in my case, the problem got solved only by implementing serializable as below:
@Entity @Table(name = "User" , uniqueConstraints = { @UniqueConstraint(columnNames = {"nam"}) }) public class User extends GenericT implements Serializable
A simple way of binding a variable to an input (two-way binding) is to just directly access the input element in the getter and setter:
var variable = function(element){
return {
get : function () { return element.value;},
set : function (value) { element.value = value;}
}
};
In HTML:
<input id="an-input" />
<input id="another-input" />
And to use:
var myVar = new variable(document.getElementById("an-input"));
myVar.set(10);
// and another example:
var myVar2 = new variable(document.getElementById("another-input"));
myVar.set(myVar2.get());
var variable = function(element){
return function () {
if(arguments.length > 0)
element.value = arguments[0];
else return element.value;
}
}
To use:
var v1 = new variable(document.getElementById("an-input"));
v1(10); // sets value to 20.
console.log(v1()); // reads value.
The other answers do not seem to touch on a key aspect here, and that is you make no mention of requiring supporting a web browser as a client. Most of the limitations of plain HTTP above are assuming you would be working with browser/ JS implementations.
The HTTP protocol is fully capable of full-duplex communication; it is legal to have a client perform a POST with a chunked encoding transfer, and a server to return a response with a chunked-encoding body. This would remove the header overhead to just at init time.
So if all you're looking for is full-duplex, control both client and server, and are not interested in extra framing/features of WebSockets, then I would argue that HTTP is a simpler approach with lower latency/CPU (although the latency would really only differ in microseconds or less for either).
There are a lot of great answers here, but I would like to offer my perspective on the differences between @
, =
, and &
binding that proved useful for me.
All three bindings are ways of passing data from your parent scope to your directive's isolated scope through the element's attributes:
@ binding is for passing strings. These strings support
{{}}
expressions for interpolated values. For example: . The interpolated expression is evaluated against directive's parent scope.= binding is for two-way model binding. The model in parent scope is linked to the model in the directive's isolated scope. Changes to one model affects the other, and vice versa.
& binding is for passing a method into your directive's scope so that it can be called within your directive. The method is pre-bound to the directive's parent scope, and supports arguments. For example if the method is hello(name) in parent scope, then in order to execute the method from inside your directive, you must call $scope.hello({name:'world'})
I find that it's easier to remember these differences by referring to the scope bindings by a shorter description:
@
Attribute string binding=
Two-way model binding&
Callback method bindingThe symbols also make it clearer as to what the scope variable represents inside of your directive's implementation:
@
string=
model&
methodIn order of usefulness (for me anyways):
In addition to the answers here...
if you are using jquery on the client side, this worked for me:
Java:
@RequestMapping(value = "/ajax/search/sync")
public String sync(@RequestBody Foo json) {
Jquery (you need to include Douglas Crockford's json2.js to have the JSON.stringify function):
$.ajax({
type: "post",
url: "sync", //your valid url
contentType: "application/json", //this is required for spring 3 - ajax to work (at least for me)
data: JSON.stringify(jsonobject), //json object or array of json objects
success: function(result) {
//do nothing
},
error: function(){
alert('failure');
}
});
I'm not 100% sure this is the only difference, but it is the main difference. It is also recommended to have bi-directional associations by the Hibernate docs:
http://docs.jboss.org/hibernate/core/3.3/reference/en/html/best-practices.html
Specifically:
Prefer bidirectional associations: Unidirectional associations are more difficult to query. In a large application, almost all associations must be navigable in both directions in queries.
I personally have a slight problem with this blanket recommendation -- it seems to me there are cases where a child doesn't have any practical reason to know about its parent (e.g., why does an order item need to know about the order it is associated with?), but I do see value in it a reasonable portion of the time as well. And since the bi-directionality doesn't really hurt anything, I don't find it too objectionable to adhere to.
1) The circles are Entities/POJOs/Beans
2) deg is an abbreviation for degree as in graphs (number of edges)
PK=Primary key, FK=Foreign key
Note the contradiction between the degree and the name of the side. Many corresponds to degree=1 while One corresponds to degree >1.
Unbelievably, in 3 years nobody has answered your excellent question with examples of both ways to map the relationship.
As mentioned by others, the "owner" side contains the pointer (foreign key) in the database. You can designate either side as the owner, however, if you designate the One side as the owner, the relationship will not be bidirectional (the inverse aka "many" side will have no knowledge of its "owner"). This can be desirable for encapsulation/loose coupling:
// "One" Customer owns the associated orders by storing them in a customer_orders join table
public class Customer {
@OneToMany(cascade = CascadeType.ALL)
private List<Order> orders;
}
// if the Customer owns the orders using the customer_orders table,
// Order has no knowledge of its Customer
public class Order {
// @ManyToOne annotation has no "mappedBy" attribute to link bidirectionally
}
The only bidirectional mapping solution is to have the "many" side own its pointer to the "one", and use the @OneToMany "mappedBy" attribute. Without the "mappedBy" attribute Hibernate will expect a double mapping (the database would have both the join column and the join table, which is redundant (usually undesirable)).
// "One" Customer as the inverse side of the relationship
public class Customer {
@OneToMany(cascade = CascadeType.ALL, mappedBy = "customer")
private List<Order> orders;
}
// "many" orders each own their pointer to a Customer
public class Order {
@ManyToOne
private Customer customer;
}
iOS includes built in support for base64 encoding and decoding. If you look at resolv.h
you should see the two functions b64_ntop
and b64_pton
. The Square SocketRocket library provides a reasonable example of how to use these functions from objective-c.
These functions are pretty well tested and reliable - unlike many of the implementations you may find in random internet postings.
Don't forget to link against libresolv.dylib
.
It does not make sense to put your business layer in the Model for an MVC project.
Say that your boss decides to change the presentation layer to something else, you would be screwed! The business layer should be a separate assembly. A Model contains the data that comes from the business layer that passes to the view to display. Then on post for example, the model binds to a Person class that resides in the business layer and calls PersonBusiness.SavePerson(p); where p is the Person class. Here's what I do (BusinessError class is missing but would go in the BusinessLayer too):
Your code works for me. When does addSalespersonOption
get called? There may be a problem with that call.
Also some of your html is a bit off (maybe copy/paste problem?), but that didn't seem to cause any problems. Your select should look like this:
<select id="salesperson">
<option value="">(select)</option>
</select>
instead of this:
<select id="salesperson" />
<option value"">(select)</option>
</select>
Edit: When does your options list get dynamically populated? Are you sure you are passing 'on'
for the defSales
value in your call to addSalespersonOption
? Try changing that code to this:
if (selected == "on") {
alert('setting default selected option to ' + text);
html = '<option value="'+value+'" selected="selected">'+text+'</option>';
}
and see if the alert happens and what is says if it does happen.
Edit: Working example of my testing (the error:undefined is from jsbin, not my code).
To select the first and the second cell in each row, you could do this:
$(".location table tbody tr").each(function() {
$(this).children('td').slice(0, 2).addClass("black");
});
Try this:
public void double randomFill() {
Random rand = new Random();
for (int i = 0; i < this.anArray.length(); i++)
this.anArray[i] = rand.nextInt();
}
>>> a = numpy.full((2,4), True, dtype=bool)
>>> a[1][3]
True
>>> a
array([[ True, True, True, True],
[ True, True, True, True]], dtype=bool)
numpy.full(Size, Scalar Value, Type). There is other arguments as well that can be passed, for documentation on that, check https://docs.scipy.org/doc/numpy/reference/generated/numpy.full.html
try
public void PrintGeneric<T>(T test) where T: ITest
{
Console.WriteLine("Generic : " + test.@var);
}
as @Ash Burlaczenko has said you cant name a variable after a keyword, if you reallllly want this prefix with @ symbol to escape the keyword
This is long over due, but if i interpret the problem correctly i have found a simple solution, note, this is an explanation in my own terminology:
git stash [save]
will save away current changes and set your current branch to the "clean state"
git stash list
gives something like: stash@{0}: On develop: saved testing-stuff
git apply stash@{0}
will set current branch as before stash [save]
git checkout .
Will set current branch as after stash [save]
The code that is saved in the stash is not lost, it can be found by git apply stash@{0}
again.
Anywhay, this worked for me!
So I spent about 5 hours trying to figure out how to deal with this issue when trying to run
./manage.py makemigrations
With Ubuntu Server LTS 16.1, a full LAMP stack, Apache2 MySql 5.7 PHP 7 Python 3 and Django 1.10.2 I really struggled to find a good answer to this. In fact, I am still not satisfied, but the ONLY solution that worked for me is this...
sudo apt-get install build-essential python-dev libapache2-mod-wsgi-py3 libmysqlclient-dev
followed by (from inside the virtual environment)
pip install mysqlclient
I really dislike having to use dev installs when I am trying to set up a new web server, but unfortunately this configuration was the only mostly comfortable path I could take.
This worked for me (macOS v10.13 (High Sierra)):
sudo -u postgres /Library/PostgreSQL/9.6/bin/pg_ctl start -D /Library/PostgreSQL/9.6/data
Or first
cd /Library/PostgreSQL/9.6/bin/
I've found that this error is also generated if the document is empty. In this case it's also because there is no root element - but the error message "Extra content and the end of the document" is misleading in this situation.
This error also occurs when you try to move the whole project directory to other path. And you happened to run the following commands below BEFORE you move.
php artisan optimize --force
php artisan config:cache
php artisan route:cache
Mine error message shows like this
As you can see the old path was written in the compiled.php. So, to fix the problem. Simply run the same command AGAIN under the project folder in your new folder location.
php artisan optimize --force
php artisan config:cache
php artisan route:cache
Hope this helps.
You cannot append to an existing xlsx file with xlsxwriter
.
There is a module called openpyxl which allows you to read and write to preexisting excel file, but I am sure that the method to do so involves reading from the excel file, storing all the information somehow (database or arrays), and then rewriting when you call workbook.close()
which will then write all of the information to your xlsx file.
Similarly, you can use a method of your own to "append" to xlsx documents. I recently had to append to a xlsx file because I had a lot of different tests in which I had GPS data coming in to a main worksheet, and then I had to append a new sheet each time a test started as well. The only way I could get around this without openpyxl was to read the excel file with xlrd and then run through the rows and columns...
i.e.
cells = []
for row in range(sheet.nrows):
cells.append([])
for col in range(sheet.ncols):
cells[row].append(workbook.cell(row, col).value)
You don't need arrays, though. For example, this works perfectly fine:
import xlrd
import xlsxwriter
from os.path import expanduser
home = expanduser("~")
# this writes test data to an excel file
wb = xlsxwriter.Workbook("{}/Desktop/test.xlsx".format(home))
sheet1 = wb.add_worksheet()
for row in range(10):
for col in range(20):
sheet1.write(row, col, "test ({}, {})".format(row, col))
wb.close()
# open the file for reading
wbRD = xlrd.open_workbook("{}/Desktop/test.xlsx".format(home))
sheets = wbRD.sheets()
# open the same file for writing (just don't write yet)
wb = xlsxwriter.Workbook("{}/Desktop/test.xlsx".format(home))
# run through the sheets and store sheets in workbook
# this still doesn't write to the file yet
for sheet in sheets: # write data from old file
newSheet = wb.add_worksheet(sheet.name)
for row in range(sheet.nrows):
for col in range(sheet.ncols):
newSheet.write(row, col, sheet.cell(row, col).value)
for row in range(10, 20): # write NEW data
for col in range(20):
newSheet.write(row, col, "test ({}, {})".format(row, col))
wb.close() # THIS writes
However, I found that it was easier to read the data and store into a 2-dimensional array because I was manipulating the data and was receiving input over and over again and did not want to write to the excel file until it the test was over (which you could just as easily do with xlsxwriter since that is probably what they do anyway until you call .close()
).
I am not an expert in HTML but here is what worked for me:
<div class="img-with-text-below">
<img src="your-image.jpg" alt="alt-text" />
<p><center>Your text</center></p>
</div>
Use thing[:]
>>> a = [1,2]
>>> b = a[:]
>>> a += [3]
>>> a
[1, 2, 3]
>>> b
[1, 2]
>>>
If you're getting this error and you are using Maven to build your Jars, then there is a good chance that you simply do not have your Java classes in src/main/java/
.
In my case I created my project in Eclipse which defaults to src
(rather than src/main/java/
.
So I ended up with something like mypackage.morepackage.myclass
and a directory structure looking like src/mypackage/morepackage/myclass
, which inherently has nothing wrong. But when you run mvn clean install
it will look for src/main/java/mypackage/morepackage/myclass
. It will not find the class but it won't error either. So it will successfully build and you when you run your outputted Jar the result is:
Error: Could not find or load main class mypackage.morepackage.myclass
Because it simply never included your class in the packaged Jar.
In Angular I used Ben's answer this way:
$scope.convert = function (thedate) {
var tempstr = thedate.toString();
var newstr = tempstr.toString().replace(/GMT.*/g, "");
newstr = newstr + " UTC";
return new Date(newstr);
};
Edit: Angular 1.3.0 added UTC support to date filter, I haven't use it yet but it should be easier, here is the format:
{{ date_expression | date : format : timezone}}
MySQL 3 and 4 (and 5):
desc tablename
which is an alias for
show fields from tablename
SQL Server (from 2000) and MySQL 5:
select COLUMN_NAME from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME = 'tablename'
Completing the answer: like people below have said, in SQL Server you can also use the stored procedure sp_help
exec sp_help 'tablename'
Your Html
<input type="button" value="Clear" onclick="clearContent()">
<textarea id='output' rows=20 cols=90></textarea>
Your Javascript
function clearContent()
{
document.getElementById("output").value='';
}
One way to handle this is to put the information as an attribute on the primary one. I must stress, I really think this is the appropriate thing to do only when the two pieces of information are related such that one has information about the other.
For example, I sometimes stash the name of "crucial variables" or variables that have been significantly modified by storing a list of variable names as an attribute on the data frame:
attr(my.DF, 'Modified.Variables') <- DVs.For.Analysis$Names.of.Modified.Vars
return(my.DF)
This allows me to store a list of variable names with the data frame itself.
The python error says that wordInput
is not an iterable -> it is of NoneType.
If you print wordInput
before the offending line, you will see that wordInput
is None
.
Since wordInput
is None
, that means that the argument passed to the function is also None
. In this case word
. You assign the result of pickEasy
to word
.
The problem is that your pickEasy
function does not return anything. In Python, a method that didn't return anything returns a NoneType.
I think you wanted to return a word
, so this will suffice:
def pickEasy():
word = random.choice(easyWords)
word = str(word)
for i in range(1, len(word) + 1):
wordCount.append("_")
return word
Hmm... well, the simple way that comes to mind is to convert it to a dict
d = dict(thelist)
and access d[53]
.
EDIT: Oops, misread your question the first time. It sounds like you actually want to get the index where a given number is stored. In that case, try
dict((t[0], i) for i, t in enumerate(thelist))
instead of a plain old dict
conversion. Then d[53]
would be 2.
The package is called build-essential without the plural "s". So
sudo apt-get install build-essential
should do what you want.
Hide the body initially, and then show it with jQuery after it has loaded.
body {
display: none;
}
$(function () {
$('body').show();
}); // end ready
Also, it would be best to have $('body').show();
as the last line in your last and main .js file.
Polymorphism: Suppose you work for a company that sells pens. So you make a very nice class called "Pen" that handles everything that you need to know about a pen. You write all sorts of classes for billing, shipping, creating invoices, all using the Pen class. A day boss comes and says, "Great news! The company is growing and we are selling Books & CD's now!" Not great news because now you have to change every class that uses Pen to also use Book & CD. But what if you had originally created an interface called "SellableProduct", and Pen implemented this interface. Then you could have written all your shipping, invoicing, etc classes to use that interface instead of Pen. Now all you would have to do is create a new class called Book & CompactDisc which implements the SellableProduct interface. Because of polymorphism, all of the other classes could continue to work without change! Make Sense?
So, it means using Inheritance which is one of the way to achieve polymorphism.
Polymorhism can be possible in a class / interface but Inheritance always between 2 OR more classes / interfaces. Inheritance always conform "is-a" relationship whereas it is not always with Polymorphism (which can conform both "is-a" / "has-a" relationship.
Also in addition to above solutions, also check the location where the tnsname ora file exists and compare with the path in the environment variable
To not deal with many 0s, use this variant:
Math.round(num * 1e2) / 1e2
With SQL server 2008 and more, using this query:
ALTER TABLE [RecipeInventorys] ALTER COLUMN [RecipeName] varchar(550)
You need to Tomcat Dependency and also extend your Application Class from extends SpringBootServletInitializer
@SpringBootApplication
public class App extend SpringBootServletInitializer
{
public static void main( String[] args )
{
SpringApplication.run(App.class, "hello");
}
}
It's pretty simple.
var oFile = document.getElementById("fileUpload").files[0]; // <input type="file" id="fileUpload" accept=".jpg,.png,.gif,.jpeg"/>
if (oFile.size > 2097152) // 2 MiB for bytes.
{
alert("File size must under 2MiB!");
return;
}
The order is always implied in the structure of the regular expression. To accomplish what you want, you'll have to match the input string multiple times against different expressions.
What you want to do is not possible with a single regexp.
I second @erickson: The pure data-transfer speed penalty is negligible. Modern CPUs reach a crypto/AES throughput of several hundred MBit/s. So unless you are on resource constrained system (mobile phone) TLS/SSL is fast enough for slinging data around.
But keep in mind that encryption makes caching and load balancing much harder. This might result in a huge performance penalty.
But connection setup is really a show stopper for many application. On low bandwidth, high packet loss, high latency connections (mobile device in the countryside) the additional roundtrips required by TLS might render something slow into something unusable.
For example we had to drop the encryption requirement for access to some of our internal web apps - they where next to unusable if used from china.
Try this one (removes all elements in the list that equal i
):
for (Object i : l) {
if (condition(i)) {
l = (l.stream().filter((a) -> a != i)).collect(Collectors.toList());
}
}
For Query parameters like domain.com/test?format=json&type=mini
format, then you can easily receive it via - req.query.
app.get('/test', function(req, res){
var format = req.query.format,
type = req.query.type;
});
The last changed time comes with the assumption that the web server provides accurate information. Dynamically generated pages will likely return the time the page was viewed. However, static pages are expected to reflect actual file modification time.
This is propagated through the HTTP header Last-Modified
. The Javascript trick by AZIRAR is clever and will display this value. Also, in Firefox going to Tools->Page Info will also display in the "Modified" field.
UPDATE (Jan 2020): There are many great online places to get beginner practice at Python, some which are highly engaging and/or otherwise interactive. These sites are generally more practical than the Python Challenge (http://pythonchallenge.com), which you can tackle later. (After years of experience, you can try the Python "wat" quiz). For now, it's most important to learn, practice, and have fun. Welcome to Python!
ps. BTW (by the way), your experience puts you right in the heart of the target audience of my Python book, Core Python Programming. That audience is those who know how to code in another high-level language but want to learn Python as quickly but as in-depth as possible. Reviews, philosophy, and other info at http://corepython.com
pps. The following resources were previously on the list but are no longer available.
There is several escaping options with same result:
body { width: ~"calc(100% - 250px - 1.5em)"; }
body { width: calc(~"100% - 250px - 1.5em"); }
body { width: calc(100% ~"-" 250px ~"-" 1.5em); }
I offen manage css/js plugin with composer which install it under vendor. I symlink those to the web/bundles directory, that's let composer update bundles as needed.
exemple:
1 - symlink once at all (use command fromweb/bundles/
ln -sf vendor/select2/select2/dist/ select2
2 - use asset where needed, in twig template :
{{ asset('bundles/select2/css/fileinput.css) }}
Regards.
Wrap your image with a span
element with a black background.
.img-wrapper {
display: inline-block;
background: #000;
}
.item-fade {
vertical-align: top;
transition: opacity 0.3s;
-webkit-transition: opacity 0.3s;
opacity: 1;
}
.item-fade:hover {
opacity: 0.2;
}
_x000D_
<span class="img-wrapper">
<img class="item-fade" src="http://placehold.it/100x100/cf5" />
</span>
_x000D_
People using Android Studio 0.8.6 could do these:
Copy ONLY facebook dir under the Facebook-android-sdk-xxx dir into your project along with app/
Now you should see Android Studio showing facebook as module
provided files('./libs/bolts.jar')
compileSdkVersion 20
or other version you defined in the appbuildToolsVersion '20.0.0'
minSdkVersion 14
targetSdkVersion 20
apply plugin: 'android-library'
dependencies {
compile 'com.android.support:support-v4:19.1.+'
provided files('./libs/bolts.jar')
}
android {
compileSdkVersion 20
buildToolsVersion '20.0.0'
defaultConfig {
minSdkVersion 14
targetSdkVersion 20
}
lintOptions {
abortOnError false
}
sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
res.srcDirs = ['res']
}
}
}
Resync your gradle file & it should just work fine!
I believe that what you are looking for is error option for the jquery ajax object
getJSON is a wrapper to the $.ajax
object, but it doesn't provide you with access to the error option.
EDIT: dcneiner has given a good example of the code you would need to use. (Even before I could post my reply)
Instead of show
, try to use CSS to hide and show the content.
function switch_tabs(obj) {
$('.tab-content').css('display', 'none'); // you could still use `.hide()` here
$('.tabs a').removeClass("selected");
var id = obj.attr("rel");
$('#' + id).css('display', 'inline-block');
obj.addClass("selected");
}
Try this way header('Content-Type: text/plain; charset=utf-8');
android.os.Build.VERSION.SDK_INT
Here you can find the possible values: VERSION_CODES
.
I was able to use nginx to handle the 301 redirect to the aws signin page.
Go to your nginx conf folder (in my case it's /etc/nginx/sites-available
in which I create a symlink to /etc/nginx/sites-enabled
for the enabled conf files).
Then add a redirect path
server {
listen 80;
server_name aws.example.com;
return 301 https://myaccount.signin.aws.amazon.com/console;
}
If you are using nginx, you will most likely have additional server blocks (virtualhosts in apache terminology) to handle your zone apex (example.com) or however you have it setup. Make sure that you have one of them set to be your default server.
server {
listen 80 default_server;
server_name example.com;
# rest of config ...
}
In Route 53, add an A record
for aws.example.com
and set the value to the same IP used for your zone apex.
There are three ways to save objects from your R session:
The save.image()
function will save all objects currently in your R session:
save.image(file="1.RData")
These objects can then be loaded back into a new R session using the load()
function:
load(file="1.RData")
If you want to save some, but not all objects, you can use the save()
function:
save(city, country, file="1.RData")
Again, these can be reloaded into another R session using the load()
function:
load(file="1.RData")
If you want to save a single object you can use the saveRDS()
function:
saveRDS(city, file="city.rds")
saveRDS(country, file="country.rds")
You can load these into your R session using the readRDS()
function, but you will need to assign the result into a the desired variable:
city <- readRDS("city.rds")
country <- readRDS("country.rds")
But this also means you can give these objects new variable names if needed (i.e. if those variables already exist in your new R session but contain different objects):
city_list <- readRDS("city.rds")
country_vector <- readRDS("country.rds")
Looks like someone finally did it, it is a tiny bit ugly - but here it is:
http://forum.xda-developers.com/showthread.php?t=1871281
It involves some kernel recompiling, and a bit of editing, and you loose partial functionality (the MDC?) .. but it's done.
Personally though, now that I see the "true cost", I would probably put together a little adapter on a Teency or something - assuming that Android can talk to serial devices via USB. But that's based on the fact that I have a samsung, and would require a special cable to make a USB connection anyway - no extra pain to have a little device on the end, if I have to carry the damn cable around anyway.
From w3 schools:
<style>
/* Tooltip container */
.tooltip {
position: relative;
display: inline-block;
border-bottom: 1px dotted black; /* If you want dots under the hoverable text */
}
/* Tooltip text */
.tooltip .tooltiptext {
visibility: hidden;
width: 120px;
background-color: black;
color: #fff;
text-align: center;
padding: 5px 0;
border-radius: 6px;
/* Position the tooltip text - see examples below! */
position: absolute;
z-index: 1;
}
/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
visibility: visible;
}
</style>
<div class="tooltip">Hover over me
<img src="/pathtoimage" class="tooltiptext">
</div>
Sounds like about what you want
if you want to use only arraylist then I am worried there is no better way which will create a huge performance benefit. But by only using arraylist i would check before adding into the list like following
void addToList(String s){
if(!yourList.contains(s))
yourList.add(s);
}
In this cases using a Set is suitable.
You'll need to reload the table on the UI
thread via:
//swift 2.3
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.tableView.reloadData()
})
//swift 5
DispatchQueue.main.async{
self.tableView.reloadData()
}
Follow up:
An easier alternative to the connection.start()
approach is to instead use NSURLConnection.sendAsynchronousRequest(...)
//NSOperationQueue.mainQueue() is the main thread
NSURLConnection.sendAsynchronousRequest(NSURLRequest(URL: url), queue: NSOperationQueue.mainQueue()) { (response, data, error) -> Void in
//check error
var jsonError: NSError?
let json: AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.allZeros, error: &jsonError)
//check jsonError
self.collectionView?.reloadData()
}
This doesn't allow you the flexibility of tracking the bytes though, for example you might want to calculate the progress of the download via bytesDownloaded/bytesNeeded
To get a type that implements io.Reader
from a []byte
slice, you can use bytes.NewReader
in the bytes
package:
r := bytes.NewReader(byteData)
This will return a value of type bytes.Reader
which implements the io.Reader
(and io.ReadSeeker
) interface.
Don't worry about them not being the same "type". io.Reader
is an interface and can be implemented by many different types. To learn a little bit more about interfaces in Go, read Effective Go: Interfaces and Types.
You could also just use the bytes where they are, casting them to the type you need.
unsigned char *bytePtr = (unsigned char *)[data bytes];
I just implemented this utility class that removes a char or a group of chars from a String. I think it's fast because doesn't use Regexp. I hope that it helps someone!
package your.package.name;
/**
* Utility class that removes chars from a String.
*
*/
public class RemoveChars {
public static String remove(String string, String remove) {
return new String(remove(string.toCharArray(), remove.toCharArray()));
}
public static char[] remove(final char[] chars, char[] remove) {
int count = 0;
char[] buffer = new char[chars.length];
for (int i = 0; i < chars.length; i++) {
boolean include = true;
for (int j = 0; j < remove.length; j++) {
if ((chars[i] == remove[j])) {
include = false;
break;
}
}
if (include) {
buffer[count++] = chars[i];
}
}
char[] output = new char[count];
System.arraycopy(buffer, 0, output, 0, count);
return output;
}
/**
* For tests!
*/
public static void main(String[] args) {
String string = "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG";
String remove = "AEIOU";
System.out.println();
System.out.println("Remove AEIOU: " + string);
System.out.println("Result: " + RemoveChars.remove(string, remove));
}
}
This is the output:
Remove AEIOU: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
Result: TH QCK BRWN FX JMPS VR TH LZY DG
You can use matching groups:
p = re.compile('name (.*) is valid')
e.g.
>>> import re
>>> p = re.compile('name (.*) is valid')
>>> s = """
... someline abc
... someother line
... name my_user_name is valid
... some more lines"""
>>> p.findall(s)
['my_user_name']
Here I use re.findall
rather than re.search
to get all instances of my_user_name
. Using re.search
, you'd need to get the data from the group on the match object:
>>> p.search(s) #gives a match object or None if no match is found
<_sre.SRE_Match object at 0xf5c60>
>>> p.search(s).group() #entire string that matched
'name my_user_name is valid'
>>> p.search(s).group(1) #first group that match in the string that matched
'my_user_name'
As mentioned in the comments, you might want to make your regex non-greedy:
p = re.compile('name (.*?) is valid')
to only pick up the stuff between 'name '
and the next ' is valid'
(rather than allowing your regex to pick up other ' is valid'
in your group.
See the git-pull man page:
git pull [options] [<repository> [<refspec>...]]
and in the examples section:
Merge into the current branch the remote branch next:
$ git pull origin next
So I imagine you want to do something like:
git pull origin dev
To set it up so that it does this by default while you're on the dev branch:
git branch --set-upstream-to dev origin/dev
At ms end Rx lev ranges 0 to -120 dbm Mean antenna power which received at ms end alway less than 1mW.
Thats why it always -ve.
One of alternatives is MSYS2 , in another words "MinGW-w64"/Git Bash. You can simply ssh to Unix machines and run most of linux commands from it. Also install tmux!
To install tmux in MSYS2:
run command pacman -S tmux
To run tmux on Git Bash:
install MSYS2 and copy tmux.exe
and msys-event-2-1-6.dll
from MSYS2 folder C:\msys64\usr\bin
to your Git Bash directory C:\Program Files\Git\usr\bin
.
At my work, we have a very big system that runs on many PCs at the same time, with very big tables with hundreds of thousands of rows, and sometimes many millions of rows.
When you make a SELECT on a very big table, let's say you want to know every transaction a user has made in the past 10 years, and the primary key of the table is not built in an efficient way, the query might take several minutes to run.
Then, our application might me running on many user's PCs at the same time, accessing the same database. So if someone tries to insert into the table that the other SELECT is reading (in pages that SQL is trying to read), then a LOCK can occur and the two transactions block each other.
We had to add a "NO LOCK" to our SELECT statement, because it was a huge SELECT on a table that is used a lot by a lot of users at the same time and we had LOCKS all the time.
I don't know if my example is clear enough? This is a real life example.
I got this error
ERROR 1064 (42000)
because the downloaded .sql.tar file was somehow corrupted. Downloading and extracting it again solved the issue.
I've just faced the same problem. It happened because the MySQL Daemon was binded to the IP of the machine, which is required to make connection with an user that has permission to connect @your_machine. In this case, the user should have permission to connect USER_NAME@MACHINE_NAME_OR_IP
I wanted remote access to my machine so I changed in my.cnf from
bind-address = MY_IP_ADDRESS
To
bind-address = 0.0.0.0
Which will allow an user from localhost AND even outside (in my case) to connect to the instance. Both below permissions will work if you bind the MySQL to 0.0.0.0:
USER_NAME@MACHINE_NAME_OR_IP
USER_NAME@localhost
You can give this simple jQuery plugin (AnimateScroll) a whirl. It is quite easy to use.
1. Scroll to the top of the page:
$('body').animatescroll();
2. Scroll to an element with ID section-1
:
$('#section-1').animatescroll({easing:'easeInOutBack'});
Disclaimer: I am the author of this plugin.
None of the above worked for me. In the end I used:
^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$ (js engine)
Logic:
The first number (hours) is either:
a number between 0 and 19 --> [0-1]?[0-9]
(allowing single digit number)
or
a number between 20 - 23 --> 2[0-3]
the second number (minutes) is always a number between 00 and 59 --> [0-5][0-9]
(not allowing a single digit)
I think that the best way to hide the console screen of the PowerShell when your are running a background scripts is this code ("Bluecakes" answer).
I add this code in the beginning of all my PowerShell scripts that I need to run in background.
# .Net methods for hiding/showing the console in the background
Add-Type -Name Window -Namespace Console -MemberDefinition '
[DllImport("Kernel32.dll")]
public static extern IntPtr GetConsoleWindow();
[DllImport("user32.dll")]
public static extern bool ShowWindow(IntPtr hWnd, Int32 nCmdShow);
'
function Hide-Console
{
$consolePtr = [Console.Window]::GetConsoleWindow()
#0 hide
[Console.Window]::ShowWindow($consolePtr, 0)
}
Hide-Console
If this answer was help you, please vote to "Bluecakes" in his answer in this post.
Simply try running npm install
/ yarn
etc first before running npm start
/ yarn
start as @only4 mentioned, if you see this problem, as it means your .env
is not in sync with your package.json
, i.e. you installed a package but not quite configured it or other way around
>>> L = ['apple','red','apple','red','red','pear']
>>> from collections import defaultdict
>>> d = defaultdict(int)
>>> for i in L:
... d[i] += 1
>>> d
defaultdict(<type 'int'>, {'pear': 1, 'apple': 2, 'red': 3})
No, the standard way to serialize to JSON is to use an existing JSON serialization library. If you don't wish to do this, then you're going to have to write your own serialization methods.
If you want guidance on how to do this, I'd suggest examining the source of some of the available libraries.
EDIT: I'm not going to come out and say that writing your own serliazation methods is bad, but you must consider that if it's important to your application to use well-formed JSON, then you have to weigh the overhead of "one more dependency" against the possibility that your custom methods may one day encounter a failure case that you hadn't anticipated. Whether that risk is acceptable is your call.
I usually do it using Seaborn which is built on top of matplotlib
import seaborn as sns
iris = sns.load_dataset('iris')
sns.scatterplot(x='sepal_length', y='sepal_width',
hue='species', data=iris);
If you want only digits:
var value = '675-805-714';
var numberPattern = /\d+/g;
value = value.match( numberPattern ).join([]);
alert(value);
//Show: 675805714
Now you get the digits joined
you should use the EnumWindow API.
there are plenty of examples on how to use it from C#, I found something here:
This is a simple one line way to do it:
try {
URL url = new URL("http://....");
Bitmap image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch(IOException e) {
System.out.println(e);
}
for 1D and 2D arrays you can use np.savetxt to print using a specific format string:
>>> import sys
>>> x = numpy.arange(20).reshape((4,5))
>>> numpy.savetxt(sys.stdout, x, '%5.2f')
0.00 1.00 2.00 3.00 4.00
5.00 6.00 7.00 8.00 9.00
10.00 11.00 12.00 13.00 14.00
15.00 16.00 17.00 18.00 19.00
Your options with numpy.set_printoptions or numpy.array2string in v1.3 are pretty clunky and limited (for example no way to suppress scientific notation for large numbers). It looks like this will change with future versions, with numpy.set_printoptions(formatter=..) and numpy.array2string(style=..).
# Maybe you search this ??
For example in my case I use Symfony 4.4 (PHP).
If you want to update User, you need to insert the User password
encrypted and test with the current Password not encrypted to verify
if it's the same User.
For example :
public function updateUser(Request $req)
{
$entityManager = $this->getDoctrine()->getManager();
$repository = $entityManager->getRepository(User::class);
$user = $repository->find($req->get(id)); /// get User from your DB
if($user == null){
throw $this->createNotFoundException('User don't exist!!', $user);
}
$password_old_encrypted = $user->getPassword();//in your DB is always encrypted.
$passwordToUpdate = $req->get('password'); // not encrypted yet from request.
$passwordToUpdateEncrypted = password_hash($passwordToUpdate , PASSWORD_DEFAULT);
////////////VERIFY IF IT'S THE SAME PASSWORD
$isPass = password_verify($passwordToUpdateEncrypted , $password_old_encrypted );
if($isPass === false){ // failure
throw $this->createNotFoundException('Your password it's not verify', null);
}
return $isPass; //// true!! it's the same password !!!
}
You can add leading zeroes to a variable (value up to 99) like this in batch:
IF 1%Var% LSS 100 SET Var=0%Var%
So you'd need to parse your date and time components out into separate variables, treat them all like this, then concatenate them back together to create the file name.
However, your underlying method for parsing date and time is dependent on system locale settings. If you're happy for your code not to be portable to other machines, that's probably fine, but if you expect it to work in different international contexts then you'll need a different approach, for example by reading out the registry settings:
HKEY_CURRENT_USER\Control Panel\International\iDate
HKEY_CURRENT_USER\Control Panel\International\iTime
HKEY_CURRENT_USER\Control Panel\International\iTLZero
(That last one controls whether there is a leading zero on times, but not dates as far as I know).
I wrote a very simple class for exporting to "Excel XML" aka SpreadsheetML. It's not quite as convenient for the end user as XSLX (depending on file extension and Excel version, they may get a warning message), but it's a lot easier to work with than XLS or XLSX.
You may find the following function useful:
function typeOf(obj) {
return {}.toString.call(obj).split(' ')[1].slice(0, -1).toLowerCase();
}
Or in ES7 (comment if further improvements)
const { toString } = Object.prototype;
function typeOf(obj) {
const stringified = obj::toString();
const type = stringified.split(' ')[1].slice(0, -1);
return type.toLowerCase();
}
Results:
typeOf(); //undefined
typeOf(null); //null
typeOf(NaN); //number
typeOf(5); //number
typeOf({}); //object
typeOf([]); //array
typeOf(''); //string
typeOf(function () {}); //function
typeOf(/a/) //regexp
typeOf(new Date()) //date
typeOf(new Error) //error
typeOf(Promise.resolve()) //promise
typeOf(function *() {}) //generatorfunction
typeOf(new WeakMap()) //weakmap
typeOf(new Map()) //map
typeOf(async function() {}) //asyncfunction
Thanks @johnrees for notifying me of: error, promise, generatorfunction
Python really tries hard to intelligently set sys.path
. How it is
set can get really complicated. The following guide is a watered-down,
somewhat-incomplete, somewhat-wrong, but hopefully-useful guide
for the rank-and-file python programmer of what happens when python
figures out what to use as the initial values of sys.path
,
sys.executable
, sys.exec_prefix
, and sys.prefix
on a normal
python installation.
First, python does its level best to figure out its actual physical
location on the filesystem based on what the operating system tells
it. If the OS just says "python" is running, it finds itself in $PATH.
It resolves any symbolic links. Once it has done this, the path of
the executable that it finds is used as the value for sys.executable
, no ifs,
ands, or buts.
Next, it determines the initial values for sys.exec_prefix
and
sys.prefix
.
If there is a file called pyvenv.cfg
in the same directory as
sys.executable
or one directory up, python looks at it. Different
OSes do different things with this file.
One of the values in this config file that python looks for is
the configuration option home = <DIRECTORY>
. Python will use this directory instead of the directory containing sys.executable
when it dynamically sets the initial value of sys.prefix
later. If the applocal = true
setting appears in the
pyvenv.cfg
file on Windows, but not the home = <DIRECTORY>
setting,
then sys.prefix
will be set to the directory containing sys.executable
.
Next, the PYTHONHOME
environment variable is examined. On Linux and Mac,
sys.prefix
and sys.exec_prefix
are set to the PYTHONHOME
environment variable, if
it exists, superseding any home = <DIRECTORY>
setting in pyvenv.cfg
. On Windows,
sys.prefix
and sys.exec_prefix
is set to the PYTHONHOME
environment variable,
if it exists, unless a home = <DIRECTORY>
setting is present in pyvenv.cfg
,
which is used instead.
Otherwise, these sys.prefix
and sys.exec_prefix
are found by walking backwards
from the location of sys.executable
, or the home
directory given by pyvenv.cfg
if any.
If the file lib/python<version>/dyn-load
is found in that directory
or any of its parent directories, that directory is set to be to be
sys.exec_prefix
on Linux or Mac. If the file
lib/python<version>/os.py
is is found in the directory or any of its
subdirectories, that directory is set to be sys.prefix
on Linux,
Mac, and Windows, with sys.exec_prefix
set to the same value as
sys.prefix
on Windows. This entire step is skipped on Windows if
applocal = true
is set. Either the directory of sys.executable
is
used or, if home
is set in pyvenv.cfg
, that is used instead for
the initial value of sys.prefix
.
If it can't find these "landmark" files or sys.prefix
hasn't been
found yet, then python sets sys.prefix
to a "fallback"
value. Linux and Mac, for example, use pre-compiled defaults as the
values of sys.prefix
and sys.exec_prefix
. Windows waits
until sys.path
is fully figured out to set a fallback value for
sys.prefix
.
Then, (what you've all been waiting for,) python determines the initial values
that are to be contained in sys.path
.
sys.path
.
On Windows, this is always the empty string, which tells python to
use the full path where the script is located instead.sys.path
, unless you're
on Windows and applocal
is set to true in pyvenv.cfg
.<prefix>/lib/python35.zip
on Linux/Mac and
os.path.join(os.dirname(sys.executable), "python.zip")
on Windows, is added to sys.path
.applocal = true
was set in pyvenv.cfg
, then the contents of the subkeys of the registry key
HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\
are added, if any.applocal = true
was set in pyvenv.cfg
, and sys.prefix
could not be found,
then the core contents of the of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\
is added, if it exists;applocal = true
was set in pyvenv.cfg
, then the contents of the subkeys of the registry key
HK_LOCAL_MACHINE\Software\Python\PythonCore\<DLLVersion>\PythonPath\
are added, if any.applocal = true
was set in pyvenv.cfg
, and sys.prefix
could not be found,
then the core contents of the of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\
is added, if it exists;sys.prefix
.sys.exec_prefix
is added. On Windows, the directory
which was used (or would have been used) to search dynamically for sys.prefix
is
added.At this stage on Windows, if no prefix was found, then python will try to
determine it by searching all the directories in sys.path
for the landmark files,
as it tried to do with the directory of sys.executable
previously, until it finds something.
If it doesn't, sys.prefix
is left blank.
Finally, after all this, Python loads the site
module, which adds stuff yet further to sys.path
:
It starts by constructing up to four directories from a head and a tail part. For the head part, it uses
sys.prefix
andsys.exec_prefix
; empty heads are skipped. For the tail part, it uses the empty string and thenlib/site-packages
(on Windows) orlib/pythonX.Y/site-packages
and thenlib/site-python
(on Unix and Macintosh). For each of the distinct head-tail combinations, it sees if it refers to an existing directory, and if so, adds it to sys.path and also inspects the newly added path for configuration files.
Based on the answer of Stephen Cagle I added support for nested test modules.
import fnmatch
import os
import unittest
def all_test_modules(root_dir, pattern):
test_file_names = all_files_in(root_dir, pattern)
return [path_to_module(str) for str in test_file_names]
def all_files_in(root_dir, pattern):
matches = []
for root, dirnames, filenames in os.walk(root_dir):
for filename in fnmatch.filter(filenames, pattern):
matches.append(os.path.join(root, filename))
return matches
def path_to_module(py_file):
return strip_leading_dots( \
replace_slash_by_dot( \
strip_extension(py_file)))
def strip_extension(py_file):
return py_file[0:len(py_file) - len('.py')]
def replace_slash_by_dot(str):
return str.replace('\\', '.').replace('/', '.')
def strip_leading_dots(str):
while str.startswith('.'):
str = str[1:len(str)]
return str
module_names = all_test_modules('.', '*Tests.py')
suites = [unittest.defaultTestLoader.loadTestsFromName(mname) for mname
in module_names]
testSuite = unittest.TestSuite(suites)
runner = unittest.TextTestRunner(verbosity=1)
runner.run(testSuite)
The code searches all subdirectories of .
for *Tests.py
files which are then loaded. It expects each *Tests.py
to contain a single class *Tests(unittest.TestCase)
which is loaded in turn and executed one after another.
This works with arbitrary deep nesting of directories/modules, but each directory in between needs to contain an empty __init__.py
file at least. This allows the test to load the nested modules by replacing slashes (or backslashes) by dots (see replace_slash_by_dot
).
Using suggestions from answers on this page and this other one (ANT_HOME is set incorrectly or ant could not be located), the ultimate fix was the following:
Adding a ANT_HOME environment variable that points to the ROOT directory of your Apache ant directory location. (Not the bin sub-dir!)
Adding a JAVA_HOME environment variable that points to the ROOT directory of your Java JDK (or SDK) directory location. (NOT your JRE and not the bin sub-dir!)
Appended %ANT_HOME%\bin;%JAVA_HOME%\bin to the PATH environment variable.
Make sure you close any command window(s) that were open prior to the changes above. Only command windows opened after the changes will have the updated environment variables.
This is Similar to what Meritt has posted earlier. just posting the complete code
string sJSON;
Dictionary<string, string> aa1 = new Dictionary<string, string>();
aa1.Add("one", "1"); aa1.Add("two", "2"); aa1.Add("three", "3");
Console.Write("JSON form of Person object: ");
sJSON = WriteFromObject(aa1);
Console.WriteLine(sJSON);
Dictionary<string, string> aaret = new Dictionary<string, string>();
aaret = ReadToObject<Dictionary<string, string>>(sJSON);
public static string WriteFromObject(object obj)
{
byte[] json;
//Create a stream to serialize the object to.
using (MemoryStream ms = new MemoryStream())
{
// Serializer the object to the stream.
DataContractJsonSerializer ser = new DataContractJsonSerializer(obj.GetType());
ser.WriteObject(ms, obj);
json = ms.ToArray();
ms.Close();
}
return Encoding.UTF8.GetString(json, 0, json.Length);
}
// Deserialize a JSON stream to object.
public static T ReadToObject<T>(string json) where T : class, new()
{
T deserializedObject = new T();
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
{
DataContractJsonSerializer ser = new DataContractJsonSerializer(deserializedObject.GetType());
deserializedObject = ser.ReadObject(ms) as T;
ms.Close();
}
return deserializedObject;
}
Lets say your data is -
data = {'a': [ [1, 2] ], 'b': [ [3, 4] ],'c':[ [5,6]] }
You can use the data.items()
method to get the dictionary elements. Note, in django templates we do NOT put ()
. Also some users mentioned values[0]
does not work, if that is the case then try values.items
.
<table>
<tr>
<td>a</td>
<td>b</td>
<td>c</td>
</tr>
{% for key, values in data.items %}
<tr>
<td>{{key}}</td>
{% for v in values[0] %}
<td>{{v}}</td>
{% endfor %}
</tr>
{% endfor %}
</table>
Am pretty sure you can extend this logic to your specific dict.
To iterate over dict keys in a sorted order - First we sort in python then iterate & render in django template.
return render_to_response('some_page.html', {'data': sorted(data.items())})
In template file:
{% for key, value in data %}
<tr>
<td> Key: {{ key }} </td>
<td> Value: {{ value }} </td>
</tr>
{% endfor %}
1) In your cellForRowAtIndexPath:
method, assign button tag as index:
cell.yourbutton.tag = indexPath.row;
2) Add target and action for your button as below:
[cell.yourbutton addTarget:self action:@selector(yourButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
3) Code actions based on index as below in ViewControler
:
-(void)yourButtonClicked:(UIButton*)sender
{
if (sender.tag == 0)
{
// Your code here
}
}
Updates for multiple Section:
You can check this link to detect button click in table view for multiple row and section.
One of the options is to use the Javascript.
Here is a quick reference where you can start from.
You can use a DecimalFormat, or String.format("%.2f", a);
Your example code is wrong and will throw a SyntaxError. You seem to have confused the syntax of creating an object Object
with creating an Array
.
The correct syntax would be: var arr = [ "abc", "def", "ghi" ];
To remove an item from the array, based on its value, use the splice method:
arr.splice(arr.indexOf("def"), 1);
To remove it by index, just refer directly to it:
arr.splice(1, 1);
The suggested answer by Loïc MICHEL blindly writes a new value to the TrustedHosts entry.
I believe, a better way would be to first query TrustedHosts.
As Jeffery Hicks posted in 2010, first query the TrustedHosts entry:
PS C:\> $current=(get-item WSMan:\localhost\Client\TrustedHosts).value
PS C:\> $current+=",testdsk23,alpha123"
PS C:\> set-item WSMan:\localhost\Client\TrustedHosts –value $current
Well, I simply could not find this (for me) mythical "Use dynamic ports" option. I have post screenshots.
On a more constructive note, I believe that the port numbers are to be found in the solution file AND CRUCIALLY cross referenced against the IIS Express config file
C:\Users\<username>\Documents\IISExpress\config\applicationhost.config
I tried editing the port number in just the solution file but strange things happened. I propose (no time yet) that it needs a consistent edit across both the solution file and the config file.
This is expected.
Refer to Javadocs for split
.
Splits this string around matches of the given regular expression.
This method works as if by invoking the two-argument split(java.lang.String,int) method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.
You don't need jQuery for that, you can do it with normal javascript:
http://www.w3schools.com/jsref/jsref_split.asp
var str = "a,b,c,d";
var res = str.split(","); // this returns an array
Use numeric(n,n) where n has enough resolution to round to 1.00. For instance:
declare @discount numeric(9,9)
, @quantity int
select @discount = 0.999999999
, @quantity = 10000
select convert(money, @discount * @quantity)
Perhaps the shortest possible ways to evaluate an expression into "10" without digits are:
+!+[] + [+[]]
// "10"
-~[] + [+[]]
// "10"
//========== Explanation ==========\\
+!+[]
: +[]
Converts to 0. !0
converts to true
. +true
converts to 1.
-~[]
= -(-1)
which is 1
[+[]]
: +[]
Converts to 0. [0]
is an array with a single element 0.
Then JS evaluates the 1 + [0]
, thus Number + Array
expression. Then the ECMA specification works: +
operator converts both operands to a string by calling the toString()/valueOf()
functions from the base Object
prototype. It operates as an additive function if both operands of an expression are numbers only. The trick is that arrays easily convert their elements into a concatenated string representation.
Some examples:
1 + {} // "1[object Object]"
1 + [] // "1"
1 + new Date() // "1Wed Jun 19 2013 12:13:25 GMT+0400 (Caucasus Standard Time)"
There's a nice exception that two Objects
addition results in NaN
:
[] + [] // ""
[1] + [2] // "12"
{} + {} // NaN
{a:1} + {b:2} // NaN
[1, {}] + [2, {}] // "1,[object Object]2,[object Object]"
You can also do it from command line much easily.
From command line run:
javadoc YourClassName.java
To batch generate docs for multiple Class:
javadoc *.java
Edit 2015
Someone has made a project on NPM with my solution: https://github.com/lovasoa/react-contenteditable
Edit 06/2016: I've just encoutered a new problem that occurs when the browser tries to "reformat" the html you just gave him, leading to component always re-rendering. See
Edit 07/2016: here's my production contentEditable implementation. It has some additional options over react-contenteditable
that you might want, including:
FakeRainBrigand's solution has worked quite fine for me for some time until I got new problems. ContentEditables are a pain, and are not really easy to deal with React...
This JSFiddle demonstrates the problem.
As you can see, when you type some characters and click on Clear
, the content is not cleared. This is because we try to reset the contenteditable to the last known virtual dom value.
So it seems that:
shouldComponentUpdate
to prevent caret position jumpsshouldComponentUpdate
this way.So you need an extra line so that whenever shouldComponentUpdate
returns yes, you are sure the DOM content is actually updated.
So the version here adds a componentDidUpdate
and becomes:
var ContentEditable = React.createClass({
render: function(){
return <div id="contenteditable"
onInput={this.emitChange}
onBlur={this.emitChange}
contentEditable
dangerouslySetInnerHTML={{__html: this.props.html}}></div>;
},
shouldComponentUpdate: function(nextProps){
return nextProps.html !== this.getDOMNode().innerHTML;
},
componentDidUpdate: function() {
if ( this.props.html !== this.getDOMNode().innerHTML ) {
this.getDOMNode().innerHTML = this.props.html;
}
},
emitChange: function(){
var html = this.getDOMNode().innerHTML;
if (this.props.onChange && html !== this.lastHtml) {
this.props.onChange({
target: {
value: html
}
});
}
this.lastHtml = html;
}
});
The Virtual dom stays outdated, and it may not be the most efficient code, but at least it does work :) My bug is resolved
Details:
1) If you put shouldComponentUpdate to avoid caret jumps, then the contenteditable never rerenders (at least on keystrokes)
2) If the component never rerenders on key stroke, then React keeps an outdated virtual dom for this contenteditable.
3) If React keeps an outdated version of the contenteditable in its virtual dom tree, then if you try to reset the contenteditable to the value outdated in the virtual dom, then during the virtual dom diff, React will compute that there are no changes to apply to the DOM!
This happens mostly when:
In SUSE Linux Enterprise Server (SLES) and openSUSE the global one is located at /etc/vimrc
.
To edit it, simply do vi /etc/vimrc
.
Using
xhrFields: { withCredentials:true }
as part of my jQuery ajax call was only part of the solution. I also needed to have the headers returned in the OPTIONS response from my resource:
Access-Control-Allow-Origin : http://www.wombling.com
Access-Control-Allow-Credentials : true
It was important that only one allowed "origin" was in the response header of the OPTIONS call and not "*". I achieved this by reading the origin from the request and populating it back into the response - probably circumventing the original reason for the restriction, but in my use case the security is not paramount.
I thought it worth explicitly mentioning the requirement for only one origin, as the W3C standard does allow for a space separated list -but Chrome doesn't! http://www.w3.org/TR/cors/#access-control-allow-origin-response-header NB the "in practice" bit.
If you are using unix, you need to write a shellscript to run you java batch first.
After that, in unix, you run this command "crontab -e
" to edit crontab script.
In order to configure crontab, please refer to this article http://www.thegeekstuff.com/2009/06/15-practical-crontab-examples/
Save your crontab setting. Then wait for the time to come, program will run automatically.
You have three options:
Style links to look like buttons using CSS.
Just look at the light blue "tags" under your question.
It is possible, even to give them a depressed appearance when clicked (using pseudo-classes like :active), without any scripting. Lots of major sites, such as Google, are starting to make buttons out of CSS styles these days anyway, scripting or not.
Put a separate <form> element around each one.
As you mentioned in the question. Easy and will definitely work without Javascript (or even CSS). But it adds a little extra code which may look untidy.
Rely on Javascript.
Which is what you said you didn't want to do.
1st preference external style sheet.
<span class="myClass">test</span>
css
.myClass
{
color:red;
}
2nd preference inline style
<span style="color:red">test</span>
<font>
as mentioned is deprecated.
To avoid AmbiguousMatchException
, I would rather say
objectToCheck.GetType().GetMethods().Count(m => m.Name == method) > 0
You can do the same for method parameters as well:
Method method = someClass.getDeclaredMethod("someMethod");
Type[] types = method.getGenericParameterTypes();
//Now assuming that the first parameter to the method is of type List<Integer>
ParameterizedType pType = (ParameterizedType) types[0];
Class<?> clazz = (Class<?>) pType.getActualTypeArguments()[0];
System.out.println(clazz); //prints out java.lang.Integer
Using "kill -9 [PID]" or "killall -9 node" worked for me where "kill -2 [PID]" did not work.
You can indeed run multiple animations simultaneously, but your example has two problems. First, the syntax you use only specifies one animation. The second style rule hides the first. You can specify two animations using syntax like this:
-webkit-animation-name: spin, scale
-webkit-animation-duration: 2s, 4s
as in this fiddle (where I replaced "scale" with "fade" due to the other problem explained below... Bear with me.): http://jsfiddle.net/rwaldin/fwk5bqt6/
Second, both of your animations alter the same CSS property (transform) of the same DOM element. I don't believe you can do that. You can specify two animations on different elements, the image and a container element perhaps. Just apply one of the animations to the container, as in this fiddle: http://jsfiddle.net/rwaldin/fwk5bqt6/2/
If you need to do it with a set number of columns, H.B.'s way is best. But if you don't know how many columns you are dealing with until runtime, then the below code [read: hack] will work. I am not sure if there is a better solution with an unknown number of columns. It took me two days working at it off and on to get it, so I'm sticking with it regardless.
C#
public class ValueToBrushConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
int input;
try
{
DataGridCell dgc = (DataGridCell)value;
System.Data.DataRowView rowView = (System.Data.DataRowView)dgc.DataContext;
input = (int)rowView.Row.ItemArray[dgc.Column.DisplayIndex];
}
catch (InvalidCastException e)
{
return DependencyProperty.UnsetValue;
}
switch (input)
{
case 1: return Brushes.Red;
case 2: return Brushes.White;
case 3: return Brushes.Blue;
default: return DependencyProperty.UnsetValue;
}
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotSupportedException();
}
}
XAML
<UserControl.Resources>
<conv:ValueToBrushConverter x:Key="ValueToBrushConverter"/>
<Style x:Key="CellStyle" TargetType="DataGridCell">
<Setter Property="Background" Value="{Binding RelativeSource={RelativeSource Self}, Converter={StaticResource ValueToBrushConverter}}" />
</Style>
</UserControl.Resources>
<DataGrid x:Name="dataGrid" CellStyle="{StaticResource CellStyle}">
</DataGrid>
var d = $('.text_div');
d.text(d.text().trim().replace(/contains/i, "hello everyone"));
At the risk of sounding obvious, always check the spelling of your forward class files. Sometimes XCode (at least XCode 4.3.2) will turn a declaration green that's actually camel cased incorrectly. Like in this example:
"_OBJC_CLASS_$_RadioKit", referenced from:
objc-class-ref in RadioPlayerViewController.o
If RadioKit was a class file and you make it a property of another file, in the interface declaration, you might see that
Radiokit *rk;
has "Radiokit" in green when the actual decalaration should be:
RadioKit *rk;
This error will also throw this type of error. Another example (in my case), is when you have _iPhone and _iphone extensions on your class names for universal apps. Once I changed the appropriate file from _iphone to the correct _iPhone, the errors went away.
You want to do more than just getState
. You want to react to changes in the store.
If you aren't using react-redux, you can do this:
function rerender() {
const state = store.getState();
render(
<div>
{ state.items.map((item) => <p> {item.title} </p> )}
</div>,
document.getElementById('app')
);
}
// subscribe to store
store.subscribe(rerender);
// do initial render
rerender();
// dispatch more actions and view will update
But better is to use react-redux. In this case you use the Provider like you mentioned, but then use connect to connect your component to the store.
Simple and neat with fontawesome
input[type=radio] {
-moz-appearance: none;
-webkit-appearance: none;
-o-appearance: none;
outline: none;
content: none;
margin-left: 5px;
}
input[type=radio]:before {
font-family: "FontAwesome";
content: "\f00c";
font-size: 25px;
color: transparent !important;
background: #fff;
width: 25px;
height: 25px;
border: 2px solid black;
margin-right: 5px;
}
input[type=radio]:checked:before {
color: black !important;
}
using position:fixed
alone is just fine when you don't have a header or logo at the top of your page. This solution will take into account the how far the window has scrolled, and moves the div when you scrolled past your header. It will then lock it back into place when you get to the top again.
if($(window).scrollTop() > Height_of_Header){
//begin to scroll
$("#div").css("position","fixed");
$("#div").css("top",0);
}
else{
//lock it back into place
$("#div").css("position","relative");
}
These are bitwise shift operators.
Quoting from the docs:
x << y
Returns x
with the bits shifted to the left by y places (and new bits on the right-hand-side are zeros). This is the same as multiplying x
by 2**y
.
x >> y
Returns x
with the bits shifted to the right by y places. This is the same as dividing x
by 2**y
.
First list the desired characters
$chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
Use the str_shuffle($string) function. This function will provide you a randomly shuffled string.
$alpha=substr(str_shuffle($chars), 0, 50);
50 is the Length of string.
Main is just like any other function and argc and argv are just like any other function arguments, the difference is that main is called from C Runtime and it passes the argument to main, But C Runtime is defined in c library and you cannot modify it, So if we do execute program on shell or through some IDE, we need a mechanism to pass the argument to main function so that your main function can behave differently on the runtime depending on your parameters. The parameters are argc , which gives the number of arguments and argv which is pointer to array of pointers, which holds the value as strings, this way you can pass any number of arguments without restricting it, it's the other way of implementing var args.
This is an option:
dbContext.Entry(entity).State = EntityState.Detached;
You can accomplish this using man-in-the-middle techniques with dynamic SSL generation. Take a look at mitmproxy - it's a Python based, SSL-capable MITM proxy.
I personally think this is the prettiest version:
a = [2,3,4,5,6,7,8,9,0]
xyz = [0,12,4,6,242,7,9]
for x in filter(lambda w: w in a, xyz):
print x
if you are very keen on avoiding to use lambda you can use partial function application and use the operator module (that provides functions of most operators).
https://docs.python.org/2/library/operator.html#module-operator
from operator import contains
from functools import partial
print(list(filter(partial(contains, a), xyz)))
private float getDistance(double lat1, double lon1, double lat2, double lon2) {
float[] distance = new float[2];
Location.distanceBetween(lat1, lon1, lat2, lon2, distance);
return distance[0];
}
Using JQuery would take care of that browser inconsistency. With the jquery library included in your project simply write:
$('#yourDivName').html('yourtHTML');
You may also consider using:
$('#yourDivName').append('yourtHTML');
This will add your gallery as the last item in the selected div. Or:
$('#yourDivName').prepend('yourtHTML');
This will add it as the first item in the selected div.
See the JQuery docs for these functions:
use an infinity loop like what you have originally done. Its cleanest and you can incorporate many conditions as you wish
while 1:
if condition1 and condition2:
break
...
...
if condition3: break
...
...
you need length() function
select length(customer_name) from ar.ra_customers
Why not do this (with minor adjustment for body padding/margins)
<script>
var oF = document.getElementById("iframe1");
oF.style.height = document.body.clientHeight - oF.offsetTop - 0;
</script>
You can stick optional whitespace characters \s*
in between every other character in your regex. Although granted, it will get a bit lengthy.
/cats/
-> /c\s*a\s*t\s*s/
Kinda related, you might want to look at Shuttle (http://fitztrev.github.io/shuttle/), it's a SSH shortcut menu for OSX.
This can happen when the cordova was installed globally on a different version of the node.
Being necessary to manually delete yourself as suggested in the previous comment:
which cordova
it will output something like this
/usr/local/bin/
then removing by
rm -rf /usr/local/bin/cordova
Basically, root volume (your entire virtual system disk) is ephemeral, but only if you choose to create AMI backed by Amazon EC2 instance store.
If you choose to create AMI backed by EBS then your root volume is backed by EBS and everything you have on your root volume will be saved between reboots.
If you are not sure what type of volume you have, look under EC2->Elastic Block Store->Volumes in your AWS console and if your AMI root volume is listed there then you are safe. Also, if you go to EC2->Instances and then look under column "Root device type" of your instance and if it says "ebs", then you don't have to worry about data on your root device.
More details here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/RootDeviceStorage.html
Use fetch instead of XHR,then the request will not be prelighted even it's cross-domained.
#ck-button:hover {
background:red;
}
Fiddle: http://jsfiddle.net/zAFND/4/
Building off of Fabio's answer, I created two functions that will probably be useful for anyone stumbling upon this question. With these two functions, you can call insertParam()
with a key and value as an argument. It will either add the URL parameter or, if a query param already exists with the same key, it will change that parameter to the new value:
//function to remove query params from a URL
function removeURLParameter(url, parameter) {
//better to use l.search if you have a location/link object
var urlparts= url.split('?');
if (urlparts.length>=2) {
var prefix= encodeURIComponent(parameter)+'=';
var pars= urlparts[1].split(/[&;]/g);
//reverse iteration as may be destructive
for (var i= pars.length; i-- > 0;) {
//idiom for string.startsWith
if (pars[i].lastIndexOf(prefix, 0) !== -1) {
pars.splice(i, 1);
}
}
url= urlparts[0] + (pars.length > 0 ? '?' + pars.join('&') : "");
return url;
} else {
return url;
}
}
//function to add/update query params
function insertParam(key, value) {
if (history.pushState) {
// var newurl = window.location.protocol + "//" + window.location.host + search.pathname + '?myNewUrlQuery=1';
var currentUrlWithOutHash = window.location.origin + window.location.pathname + window.location.search;
var hash = window.location.hash
//remove any param for the same key
var currentUrlWithOutHash = removeURLParameter(currentUrlWithOutHash, key);
//figure out if we need to add the param with a ? or a &
var queryStart;
if(currentUrlWithOutHash.indexOf('?') !== -1){
queryStart = '&';
} else {
queryStart = '?';
}
var newurl = currentUrlWithOutHash + queryStart + key + '=' + value + hash
window.history.pushState({path:newurl},'',newurl);
}
}
Problem is due to problem in my applicationContext.xml vs spring-servlet.xml - it was scoping issue between the beans.
pedjaradenkovic kindly pointed me to an existing resource: Spring @Value annotation in @Controller class not evaluating to value inside properties file and Spring 3.0.5 doesn't evaluate @Value annotation from properties
I am surprised only one other answer (by Ramana Reddy) suggested to add line numbers to the output. The following searches for the required line number and colours the output.
file=FILE
lineno=LINENO
wb="107"; bf="30;1"; rb="101"; yb="103"
cat -n ${file} | { GREP_COLORS="se=${wb};${bf}:cx=${wb};${bf}:ms=${rb};${bf}:sl=${yb};${bf}" grep --color -C 10 "^[[:space:]]\\+${lineno}[[:space:]]"; }
Yes using Option Explicit
is a good habit. Using .Select
however is not :) it reduces the speed of the code. Also fully justify sheet names else the code will always run for the Activesheet
which might not be what you actually wanted.
Is this what you are trying?
Option Explicit
Sub Sample()
Dim lastRow As Long, i As Long
Dim CopyRange As Range
'~~> Change Sheet1 to relevant sheet name
With Sheets("Sheet1")
lastRow = .Range("A" & .Rows.Count).End(xlUp).Row
For i = 2 To lastRow
If Len(Trim(.Range("A" & i).Value)) <> 0 Then
If CopyRange Is Nothing Then
Set CopyRange = .Rows(i)
Else
Set CopyRange = Union(CopyRange, .Rows(i))
End If
Else
Exit For
End If
Next
If Not CopyRange Is Nothing Then
'~~> Change Sheet2 to relevant sheet name
CopyRange.Copy Sheets("Sheet2").Rows(1)
End If
End With
End Sub
NOTE
If if you have data from Row 2 till Row 10 and row 11 is blank and then you have data again from Row 12 then the above code will only copy data from Row 2 till Row 10
If you want to copy all rows which have data then use this code.
Option Explicit
Sub Sample()
Dim lastRow As Long, i As Long
Dim CopyRange As Range
'~~> Change Sheet1 to relevant sheet name
With Sheets("Sheet1")
lastRow = .Range("A" & .Rows.Count).End(xlUp).Row
For i = 2 To lastRow
If Len(Trim(.Range("A" & i).Value)) <> 0 Then
If CopyRange Is Nothing Then
Set CopyRange = .Rows(i)
Else
Set CopyRange = Union(CopyRange, .Rows(i))
End If
End If
Next
If Not CopyRange Is Nothing Then
'~~> Change Sheet2 to relevant sheet name
CopyRange.Copy Sheets("Sheet2").Rows(1)
End If
End With
End Sub
Hope this is what you wanted?
Sid
Check that your index is really datetime
, not str
Can be helpful:
data.index = pd.to_datetime(data['Index']).values
You can use a ViewPropertyAnimator with a slight twist. To collapse, scale the view to a height of 1 pixel, then hide it. To expand, show it, then expand it to its height.
private void collapse(final View view) {
view.setPivotY(0);
view.animate().scaleY(1/view.getHeight()).setDuration(1000).withEndAction(new Runnable() {
@Override public void run() {
view.setVisibility(GONE);
}
});
}
private void expand(View view, int height) {
float scaleFactor = height / view.getHeight();
view.setVisibility(VISIBLE);
view.setPivotY(0);
view.animate().scaleY(scaleFactor).setDuration(1000);
}
The pivot tells the view where to scale from, default is in the middle. The duration is optional (default = 1000). You can also set the interpolator to use, like .setInterpolator(new AccelerateDecelerateInterpolator())
After reading the other answers (First by @duncan-finney and then by @Marrs) I set out to find the change log that explains the idiomatic react-router 2.x way of solving this. The documentation on using location (which you need for queries) in components is actually contradicted by the actual code. So if you follow their advice, you get big angry warnings like this:
Warning: [react-router] `context.location` is deprecated, please use a route component's `props.location` instead.
It turns out that you cannot have a context property called location that uses the location type. But you can use a context property called loc that uses the location type. So the solution is a small modification on their source as follows:
const RouteComponent = React.createClass({
childContextTypes: {
loc: PropTypes.location
},
getChildContext() {
return { location: this.props.location }
}
});
const ChildComponent = React.createClass({
contextTypes: {
loc: PropTypes.location
},
render() {
console.log(this.context.loc);
return(<div>this.context.loc.query</div>);
}
});
You could also pass down only the parts of the location object you want in your children get the same benefit. It didn't change the warning to change to the object type. Hope that helps.
Yes you can insert but not as similar to SQL.
In SQL we can insert the row level data, but here you can insert by fields (columns).
During this you have to make sure target table and the query should have same datatype and same number of columns.
eg:
CREATE TABLE test(stu_name STRING,stu_id INT,stu_marks INT)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY ','
STORED AS TEXTFILE;
INSERT OVERWRITE TABLE test SELECT lang_name, lang_id, lang_legacy_id FROM export_table;
Lets see, numeric (3,2). That means you have 3 places for data and two of them are to the right of the decimal leaving only one to the left of the decimal. 15 has two places to the left of the decimal. BTW if you might have 100 as a value I'd increase that to numeric (5, 2)
Actually, I found a somewhat quirky way to do this. Add the protocol to your web.config, but inside a location element. Specify the webservice location as the path attribute, like so:
<location path="YourWebservice.asmx">
<system.web>
<webServices>
<protocols>
<add name="HttpGet"/>
<add name="HttpPost"/>
</protocols>
</webServices>
</system.web>
</location>
If you want to use asynchronous method you need to use callback function by $promise, here is example:
var Regions = $resource('mocks/regions.json');
$scope.regions = Regions.query();
$scope.regions.$promise.then(function (result) {
$scope.regions = result;
});
You should apply the following styles:
#button:active {
vertical-align: top;
padding: 8px 13px 6px;
}
This will give you the necessary effect, demo here.
For all your Swift-ers out there, this worked perfectly for me. It's notably one of the shorter ways to accomplish setting the title, as well:
override public func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "presentLineItem" {
print("Setting Title")
var vc = segue.destinationViewController as! LineItemsTableViewController
vc.navigationItem.title = "Line Item"
}
}
You can use simply pd.to_datetime(then)
and pandas will convert the date elements into ISO date format- [YYYY-MM-DD]
.
You can pass this as map/apply to use it in a dataframe/series too.
Note that it is now possible to use some of C++11 std::thread in the win32 threading mode. These header-only adapters worked out of the box for me: https://github.com/meganz/mingw-std-threads
From the revision history it looks like there is some recent attempt to make this a part of the mingw64 runtime.
Try replacing the appropriate lines with:
myStringArray[0][x-1] = "a string";
myStringArray[0][y-1] = "another string";
Your code is incorrect because the sub-arrays have a length of y
, and indexing starts at 0. So setting to myStringArray[0][y]
or myStringArray[0][x]
will fail because the indices x
and y
are out of bounds.
String[][] myStringArray = new String [x][y];
is the correct way to initialise a rectangular multidimensional array. If you want it to be jagged (each sub-array potentially has a different length) then you can use code similar to this answer. Note however that John's assertion that you have to create the sub-arrays manually is incorrect in the case where you want a perfectly rectangular multidimensional array.
How about just:
UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 20, 280, 32)];
textField.borderStyle = UITextBorderStyleRoundedRect;
[self addSubview:textField];
@Override
public void onBackPressed(){
MaterialAlertDialogBuilder alert = new MaterialAlertDialogBuilder(BorrowForm.this, MyTheme);
alert.setTitle("Confirmation");
alert.setCancelable(false);
alert.setMessage("App will exit. Data will not be saved. Continue?");
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast toast = Toast.makeText(BorrowForm.this, "App terminated.", Toast.LENGTH_SHORT);
toast.getView().setBackgroundColor(Color.parseColor("#273036"));
toast.setGravity(Gravity.CENTER_HORIZONTAL,0,0);
TextView toastMessage=(TextView) toast.getView().findViewById(android.R.id.message);
toastMessage.setTextColor(Color.WHITE);
toast.show();
finishAffinity();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
alert.setCancelable(false);
alert.show();
}
Dictionary<,> is the equivalent. While it doesn't have a Get(...) method, it does have an indexed property called Item which you can access in C# directly using index notation:
class Test {
Dictionary<int,String> entities;
public String getEntity(int code) {
return this.entities[code];
}
}
If you want to use a custom key type then you should consider implementing IEquatable<> and overriding Equals(object) and GetHashCode() unless the default (reference or struct) equality is sufficient for determining equality of keys. You should also make your key type immutable to prevent weird things happening if a key is mutated after it has been inserted into a dictionary (e.g. because the mutation caused its hash code to change).
Here's what we use:
using System;
using System.IO;
namespace crmachine.CommonClasses
{
public static class CRMPath
{
public static bool IsDirectory(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
string reason;
if (!IsValidPathString(path, out reason))
{
throw new ArgumentException(reason);
}
if (!(Directory.Exists(path) || File.Exists(path)))
{
throw new InvalidOperationException(string.Format("Could not find a part of the path '{0}'",path));
}
return (new System.IO.FileInfo(path).Attributes & FileAttributes.Directory) == FileAttributes.Directory;
}
public static bool IsValidPathString(string pathStringToTest, out string reasonForError)
{
reasonForError = "";
if (string.IsNullOrWhiteSpace(pathStringToTest))
{
reasonForError = "Path is Null or Whitespace.";
return false;
}
if (pathStringToTest.Length > CRMConst.MAXPATH) // MAXPATH == 260
{
reasonForError = "Length of path exceeds MAXPATH.";
return false;
}
if (PathContainsInvalidCharacters(pathStringToTest))
{
reasonForError = "Path contains invalid path characters.";
return false;
}
if (pathStringToTest == ":")
{
reasonForError = "Path consists of only a volume designator.";
return false;
}
if (pathStringToTest[0] == ':')
{
reasonForError = "Path begins with a volume designator.";
return false;
}
if (pathStringToTest.Contains(":") && pathStringToTest.IndexOf(':') != 1)
{
reasonForError = "Path contains a volume designator that is not part of a drive label.";
return false;
}
return true;
}
public static bool PathContainsInvalidCharacters(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
bool containedInvalidCharacters = false;
for (int i = 0; i < path.Length; i++)
{
int n = path[i];
if (
(n == 0x22) || // "
(n == 0x3c) || // <
(n == 0x3e) || // >
(n == 0x7c) || // |
(n < 0x20) // the control characters
)
{
containedInvalidCharacters = true;
}
}
return containedInvalidCharacters;
}
public static bool FilenameContainsInvalidCharacters(string filename)
{
if (filename == null)
{
throw new ArgumentNullException("filename");
}
bool containedInvalidCharacters = false;
for (int i = 0; i < filename.Length; i++)
{
int n = filename[i];
if (
(n == 0x22) || // "
(n == 0x3c) || // <
(n == 0x3e) || // >
(n == 0x7c) || // |
(n == 0x3a) || // :
(n == 0x2a) || // *
(n == 0x3f) || // ?
(n == 0x5c) || // \
(n == 0x2f) || // /
(n < 0x20) // the control characters
)
{
containedInvalidCharacters = true;
}
}
return containedInvalidCharacters;
}
}
}
Here's my solution if you created the repository with some default readme file
or license
git init
git add -A
git commit -m "initial commit"
git remote add origin https://<git-userName>@github.com/xyz.git //Add your username so it will avoid asking username each time before you push your code
git fetch
git pull https://github.com/xyz.git <branch>
git push origin <branch>
The struct's name is ReducedForm
; you need to make an object (instance of the struct
or class
) and use that. Do this:
ReducedForm MyReducedForm;
MyReducedForm.iSimplifiedNumerator = iNumerator/iGreatCommDivisor;
MyReducedForm.iSimplifiedDenominator = iDenominator/iGreatCommDivisor;
I prefer this method as it doesn't require manually emitting markup. I use this because I'm rendering Razor Pages to strings and sending them out via email, which is an environment where the white-space styling won't always work.
public static IHtmlContent RenderNewlines<TModel>(this IHtmlHelper<TModel> html, string content)
{
if (string.IsNullOrEmpty(content) || html is null)
{
return null;
}
TagBuilder brTag = new TagBuilder("br");
IHtmlContent br = brTag.RenderSelfClosingTag();
HtmlContentBuilder htmlContent = new HtmlContentBuilder();
// JAS: On the off chance a browser is using LF instead of CRLF we strip out CR before splitting on LF.
string lfContent = content.Replace("\r", string.Empty, StringComparison.InvariantCulture);
string[] lines = lfContent.Split('\n', StringSplitOptions.None);
foreach(string line in lines)
{
_ = htmlContent.Append(line);
_ = htmlContent.AppendHtml(br);
}
return htmlContent;
}
The locks are always taken at DB level:-
Oracle official Document:- To avoid conflicts during a transaction, a DBMS uses locks, mechanisms for blocking access by others to the data that is being accessed by the transaction. (Note that in auto-commit mode, where each statement is a transaction, locks are held for only one statement.) After a lock is set, it remains in force until the transaction is committed or rolled back. For example, a DBMS could lock a row of a table until updates to it have been committed. The effect of this lock would be to prevent a user from getting a dirty read, that is, reading a value before it is made permanent. (Accessing an updated value that has not been committed is considered a dirty read because it is possible for that value to be rolled back to its previous value. If you read a value that is later rolled back, you will have read an invalid value.)
How locks are set is determined by what is called a transaction isolation level, which can range from not supporting transactions at all to supporting transactions that enforce very strict access rules.
One example of a transaction isolation level is TRANSACTION_READ_COMMITTED, which will not allow a value to be accessed until after it has been committed. In other words, if the transaction isolation level is set to TRANSACTION_READ_COMMITTED, the DBMS does not allow dirty reads to occur. The interface Connection includes five values that represent the transaction isolation levels you can use in JDBC.
With the introduction of (i|android|windows)phones, things have changed, and to get a correct and complete solution that works on any device is really time-consuming.
You can have a peek at https://realfavicongenerator.net/favicon_compatibility or http://caniuse.com/#search=favicon to get an idea on the best way to get something that works on any device.
You should have a look at http://realfavicongenerator.net/ to automate a large part of this work, and probably at https://github.com/audreyr/favicon-cheat-sheet to understand how it works (even if this latter resource hasn't been updated in a loooong time).
One complete solution requires to add to you header the following (with the corresponding pictures and files, of course) :
<link rel="shortcut icon" href="favicon.ico">
<link rel="apple-touch-icon" sizes="57x57" href="apple-touch-icon-57x57.png">
<link rel="apple-touch-icon" sizes="114x114" href="apple-touch-icon-114x114.png">
<link rel="apple-touch-icon" sizes="72x72" href="apple-touch-icon-72x72.png">
<link rel="apple-touch-icon" sizes="144x144" href="apple-touch-icon-144x144.png">
<link rel="apple-touch-icon" sizes="60x60" href="apple-touch-icon-60x60.png">
<link rel="apple-touch-icon" sizes="120x120" href="apple-touch-icon-120x120.png">
<link rel="apple-touch-icon" sizes="76x76" href="apple-touch-icon-76x76.png">
<link rel="apple-touch-icon" sizes="152x152" href="apple-touch-icon-152x152.png">
<link rel="apple-touch-icon" sizes="180x180" href="apple-touch-icon-180x180.png">
<link rel="icon" type="image/png" href="favicon-192x192.png" sizes="192x192">
<link rel="icon" type="image/png" href="favicon-160x160.png" sizes="160x160">
<link rel="icon" type="image/png" href="favicon-96x96.png" sizes="96x96">
<link rel="icon" type="image/png" href="favicon-16x16.png" sizes="16x16">
<link rel="icon" type="image/png" href="favicon-32x32.png" sizes="32x32">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="mstile-144x144.png">
<meta name="msapplication-config" content="browserconfig.xml">
In June 2016, RealFaviconGenerator claimed that the following 5 lines of code were supporting as many devices as the previous 18 lines:
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32">
<link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16">
<link rel="manifest" href="/manifest.json">
<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#5bbad5">
<meta name="theme-color" content="#ffffff">
http uses port 80, and understandably, your internet browser will automatically use that port when you type in an address - unless you specify another port. Now, when running a web server on your computer, you need to access that server somehow - and since port 80 is already busy, you need to use a different port to successfully connect to it. Although any open port is fair game, usually such a server is configured to use port 8080, hence when accessing your server you type in:
http:// (protocol) localhost (your computer) :8080 (port 8080) / (path pointing to the root of the public folder of your server)
I think of it this way, encapsulation is hiding the way something gets done. This can be one or many actions.
Abstraction is related to "why" I am encapsulating it the first place.
I am basically telling the client "You don't need to know much about how I process the payment and calculate shipping, etc. I just want you to tell me you want to 'Checkout' and I will take care of the details for you."
This way I have encapsulated the details by generalizing (abstracting) into the Checkout request.
I really think that abstracting and encapsulation go together.
isset() is fine for top level, but empty() is much more useful to find whether nested values are set. Eg:
if(isset($json['foo'] && isset($json['foo']['bar'])) {
$value = $json['foo']['bar']
}
Or:
if (!empty($json['foo']['bar']) {
$value = $json['foo']['bar']
}
You can use the dangerouslySetInnerHTML
property to inject arbitrary HTML:
// Assume from another require()'ed module:_x000D_
var html = '<h1>Hello, world!</h1>'_x000D_
_x000D_
var MyComponent = React.createClass({_x000D_
render: function() {_x000D_
return React.createElement("h1", {dangerouslySetInnerHTML: {__html: html}})_x000D_
}_x000D_
})_x000D_
_x000D_
ReactDOM.render(React.createElement(MyComponent), document.getElementById('app'))
_x000D_
<script src="https://fb.me/react-0.14.3.min.js"></script>_x000D_
<script src="https://fb.me/react-dom-0.14.3.min.js"></script>_x000D_
<div id="app"></div>
_x000D_
You could even componentize this template behavior (untested):
class TemplateComponent extends React.Component {
constructor(props) {
super(props)
this.html = require(props.template)
}
render() {
return <div dangerouslySetInnerHTML={{__html: this.html}}/>
}
}
TemplateComponent.propTypes = {
template: React.PropTypes.string.isRequired
}
// use like
<TemplateComponent template='./template.html'/>
And with this, template.html
(in the same directory) looks something like (again, untested):
// ./template.html
module.exports = '<h1>Hello, world!</h1>'
The URL is relative to the location of the CSS file, so this should work for you:
url('../../images/image.jpg')
The relative URL goes two folders back, and then to the images
folder - it should work for both cases, as long as the structure is the same.
From https://www.w3.org/TR/CSS1/#url:
Partial URLs are interpreted relative to the source of the style sheet, not relative to the document
Although not exactly answering the question as formulated, but if you need or can take the end result as string you can also use
string s = Char.ConvertFromUtf32(56);
which will give you surrogate UTF-16 pairs if needed, protecting you if you are out side of the BMP.
REPLACE(REPLACE(a.CUST_ADDRESS1,CHR(10),' '),CHR(13),' ') as ADDRESS
You should check the EOF after reading from file.
fscanf_s // read from file
while(condition) // check EOF
{
fscanf_s // read from file
}
While this may be an old question, the problem is still occurring these days, and the exact question is still not answered properly.
It is important to note that some projects have multiple classes with a main method.
In my case, I could run the project via the main class, but I could not run a particular other class that had a main method. The only thing that helped me was refactoring the class and renaming it. I've tried:
The only thing that let me run this class is renaming it permanently. I think this must be some kind of a NetBeans bug.
Edit: Another thing that did help was completely uninstall Netbeans, wipe cache and any configuration files. It so happened that a newer Netbeans version was available so I installed it. But the old one would have probably worked too.
Not sure this is the best way, but you can certainly replace the tick labels like this:
import matplotlib.pyplot as plt
x = range(10)
y = range(10)
plt.plot(x,y)
plt.xticks(x," ")
plt.show()
In Python 3.4 this generates a simple line plot with no tick labels on the x-axis. A simple example is here: http://matplotlib.org/examples/ticks_and_spines/ticklabels_demo_rotation.html
This related question also has some better suggestions: Hiding axis text in matplotlib plots
I'm new to python. Your mileage may vary in earlier versions. Maybe others can help?
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
_x000D_
.tree-view-com ul li {_x000D_
position: relative;_x000D_
list-style: none;_x000D_
}_x000D_
.tree-view-com .tree-view-child > li{_x000D_
padding-bottom: 30px;_x000D_
}_x000D_
.tree-view-com .tree-view-child > li:last-of-type{_x000D_
padding-bottom: 0px;_x000D_
}_x000D_
_x000D_
.tree-view-com ul li a .c-icon {_x000D_
margin-right: 10px;_x000D_
position: relative;_x000D_
top: 2px;_x000D_
}_x000D_
.tree-view-com ul > li > ul {_x000D_
margin-top: 20px;_x000D_
position: relative;_x000D_
}_x000D_
.tree-view-com > ul > li:before {_x000D_
content: "";_x000D_
border-left: 1px dashed #ccc;_x000D_
position: absolute;_x000D_
height: calc(100% - 30px - 5px);_x000D_
z-index: 1;_x000D_
left: 8px;_x000D_
top: 30px;_x000D_
}_x000D_
.tree-view-com > ul > li > ul > li:before {_x000D_
content: "";_x000D_
border-top: 1px dashed #ccc;_x000D_
position: absolute;_x000D_
width: 25px;_x000D_
left: -32px;_x000D_
top: 12px;_x000D_
}
_x000D_
<div class="tree-view-com">_x000D_
<ul class="tree-view-parent">_x000D_
<li>_x000D_
<a href=""><i class="fa fa-folder c-icon c-icon-list" aria-hidden="true"></i> folder</a>_x000D_
<ul class="tree-view-child">_x000D_
<li>_x000D_
<a href="" class="document-title">_x000D_
<i class="fa fa-folder c-icon" aria-hidden="true"></i>_x000D_
sub folder 1_x000D_
</a>_x000D_
</li>_x000D_
<li>_x000D_
<a href="" class="document-title">_x000D_
<i class="fa fa-folder c-icon" aria-hidden="true"></i>_x000D_
sub folder 2_x000D_
</a>_x000D_
</li>_x000D_
<li>_x000D_
<a href="" class="document-title">_x000D_
<i class="fa fa-folder c-icon" aria-hidden="true"></i>_x000D_
sub folder 3_x000D_
</a>_x000D_
</li>_x000D_
</ul>_x000D_
</li>_x000D_
</ul>_x000D_
</div>
_x000D_
If you have a mixture of formats in your date, don't forget to set infer_datetime_format=True
to make life easier.
df['date'] = pd.to_datetime(df['date'], infer_datetime_format=True)
Source: pd.to_datetime
or if you want a customized approach:
def autoconvert_datetime(value):
formats = ['%m/%d/%Y', '%m-%d-%y'] # formats to try
result_format = '%d-%m-%Y' # output format
for dt_format in formats:
try:
dt_obj = datetime.strptime(value, dt_format)
return dt_obj.strftime(result_format)
except Exception as e: # throws exception when format doesn't match
pass
return value # let it be if it doesn't match
df['date'] = df['date'].apply(autoconvert_datetime)
(This is paraphrased from the MS Access help files. I'm sure XL has something similar.) Basically, TimerInterval is a form-level property. Once set, use the sub Form_Timer to carry out your intended action.
Sub Form_Load()
Me.TimerInterval = 1000 '1000 = 1 second
End Sub
Sub Form_Timer()
'Do Stuff
End Sub
DAO provides abstraction on database/data files or any other persistence mechanism so that, persistence layer could be manipulated without knowing its implementation details.
Whereas in Repository classes, multiple DAO classes can be used inside a single Repository method to get an operation done from "app perspective". So, instead of using multiple DAO at Domain layer, use repository to get it done. Repository is a layer which may contain some application logic like: If data is available in in-memory cache then fetch it from cache otherwise, fetch data from network and store it in in-memory cache for next time retrieval.
Have you updated the firmware version of the iPhone you are testing on?
Use Test-Path:
if (!(Test-Path $exactadminfile) -and !(Test-Path $userfile)) {
Write-Warning "$userFile absent from both locations"
}
Placing the above code in your ForEach
loop should do what you want
I want to correct little bit the above code
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(
this, mDrawerLayout, mToolbar,
R.string.navigation_drawer_open, R.string.navigation_drawer_close
);
mDrawerLayout.setDrawerListener(mDrawerToggle);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
and all the other things will remain same...
For those who are having problem Drawerlayout
overlaying toolbar
add android:layout_marginTop="?attr/actionBarSize"
to root layout of drawer content
import csv
with open('filepath/filename.csv', "rt", encoding='ascii') as infile:
read = csv.reader(infile)
for row in read :
print (row)
This will solve your problem. Don't forget to give the encoding.
Based on github issue #620, it looks like you'll soon be able to do the following:
df[df['A'].str.contains("hello")]
Update: vectorized string methods (i.e., Series.str) are available in pandas 0.8.1 and up.
A "program" in general, is a sequence of instructions written so that a computer can perform certain task.
A "script" is code written in a scripting language. A scripting language is nothing but a type of programming language in which we can write code to control another software application.
In fact, programming languages are of two types:
a. Scripting Language
b. Compiled Language
Please read this: Scripting and Compiled Languages
I guess problem is in width attributes in table and td remove 'px' for example
<table border="0" cellpadding="0" cellspacing="0" width="580px" style="background-color: #0290ba;">
Should be
<table border="0" cellpadding="0" cellspacing="0" width="580" style="background-color: #0290ba;">
#include <windows.h>
double PCFreq = 0.0;
__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
QueryPerformanceCounter(&li);
CounterStart = li.QuadPart;
}
double GetCounter()
{
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
return double(li.QuadPart-CounterStart)/PCFreq;
}
int main()
{
StartCounter();
Sleep(1000);
cout << GetCounter() <<"\n";
return 0;
}
This program should output a number close to 1000 (windows sleep isn't that accurate, but it should be like 999).
The StartCounter()
function records the number of ticks the performance counter has in the CounterStart
variable. The GetCounter()
function returns the number of milliseconds since StartCounter()
was last called as a double, so if GetCounter()
returns 0.001 then it has been about 1 microsecond since StartCounter()
was called.
If you want to have the timer use seconds instead then change
PCFreq = double(li.QuadPart)/1000.0;
to
PCFreq = double(li.QuadPart);
or if you want microseconds then use
PCFreq = double(li.QuadPart)/1000000.0;
But really it's about convenience since it returns a double.
I think that would be better if we use directly the split function
String toSplit = "/abc/def/ghfj.doc";
String result[] = toSplit.split("/");
String returnValue = result[result.length - 1]; //equals "ghfj.doc"
You probably want to use a CASE
expression.
They look like this:
SELECT col1, col2, (case when (action = 2 and state = 0)
THEN
1
ELSE
0
END)
as state from tbl1;
you can use background-origin:padding-box; and then add some padding where you want, for example: #logo {background-image: url(your/image.jpg); background-origin:padding-box; padding-left: 15%;}
This way you attach the image to the div padding box that contains it so you can position it wherever you want.
By all means, please use set()
to create an empty set.
But, if you want to impress people, tell them that you can create an empty set using literals and *
with Python >= 3.5 (see PEP 448) by doing:
>>> s = {*()} # or {*{}} or {*[]}
>>> print(s)
set()
this is basically a more condensed way of doing {_ for _ in ()}
, but, don't do this.
I was able to figure it out by following the answer in this thread: https://stackoverflow.com/a/8968495/1543447
Basically, I renamed all values, function names, and element names to different values so they wouldn't conflict - and it worked!
It's kind of a pain to position, but you could use 1px
wide divs as lines and position and rotate them appropriately.
<div class="box" id="box1"></div>
<div class="box" id="box2"></div>
<div class="box" id="box3"></div>
<div class="line" id="line1"></div>
<div class="line" id="line2"></div>
.box {
border: 1px solid black;
background-color: #ccc;
width: 100px;
height: 100px;
position: absolute;
}
.line {
width: 1px;
height: 100px;
background-color: black;
position: absolute;
}
#box1 {
top: 0;
left: 0;
}
#box2 {
top: 200px;
left: 0;
}
#box3 {
top: 250px;
left: 200px;
}
#line1 {
top: 100px;
left: 50px;
}
#line2 {
top: 220px;
left: 150px;
height: 115px;
transform: rotate(120deg);
-webkit-transform: rotate(120deg);
-ms-transform: rotate(120deg);
}
Use git rebase --abort
. From the official Linux kernel documentation for git rebase
:
git rebase --continue | --skip | --abort | --edit-todo
The getPosts()
function seems to be expecting $con
to be global, but you're not declaring it as such.
A lot of programmers regard bald global variables as a "code smell". The alternative at the other end of the scale is to always pass around the connection resource. Partway between the two is a singleton call that always returns the same resource handle.
You could use the undocumented
DBCC LOG(databasename, typeofoutput)
where typeofoutput:
0: Return only the minimum of information for each operation -- the operation, its context and the transaction ID. (Default)
1: As 0, but also retrieve any flags and the log record length.
2: As 1, but also retrieve the object name, index name, page ID and slot ID.
3: Full informational dump of each operation.
4: As 3 but includes a hex dump of the current transaction log row.
For example, DBCC LOG(database, 1)
You could also try fn_dblog.
For rolling back a transaction using the transaction log I would take a look at Stack Overflow post Rollback transaction using transaction log.
It is the same as in eclipse:
Ctrl + Shift + X
Ctrl + Shift + Y
I like the xargs
solution, but if it's important to not collapse spaces, then one might instead do:
sed ':b;$!{N;bb};s/\n/ /g'
That will replace newlines for spaces, without substituting the last line terminator like tr '\n' ' '
would.
This also allows you to use other joining strings besides a space, like a comma, etc, something that xargs
cannot do:
$ seq 1 5 | sed ':b;$!{N;bb};s/\n/,/g'
1,2,3,4,5
The Javadoc for String reveals that String.split()
is what you're looking for in regard to explode
.
Java does not include a "implode" of "join" equivalent. Rather than including a giant external dependency for a simple function as the other answers suggest, you may just want to write a couple lines of code. There's a number of ways to accomplish that; using a StringBuilder
is one:
String foo = "This,that,other";
String[] split = foo.split(",");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < split.length; i++) {
sb.append(split[i]);
if (i != split.length - 1) {
sb.append(" ");
}
}
String joined = sb.toString();
The easiest way would be to create a new (simple) Maven project using the "new project" wizard. You can then migrate your source into the Maven folder structure + the auto generated POM file.
jQuery to check for checked? Really?
if(!this.checked) {
Don't use a bazooka to do a razor's job.
_GET accesses query string variables, test is not a querystring variable (PHP does not process the JS in any way). You need to rethink. You could make a php variable $test, and do something like:
<?php
$test = "tester";
?>
<script type="text/javascript" charset="utf-8">
var test = "<?php echo $test?>";
</script>
<?php
echo $test;
?>
Of course, I don't know why you want this, so I'm not sure the best solution.
EDIT: As others have noted, if the JavaScript variable is really generated on the client, you will need AJAX or a form to send it to the server.
You don't need to have static
in function definition
This would do the job:
number=int(raw_input("Enter a number to see if its prime:"))
if number <= 1:
print "number is not prime"
else:
a=2
check = True
while a != number:
if number%a == 0:
print "Number is not prime"
check = False
break
a+=1
if check == True:
print "Number is prime"
In my case the localization not worked cause of '-' symbol in the name. Example: "aero-Info.plist" And localized files: "aero-InfoPlist.strings" and "aeroInfoPlist.strings" did not work.
select pg_get_viewdef('viewname', true)
A list of all those functions is available in the manual:
http://www.postgresql.org/docs/current/static/functions-info.html
If you want plain C exports, use a C project not C++. C++ DLLs rely on name-mangling for all the C++isms (namespaces etc...). You can compile your code as C by going into your project settings under C/C++->Advanced, there is an option "Compile As" which corresponds to the compiler switches /TP and /TC.
If you still want to use C++ to write the internals of your lib but export some functions unmangled for use outside C++, see the second section below.
What you really want to do is define a conditional macro in a header that will be included in all of the source files in your DLL project:
#ifdef LIBRARY_EXPORTS
# define LIBRARY_API __declspec(dllexport)
#else
# define LIBRARY_API __declspec(dllimport)
#endif
Then on a function that you want to be exported you use LIBRARY_API
:
LIBRARY_API int GetCoolInteger();
In your library build project create a define LIBRARY_EXPORTS
this will cause your functions to be exported for your DLL build.
Since LIBRARY_EXPORTS
will not be defined in a project consuming the DLL, when that project includes the header file of your library all of the functions will be imported instead.
If your library is to be cross-platform you can define LIBRARY_API as nothing when not on Windows:
#ifdef _WIN32
# ifdef LIBRARY_EXPORTS
# define LIBRARY_API __declspec(dllexport)
# else
# define LIBRARY_API __declspec(dllimport)
# endif
#elif
# define LIBRARY_API
#endif
When using dllexport/dllimport you do not need to use DEF files, if you use DEF files you do not need to use dllexport/dllimport. The two methods accomplish the same task different ways, I believe that dllexport/dllimport is the recommended method out of the two.
If you need this to use LoadLibrary and GetProcAddress, or maybe importing from another language (i.e PInvoke from .NET, or FFI in Python/R etc) you can use extern "C"
inline with your dllexport to tell the C++ compiler not to mangle the names. And since we are using GetProcAddress instead of dllimport we don't need to do the ifdef dance from above, just a simple dllexport:
The Code:
#define EXTERN_DLL_EXPORT extern "C" __declspec(dllexport)
EXTERN_DLL_EXPORT int getEngineVersion() {
return 1;
}
EXTERN_DLL_EXPORT void registerPlugin(Kernel &K) {
K.getGraphicsServer().addGraphicsDriver(
auto_ptr<GraphicsServer::GraphicsDriver>(new OpenGLGraphicsDriver())
);
}
And here's what the exports look like with Dumpbin /exports:
Dump of file opengl_plugin.dll
File Type: DLL
Section contains the following exports for opengl_plugin.dll
00000000 characteristics
49866068 time date stamp Sun Feb 01 19:54:32 2009
0.00 version
1 ordinal base
2 number of functions
2 number of names
ordinal hint RVA name
1 0 0001110E getEngineVersion = @ILT+265(_getEngineVersion)
2 1 00011028 registerPlugin = @ILT+35(_registerPlugin)
So this code works fine:
m_hDLL = ::LoadLibrary(T"opengl_plugin.dll");
m_pfnGetEngineVersion = reinterpret_cast<fnGetEngineVersion *>(
::GetProcAddress(m_hDLL, "getEngineVersion")
);
m_pfnRegisterPlugin = reinterpret_cast<fnRegisterPlugin *>(
::GetProcAddress(m_hDLL, "registerPlugin")
);
I found I was getting the same error because I had forgot to create referential constraint after creating an association between two entities.
From the api on GridLayout:
The container is divided into equal-sized rectangles, and one component is placed in each rectangle.
Try using FlowLayout or GridBagLayout for your set size to be meaningful. Also, @Serplat is correct. You need to use setPreferredSize( Dimension ) instead of setSize( int, int ).
JPanel displayPanel = new JPanel();
// JPanel displayPanel = new JPanel( new GridLayout( 4, 2 ) );
// JPanel displayPanel = new JPanel( new BorderLayout() );
// JPanel displayPanel = new JPanel( new GridBagLayout() );
JTextField titleText = new JTextField( "title" );
titleText.setPreferredSize( new Dimension( 200, 24 ) );
// For FlowLayout and GridLayout, uncomment:
displayPanel.add( titleText );
// For BorderLayout, uncomment:
// displayPanel.add( titleText, BorderLayout.NORTH );
// For GridBagLayout, uncomment:
// displayPanel.add( titleText, new GridBagConstraints( 0, 0, 1, 1, 1.0,
// 1.0, GridBagConstraints.CENTER, GridBagConstraints.NONE,
// new Insets( 0, 0, 0, 0 ), 0, 0 ) );
Here is how you can print without using native function.
function pretty(ob, lvl = 0) {
let temp = [];
if(typeof ob === "object"){
for(let x in ob) {
if(ob.hasOwnProperty(x)) {
temp.push( getTabs(lvl+1) + x + ":" + pretty(ob[x], lvl+1) );
}
}
return "{\n"+ temp.join(",\n") +"\n" + getTabs(lvl) + "}";
}
else {
return ob;
}
}
function getTabs(n) {
let c = 0, res = "";
while(c++ < n)
res+="\t";
return res;
}
let obj = {a: {b: 2}, x: {y: 3}};
console.log(pretty(obj));
/*
{
a: {
b: 2
},
x: {
y: 3
}
}
*/
This should work, I just tested it out and it worked as expected: no expansion, substitution, or what-have-you took place.
cat <<< '
#!/bin/bash
curr=`cat /sys/class/backlight/intel_backlight/actual_brightness`
if [ $curr -lt 4477 ]; then
curr=$((curr+406));
echo $curr > /sys/class/backlight/intel_backlight/brightness;
fi' > file # use overwrite mode so that you don't keep on appending the same script to that file over and over again, unless that's what you want.
Using the following also works.
cat <<< ' > file
... code ...'
Also, it's worth noting that when using heredocs, such as << EOF
, substitution and variable expansion and the like takes place. So doing something like this:
cat << EOF > file
cd "$HOME"
echo "$PWD" # echo the current path
EOF
will always result in the expansion of the variables $HOME
and $PWD
. So if your home directory is /home/foobar
and the current path is /home/foobar/bin
, file
will look like this:
cd "/home/foobar"
echo "/home/foobar/bin"
instead of the expected:
cd "$HOME"
echo "$PWD"
If you are using dj-database-url check the schema in your DATABASES
https://github.com/kennethreitz/dj-database-url
MySQL is
'default': dj_database_url.config(default='mysql://USER:PASSWORD@localhost:PORT/NAME')
It solves the same error even without the PORT
You set the password with:
mysql -u user -p
The best way is to store native JavaScript Date objects, which map onto BSON native Date objects.
> db.test.insert({date: ISODate()})
> db.test.insert({date: new Date()})
> db.test.find()
{ "_id" : ObjectId("..."), "date" : ISODate("2014-02-10T10:50:42.389Z") }
{ "_id" : ObjectId("..."), "date" : ISODate("2014-02-10T10:50:57.240Z") }
The native type supports a whole range of useful methods out of the box, which you can use in your map-reduce jobs, for example.
If you need to, you can easily convert Date
objects to and from Unix timestamps1), using the getTime()
method and Date(milliseconds)
constructor, respectively.
1) Strictly speaking, the Unix timestamp is measured in seconds. The JavaScript Date object measures in milliseconds since the Unix epoch.