onCreate(Bundle savedInstanceState) gets called and savedInstanceState will be non-null if your Activity and it was terminated in a scenario(visual view) described above. Your app can then grab (catch) the data from savedInstanceState and regenerate your Activity
I had this problem with bundles having incorrect path's to images and CssRewriteUrlTransform
not resolving relative parent paths ..
correctly (there was also problem with external resources like webfonts). That's why I wrote this custom transform (appears to do all of the above correctly):
public class CssRewriteUrlTransform2 : IItemTransform
{
public string Process(string includedVirtualPath, string input)
{
var pathParts = includedVirtualPath.Replace("~/", "/").Split('/');
pathParts = pathParts.Take(pathParts.Count() - 1).ToArray();
return Regex.Replace
(
input,
@"(url\(['""]?)((?:\/??\.\.)*)(.*?)(['""]?\))",
m =>
{
// Somehow assigning this to a variable is faster than directly returning the output
var output =
(
// Check if it's an aboslute url or base64
m.Groups[3].Value.IndexOf(':') == -1 ?
(
m.Groups[1].Value +
(
(
(
m.Groups[2].Value.Length > 0 ||
!m.Groups[3].Value.StartsWith('/')
)
) ?
string.Join("/", pathParts.Take(pathParts.Count() - m.Groups[2].Value.Count(".."))) :
""
) +
(!m.Groups[3].Value.StartsWith('/') ? "/" + m.Groups[3].Value : m.Groups[3].Value) +
m.Groups[4].Value
) :
m.Groups[0].Value
);
return output;
}
);
}
}
Edit: I didn't realize it, but I used some custom extension methods in the code. The source code of those is:
/// <summary>
/// Based on: http://stackoverflow.com/a/11773674
/// </summary>
public static int Count(this string source, string substring)
{
int count = 0, n = 0;
while ((n = source.IndexOf(substring, n, StringComparison.InvariantCulture)) != -1)
{
n += substring.Length;
++count;
}
return count;
}
public static bool StartsWith(this string source, char value)
{
if (source.Length == 0)
{
return false;
}
return source[0] == value;
}
Of course it should be possible to replace String.StartsWith(char)
with String.StartsWith(string)
.
I came across this question when I was looking for a way to pass a Date object. In my case, as was suggested among the answers, I used Bundle.putSerializable() but that wouldn't work for a complex thing as the described DataManager in the original post.
My suggestion that will give a very similar result to putting said DataManager in the Application or make it a Singleton is to use Dependency Injection and bind the DataManager to a Singleton scope and inject the DataManager wherever it is needed. Not only do you get the benefit of increased testability but you'll also get cleaner code without all of the boiler plate "passing dependencies around between classes and activities" code. (Robo)Guice is very easy to work with and the new Dagger framework looks promising as well.
you need implements Parcelable in your ContactBean
class, I put one example for you:
public class ContactClass implements Parcelable {
private String id;
private String photo;
private String firstname;
private String lastname;
public ContactClass()
{
}
private ContactClass(Parcel in) {
firstname = in.readString();
lastname = in.readString();
photo = in.readString();
id = in.readString();
}
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(firstname);
dest.writeString(lastname);
dest.writeString(photo);
dest.writeString(id);
}
public static final Parcelable.Creator<ContactClass> CREATOR = new Parcelable.Creator<ContactClass>() {
public ContactClass createFromParcel(Parcel in) {
return new ContactClass(in);
}
public ContactClass[] newArray(int size) {
return new ContactClass[size];
}
};
// all get , set method
}
and this get and set for your code:
Intent intent = new Intent(this,DisplayContact.class);
intent.putExtra("Contact_list", ContactLis);
startActivity(intent);
second class:
ArrayList<ContactClass> myList = getIntent().getParcelableExtra("Contact_list");
I combined a few answers given by others in this question to come up with another alternative solution.
Goal: To always bundle the files, to disable the JS and CSS minification in the event that <compilation debug="true" ... />
and to always apply a custom transformation to the CSS bundle.
My solution:
1) In web.config:
<compilation debug="true" ... />
2) In the Global.asax Application_Start() method:
protected void Application_Start() {
...
BundleTable.EnableOptimizations = true; // Force bundling to occur
// If the compilation node in web.config indicates debugging mode is enabled
// then clear all transforms. I.e. disable Js and CSS minification.
if (HttpContext.Current.IsDebuggingEnabled) {
BundleTable.Bundles.ToList().ForEach(b => b.Transforms.Clear());
}
// Add a custom CSS bundle transformer. In my case the transformer replaces a
// token in the CSS file with an AppConfig value representing the website URL
// in the current environment. E.g. www.mydevwebsite in Dev and
// www.myprodwebsite.com in Production.
BundleTable.Bundles.ToList()
.FindAll(x => x.GetType() == typeof(StyleBundle))
.ForEach(b => b.Transforms.Add(new MyStyleBundleTransformer()));
...
}
You can pass values from one activity to another activity using the Bundle. In your current activity, create a bundle and set the bundle for the particular value and pass that bundle to the intent.
Intent intent = new Intent(this,NewActivity.class);
Bundle bundle = new Bundle();
bundle.putString(key,value);
intent.putExtras(bundle);
startActivity(intent);
Now in your NewActivity, you can get this bundle and retrive your value.
Bundle bundle = getArguments();
String value = bundle.getString(key);
You can also pass data through the intent. In your current activity, set intent like this,
Intent intent = new Intent(this,NewActivity.class);
intent.putExtra(key,value);
startActivity(intent);
Now in your NewActivity, you can get that value from intent like this,
String value = getIntent().getExtras().getString(key);
Pass data between activities by using Bundle
and Intent
objects.
Your first create a Bundle
object
Bundle b = new Bundle();
Then, associate the string data stored in anystring
with bundle key "myname"
b.putString("myname", anystring);
Now, create an Intent
object
Intent in = new Intent(getApplicationContext(), secondActivity.class);
Pass bundle object b
to the intent
in.putExtras(b);
and start second activity
startActivity(in);
In the second activity, we have to access the data passed from the first activity
Intent in = getIntent();
Now, you need to get the data from the bundle
Bundle b = in.getExtras();
Finally, get the value of the string data associated with key named "myname"
String s = b.getString("myname");
I had to rescale the bitmap a bit to not exceed the 1mb limit of the transaction binder. You can adapt the 400 the your screen or make it dinamic it's just meant to be an example. It works fine and the quality is nice. Its also a lot faster then saving the image and loading it after but you have the size limitation.
public void loadNextActivity(){
Intent confirmBMP = new Intent(this,ConfirmBMPActivity.class);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap bmp = returnScaledBMP();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, stream);
confirmBMP.putExtra("Bitmap",bmp);
startActivity(confirmBMP);
finish();
}
public Bitmap returnScaledBMP(){
Bitmap bmp=null;
bmp = tempBitmap;
bmp = createScaledBitmapKeepingAspectRatio(bmp,400);
return bmp;
}
After you recover the bmp in your nextActivity with the following code:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_confirmBMP);
Intent intent = getIntent();
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("Bitmap");
}
I hope my answer was somehow helpfull. Greetings
Their are two methods you can use to pass an integer. One is as shown below.
A.class
Intent myIntent = new Intent(A.this, B.class);
myIntent.putExtra("intVariableName", intValue);
startActivity(myIntent);
B.class
Intent intent = getIntent();
int intValue = intent.getIntExtra("intVariableName", 0);
The other method converts the integer to a string and uses the following code.
A.class
Intent intent = new Intent(A.this, B.class);
Bundle extras = new Bundle();
extras.putString("StringVariableName", intValue + "");
intent.putExtras(extras);
startActivity(intent);
The code above will pass your integer value as a string to class B. On class B, get the string value and convert again as an integer as shown below.
B.class
Bundle extras = getIntent().getExtras();
String stringVariableName = extras.getString("StringVariableName");
int intVariableName = Integer.parseInt(stringVariableName);
This could happen when you have several projects that include each other in JAR form. What I did was remove all libraries and project dependencies on buildpath, for all projects. Then, one at a time, I added the project dependencies on the Project Tab, but only the ones needed. This is because you can add a project which in turn has itself referenced or another project which is referencing some other project with this self-referencing issue.
This resolved my issue.
This code sends array of integer values
Initialize array List
List<Integer> test = new ArrayList<Integer>();
Add values to array List
test.add(1);
test.add(2);
test.add(3);
Intent intent=new Intent(this, targetActivty.class);
Send the array list values to target activity
intent.putIntegerArrayListExtra("test", (ArrayList<Integer>) test);
startActivity(intent);
here you get values on targetActivty
Intent intent=getIntent();
ArrayList<String> test = intent.getStringArrayListExtra("test");
Maybe a bit late, but: instead of this:
public void onNewIntent(Intent intent){
Bundle extras = intent.getExtras();
Log.i( "dbg","onNewIntent");
if(extras != null){
Log.i( "dbg", "Extra6 bool: "+ extras.containsKey("net.dbg.android.fjol"));
Log.i( "dbg", "Extra6 val : "+ extras.getString("net.dbg.android.fjol"));
}
mTabsController.setActiveTab(TabsController.TAB_DOWNLOADS);
}
Use this:
Bundle extras = getIntent().getExtras();
if(extras !=null) {
String value = extras.getString("keyName");
}
This fixed it:
rm Gemfile.lock
bundle install
againEDIT: DON'T DO IT IN PRODUCTION!
For production go to this answer: https://stackoverflow.com/posts/54083113/revisions
I had this problem on Ubuntu 18.04. I updated the gem
sudo gem install rails
sudo gem install jekyll
sudo gem install jekyll bundler
cd ~/desiredFolder
jekyll new <foldername>
cd <foldername> OR
bundle init
bundle install
bundle add jekyll
bundle exec jekyll serve
All worked and goto your browser just go to http://127.0.0.1:4000/ and it really should be running
The Android Developer pages still state how you can download and use the ADT plugin for Eclipse:
https://dl-ssl.google.com/android/eclipse/
Links for the Eclipse ADT Bundle (found using Archive.org's WayBackMachine) I don't know how future-proof these links are. They all worked on February 27th, 2017.
Update (2015-06-29): Google will end development and official support for ADT in Eclipse at the end of this year and recommends switching to Android Studio.
For example :
In MainActivity :
Intent intent = new Intent(this, OtherActivity.class);
intent.putExtra(OtherActivity.KEY_EXTRA, yourDataObject);
startActivity(intent);
In OtherActivity :
public static final String KEY_EXTRA = "com.example.yourapp.KEY_BOOK";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String yourDataObject = null;
if (getIntent().hasExtra(KEY_EXTRA)) {
yourDataObject = getIntent().getStringExtra(KEY_EXTRA);
} else {
throw new IllegalArgumentException("Activity cannot find extras " + KEY_EXTRA);
}
// do stuff
}
More informations here : http://developer.android.com/reference/android/content/Intent.html
Offering a quick answer for people using Ionic. I need to show a tooltip only once so I used the $localStorage to achieve this. This is for playing a track, so when they push play, it shows the tooltip once.
$scope.storage = $localStorage; //connects an object to $localstorage
$scope.storage.hasSeenPopup = "false"; // they haven't seen it
$scope.showPopup = function() { // popup to tell people to turn sound on
$scope.data = {}
// An elaborate, custom popup
var myPopup = $ionicPopup.show({
template: '<p class="popuptext">Turn Sound On!</p>',
cssClass: 'popup'
});
$timeout(function() {
myPopup.close(); //close the popup after 3 seconds for some reason
}, 2000);
$scope.storage.hasSeenPopup = "true"; // they've now seen it
};
$scope.playStream = function(show) {
PlayerService.play(show);
$scope.audioObject = audioObject; // this allow for styling the play/pause icons
if ($scope.storage.hasSeenPopup === "false"){ //only show if they haven't seen it.
$scope.showPopup();
}
}
Sounds to me like you don't have your web.config authorization section set up properly within . See below for an example.
<authentication mode="Forms">
<forms name="MyCookie" loginUrl="Login.aspx" protection="All" timeout="90" slidingExpiration="true"></forms>
</authentication>
<authorization>
<deny users="?" />
</authorization>
SELECT chargeId, chargeType, MAX(serviceMonth) AS serviceMonth
FROM invoice
GROUP BY chargeId, chargeType
Logical Vs Physical Address space
An address generated by the CPU is commonly refereed as Logical Address,whereas the address seen by the memory unit,that is one loaded into the memory address register of the memory is commonly refereed as the Physical Address.The compile time and load time address binding generates the identical logical and physical addresses.However, the execution time address binding scheme results in differing logical and physical addresses.
The set of all logical addresses generated by a program is known as Logical Address Space,whereas the set of all physical addresses corresponding to these logical addresses is Physical Address Space.Now, the run time mapping from virtual address to physical address is done by a hardware device known as Memory Management Unit.Here in the case of mapping the base register is known as relocation register.The value in the relocation register is added to the address generated by a user process at the time it is sent to memory.Let's understand this situation with the help of example:If the base register contains the value 1000,then an attempt by the user to address location 0 is dynamically relocated to location 1000,an access to location 346 is mapped to location 1346.
The user program never sees the real physical address space,it always deals with the Logical addresses.As we have two different type of addresses Logical address in the range (0 to max) and Physical addresses in the range(R to R+max) where R is the value of relocation register.The user generates only logical addresses and thinks that the process runs in location to 0 to max.As it is clear from the above text that user program supplies only logical addresses,these logical addresses must be mapped to physical address before they are used.
One options will be to show the selected option above (or below) the select list like following:
HTML
<div id="selText"><span> </span></div><br/>
<select size="4" id="mySelect" style="width:65px;color:#f98ad3;">
<option value="1" selected>option 1 The Long Option</option>
<option value="2">option 2</option>
<option value="3">option 3</option>
<option value="4">option 4</option>
<option value="5">option 5 Another Longer than the Long Option ;)</option>
<option value="6">option 6</option>
</select>
JavaScript
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"
type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
$("select#mySelect").change(function(){
//$("#selText").html($($(this).children("option:selected")[0]).text());
var txt = $($(this).children("option:selected")[0]).text();
$("<span>" + txt + "<br/></span>").appendTo($("#selText span:last"));
});
});
</script>
PS:- Set height of div#selText otherwise it will keep shifting select list downward.
What worked for me was going to the article someone else had already mentioned, but keying on this piece:
application.config.backup is not created by automatic backup. The backup files are in %systemdrive%\inetpub\history directory. Automatic backup is also a Vista SP1 and above feature. More information can be found in this blog post, http://blogs.iis.net/bills/archive/2008/03/24/how-to-backup-restore-iis7-configuration.aspx
I was able to find backups of my settings from when I had first installed IIS, and just copy and replace the files in the inetsrv\config directory.
This worked
<video class="video-box" poster="/" controls>
<source src="some source" type="video/mp4">
</video>
And the CSS
.video-box{
background-image: 'some image';
background-size: cover;
}
This code works for me, also you should consider if you have any other button or labels in that window and you not use .place()
it will not work properly.
from Tkinter import*
from PIL import Image, ImageTk
img = Image.open("path/x.png")
photo=ImageTk.PhotoImage(img)
lab=Label(image=photo).place(x=50,y=50)
Dougs answer is correct, but you actually can use $.getJSON
and catch errors (not having to use $.ajax
). Just chain the getJSON
call with a call to the fail
function:
$.getJSON('/foo/bar.json')
.done(function() { alert('request successful'); })
.fail(function() { alert('request failed'); });
Live demo: http://jsfiddle.net/NLDYf/5/
This behavior is part of the jQuery.Deferred interface.
Basically it allows you to attach events to an asynchronous action after you call that action, which means you don't have to pass the event function to the action.
Read more about jQuery.Deferred here: http://api.jquery.com/category/deferred-object/
I had the same problem, then I did this two steps:
UPDATE : check Peter's answer below for a builtin solution :
This is a helper to set a persistent cookie:
import datetime
def set_cookie(response, key, value, days_expire=7):
if days_expire is None:
max_age = 365 * 24 * 60 * 60 # one year
else:
max_age = days_expire * 24 * 60 * 60
expires = datetime.datetime.strftime(
datetime.datetime.utcnow() + datetime.timedelta(seconds=max_age),
"%a, %d-%b-%Y %H:%M:%S GMT",
)
response.set_cookie(
key,
value,
max_age=max_age,
expires=expires,
domain=settings.SESSION_COOKIE_DOMAIN,
secure=settings.SESSION_COOKIE_SECURE or None,
)
Use the following code before sending a response.
def view(request):
response = HttpResponse("hello")
set_cookie(response, 'name', 'jujule')
return response
UPDATE : check Peter's answer below for a builtin solution :
Two ways:
1.
for row in session.execute(session.query(User).statement):
print(dict(row))
2.
selected_columns = User.__table__.columns
rows = session.query(User).with_entities(*selected_columns).all()
for row in rows :
print(row._asdict())
You need to set figure
properties.
At the very beginning of the script, call
figure('name','something else')
Calling figure
is a good thing, anyway, because without it, you always plot into the same window, and sometimes you may want to compare two windows side-by-side.
Alternatively, you can store the figure's handle by calling
figH = figure;
so that you can later change the figure properties to your liking (the 'numberTitle'
property setting eliminates the "figure X" text)
set(figH,'Name','something else','NumberTitle','off')
Have a look at the figure properties in the MATLAB documentation to see what else you can change if you want.
The API's will provide full access to LIVE data, and developers can thus provide applications and develop against the API without paying licencing fees. Consumers will pay for any data received from the apps provided by third party developers, and so BB will grow their audience and revenue in that way.
NOTE: Bloomberg is offering this programming interface (BLPAPI) under a free-use license. This license does not include nor provide access to any Bloomberg data or content.
OS independence is critical for me, so mkdir -p
is not an option. I created this series of functions that use eval
to create directory targets with the prerequisite on the parent directory. This has the benefit that make -j 2
will work without issue since the dependencies are correctly determined.
# convenience function for getting parent directory, will eventually return ./
# $(call get_parent_dir,somewhere/on/earth/) -> somewhere/on/
get_parent_dir=$(dir $(patsubst %/,%,$1))
# function to create directory targets.
# All directories have order-only-prerequisites on their parent directories
# https://www.gnu.org/software/make/manual/html_node/Prerequisite-Types.html#Prerequisite-Types
TARGET_DIRS:=
define make_dirs_recursively
TARGET_DIRS+=$1
$1: | $(if $(subst ./,,$(call get_parent_dir,$1)),$(call get_parent_dir,$1))
mkdir $1
endef
# function to recursively get all directories
# $(call get_all_dirs,things/and/places/) -> things/ things/and/ things/and/places/
# $(call get_all_dirs,things/and/places) -> things/ things/and/
get_all_dirs=$(if $(subst ./,,$(dir $1)),$(call get_all_dirs,$(call get_parent_dir,$1)) $1)
# function to turn all targets into directories
# $(call get_all_target_dirs,obj/a.o obj/three/b.o) -> obj/ obj/three/
get_all_target_dirs=$(sort $(foreach target,$1,$(call get_all_dirs,$(dir $(target)))))
# create target dirs
create_dirs=$(foreach dirname,$(call get_all_target_dirs,$1),$(eval $(call make_dirs_recursively,$(dirname))))
TARGETS := w/h/a/t/e/v/e/r/things.dat w/h/a/t/things.dat
all: $(TARGETS)
# this must be placed after your .DEFAULT_GOAL, or you can manually state what it is
# https://www.gnu.org/software/make/manual/html_node/Special-Variables.html
$(call create_dirs,$(TARGETS))
# $(TARGET_DIRS) needs to be an order-only-prerequisite
w/h/a/t/e/v/e/r/things.dat: w/h/a/t/things.dat | $(TARGET_DIRS)
echo whatever happens > $@
w/h/a/t/things.dat: | $(TARGET_DIRS)
echo whatever happens > $@
For example, running the above will create:
$ make
mkdir w/
mkdir w/h/
mkdir w/h/a/
mkdir w/h/a/t/
mkdir w/h/a/t/e/
mkdir w/h/a/t/e/v/
mkdir w/h/a/t/e/v/e/
mkdir w/h/a/t/e/v/e/r/
echo whatever happens > w/h/a/t/things.dat
echo whatever happens > w/h/a/t/e/v/e/r/things.dat
Depending on what you want the file to contain:
touch /path/to/file
for an empty filesomecommand > /path/to/file
for a file containing the output of some command.
eg: grep --help > randomtext.txt
echo "This is some text" > randomtext.txt
nano /path/to/file
or vi /path/to/file
(or any other editor emacs,gedit etc
)
It either opens the existing one for editing or creates & opens the empty file to enter, if it doesn't exist
Create the file using cat
$ cat > myfile.txt
Now, just type whatever you want in the file:
Hello World!
CTRL-D to save and exit
There are several possible solutions:
touch file
>file
echo -n > file
printf '' > file
The echo
version will work only if your version of echo
supports the -n
switch to suppress newlines. This is a non-standard addition. The other examples will all work in a POSIX shell.
echo '' > file
printf '\n' > file
This is a valid "text file" because it ends in a newline.
"$EDITOR" file
echo 'text' > file
cat > file <<END \
text
END
printf 'text\n' > file
These are equivalent. The $EDITOR
command assumes that you have an interactive text editor defined in the EDITOR environment variable and that you interactively enter equivalent text. The cat
version presumes a literal newline after the \
and after each other line. Other than that these will all work in a POSIX shell.
Of course there are many other methods of writing and creating files, too.
Essentially this will do the job: .replace(/\r\n/g,'\n').split('\n')
.
This works on Mac, Linux & Windows.
Code Snippets
Synchronous:
const { readFileSync } = require('fs');
const array = readFileSync('file.txt').toString().replace(/\r\n/g,'\n').split('\n');
for(let i of array) {
console.log(i);
}
Asynchronous:
With the fs.promises API that provides an alternative set of asynchronous file system methods that return Promise objects rather than using callbacks. (No need to promisify, you can use async-await with this too, available on and after Node.js version 10.0.0)
const { readFile } = require('fs').promises;
readFile('file.txt', function(err, data) {
if(err) throw err;
const arr = data.toString().replace(/\r\n/g,'\n').split('\n');
for(let i of arr) {
console.log(i);
}
});
More about \r & \n here: \r\n, \r and \n what is the difference between them?
You can use names
directly in the read_csv
names : array-like, default None List of column names to use. If file contains no header row, then you should explicitly pass header=None
Cov = pd.read_csv("path/to/file.txt",
sep='\t',
names=["Sequence", "Start", "End", "Coverage"])
Remember:
"Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered. We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%".
(Thanks to metamorphosis for the full quote)
Don't use a C array instead of a vector (or whatever) just because you believe it's faster as it is supposed to be lower-level. You would be wrong.
Use by default vector (or the safe container adapted to your need), and then if your profiler says it is a problem, see if you can optimize it, either by using a better algorithm, or changing container.
This said, we can go back to the original question.
The C++ array classes are better behaved than the low-level C array because they know a lot about themselves, and can answer questions C arrays can't. They are able to clean after themselves. And more importantly, they are usually written using templates and/or inlining, which means that what appears to a lot of code in debug resolves to little or no code produced in release build, meaning no difference with their built-in less safe competition.
All in all, it falls on two categories:
Using a pointer to a malloc-ed/new-ed array will be at best as fast as the std::vector version, and a lot less safe (see litb's post).
So use a std::vector.
Using a static array will be at best:
So use a std::array.
Sometimes, using a vector
instead of a raw buffer incurs a visible cost because the vector
will initialize the buffer at construction, while the code it replaces didn't, as remarked bernie by in his answer.
If this is the case, then you can handle it by using a unique_ptr
instead of a vector
or, if the case is not exceptional in your codeline, actually write a class buffer_owner
that will own that memory, and give you easy and safe access to it, including bonuses like resizing it (using realloc
?), or whatever you need.
This is if you are building a package and you are finding error in imports. I learnt it the hard way.The answer isn't to add the package to python path or to do it programatically (what if your module gets installed and your command adds it again?) thats a bad way.
The right thing to do is: 1) Use virtualenv pyvenv-3.4 or something similar 2) Activate the development mode - $python setup.py develop
I had the same issue, but it was when the set was null. Only in the Set collection, in List work fine. You can try to the hibernate annotation @LazyCollection(LazyCollectionOption.FALSE)
instead of JPA annotation fetch = FetchType.EAGER.
My solution: This is my configuration and work fine
@OneToMany(mappedBy = "format", cascade = CascadeType.ALL, orphanRemoval = true)
@LazyCollection(LazyCollectionOption.FALSE)
private Set<Barcode> barcodes;
@OneToMany(mappedBy = "format", cascade = CascadeType.ALL, orphanRemoval = true)
@LazyCollection(LazyCollectionOption.FALSE)
private List<FormatAdditional> additionals;
If you don't want to use any libraries and you have reoccurrences in your data, you can use which
with sapply
as well.
new_order <- sapply(target, function(x,df){which(df$name == x)}, df=df)
df <- df[new_order,]
I use a percentage method to achieve
border: 3px solid rgb(1, 1, 1);
border-top-left-radius: 100% 200%;
border-top-right-radius: 100% 200%;
You will get the structure by typing the command:
.schema <tableName>
SELECT SUBSTRING(ParentBGBU,0,CHARINDEX('-',ParentBGBU,0)) FROM dbo.tblHCMMaster;
I also had the same issue. I changed it to the following and it worked.
Java :
@RequestMapping(value = "/test", method = RequestMethod.GET)
HTML code:
<form action="<%=request.getContextPath() %>/test" method="GET">
<input type="submit" value="submit">
</form>
By default if you do not specify http method in a form it uses GET. To use POST method you need specifically state it.
Hope this helps.
Long solved I'm sure but this might help some other poor soul.
This error can ocurre if the DLL you are deploying in the install package is not the same as the DLL you are referencing (these will have different IDs)
Sounds obvious but can easily happen if you make a small change to the dll and have previously installed the app on your own machine which reregisters the dll.
The --no-ff
option is useful when you want to have a clear notion of your feature branch. So even if in the meantime no commits were made, FF is possible - you still want sometimes to have each commit in the mainline correspond to one feature. So you treat a feature branch with a bunch of commits as a single unit, and merge them as a single unit. It is clear from your history when you do feature branch merging with --no-ff
.
If you do not care about such thing - you could probably get away with FF whenever it is possible. Thus you will have more svn-like feeling of workflow.
For example, the author of this article thinks that --no-ff
option should be default and his reasoning is close to that I outlined above:
Consider the situation where a series of minor commits on the "feature" branch collectively make up one new feature: If you just do "git merge feature_branch" without --no-ff
, "it is impossible to see from the Git history which of the commit objects together have implemented a feature—you would have to manually read all the log messages. Reverting a whole feature (i.e. a group of commits), is a true headache [if --no-ff
is not used], whereas it is easily done if the --no-ff
flag was used [because it's just one commit]."
SQL Server does not have a TRIM function, but rather it has two. One each for specifically trimming spaces from the "front" of a string (LTRIM) and one for trimming spaces from the "end" of a string (RTRIM).
Something like the following will update every record in your table, trimming all extraneous space (either at the front or the end) of a varchar/nvarchar field:
UPDATE
[YourTableName]
SET
[YourFieldName] = LTRIM(RTRIM([YourFieldName]))
(Strangely, SSIS (Sql Server Integration Services) does have a single TRIM function!)
Perhaps another way to code conditional constructs in XML:
<rule>
<if>
<conditions>
<condition var="something" operator=">">400</condition>
<!-- more conditions possible -->
</conditions>
<statements>
<!-- do something -->
</statements>
</if>
<elseif>
<conditions></conditions>
<statements></statements>
</elseif>
<else>
<statements></statements>
</else>
</rule>
You can try using dictionary as:-
NSDictionary *infoDictionary = [[NSBundle mainBundle]infoDictionary];
NSString *buildVersion = infoDictionary[(NSString*)kCFBundleVersionKey];
NSString *bundleName = infoDictionary[(NSString *)kCFBundleNameKey]
I feel the simplest way would be
from matplotlib import pyplot;
from pylab import genfromtxt;
mat0 = genfromtxt("data0.txt");
mat1 = genfromtxt("data1.txt");
pyplot.plot(mat0[:,0], mat0[:,1], label = "data0");
pyplot.plot(mat1[:,0], mat1[:,1], label = "data1");
pyplot.legend();
pyplot.show();
Use somethings like this :
public static class PropertyExtension{
public static void SetPropertyValue(this object p_object, string p_propertyName, object value)
{
PropertyInfo property = p_object.GetType().GetProperty(p_propertyName);
property.SetValue(p_object, Convert.ChangeType(value, property.PropertyType), null);
}
}
or
public static class PropertyExtension{
public static void SetPropertyValue(this object p_object, string p_propertyName, object value)
{
PropertyInfo property = p_object.GetType().GetProperty(p_propertyName);
Type t = Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType;
object safeValue = (value == null) ? null : Convert.ChangeType(value, t);
property.SetValue(p_object, safeValue, null);
}
}
Yes, you are synchronizing correctly. I will explain this in more detail. You must synchronize two or more method calls on the synchronizedMap object only in a case you have to rely on results of previous method call(s) in the subsequent method call in the sequence of method calls on the synchronizedMap object. Let’s take a look at this code:
synchronized (synchronizedMap) {
if (synchronizedMap.containsKey(key)) {
synchronizedMap.get(key).add(value);
}
else {
List<String> valuesList = new ArrayList<String>();
valuesList.add(value);
synchronizedMap.put(key, valuesList);
}
}
In this code
synchronizedMap.get(key).add(value);
and
synchronizedMap.put(key, valuesList);
method calls are relied on the result of the previous
synchronizedMap.containsKey(key)
method call.
If the sequence of method calls were not synchronized the result might be wrong.
For example thread 1
is executing the method addToMap()
and thread 2
is executing the method doWork()
The sequence of method calls on the synchronizedMap
object might be as follows:
Thread 1
has executed the method
synchronizedMap.containsKey(key)
and the result is "true
".
After that operating system has switched execution control to thread 2
and it has executed
synchronizedMap.remove(key)
After that execution control has been switched back to the thread 1
and it has executed for example
synchronizedMap.get(key).add(value);
believing the synchronizedMap
object contains the key
and NullPointerException
will be thrown because synchronizedMap.get(key)
will return null
.
If the sequence of method calls on the synchronizedMap
object is not dependent on the results of each other then you don't need to synchronize the sequence.
For example you don't need to synchronize this sequence:
synchronizedMap.put(key1, valuesList1);
synchronizedMap.put(key2, valuesList2);
Here
synchronizedMap.put(key2, valuesList2);
method call does not rely on the results of the previous
synchronizedMap.put(key1, valuesList1);
method call (it does not care if some thread has interfered in between the two method calls and for example has removed the key1
).
There is the option to use OleDB
and use the Excel sheets like datatables in a database...
Just an example.....
string con =
@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\temp\test.xls;" +
@"Extended Properties='Excel 8.0;HDR=Yes;'";
using(OleDbConnection connection = new OleDbConnection(con))
{
connection.Open();
OleDbCommand command = new OleDbCommand("select * from [Sheet1$]", connection);
using(OleDbDataReader dr = command.ExecuteReader())
{
while(dr.Read())
{
var row1Col0 = dr[0];
Console.WriteLine(row1Col0);
}
}
}
This example use the Microsoft.Jet.OleDb.4.0
provider to open and read the Excel file. However, if the file is of type xlsx (from Excel 2007 and later), then you need to download the Microsoft Access Database Engine components and install it on the target machine.
The provider is called Microsoft.ACE.OLEDB.12.0;
. Pay attention to the fact that there are two versions of this component, one for 32bit and one for 64bit. Choose the appropriate one for the bitness of your application and what Office version is installed (if any). There are a lot of quirks to have that driver correctly working for your application. See this question for example.
Of course you don't need Office installed on the target machine.
While this approach has some merits, I think you should pay particular attention to the link signaled by a comment in your question Reading excel files from C#. There are some problems regarding the correct interpretation of the data types and when the length of data, present in a single excel cell, is longer than 255 characters
It's used for converting arbitrary binary data to ASCII text.
For example, e-mail attachments are sent this way.
I was having same error using DownloadString; and was able to make it works as below with suggestions on this page
System.Net.WebClient client = new System.Net.WebClient();
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
string sHttpResonse = client.DownloadString(sUrl);
adb shell
am start -n com.package.name/com.package.name.ActivityName
Or you can use this directly:
adb shell am start -n com.package.name/com.package.name.ActivityName
You can also specify actions to be filter by your intent-filters:
am start -a com.example.ACTION_NAME -n com.package.name/com.package.name.ActivityName
If you logged in as Normal User without DBA permission you may uses the following command to see your own schema's all tables and views.
select * from tab;
It's called and
and or
in Python.
For Windows users, enter the following command :
set JAVA_OPTS=-Dhttp.proxySet=true -Dhttp.proxyHost=[Your Proxy server] -Dhttp.proxyPort=8080
I Hope that this helps you out... Because I tried all the answers but nothing worked perfectly. So, I had to come up with a solution on my own.
#horizontal-style {
padding-inline-start: 0 !important; // Just in case if you find that there is an extra padding at the start of the line
justify-content: space-around;
display: flex;
}
#horizontal-style a {
text-align: center;
color: white;
text-decoration: none;
}
type Services
at search, then start Services
then start all VM services
In order to keep track of dependency issues, I like to use the conda installer, which simply boils down to:
conda install openpyxl
Note: for those using pandas 0.20.3 and above, and are looking for an answer, all these options will work:
df = pd.DataFrame(np.ones((5,6)),columns=['one','two','three',
'four','five','six'])
df.one *=5
df.two = df.two*5
df.three = df.three.multiply(5)
df['four'] = df['four']*5
df.loc[:, 'five'] *=5
df.iloc[:, 5] = df.iloc[:, 5]*5
which results in
one two three four five six
0 5.0 5.0 5.0 5.0 5.0 5.0
1 5.0 5.0 5.0 5.0 5.0 5.0
2 5.0 5.0 5.0 5.0 5.0 5.0
3 5.0 5.0 5.0 5.0 5.0 5.0
4 5.0 5.0 5.0 5.0 5.0 5.0
Ok, first e.preventDefault();
it's not a Jquery element, it's a method of javascript, now what it's true it's if you add this method you avoid the submit the event, now what you could do it's send the form by ajax something like this
$('#subscription_order_form').submit(function(e){
$.ajax({
url: $(this).attr('action'),
data : $(this).serialize(),
success : function (data){
}
});
e.preventDefault();
});
do this on a new thread (seperate it from main thread)
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
}
}).run();
The shortest solution for the year 2020 (for those happy people who don't need to support IE)
Tested in Chrome, Firefox, Safari.
function onBeforeUnload(e) {
if (thereAreUnsavedChanges()) {
e.preventDefault();
e.returnValue = '';
return;
}
delete e['returnValue'];
}
window.addEventListener('beforeunload', onBeforeUnload);
Actually no one modern browser (Chrome, Firefox, Safari) displays the "return value" as a question to user. Instead they show their own confirmation text (it depends on browser). But we still need to return some (even empty) string to trigger that confirmation on Chrome.
If you want formated number then use
SELECT TO_CHAR(number, 'fmt')
FROM DUAL;
SELECT TO_CHAR('123', 999.99)
FROM DUAL;
Result 123.00
When doing this programmatically, be sure to call the setters in the correct order:
imageView.setAdjustViewBounds(true)
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP)
You can either change the thread identity, or P/Invoke WNetAddConnection2. I prefer the latter, as I sometimes need to maintain multiple credentials for different locations. I wrap it into an IDisposable and call WNetCancelConnection2 to remove the creds afterwards (avoiding the multiple usernames error):
using (new NetworkConnection(@"\\server\read", readCredentials))
using (new NetworkConnection(@"\\server2\write", writeCredentials)) {
File.Copy(@"\\server\read\file", @"\\server2\write\file");
}
I think that it's better to use simply str_replace, like the manual says:
If you don't need fancy replacing rules (like regular expressions), you should always use this function instead of ereg_replace() or preg_replace().
<?
$badUrl = "http://www.site.com/backend.php?/c=crud&m=index&t=care";
$goodUrl = str_replace('?/', '?', $badUrl);
One approach is to combine the search strings into a regex pattern as in this answer.
Piggybacking on what the other answers say, since you don't know how to do them at all, here's an example of how you might do it in JavaScript:
var charactersOnly = "This contains only characters";
var nonCharacters = "This has _@#*($()*@#$(*@%^_(#@!$ non-characters";
if (charactersOnly.search(/[^a-zA-Z]+/) === -1) {
alert("Only characters");
}
if (nonCharacters.search(/[^a-zA-Z]+/)) {
alert("There are non characters.");
}
The /
starting and ending the regular expression signify that it's a regular expression. The search
function takes both strings and regexes, so the /
are necessary to specify a regex.
From the MDN Docs, the function returns -1
if there is no match.
Also note: that this works for only a-z, A-Z. If there are spaces, it will fail.
Simple way if new table does not exist and you want to make a copy of old table with everything then following works in SQL Server.
SELECT * INTO NewTable FROM OldTable
You can access the current url quite easily in JavaScript with window.location
You have access to the segments of that URL via this locations
object. For example:
// This article:
// https://stackoverflow.com/questions/21246818/how-to-get-the-base-url-in-javascript
var base_url = window.location.origin;
// "http://stackoverflow.com"
var host = window.location.host;
// stackoverflow.com
var pathArray = window.location.pathname.split( '/' );
// ["", "questions", "21246818", "how-to-get-the-base-url-in-javascript"]
In Chrome Dev Tools, you can simply enter window.location
in your console and it will return all of the available properties.
Further reading is available on this Stack Overflow thread
If someone is still looking, here's what worked for me - to read an arbitrary length of string including spaces.
Thanks to many posters on the web for sharing this simple & elegant solution. If it works the credit goes to them but any errors are mine.
char *name;
scanf ("%m[^\n]s",&name);
printf ("%s\n",name);
Bootstrap 4 to hide whole content use this class '.d-none' it will be hide everything regardless of breakpoints same like previous bootstrap version class '.hidden'
I have found this way of reading strings from files to work best for me
String st, full;
full="";
BufferedReader br = new BufferedReader(new FileReader(URL));
while ((st=br.readLine())!=null) {
full+=st;
}
"full" will be the completed combination of all of the lines. If you want to add a line break between the lines of text you would do
full+=st+"\n";
This is often caused by an attempt to process a null object. An example, trying to empty a Bindable list that is null will trigger the exception:
public class MyViewModel {
[BindableProperty]
public virtual IList<Products> ProductsList{ get; set; }
public MyViewModel ()
{
ProductsList.Clear(); // here is the problem
}
}
This could easily be fixed by checking for null:
if (ProductsList!= null) ProductsList.Clear();
I Had the same problem that made because I did this in Startup.cs
class and ConfigureServices
method:
services.AddScoped<IExamle, Examle>();
But you have to write your Interface
in the first and your Class
in the second
This is a classic difficulty in LaTeX.
The problem is how to do layout with floats (figures and tables, an similar objects) and footnotes. In particular, it is hard to pick a place for a float with certainty that making room for the associated footnotes won't cause trouble. So the standard tabular
and figure
environments don't even try.
What can you do:
\footnotesize
for the size). You also have to manage the symbols or number yourself with \footnotemark
. Simple, but not very attractive, and the footnote does not appear at the bottom of the page.tabularx
, longtable
, threeparttable[x]
(kudos to Joseph) or ctable
which support this behavior.[h!]
(or [H]
with the float package) to control where the float will appear, and \footnotetext
on the same page to put the footnote where you want it. Again, use \footnotemark
to install the symbol. Fragile and requires hand-tooling every instance.footnotes
package provides the savenote
environment, which can be used to do this.\begin{figure} \begin{minipage}{\textwidth} ... \caption[Caption for LOF]% {Real caption\footnote{blah}} \end{minipage} \end{figure}
Additional reference: TeX FAQ item Footnotes in tables.
socket.disconnect()
Only reboots the connection firing disconnect event on client side. But gets connected again.
socket.close()
Disconnect the connection from client. The client will keep trying to connect.
To run in Windows, copy this *.bat file to each directory you wish to use and run the ipython notebook by executing the batch file. This assumes you have ipython installed in windows.
set "var=%cd%"
cd var
ipython notebook
@ and @@ in modules also work differently when a class extends or includes that module.
So given
module A
@a = 'module'
@@a = 'module'
def get1
@a
end
def get2
@@a
end
def set1(a)
@a = a
end
def set2(a)
@@a = a
end
def self.set1(a)
@a = a
end
def self.set2(a)
@@a = a
end
end
Then you get the outputs below shown as comments
class X
extend A
puts get1.inspect # nil
puts get2.inspect # "module"
@a = 'class'
@@a = 'class'
puts get1.inspect # "class"
puts get2.inspect # "module"
set1('set')
set2('set')
puts get1.inspect # "set"
puts get2.inspect # "set"
A.set1('sset')
A.set2('sset')
puts get1.inspect # "set"
puts get2.inspect # "sset"
end
class Y
include A
def doit
puts get1.inspect # nil
puts get2.inspect # "module"
@a = 'class'
@@a = 'class'
puts get1.inspect # "class"
puts get2.inspect # "class"
set1('set')
set2('set')
puts get1.inspect # "set"
puts get2.inspect # "set"
A.set1('sset')
A.set2('sset')
puts get1.inspect # "set"
puts get2.inspect # "sset"
end
end
Y.new.doit
So use @@ in modules for variables you want common to all their uses, and use @ in modules for variables you want separate for every use context.
For better support different locales use this way:
DecimalFormat df = new DecimalFormat();
df.setMaximumFractionDigits(2);
df.setMinimumFractionDigits(0);
df.setGroupingUsed(false);
df.format(bigDecimal);
also you can customize it:
DecimalFormat df = new DecimalFormat("###,###,###");
df.format(bigDecimal);
No, don't do it that way.
From your Eclipse workspace, right click your project on the left pane -> Properties -> Java Build Path -> Add Jars -> add your jars here.
Tadaa!! :)
I did this plunker to explore one way to do what you want.
Here I get mystyle
from the parent component but you can get it from a service.
import {Component, View} from 'angular2/angular2'
@Component({
selector: '[my-person]',
inputs: [
'name',
'mystyle: customstyle'
],
host: {
'[style.backgroundColor]': 'mystyle.backgroundColor'
}
})
@View({
template: `My Person Component: {{ name }}`
})
export class Person {}
I'd like to centralize the creation of the error response in this way:
app.get('/test', function(req, res){
throw {status: 500, message: 'detailed message'};
});
app.use(function (err, req, res, next) {
res.status(err.status || 500).json({status: err.status, message: err.message})
});
So I have always the same error output format.
PS: of course you could create an object to extend the standard error like this:
const AppError = require('./lib/app-error');
app.get('/test', function(req, res){
throw new AppError('Detail Message', 500)
});
'use strict';
module.exports = function AppError(message, httpStatus) {
Error.captureStackTrace(this, this.constructor);
this.name = this.constructor.name;
this.message = message;
this.status = httpStatus;
};
require('util').inherits(module.exports, Error);
:!mv % %:h/new_name
Register %
contains the name of the current file.'%:h'
shows the directory 'head' containing the current file, e.g.: %:h
returns /abc/def
when your file full path is abc/def/my.txt
private void replaceView(View oldV,View newV){
ViewGroup par = (ViewGroup)oldV.getParent();
if(par == null){return;}
int i1 = par.indexOfChild(oldV);
par.removeViewAt(i1);
par.addView(newV,i1);
}
This is working for me. Which version of Flask are you using?
from flask import jsonify
...
@app.route('/test/json')
def test_json():
list = [
{'a': 1, 'b': 2},
{'a': 5, 'b': 10}
]
return jsonify(results = list)
For those who have Excel 2016 (and I suppose next versions), there is now directly the CONCAT function, which will replace the CONCATENATE function.
So the correct way to do it in Excel 2016 is :
=CONCAT(A1:A4)
which will produce :
Iamaboy
For users of olders versions of Excel, the other answers are relevant.
You need to have the testng.jar
under classpath.
try C:\projectfred> java -cp "path-tojar/testng.jar:path_to_yourtest_classes" org.testng.TestNG testng.xml
Update:
Under linux I ran this command and it would be some thing similar on Windows either
test/bin# java -cp ".:../lib/*" org.testng.TestNG testng.xml
Directory structure:
/bin - All my test packages are under bin including testng.xml
/src - All source files are under src
/lib - All libraries required for the execution of tests are under this.
Once I compile all sources they go under bin directory. So, in the classpath I need to specify contents of bin directory and all the libraries like testng.xml, loggers etc over here. Also copy testng.xml to bin folder if you dont want to specify the full path where the testng.xml is available.
/bin
-- testng.xml
-- testclasses
-- Properties files if any.
/lib
-- testng.jar
-- log4j.jar
Update
:
Go to the folder MyProject
and type run the java command like the way shown below:-
java -cp ".: C:\Program Files\jbdevstudio4\studio\plugins\*" org.testng.TestNG testng.xml
I believe the testng.xml file is under C:\Users\me\workspace\MyProject
if not please give the full path for testng.xml
file
In my case I was trying to delete entries that were saved in .git/packed-refs
. You can edit this plain text file and delete entries from it that git br -D
doesn't know how to touch (At least in ver 1.7.9.5).
I found this solution here: https://stackoverflow.com/a/11050880/1695680
Just to update this thread, here is how to add a list (as a json array) into JSONObject. Plz substitute YourClass with your class name;
List<YourClass> list = new ArrayList<>();
JSONObject jsonObject = new JSONObject();
org.codehaus.jackson.map.ObjectMapper objectMapper = new
org.codehaus.jackson.map.ObjectMapper();
org.codehaus.jackson.JsonNode listNode = objectMapper.valueToTree(list);
org.json.JSONArray request = new org.json.JSONArray(listNode.toString());
jsonObject.put("list", request);
You can try this query in any given SQL Server database:
SELECT
name,
create_date,
modify_date
FROM sys.procedures
WHERE create_date = '20120927'
which lists out the name, the creation and the last modification date - unfortunately, it doesn't record who created and/or modified the stored procedure in question.
Just ask it for the objectForKey:@"b"
. If it returns nil
, no object is set at that key.
if ([xyz objectForKey:@"b"]) {
NSLog(@"There's an object set for key @\"b\"!");
} else {
NSLog(@"No object set for key @\"b\"");
}
Edit: As to your edited second question, it's simply NSUInteger mCount = [xyz count];
. Both of these answers are documented well and easily found in the NSDictionary class reference ([1] [2]).
To add ANDROID_HOME value permanently,
gedit ~/.bashrc
and add the following lines
export ANDROID_HOME=/root/Android/Sdk
PATH=$PATH:$ANDROID_HOME/tools
Save the file and you need not update ANDROID_HOME value everytime.
Here is my method to cast an object but not to a generic type variable, rather to a System.Type
dynamically:
I create a lambda expression at run-time using System.Linq.Expressions
, of type Func<object, object>
, that unboxes its input, performs the desired type conversion then gives the result boxed. A new one is needed not only for all types that get casted to, but also for the types that get casted (because of the unboxing step). Creating these expressions is highly time consuming, because of the reflection, the compilation and the dynamic method building that is done under the hood. Luckily once created, the expressions can be invoked repeatedly and without high overhead, so I cache each one.
private static Func<object, object> MakeCastDelegate(Type from, Type to)
{
var p = Expression.Parameter(typeof(object)); //do not inline
return Expression.Lambda<Func<object, object>>(
Expression.Convert(Expression.ConvertChecked(Expression.Convert(p, from), to), typeof(object)),
p).Compile();
}
private static readonly Dictionary<Tuple<Type, Type>, Func<object, object>> CastCache
= new Dictionary<Tuple<Type, Type>, Func<object, object>>();
public static Func<object, object> GetCastDelegate(Type from, Type to)
{
lock (CastCache)
{
var key = new Tuple<Type, Type>(from, to);
Func<object, object> cast_delegate;
if (!CastCache.TryGetValue(key, out cast_delegate))
{
cast_delegate = MakeCastDelegate(from, to);
CastCache.Add(key, cast_delegate);
}
return cast_delegate;
}
}
public static object Cast(Type t, object o)
{
return GetCastDelegate(o.GetType(), t).Invoke(o);
}
Note that this isn't magic. Casting doesn't occur in code, as it does with the dynamic
keyword, only the underlying data of the object gets converted. At compile-time we are still left to painstakingly figure out exactly what type our object might be, making this solution impractical. I wrote this as a hack to invoke conversion operators defined by arbitrary types, but maybe somebody out there can find a better use case.
select * from all_constraints
where owner = '<NAME>'
and constraint_name = 'SYS_C00381400'
/
Like all data dictionary views, this a USER_CONSTRAINTS view if you just want to check your current schema and a DBA_CONSTRAINTS view for administration users.
The construction of the constraint name indicates a system generated constraint name. For instance, if we specify NOT NULL in a table declaration. Or indeed a primary or unique key. For example:
SQL> create table t23 (id number not null primary key)
2 /
Table created.
SQL> select constraint_name, constraint_type
2 from user_constraints
3 where table_name = 'T23'
4 /
CONSTRAINT_NAME C
------------------------------ -
SYS_C00935190 C
SYS_C00935191 P
SQL>
'C'
for check, 'P'
for primary.
Generally it's a good idea to give relational constraints an explicit name. For instance, if the database creates an index for the primary key (which it will do if that column is not already indexed) it will use the constraint name oo name the index. You don't want a database full of indexes named like SYS_C00935191
.
To be honest most people don't bother naming NOT NULL constraints.
No need for Xargs and all , ls is more than enough.
ls -1 *.txt
displays row wise
// Create a places array which holds the index for each item in the
// passed in array.
//
// Then return a new array by randomly selecting items from the
// passed in array by referencing the places array item. Removing that
// places item each time though.
function shuffle(array) {
let places = array.map((item, index) => index);
return array.map((item, index, array) => {
const random_index = Math.floor(Math.random() * places.length);
const places_value = places[random_index];
places.splice(random_index, 1);
return array[places_value];
})
}
It's a blend of coding styles. One school of thought is to preface private members with an underscore to distinguish them.
setBar( int bar)
{
_bar = bar;
}
instead of
setBar( int bar)
{
this.bar = bar;
}
Others will use underscores to indicate a temp local variable that will go out of scope at the end of the method call. (I find this pretty useless - a good method shouldn't be that long, and the declaration is RIGHT THERE! so I know it goes out of scope) Edit: God forbid a programmer from this school and a programmer from the memberData school collaborate! It would be hell.
Sometimes, generated code will preface variables with _ or __. The idea being that no human would ever do this, so it's safe.
I had this problem and i solved it recently by doing this in Netbeans 8 (Refer to the image below):
You can also put this IndexIgnore *
at your root .htaccess file to disable file listing of all of your website directories including sub-dir
$(( ( RANDOM % 10 ) + 1 ))
EDIT. Changed brackets into parenthesis according to the comment. http://web.archive.org/web/20150206070451/http://islandlinux.org/howto/generate-random-numbers-bash-scripting
You can use this attributes:
background-size: contain;
background-repeat: no-repeat;
and you code is then like this:
<div style="text-align:center;background-image: url(/media/img_1_bg.jpg); background-size: contain;
background-repeat: no-repeat;" id="mainpage">
You say that you already tried onStatusChanged(), but that does work for me.
Here's the method I use (I let the class itself handle the onStatusChanged):
private void startLocationTracking() {
final int updateTime = 2000; // ms
final int updateDistance = 10; // meter
final Criteria criteria = new Criteria();
criteria.setCostAllowed(false);
criteria.setAccuracy(Criteria.ACCURACY_FINE);
final String p = locationManager.getBestProvider(criteria, true);
locationManager.requestLocationUpdates(p, updateTime, updateDistance,
this);
}
And I handle the onStatusChanged as follows:
void onStatusChanged(final String provider, final int status,
final Bundle extras) {
switch (status) {
case LocationProvider.OUT_OF_SERVICE:
if (location == null || location.getProvider().equals(provider)) {
statusString = "No Service";
location = null;
}
break;
case LocationProvider.TEMPORARILY_UNAVAILABLE:
if (location == null || location.getProvider().equals(provider)) {
statusString = "no fix";
}
break;
case LocationProvider.AVAILABLE:
statusString = "fix";
break;
}
}
Note that the onProvider{Dis,En}abled() methods are about enabling and disabling GPS tracking by the user; not what you're looking for.
You almost always want autocrlf=input
unless you really know what you are doing.
Some additional context below:
It should be either
core.autocrlf=true
if you like DOS ending orcore.autocrlf=input
if you prefer unix-newlines. In both cases, your Git repository will have only LF, which is the Right Thing. The only argument forcore.autocrlf=false
was that automatic heuristic may incorrectly detect some binary as text and then your tile will be corrupted. So,core.safecrlf
option was introduced to warn a user if a irreversable change happens. In fact, there are two possibilities of irreversable changes -- mixed line-ending in text file, in this normalization is desirable, so this warning can be ignored, or (very unlikely) that Git incorrectly detected your binary file as text. Then you need to use attributes to tell Git that this file is binary.
The above paragraph was originally pulled from a thread on gmane.org, but it has since gone down.
In Rails 3, Application specific custom configuration data can be placed in the application configuration object. The configuration can be assigned in the initialization files or the environment files -- say for a given application MyApp
:
MyApp::Application.config.custom_config_variable = :my_config_setting
or
Rails.configuration.custom_config_variable = :my_config_setting
To read the setting, simply call the configuration variable without setting it:
Rails.configuration.custom_config_variable
=> :my_config_setting
UPDATE Rails 4
In Rails 4 there a new way for this => http://guides.rubyonrails.org/configuring.html#custom-configuration
I had same issue and the solution was to rename name
field in package.json (remove white spaces)
A couple of general tips (besides the DOS line ending issue):
cat
is for concatenating files, it's not the only tool that can read files! If a command doesn't read files then use redirection like command < file
.
You can set the field separator with the -F
option so instead of:
cat foo | awk 'BEGIN{FS="|"} {print $2 " " $1}'
Try:
awk -F'|' '{print $2" "$1}' foo
This will output:
com.emailclient.account [email protected]
com.socialsite.auth.accoun [email protected]
To get the desired output you could do a variety of things. I'd probably split()
the second field:
awk -F'|' '{split($2,a,".");print a[2]" "$1}' file
emailclient [email protected]
socialsite [email protected]
Finally to get the first character converted to uppercase is a bit of a pain in awk
as you don't have a nice built in ucfirst()
function:
awk -F'|' '{split($2,a,".");print toupper(substr(a[2],1,1)) substr(a[2],2),$1}' file
Emailclient [email protected]
Socialsite [email protected]
If you want something more concise (although you give up a sub-process) you could do:
awk -F'|' '{split($2,a,".");print a[2]" "$1}' file | sed 's/^./\U&/'
Emailclient [email protected]
Socialsite [email protected]
Try inserting this clearing div before the last </div>
<div style="clear: both; line-height: 0;"> </div>
we are using the Sonatype Nexus, version is Nexus Repository ManagerOSS 3.6.1-02. And I am sure that it supports NPM private repository and cached the package.
Is this what you need?
DataTable myDataTable = new DataTable();
List<int> myList = new List<int>();
foreach (DataRow row in myDataTable.Rows)
{
myList.Add((int)row[0]);
}
You can check the latest C# versions here
https://www.postgresql.org/docs/8.4/functions-formatting.html
SELECT to_char(date_field, 'DD/MM/YYYY')
FROM table
Use where_in()
$ids = array('20', '15', '22', '46', '86');
$this->db->where_in('id', $ids );
I think the annotation you are looking for is:
public class CompanyName implements Serializable {
//...
@JoinColumn(name = "COMPANY_ID", referencedColumnName = "COMPANY_ID", insertable = false, updatable = false)
private Company company;
And you should be able to use similar mappings in a hbm.xml as shown here (in 23.4.2):
http://docs.jboss.org/hibernate/core/3.3/reference/en/html/example-mappings.html
I needed a more dynamic solution to this - where I could increment the repeat.
HTML
<div ng-repeat="n in newUserCount">
<input type="text" value="" name="newuser{{n}}"/>
</div>
Duplicator Control
<span class="helper" ng-click="duplicateUser()">
Create another user with the same permissions
</span>
JS
$scope.newUserCount = Array('1');
var primaryValue = 1;
$scope.duplicateUser = function()
{
primaryValue++;
$scope.newUserCount.push(primaryValue)
}
You want to do $arrayOfString[0].Title -eq $myPbiject.item(0).Title
-match
is for regex matching ( the second argument is a regex )
Some parts of each of these answers work. I compiled them all down into a function "isset" just like the question was asking and works like it does in PHP.
// isset helper function var isset = function(variable){ return typeof(variable) !== "undefined" && variable !== null && variable !== ''; }
Here is a usage example of how to use it:
var example = 'this is an example';
if(isset(example)){
console.log('the example variable has a value set');
}
It depends on the situation you need it for but let me break down what each part does:
typeof(variable) !== "undefined"
checks if the variable is defined at allvariable !== null
checks if the variable is null (some people explicitly set null and don't think if it is set to null that that is correct, in that case, remove this part)variable !== ''
checks if the variable is set to an empty string, you can remove this if an empty string counts as set for your use caseHope this helps someone :)
You cannot concatenate multiple fields with a string. You need to select a field instand of all (*
).
For the replacement string and the replacement pattern as specified by $
.
here a resume:
link to doc : here
"hello _there_".replace(/_(.*?)_/g, "<div>$1</div>")
Note:
If you want to have a $
in the replacement string use $$
. Same as with vscode snippet system.
This is a way:
Bash:
max=10
for i in $(bash -c "echo {2..${max}}"); do echo $i; done
The above Bash way will work for ksh
and zsh
too, when bash -c
is replaced with ksh -c
or zsh -c
respectively.
Note: for i in {2..${max}}; do echo $i; done
works in zsh
and ksh
.
Let's say the name was used in a variable, $Name
.
You then run this query:
INSERT INTO Students VALUES ( '$Name' )
The code is mistakenly placing anything the user supplied as the variable.
You wanted the SQL to be:
INSERT INTO Students VALUES ( 'Robert Tables` )
But a clever user can supply whatever they want:
INSERT INTO Students VALUES ( 'Robert'); DROP TABLE Students; --' )
What you get is:
INSERT INTO Students VALUES ( 'Robert' ); DROP TABLE STUDENTS; --' )
The --
only comments the remainder of the line.
Sometimes the parent ppid cannot be killed, hence kill the zombie pid
kill -9 $(ps -A -ostat,pid | awk '/[zZ]/{ print $2 }')
This means your MySQL table is corrupted and you need to repair it. Use
myisamchk -r /DB_NAME/wp_posts
from the command line. While you running the repair you should shut down your website temporarily so that no new connections are attempted to your database while its being repaired.
Try:
my_command || { echo 'my_command failed' ; exit 1; }
Four changes:
&&
to ||
{ }
in place of ( )
;
after exit
and{
and before }
Since you want to print the message and exit only when the command fails ( exits with non-zero value) you need a ||
not an &&
.
cmd1 && cmd2
will run cmd2
when cmd1
succeeds(exit value 0
). Where as
cmd1 || cmd2
will run cmd2
when cmd1
fails(exit value non-zero).
Using ( )
makes the command inside them run in a sub-shell and calling a exit
from there causes you to exit the sub-shell and not your original shell, hence execution continues in your original shell.
To overcome this use { }
The last two changes are required by bash.
I did some benchmarks to compare the execution time of COUNT(*)
vs COUNT(id)
(id is the primary key of the table - indexed).
Number of trials: 10 * 1000 queries
Results:
COUNT(*)
is faster 7%
VIEW GRAPH: benchmarkgraph
My advice is to use: SELECT COUNT(*) FROM table
You should \usepackage{longtable}
.
You should wrap your recursive function call into a
setTimeout
,setImmediate
or process.nextTick
function to give node.js the chance to clear the stack. If you don't do that and there are many loops without any real async function call or if you do not wait for the callback, your RangeError: Maximum call stack size exceeded
will be inevitable.
There are many articles concerning "Potential Async Loop". Here is one.
Now some more example code:
// ANTI-PATTERN
// THIS WILL CRASH
var condition = false, // potential means "maybe never"
max = 1000000;
function potAsyncLoop( i, resume ) {
if( i < max ) {
if( condition ) {
someAsyncFunc( function( err, result ) {
potAsyncLoop( i+1, callback );
});
} else {
// this will crash after some rounds with
// "stack exceed", because control is never given back
// to the browser
// -> no GC and browser "dead" ... "VERY BAD"
potAsyncLoop( i+1, resume );
}
} else {
resume();
}
}
potAsyncLoop( 0, function() {
// code after the loop
...
});
This is right:
var condition = false, // potential means "maybe never"
max = 1000000;
function potAsyncLoop( i, resume ) {
if( i < max ) {
if( condition ) {
someAsyncFunc( function( err, result ) {
potAsyncLoop( i+1, callback );
});
} else {
// Now the browser gets the chance to clear the stack
// after every round by getting the control back.
// Afterwards the loop continues
setTimeout( function() {
potAsyncLoop( i+1, resume );
}, 0 );
}
} else {
resume();
}
}
potAsyncLoop( 0, function() {
// code after the loop
...
});
Now your loop may become too slow, because we loose a little time (one browser roundtrip) per round. But you do not have to call setTimeout
in every round. Normally it is o.k. to do it every 1000th time. But this may differ depending on your stack size:
var condition = false, // potential means "maybe never"
max = 1000000;
function potAsyncLoop( i, resume ) {
if( i < max ) {
if( condition ) {
someAsyncFunc( function( err, result ) {
potAsyncLoop( i+1, callback );
});
} else {
if( i % 1000 === 0 ) {
setTimeout( function() {
potAsyncLoop( i+1, resume );
}, 0 );
} else {
potAsyncLoop( i+1, resume );
}
}
} else {
resume();
}
}
potAsyncLoop( 0, function() {
// code after the loop
...
});
ALTER SCHEMA TargetSchema
TRANSFER SourceSchema.TableName;
If you want to move all tables into a new schema, you can use the undocumented (and to be deprecated at some point, but unlikely!) sp_MSforeachtable
stored procedure:
exec sp_MSforeachtable "ALTER SCHEMA TargetSchema TRANSFER ?"
Ref.: ALTER SCHEMA
filter expects to get a function and something that it can iterate over. The function should return True or False for each element in the iterable. In your particular example, what you're looking to do is something like the following:
In [47]: def greetings(x):
....: return x == "hello"
....:
In [48]: filter(greetings, ["hello", "goodbye"])
Out[48]: ['hello']
Note that in Python 3, it may be necessary to use list(filter(greetings, ["hello", "goodbye"]))
to get this same result.
I had the same error:
"Syntax error, unrecognized expression: // "
It is known bug at JQuery, so i needed to think on workaround solution,
What I did is:
I changed "script" tag to "div"
and added at angular this code
and the error is gone...
app.run(['$templateCache', function($templateCache) {
var url = "survey-input.html";
content = angular.element(document.getElementById(url)).html()
$templateCache.put(url, content);
}]);
This should work:
DateTime.Now.ToString("hh.mm.ss.ffffff");
If you don't need it to be displayed and just need to know the time difference, well don't convert it to a String. Just leave it as, DateTime.Now();
And use TimeSpan
to know the difference between time intervals:
Example
DateTime start;
TimeSpan time;
start = DateTime.Now;
//Do something here
time = DateTime.Now - start;
label1.Text = String.Format("{0}.{1}", time.Seconds, time.Milliseconds.ToString().PadLeft(3, '0'));
Animations are not supported on table rows.
From "Learning jQuery" by Chaffer and Swedberg
Table rows present particular obstacles to animation, since browsers use different values (table-row and block) for their visible display property. The .hide() and .show() methods, without animation, are always safe to use with table rows. As of jQuery version 1.1.3, .fadeIn() and .fadeOut() can be used as well.
You can wrap your td contents in a div and use the slideDown on that. You need to decide if the animation is worth the extra markup.
some sources prefere to use .env.development
and .env.production
but that's not obligatory.
it seems that if your environment variable does not start like that so you will have problems
to include your environment variable just put on your code process.env.REACT_APP_VARIABLE
You don't have to install any external dependency
A very old question I know but...
A pandas DataFrame seems to be the ideal option here.
http://pandas.pydata.org/pandas-docs/version/0.13.1/generated/pandas.DataFrame.html
From the blurb
Two-dimensional size-mutable, potentially heterogeneous tabular data structure with labeled axes (rows and columns). Arithmetic operations align on both row and column labels. Can be thought of as a dict-like container for Series objects. The primary pandas data structure
/**
* Intent to Send SMS
*
*
* Extras:
*
* "subject"
* A string for the message subject (usually for MMS only).
* "sms_body"
* A string for the text message.
* EXTRA_STREAM
* A Uri pointing to the image or video to attach.
*
* For More Info:
* https://developer.android.com/guide/components/intents-common#SendMessage
*
* @param phoneNumber on which SMS to send
* @param message text Message to send with SMS
*/
public void startSMSIntent(String phoneNumber, String message) {
Intent intent = new Intent(Intent.ACTION_SENDTO);
// This ensures only SMS apps respond
intent.setData(Uri.parse("smsto:"+phoneNumber));
intent.putExtra("sms_body", message);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
}
}
Convert it back to datetime after converting to date in order to keep same datatime if needed
select Convert(datetime, Convert(date, getdate()) )
In case of float values with characters 'e' '+' it errors out if we try to convert in decimal. ('2.81104e+006'). It still pass ISNUMERIC test.
SELECT ISNUMERIC('2.81104e+006')
returns 1
.
SELECT convert(decimal(15,2), '2.81104e+006')
returns
error: Error converting data type varchar to numeric.
And
SELECT try_convert(decimal(15,2), '2.81104e+006')
returns NULL
.
SELECT convert(float, '2.81104e+006')
returns the correct value 2811040
.
As always, the Advanced Bash Scripting Guide has great information: (This was linked in another answer, but to a non-canonical URL.)
1: Catchall for general errors
2: Misuse of shell builtins (according to Bash documentation)
126: Command invoked cannot execute
127: "command not found"
128: Invalid argument to exit
128+n: Fatal error signal "n"
255: Exit status out of range (exit takes only integer args in the range 0 - 255)
The ABSG references sysexits.h
.
On Linux:
$ find /usr -name sysexits.h
/usr/include/sysexits.h
$ cat /usr/include/sysexits.h
/*
* Copyright (c) 1987, 1993
* The Regents of the University of California. All rights reserved.
(A whole bunch of text left out.)
#define EX_OK 0 /* successful termination */
#define EX__BASE 64 /* base value for error messages */
#define EX_USAGE 64 /* command line usage error */
#define EX_DATAERR 65 /* data format error */
#define EX_NOINPUT 66 /* cannot open input */
#define EX_NOUSER 67 /* addressee unknown */
#define EX_NOHOST 68 /* host name unknown */
#define EX_UNAVAILABLE 69 /* service unavailable */
#define EX_SOFTWARE 70 /* internal software error */
#define EX_OSERR 71 /* system error (e.g., can't fork) */
#define EX_OSFILE 72 /* critical OS file missing */
#define EX_CANTCREAT 73 /* can't create (user) output file */
#define EX_IOERR 74 /* input/output error */
#define EX_TEMPFAIL 75 /* temp failure; user is invited to retry */
#define EX_PROTOCOL 76 /* remote error in protocol */
#define EX_NOPERM 77 /* permission denied */
#define EX_CONFIG 78 /* configuration error */
#define EX__MAX 78 /* maximum listed value */
You can program defensively, and do your import as:
try:
from urllib.request import urlopen
except ImportError:
from urllib2 import urlopen
and then in the code, just use:
data = urlopen(MIRRORS).read(AMOUNT2READ)
try to add ojdbc6.jar through the server lib "C:\apache-tomcat-7.0.47\lib",
Then restart the server in eclipse.
in your setChilds, you might want to try looping thru the list and doing something like
child.parent = this;
you also should set up the cascade on the parent to the appropriate values.
Isn't a For Loop technically a Do While?
E.g.
for (int i = 0; i < length; ++i)
{
//Code Here.
}
would be...
int i = 0;
do
{
//Code Here.
} while (++i < length);
I could be wrong though...
Also when it comes to for loops. If you plan to only retrieve data and never modify data you should use a foreach. If you require the actual indexes for some reason you'll need to increment so you should use the regular for loop.
for (Data d : data)
{
d.doSomething();
}
should be faster than...
for (int i = 0; i < data.length; ++i)
{
data[i].doSomething();
}
I use Node.js at work, and find it to be very powerful. Forced to choose one word to describe Node.js, I'd say "interesting" (which is not a purely positive adjective). The community is vibrant and growing. JavaScript, despite its oddities can be a great language to code in. And you will daily rethink your own understanding of "best practice" and the patterns of well-structured code. There's an enormous energy of ideas flowing into Node.js right now, and working in it exposes you to all this thinking - great mental weightlifting.
Node.js in production is definitely possible, but far from the "turn-key" deployment seemingly promised by the documentation. With Node.js v0.6.x, "cluster" has been integrated into the platform, providing one of the essential building blocks, but my "production.js" script is still ~150 lines of logic to handle stuff like creating the log directory, recycling dead workers, etc. For a "serious" production service, you also need to be prepared to throttle incoming connections and do all the stuff that Apache does for PHP. To be fair, Ruby on Rails has this exact problem. It is solved via two complementary mechanisms: 1) Putting Ruby on Rails/Node.js behind a dedicated webserver (written in C and tested to hell and back) like Nginx (or Apache / Lighttd). The webserver can efficiently serve static content, access logging, rewrite URLs, terminate SSL, enforce access rules, and manage multiple sub-services. For requests that hit the actual node service, the webserver proxies the request through. 2) Using a framework like Unicorn that will manage the worker processes, recycle them periodically, etc. I've yet to find a Node.js serving framework that seems fully baked; it may exist, but I haven't found it yet and still use ~150 lines in my hand-rolled "production.js".
Reading frameworks like Express makes it seem like the standard practice is to just serve everything through one jack-of-all-trades Node.js service ... "app.use(express.static(__dirname + '/public'))". For lower-load services and development, that's probably fine. But as soon as you try to put big time load on your service and have it run 24/7, you'll quickly discover the motivations that push big sites to have well baked, hardened C-code like Nginx fronting their site and handling all of the static content requests (...until you set up a CDN, like Amazon CloudFront)). For a somewhat humorous and unabashedly negative take on this, see this guy.
Node.js is also finding more and more non-service uses. Even if you are using something else to serve web content, you might still use Node.js as a build tool, using npm modules to organize your code, Browserify to stitch it into a single asset, and uglify-js to minify it for deployment. For dealing with the web, JavaScript is a perfect impedance match and frequently that makes it the easiest route of attack. For example, if you want to grovel through a bunch of JSON response payloads, you should use my underscore-CLI module, the utility-belt of structured data.
For another perspective on JavaScript and Node.js, check out From Java to Node.js, a blog post on a Java developer's impressions and experiences learning Node.js.
Modules When considering node, keep in mind that your choice of JavaScript libraries will DEFINE your experience. Most people use at least two, an asynchronous pattern helper (Step, Futures, Async), and a JavaScript sugar module (Underscore.js).
Helper / JavaScript Sugar:
Asynchronous Pattern Modules:
Or to read all about the asynchronous libraries, see this panel-interview with the authors.
Web Framework:
Testing:
Also, check out the official list of recommended Node.js modules. However, GitHub's Node Modules Wiki is much more complete and a good resource.
To understand Node, it's helpful to consider a few of the key design choices:
Node.js is EVENT BASED and ASYNCHRONOUS / NON-BLOCKING. Events, like an incoming HTTP connection will fire off a JavaScript function that does a little bit of work and kicks off other asynchronous tasks like connecting to a database or pulling content from another server. Once these tasks have been kicked off, the event function finishes and Node.js goes back to sleep. As soon as something else happens, like the database connection being established or the external server responding with content, the callback functions fire, and more JavaScript code executes, potentially kicking off even more asynchronous tasks (like a database query). In this way, Node.js will happily interleave activities for multiple parallel workflows, running whatever activities are unblocked at any point in time. This is why Node.js does such a great job managing thousands of simultaneous connections.
Why not just use one process/thread per connection like everyone else? In Node.js, a new connection is just a very small heap allocation. Spinning up a new process takes significantly more memory, a megabyte on some platforms. But the real cost is the overhead associated with context-switching. When you have 10^6 kernel threads, the kernel has to do a lot of work figuring out who should execute next. A bunch of work has gone into building an O(1) scheduler for Linux, but in the end, it's just way way more efficient to have a single event-driven process than 10^6 processes competing for CPU time. Also, under overload conditions, the multi-process model behaves very poorly, starving critical administration and management services, especially SSHD (meaning you can't even log into the box to figure out how screwed it really is).
Node.js is SINGLE THREADED and LOCK FREE. Node.js, as a very deliberate design choice only has a single thread per process. Because of this, it's fundamentally impossible for multiple threads to access data simultaneously. Thus, no locks are needed. Threads are hard. Really really hard. If you don't believe that, you haven't done enough threaded programming. Getting locking right is hard and results in bugs that are really hard to track down. Eliminating locks and multi-threading makes one of the nastiest classes of bugs just go away. This might be the single biggest advantage of node.
But how do I take advantage of my 16 core box?
Two ways:
Node.js lets you do some really powerful things without breaking a sweat. Suppose you have a Node.js program that does a variety of tasks, listens on a TCP port for commands, encodes some images, whatever. With five lines of code, you can add in an HTTP based web management portal that shows the current status of active tasks. This is EASY to do:
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end(myJavascriptObject.getSomeStatusInfo());
}).listen(1337, "127.0.0.1");
Now you can hit a URL and check the status of your running process. Add a few buttons, and you have a "management portal". If you have a running Perl / Python / Ruby script, just "throwing in a management portal" isn't exactly simple.
But isn't JavaScript slow / bad / evil / spawn-of-the-devil? JavaScript has some weird oddities, but with "the good parts" there's a very powerful language there, and in any case, JavaScript is THE language on the client (browser). JavaScript is here to stay; other languages are targeting it as an IL, and world class talent is competing to produce the most advanced JavaScript engines. Because of JavaScript's role in the browser, an enormous amount of engineering effort is being thrown at making JavaScript blazing fast. V8 is the latest and greatest javascript engine, at least for this month. It blows away the other scripting languages in both efficiency AND stability (looking at you, Ruby). And it's only going to get better with huge teams working on the problem at Microsoft, Google, and Mozilla, competing to build the best JavaScript engine (It's no longer a JavaScript "interpreter" as all the modern engines do tons of JIT compiling under the hood with interpretation only as a fallback for execute-once code). Yeah, we all wish we could fix a few of the odder JavaScript language choices, but it's really not that bad. And the language is so darn flexible that you really aren't coding JavaScript, you are coding Step or jQuery -- more than any other language, in JavaScript, the libraries define the experience. To build web applications, you pretty much have to know JavaScript anyway, so coding with it on the server has a sort of skill-set synergy. It has made me not dread writing client code.
Besides, if you REALLY hate JavaScript, you can use syntactic sugar like CoffeeScript. Or anything else that creates JavaScript code, like Google Web Toolkit (GWT).
Speaking of JavaScript, what's a "closure"? - Pretty much a fancy way of saying that you retain lexically scoped variables across call chains. ;) Like this:
var myData = "foo";
database.connect( 'user:pass', function myCallback( result ) {
database.query("SELECT * from Foo where id = " + myData);
} );
// Note that doSomethingElse() executes _BEFORE_ "database.query" which is inside a callback
doSomethingElse();
See how you can just use "myData" without doing anything awkward like stashing it into an object? And unlike in Java, the "myData" variable doesn't have to be read-only. This powerful language feature makes asynchronous-programming much less verbose and less painful.
Writing asynchronous code is always going to be more complex than writing a simple single-threaded script, but with Node.js, it's not that much harder and you get a lot of benefits in addition to the efficiency and scalability to thousands of concurrent connections...
If you have Spring in you classpath then the following will do it.
Find all classes in a package that are annotated with XmlRootElement:
private List<Class> findMyTypes(String basePackage) throws IOException, ClassNotFoundException
{
ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory(resourcePatternResolver);
List<Class> candidates = new ArrayList<Class>();
String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX +
resolveBasePackage(basePackage) + "/" + "**/*.class";
Resource[] resources = resourcePatternResolver.getResources(packageSearchPath);
for (Resource resource : resources) {
if (resource.isReadable()) {
MetadataReader metadataReader = metadataReaderFactory.getMetadataReader(resource);
if (isCandidate(metadataReader)) {
candidates.add(Class.forName(metadataReader.getClassMetadata().getClassName()));
}
}
}
return candidates;
}
private String resolveBasePackage(String basePackage) {
return ClassUtils.convertClassNameToResourcePath(SystemPropertyUtils.resolvePlaceholders(basePackage));
}
private boolean isCandidate(MetadataReader metadataReader) throws ClassNotFoundException
{
try {
Class c = Class.forName(metadataReader.getClassMetadata().getClassName());
if (c.getAnnotation(XmlRootElement.class) != null) {
return true;
}
}
catch(Throwable e){
}
return false;
}
find supports wildcard matches, just add a *
:
find / -type d -name "ora10*"
Here is another solution
Set a hidden scope variable in your html then you can use it from your controller:
<span style="display:none" >{{ formValid = myForm.$valid}}</span>
Here is the full working example:
angular.module('App', [])_x000D_
.controller('myController', function($scope) {_x000D_
$scope.userType = 'guest';_x000D_
$scope.formValid = false;_x000D_
console.info('Ctrl init, no form.');_x000D_
_x000D_
$scope.$watch('myForm', function() {_x000D_
console.info('myForm watch');_x000D_
console.log($scope.formValid);_x000D_
});_x000D_
_x000D_
$scope.isFormValid = function() {_x000D_
//test the new scope variable_x000D_
console.log('form valid?: ', $scope.formValid);_x000D_
};_x000D_
});
_x000D_
<!doctype html>_x000D_
<html ng-app="App">_x000D_
<head>_x000D_
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.1/angular.min.js"></script>_x000D_
</head>_x000D_
<body>_x000D_
_x000D_
<form name="myForm" ng-controller="myController">_x000D_
userType: <input name="input" ng-model="userType" required>_x000D_
<span class="error" ng-show="myForm.input.$error.required">Required!</span><br>_x000D_
<tt>userType = {{userType}}</tt><br>_x000D_
<tt>myForm.input.$valid = {{myForm.input.$valid}}</tt><br>_x000D_
<tt>myForm.input.$error = {{myForm.input.$error}}</tt><br>_x000D_
<tt>myForm.$valid = {{myForm.$valid}}</tt><br>_x000D_
<tt>myForm.$error.required = {{!!myForm.$error.required}}</tt><br>_x000D_
_x000D_
_x000D_
/*-- Hidden Variable formValid to use in your controller --*/_x000D_
<span style="display:none" >{{ formValid = myForm.$valid}}</span>_x000D_
_x000D_
_x000D_
<br/>_x000D_
<button ng-click="isFormValid()">Check Valid</button>_x000D_
</form>_x000D_
</body>_x000D_
</html>
_x000D_
What worked for me was,
chmod -R 0777 /opt/lampp/htdocs/
This will do:
/^(apple|banana)$/
to exclude from captured strings (e.g. $1
,$2
):
(?:apple|banana)
try the following:
myPictureBox.Image = global::mynamespace.Properties.Resources.photo1;
and replace namespace with your project namespace
First, get the LocationManager. Then, call LocationManager.getLastKnownPosition
. Then create a GeoCoder and call GeoCoder.getFromLocation
. Do this is in a separate thread!! This will give you a list of Address
objects. Call Address.getCountryName
and you got it.
Keep in mind that the last known position can be a bit stale, so if the user just crossed the border, you may not know about it for a while.
When you are creating an object of intent, you can take advantage of following two methods for passing objects between two activities.
You can have your class implement either Parcelable or Serializable. Then you can pass around your custom classes across activities. I have found this very useful.
Here is a small snippet of code I am using
CustomListing currentListing = new CustomListing();
Intent i = new Intent();
Bundle b = new Bundle();
b.putParcelable(Constants.CUSTOM_LISTING, currentListing);
i.putExtras(b);
i.setClass(this, SearchDetailsActivity.class);
startActivity(i);
And in newly started activity code will be something like this...
Bundle b = this.getIntent().getExtras();
if (b != null)
mCurrentListing = b.getParcelable(Constants.CUSTOM_LISTING);
Use the Underscore.js findWhere function (http://underscorejs.org/#findWhere):
var purposeObjects = [
{purpose: "daily"},
{purpose: "weekly"},
{purpose: "monthly"}
];
var daily = _.findWhere(purposeObjects, {purpose: 'daily'});
daily
would equal:
{"purpose":"daily"}
Here's a fiddle: http://jsfiddle.net/spencerw/oqbgc21x/
To return more than one (if you had more in your array) you could use _.where(...)
To declare it:
var myArr = ["apples", "oranges", "bananas"];
To use it:
document.write("In my shopping basket I have " + myArr[0] + ", " + myArr[1] + ", and " + myArr[2]);
If you are in a domain environment, you can also use:
winrs -r:PCNAME cmd
This will open a remote command shell.
Make the source sheet visible before copying. Then copy the sheet so that the copy also stays visible. The copy will then be the active sheet. If you want, hide the source sheet again.
Handle the onError
event for the image to reassign its source using JavaScript:
function imgError(image) {
image.onerror = "";
image.src = "/images/noimage.gif";
return true;
}
<img src="image.png" onerror="imgError(this);"/>
Or without a JavaScript function:
<img src="image.png" onError="this.onerror=null;this.src='/images/noimage.gif';" />
The following compatibility table lists the browsers that support the error facility:
If you're using WPF there is a LoadCompleted
event.
If it's Windows.Forms
, the DocumentCompleted
event should be the correct one. If the page you're loading has frames, your WebBrowser
control will fire the DocumentCompleted
event for each frame (see here for more details). I would suggest checking the IsBusy
property each time the event is fired and if it is false then your page is fully done loading.
In your code, try enclosing password inside single quote. Alternatively, as per the documentation of mysql, following should work -
SET PASSWORD FOR 'jeffrey'@'localhost' = PASSWORD('cleartext password');
FLUSH PRIVILEGES;
The last line is important or else your password change won't take effect unfortunately.
EDIT:
I ran a test in my local and it worked -
mysql> set password for 'test' = PASSWORD('$w0rdf1sh');
Query OK, 0 rows affected (0.00 sec)
Mine is version 5. You can use following command to determine your version -
SHOW VARIABLES LIKE "%version%";
If you use CakePHP
you can use their method CakeText::uuid();
from the CakeText class to generate a RFC4122 uuid.
$('#myformelement').append('<input type="hidden" name="myfieldname" value="myvalue" />');
The best way of searching for users is (sAMAccountType=805306368)
.
Or for disabled users:
(&(sAMAccountType=805306368)(userAccountControl:1.2.840.113556.1.4.803:=2))
Or for active users:
(&(sAMAccountType=805306368)(!(userAccountControl:1.2.840.113556.1.4.803:=2)))
I find LDAP as not being so light at it was supposed to be.
Also resource for common LDAP queries - trying to find them yourself and you will precious time and definitely make mistakes.
Regarding domains: it not possible in a single query because the domain is part of the user distinguisedName
(DN
) which, on Microsoft AD, is not searchable by partial matching.
itemgetter
(see other answers) is (as I know) more efficient for large dictionaries but for the common case, I believe that d.get
wins. And it does not require an extra import
.
>>> d = {"aa": 3, "bb": 4, "cc": 2, "dd": 1}
>>> for k in sorted(d, key=d.get, reverse=True):
... k, d[k]
...
('bb', 4)
('aa', 3)
('cc', 2)
('dd', 1)
Note that alternatively you can set d.__getitem__
as key
function which may provide a small performance boost over d.get
.
<div id="normal>text..</div>
<div id="small1" class="smallDiv"></div>
<div id="small2" class="smallDiv"></div>
<div id="small3" class="smallDiv"></div>
css:
.smallDiv { height: 150px; width: 150px; }
I too was searching for this for sometime, and finally was able to do it as I needed, ie Navigation Bar is inaccessible, status bar is inaccessible, even if you long press power button, neither the power menu nor navigation buttons are shown. Thanks to @Assaf Gamliel , his answer took me to the right path.
I followed this tutorial with some slight modifications. While specifying Type, I specified WindowManager.LayoutParams.TYPE_SYSTEM_ERROR
instead of WindowManager.LayoutParams.TYPE_PHONE
, else our "overlay" won't hide the system bars. You can play around with the Flags, Height, Width etc so that it'll behave as you want it to.
Here are conversion method for both ways. this = instance of your class
public string ToXML()
{
using(var stringwriter = new System.IO.StringWriter())
{
var serializer = new XmlSerializer(this.GetType());
serializer.Serialize(stringwriter, this);
return stringwriter.ToString();
}
}
public static YourClass LoadFromXMLString(string xmlText)
{
using(var stringReader = new System.IO.StringReader(xmlText))
{
var serializer = new XmlSerializer(typeof(YourClass ));
return serializer.Deserialize(stringReader) as YourClass ;
}
}
For arbitaray range of month numbers
month_integer=range(0,100)
map(lambda x: calendar.month_name[x%12+start],month_integer)
will yield correct list. Adjust start
-parameter from where January begins in the month-integer list.
You can use the following script in view:
<script type="text/javascript">
var BASE_URL = '<%= ResolveUrl("~/") %>';
</script>
I don't know why everyone is suggesting you should be using instance_methods
and include?
when method_defined?
does the job.
class Test
def hello; end
end
Test.method_defined? :hello #=> true
NOTE
In case you are coming to Ruby from another OO language OR you think that method_defined
means ONLY methods that you defined explicitly with:
def my_method
end
then read this:
In Ruby, a property (attribute) on your model is basically a method also. So method_defined?
will also return true for properties, not just methods.
For example:
Given an instance of a class that has a String attribute first_name
:
<instance>.first_name.class #=> String
<instance>.class.method_defined?(:first_name) #=> true
since first_name
is both an attribute and a method (and a string of type String).
It ignores the cached content when refreshing...
https://support.google.com/a/answer/3001912?hl=en
F5 or Control + R = Reload the current page
Control+Shift+R or Shift + F5 = Reload your current page, ignoring cached content
Windows:
system("cls");
Unix:
system("clear");
You could instead, insert newline chars until everything gets scrolled, take a look here.
With that, you achieve portability easily.
I had the same problem and couldn't find the right solution so I wrote a function called GetFiles:
/// <summary>
/// Get all files with a specific extension
/// </summary>
/// <param name="extensionsToCompare">string list of all the extensions</param>
/// <param name="Location">string of the location</param>
/// <returns>array of all the files with the specific extensions</returns>
public string[] GetFiles(List<string> extensionsToCompare, string Location)
{
List<string> files = new List<string>();
foreach (string file in Directory.GetFiles(Location))
{
if (extensionsToCompare.Contains(file.Substring(file.IndexOf('.')+1).ToLower())) files.Add(file);
}
files.Sort();
return files.ToArray();
}
This function will call Directory.Getfiles()
only one time.
For example call the function like this:
string[] images = GetFiles(new List<string>{"jpg", "png", "gif"}, "imageFolder");
EDIT: To get one file with multiple extensions use this one:
/// <summary>
/// Get the file with a specific name and extension
/// </summary>
/// <param name="filename">the name of the file to find</param>
/// <param name="extensionsToCompare">string list of all the extensions</param>
/// <param name="Location">string of the location</param>
/// <returns>file with the requested filename</returns>
public string GetFile( string filename, List<string> extensionsToCompare, string Location)
{
foreach (string file in Directory.GetFiles(Location))
{
if (extensionsToCompare.Contains(file.Substring(file.IndexOf('.') + 1).ToLower()) &&& file.Substring(Location.Length + 1, (file.IndexOf('.') - (Location.Length + 1))).ToLower() == filename)
return file;
}
return "";
}
For example call the function like this:
string image = GetFile("imagename", new List<string>{"jpg", "png", "gif"}, "imageFolder");
This is more of an observation than an answer, but it may help others who were as frustrated as I was.
I kept getting this error from two tests in my suite. I thought I had simply broken the tests with the refactoring I was doing, so after backing out changes didn't work, I reverted to earlier code, twice (two revisions back) thinking it'd get rid of the error. Doing so changed nothing. I chased my tail all day yesterday, and part of this morning without resolving the issue.
I got frustrated and checked out the code onto a laptop this morning. Ran the entire test suite (about 180 tests), no errors. So the errors were never in the code or tests. Went back to my dev box and rebooted it to clear anything in memory that might have been causing the issue. No change, same errors on the same two tests. So I deleted the directory from my machine, and checked it back out. Voila! No errors.
No idea what caused it, or how to fix it, but deleting the working directory and checking it back out fixed whatever it was.
Hope this helps someone.
In order to obtain a program that generates a list of random values without duplicates that is deterministic, efficient and built with basic programming constructs consider the function extractSamples
defined below,
def extractSamples(populationSize, sampleSize, intervalLst) :
import random
if (sampleSize > populationSize) :
raise ValueError("sampleSize = "+str(sampleSize) +" > populationSize (= " + str(populationSize) + ")")
samples = []
while (len(samples) < sampleSize) :
i = random.randint(0, (len(intervalLst)-1))
(a,b) = intervalLst[i]
sample = random.randint(a,b)
if (a==b) :
intervalLst.pop(i)
elif (a == sample) : # shorten beginning of interval
intervalLst[i] = (sample+1, b)
elif ( sample == b) : # shorten interval end
intervalLst[i] = (a, sample - 1)
else :
intervalLst[i] = (a, sample - 1)
intervalLst.append((sample+1, b))
samples.append(sample)
return samples
The basic idea is to keep track of intervals intervalLst
for possible values from which to select our required elements from. This is deterministic in the sense that we are guaranteed to generate a sample within a fixed number of steps (solely dependent on populationSize
and sampleSize
).
To use the above function to generate our required list,
In [3]: populationSize, sampleSize = 10**17, 10**5
In [4]: %time lst1 = extractSamples(populationSize, sampleSize, [(0, populationSize-1)])
CPU times: user 289 ms, sys: 9.96 ms, total: 299 ms
Wall time: 293 ms
We may also compare with an earlier solution (for a lower value of populationSize)
In [5]: populationSize, sampleSize = 10**8, 10**5
In [6]: %time lst = random.sample(range(populationSize), sampleSize)
CPU times: user 1.89 s, sys: 299 ms, total: 2.19 s
Wall time: 2.18 s
In [7]: %time lst1 = extractSamples(populationSize, sampleSize, [(0, populationSize-1)])
CPU times: user 449 ms, sys: 8.92 ms, total: 458 ms
Wall time: 442 ms
Note that I reduced populationSize
value as it produces Memory Error for higher values when using the random.sample
solution (also mentioned in previous answers here and here). For above values, we can also observe that extractSamples
outperforms the random.sample
approach.
P.S. : Though the core approach is similar to my earlier answer, there are substantial modifications in implementation as well as approach alongwith improvement in clarity.
The command has to be entered in the directory of the repository. The error is complaining that your current directory isn't a git repo
ls
show the right files?git init
? (git-init documentation)Either of those would cause your error.
Working on .Net Core 2.2 and 3.0 as of now.
To get the projects root directory within a Controller:
Create a property for the hosting environment
private readonly IHostingEnvironment _hostingEnvironment;
Add Microsoft.AspNetCore.Hosting to your controller
using Microsoft.AspNetCore.Hosting;
Register the service in the constructor
public HomeController(IHostingEnvironment hostingEnvironment) {
_hostingEnvironment = hostingEnvironment;
}
Now, to get the projects root path
string projectRootPath = _hostingEnvironment.ContentRootPath;
To get the "wwwroot" path, use
_hostingEnvironment.WebRootPath
Oracle does support WITH.
It would look like this.
WITH emps as (SELECT * FROM Employees)
SELECT * FROM emps WHERE ID < 20
UNION ALL
SELECT * FROM emps where Sex = 'F'
@ysth WITH is hard to google because it's a common word typically excluded from searches.
You'd want to look at the SELECT docs to see how subquery factoring works.
I know this doesn't answer the OP but I'm cleaning up any confusion ysth may have started.
UPDATE: installation without root privileges below
I advise you to not install packages manually on ubuntu system if there is already a (semi-official) repository able to solve your problem. Further, use Oracle JDK for development, just to avoid (very sporadic) compatibility issues (i've tried many years ago, it's surely better now).
Add the webupd8 repo to your system:
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
Install your preferred version of jdk (versions from java-6 to java-9 available):
sudo apt-get install oracle-java8-installer
You can also install multiple version of jdk, mixing openjdk and oracle versions. Then you can use the command update-java-alternatives to switch between installed version:
# list available jdk
update-java-alternatives --list
# use jdk7
sudo update-java-alternatives --set java-7-oracle
# use jdk8
sudo update-java-alternatives --set java-8-oracle
Requirements
If you get add-apt-repository: command not found
be sure to have software-properties-common
installed:
sudo apt-get install software-properties-common
If you're using an older version Ubuntu:
sudo apt-get install python-software-properties
JDK installation without root privileges
If you haven't administrator rights on your target machine your simplest bet is to use sdkman
to install the zulu certified openjdk:
curl -s "https://get.sdkman.io" | bash
source "$HOME/.sdkman/bin/sdkman-init.sh"
sdk install java
NOTE: sdkman allow to install also the official Oracle JDK, although it's not a the default option. View available versions with:
sdk ls java
Install the chosen version with:
sdk install java <version>
For example:
sdk install java 9.0.1-oracle
Glossary of commands
sudo <command> [command_arguments]
: execute a command with the superuser privilege.
add-apt-repository <PPA_id>
: Ubuntu (just like every Debian derivatives and generally speaking every Linux distribution) has a main repository of packages that handle things like package dependencies and updating. In Ubuntu is possible to extend the main repository using a PPA (Personal Package Archive) that usually contains packages not available in the system (just like oracle jdk) or updated versions of available ones (example: LibreOffice 5 in LTS is available only through this PPA).
apt-get [install|update|upgrade|purge|...]
: it's "the" command-line package handler used to manipulate the state of every repository on the system (installing / updating / upgrading can be viewed as an alteration of the repository current state).
In our case: with the command sudo add-apt-repository ppa:webupd8team/java
we inform the system that the next repository update must retrieve packages information also from webupd8 repo.
With sudo apt-get update
we actually update the system repository (all this operations requires superuser privileges, so we prepend sudo to the commands).
sudo apt-get install oracle-java8-installer
update-java-alternatives (a specific java version of update-alternatives): in Ubuntu several packages provides the same functionality (browse the internet, compile mails, edit a text file or provides java/javac executables...). To allows the system to choose the user favourites tool given a specific task a mechanism using symlinks under /etc/alternatives/
is used. Try to update the jdk as indicated above (switch between java 7 and java 8) and view how change the output of this command:
ls -l /etc/alternatives/java*
In our case: sudo update-java-alternatives --set java-8-oracle
update symlinks under /etc/alternatives to point to java-8-oracle executables.
Extras:
man <command>
: start using man to read a really well written and detailed help on (almost) every shell command and its options (every command i mention in this little answer has a man page, try man update-java-alternatives
).
apt-cache search <search_key>
: query the APT cache to search for a package related with the search_key provided (can be the package name or some word in package description).
apt-cache show <package>
: provides APT information for a specific package (package version, installed or not, description).
You should make the container relative and give it a height as well and you're done.
http://jsfiddle.net/jaap/wjw83/4/
.main {_x000D_
width: 300px;_x000D_
margin: 0 auto;_x000D_
overflow: hidden;_x000D_
position: relative;_x000D_
height: 200px;_x000D_
}_x000D_
_x000D_
img.absolute {_x000D_
left: 50%;_x000D_
margin-left: -200px;_x000D_
position: absolute;_x000D_
}
_x000D_
<div class="main">_x000D_
<img class="absolute" src="http://via.placeholder.com/400x200/A44/EED?text=Hello" alt="" />_x000D_
</div>_x000D_
<br />_x000D_
<img src="http://via.placeholder.com/400x200/A44/EED?text=Hello" alt="" />
_x000D_
If you want to you can also center the image vertically by adding a negative margin and top position: http://jsfiddle.net/jaap/wjw83/5/
Bad idea, don't do it ever - but here it is how it can be done:
int main()
{
A aObj;
int* ptr;
ptr = (int*)&aObj;
// MODIFY!
*ptr = 100;
}
How to get append input field value as json like
temp:[
{
test:'test 1',
testData: [
{testName: 'do',testId:''}
],
testRcd:'value'
},
{
test:'test 2',
testData: [
{testName: 'do1',testId:''}
],
testRcd:'value'
}
],
i got the same problem after clicking update plugins, i tried all the suggestions above and failed , the only thing that worked for my is reinstalling android studio..
This works on SQL Server 2000.
use master
select count(*) From sysxlogins WHERE NAME = 'myUsername'
on SQL 2005, change the 2nd line to
select count(*) From syslogins WHERE NAME = 'myUsername'
I'm not sure about SQL 2008, but I'm guessing that it will be the same as SQL 2005 and if not, this should give you an idea of where t start looking.
No need to convert the channel to public then make it private.
find the id of your private channel. (There are numerous methods to do this, for example see this SO answer)
curl -X POST "https://api.telegram.org/botxxxxxx:yyyyyyyyyyy/sendMessage" -d "chat_id=-100CHAT_ID&text=my sample text"
replace xxxxxx:yyyyyyyyyyy with your bot id, and replace CHAT_ID with the channel id found in step 1. So if channel id is 1234 it would be chat_id=-1001234.
All done!
I have an Xml File books.xml
<ParameterDBConfig>
<ID Definition="1" />
</ParameterDBConfig>
Program:
XmlDocument doc = new XmlDocument();
doc.Load("D:/siva/books.xml");
XmlNodeList elemList = doc.GetElementsByTagName("ID");
for (int i = 0; i < elemList.Count; i++)
{
string attrVal = elemList[i].Attributes["Definition"].Value;
}
Now, attrVal
has the value of ID
.
What you want is called a zone transfer. You can request a zone transfer using dig -t axfr
.
A zone is a domain and all of the domains below it that are not delegated to another server.
Note that zone transfers are not always supported. They're not used in normal lookup, only in replicating DNS data between servers; but there are other protocols that can be used for that (such as rsync over ssh), there may be a security risk from exposing names, and zone transfer responses cost more to generate and send than usual DNS lookups.
You can use dload
import dload
dload.git_clone("https://github.com/some_repo.git")
pip install dload
Its simple, just make sure the data type in your columns are the same. For e.g. I faced the same error, that and an another error:
Error in
contrasts<-
(*tmp*
, value = contr.funs[1 + isOF[nn]]) : contrasts can be applied only to factors with 2 or more levels
So, I went back to my excel file or csv file, set a filter on the variable throwing me an error and checked if the distinct datatypes are the same. And... Oh! it had numbers and strings, so I converted numbers to string and it worked just fine for me.
I think one of the easiest ways to achieve this is to replace "continue" with "break" statement,i.e.
for ii in range(200):
for jj in range(200, 400):
...block0...
if something:
break
...block1...
For example, here is the easy code to see how exactly it goes on:
for i in range(10):
print("doing outer loop")
print("i=",i)
for p in range(10):
print("doing inner loop")
print("p=",p)
if p==3:
print("breaking from inner loop")
break
print("doing some code in outer loop")
Based on Bootstrap doc:
As of v3.1.0, .pull-right is deprecated on dropdown menus. use .dropdown-menu-right
eg:
<ul class="dropdown-menu dropdown-menu-right" role="menu" aria-labelledby="dLabel">
You need to pass a function pointer. The syntax is a little cumbersome, but it's really powerful once you get familiar with it.
Python allows for private class members with the double underscore prefix. This technique doesn't work at a module level so I am thinking this is a mistake in Dive Into Python.
Here is an example of private class functions:
class foo():
def bar(self): pass
def __bar(self): pass
f = foo()
f.bar() # this call succeeds
f.__bar() # this call fails
Other answers are great, I just want to add... a different approach usable in PowerShell: Install GNUWin32 utils and use grep to view the lines / redirect the output to file http://gnuwin32.sourceforge.net/
This overwrites the new file every time:
grep "step[49]" logIn.log > logOut.log
This appends the log output, in case you overwrite the logIn file and want to keep the data:
grep "step[49]" logIn.log >> logOut.log
Note: to be able to use GNUWin32 utils globally you have to add the bin folder to your system path.
If your output is delimited by tabs a quick solution would be to use the tabs
command to adjust the size of your tabs.
tabs 20
keys | awk '{ print $1"\t\t" $2 }'
Defining session before everything, No output should be before that, NO OUTPUT
<?php
session_start();
?>
Set your session inside a page and then you have access in that page. For example this is page 1.php
<?php
//This is page 1 and then we will use session that defined from this page:
session_start();
$_SESSION['email']='[email protected]';
?>
Using and Getting session in 2.php
<?php
//In this page I am going to use session:
session_start();
if($_SESSION['email']){
echo 'Your Email Is Here! :) ';
}
?>
NOTE: Comments don't have output.
No longer works for spreadsheets Protected with Excel 2013 or later -- they improved the pw hash. So now need to unzip .xlsx and hack the internals.
The main advantage of the builder pattern over factory pattern is in case if you want to create some standard object with lots of possible customizations, but you usually end up customizing just a few.
For example, if you want to write an HTTP Client - you'll set up some default parameters like default write/read timeout, protocols, cache, DNS, interceptors, etc.
Most of the users of your client will just use those default parameters, while some other users might want to customize some of the other parameters. In some cases, you'll just want to change timeouts and use the rest as it is, while in other cases you might need to customize for example the cache.
Here are possible ways of instantiating your client (taken from OkHttpClient):
//just give me the default stuff
HttpClient.Builder().build()
//I want to use custom cache
HttpClient.Builder().cache(MyCache()).build()
//I want custom connection timeout
HttpClient.Builder().connectTimeout(30, TimeUnit.SECONDS).build()
//I am more interested in read/write timeout
HttpClient.Builder()
.readTimeout(30, TimeUnit.SECONDS)
.writeTimeout(30, TimeUnit.SECONDS).build()
If you'd use a factory pattern for this, you'll end up writing a lot of methods with all possible combinations of creational parameters. With the builder, you just specify those you care about and let the builder build it for you taking care of all those other params.
If it is inline, the browser should attempt to render it within the browser window. If it cannot, it will resort to an external program, prompting the user.
With attachment, it will immediately go to the user, and not try to load it in the browser, whether it can or not.
$parts = preg_split('/\s+/', $str);
First, Lateral and Cross Apply is same thing. Therefore you may also read about Cross Apply. Since it was implemented in SQL Server for ages, you will find more information about it then Lateral.
Second, according to my understanding, there is nothing you can not do using subquery instead of using lateral. But:
Consider following query.
Select A.*
, (Select B.Column1 from B where B.Fk1 = A.PK and Limit 1)
, (Select B.Column2 from B where B.Fk1 = A.PK and Limit 1)
FROM A
You can use lateral in this condition.
Select A.*
, x.Column1
, x.Column2
FROM A LEFT JOIN LATERAL (
Select B.Column1,B.Column2,B.Fk1 from B Limit 1
) x ON X.Fk1 = A.PK
In this query you can not use normal join, due to limit clause. Lateral or Cross Apply can be used when there is not simple join condition.
There are more usages for lateral or cross apply but this is most common one I found.
In Visual Studio 2017, "TestContext" doesn't show the Output link into Test Explorer.
However, Trace.Writeline() shows the Output link.
There are several possible causes.
The other end has deliberately reset the connection, in a way which I will not document here. It is rare, and generally incorrect, for application software to do this, but it is not unknown for commercial software.
More commonly, it is caused by writing to a connection that the other end has already closed normally. In other words an application protocol error.
It can also be caused by closing a socket when there is unread data in the socket receive buffer.
In Windows, 'software caused connection abort', which is not the same as 'connection reset', is caused by network problems sending from your end. There's a Microsoft knowledge base article about this.
Tuples are fixed size in nature whereas lists are dynamic.
In other words, a tuple
is immutable whereas a list
is mutable.
in
operator to check if an element exists in the tuple.Tuples are faster than lists. If you're defining a constant set of values and all you're ever going to do with it is iterate through it, use a tuple instead of a list.
It makes your code safer if you “write-protect” data that does not need to be changed. Using a tuple instead of a list is like having an implied assert statement that this data is constant, and that special thought (and a specific function) is required to override that.
Some tuples can be used as dictionary keys (specifically, tuples that contain immutable values like strings, numbers, and other tuples). Lists can never be used as dictionary keys, because lists are not immutable.
Source: Dive into Python 3
git show <revhash>
Documentation here. Or if that doesn't work, try Google Code's GIT Documentation
Yes, it is possible:
git clone https://github.com/pitosalas/st3_packages Packages
You can specify the local root directory when using git clone.
<directory>
The name of a new directory to clone into.
The "humanish" part of the source repository is used if no directory is explicitly given (repo
for/path/to/repo.git
andfoo
forhost.xz:foo/.git
).
Cloning into an existing directory is only allowed if the directory is empty.
As Chris comments, you can then rename that top directory.
Git only cares about the .git
within said top folder, which you can get with various commands:
git rev-parse --show-toplevel git rev-parse --git-dir
FINDSTR has a color bug that I described and solved at https://superuser.com/questions/1535810/is-there-a-better-way-to-mitigate-this-obscure-color-bug-when-piping-to-findstr/1538802?noredirect=1#comment2339443_1538802
To summarize that thread, the bug is that if input is piped to FINDSTR within a parenthesized block of code, inline ANSI escape colorcodes stop working in commands executed later. An example of inline colorcodes is: echo %magenta%Alert: Something bad happened%yellow%
(where magenta and yellow are vars defined earlier in the .bat file as the corresponding ANSI escape colorcodes).
My initial solution was to call a do-nothing subroutine after the FINDSTR. Somehow the call or the return "resets" whatever needs to be reset.
Later I discovered another solution that presumably is more efficient: place the FINDSTR phrase within parentheses, as in the following example:
echo success | ( FINDSTR /R success )
Placing the FINDSTR phrase within a nested block of code appears to isolate FINDSTR's colorcode bug so it won't affect what's outside the nested block. Perhaps this technique will solve some other undesired FINDSTR side effects too.
Try to open Visual Studio as admin.
The following calculates the mouse position relation to the canvas element:
var example = document.getElementById('example');
example.onmousemove = function(e) {
var x = e.pageX - this.offsetLeft;
var y = e.pageY - this.offsetTop;
}
In this example, this
refers to the example
element, and e
is the onmousemove
event.
EDIT: this answer isn't quite right at the moment, refer to my other answer to see what I was attempting to do here. I'm trying to fix it up, but if you can offer assistance do so in the comments, thanks!
Using padding-right
will mitigate the sudden appearance of a scrollbar
As you can see from the dots, the text makes it to the same point in the page before wrapping, regardless of whether or not a scrollbar is present.
This is because when a scrollbar is introduced the padding hides behind it, so the scrollbar doesn't push on the text!
You can use tf.convert_to_tensor()
:
import tensorflow as tf
import numpy as np
data = [[1,2,3],[4,5,6]]
data_np = np.asarray(data, np.float32)
data_tf = tf.convert_to_tensor(data_np, np.float32)
sess = tf.InteractiveSession()
print(data_tf.eval())
sess.close()
Here's a link to the documentation for this method:
https://www.tensorflow.org/api_docs/python/tf/convert_to_tensor
I think in terms of keeping people happy during/ post switch over, one of things to get across early is just how private a local branch can be in Git, and how much freedom that gives them to make mistakes. Get them all to clone themselves a few private branches from the current code and then go wild in there, experimenting. Rename some files, check stuff in, merge things from another branch, rewind history, rebase one set of changes on top of another, and so on. Show how even their worst accidents locally have no consequences for their colleagues. What you want is a situation where developers feel safe, so they can learn faster (since Git has a steep learning curve that's important) and then eventually so that they're more effective as developers.
When you're trying to learn a centralised tool, obviously you will be worried about making some goof that causes problems for other users of the repository. The fear of embarrassment alone is enough to discourage people from experimenting. Even having a special "training" repository doesn't help, because inevitably developers will encounter a situation in the production system that they never saw during training, and so they're back to worrying.
But Git's distributed nature does away with this. You can try any experiment in a local branch, and if it goes horribly wrong, just throw the branch away and nobody needs to know. Since you can create a local branch of anything, you can replicate a problem you're seeing with the real live repository, yet have no danger of "breaking the build" or otherwise making a fool of yourself. You can check absolutely everything in, as soon as you've done it, no trying to batch work up into neat little packages. So not just the two major code changes you spent four hours on today, but also that build fix that you remembered half way through, and the spelling mistake in the documentation you spotted while explaining something to a colleague, and so on. And if the major changes are abandoned because the project is changing direction, you can cherry pick the build fix and the spelling mistake out of your branch and keep those with no hassle.
The awk solution is what I would use, but if you want to understand your problems with bash, here is a revised version of your script.
#!/bin/bash -vx
##config file with ip addresses like 10.10.10.1:80
file=config.txt
while read line ; do
##this line is not correct, should strip :port and store to ip var
ip=$( echo "$line" |cut -d\: -f1 )
ping $ip
done < ${file}
You could write your top line as
for line in $(cat $file) ; do ...
(but not recommended).
You needed command substitution $( ... )
to get the value assigned to $ip
reading lines from a file is usually considered more efficient with the while read line ... done < ${file}
pattern.
I hope this helps.
I assume you mean struct and not strict, but on a 32-bit system it'll be either 5 or 8 bytes, depending on if the compiler is padding the struct.