base class
template <class T> class MyClass: /* where T:Base */
protected std::enable_if<std::is_base_of<Base, T>::value, T>::type {
private:
static_assert(std::is_base_of<Base, T>::value, "T is not derived from Base");
};
#elif 1 // list-of
template <class T> class MyClass /* where T:list<Base> */ {
static_assert(std::is_base_of<Base, typename T::value_type>::value , "T::value_type is not derived from Base");
typedef typename std::enable_if<std::is_base_of<Base, typename T::value_type>::value, T>::type base;
typedef typename std::enable_if<std::is_base_of<Base, typename T::value_type>::value, T>::type::value_type value_type;
};
#endif
int main() {
#if 0 // wrapper or base-class
MyClass<Derived> derived;
MyClass<Base> base;
// error:
MyClass<int> wrong;
#elif 1 // list-of
MyClass<std::list<Derived>> derived;
MyClass<std::list<Base>> base;
// error:
MyClass<std::list<int>> wrong;
#endif
// all of the static_asserts if not commented out
// or "error: no type named ‘type’ in ‘struct std::enable_if<false, ...>’ pointing to:
// 1. inner
// 2. MyClass
// 3. base + value_type
}
another solution:
add src/myproject
to $GOPATH.
Then import "mylib"
will compile.
Those who prefer to use laravel helpers they can check if a request is ajax using laravel request()
helper.
if(request()->ajax())
// code
Using Search bar
Shift
/editor /appearance/
and thenShow line numbers
toggle buttonFor Windows and Linux
File | Settings | Editor | General | Appearance
For macOS
IntelliJ IDEA | Preferences | Editor | General | Appearance
Using shortcut
Ctrl+Alt+S
Then
Editor > General > Appearance
Click on Show line numbers toggle button.
Recently Selenium has launched Selenium 3 and if you are trying to use Firefox latest version then you have to use GeckoDriver:
System.setProperty("webdriver.gecko.driver","G:\\Selenium\\Firefox driver\\geckodriver.exe");
WebDriver driver = new FirefoxDriver();
Not really, no.
Java doesn't have pointers. If you really wanted you could try to emulate them by building around something like reflection, but it would have all of the complexity of pointers with none of the benefits.
Java doesn't have pointers because it doesn't need them. What kind of answers were you hoping for from this question, i.e. deep down did you hope you could use them for something or was this just curiousity?
$('#effective_to').datepicker({
dateFormat: "dd-mm-yyyy",
changeMonth: true,
changeYear: true,
beforeShow: function() {
$('#ui-datepicker-div').addClass('datepicker');
}
});
CSS
.datepicker {
z-index: 100000 !important;
display: block;
}
This works form me. Even though I called model via ajax
Why not use Html.RenderAction()
?
Then you could put the following into any controller (even creating a new controller for it):
[ChildActionOnly]
public ActionResult MyActionThatGeneratesAPartial(string parameter1)
{
var model = repository.GetThingByParameter(parameter1);
var partialViewModel = new PartialViewModel(model);
return PartialView(partialViewModel);
}
Then you could create a new partial view and have your PartialViewModel
be what it inherits from.
For Razor, the code block in the view would look like this:
@{ Html.RenderAction("Index", "Home"); }
For the WebFormsViewEngine, it would look like this:
<% Html.RenderAction("Index", "Home"); %>
If the original size is 100 x 100 and you want to scale it to 50 x 50, use scaledSize instead of Size.
var icon = {
url: "../res/sit_marron.png", // url
scaledSize: new google.maps.Size(50, 50), // scaled size
origin: new google.maps.Point(0,0), // origin
anchor: new google.maps.Point(0, 0) // anchor
};
var marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, lng),
map: map,
icon: icon
});
This is a slight variation of the above theme but I'm putting here in case others hit this and cannot make sense of it ...as I did.
When using saveXML(), preserveWhiteSpace in the target DOMdocument does not apply to imported nodes (as at PHP 5.6).
Consider the following code:
$dom = new DOMDocument(); //create a document
$dom->preserveWhiteSpace = false; //disable whitespace preservation
$dom->formatOutput = true; //pretty print output
$documentElement = $dom->createElement("Entry"); //create a node
$dom->appendChild ($documentElement); //append it
$message = new DOMDocument(); //create another document
$message->loadXML($messageXMLtext); //populate the new document from XML text
$node=$dom->importNode($message->documentElement,true); //import the new document content to a new node in the original document
$documentElement->appendChild($node); //append the new node to the document Element
$dom->saveXML($dom->documentElement); //print the original document
In this context, the $dom->saveXML();
statement will NOT pretty print the content imported from $message, but content originally in $dom will be pretty printed.
In order to achieve pretty printing for the entire $dom document, the line:
$message->preserveWhiteSpace = false;
must be included after the $message = new DOMDocument();
line - ie. the document/s from which the nodes are imported must also have preserveWhiteSpace = false.
You can find a whole bunch of Linq examples in visual studio.
Just select Help -> Samples
, and then unzip the Linq samples.
Open the linq samples solution and open the LinqSamples.cs of the SampleQueries project.
The answer you are looking for is in method Linq14:
int[] numbersA = { 0, 2, 4, 5, 6, 8, 9 };
int[] numbersB = { 1, 3, 5, 7, 8 };
var pairs =
from a in numbersA
from b in numbersB
where a < b
select new {a, b};
If you want to enable general error logs and slow query error log in the table instead of file
To start logging in table instead of file:
set global log_output = “TABLE”;
To enable general and slow query log:
set global general_log = 1;
set global slow_query_log = 1;
To view the logs:
select * from mysql.slow_log;
select * from mysql.general_log;
For more details visit this link
That should work, I'd put brackets around [Date] as it's a reserved keyword.
I think we have multiple solutions here:
Why? In Java every class is inherited from the Object class itself. So if you have a variable and you would like to know its type. You can use
or
or
isPrimitive()
public static void main(String[] args) {
ClassDemo classOne = new ClassDemo();
Class classOneClass = classOne();
int i = 5;
Class iClass = int.class;
// checking for primitive type
boolean retval1 = classOneClass.isPrimitive();
System.out.println("classOneClass is primitive type? = " + retval1);
// checking for primitive type?
boolean retval2 = iClass.isPrimitive();
System.out.println("iClass is primitive type? = " + retval2);
}
This going to give us:
Find out more here: How to determine the primitive type of a primitive variable?
https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
http://docs.oracle.com/cd/E26806_01/wlp.1034/e14255/com/bea/p13n/expression/operator/Instanceof.html
This line is the problem:
int estimatedPopulation (int currentPopulation,
float growthRate (birthRate, deathRate))
Make it:
int estimatedPopulation (int currentPopulation, float birthRate, float deathRate)
instead and invoke the function with three arguments like
estimatePopulation( currentPopulation, birthRate, deathRate );
OR declare it with two arguments like:
int estimatedPopulation (int currentPopulation, float growthrt ) { ... }
and call it as
estimatedPopulation( currentPopulation, growthRate (birthRate, deathRate));
Probably more important here - C++ (and C) names have scope. You can have two things named the same but not at the same time. In your particular case your grouthRate
variable in the main()
hides the function with the same name. So within main()
you can only access grouthRate
as float
. On the other hand, outside of the main()
you can only access that name as a function, since that automatic variable is only visible within the scope of main()
.
Just hope I didn't confuse you further :)
Convert set to list, and then use get
method of list
Set<Foo> set = ...;
List<Foo> list = new ArrayList<Foo>(set);
Foo obj = list.get(0);
First you should take a note about difference between git am
and git apply
When you are using git am
you usually wanna to apply many patches. Thus should use:
git am *.patch
or just:
git am
Git will find patches automatically and apply them in order ;-)
UPD
Here you can find how to generate such patches
Jason Robinson's answer and Sami Eltamawy answer are excelent.
Just an improvement to complete the aproach, you should use compat ExifInterface.
com.android.support:exifinterface:${lastLibVersion}
You will be able to instantiate the ExifInterface(pior API <24) with InputStream
(from ContentResolver
) instead of uri paths avoiding "File not found exceptions"
https://android-developers.googleblog.com/2016/12/introducing-the-exifinterface-support-library.html
Swift 4:
The simplest answer, in my case needing to ensure one onboarding tutorial view was portrait-only:
extension myViewController {
//manage rotation for this viewcontroller
override open var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return .portrait
}
}
Eezy-peezy.
from functools import partial as p
from operator import mul
map(p(mul,5),my_list)
is one way you could do it ... your teacher probably knows a much less complicated way that was probably covered in class
I've just been banging my head against a wall trying to solve a bug because I read this page and concluded there was no meaningful difference when in practice there is so I'll post this link here in case anyone else finds they get different results out of == and equals.
Object == equality fails, but .Equals succeeds. Does this make sense?
string a = "x";
string b = new String(new []{'x'});
Console.WriteLine("x == x " + (a == b));//True
Console.WriteLine("object x == x " + ((object)a == (object)b));//False
Console.WriteLine("x equals x " + (a.Equals(b)));//True
Console.WriteLine("object x equals x " + (((object)a).Equals((object)b)));//True
One of recent the TFS Rocks pocasts mentioned such an organisation, may have been number 16.
body {
position:relative; // that's it
overflow:hidden;
}
This worked for me with a string-array named shoes
loaded from the projects resources:
Spinner spinnerCountShoes = (Spinner)findViewById(R.id.spinner_countshoes);
ArrayAdapter<String> spinnerCountShoesArrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_spinner_dropdown_item,
getResources().getStringArray(R.array.shoes));
spinnerCountShoes.setAdapter(spinnerCountShoesArrayAdapter);
This is my resource file (res/values/arrays.xml
) with the string-array named shoes
:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="shoes">
<item>0</item>
<item>5</item>
<item>10</item>
<item>100</item>
<item>1000</item>
<item>10000</item>
</string-array>
</resources>
With this method it's easier to make it multilingual (if necessary).
Try the library SimpleDraweeView
<com.facebook.drawee.view.SimpleDraweeView
android:id="@+id/badge_image"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
and now you can simply do:
final Uri uri = Uri.parse(post.getImageUrl());
functions that implement native code are declared native.
The Java Native Interface (JNI) is a programming framework that enables Java code running in a Java Virtual Machine (JVM) to call, and to be called by, native applications (programs specific to a hardware and operating system platform) and libraries written in other languages such as C, C++ and assembly.
I usually just leave my PK named id, and then concatenate my table name and key column name when naming FKs in other tables. I never bother with camel-casing, because some databases discard case-sensitivity and simply return all upper or lower case names anyway. In any case, here's what my version of your tables would look like:
task (id, userid, title);
note (id, taskid, userid, note);
user (id, name);
Note that I also name my tables in the singular, because a row represents one of the objects I'm persisting. Many of these conventions are personal preference. I'd suggest that it's more important to choose a convention and always use it, than it is to adopt someone else's convention.
Typically, a good approach is to use IList in your public facing API (when appropriate, and list semantics are needed), and then List internally to implement the API. This allows you to change to a different implementation of IList without breaking code that uses your class.
The class name List may be changed in next .net framework but the interface is never going to change as interface is contract.
Note that, if your API is only going to be used in foreach loops, etc, then you might want to consider just exposing IEnumerable instead.
Steps:
Example
x=pd.DataFrame([1,2,3,4])
def add(i1, i2):
return i1+i2
x.apply(add,i2=9)
The outcome of this example is that each number in the dataframe will be added to the number 9.
0
0 10
1 11
2 12
3 13
Explanation:
The "add" function has two parameters: i1, i2. The first parameter is going to be the value in data frame and the second is whatever we pass to the "apply" function. In this case, we are passing "9" to the apply function using the keyword argument "i2".
One thing to note when using uuid1
, if you use the default call (without giving clock_seq
parameter) you have a chance of running into collisions: you have only 14 bit of randomness (generating 18 entries within 100ns gives you roughly 1% chance of a collision see birthday paradox/attack). The problem will never occur in most use cases, but on a virtual machine with poor clock resolution it will bite you.
You could also just use the NSUUID API:
let uuid = NSUUID()
If you want to get the string value back out, you can use uuid.UUIDString
.
Note that NSUUID
is available from iOS 6 and up.
To get the checked state of your checkbox the path would be:
this.refs.complete.state.checked
The alternative is to get it from the event passed into the handleChange
method:
event.target.checked
Use LINQ .Cast<int>()
to convert 2D array to IEnumerable<int>
.
LINQPad example:
var arr = new int[,] {
{ 1, 2, 3 },
{ 4, 5, 6 }
};
IEnumerable<int> values = arr.Cast<int>();
Console.WriteLine(values);
Output:
Only with CSS :
CSS:
tr {
width: 100%;
display: inline-table;
table-layout: fixed;
}
table{
height:300px; // <-- Select the height of the table
display: -moz-groupbox; // Firefox Bad Effect
}
tbody{
overflow-y: scroll;
height: 200px; // <-- Select the height of the body
width: 100%;
position: absolute;
}
Bootply : http://www.bootply.com/AgI8LpDugl
I got a GPU called NVIDIA GTX GeForce 1650 Ti
in my machine with tensorflow-gpu==2.2.0
Run the following two lines of code:
import tensorflow as tf
print("Num GPUs Available: ", len(tf.config.experimental.list_physical_devices('GPU')))
Output:
Num GPUs Available: 1
If you want to stick to grep:
grep -A1 'blah' logfile | grep -v "blah"
or alternatively with sed:
sed -n '/blah/{n;p;}' logfile
<-
does assignment in the current environment.
When you're inside a function R creates a new environment for you. By default it includes everything from the environment in which it was created so you can use those variables as well but anything new you create will not get written to the global environment.
In most cases <<-
will assign to variables already in the global environment or create a variable in the global environment even if you're inside a function. However, it isn't quite as straightforward as that. What it does is checks the parent environment for a variable with the name of interest. If it doesn't find it in your parent environment it goes to the parent of the parent environment (at the time the function was created) and looks there. It continues upward to the global environment and if it isn't found in the global environment it will assign the variable in the global environment.
This might illustrate what is going on.
bar <- "global"
foo <- function(){
bar <- "in foo"
baz <- function(){
bar <- "in baz - before <<-"
bar <<- "in baz - after <<-"
print(bar)
}
print(bar)
baz()
print(bar)
}
> bar
[1] "global"
> foo()
[1] "in foo"
[1] "in baz - before <<-"
[1] "in baz - after <<-"
> bar
[1] "global"
The first time we print bar we haven't called foo
yet so it should still be global - this makes sense. The second time we print it's inside of foo
before calling baz
so the value "in foo" makes sense. The following is where we see what <<-
is actually doing. The next value printed is "in baz - before <<-" even though the print statement comes after the <<-
. This is because <<-
doesn't look in the current environment (unless you're in the global environment in which case <<-
acts like <-
). So inside of baz
the value of bar stays as "in baz - before <<-". Once we call baz
the copy of bar inside of foo
gets changed to "in baz" but as we can see the global bar
is unchanged. This is because the copy of bar
that is defined inside of foo
is in the parent environment when we created baz
so this is the first copy of bar
that <<-
sees and thus the copy it assigns to. So <<-
isn't just directly assigning to the global environment.
<<-
is tricky and I wouldn't recommend using it if you can avoid it. If you really want to assign to the global environment you can use the assign function and tell it explicitly that you want to assign globally.
Now I change the <<-
to an assign statement and we can see what effect that has:
bar <- "global"
foo <- function(){
bar <- "in foo"
baz <- function(){
assign("bar", "in baz", envir = .GlobalEnv)
}
print(bar)
baz()
print(bar)
}
bar
#[1] "global"
foo()
#[1] "in foo"
#[1] "in foo"
bar
#[1] "in baz"
So both times we print bar inside of foo
the value is "in foo" even after calling baz
. This is because assign
never even considered the copy of bar
inside of foo because we told it exactly where to look. However, this time the value of bar in the global environment was changed because we explicitly assigned there.
Now you also asked about creating local variables and you can do that fairly easily as well without creating a function... We just need to use the local
function.
bar <- "global"
# local will create a new environment for us to play in
local({
bar <- "local"
print(bar)
})
#[1] "local"
bar
#[1] "global"
as ehogue said, put this in your CREATE TABLE
FOREIGN KEY (customer_id) REFERENCES customers(customer_id)
alternatively, if you already have the table created, use an ALTER TABLE command:
ALTER TABLE `accounts`
ADD CONSTRAINT `FK_myKey` FOREIGN KEY (`customer_id`) REFERENCES `customers` (`customer_id`) ON DELETE CASCADE ON UPDATE CASCADE;
One good way to start learning these commands is using the MySQL GUI Tools, which give you a more "visual" interface for working with your database. The real benefit to that (over Access's method), is that after designing your table via the GUI, it shows you the SQL it's going to run, and hence you can learn from that.
You need to include the appropriate header
#include <stdio.h>
If you're not sure which header a standard function is defined in, the function's man page will state this.
If I understand you right, you can do this:
<img src="image.png" style="background-color:red;" />
In fact, you can even apply a whole background-image
to the image, resulting in two "layers" without the need for multi-background support in the browser ;)
For the first rule,
Click "greater than", then in the value option box, click on the cell criteria you want it to be less than, than use the format drop-down to select your color.
For the second,
Click "less than", then in the value option box, type "=.9*" and then click the cell criteria, then use the formatting just like step 1.
For the third,
Same as the second, except your formula is =".8*" rather than .9.
There isn't really a formal manual, because there's no single style or standard.
So long as you understand the rules of identifier naming you can use whatever you like.
In practice, I find it easier to use lower_case_underscore_separated_identifiers
because it isn't necessary to "Double Quote"
them everywhere to preserve case, spaces, etc.
If you wanted to name your tables and functions "@MyA??! ""betty"" Shard$42"
you'd be free to do that, though it'd be pain to type everywhere.
The main things to understand are:
Unless double-quoted, identifiers are case-folded to lower-case, so MyTable
, MYTABLE
and mytable
are all the same thing, but "MYTABLE"
and "MyTable"
are different;
Unless double-quoted:
SQL identifiers and key words must begin with a letter (a-z, but also letters with diacritical marks and non-Latin letters) or an underscore (_). Subsequent characters in an identifier or key word can be letters, underscores, digits (0-9), or dollar signs ($).
You must double-quote keywords if you wish to use them as identifiers.
In practice I strongly recommend that you do not use keywords as identifiers. At least avoid reserved words. Just because you can name a table "with"
doesn't mean you should.
A parallel can be made of fractions and whole numbers. Some fractions eg 1/7 cannot be represented in decimal form without lots and lots of decimals. Because floating point is binary based the special cases change but the same sort of accuracy problems present themselves.
You can use serialize and base64_encode from the client side. After that, then use unserialize and base64_decode on the server side.
Like:
On the client side, use:
$postvalue = array("a", "b", "c");
$postvalue = base64_encode(serialize($array));
// Your form hidden input
<input type="hidden" name="result" value="<?php echo $postvalue; ?>">
On the server side, use:
$postvalue = unserialize(base64_decode($_POST['result']));
print_r($postvalue) // Your desired array data will be printed here
A jQuery solution would be something like:
$(function () {
$('input').blur();
});
I'd personally make use of the table.insert
function:
table.insert(a,"b");
This saves you from having to iterate over the whole table therefore saving valuable resources such as memory and time.
As answered here: How can I use a Windows batch file to measure the performance of console application?
Below batch "program" should do what you want. Please note that it outputs the data in centiseconds instead of milliseconds. The precision of the used commands is only centiseconds.
Here is an example output:
STARTTIME: 13:42:52,25
ENDTIME: 13:42:56,51
STARTTIME: 4937225 centiseconds
ENDTIME: 4937651 centiseconds
DURATION: 426 in centiseconds
00:00:04,26
Here is the batch script:
@echo off
setlocal
rem The format of %TIME% is HH:MM:SS,CS for example 23:59:59,99
set STARTTIME=%TIME%
rem here begins the command you want to measure
dir /s > nul
rem here ends the command you want to measure
set ENDTIME=%TIME%
rem output as time
echo STARTTIME: %STARTTIME%
echo ENDTIME: %ENDTIME%
rem convert STARTTIME and ENDTIME to centiseconds
set /A STARTTIME=(1%STARTTIME:~0,2%-100)*360000 + (1%STARTTIME:~3,2%-100)*6000 + (1%STARTTIME:~6,2%-100)*100 + (1%STARTTIME:~9,2%-100)
set /A ENDTIME=(1%ENDTIME:~0,2%-100)*360000 + (1%ENDTIME:~3,2%-100)*6000 + (1%ENDTIME:~6,2%-100)*100 + (1%ENDTIME:~9,2%-100)
rem calculating the duratyion is easy
set /A DURATION=%ENDTIME%-%STARTTIME%
rem we might have measured the time inbetween days
if %ENDTIME% LSS %STARTTIME% set set /A DURATION=%STARTTIME%-%ENDTIME%
rem now break the centiseconds down to hors, minutes, seconds and the remaining centiseconds
set /A DURATIONH=%DURATION% / 360000
set /A DURATIONM=(%DURATION% - %DURATIONH%*360000) / 6000
set /A DURATIONS=(%DURATION% - %DURATIONH%*360000 - %DURATIONM%*6000) / 100
set /A DURATIONHS=(%DURATION% - %DURATIONH%*360000 - %DURATIONM%*6000 - %DURATIONS%*100)
rem some formatting
if %DURATIONH% LSS 10 set DURATIONH=0%DURATIONH%
if %DURATIONM% LSS 10 set DURATIONM=0%DURATIONM%
if %DURATIONS% LSS 10 set DURATIONS=0%DURATIONS%
if %DURATIONHS% LSS 10 set DURATIONHS=0%DURATIONHS%
rem outputing
echo STARTTIME: %STARTTIME% centiseconds
echo ENDTIME: %ENDTIME% centiseconds
echo DURATION: %DURATION% in centiseconds
echo %DURATIONH%:%DURATIONM%:%DURATIONS%,%DURATIONHS%
endlocal
goto :EOF
let urlString = "http://heyhttp.org/me.json"
var request = URLRequest(url: URL(string: urlString)!)
let session = URLSession.shared
session.dataTask(with: request) {data, response, error in
if error != nil {
print(error!.localizedDescription)
return
}
do {
let jsonResult: NSDictionary? = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as? NSDictionary
print("Synchronous\(jsonResult)")
} catch {
print(error.localizedDescription)
}
}.resume()
You can insert into a table from a SELECT.
INSERT INTO
Employee (emp_id, emp_name, emp_address, emp_state, emp_position, emp_manager)
SELECT
001,
'John Doe',
'1 River Walk, Green Street',
(SELECT id FROM state WHERE name = 'New York'),
(SELECT id FROM positions WHERE name = 'Sales Executive'),
(SELECT id FROM manager WHERE name = 'Barry Green')
FROM
dual
Or, similarly...
INSERT INTO
Employee (emp_id, emp_name, emp_address, emp_state, emp_position, emp_manager)
SELECT
001,
'John Doe',
'1 River Walk, Green Street',
state.id,
positions.id,
manager.id
FROM
state
CROSS JOIN
positions
CROSS JOIN
manager
WHERE
state.name = 'New York'
AND positions.name = 'Sales Executive'
AND manager.name = 'Barry Green'
Though this one does assume that all the look-ups exist. If, for example, there is no position name 'Sales Executive', nothing would get inserted with this version.
In plain JavaScript,
if (document.layers) {
document.captureEvents(Event.KEYDOWN);
}
document.onkeydown = function (evt) {
var keyCode = evt ? (evt.which ? evt.which : evt.keyCode) : event.keyCode;
if (keyCode == 13) {
// For Enter.
// Your function here.
}
if (keyCode == 27) {
// For Escape.
// Your function here.
} else {
return true;
}
};
I noticed that the reply is given in jQuery only, so I thought of giving something in plain JavaScript as well.
Here is another example - https://play.golang.org/p/9P-LmSkUMKY
package main
import (
"fmt"
)
func callOut() int {
fmt.Println("Outside is beinge executed")
return 1
}
var test = callOut()
func init() {
fmt.Println("Init3 is being executed")
}
func init() {
fmt.Println("Init is being executed")
}
func init() {
fmt.Println("Init2 is being executed")
}
func main() {
fmt.Println("Do your thing !")
}
Output of the above program
$ go run init/init.go
Outside is being executed
Init3 is being executed
Init is being executed
Init2 is being executed
Do your thing !
I've had this same problem, and I wrote a one-liner in shell to do it.
rm -rf $(mvn help:evaluate -Dexpression=settings.localRepository\
-Dorg.slf4j.simpleLogger.defaultLogLevel=WARN -B \
-Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn | grep -vF '[INFO]')/*
I did it as a one-liner because I wanted to have a Jenkins-project to simply run this whenever I needed, so I wouldn't have to log on to stuff, etc. If you allow yourself a shell-script for it, you can write it cleaner:
#!/usr/bin/env bash
REPOSITORY=$(mvn help:evaluate \
-Dexpression=settings.localRepository \
-Dorg.slf4j.simpleLogger.defaultLogLevel=WARN \
-Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn \
--batch-mode \
| grep -vF '[INFO]')
rm -rf $REPOSITORY/*
Should work, but I have not tested all of that script. (I've tested the first command, but not the whole script.) This approach has the downside of running a large complicated command first. It is idempotent, so you can test it out for yourself. The deletion is its own command afterwards, and this lets you try it all out and check that it does what you think it does, because you shouldn't trust deletion commands without verification. However, it is smart for one good reason: It's portable. It respects your settings.xml file. If you're running this command, and tell maven to use a specific xml file (the -s or --settings argument), this will still work. So you don't have to fiddle with making sure everything is the same everywhere.
It's a bit wieldy, but it's a decent way of doing business, IMO.
Insertion sort takes time O(n + the number of inversions).
An inversion is a pair (i, j)
such that i < j && a[i] > a[j]
. That is, an out-of-order pair.
One measure of being "almost sorted" is the number of inversions---one could take "almost sorted data" to mean data with few inversions. If one knows the number of inversions to be linear (for instance, you have just appended O(1) elements to a sorted list), insertion sort takes O(n) time.
Simplest way is to use PHPMailer and Gmail SMTP. The configuration would be like the below.
require 'PHPMailer/PHPMailerAutoload.php';
$mail = new PHPMailer;
$mail->isSMTP();
$mail->Host = 'smtp.gmail.com';
$mail->SMTPAuth = true;
$mail->Username = 'Email Address';
$mail->Password = 'Email Account Password';
$mail->SMTPSecure = 'tls';
$mail->Port = 587;
Example script and full source code can be found from here - How to Send Email from Localhost in PHP
For Python 2 my choice is:
print >> sys.stderr, 'spam'
Because you can simply print lists/dicts etc. without convert it to string.
print >> sys.stderr, {'spam': 'spam'}
instead of:
sys.stderr.write(str({'spam': 'spam'}))
I'm not entirely sure but I think you are probably surprised at how arrays are serialized in JSON. Let's isolate the problem. Consider following code:
var display = Array();
display[0] = "none";
display[1] = "block";
display[2] = "none";
console.log( JSON.stringify(display) );
This will print:
["none","block","none"]
This is how JSON actually serializes array. However what you want to see is something like:
{"0":"none","1":"block","2":"none"}
To get this format you want to serialize object, not array. So let's rewrite above code like this:
var display2 = {};
display2["0"] = "none";
display2["1"] = "block";
display2["2"] = "none";
console.log( JSON.stringify(display2) );
This will print in the format you want.
You can play around with this here: http://jsbin.com/oDuhINAG/1/edit?js,console
You can not post to Facebook walls automatically without creating an application and using the templated feed publisher as Frank pointed out.
The only thing you can do is use the 'share' widgets that they provide, which require user interaction.
just add your <script src="./custom.js"></script>
before </bod>
tag. that is supply time to d3.select(#chart)
detect your #chart
element in html body
you can try this
ts_create
TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
ts_update
TIMESTAMP DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP
Depending on what you mean with "ASCII character" you could simply try:
xxx.+xxx
1.1 Create Dump from SVN (Subversion) repository
svnadmin dump /path/to/reponame > /path/to/reponame.dump
Real example
svnadmin dump /var/www/svn/testrepo > /backups/testrepo.dump
1.2 Gzip Created Dump
gzip -9 /path/to/reponame.dump
Real example
gzip -9 /backups/testrepo.dump
1.3 SVN Dump and Gzip Dump with One-liner
svnadmin dump /path/to/reponame | gzip -9 > /path/to/reponame.dump.gz
Real example
svnadmin dump /var/www/svn/testrepo |Â gzip -9 > /backups/testrepo.dump.gz
How to Backup (dump) and Restore (load) SVN (Subversion) repository on Linux.
Ref: svn subversion backup andrestore
I noticed that if you have divisions it rounds off to integer, it would be better to use:
c=float(max(a1,...,an))/b
Sorry for the late post!
git remote add coworker git://path/to/coworkers/repo.git
git fetch coworker
git checkout --track coworker/foo
This will setup a local branch foo
, tracking the remote branch coworker/foo
. So when your co-worker has made some changes, you can easily pull them:
git checkout foo
git pull
Response to comments:
Cool :) And if I'd like to make my own changes to that branch, should I create a second local branch "bar" from "foo" and work there instead of directly on my "foo"?
You don't need to create a new branch, even though I recommend it. You might as well commit directly to foo
and have your co-worker pull your branch. But that branch already exists and your branch foo
need to be setup as an upstream branch to it:
git branch --set-upstream foo colin/foo
assuming colin
is your repository (a remote to your co-workers repository) defined in similar way:
git remote add colin git://path/to/colins/repo.git
You can transfer those (simply by adding a remote to a GitHub repo and by pushing them)
git remote add github https://[email protected]/yourLogin/yourRepoName.git
git push --mirror github
The history will be the same.
But you will loose the access control (teams defined in GitLab with specific access rights on your repo)
If you facing any issue with the https URL of the GitHub repo:
The requested URL returned an error: 403
All you need to do is to enter your GitHub password, but the OP suggests:
Then you might need to push it the ssh way. You can read more on how to do it here.
See "Pushing to Git returning Error Code 403 fatal: HTTP request failed".
You should be using @RequestParam
instead of @ModelAttribute
, e.g.
@RequestMapping("/{someID}")
public @ResponseBody int getAttr(@PathVariable(value="someID") String id,
@RequestParam String someAttr) {
}
You can even omit @RequestParam
altogether if you choose, and Spring will assume that's what it is:
@RequestMapping("/{someID}")
public @ResponseBody int getAttr(@PathVariable(value="someID") String id,
String someAttr) {
}
This can happen with symlinks sometimes. If you experience this issue and you know you are in an existing directory, but your symlink may have changed, you can use this command:
cd $(pwd)
The simplest and best solution is just to use XMLRoot attribute in your class, in which you wish to deserialize.
Like:
[XmlRoot(ElementName = "YourPreferableNameHere")]
public class MyClass{
...
}
Also, use the following Assembly :
using System.Xml.Serialization;
It seems that one of the most common reasons this happens is if you install a new version of PostgreSQL without stopping the service of an existing installation. This was a particular headache of mine, too. Before installing or upgrading, particularly on OS X and using the one click installer from Enterprise DB, make sure you check the status of the old installation before proceeding.
This seems like a lot less trouble to me:
var usageList = usageArray.ToList();
usageList.Add("newstuff");
usageArray = usageList.ToArray();
Basically you need following things to make location detector android app
Now if you write each of these module yourself then it needs much time and efforts. So it would be better to use ready resources that are being maintained already.
Using all these resources, you will be able to create an flawless android location detection app.
You will first need to listen for current location of user. You can use any of below libraries to quick start.
This library provide last known location, location updates
With this library you just need to provide a Configuration object with your requirements, and you will receive a location or a fail reason with all the stuff are described above handled.
Use this open source repo of the Hypertrack Live app to build live location sharing experience within your app within a few hours. HyperTrack Live app helps you share your Live Location with friends and family through your favorite messaging app when you are on the way to meet up. HyperTrack Live uses HyperTrack APIs and SDKs.
Google Maps Android API utility library
If you want to add route maps feature in your apps you can use DrawRouteMaps to make you work more easier. This is lib will help you to draw route maps between two point LatLng.
Simple, smooth animation for route / polylines on google maps using projections. (WIP)
This project allows you to calculate the direction between two locations and display the route on a Google Map using the Google Directions API.
There is no selector in CSS which does this. Attribute selectors match attribute values, not computed values.
You would have to use JavaScript.
(A "bit" late, but this hasn't been mentioned at all)
You didn't specify your DBMS.
In standard SQL (and most modern DBMS like Oracle, PostgreSQL, DB2, Firebird, Apache Derby, HSQLDB and H2) you can specify NULLS LAST
or NULLS FIRST
:
Use NULLS LAST
to sort them to the end:
select *
from some_table
order by some_column DESC NULLS LAST
If it's a DNS problem, you could try:
If this doesn't fix it, you could try editing the hosts file located here:
C:\Windows\System32\drivers\etc\hosts
And ensure that this line (and no other line referencing localhost) is in there:
127.0.0.1 localhost
var ids = [];
$(document).ready(function($) {
$(".color_cell").bind('click', function() {
alert('Test');
ids.push(this.id);
});
});
Kind of backward way, but without exec/system:
file_put_contents("testFile", "test");
$user = fileowner("testFile");
unlink("testFile");
If you create a file, the owner will be the PHP user.
This could also likely be run with any of the temporary file functions such as tempnam()
, which creates a random file in the temporary directory and returns the name of that file. If there are issues due to something like the permissions, open_basedir
or safe mode that prevent writing a file, typically, the temp directory will still be allowed.
"Lazy loading" means that an entity will be loaded only when you actually accesses the entity for the first time.
The pattern is like this:
public Entity getEntity() {
if (entity == null) {
entity = loadEntity();
}
return entity;
}
This saves the cost of preloading/prefilling all the entities in a large dataset beforehand while you after all actually don't need all of them.
In Hibernate, you can configure to lazily load a collection of child entities. The actual lazy loading is then done inside the methods of the PersistentSet
which Hibernate uses "under the hoods" to assign the collection of entities as Set
.
E.g.
public class Parent {
private Set<Child> children;
public Set<Child> getChildren() {
return children;
}
}
.
public void doSomething() {
Set<Child> children = parent.getChildren(); // Still contains nothing.
// Whenever you call one of the following (indirectly),
// Hibernate will start to actually load and fill the set.
children.size();
children.iterator();
}
In my case the error occurred inside a Fragment
on this line:
Intent intent = new Intent(getActivity(), SecondaryActivity.class);
It happened when I double clicked on an item which triggered the code above so two SecondaryActivity.class
activities were launched at the same time, one on top of the other. I closed the top SecondaryActivity.class
activity by pressing back button which triggered a call to getActivity()
in the SecondaryActivity.class
which came to foreground. The call to getActivity()
returned null
.
It's some kind of weird Android bug so it usually should not happen.
You can block the clicks after the user clicked once.
EDIT: updated code in order to reflect changes made to the way pipes work in more recent versions of RXJS. All operators (take in my example) are now wrapped into the pipe() operator.
I realize that this Question was quite a while ago and you surely have a proper solution by now, but for anyone looking for this I would suggest solving it with a Promise to keep the async pattern.
A more verbose version would be creating a new Promise:
function getValueFromObservable() {
return new Promise(resolve=>{
this.store.pipe(
take(1) //useful if you need the data once and don't want to manually cancel the subscription again
)
.subscribe(
(data:any) => {
console.log(data);
resolve(data);
})
})
}
On the receiving end you will then have "wait" for the promise to resolve with something like this:
getValueFromObservable()
.then((data:any)=>{
//... continue with anything depending on "data" after the Promise has resolved
})
A slimmer solution would be using RxJS' .toPromise() instead:
function getValueFromObservable() {
return this.store.pipe(take(1))
.toPromise()
}
The receiving side stays the same as above of course.
var result = nullableproperty ?? defaultvalue;
The ??
(null-coalescing operator) means if the first argument is null
, return the second one instead.
Try this :
<style type="text/css">
.myTableStyle
{
position:absolute;
top:50%;
left:50%;
/*Alternatively you could use: */
/*
position: fixed;
bottom: 50%;
right: 50%;
*/
}
</style>
Non-standard function, but its implemented on most common compilers:
int input = MY_VALUE;
char buffer[100] = {0};
int number_base = 10;
std::string output = itoa(input, buffer, number_base);
Update
C++11 introduced several std::to_string
overloads (note that it defaults to base-10).
I have been trying out the different packages including the function:
install.packages ("prettyR")
library (prettyR)
delimit.table (Corrvar,"Name the csv.csv")
## Corrvar
is a name of an object from an output I had on scaled variables to run a regression.
However I tried this same code for an output from another analysis (occupancy models model selection output) and it did not work. And after many attempts and exploration I:
In the "Data" vignette, click on "Text to column"
Select Delimited option, click next
Tick space box in "Separator", click next
Click Finalize (End)
Your output now should be in a form you can manipulate easy in excel. So perhaps not the fanciest option but it does the trick if you just want to explore your data in another way.
PS. If the labels in excel are not the exact one it is because Im translating the lables from my spanish excel.
As I was facing the exact same issue, and my googling kept giving me nothing, I think I found a workaround. Here's what I did, it seems to work for me, but as I'm stuck with an old version of SVN (< 1.5, as it doesn't have the --keep-local option) and I'm no expert of it, I can't be sure it's an universal solution. If it works for you too, please let me know !
I was dealing with a Prestashop install I got from SVN, since other people had already started working on it. Since the DB settings were done for another server, I changed them in some file in the /config folder. As this folder was already versioned, setting it in svn:ignore would not prevent my local modifications on it from being committed. Here's what I did :
cp config ../cfg_bkp # copy the files out of the repo
svn rm config # delete files both from svn and "physically"
svn propset svn:ignore "config" . # as the files no longer exists, I can add my ignore rule and then...
mv ../cfg_bkp config # ...bring'em back
svn revert --recursive config # make svn forget any existing status for the files (they won't be up for deletion anymore)
Now I can run svn add --force . at the repo root without adding my config, even if it's not matching the repo's version (I guess I would have to go through all this again if I modified it one more time, did not test). I can svn update as well without having my files being overwritten or getting any error.
That's a known issue. Currently you have to use a workaround like shown in your question.
This is working as intended. When the change event is emitted ngModelChange
(the (...)
part of [(ngModel)]
hasn't updated the bound model yet:
<input type="checkbox" (ngModelChange)="myModel=$event" [ngModel]="mymodel">
See also
There is a better way of checking radios and checkbox; you have to pass an array of values to the val method instead of a raw value
Note: If you simply pass the value by itself (without being inside an array), that will result in all values of "mygroup" being set to the value.
$("input[name=mygroup]").val([5]);
Here is the jQuery doc that explains how it works: http://api.jquery.com/val/#val-value
And .val([...])
also works with form elements like <input type="checkbox">
, <input type="radio">
, and <option>
s inside of a <select>
.
The inputs and the options having a value that matches one of the elements of the array will be checked or selected, while those having a value that don't match one of the elements of the array will be unchecked or unselected
Fiddle demonstrating this working: https://jsfiddle.net/92nekvp3/
just came across while browsing, might help you javascript-getting-and-setting-caret-position-in-textarea
. You can use it for textbox also.
For graphical elements that are purely decorative, set their respective android:contentDescription XML attributes to "@null".
If your app only supports devices running Android 4.1 (API level 16) or higher, you can instead set these elements' android:importantForAccessibility XML attributes to "no"
The thing to understand here is that:
The constructor ViewClassName(Context context, AttributeSet attrs )
is called when inflating the customView via xml.
You see you are not using the new keyword to instantiate your object i.e. you are not doing new GhostSurfaceCameraView()
. Doing this you are calling the first constructor i.e. public View (Context context)
.
Whereas when inflating view from XML, i.e. when using setContentView(R.layout.ghostviewscreen);
or using findViewById
, you, NO, not you!, the android system calls the ViewClassName(Context context, AttributeSet attrs )
constructor.
This is clear when reading the documentation : "Constructor that is called when inflating a view from XML." See: https://developer.android.com/reference/android/view/View.html#View(android.content.Context,%20android.util.AttributeSet)
Hence, never forget basic polymorphism and never forget reading through the documentation. It saves a ton of headache.
Why don't you simply use the size()
method on your Collection
to get the number of elements?
Iterator
is just meant to iterate,nothing else.
typeof(Controller).Assembly.GetName().Version
Gives the current version programmatically.
First, note that the question presents an incorrect initialization of an aware datetime object:
>>> local_time=datetime.datetime(2010, 4, 27, 12, 0, 0, 0,
... tzinfo=pytz.timezone('Israel'))
creates an invalid instance. One can see the problem by computing the UTC offset of the resulting object:
>>> print(local_time.utcoffset())
2:21:00
(Note the result which is an odd fraction of an hour.)
To initialize an aware datetime properly using pytz one should use the localize()
method as follows:
>>> local_time=pytz.timezone('Israel').localize(datetime.datetime(2010, 4, 27, 12))
>>> print(local_time.utcoffset())
3:00:00
Now, if you require a local pytz timezone as the new tzinfo, you should use the tzlocal package as others have explained, but if all you need is an instance with a correct local time zone offset and abbreviation then tarting with Python 3.3, you can call the astimezone()
method with no arguments to convert an aware datetime
instance to your local timezone:
>>> local_time.astimezone().strftime('%Y-%m-%d %H:%M %Z %z')
'2010-04-27 05:00 EDT -0400'
Boost contains cstdint.hpp header file with the types you are looking for: http://www.boost.org/doc/libs/1_36_0/boost/cstdint.hpp
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
if (![NSStringFromClass([keyWindow class]) isEqualToString:@"UIWindow"]) {
NSArray *windows = [UIApplication sharedApplication].windows;
for (UIWindow *window in windows) {
if ([NSStringFromClass([window class]) isEqualToString:@"UIWindow"]) {
keyWindow = window;
break;
}
}
}
to_skip = ("bad", "naughty")
out_handle = open("testout", "w")
with open("testin", "r") as handle:
for line in handle:
if set(line.split(" ")).intersection(to_skip):
continue
out_handle.write(line)
out_handle.close()
Once I changed Options -Index
to Options +Index
in my conf file, I removed the welcome page and restarted services.
$ sudo rm -f /etc/httpd/conf.d/welcome.conf
$ sudo service httpd restart
I was able to see directory listings after that.
I could care less about IE6, as long as it works in IE8, Firefox 4, and Safari 5
This makes me happy.
Try this: Live Demo
display: table
is surprisingly good. Once you don't care about IE7, you're free to use it. It doesn't really have any of the usual downsides of <table>
.
CSS:
#container {
background: #ccc;
display: table
}
#left, #right {
display: table-cell
}
#left {
width: 150px;
background: #f0f;
border: 5px dotted blue;
}
#right {
background: #aaa;
border: 3px solid #000
}
The best way I have found to manage keyboard input on a Windows Forms form is to process it after the keystroke and before the focused control receives the event. Microsoft maintains a built-in Form
-level property named .KeyPreview to facilitate this precise thing:
public frmForm()
{
// ...
frmForm.KeyPreview = true;
// ...
}
Then the form's _KeyDown, _KeyPress, and / or _KeyUp events can be marshaled to access input events before the focused form control ever sees them, and you can apply handler logic to capture the event there or allow it to pass through to the focused form control.
Although not as structurally graceful as XAML's event-routing architecture, it makes management of form-level functions in Winforms far simpler. See the MSDN notes on KeyPreview for caveats.
How about just chaining the greps?
grep -n 'loom' ~/projects/**/trunk/src/**/*.@(h|cpp) | grep -v 'gloom'
I got this error while loading data when using docker[1]. The solution worked after I followed these next steps. Initially, I created the database and table datavault
and fdata
. When I tried to import the data[2], I got the error[3]. Then I did:
SET GLOBAL local_infile = 1;
SHOW VARIABLES LIKE 'local_infile';
mysql -P 3306 -u required --local-infile=1 -p
, see [4] for user creation.use datavault;
drop table fdata;
CREATE TABLE fdata (fID INT, NAME VARCHAR(64), LASTNAME VARCHAR(64), EMAIL VARCHAR(128), GENDER VARCHAR(12), IPADDRESS VARCHAR(40));
For completeness, I would add I was running the mysql version inside the container via docker exec -it testdb sh
. The mysql version was mysql Ver 8.0.17 for Linux on x86_64 (MySQL Community Server - GPL). This was also tested with mysql.exe Ver 14.14 Distrib 5.7.14, for Win64 (x86_64) which was another version of mysql from WAMP64. The associated commands used are listed in [5].
[1] docker run --name testdb -v //c/Users/C/Downloads/data/csv-data/:/var/data -p 3306 -e MYSQL_ROOT_PASSWORD=password -d mysql:latest
[2] load data local infile '/var/data/mockdata.csv' into table fdata fields terminated by ',' enclosed by '' lines terminated by '\n' IGNORE 1 ROWS;
[3] ERROR 1148 (42000): The used command is not allowed with this MySQL version
[4] The required client was created using:
CREATE USER 'required'@'%' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON * . * TO 'required'@'%';
FLUSH PRIVILEGES;
ALTER USER 'required'@'%' IDENTIFIED WITH mysql_native_password BY 'password';
if you run into this error: Authentication plugin ‘caching_sha2_password’ cannot be loaded
[5] Commands using mysql from WAMP64:
mysql -urequired -ppassword -P 32775 -h 192.168.99.100 --local-infile=1
where the port is thee mapped port into the host as described by docker ps -a
and the host ip was optained using docker-machine ip
(This depends on OS and possibly Docker version).load data local infile 'c:/Users/C/Downloads/data/csv-data/mockdata.csv' into table fdata fields terminated by ',' enclosed by '' lines terminated by '\n';
mysql -urequired -ppassword -P 32775 -h 192.168.99.100 --local-infile datavault3 -e "LOAD DATA LOCAL INFILE 'c:/Users/C/Downloads/data/csv-data/mockdata.csv' REPLACE INTO TABLE fdata FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' IGNORE 1 ROWS"
and it successfully loaded the data easily checked after running select * from fdata limit 10;
.The clean way to use mbstowcs
is to call it twice to find the length of the result:
const char * cs = <your input char*>
size_t wn = mbsrtowcs(NULL, &cs, 0, NULL);
// error if wn == size_t(-1)
wchar_t * buf = new wchar_t[wn + 1](); // value-initialize to 0 (see below)
wn = mbsrtowcs(buf, &cs, wn + 1, NULL);
// error if wn == size_t(-1)
assert(cs == NULL); // successful conversion
// result now in buf, return e.g. as std::wstring
delete[] buf;
Don't forget to call setlocale(LC_CTYPE, "");
at the beginning of your program!
The advantage over the Windows MultiByteToWideChar
is that this is entirely standard C, although on Windows you might prefer the Windows API function anyway.
I usually wrap this method, along with the opposite one, in two conversion functions string
->wstring
and wstring
->string
. If you also add trivial overloads string
->string
and wstring
->wstring
, you can easily write code that compiles with the Winapi TCHAR
typedef in any setting.
[Edit:] I added zero-initialization to buf
, in case you plan to use the C array directly. I would usually return the result as std::wstring(buf, wn)
, though, but do beware if you plan on using C-style null-terminated arrays.[/]
In a multithreaded environment you should pass a thread-local conversion state to the function as its final (currently invisible) parameter.
Here is a small rant of mine on this topic.
Use as follows
[profilename]
region=us-east-1
output=text
Example cmd
aws --profile myname CMD opts
You can directly use
var message = $.trim($("#message").val());
Read more @ Get the Value of TextArea using the jQuery Val () Method
Use System.IO.File.Delete like so:
System.IO.File.Delete(@"C:\test.txt")
From the documentation:
If the file to be deleted does not exist, no exception is thrown.
As of now (studio 0.61) maintaining proper project structure is enough. No need to create separate test project as in eclipse (see below).
Yes. You can use reflection. Something like this:
Type thisType = this.GetType();
MethodInfo theMethod = thisType.GetMethod(TheCommandString);
theMethod.Invoke(this, userParameters);
I need this so often that I created a function in my ~/.bashrc
file:
chmodf() {
find $2 -type f -exec chmod $1 {} \;
}
chmodd() {
find $2 -type d -exec chmod $1 {} \;
}
Now I can use these shortcuts:
chmodd 0775 .
chmodf 0664 .
This happens when you index a row/column with a number that is larger than the dimensions of your dataframe
. For instance, getting the eleventh column when you have only three.
import pandas as pd
df = pd.DataFrame({'Name': ['Mark', 'Laura', 'Adam', 'Roger', 'Anna'],
'City': ['Lisbon', 'Montreal', 'Lisbon', 'Berlin', 'Glasgow'],
'Car': ['Tesla', 'Audi', 'Porsche', 'Ford', 'Honda']})
You have 5 rows and three columns:
Name City Car
0 Mark Lisbon Tesla
1 Laura Montreal Audi
2 Adam Lisbon Porsche
3 Roger Berlin Ford
4 Anna Glasgow Honda
Let's try to index the eleventh column (it doesn't exist):
df.iloc[:, 10] # there is obviously no 11th column
IndexError: single positional indexer is out-of-bounds
If you are a beginner with Python, remember that df.iloc[:, 10]
would refer to the eleventh column.
Here is an elegant way to do similar thing. But why do partly JSON unmarshal? That doesn't make sense.
Look below at the working code. Copy and paste it.
import (
"bytes"
"encoding/json" // Encoding and Decoding Package
"fmt"
)
var messeging = `{
"say":"Hello",
"sendMsg":{
"user":"ANisus",
"msg":"Trying to send a message"
}
}`
type SendMsg struct {
User string `json:"user"`
Msg string `json:"msg"`
}
type Chat struct {
Say string `json:"say"`
SendMsg *SendMsg `json:"sendMsg"`
}
func main() {
/** Clean way to solve Json Decoding in Go */
/** Excellent solution */
var chat Chat
r := bytes.NewReader([]byte(messeging))
chatErr := json.NewDecoder(r).Decode(&chat)
errHandler(chatErr)
fmt.Println(chat.Say)
fmt.Println(chat.SendMsg.User)
fmt.Println(chat.SendMsg.Msg)
}
func errHandler(err error) {
if err != nil {
fmt.Println(err)
return
}
}
You should logged in not as "root" user.
Or assign permission to your "current_user" to do this by using following command
sudo chown -R username.www-data /var/www
sudo chmod -R +rwx /var/www
No, there is no difference. But I prefer using int[] array
as it is more readable.
I constantly forget the names of the colors I want to use and keep coming back to this question =)
The previous answers are great, but I find it a bit difficult to get an overview of the available colors from the posted image. I prefer the colors to be grouped with similar colors, so I slightly tweaked the matplotlib answer that was mentioned in a comment above to get a color list sorted in columns. The order is not identical to how I would sort by eye, but I think it gives a good overview.
I updated the image and code to reflect that 'rebeccapurple' has been added and the three sage colors have been moved under the 'xkcd:' prefix since I posted this answer originally.
I really didn't change much from the matplotlib example, but here is the code for completeness.
import matplotlib.pyplot as plt
from matplotlib import colors as mcolors
colors = dict(mcolors.BASE_COLORS, **mcolors.CSS4_COLORS)
# Sort colors by hue, saturation, value and name.
by_hsv = sorted((tuple(mcolors.rgb_to_hsv(mcolors.to_rgba(color)[:3])), name)
for name, color in colors.items())
sorted_names = [name for hsv, name in by_hsv]
n = len(sorted_names)
ncols = 4
nrows = n // ncols
fig, ax = plt.subplots(figsize=(12, 10))
# Get height and width
X, Y = fig.get_dpi() * fig.get_size_inches()
h = Y / (nrows + 1)
w = X / ncols
for i, name in enumerate(sorted_names):
row = i % nrows
col = i // nrows
y = Y - (row * h) - h
xi_line = w * (col + 0.05)
xf_line = w * (col + 0.25)
xi_text = w * (col + 0.3)
ax.text(xi_text, y, name, fontsize=(h * 0.8),
horizontalalignment='left',
verticalalignment='center')
ax.hlines(y + h * 0.1, xi_line, xf_line,
color=colors[name], linewidth=(h * 0.8))
ax.set_xlim(0, X)
ax.set_ylim(0, Y)
ax.set_axis_off()
fig.subplots_adjust(left=0, right=1,
top=1, bottom=0,
hspace=0, wspace=0)
plt.show()
Updated 2017-10-25. I merged my previous updates into this section.
If you would like to use additional named colors when plotting with matplotlib, you can use the xkcd crowdsourced color names, via the 'xkcd:' prefix:
plt.plot([1,2], lw=4, c='xkcd:baby poop green')
Now you have access to a plethora of named colors!
The default Tableau colors are available in matplotlib via the 'tab:' prefix:
plt.plot([1,2], lw=4, c='tab:green')
There are ten distinct colors:
You can also plot colors by their HTML hex code:
plt.plot([1,2], lw=4, c='#8f9805')
This is more similar to specifying and RGB tuple rather than a named color (apart from the fact that the hex code is passed as a string), and I will not include an image of the 16 million colors you can choose from...
For more details, please refer to the matplotlib colors documentation and the source file specifying the available colors, _color_data.py
.
No one has provided a solution that would work cross-form. I know it wasn't specifically asked but I am working in a linux environment where most of the solutions (as at the time I post this) would provide an error.
Hardcoding path separators (as well as other things) will give an error in anything but Windows systems.
In my original solution I used:
char filesep = Path.DirectorySeparatorChar;
string datapath = $"..{filesep}..{filesep}";
However after seeing some of the answers here I adjusted it to be:
string datapath = Directory.GetParent(Directory.GetParent(Directory.GetCurrentDirectory()).FullName).FullName;
I know it's been eight years but I wanted to share this piece of code found in MRuby that shows how __declspec()
can bee used at the same level as the export keyword
.
/** Declare a public MRuby API function. */
#if defined(MRB_BUILD_AS_DLL)
#if defined(MRB_CORE) || defined(MRB_LIB)
# define MRB_API __declspec(dllexport)
#else
# define MRB_API __declspec(dllimport)
#endif
#else
# define MRB_API extern
#endif
I tried this out for transmitting continuous data (float values converted to string) from my PC (MATLAB) to my phone. But, still my App misreads the delimiter '\n' and still data gets garbled. So, I took the character 'N' as the delimiter rather than '\n' (it could be any character that doesn't occur as part of your data) and I've achieved better transmission speed - I gave just 0.1 seconds delay between transmitting successive samples - with more than 99% data integrity at the receiver i.e. out of 2000 samples (float values) that I transmitted, only 10 were not decoded properly in my application.
My answer in short is: Choose a delimiter other than '\r' or '\n' as these create more problems for real-time data transmission when compared to other characters like the one I've used. If we work more, may be we can increase the transmission rate even more. I hope my answer helps someone!
>>> any([False, False, False])
False
>>> any([False, True, False])
True
>>> all([False, True, True])
False
>>> all([True, True, True])
True
You have to realize that char[10]
is similar to a char*
(see comment by @DarkDust). You are in fact returning a pointer. Now the pointer points to a variable (str
) which is destroyed as soon as you exit the function, so the pointer points to... nothing!
Usually in C, you explicitly allocate memory in this case, which won't be destroyed when the function ends:
char* testfunc()
{
char* str = malloc(10 * sizeof(char));
return str;
}
Be aware though! The memory pointed at by str
is now never destroyed. If you don't take care of this, you get something that is known as a 'memory leak'. Be sure to free()
the memory after you are done with it:
foo = testfunc();
// Do something with your foo
free(foo);
I would suggest you check out the various tutorials that are coming out lately. My current fav is:
Hope this helps.
You should just grab the window by the title bar and snap it to the left side of your screen (close browser) then reopen the browser ans snap it to the top... problem is over.
Within Nano use Ctrl+O to save and Ctrl+X to exit if you were wondering
You will need to draw the item yourself. Change the DrawMode to OwnerDrawFixed and handle the DrawItem event.
/// <summary>
/// Handles the DrawItem event of the listBox1 control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Forms.DrawItemEventArgs"/> instance containing the event data.</param>
private void listBox1_DrawItem( object sender, DrawItemEventArgs e )
{
e.DrawBackground();
Graphics g = e.Graphics;
// draw the background color you want
// mine is set to olive, change it to whatever you want
g.FillRectangle( new SolidBrush( Color.Olive), e.Bounds );
// draw the text of the list item, not doing this will only show
// the background color
// you will need to get the text of item to display
g.DrawString( THE_LIST_ITEM_TEXT , e.Font, new SolidBrush( e.ForeColor ), new PointF( e.Bounds.X, e.Bounds.Y) );
e.DrawFocusRectangle();
}
You can still use map
if you can afford to create a makeshift array:
{
new Array(this.props.level).fill(0).map((_, index) => (
<span className='indent' key={index}></span>
))
}
This works because new Array(n).fill(x)
creates an array of size n
filled with x
, which can then aid map
.
In my case I wasn't getting error just the crash in the AppDelegate and I had to uncheck the next option: OS_ACTIVITY_MODE
then I could get the real crash reason in my .xib file
Hope this can help you too :)
There are different regex engines but I think most of them will work with this:
apple|banana
If corrupted tables remain after
mysqlcheck -A --auto-repair
try
mysqlcheck -A --auto-repair --use-frm
you can use the command reset
git reset --soft HEAD^1
then:
git reset <files>
git commit --amend
and
git push -f
I'm using xUnit so this is what I use:
Debugger.Log(0, "1", input);
PS: you can use Debugger.Break();
too, so you can see your log in out
.
This can be done elegantly with Ray, a system that allows you to easily parallelize and distribute your Python code.
To parallelize your example, you'd need to define your functions with the @ray.remote decorator
, and then invoke them with .remote
.
import ray
ray.init()
# Define functions you want to execute in parallel using
# the ray.remote decorator.
@ray.remote
def func1():
print("Working")
@ray.remote
def func2():
print("Working")
# Execute func1 and func2 in parallel.
ray.get([func1.remote(), func2.remote()])
If func1()
and func2()
return results, you need to rewrite the above code a bit, by replacing ray.get([func1.remote(), func2.remote()])
with:
ret_id1 = func1.remote()
ret_id2 = func1.remote()
ret1, ret2 = ray.get([ret_id1, ret_id2])
There are a number of advantages of using Ray over the multiprocessing module or using multithreading. In particular, the same code will run on a single machine as well as on a cluster of machines.
For more advantages of Ray see this related post.
I have read your problem, And i had the same problem. But af ter i changed some, my problem "Permission Denied" is solved.
Private Sub Addi_Click()
'On Error Resume Next
'call ds
browsers ("false")
Call makeAdir
ffgg = "C:\Users\Backups\user\" & User & "1\data\"
Set fs = CreateObject("Scripting.FileSystemObject")
Set f = fs.Getfolder("c:\users\Backups\user\" & User & "1\data")
f.Attributes = 0
Set fso = VBA.CreateObject("Scripting.FileSystemObject")
Call fso.Copyfile(filetarget, ffgg, True)
Look at ffgg = "C:\Users\Backups\user\" & User & "1\data\"
, Before I changed it was ffgg = "C:\Users\Backups\user\" & User & "1\data"
When i add backslash after "\data\"
, my problem is solved. Try to add back slash. Maybe solved your problem. Good luck.
You can't have multiple actions with the same name. You could add a parameter to one method and that would be valid. For example:
public ActionResult Index(int i)
{
Some Code--Some Code---Some Code
return View();
}
There are a few ways to do to have actions that differ only by request verb. My favorite and, I think, the easiest to implement is to use the AttributeRouting package. Once installed simply add an attribute to your method as follows:
[GET("Resources")]
public ActionResult Index()
{
return View();
}
[POST("Resources")]
public ActionResult Create()
{
return RedirectToAction("Index");
}
In the above example the methods have different names but the action name in both cases is "Resources". The only difference is the request verb.
The package can be installed using NuGet like this:
PM> Install-Package AttributeRouting
If you don't want the dependency on the AttributeRouting packages you could do this by writing a custom action selector attribute.
Use this for dirs (the /
after **
is needed in bash to limit it to directories):
ls -d -1 "$PWD/"**/
this for files and directories directly under the current directory, whose names contain a .
:
ls -d -1 "$PWD/"*.*
this for everything:
ls -d -1 "$PWD/"**/*
Taken from here http://www.zsh.org/mla/users/2002/msg00033.html
In bash, **
is recursive if you enable shopt -s globstar
.
std::map
takes up to four template type arguments, the third one being a comparator. E.g.:
struct cmpByStringLength {
bool operator()(const std::string& a, const std::string& b) const {
return a.length() < b.length();
}
};
// ...
std::map<std::string, std::string, cmpByStringLength> myMap;
Alternatively you could also pass a comparator to map
s constructor.
Note however that when comparing by length you can only have one string of each length in the map as a key.
Here is a link to another similar SO question, which has an answer pointing to this good article on "Reading, writing and photo metadata" in .Net.
Using CSS only, no. You need to use jQuery to add it.
Below is the simplest way
Try the code
ALTER TRIGGER trigger_name DISABLE
That's it :)
.newLine() is the best if your system property line.separator is proper . and sometime you don't want to change the property runtime . So alternative solution is appending \n
the percent should be relative to an absolute size, try this :
table {
width:200px;
}
td {
width:65%;
border:1px solid black;
}
_x000D_
<table>
<tr>
<td>Testasdas 3123 1 dasd as da</td>
<td>A long string blah blah blah</td>
</tr>
</table>
_x000D_
You should also be able to accomplish a similar thing using the premain method of a Java agent.
The manifest of the agent JAR file must contain the attribute Premain-Class. The value of this attribute is the name of the agent class. The agent class must implement a public static premain method similar in principle to the main application entry point. After the Java Virtual Machine (JVM) has initialized, each premain method will be called in the order the agents were specified, then the real application main method will be called. Each premain method must return in order for the startup sequence to proceed.
Yes, you can register a listener via setOnItemSelectedListener()
, as is demonstrated here.
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.util.Date"%>
<%@page import="java.util.Locale"%>
<html>
<head>
<title>Date Format</title>
</head>
<body>
<%
String stringDate = "Fri May 13 2011 19:59:09 GMT 0530";
Date stringDate1 = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss Z", Locale.ENGLISH).parse(stringDate);
String stringDate2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(stringDate1);
out.println(stringDate2);
%>
</body>
</html>
As I understand it, you want the server be able to send messages through from client 1 to client 2. You cannot directly connect two clients because one of the two ends of a WebSocket connection needs to be a server.
This is some pseudocodish JavaScript:
Client:
var websocket = new WebSocket("server address");
websocket.onmessage = function(str) {
console.log("Someone sent: ", str);
};
// Tell the server this is client 1 (swap for client 2 of course)
websocket.send(JSON.stringify({
id: "client1"
}));
// Tell the server we want to send something to the other client
websocket.send(JSON.stringify({
to: "client2",
data: "foo"
}));
Server:
var clients = {};
server.on("data", function(client, str) {
var obj = JSON.parse(str);
if("id" in obj) {
// New client, add it to the id/client object
clients[obj.id] = client;
} else {
// Send data to the client requested
clients[obj.to].send(obj.data);
}
});
The issue is with this line
xlo.Worksheets(1).Cells(2, 2) = TextBox1.Text
You have the textbox defined at some other location which you are not using here. Excel is unable to find the textbox object in the current sheet while this textbox was defined in xlw.
Hence replace this with
xlo.Worksheets(1).Cells(2, 2) = worksheets("xlw").TextBox1.Text
To use a MySQL AUTO_INCREMENT
column, you are supposed to use an IDENTITY
strategy:
@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
Which is what you'd get when using AUTO
with MySQL:
@Id @GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
Which is actually equivalent to
@Id @GeneratedValue
private Long id;
In other words, your mapping should work. But Hibernate should omit the id
column in the SQL insert statement, and it is not. There must be a kind of mismatch somewhere.
Did you specify a MySQL dialect in your Hibernate configuration (probably MySQL5InnoDBDialect
or MySQL5Dialect
depending on the engine you're using)?
Also, who created the table? Can you show the corresponding DDL?
Follow-up: I can't reproduce your problem. Using the code of your entity and your DDL, Hibernate generates the following (expected) SQL with MySQL:
insert
into
Operator
(active, password, username)
values
(?, ?, ?)
Note that the id
column is absent from the above statement, as expected.
To sum up, your code, the table definition and the dialect are correct and coherent, it should work. If it doesn't for you, maybe something is out of sync (do a clean build, double check the build directory, etc) or something else is just wrong (check the logs for anything suspicious).
Regarding the dialect, the only difference between MySQL5Dialect
or MySQL5InnoDBDialect
is that the later adds ENGINE=InnoDB
to the table objects when generating the DDL. Using one or the other doesn't change the generated SQL.
Instead of gdb
, run gdbtui
. Or run gdb
with the -tui
switch. Or press C-x C-a after entering gdb
. Now you're in GDB's TUI mode.
Enter layout asm
to make the upper window display assembly -- this will automatically follow your instruction pointer, although you can also change frames or scroll around while debugging. Press C-x s to enter SingleKey mode, where run continue up down finish
etc. are abbreviated to a single key, allowing you to walk through your program very quickly.
+---------------------------------------------------------------------------+ B+>|0x402670 <main> push %r15 | |0x402672 <main+2> mov %edi,%r15d | |0x402675 <main+5> push %r14 | |0x402677 <main+7> push %r13 | |0x402679 <main+9> mov %rsi,%r13 | |0x40267c <main+12> push %r12 | |0x40267e <main+14> push %rbp | |0x40267f <main+15> push %rbx | |0x402680 <main+16> sub $0x438,%rsp | |0x402687 <main+23> mov (%rsi),%rdi | |0x40268a <main+26> movq $0x402a10,0x400(%rsp) | |0x402696 <main+38> movq $0x0,0x408(%rsp) | |0x4026a2 <main+50> movq $0x402510,0x410(%rsp) | +---------------------------------------------------------------------------+ child process 21518 In: main Line: ?? PC: 0x402670 (gdb) file /opt/j64-602/bin/jconsole Reading symbols from /opt/j64-602/bin/jconsole...done. (no debugging symbols found)...done. (gdb) layout asm (gdb) start (gdb)
Simple!
System.IO.File.WriteAllText(path, text, Encoding.GetEncoding(28591));
Another way to understand the relationship between these concepts is to interpret a ROLE as a container of Authorities.
Authorities are fine-grained permissions targeting a specific action coupled sometimes with specific data scope or context. For instance, Read, Write, Manage, can represent various levels of permissions to a given scope of information.
Also, authorities are enforced deep in the processing flow of a request while ROLE are filtered by request filter way before reaching the Controller. Best practices prescribe implementing the authorities enforcement past the Controller in the business layer.
On the other hand, ROLES are coarse grained representation of an set of permissions. A ROLE_READER would only have Read or View authority while a ROLE_EDITOR would have both Read and Write. Roles are mainly used for a first screening at the outskirt of the request processing such as http. ... .antMatcher(...).hasRole(ROLE_MANAGER)
The Authorities being enforced deep in the request's process flow allows a finer grained application of the permission. For instance, a user may have Read Write permission to first level a resource but only Read to a sub-resource. Having a ROLE_READER would restrain his right to edit the first level resource as he needs the Write permission to edit this resource but a @PreAuthorize interceptor could block his tentative to edit the sub-resource.
Jake
If you use a static key, encrypt and decrypt always give the same result;
public static final String CRYPTOR_KEY = "your static key here";
byte[] keyByte = Base64.getDecoder().decode(CRYPTOR_KEY);
key = new SecretKeySpec(keyByte, "AES");
If you want to format it with manually set symbols, use this:
DecimalFormatSymbols decimalFormatSymbols = new DecimalFormatSymbols();
decimalFormatSymbols.setDecimalSeparator('.');
decimalFormatSymbols.setGroupingSeparator(',');
DecimalFormat decimalFormat = new DecimalFormat("#,##0.00", decimalFormatSymbols);
System.out.println(decimalFormat.format(1237516.2548)); //1,237,516.25
Locale-based formatting is preferred, though.
finally done with
GROUP BY
DATEPART(YEAR, DT.[Date]),
DATEPART(MONTH, DT.[Date]),
DATEPART(DAY, DT.[Date]),
DATEPART(HOUR, DT.[Date]),
(DATEPART(MINUTE, DT.[Date]) / 10)
First of all to see how many revisions you are behind locally, you should do a git fetch
to make sure you have the latest info from your remote.
The default output of git status
tells you how many revisions you are ahead or behind, but usually I find this too verbose:
$ git status
# On branch master
# Your branch and 'origin/master' have diverged,
# and have 2 and 1 different commit each, respectively.
#
nothing to commit (working directory clean)
I prefer git status -sb
:
$ git status -sb
## master...origin/master [ahead 2, behind 1]
In fact I alias this to simply git s
, and this is the main command I use for checking status.
To see the diff in the "ahead revisions" of master
, I can exclude the "behind revisions" from origin/master
:
git diff master..origin/master^
To see the diff in the "behind revisions" of origin/master
, I can exclude the "ahead revisions" from master
:
git diff origin/master..master^^
If there are 5 revisions ahead or behind it might be easier to write like this:
git diff master..origin/master~5
git diff origin/master..master~5
UPDATE
To see the ahead/behind revisions, the branch must be configured to track another branch. For me this is the default behavior when I clone a remote repository, and after I push a branch with git push -u remotename branchname
. My version is 1.8.4.3, but it's been working like this as long as I remember.
As of version 1.8, you can set the tracking branch like this:
git branch --track test-branch
As of version 1.7, the syntax was different:
git branch --set-upstream test-branch
Error 1215 is an annoying one. Explosion Pill's answer covers the basics. You want to make sure to start from there. However, there are more, much more subtle cases to look out for:
For example, when you try to link up PRIMARY KEYs of different tables, make sure to provide proper ON UPDATE
and ON DELETE
options. E.g.:
...
PRIMARY KEY (`id`),
FOREIGN KEY (`id`) REFERENCES `t` (`other_id`) ON DELETE SET NULL
....
won't fly, because PRIMARY KEYs (such as id
) can't be NULL
.
I am sure, there are even more, similarly subtle issues when adding these sort of constraints, which is why when coming across constraint errors, always make sure that the constraints and their implications make sense in your current context. Good luck with your error 1215!
It is very inefficient to store all values in memory, so the objects are reused and loaded one at a time. See this other SO question for a good explanation. Summary:
[...] when looping through the
Iterable
value list, each Object instance is re-used, so it only keeps one instance around at a given time.
This XPath is specific to the code snippet you've provided. To select <child>
with id as #grand
you can write //child[@id='#grand']
.
To get age //child[@id='#grand']/@age
Hope this helps
I could think of two following possibilities:
As others have already pointed out, the program might chdir()
. Is the user running the program allowed to write into the directory it chdir()
'ed to? If not, it cannot create the core dump.
For some weird reason the core dump isn't named core.*
You can check /proc/sys/kernel/core_pattern
for that. Also, the find command you named wouldn't find a typical core dump. You should use find / -name "*core.*"
, as the typical name of the coredump is core.$PID
You can set string limit as below example:
<td>{{str_limit($biodata ->description, $limit = 20, $end = '...')}}</td>
It will display only the 20 letters including whitespaces and ends with ....
[-a-z0-9]+,[a-z0-9-]+,[a-z-0-9]+ and also [a-z-0-9]+ all are same.The hyphen between two ranges considered as a symbol.And also [a-z0-9-+()]+ this regex allow hyphen.
Here is the simplest example that has the key lines of code:
import numpy as np
import matplotlib.pyplot as plt
H = np.array([[1, 2, 3, 4],
[5, 6, 7, 8],
[9, 10, 11, 12],
[13, 14, 15, 16]])
plt.imshow(H, interpolation='none')
plt.show()
Increase the font-size of glyphicon
to increase all icons size.
.glyphicon {
font-size: 50px;
}
To target only one icon,
.glyphicon.glyphicon-globe {
font-size: 75px;
}
Also defragment your disk. Netbeans is very aggressive about creating caches of one form or another. Most of them get persisted to disk at some point or another which can affect startup time. Virus scanners (Symantec in particular), Desktop search engines, and any other intrusive I/O product can drastically reduce performance.
I have noticed that Netbeans can be tempermental at times and its performance can vary greatly between two machines with nearly identical specs. My work machine has terrible performance and is unusable at times, but it's lightning fast when I use it on my home machine (with bigger projects in many cases).
Just to clarify in complete detail. This is what works with the current version of jQuery Ui
$( "#tabs" ).tabs( "option", "active", # );
where # is the index of the tab you want to make active.
dtype('O')
inside dataframe this means Pandas string.What is dtype
?
Something that belongs to pandas
or numpy
, or both, or something else? If we examine pandas code:
df = pd.DataFrame({'float': [1.0],
'int': [1],
'datetime': [pd.Timestamp('20180310')],
'string': ['foo']})
print(df)
print(df['float'].dtype,df['int'].dtype,df['datetime'].dtype,df['string'].dtype)
df['string'].dtype
It will output like this:
float int datetime string
0 1.0 1 2018-03-10 foo
---
float64 int64 datetime64[ns] object
---
dtype('O')
You can interpret the last as Pandas dtype('O')
or Pandas object which is Python type string, and this corresponds to Numpy string_
, or unicode_
types.
Pandas dtype Python type NumPy type Usage
object str string_, unicode_ Text
Like Don Quixote is on ass, Pandas is on Numpy and Numpy understand the underlying architecture of your system and uses the class numpy.dtype
for that.
Data type object is an instance of numpy.dtype
class that understand the data type more precise including:
In the context of this question dtype
belongs to both pands and numpy and in particular dtype('O')
means we expect the string.
Here is some code for testing with explanation: If we have the dataset as dictionary
import pandas as pd
import numpy as np
from pandas import Timestamp
data={'id': {0: 1, 1: 2, 2: 3, 3: 4, 4: 5}, 'date': {0: Timestamp('2018-12-12 00:00:00'), 1: Timestamp('2018-12-12 00:00:00'), 2: Timestamp('2018-12-12 00:00:00'), 3: Timestamp('2018-12-12 00:00:00'), 4: Timestamp('2018-12-12 00:00:00')}, 'role': {0: 'Support', 1: 'Marketing', 2: 'Business Development', 3: 'Sales', 4: 'Engineering'}, 'num': {0: 123, 1: 234, 2: 345, 3: 456, 4: 567}, 'fnum': {0: 3.14, 1: 2.14, 2: -0.14, 3: 41.3, 4: 3.14}}
df = pd.DataFrame.from_dict(data) #now we have a dataframe
print(df)
print(df.dtypes)
The last lines will examine the dataframe and note the output:
id date role num fnum
0 1 2018-12-12 Support 123 3.14
1 2 2018-12-12 Marketing 234 2.14
2 3 2018-12-12 Business Development 345 -0.14
3 4 2018-12-12 Sales 456 41.30
4 5 2018-12-12 Engineering 567 3.14
id int64
date datetime64[ns]
role object
num int64
fnum float64
dtype: object
All kind of different dtypes
df.iloc[1,:] = np.nan
df.iloc[2,:] = None
But if we try to set np.nan
or None
this will not affect the original column dtype. The output will be like this:
print(df)
print(df.dtypes)
id date role num fnum
0 1.0 2018-12-12 Support 123.0 3.14
1 NaN NaT NaN NaN NaN
2 NaN NaT None NaN NaN
3 4.0 2018-12-12 Sales 456.0 41.30
4 5.0 2018-12-12 Engineering 567.0 3.14
id float64
date datetime64[ns]
role object
num float64
fnum float64
dtype: object
So np.nan
or None
will not change the columns dtype
, unless we set the all column rows to np.nan
or None
. In that case column will become float64
or object
respectively.
You may try also setting single rows:
df.iloc[3,:] = 0 # will convert datetime to object only
df.iloc[4,:] = '' # will convert all columns to object
And to note here, if we set string inside a non string column it will become string or object dtype
.
Sure there's an entity for tabs:
	
(The tab is ASCII character 9, or Unicode U+0009.)
However, just like literal tabs (ones you type in to your text editor), all tab characters are treated as whitespace by HTML parsers and collapsed into a single space except those within a <pre>
block, where literal tabs will be rendered as 8 spaces in a monospace font.
I'd like to add my Python3 answer for completeness:
from io import BytesIO
from zipfile import ZipFile
import requests
def get_zip(file_url):
url = requests.get(file_url)
zipfile = ZipFile(BytesIO(url.content))
zip_names = zipfile.namelist()
if len(zip_names) == 1:
file_name = zip_names.pop()
extracted_file = zipfile.open(file_name)
return extracted_file
return [zipfile.open(file_name) for file_name in zip_names]
I also had this problem today, and deleting files org.eclipse.jst.server.tomcat.core.prefs
and org.eclipse.wst.server.core.prefs
didn't work.
Finally I found it's permission issue:
By default <apache-tomcat-version>/conf/*
can be read only by owner, after I made it readable for all, it works! So run this command:
chmod a+r <apache-tomcat-version>/conf/*
Here is the link where I found the root cause:
http://www.thecodingforums.com/threads/eclipse-cannot-create-tomcat-server.953960/#post-5058434
Create a function and copy the code using winsock which is mentioned already by Software_Developer.
For Instance:
#ifdef _WIN32
// this is required only for windows
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
{
//...
}
#endif
winsock code here
#ifdef _WIN32
WSACleanup();
#endif
It is possible.
<span ng-if="checked && checked2">
I'm removed when the checkbox is unchecked.
</span>
You may find my MSDN article on the subject helpful; I took a lot of space in that article describing when you should use async
on ASP.NET, not just how to use async
on ASP.NET.
I have some concerns using async actions in ASP.NET MVC. When it improves performance of my apps, and when - not.
First, understand that async
/await
is all about freeing up threads. On GUI applications, it's mainly about freeing up the GUI thread so the user experience is better. On server applications (including ASP.NET MVC), it's mainly about freeing up the request thread so the server can scale.
In particular, it won't:
await
. await
only "yields" to the ASP.NET thread pool, not to the browser.First question is - is it good to use async action everywhere in ASP.NET MVC?
I'd say it's good to use it everywhere you're doing I/O. It may not necessarily be beneficial, though (see below).
However, it's bad to use it for CPU-bound methods. Sometimes devs think they can get the benefits of async
by just calling Task.Run
in their controllers, and this is a horrible idea. Because that code ends up freeing up the request thread by taking up another thread, so there's no benefit at all (and in fact, they're taking the penalty of extra thread switches)!
Shall I use async/await keywords when I want to query database (via EF/NHibernate/other ORM)?
You could use whatever awaitable methods you have available. Right now most of the major players support async
, but there are a few that don't. If your ORM doesn't support async
, then don't try to wrap it in Task.Run
or anything like that (see above).
Note that I said "you could use". If you're talking about ASP.NET MVC with a single database backend, then you're (almost certainly) not going to get any scalability benefit from async
. This is because IIS can handle far more concurrent requests than a single instance of SQL server (or other classic RDBMS). However, if your backend is more modern - a SQL server cluster, Azure SQL, NoSQL, etc - and your backend can scale, and your scalability bottleneck is IIS, then you can get a scalability benefit from async
.
Third question - How many times I can use await keywords to query database asynchronously in ONE single action method?
As many as you like. However, note that many ORMs have a one-operation-per-connection rule. In particular, EF only allows a single operation per DbContext; this is true whether the operation is synchronous or asynchronous.
Also, keep in mind the scalability of your backend again. If you're hitting a single instance of SQL Server, and your IIS is already capable of keeping SQLServer at full capacity, then doubling or tripling the pressure on SQLServer is not going to help you at all.
btnTest_Click(null, null);
Provided that the method isn't using either of these parameters (it's very common not to.)
To be honest though this is icky. If you have code that needs to be called you should follow the following convention:
protected void btnTest_Click(object sender, EventArgs e)
{
SomeSub();
}
protected void SomeOtherFunctionThatNeedsToCallTheCode()
{
SomeSub();
}
protected void SomeSub()
{
// ...
}
Maven is not installed any more by default on Mac OS X 10.9. You need to install it yourself, for example using Homebrew.
The command to install Maven using Homebrew is
brew install maven
I'll just leave this here for people interested in an implementation with no dependencies.
inline int
stringLength (char *String)
{
int Count = 0;
while (*String ++) ++ Count;
return Count;
}
inline int
stringToInt (char *String)
{
int Integer = 0;
int Length = stringLength(String);
for (int Caret = Length - 1, Digit = 1; Caret >= 0; -- Caret, Digit *= 10)
{
if (String[Caret] == '-') return Integer * -1;
Integer += (String[Caret] - '0') * Digit;
}
return Integer;
}
Works with negative values, but can't handle non-numeric characters mixed in between (should be easy to add though). Integers only.
Try this one to get n th max salary
i have tried this before posting & It Works fine
eg. to find 10th max salary replace limit 9,1;
mysql> select name,salary from emp group by salary desc limit n-1,1;
In most cases @tster's answer will suffice. However, I had a scenario where I wanted to update a row without first retrieving it.
My situation is this: I've got a table where I want to "lock" a row so that only a single user at a time will be able to edit it in my app. I'm achieving this by saying
update items set status = 'in use', lastuser = @lastuser, lastupdate = @updatetime where ID = @rowtolock and @status = 'free'
The reason being, if I were to simply retrieve the row by ID, change the properties and then save, I could end up with two people accessing the same row simultaneously. This way, I simply send and update claiming this row as mine, then I try to retrieve the row which has the same properties I just updated with. If that row exists, great. If, for some reason it doesn't (someone else's "lock" command got there first), I simply return FALSE from my method.
I do this by using context.Database.ExecuteSqlCommand which accepts a string command and an array of parameters.
Just wanted to add this answer to point out that there will be scenarios in which retrieving a row, updating it, and saving it back to the DB won't suffice and that there are ways of running a straight update statement when necessary.
Do the following steps to resolve the problem
Ensure that the JDK is already installed.
If the installer is on a CD, Copy the EXE file for the Netbeans 6.5.1 installer onto your hard disk.
Note the location of the installer.
Open a Command Prompt running as administrator: Go to Start button > All Programs > Accessories Right click Command Prompt Select Run as administrator
In the Command Prompt use the cd command to change to the directory containing the installer.
Execute the following command to extract the contents of the installer: [Note: You might need to change the name of the installer to match the one you have.]
netbeans-6.5.1-ml-java-windows.exe --extract
Execute the following command to manually execute the installer:
java -jar bundle.jar
You will see rapid scrolling output in the Command Prompt window for a few moments, then the installer window will appear to begin the installation process.
It took me a while to combine everything, make it a bit secure, and have it work with Gmail. I hope this answer saves someone some time.
Create a file with the encrypted server password:
In Powershell, enter the following command (replace myPassword with your actual password):
"myPassword" | ConvertTo-SecureString -AsPlainText -Force | ConvertFrom-SecureString | Out-File "C:\EmailPassword.txt"
Create a powershell script (Ex. sendEmail.ps1):
$User = "[email protected]"
$File = "C:\EmailPassword.txt"
$cred=New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $User, (Get-Content $File | ConvertTo-SecureString)
$EmailTo = "[email protected]"
$EmailFrom = "[email protected]"
$Subject = "Email Subject"
$Body = "Email body text"
$SMTPServer = "smtp.gmail.com"
$filenameAndPath = "C:\fileIwantToSend.csv"
$SMTPMessage = New-Object System.Net.Mail.MailMessage($EmailFrom,$EmailTo,$Subject,$Body)
$attachment = New-Object System.Net.Mail.Attachment($filenameAndPath)
$SMTPMessage.Attachments.Add($attachment)
$SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer, 587)
$SMTPClient.EnableSsl = $true
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential($cred.UserName, $cred.Password);
$SMTPClient.Send($SMTPMessage)
Automate with Task Scheduler:
Create a batch file (Ex. emailFile.bat) with the following:
powershell -ExecutionPolicy ByPass -File C:\sendEmail.ps1
Create a task to run the batch file. Note: you must have the task run with the same user account that you used to encrypted the password! (Aka, probably the logged in user)
That's all; you now have a way to automate and schedule sending an email and an attachment with Windows Task Scheduler and Powershell. No 3rd party software and the password is not stored as plain text (though granted, not terribly secure either).
You can also read this article on the level of security this provides for your email password.
In your own (base) class, willSet
and didSet
are quite reduntant , as you could instead define a calculated property (i.e get- and set- methods) that access a _propertyVariable
and does the desired pre- and post- prosessing.
If, however, you override a class where the property is already defined, then the willSet
and didSet
are useful and not redundant!
You could use a temp table which the stored procedure expects to exist. This will work on older versions of SQL Server, which do not support XML etc.
CREATE TABLE #temp
(INT myid)
GO
CREATE PROC myproc
AS
BEGIN
DELETE YourTable
FROM YourTable
LEFT OUTER JOIN #temp T ON T.myid=s.id
WHERE s.id IS NULL
END
A quicker way if you are using React 16.3 and above is by creating a ref in the constructor, then attaching it to the component you wish to use with as shown below.
...
constructor(props){
...
//create a ref
this.someRefName = React.createRef();
}
onScroll(){
let offsetTop = this.someRefName.current.offsetTop;
}
render(){
...
<Component ref={this.someRefName} />
}
you can use Dependency Walker to view the function name. you can see the function's parameters only if it's decorated. read the following from the FAQ:
How do I view the parameter and return types of a function? For most functions, this information is simply not present in the module. The Windows' module file format only provides a single text string to identify each function. There is no structured way to list the number of parameters, the parameter types, or the return type. However, some languages do something called function "decoration" or "mangling", which is the process of encoding information into the text string. For example, a function like int Foo(int, int) encoded with simple decoration might be exported as _Foo@8. The 8 refers to the number of bytes used by the parameters. If C++ decoration is used, the function would be exported as ?Foo@@YGHHH@Z, which can be directly decoded back to the function's original prototype: int Foo(int, int). Dependency Walker supports C++ undecoration by using the Undecorate C++ Functions Command.
You can use
str1.compareTo(str2);
If str1 is lexicographically less than str2, a negative number
will be returned, 0
if equal or a positive number
if str1 is greater.
E.g.,
"a".compareTo("b"); // returns a negative number, here -1
"a".compareTo("a"); // returns 0
"b".compareTo("a"); // returns a positive number, here 1
"b".compareTo(null); // throws java.lang.NullPointerException
Thanks Chris. That's what I was looking for. However, note that the method is serialize(). And there is another method serializeArray() that looks very useful that I may use. Thanks for pointing me in the right direction.
var queryString = $('#frmAdvancedSearch').serialize();
alert(queryString);
var fieldValuePairs = $('#frmAdvancedSearch').serializeArray();
$.each(fieldValuePairs, function(index, fieldValuePair) {
alert("Item " + index + " is [" + fieldValuePair.name + "," + fieldValuePair.value + "]");
});
Even I got the same problem when I've first installed Anaconda. It said 'conda' command not found.
So I've just setup two values[added two new paths of Anaconda] system environment variables in the PATH variable which are: C:\Users\mshas\Anaconda2\ & C:\Users\mshas\Anaconda2\Scripts
Lot of people forgot to add the second variable which is "Scripts" just add that then 'conda' command works.