Different Python modules to read wav:
There is at least these following libraries to read wave audio files:
The most simple example:
This is a simple example with SoundFile:
import soundfile as sf
data, samplerate = sf.read('existing_file.wav')
Format of the output:
Warning, the data are not always in the same format, that depends on the library. For instance:
from scikits import audiolab
from scipy.io import wavfile
from sys import argv
for filepath in argv[1:]:
x, fs, nb_bits = audiolab.wavread(filepath)
print('Reading with scikits.audiolab.wavread:', x)
fs, x = wavfile.read(filepath)
print('Reading with scipy.io.wavfile.read:', x)
Output:
Reading with scikits.audiolab.wavread: [ 0. 0. 0. ..., -0.00097656 -0.00079346 -0.00097656]
Reading with scipy.io.wavfile.read: [ 0 0 0 ..., -32 -26 -32]
SoundFile and Audiolab return floats between -1 and 1 (as matab does, that is the convention for audio signals). Scipy and wave return integers, which you can convert to floats according to the number of bits of encoding, for example:
from scipy.io.wavfile import read as wavread
samplerate, x = wavread(audiofilename) # x is a numpy array of integers, representing the samples
# scale to -1.0 -- 1.0
if x.dtype == 'int16':
nb_bits = 16 # -> 16-bit wav files
elif x.dtype == 'int32':
nb_bits = 32 # -> 32-bit wav files
max_nb_bit = float(2 ** (nb_bits - 1))
samples = x / (max_nb_bit + 1) # samples is a numpy array of floats representing the samples
There are many articles about writing code to import an excel file, but this is a manual/shortcut version:
If you don't need to import your Excel file programmatically using code you can do it very quickly using the menu in SQL Management Studio.
The quickest way to get your Excel file into SQL is by using the import wizard:
The next window is 'Choose a Data Source', select Excel:
In the 'Data Source' dropdown list select Microsoft Excel (this option should appear automatically if you have excel installed).
Click the 'Browse' button to select the path to the Excel file you want to import.
On the 'Specify Table Copy or Query' window:
'Select Source Tables:' choose the worksheet(s) from your Excel file and specify a destination table for each worksheet. If you don't have a table yet the wizard will very kindly create a new table that matches all the columns from your spreadsheet. Click Next.
I had the same problem in a solution that had been upgraded to MVC 5 in Visual Studio 2015.
In the web.config file within the Views folder (not the root web.config), I updated the version number referred to in <configSections>
from 2.0.0.0
to 3.0.0.0
.
<configuration>
<configSections>
<sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
<section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
</sectionGroup>
</configSections>
To fix this in Dreamweaver CC 2018, I went to preferences, edit rule set - select JS, edit/apply changes, find "esnext" and changed the false setting to true. It worked for me after hours of research. Hope it helps others.
It took me some time to figure this out: My php-file was encoded in UTF-8. And the BOM prevented header location to work properly. In Notepad++ I set the file encoding to "UTF-8 without BOM" and the problem was gone.
You can prefix the size requirement with -
to left-justify:
sys.stdout.write("%-6s %-50s %-25s\n" % (code, name, industry))
Template argument deduction for class templates
[*this]{ std::cout << could << " be " << useful << '\n'; }
[[fallthrough]]
, [[nodiscard]]
, [[maybe_unused]]
attributes
using
in attributes to avoid having to repeat an attribute namespace.
Compilers are now required to ignore non-standard attributes they don't recognize.
Simple static_assert(expression);
with no string
no throw
unless throw()
, and throw()
is noexcept(true)
.
std::tie
with auto
const auto [it, inserted] = map.insert( {"foo", bar} );
it
and inserted
with deduced type from the pair
that map::insert
returns.std::array
s and relatively flat structsif (init; condition)
and switch (init; condition)
if (const auto [it, inserted] = map.insert( {"foo", bar} ); inserted)
if(decl)
to cases where decl
isn't convertible-to-bool sensibly.Generalizing range-based for loops
Fixed order-of-evaluation for (some) expressions with some modifications
.then
on future work.Forward progress guarantees (FPG) (also, FPGs for parallel algorithms)
u8'U', u8'T', u8'F', u8'8'
character literals (string already existed)
inherited constructors fixes to some corner cases (see P0136R0 for examples of behavior changes)
std::string
like reference-to-character-array or substringstring const&
again. Also can make parsing a bajillion times faster."hello world"sv
char_traits
std::byte
off more than they could chew.
std::invoke
std::apply
std::make_from_tuple
, std::apply
applied to object construction
is_invocable
, is_invocable_r
, invoke_result
result_of
is_invocable<Foo(Args...), R>
is "can you call Foo
with Args...
and get something compatible with R
", where R=void
is default.invoke_result<Foo, Args...>
is std::result_of_t<Foo(Args...)>
but apparently less confusing?[class.directory_iterator]
and [class.recursive_directory_iterator]
fstream
s can be opened with path
s, as well as with const path::value_type*
strings.
for_each_n
reduce
transform_reduce
exclusive_scan
inclusive_scan
transform_exclusive_scan
transform_inclusive_scan
Added for threading purposes, exposed even if you aren't using them threaded
atomic<T>
::is_always_lockfree
std::lock
pain when locking more than one mutex at a time.std
algorithms, and related machinery[func.searchers]
and [alg.search]
std::function
for allocatorsstd::sample
, sampling from a range?
try_emplace
and insert_or_assign
Splicing for map<>
, unordered_map<>
, set<>
, and unordered_set<>
non-const .data()
for string.
non-member std::size
, std::empty
, std::data
std::begin
/end
The emplace
family of functions now returns a reference to the created object.
unique_ptr<T[]>
fixes and other unique_ptr
tweaks.weak_from_this
and some fixed to shared from thisstd
datatype improvements:{}
construction of std::tuple
and other improvementsC++17 library is based on C11 instead of C99
Reserved std[0-9]+
for future standard libraries
std
implementations exposedstd::clamp()
std::clamp( a, b, c ) == std::max( b, std::min( a, c ) )
roughlygcd
and lcm
std::uncaught_exceptions
std::as_const
std::bool_constant
_v
template variablesstd::void_t<T>
std::owner_less<void>
std::less<void>
, but for smart pointers to sort based on contentsstd::chrono
polishstd::conjunction
, std::disjunction
, std::negation
exposedstd::not_fn
std
std::less
.<codecvt>
memory_order_consume
result_of
, replaced with invoke_result
shared_ptr::unique
, it isn't very threadsafeIsocpp.org has has an independent list of changes since C++14; it has been partly pillaged.
Naturally TS work continues in parallel, so there are some TS that are not-quite-ripe that will have to wait for the next iteration. The target for the next iteration is C++20 as previously planned, not C++19 as some rumors implied. C++1O has been avoided.
Initial list taken from this reddit post and this reddit post, with links added via googling or from the above isocpp.org page.
Additional entries pillaged from SD-6 feature-test list.
clang's feature list and library feature list are next to be pillaged. This doesn't seem to be reliable, as it is C++1z, not C++17.
these slides had some features missing elsewhere.
While "what was removed" was not asked, here is a short list of a few things ((mostly?) previous deprecated) that are removed in C++17 from C++:
register
, keyword reserved for future usebool b; ++b;
<functional>
stuff, random_shuffle
std::function
There were rewordings. I am unsure if these have any impact on code, or if they are just cleanups in the standard:
P0505R0 (constexpr chrono)
P0418R2 (atomic tweaks)
P0512R0 (template argument deduction tweaks)
P0490R0 (structured binding tweaks)
P0513R0 (changes to std::hash
)
P0502R0 (parallel exceptions)
P0509R1 (updating restrictions on exception handling)
P0012R1 (make exception specifications be part of the type system)
P0510R0 (restrictions on variants)
P0504R0 (tags for optional/variant/any)
P0497R0 (shared ptr tweaks)
P0508R0 (structured bindings node handles)
P0521R0 (shared pointer use count and unique changes?)
https://isocpp.org/files/papers/p0636r0.html
You do not need to use moment-timezone for this. The main moment.js library has full functionality for working with UTC and the local time zone.
var testDateUtc = moment.utc("2015-01-30 10:00:00");
var localDate = moment(testDateUtc).local();
From there you can use any of the functions you might expect:
var s = localDate.format("YYYY-MM-DD HH:mm:ss");
var d = localDate.toDate();
// etc...
Note that by passing testDateUtc
, which is a moment
object, back into the moment()
constructor, it creates a clone. Otherwise, when you called .local()
, it would also change the testDateUtc
value, instead of just the localDate
value. Moments are mutable.
Also note that if your original input contains a time zone offset such as +00:00
or Z
, then you can just parse it directly with moment
. You don't need to use .utc
or .local
. For example:
var localDate = moment("2015-01-30T10:00:00Z");
You can use the Mock.call_args_list
attribute to compare parameters to previous method calls. That in conjunction with Mock.call_count
attribute should give you full control.
This is the only thing that works on all current browsers:
<script>
function goBack() {
history.go(-1);
}
</script>
<button onclick="goBack()">Go Back</button>
I use the utility below to cleanup after my integration test run.
It uses the latest AdminZkClient
api. The older api has been deprecated.
import javax.inject.Inject
import kafka.zk.{AdminZkClient, KafkaZkClient}
import org.apache.kafka.common.utils.Time
class ZookeeperUtils @Inject() (config: AppConfig) {
val testTopic = "users_1"
val zkHost = config.KafkaConfig.zkHost
val sessionTimeoutMs = 10 * 1000
val connectionTimeoutMs = 60 * 1000
val isSecure = false
val maxInFlightRequests = 10
val time: Time = Time.SYSTEM
def cleanupTopic(config: AppConfig) = {
val zkClient = KafkaZkClient.apply(zkHost, isSecure, sessionTimeoutMs, connectionTimeoutMs, maxInFlightRequests, time)
val zkUtils = new AdminZkClient(zkClient)
val pp = new Properties()
pp.setProperty("delete.retention.ms", "10")
pp.setProperty("file.delete.delay.ms", "1000")
zkUtils.changeTopicConfig(testTopic , pp)
// zkUtils.deleteTopic(testTopic)
println("Waiting for topic to be purged. Then reset to retain records for the run")
Thread.sleep(60000L)
val resetProps = new Properties()
resetProps.setProperty("delete.retention.ms", "3000000")
resetProps.setProperty("file.delete.delay.ms", "4000000")
zkUtils.changeTopicConfig(testTopic , resetProps)
}
}
There is an option delete topic. But, it marks the topic for deletion. Zookeeper later deletes the topic. Since this can be unpredictably long, I prefer the retention.ms approach
try to replace the text/javascript to text/html then save the note and reload browser then bring it back to text/javascript.. I don't know but for unknown reason this one works with me.. I am searching and copy-pasting and I just accidentally undo what I am typing then boom kablooey it worked 0.O by the way I am just noob.. sorry I just thought it could help though..
Somebody added this to a View.
@Scripts.Render("~/bundles/jqueryval")
Then they added the BundleConfig.cs
file in the App_Start
Folder.
In the RegisterBundles
Method they had:
bundles.Add(new ScriptBundle("~/bundles/jquery").Include("~/Scripts/jquery-{version}.js"));
However, they forgot to finish wiring this up in the Global.asax.cs
File.
To Fix, all I had to do was add this to the Application_Start
Method in Global.asax.cs
:
RouteConfig.RegisterRoutes(RouteTable.Routes);
Note: I think the ordering/placement of this Line in the Application_Start
Method matters,
so please keep that in mind.
I placed mine immediately after ViewEngines
.
The right way to do this is simple:
def rate(T):
if (T > 200):
return 200*exp(-T)
else:
return 400*exp(-T)
There is absolutely no advantage to using lambda
here. The only thing lambda
is good for is allowing you to create anonymous functions and use them in an expression (as opposed to a statement). If you immediately assign the lambda
to a variable, it's no longer anonymous, and it's used in a statement, so you're just making your code less readable for no reason.
The rate
function defined this way can be stored in an array, passed around, called, etc. in exactly the same way a lambda function could. It'll be exactly the same (except a bit easier to debug, introspect, etc.).
From a comment:
Well the function needed to fit in one line, which i didn't think you could do with a named function?
I can't imagine any good reason why the function would ever need to fit in one line. But sure, you can do that with a named function. Try this in your interpreter:
>>> def foo(x): return x + 1
Also these functions are stored as strings which are then evaluated using "eval" which i wasn't sure how to do with regular functions.
Again, while it's hard to be 100% sure without any clue as to why why you're doing this, I'm at least 99% sure that you have no reason or a bad reason for this. Almost any time you think you want to pass Python functions around as strings and call eval
so you can use them, you actually just want to pass Python functions around as functions and use them as functions.
But on the off chance that this really is what you need here: Just use exec
instead of eval
.
You didn't mention which version of Python you're using. In 3.x, the exec
function has the exact same signature as the eval
function:
exec(my_function_string, my_globals, my_locals)
In 2.7, exec
is a statement, not a function—but you can still write it in the same syntax as in 3.x (as long as you don't try to assign the return value to anything) and it works.
In earlier 2.x (before 2.6, I think?) you have to do it like this instead:
exec my_function_string in my_globals, my_locals
For reference using the [EnableCors()]
approach will not work if you intercept the Message Pipeline using a DelegatingHandler
. In my case was checking for an Authorization
header in the request and handling it accordingly before the routing was even invoked, which meant my request was getting processed earlier in the pipeline so the [EnableCors()]
had no effect.
In the end found an example CrossDomainHandler
class (credit to shaunxu for the Gist) which handles the CORS for me in the pipeline and to use it is as simple as adding another message handler to the pipeline.
public class CrossDomainHandler : DelegatingHandler
{
const string Origin = "Origin";
const string AccessControlRequestMethod = "Access-Control-Request-Method";
const string AccessControlRequestHeaders = "Access-Control-Request-Headers";
const string AccessControlAllowOrigin = "Access-Control-Allow-Origin";
const string AccessControlAllowMethods = "Access-Control-Allow-Methods";
const string AccessControlAllowHeaders = "Access-Control-Allow-Headers";
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
bool isCorsRequest = request.Headers.Contains(Origin);
bool isPreflightRequest = request.Method == HttpMethod.Options;
if (isCorsRequest)
{
if (isPreflightRequest)
{
return Task.Factory.StartNew(() =>
{
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
response.Headers.Add(AccessControlAllowOrigin, request.Headers.GetValues(Origin).First());
string accessControlRequestMethod = request.Headers.GetValues(AccessControlRequestMethod).FirstOrDefault();
if (accessControlRequestMethod != null)
{
response.Headers.Add(AccessControlAllowMethods, accessControlRequestMethod);
}
string requestedHeaders = string.Join(", ", request.Headers.GetValues(AccessControlRequestHeaders));
if (!string.IsNullOrEmpty(requestedHeaders))
{
response.Headers.Add(AccessControlAllowHeaders, requestedHeaders);
}
return response;
}, cancellationToken);
}
else
{
return base.SendAsync(request, cancellationToken).ContinueWith(t =>
{
HttpResponseMessage resp = t.Result;
resp.Headers.Add(AccessControlAllowOrigin, request.Headers.GetValues(Origin).First());
return resp;
});
}
}
else
{
return base.SendAsync(request, cancellationToken);
}
}
}
To use it add it to the list of registered message handlers
config.MessageHandlers.Add(new CrossDomainHandler());
Any preflight requests by the Browser are handled and passed on, meaning I didn't need to implement an [HttpOptions]
IHttpActionResult
method on the Controller.
If you are using a pycharm IDE for development and you already have added Git with it. you can directly delete remote branch from pycharm. From toolbar VCS-->Git-->Branches-->Select branch-->and Delete. It will delete it from remote git server.
Although it seems that in most cases it's enough to have onAttach(Context)
, there are some phones (i.e: Xiaomi Redme Note 2) where it's not being called, thus it causes NullPointerExceptions. So to be on the safe side I suggest to leave the deprecated method as well:
// onAttach(Activity) is necessary in some Xiaomi phones
@SuppressWarnings("deprecation")
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
_onAttach(activity);
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
_onAttach(context);
}
private void _onAttach(Context context) {
// do your real stuff here
}
IntelliJ IDEA detects errors and warnings in the current file on the fly (unless Power Save Mode is activated in the File
menu).
Errors in other files and in the project view will be shown after Build
| Make
and listed in the Messages tool window.
For Bazel users: Project errors will show on Bazel Problems tool window after running Compile Project
(Ctrl/Cmd+F9)
To navigate between errors use Navigate
| Next Highlighted Error
(F2) / Previous Highlighted Error
(Shift+F2).
Error Stripe Mark color can be changed here:
putExtra() : This method sends the data to another activity and in parameter, we have to pass key-value pair.
Syntax: intent.putExtra("key", value);
Eg: intent.putExtra("full_name", "Vishnu Sivan");
Intent intent=getIntent()
: It gets the Intent from the previous activity.
fullname = intent.getStringExtra(“full_name”)
: This line gets the string form previous activity and in parameter, we have to pass the key which we have mentioned in previous activity.
Sample Code:
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.putExtra("firstName", "Vishnu");
intent.putExtra("lastName", "Sivan");
startActivity(intent);
This can be done just using Copy-Item. No need to use Get-Childitem. I think you are just overthinking it.
Copy-Item -Path C:\MyFolder -Destination \\Server\MyFolder -recurse -Force
I just tested it and it worked for me.
edit: included suggestion from the comments
# Add wildcard to source folder to ensure consistent behavior
Copy-Item -Path $sourceFolder\* -Destination $targetFolder -Recurse
If you want to both OnTouch
and OnClick
listener to parent and child view both, please use below trick:
User ScrollView as a Parent view and inside that placed your child view inside Relative/LinearLayout.
Make Parent ScrollView android:fillViewport="true"
so View not be scrolled.
Then set OnTouch
listener to parent and OnClick
listener to Child views.
And enjoy both listener callbacks.
The -p
flag of netstat
gives you PID of the process:
netstat -l -p
Edit: The command that is needed to get PIDs of socket users in FreeBSD is sockstat
.
As we worked out during the discussion with @Cyclone, the line that does the job is:
sockstat -4 -l | grep :80 | awk '{print $3}' | head -1
You are trying to call DeckOfCards::shuffle
with a deckOfCards
parameter:
deckOfCards cardDeck; // create DeckOfCards object
cardDeck.shuffle(cardDeck); // shuffle the cards in the deck
But the method takes a vector<Card>&
:
void deckOfCards::shuffle(vector<Card>& deck)
The compiler error messages are quite clear on this. I'll paraphrase the compiler as it talks to you.
Error:
[Error] no matching function for call to 'deckOfCards::shuffle(deckOfCards&)'
Paraphrased:
Hey, pal. You're trying to call a function called
shuffle
which apparently takes a single parameter of type reference-to-deckOfCards
, but there is no such function.
Error:
[Note] candidate is:
In file included from main.cpp
[Note] void deckOfCards::shuffle(std::vector&)
Paraphrased:
I mean, maybe you meant this other function called
shuffle
, but that one takes a reference-tovector<something>
.
Error:
[Note] no known conversion for argument 1 from 'deckOfCards' to 'std::vector&'
Which I'd be happy to call if I knew how to convert from a
deckOfCards
to avector
; but I don't. So I won't.
I think I also have this problem, I was trying to make calendar visible after clicking a button but the page keeps refreshing after clicking the button
MaintainScrollPositionOnPostBack="true"
This actually answered my problem.
I cant vote or comment, I just joined SO today
If you haven't made a backup, you are pretty much fudged.
Posting Ron E answer for grant privileges on all tables as it might be useful to others.
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO jerry;
I was setting up cors.support.credentials to true along with cors.allowed.origins as *, which won't work.
When cors.allowed.origins is * , then cors.support.credentials should be false (default value or shouldn't be set explicitly).
Depending on the length of the wanted loop, maybe even a more "template-driven" solution:
<ul>
<li *ngFor="let index of [0,1,2,3,4,5]">
{{ index }}
</li>
</ul>
you can also use this code
public static double roundToDecimals(double d, int c)
{
int temp = (int)(d * Math.pow(10 , c));
return ((double)temp)/Math.pow(10 , c);
}
It gives you control of how many numbers after the point are needed.
d = number to round;
c = number of decimal places
think it will be helpful
You can use following class as service class to run your application in background
import java.util.Timer;
import java.util.TimerTask;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service {
private GPSTracker gpsTracker;
private Handler handler= new Handler();
private Timer timer = new Timer();
private Distance pastDistance = new Distance();
private Distance currentDistance = new Distance();
public static double DISTANCE;
boolean flag = true ;
private double totalDistance ;
@Override
@Deprecated
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
gpsTracker = new GPSTracker(HomeFragment.HOMECONTEXT);
TimerTask timerTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
@Override
public void run() {
if(flag){
pastDistance.setLatitude(gpsTracker.getLocation().getLatitude());
pastDistance.setLongitude(gpsTracker.getLocation().getLongitude());
flag = false;
}else{
currentDistance.setLatitude(gpsTracker.getLocation().getLatitude());
currentDistance.setLongitude(gpsTracker.getLocation().getLongitude());
flag = comapre_LatitudeLongitude();
}
Toast.makeText(HomeFragment.HOMECONTEXT, "latitude:"+gpsTracker.getLocation().getLatitude(), 4000).show();
}
});
}
};
timer.schedule(timerTask,0, 5000);
}
private double distance(double lat1, double lon1, double lat2, double lon2) {
double theta = lon1 - lon2;
double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(deg2rad(theta));
dist = Math.acos(dist);
dist = rad2deg(dist);
dist = dist * 60 * 1.1515;
return (dist);
}
private double deg2rad(double deg) {
return (deg * Math.PI / 180.0);
}
private double rad2deg(double rad) {
return (rad * 180.0 / Math.PI);
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
super.onDestroy();
System.out.println("--------------------------------onDestroy -stop service ");
timer.cancel();
DISTANCE = totalDistance ;
}
public boolean comapre_LatitudeLongitude(){
if(pastDistance.getLatitude() == currentDistance.getLatitude() && pastDistance.getLongitude() == currentDistance.getLongitude()){
return false;
}else{
final double distance = distance(pastDistance.getLatitude(),pastDistance.getLongitude(),currentDistance.getLatitude(),currentDistance.getLongitude());
System.out.println("Distance in mile :"+distance);
handler.post(new Runnable() {
@Override
public void run() {
float kilometer=1.609344f;
totalDistance = totalDistance + distance * kilometer;
DISTANCE = totalDistance;
//Toast.makeText(HomeFragment.HOMECONTEXT, "distance in km:"+DISTANCE, 4000).show();
}
});
return true;
}
}
}
Add One another class to get location
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
public class GPSTracker implements LocationListener {
private final Context mContext;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location = null;
double latitude;
double longitude;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
protected LocationManager locationManager;
private Location m_Location;
public GPSTracker(Context context) {
this.mContext = context;
m_Location = getLocation();
System.out.println("location Latitude:"+m_Location.getLatitude());
System.out.println("location Longitude:"+m_Location.getLongitude());
System.out.println("getLocation():"+getLocation());
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(Context.LOCATION_SERVICE);
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
}
else {
this.canGetLocation = true;
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
public void stopUsingGPS() {
if (locationManager != null) {
locationManager.removeUpdates(GPSTracker.this);
}
}
public double getLatitude() {
if (location != null) {
latitude = location.getLatitude();
}
return latitude;
}
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
return longitude;
}
public boolean canGetLocation() {
return this.canGetLocation;
}
@Override
public void onLocationChanged(Location arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
}
// --------------Distance.java
public class Distance {
private double latitude ;
private double longitude;
public double getLatitude() {
return latitude;
}
public void setLatitude(double latitude) {
this.latitude = latitude;
}
public double getLongitude() {
return longitude;
}
public void setLongitude(double longitude) {
this.longitude = longitude;
}
}
I had a similar task to do, but it contained some aspects that were not sufficiently covered by the other answers here:
I did not try fast-export and hg-fast-export, since they require that you have Python and some Mercurial Python modules on your machine, which I didn't have.
I did try hg-init with TortoiseHG, and this answer gave me a good start. But it looked like it only converts the current branch, not all at once (*). So I read the hg-init docs and this blog post and added
[git]
branch_bookmark_suffix=_bookmark
to my mercurial.ini, and did
hg bookmarks -r default master
hg bookmarks -r my_branch my_branch_bookmark
hg gexport
(Repeat the 2nd line for every branch you want to convert, and repeat it again if you should happen to do another commit before executing the 3rd line). This creates a folder git
within .hg
, which turns out to be a bare Git repo with all the exported branches. I could clone this repo and had a working copy as desired.
Or almost...
Running
git status
on my working copy showed all files with non-ASCII characters in their names as untracked files. So I continued researching and followed this advice:
git rm -rf --cached \*
git add --all
git commit
And finally the repo was ready to be pushed up to Bitbucket :-)
I also tried the Github importer as mentioned in this answer. I used Bitbucket as the source system, and Github did quite a good job, i.e. it converted all branches automatically. However, it showed '?'-characters for all non-ASCII characters in my commit messages (Web-UI and locally) and filenames (Web-UI only), and while I could fix the filenames as described above, I had no idea what to do with the commit messages, and so I'd prefer the hg-init approach. Without the encoding issue the Github importer would have been a perfect and fast solution (as long as you have a paid Github account or can tolerate that your repo is public for as long as it takes to pull it from Github to your local machine).
(*) So it looked like before I discovered that I have to bookmark all the branches I want to export. If you do and push to a bare (!) repo, like the linked answer says, you get all the branches.
Walk of shame:
The connection string was pointing at the live database. The error message was completely accurate - the stored procedure was only present in the dev DB. Thanks to all who provided excellent answers, and my apologies for wasting your time.
May be helpful... :)
$(document).ready(function() {
$('#buutonId').on('click', function() {
$('#modalId').modal('open');
});
});
I tried this and dont see any way of doing it.
here is my approach for it.
EXEC sp_rename 'Employee', 'Employee1'
-- Original table name is EmployeeINSERT INTO TABLE2 SELECT * FROM TABLE1
.
-- Insert into Employee select Name, Company from Employee1DROP table Employee1
.If you are trying to install an apk directly from Google Drive, just restarting the device solved the issue for me.
.my_btn{
font-family:Arial;
font-size:10pt;
font-weight:normal;
height:30px;
line-height:30px;
width:98px;
border:0px;
background-image:url('../Images/menu_image.png');
cursor:pointer;
}
<asp:Button ID="clickme" runat="server" Text="Click" CssClass="my_btn" />
I solved the issue by removing "type": "module"
field from package.json
.
On Windows I use this code:
void * G_pPointer = NULL;
const char * G_szPointerName = NULL;
void CheckPointerIternal()
{
char cTest = *((char *)G_pPointer);
}
bool CheckPointerIternalExt()
{
bool bRet = false;
__try
{
CheckPointerIternal();
bRet = true;
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
}
return bRet;
}
void CheckPointer(void * A_pPointer, const char * A_szPointerName)
{
G_pPointer = A_pPointer;
G_szPointerName = A_szPointerName;
if (!CheckPointerIternalExt())
throw std::runtime_error("Invalid pointer " + std::string(G_szPointerName) + "!");
}
Usage:
unsigned long * pTest = (unsigned long *) 0x12345;
CheckPointer(pTest, "pTest"); //throws exception
I had some problems with FragmentStatePagerAdapter
.
After removing an item:
After lots of experiments, I came up with the following solution.
public class SomeAdapter extends FragmentStatePagerAdapter {
private List<Item> items = new ArrayList<Item>();
private boolean removing;
@Override
public Fragment getItem(int position) {
ItemFragment fragment = new ItemFragment();
Bundle args = new Bundle();
// use items.get(position) to configure fragment
fragment.setArguments(args);
return fragment;
}
@Override
public int getCount() {
return items.size();
}
@Override
public int getItemPosition(Object object) {
if (removing) {
return PagerAdapter.POSITION_NONE;
}
Item item = getItemOfFragment(object);
int index = items.indexOf(item);
if (index == -1) {
return POSITION_NONE;
} else {
return index;
}
}
public void addItem(Item item) {
items.add(item);
notifyDataSetChanged();
}
public void removeItem(int position) {
items.remove(position);
removing = true;
notifyDataSetChanged();
removing = false;
}
}
This solution only uses a hack in case of removing an item. Otherwise (e.g. when adding an item) it retains the cleanliness and performance of an original code.
Of course, from the outside of the adapter, you call only addItem/removeItem, no need to call notifyDataSetChanged().
I don't know is there any method in Python API.But you can use this simple code to add Salt-and-Pepper noise to an image.
import numpy as np
import random
import cv2
def sp_noise(image,prob):
'''
Add salt and pepper noise to image
prob: Probability of the noise
'''
output = np.zeros(image.shape,np.uint8)
thres = 1 - prob
for i in range(image.shape[0]):
for j in range(image.shape[1]):
rdn = random.random()
if rdn < prob:
output[i][j] = 0
elif rdn > thres:
output[i][j] = 255
else:
output[i][j] = image[i][j]
return output
image = cv2.imread('image.jpg',0) # Only for grayscale image
noise_img = sp_noise(image,0.05)
cv2.imwrite('sp_noise.jpg', noise_img)
The functionality of creating SQL Agent Jobs is not available in SQL Server Express Edition. An alternative is to execute a batch file that executes a SQL script using Windows Task Scheduler.
In order to do this first create a batch file named sqljob.bat
sqlcmd -S servername -U username -P password -i <path of sqljob.sql>
Replace the servername
, username
, password
and path
with yours.
Then create the SQL Script file named sqljob.sql
USE [databasename]
--T-SQL commands go here
GO
Replace the [databasename]
with your database name. The USE
and GO
is necessary when you write the SQL script.
sqlcmd
is a command-line utility to execute SQL scripts. After creating these two files execute the batch file using Windows Task Scheduler.
NB: An almost same answer was posted for this question before. But I felt it was incomplete as it didn't specify about login information using sqlcmd
.
class DuplicateMap<K, V>
{
enum MapType
{
Hash,LinkedHash
}
int HashCode = 0;
Map<Key<K>,V> map = null;
DuplicateMap()
{
map = new HashMap<Key<K>,V>();
}
DuplicateMap( MapType maptype )
{
if ( maptype == MapType.Hash ) {
map = new HashMap<Key<K>,V>();
}
else if ( maptype == MapType.LinkedHash ) {
map = new LinkedHashMap<Key<K>,V>();
}
else
map = new HashMap<Key<K>,V>();
}
V put( K key, V value )
{
return map.put( new Key<K>( key , HashCode++ ), value );
}
void putAll( Map<K, V> map1 )
{
Map<Key<K>,V> map2 = new LinkedHashMap<Key<K>,V>();
for ( Entry<K, V> entry : map1.entrySet() ) {
map2.put( new Key<K>( entry.getKey() , HashCode++ ), entry.getValue());
}
map.putAll(map2);
}
Set<Entry<K, V>> entrySet()
{
Set<Entry<K, V>> entry = new LinkedHashSet<Map.Entry<K,V>>();
for ( final Entry<Key<K>, V> entry1 : map.entrySet() ) {
entry.add( new Entry<K, V>(){
private K Key = entry1.getKey().Key();
private V Value = entry1.getValue();
@Override
public K getKey() {
return Key;
}
@Override
public V getValue() {
return Value;
}
@Override
public V setValue(V value) {
return null;
}});
}
return entry;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("{");
boolean FirstIteration = true;
for ( Entry<K, V> entry : entrySet() ) {
builder.append( ( (FirstIteration)? "" : "," ) + ((entry.getKey()==null) ? null :entry.getKey().toString() ) + "=" + ((entry.getValue()==null) ? null :entry.getValue().toString() ) );
FirstIteration = false;
}
builder.append("}");
return builder.toString();
}
class Key<K1>
{
K1 Key;
int HashCode;
public Key(K1 key, int hashCode) {
super();
Key = key;
HashCode = hashCode;
}
public K1 Key() {
return Key;
}
@Override
public String toString() {
return Key.toString() ;
}
@Override
public int hashCode() {
return HashCode;
}
}
If you did have installed Grunt package by running npm install -g grunt
and it still say's No command 'grunt' found
or grunt: command not found
, a quick and dirty way to get this working is linking node binaries to your $PATH manually.
On MacOSX/Linux you can add this line to your ~/.bash_profile
or ~/.bashrc
file.
PATH=$PATH:/usr/local/Cellar/node/HEAD/bin # Add NPM binaries
You probably should replace /usr/local/Cellar/node/HEAD/bin
by the path where your node binaries could be found.
If this is quick and dirty to me, it's because everything should work without doing this, but for an unknown reason, a link seem broken. As nobody on IRC could tell me why this happened, I found my own way to make it (grunt) work.
PS: This should help you make grunt works, this answer is not jquery-ui related.
Update 02/2013 : You should take a look at @tom-p's answer which explains better what is going on. Tom gives us the real solution instead of hacking your bashrc file : both should work, but you should try installing grunt-cli
first.
As Flavius Stef's answer, you can use intval()
to make sure all id
are int values:
$ids = join(',', array_map('intval', $galleries));
$sql = "SELECT * FROM galleries WHERE id IN ($ids)";
I think using UPDATE ... WHERE
as explained here and here is a lean approach
Project.update(
{ title: 'a very different title no' } /* set attributes' value */,
{ where: { _id : 1 }} /* where criteria */
).then(function(affectedRows) {
Project.findAll().then(function(Projects) {
console.log(Projects)
})
Another important difference is that Hashtable is thread safe. Hashtable has built-in multiple reader/single writer (MR/SW) thread safety which means Hashtable allows ONE writer together with multiple readers without locking.
In the case of Dictionary there is no thread safety; if you need thread safety you must implement your own synchronization.
To elaborate further:
Hashtable provides some thread-safety through the
Synchronized
property, which returns a thread-safe wrapper around the collection. The wrapper works by locking the entire collection on every add or remove operation. Therefore, each thread that is attempting to access the collection must wait for its turn to take the one lock. This is not scalable and can cause significant performance degradation for large collections. Also, the design is not completely protected from race conditions.The .NET Framework 2.0 collection classes like
List<T>, Dictionary<TKey, TValue>
, etc. do not provide any thread synchronization; user code must provide all synchronization when items are added or removed on multiple threads concurrently
If you need type safety as well thread safety, use concurrent collections classes in the .NET Framework. Further reading here.
An additional difference is that when we add the multiple entries in Dictionary, the order in which the entries are added is maintained. When we retrieve the items from Dictionary we will get the records in the same order we have inserted them. Whereas Hashtable doesn't preserve the insertion order.
Directly changing eclipse file is not a good idea, no matter facet or ini, unless it could be changed in eclipse. Had the same problem, with jdk1.8 installed. Change it to jdk 1.7.
Besides, according to https://wiki.eclipse.org/Eclipse/Installation, both LUNA and MARS need 1.7. So just ensure you have it installed.
If you use bash, then the terminal history is saved in a file called .bash_history. Delete it, and history will be gone.
However, for MySQL the better approach is not to enter the password in the command line. If you just specify the -p option, without a value, then you will be prompted for the password and it won't be logged.
Another option, if you don't want to enter your password every time, is to store it in a my.cnf file. Create a file named ~/.my.cnf with something like:
[client]
user = <username>
password = <password>
Make sure to change the file permissions so that only you can read the file.
Of course, this way your password is still saved in a plaintext file in your home directory, just like it was previously saved in .bash_history.
To the people complaining about the noise when doing git diff:
git diff -- . ':(exclude)*package-lock.json' -- . ':(exclude)*yarn.lock'
What I did was use an alias:
alias gd="git diff --ignore-all-space --ignore-space-at-eol --ignore-space-change --ignore-blank-lines -- . ':(exclude)*package-lock.json' -- . ':(exclude)*yarn.lock'"
To ignore package-lock.json in diffs for the entire repository (everyone using it), you can add this to .gitattributes
:
package-lock.json binary
yarn.lock binary
This will result in diffs that show "Binary files a/package-lock.json and b/package-lock.json differ whenever the package lock file was changed. Additionally, some Git services (notably GitLab, but not GitHub) will also exclude these files (no more 10k lines changed!) from the diffs when viewing online when doing this.
You can use this example
formatPrice(value) {
return value.toString().replace(/(\d)(?=(\d{3})+(?!\d))/g, '$1,');
},
I had to uninstall my anti virus! Before uninstalling I clicked on the option where it said to disable auto-protect for 15 min. I also clicked on another option that supposibly disabled the anti-virus. That still was blocking my server! I don't understand why Norton makes it so hard to literally stop doing everything it's doing. I know I could had solve it by adding an exception to the firewall but Norton was taking care of windows firewall as well.
Alternatively, just GROUP BY
the hour and day:
SELECT CAST(Startdate as DATE) as 'StartDate',
CAST(DATEPART(Hour, StartDate) as varchar) + ':00' as 'Hour',
COUNT(*) as 'Ct'
FROM #Events
GROUP BY CAST(Startdate as DATE), DATEPART(Hour, StartDate)
ORDER BY CAST(Startdate as DATE) ASC
output:
StartDate Hour Ct
2007-01-01 0:00 3
2007-01-02 5:00 2
2007-01-03 4:00 1
2007-01-07 3:00 1
I too faced the same problem. But I noticed that my directory was empty when this error occurred. When I created a sample file and pushed again it worked. So please make sure before pushing that your folder is not empty!!
You could also consider going parallel, especially if you don't care about the sequence and more about getting something done for each item:
SomeIEnumerable<T>.AsParallel().ForAll( Action<T> / Delegate / Lambda )
For example:
var numbers = new[] { 1, 2, 3, 4, 5 };
numbers.AsParallel().ForAll( Console.WriteLine );
HTH.
Because you're using multiple. Despite it still technically being a dropdown, it doesn't look or act like a standard dropdown. Rather, it populates a list box and lets them select multiple options.
Size determines how many options appear before they have to click down or up to see the other options.
I have a feeling what you want to achieve is only going to be possible with a JavaScript plugin.
Some examples:
jQuery multiselect drop down menu
http://labs.abeautifulsite.net/archived/jquery-multiSelect/demo/
alter table your_table
alter column LoginDate datetime;
use getBoundingClientRect
if $el
is the actual DOM object:
var top = $el.getBoundingClientRect().top;
Fiddle will show that this will get the same value that jquery's offset top will give you
Edit: as mentioned in comments this does not account for scrolled content, below is the code that jQuery uses
https://github.com/jquery/jquery/blob/master/src/offset.js (5/13/2015)
offset: function( options ) {
//...
var docElem, win, rect, doc,
elem = this[ 0 ];
if ( !elem ) {
return;
}
rect = elem.getBoundingClientRect();
// Make sure element is not hidden (display: none) or disconnected
if ( rect.width || rect.height || elem.getClientRects().length ) {
doc = elem.ownerDocument;
win = getWindow( doc );
docElem = doc.documentElement;
return {
top: rect.top + win.pageYOffset - docElem.clientTop,
left: rect.left + win.pageXOffset - docElem.clientLeft
};
}
}
Path.GetFileName( Request.Url.AbsolutePath )
First off you can't have just a number for your id unless you are using the HTML5 DOCTYPE. Secondly, you need to either remove the # in each id or replace it with this:
$container.cycle(id.replace('#',''));
Short answer:
Date in = new Date();
LocalDateTime ldt = LocalDateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
Date out = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
Explanation:
(based on this question about LocalDate
)
Despite its name, java.util.Date
represents an instant on the time-line, not a "date". The actual data stored within the object is a long
count of milliseconds since 1970-01-01T00:00Z (midnight at the start of 1970 GMT/UTC).
The equivalent class to java.util.Date
in JSR-310 is Instant
, thus there are convenient methods to provide the conversion to and fro:
Date input = new Date();
Instant instant = input.toInstant();
Date output = Date.from(instant);
A java.util.Date
instance has no concept of time-zone. This might seem strange if you call toString()
on a java.util.Date
, because the toString
is relative to a time-zone. However that method actually uses Java's default time-zone on the fly to provide the string. The time-zone is not part of the actual state of java.util.Date
.
An Instant
also does not contain any information about the time-zone. Thus, to convert from an Instant
to a local date-time it is necessary to specify a time-zone. This might be the default zone - ZoneId.systemDefault()
- or it might be a time-zone that your application controls, such as a time-zone from user preferences. LocalDateTime
has a convenient factory method that takes both the instant and time-zone:
Date in = new Date();
LocalDateTime ldt = LocalDateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
In reverse, the LocalDateTime
the time-zone is specified by calling the atZone(ZoneId)
method. The ZonedDateTime
can then be converted directly to an Instant
:
LocalDateTime ldt = ...
ZonedDateTime zdt = ldt.atZone(ZoneId.systemDefault());
Date output = Date.from(zdt.toInstant());
Note that the conversion from LocalDateTime
to ZonedDateTime
has the potential to introduce unexpected behaviour. This is because not every local date-time exists due to Daylight Saving Time. In autumn/fall, there is an overlap in the local time-line where the same local date-time occurs twice. In spring, there is a gap, where an hour disappears. See the Javadoc of atZone(ZoneId)
for more the definition of what the conversion will do.
Summary, if you round-trip a java.util.Date
to a LocalDateTime
and back to a java.util.Date
you may end up with a different instant due to Daylight Saving Time.
Additional info: There is another difference that will affect very old dates. java.util.Date
uses a calendar that changes at October 15, 1582, with dates before that using the Julian calendar instead of the Gregorian one. By contrast, java.time.*
uses the ISO calendar system (equivalent to the Gregorian) for all time. In most use cases, the ISO calendar system is what you want, but you may see odd effects when comparing dates before year 1582.
There is now a nice Jest plugin for this called jest-watch-typeahead
it makes this process much simpler.
DOM methods, as outlined by Tom.
innerHTML, as mentioned by iHunger.
DOM methods are highly preferable to strings for setting attributes and content. If you ever find yourself writing innerHTML= '<a href="'+path+'">'+text+'</a>'
you're actually creating new cross-site-scripting security holes on the client side, which is a bit sad if you've spent any time securing your server-side.
DOM methods are traditionally described as ‘slow’ compared to innerHTML. But this isn't really the whole story. What is slow is inserting a lot of child nodes:
for (var i= 0; i<1000; i++)
div.parentNode.insertBefore(document.createElement('div'), div);
This translates to a load of work for the DOM finding the right place in its nodelist to insert the element, moving the other child nodes up, inserting the new node, updating the pointers, and so on.
Setting an existing attribute's value, or a text node's data, on the other hand, is very fast; you just change a string pointer and that's it. This is going to be much faster than serialising the parent with innerHTML, changing it, and parsing it back in (and won't lose your unserialisable data like event handlers, JS references and form values).
There are techniques to do DOM manipulations without so much slow childNodes walking. In particular, be aware of the possibilities of cloneNode
, and using DocumentFragment
. But sometimes innerHTML really is quicker. You can still get the best of both worlds by using innerHTML to write your basic structure with placeholders for attribute values and text content, which you then fill in afterwards using DOM. This saves you having to write your own escapehtml()
function to get around the escaping/security problems mentioned above.
The reason you are getting the the IOException is because you are not catching the IOException of your countLines method. You'll want to do something like this:
public static void main(String[] args) {
int lines = 0;
// TODO - Need to get the filename to populate sFileName. Could
// come from the command line arguments.
try {
lines = LineCounter.countLines(sFileName);
}
catch(IOException ex){
System.out.println (ex.toString());
System.out.println("Could not find file " + sFileName);
}
if(lines > 0) {
// Do rest of program.
}
}
const fs = require('fs');
try {
fs.mkdirSync(path, { recursive: true });
} catch (error) {
// this make script keep running, even when folder already exist
console.log(error);
}
final static String EXTRA_MESSAGE = "edit.list.message";
Context context;
public void onClick (View view)
{
Intent intent = new Intent(this,display.class);
RelativeLayout relativeLayout = (RelativeLayout) view.getParent();
TextView textView = (TextView) relativeLayout.findViewById(R.id.textView1);
String message = textView.getText().toString();
intent.putExtra(EXTRA_MESSAGE,message);
startActivity(intent);
}
Try dir /b
, for bare format.
dir /?
will show you documentation of what you can do with the dir
command. Here is the output from my Windows 7 machine:
C:\>dir /?
Displays a list of files and subdirectories in a directory.
DIR [drive:][path][filename] [/A[[:]attributes]] [/B] [/C] [/D] [/L] [/N]
[/O[[:]sortorder]] [/P] [/Q] [/R] [/S] [/T[[:]timefield]] [/W] [/X] [/4]
[drive:][path][filename]
Specifies drive, directory, and/or files to list.
/A Displays files with specified attributes.
attributes D Directories R Read-only files
H Hidden files A Files ready for archiving
S System files I Not content indexed files
L Reparse Points - Prefix meaning not
/B Uses bare format (no heading information or summary).
/C Display the thousand separator in file sizes. This is the
default. Use /-C to disable display of separator.
/D Same as wide but files are list sorted by column.
/L Uses lowercase.
/N New long list format where filenames are on the far right.
/O List by files in sorted order.
sortorder N By name (alphabetic) S By size (smallest first)
E By extension (alphabetic) D By date/time (oldest first)
G Group directories first - Prefix to reverse order
/P Pauses after each screenful of information.
/Q Display the owner of the file.
/R Display alternate data streams of the file.
/S Displays files in specified directory and all subdirectories.
/T Controls which time field displayed or used for sorting
timefield C Creation
A Last Access
W Last Written
/W Uses wide list format.
/X This displays the short names generated for non-8dot3 file
names. The format is that of /N with the short name inserted
before the long name. If no short name is present, blanks are
displayed in its place.
/4 Displays four-digit years
Switches may be preset in the DIRCMD environment variable. Override
preset switches by prefixing any switch with - (hyphen)--for example, /-W.
The other answers here are useful but they don't cover how to access Pacific specifically - here you go:
public static DateTime GmtToPacific(DateTime dateTime)
{
return TimeZoneInfo.ConvertTimeFromUtc(dateTime,
TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time"));
}
Oddly enough, although "Pacific Standard Time" normally means something different from "Pacific Daylight Time," in this case it refers to Pacific time in general. In fact, if you use FindSystemTimeZoneById
to fetch it, one of the properties available is a bool telling you whether that timezone is currently in daylight savings or not.
You can see more generalized examples of this in a library I ended up throwing together to deal with DateTimes I need in different TimeZones based on where the user is asking from, etc:
https://github.com/b9chris/TimeZoneInfoLib.Net
This won't work outside of Windows (for example Mono on Linux) since the list of times comes from the Windows Registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\
Underneath that you'll find keys (folder icons in Registry Editor); the names of those keys are what you pass to FindSystemTimeZoneById
. On Linux you have to use a separate Linux-standard set of timezone definitions, which I've not adequately explored.
Use this:
SELECT s.name AS Student, c.name AS Course
FROM student s
LEFT JOIN (bridge b CROSS JOIN course c)
ON (s.id = b.sid AND b.cid = c.id);
In jquery, u can delcare variable two styles.
One is,
$.name = 'anirudha';
alert($.name);
Second is,
var hText = $("#head1").text();
Second is used when you read data from textbox
, label
, etc.
Based on the comments left above I ran this under sqlplus instead of SQL Developer and the UPDATE statement ran perfectly, leaving me to believe this is an issue in SQL Developer particularly as there was no ORA error number being returned. Thank you for leading me in the right direction.
The problem is that your ui
property uses a forward declaration of class Ui::MainWindowClass
, hence the "incomplete type" error.
Including the header file in which this class is declared will fix the problem.
EDIT
Based on your comment, the following code:
namespace Ui
{
class MainWindowClass;
}
does NOT declare a class. It's a forward declaration, meaning that the class will exist at some point, at link time.
Basically, it just tells the compiler that the type will exist, and that it shouldn't warn about it.
But the class has to be defined somewhere.
Note this can only work if you have a pointer to such a type.
You can't have a statically allocated instance of an incomplete type.
So either you actually want an incomplete type, and then you should declare your ui
member as a pointer:
namespace Ui
{
// Forward declaration - Class will have to exist at link time
class MainWindowClass;
}
class MainWindow : public QMainWindow
{
private:
// Member needs to be a pointer, as it's an incomplete type
Ui::MainWindowClass * ui;
};
Or you want a statically allocated instance of Ui::MainWindowClass
, and then it needs to be declared.
You can do it in another header file (usually, there's one header file per class).
But simply changing the code to:
namespace Ui
{
// Real class declaration - May/Should be in a specific header file
class MainWindowClass
{};
}
class MainWindow : public QMainWindow
{
private:
// Member can be statically allocated, as the type is complete
Ui::MainWindowClass ui;
};
will also work.
Note the difference between the two declarations. First uses a forward declaration, while the second one actually declares the class (here with no properties nor methods).
I have today similar problem. But weirder.
host pl.archive.ubuntu.com
dig pl.archive.ubuntu.com
, dig @127.0.1.1 pl.archive.ubuntu.com
$ curl -v http://google.com/
* Trying 172.217.18.78...
* Connected to google.com (172.217.18.78) port 80 (#0)
> GET / HTTP/1.1
> Host: google.com
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 302 Found
< Cache-Control: private
< Content-Type: text/html; charset=UTF-8
< Referrer-Policy: no-referrer
< Location: http://www.google.pl/?gfe_rd=cr&ei=pt9UWfqXL4uBX_W5n8gB
< Content-Length: 256
< Date: Thu, 29 Jun 2017 11:08:22 GMT
<
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://www.google.pl/?gfe_rd=cr&ei=pt9UWfqXL4uBX_W5n8gB">here</A>.
</BODY></HTML>
* Connection #0 to host google.com left intact
$ curl -v http://pl.archive.ubuntu.com/
* Could not resolve host: pl.archive.ubuntu.com
* Closing connection 0
curl: (6) Could not resolve host: pl.archive.ubuntu.com
Revelation
Eventually I used strace
on curl and found that it was connection to nscd
deamon.
connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = 0
Solution
I've restarted the nscd service (Name Service Cache Daemon) and it helped to solve this issue!
systemctl restart nscd.service
This comes in late but was quite helpful. I am Just posting for future reference
DataTable dt = new DataTable();
Data.DataView dv = default(Data.DataView);
dv = (Data.DataView)ds.Select(DataSourceSelectArguments.Empty);
dt = dv.ToTable();
You can use ndiff in the difflib module to do this. It has all the information necessary to convert one string into another string.
A simple example:
import difflib
cases=[('afrykanerskojezyczny', 'afrykanerskojezycznym'),
('afrykanerskojezyczni', 'nieafrykanerskojezyczni'),
('afrykanerskojezycznym', 'afrykanerskojezyczny'),
('nieafrykanerskojezyczni', 'afrykanerskojezyczni'),
('nieafrynerskojezyczni', 'afrykanerskojzyczni'),
('abcdefg','xac')]
for a,b in cases:
print('{} => {}'.format(a,b))
for i,s in enumerate(difflib.ndiff(a, b)):
if s[0]==' ': continue
elif s[0]=='-':
print(u'Delete "{}" from position {}'.format(s[-1],i))
elif s[0]=='+':
print(u'Add "{}" to position {}'.format(s[-1],i))
print()
prints:
afrykanerskojezyczny => afrykanerskojezycznym
Add "m" to position 20
afrykanerskojezyczni => nieafrykanerskojezyczni
Add "n" to position 0
Add "i" to position 1
Add "e" to position 2
afrykanerskojezycznym => afrykanerskojezyczny
Delete "m" from position 20
nieafrykanerskojezyczni => afrykanerskojezyczni
Delete "n" from position 0
Delete "i" from position 1
Delete "e" from position 2
nieafrynerskojezyczni => afrykanerskojzyczni
Delete "n" from position 0
Delete "i" from position 1
Delete "e" from position 2
Add "k" to position 7
Add "a" to position 8
Delete "e" from position 16
abcdefg => xac
Add "x" to position 0
Delete "b" from position 2
Delete "d" from position 4
Delete "e" from position 5
Delete "f" from position 6
Delete "g" from position 7
Try the following instead:
<html>
<head>
<title>Table row styling</title>
<style type="text/css">
.bb td, .bb th {
border-bottom: 1px solid black !important;
}
</style>
</head>
<body>
<table>
<tr class="bb">
<td>This</td>
<td>should</td>
<td>work</td>
</tr>
</table>
</body>
</html>
I had a similar problem just now and my solution might help. I'm using an iframe to upload and convert an xml file to json and send it back behind the scenes, and Chrome was adding some garbage to the incoming data that only would show up intermittently and cause the "Uncaught SyntaxError: Unexpected token o" error.
I was accessing the iframe data like this:
$('#load-file-iframe').contents().text()
which worked fine on localhost, but when I uploaded it to the server it stopped working only with some files and only when loading the files in a certain order. I don't really know what caused it, but this fixed it. I changed the line above to
$('#load-file-iframe').contents().find('body').text()
once I noticed some garbage in the HTML response.
Long story short check your raw HTML response data and you might turn something up.
Since I do troubleshooting everyday as a part of my job, here is what I would like to do:
Since it's SQL Server 2008 R2, you can run SQLDiag which comes as a part of the product. You can refer books online for more details. In brief, capture Server Side trace and blocker script.
Once trace is captured, look for "Attention" event. That would be the spid which has received the error. If you filter by SPID, you would see RPC:Completed event before "Attention". Check the time over there. Is that time 30 seconds? If yes, then client waited for 30 second to get response from SQL and got "timed out" [This is client setting as SQL would never stop and connection]
Now, check if the query which was running really should take 30 seconds?
If yes then tune the query or increase the timeout setting from the client.
If no then this query must be waiting for some resources (blocked)
At this point go back to Blocker Script and check the time frame when "Attention" came
Above is assuming that issue is with SQL Server not network related!
That is not HTML, but PHP. It is called the HEREDOC string method, and is an alternative to using quotes for writing multiline strings.
The HTML in your example will be:
<tr>
<td>TEST</td>
</tr>
Read the PHP documentation that explains it.
I had some issues playing on Android Phone. After few tries I found out that when Data Saver is on there is no auto play:
There is no autoplay if Data Saver mode is enabled. If Data Saver mode is enabled, autoplay is disabled in Media settings.
You can create your own lock with GET_LOCK(lockName,timeOut)
If you do a GET_LOCK(lockName, 0)
with a 0 time out before you lock the tables and then follow that with a RELEASE_LOCK(lockName)
then all other threads performing a GET_LOCK()
will get a value of 0 which will tell them that the lock is being held by another thread.
However this won't work if you don't have all threads calling GET_LOCK()
before locking tables. The documentation for locking tables is here
Hope that helps!
You can access the index attribute of a df using df.index[i]
>> import pandas as pd
>> import numpy as np
>> df = pd.DataFrame({'a':np.arange(5), 'b':np.random.randn(5)})
a b
0 0 1.088998
1 1 -1.381735
2 2 0.035058
3 3 -2.273023
4 4 1.345342
>> df.index[1] ## Second index
>> df.index[-1] ## Last index
>> for i in xrange(len(df)):print df.index[i] ## Using loop
...
0
1
2
3
4
A single quote is represented using \x27
Like in
awk 'BEGIN {FS=" ";} {printf "\x27%s\x27 ", $1}'
Cause :
This issue is caused:
1- tomcat can't find the jvm file from the directory specified to start the service because is deleted.
2- Incorrect permissions to the java folder for read&write access
3- Incorrect JAVA_HOME path.
4- Antivirus deleted the jvm file from java folder
Resolution:
1- confirm that especified file exisit in the java directoy.
2- Make sure that file has read&write permissions.
3- Confirm that JAVA_HOME is correct for java version.
4- if file has been deleted reinstall same java version to recreate missing files.
select u from UserGroup ug inner join ug.user u
where ug.group_id = :groupId
order by u.lastname
As a named query:
@NamedQuery(
name = "User.findByGroupId",
query =
"SELECT u FROM UserGroup ug " +
"INNER JOIN ug.user u WHERE ug.group_id = :groupId ORDER BY u.lastname"
)
Use paths in the HQL statement, from one entity to the other. See the Hibernate documentation on HQL and joins for details.
See my code which may help you. models.py
from django.db import models
class Customer(models.Model):
name = models.CharField(max_length=100)
email = models.EmailField(max_length=100)
password = models.CharField(max_length=100)
instrument_purchase = models.CharField(max_length=100)
house_no = models.CharField(max_length=100)
address_line1 = models.CharField(max_length=100)
address_line2 = models.CharField(max_length=100)
telephone = models.CharField(max_length=100)
zip_code = models.CharField(max_length=20)
state = models.CharField(max_length=100)
country = models.CharField(max_length=100)
def __str__(self):
return self.name
forms.py
from django import forms
from models import *
class CustomerForm(forms.ModelForm):
password = forms.CharField(widget=forms.PasswordInput)
class Meta:
model = Customer
fields = ('name', 'email', 'password', 'instrument_purchase', 'house_no', 'address_line1', 'address_line2', 'telephone', 'zip_code', 'state', 'country')
Use <text>
:
<script type="text/javascript">
var data = [];
@foreach (var r in Model.rows)
{
<text>
data.push([ @r.UnixTime * 1000, @r.Value ]);
</text>
}
</script>
Yes, with set_index you can make Locality
your row index.
data.set_index('Locality', inplace=True)
If inplace=True
is not provided, set_index
returns the modified dataframe as a result.
Example:
> import pandas as pd
> df = pd.DataFrame([['ABBOTSFORD', 427000, 448000],
['ABERFELDIE', 534000, 600000]],
columns=['Locality', 2005, 2006])
> df
Locality 2005 2006
0 ABBOTSFORD 427000 448000
1 ABERFELDIE 534000 600000
> df.set_index('Locality', inplace=True)
> df
2005 2006
Locality
ABBOTSFORD 427000 448000
ABERFELDIE 534000 600000
> df.loc['ABBOTSFORD']
2005 427000
2006 448000
Name: ABBOTSFORD, dtype: int64
> df.loc['ABBOTSFORD'][2005]
427000
> df.loc['ABBOTSFORD'].values
array([427000, 448000])
> df.loc['ABBOTSFORD'].tolist()
[427000, 448000]
In my case I was getting this error trying to use the IS_ROLEMEMBER()
function on SQL Server 2008 R2. This function isn't valid prior to SQL Server 2012.
Instead of this function I ended up using
select 1
from sys.database_principals u
inner join sys.database_role_members ur
on u.principal_id = ur.member_principal_id
inner join sys.database_principals r
on ur.role_principal_id = r.principal_id
where r.name = @role_name
and u.name = @username
Significantly more verbose, but it gets the job done.
for _ in {1..10}; do command; done
Note the underscore instead of using a variable.
Yes, there are negative effects from this:
If you script out a change blocked by this flag you get something like the script below (all i am turning the ID column in Contact into an autonumbered IDENTITY column, but the table has dependencies). Note potential errors that can occur while the following is running:
--
/* To prevent any potential data loss issues, you should review this script in detail before running it outside the context of the database designer.*/
BEGIN TRANSACTION
GO
ALTER TABLE raw.Contact
DROP CONSTRAINT fk_Contact_AddressType
GO
ALTER TABLE ref.ContactpointType SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
BEGIN TRANSACTION
GO
ALTER TABLE raw.Contact
DROP CONSTRAINT fk_contact_profile
GO
ALTER TABLE raw.Profile SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
BEGIN TRANSACTION
GO
CREATE TABLE raw.Tmp_Contact
(
ContactID int NOT NULL IDENTITY (1, 1),
ProfileID int NOT NULL,
AddressType char(2) NOT NULL,
ContactText varchar(250) NULL
) ON [PRIMARY]
GO
ALTER TABLE raw.Tmp_Contact SET (LOCK_ESCALATION = TABLE)
GO
SET IDENTITY_INSERT raw.Tmp_Contact ON
GO
IF EXISTS(SELECT * FROM raw.Contact)
EXEC('INSERT INTO raw.Tmp_Contact (ContactID, ProfileID, AddressType, ContactText)
SELECT ContactID, ProfileID, AddressType, ContactText FROM raw.Contact WITH (HOLDLOCK TABLOCKX)')
GO
SET IDENTITY_INSERT raw.Tmp_Contact OFF
GO
ALTER TABLE raw.PostalAddress
DROP CONSTRAINT fk_AddressProfile
GO
ALTER TABLE raw.MarketingFlag
DROP CONSTRAINT fk_marketingflag_contact
GO
ALTER TABLE raw.Phones
DROP CONSTRAINT fk_phones_contact
GO
DROP TABLE raw.Contact
GO
EXECUTE sp_rename N'raw.Tmp_Contact', N'Contact', 'OBJECT'
GO
ALTER TABLE raw.Contact ADD CONSTRAINT
Idx_Contact_1 PRIMARY KEY CLUSTERED
(
ProfileID,
ContactID
)
GO
ALTER TABLE raw.Contact ADD CONSTRAINT
Idx_Contact UNIQUE NONCLUSTERED
(
ProfileID,
ContactID
)
GO
CREATE NONCLUSTERED INDEX idx_Contact_0 ON raw.Contact
(
AddressType
)
GO
ALTER TABLE raw.Contact ADD CONSTRAINT
fk_contact_profile FOREIGN KEY
(
ProfileID
) REFERENCES raw.Profile
(
ProfileID
) ON UPDATE NO ACTION
ON DELETE NO ACTION
GO
ALTER TABLE raw.Contact ADD CONSTRAINT
fk_Contact_AddressType FOREIGN KEY
(
AddressType
) REFERENCES ref.ContactpointType
(
ContactPointTypeCode
) ON UPDATE NO ACTION
ON DELETE NO ACTION
GO
COMMIT
BEGIN TRANSACTION
GO
ALTER TABLE raw.Phones ADD CONSTRAINT
fk_phones_contact FOREIGN KEY
(
ProfileID,
PhoneID
) REFERENCES raw.Contact
(
ProfileID,
ContactID
) ON UPDATE NO ACTION
ON DELETE NO ACTION
GO
ALTER TABLE raw.Phones SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
BEGIN TRANSACTION
GO
ALTER TABLE raw.MarketingFlag ADD CONSTRAINT
fk_marketingflag_contact FOREIGN KEY
(
ProfileID,
ContactID
) REFERENCES raw.Contact
(
ProfileID,
ContactID
) ON UPDATE NO ACTION
ON DELETE NO ACTION
GO
ALTER TABLE raw.MarketingFlag SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
BEGIN TRANSACTION
GO
ALTER TABLE raw.PostalAddress ADD CONSTRAINT
fk_AddressProfile FOREIGN KEY
(
ProfileID,
AddressID
) REFERENCES raw.Contact
(
ProfileID,
ContactID
) ON UPDATE NO ACTION
ON DELETE NO ACTION
GO
ALTER TABLE raw.PostalAddress SET (LOCK_ESCALATION = TABLE)
GO
COMMIT
You are right, the documentation lacks of those methods. However when I dug into rxjs repository, I found nice comments about tap (too long to paste here) and pipe operators:
/**
* Used to stitch together functional operators into a chain.
* @method pipe
* @return {Observable} the Observable result of all of the operators having
* been called in the order they were passed in.
*
* @example
*
* import { map, filter, scan } from 'rxjs/operators';
*
* Rx.Observable.interval(1000)
* .pipe(
* filter(x => x % 2 === 0),
* map(x => x + x),
* scan((acc, x) => acc + x)
* )
* .subscribe(x => console.log(x))
*/
Pipe: Used to stitch together functional operators into a chain. Before we could just do observable.filter().map().scan()
, but since every RxJS operator is a standalone function rather than an Observable's method, we need pipe()
to make a chain of those operators (see example above).
Tap: Can perform side effects with observed data but does not modify the stream in any way. Formerly called do()
. You can think of it as if observable was an array over time, then tap()
would be an equivalent to Array.forEach()
.
This method works best to me:
Element.prototype.remove = function() {
this.parentElement.removeChild(this);
}
NodeList.prototype.remove = HTMLCollection.prototype.remove = function() {
for(var i = this.length - 1; i >= 0; i--) {
if(this[i] && this[i].parentElement) {
this[i].parentElement.removeChild(this[i]);
}
}
}
To use it we can deploy like this:
document.getElementsByID('DIV_Id').remove();
or
document.getElementsByClassName('DIV_Class').remove();
Another way with lodash
creating pairs, and then either construct a object or ES6 Map
easily
_(params).map(v=>[v.name, v.input]).fromPairs().value()
or
_.fromPairs(params.map(v=>[v.name, v.input]))
Here is a working example
var params = [_x000D_
{ name: 'foo', input: 'bar' },_x000D_
{ name: 'baz', input: 'zle' }_x000D_
];_x000D_
_x000D_
var obj = _(params).map(v=>[v.name, v.input]).fromPairs().value();_x000D_
_x000D_
console.log(obj);
_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>
_x000D_
You can do it with a sub-query:
SELECT * FROM (
SELECT * FROM table ORDER BY id DESC LIMIT 50
) sub
ORDER BY id ASC
This will select the last 50 rows from table
, and then order them in ascending order.
Use str_replace function of PHP.
Something like:
$str = str_replace(' ', '_', $str);
In single line to print the element or array.
print $_ for (@array);
NOTE: remember that $_ is internally referring to the element of @array in loop. Any changes made in $_ will reflect in @array; ex.
my @array = qw( 1 2 3 );
for (@array) {
$_ = $_ *2 ;
}
print "@array";
output: 2 4 6
Use Lookupstage to decide whether to insert or update. Check this link for more info - http://beingoyen.blogspot.com/2010/03/ssis-how-to-update-instead-of-insert.html
Steps to do update:
Under Custom properties select SQLCOMMAND and insert update command ex:
UPDATE table1 SET col1 = ?, col2 = ? where id = ?
map columns in exact order from source to output as in update command
I guess anther way, possibly faster, to achieve this is
1) Use dict comprehension to get desired dict (i.e., taking 2nd col of each array)
2) Then use pd.DataFrame
to create an instance directly from the dict without loop over each col and concat.
Assuming your mat
looks like this (you can ignore this since your mat
is loaded from file):
In [135]: mat = {'a': np.random.randint(5, size=(4,2)),
.....: 'b': np.random.randint(5, size=(4,2))}
In [136]: mat
Out[136]:
{'a': array([[2, 0],
[3, 4],
[0, 1],
[4, 2]]), 'b': array([[1, 0],
[1, 1],
[1, 0],
[2, 1]])}
Then you can do:
In [137]: df = pd.DataFrame ({name:mat[name][:,1] for name in mat})
In [138]: df
Out[138]:
a b
0 0 0
1 4 1
2 1 0
3 2 1
[4 rows x 2 columns]
Only Visual Studio 2015 Enterprise has code coverage built-in. See the feature matrix for details.
You can use the OpenCover.UI extension for code coverage check inside Visual Studio. It supports MSTest, nUnit, and xUnit.
The new version can be downloaded from here (release notes).
According to the Apple Human Interface Guidelines:
@1x : about 25 x 25 (max: 48 x 32)
@2x : about 50 x 50 (max: 96 x 64)
@3x : about 75 x 75 (max: 144 x 96)
It's not that key is a special word, but that dictionaries implement the iterator protocol. You could do this in your class, e.g. see this question for how to build class iterators.
In the case of dictionaries, it's implemented at the C level. The details are available in PEP 234. In particular, the section titled "Dictionary Iterators":
Dictionaries implement a tp_iter slot that returns an efficient iterator that iterates over the keys of the dictionary. [...] This means that we can write
for k in dict: ...
which is equivalent to, but much faster than
for k in dict.keys(): ...
as long as the restriction on modifications to the dictionary (either by the loop or by another thread) are not violated.
Add methods to dictionaries that return different kinds of iterators explicitly:
for key in dict.iterkeys(): ... for value in dict.itervalues(): ... for key, value in dict.iteritems(): ...
This means that
for x in dict
is shorthand forfor x in dict.iterkeys()
.
In Python 3, dict.iterkeys()
, dict.itervalues()
and dict.iteritems()
are no longer supported. Use dict.keys()
, dict.values()
and dict.items()
instead.
You can use parentheses to override rules of precedence.
I worked it around through this "hiding" div ...
<div STYLE="position:absolute;display:none;"><INPUT type='file' id='file1' name='files[]'></div>
The below works for me
dataframe[,"newName"] <- NA
Make sure to add ""
for new name string.
If you don't mind a bit more markup, this would work:
<div class="centered">
<button class="btn btn-large btn-primary" type="button">Submit</button>
</div>
With the corresponding CSS rule:
.centered
{
text-align:center;
}
I have to look at the CSS rules for the btn
class, but I don't think it specifies a width, so auto
left & right margins wouldn't work. If you added one of the span
or input-
rules to the button, auto margins would work, though.
Edit:
Confirmed my initial thought; the btn
classes do not have a width defined, so you can't use auto side margins. Also, as @AndrewM notes, you could simply use the text-center
class instead of creating a new ruleset.
Yet another way of doing this in Javascript using inline onclick
, IIFE
, event
and preventDefault()
:
<a href='#' onclick="(function(e){e.preventDefault();})(event)">Click Me</a>
I tried this in one of my databases.
To get it to work, the user had to be added to the database housing the actual data. No rights were needed, just access.
Have you considered keeping the view in the database it references? Re usability and all if its benefits could follow.
but is the css style tag the correct way to get cross browser compatibility?
<textarea style="display:none;" ></textarea>
or what I learned long ago....
<textarea hidden ></textarea>
or
the global hidden element method:
<textarea hidden="hidden" ></textarea>
This will not work in case of Boolean values coming from DB for ex:
value = false
if(!value) {
// it will change all false values to not available
return "not available"
}
Looks like "+x" causes problems:
root@raspi1:~# cat > /tmp/btest
#!/bin/bash
jobname="job_201312161447_0003"
jobname_pre=${jobname:0:16}
jobname_post=${jobname:17}
root@raspi1:~# chmod +x /tmp/btest
root@raspi1:~# /tmp/btest
root@raspi1:~# sh -x /tmp/btest
+ jobname=job_201312161447_0003
/tmp/btest: 4: /tmp/btest: Bad substitution
You don't want to stretch the span in height?
You have the possiblity to affect one or more flex-items to don't stretch the full height of the container.
To affect all flex-items of the container, choose this:
You have to set align-items: flex-start;
to div
and all flex-items of this container get the height of their content.
div {_x000D_
align-items: flex-start;_x000D_
background: tan;_x000D_
display: flex;_x000D_
height: 200px;_x000D_
}_x000D_
span {_x000D_
background: red;_x000D_
}
_x000D_
<div>_x000D_
<span>This is some text.</span>_x000D_
</div>
_x000D_
To affect only a single flex-item, choose this:
If you want to unstretch a single flex-item on the container, you have to set align-self: flex-start;
to this flex-item. All other flex-items of the container aren't affected.
div {_x000D_
display: flex;_x000D_
height: 200px;_x000D_
background: tan;_x000D_
}_x000D_
span.only {_x000D_
background: red;_x000D_
align-self:flex-start;_x000D_
}_x000D_
span {_x000D_
background:green;_x000D_
}
_x000D_
<div>_x000D_
<span class="only">This is some text.</span>_x000D_
<span>This is more text.</span>_x000D_
</div>
_x000D_
Why is this happening to the span
?
The default value of the property align-items
is stretch
. This is the reason why the span
fill the height of the div
.
Difference between baseline
and flex-start
?
If you have some text on the flex-items, with different font-sizes, you can use the baseline of the first line to place the flex-item vertically. A flex-item with a smaller font-size have some space between the container and itself at top. With flex-start
the flex-item will be set to the top of the container (without space).
div {_x000D_
align-items: baseline;_x000D_
background: tan;_x000D_
display: flex;_x000D_
height: 200px;_x000D_
}_x000D_
span {_x000D_
background: red;_x000D_
}_x000D_
span.fontsize {_x000D_
font-size:2em;_x000D_
}
_x000D_
<div>_x000D_
<span class="fontsize">This is some text.</span>_x000D_
<span>This is more text.</span>_x000D_
</div>
_x000D_
You can find more information about the difference between
baseline
andflex-start
here:
What's the difference between flex-start and baseline?
It's simple, whenever you see
x->y
know it is the same as
(*x).y
You can set the ReadOnly property to true.
Quoth the link:
When this property is set to true, the contents of the control cannot be changed by the user at runtime. With this property set to true, you can still set the value of the Text property in code. You can use this feature instead of disabling the control with the Enabled property to allow the contents to be copied and ToolTips to be shown.
[[]]*3
is not the same as [[], [], []]
.
It's as if you'd said
a = []
listy = [a, a, a]
In other words, all three list references refer to the same list instance.
I made a performance test comparing split with regex, with a string and doing it with a for loop.
It seems that the for loop is the fastest.
NOTE: this code 'as is' is not useful for windows nor macos endline, but should be ok to compare performance.
Split with string:
split('\n').length;
Split with regex:
split(/\n/).length;
Split using for:
var length = 0;
for(var i = 0; i < sixteen.length; ++i)
if(sixteen[i] == s)
length++;
Try getParent()
at the argument place of context
like new AlertDialog.Builder(getParent());
Hope it will work, it worked for me.
NB This answer is factually incorrect; as pointed out by a comment below, success() does return the original promise. I'll not change; and leave it to OP to edit.
The major difference between the 2 is that .then()
call returns a promise (resolved with a value returned from a callback) while .success()
is more traditional way of registering callbacks and doesn't return a promise.
Promise-based callbacks (.then()
) make it easy to chain promises (do a call, interpret results and then do another call, interpret results, do yet another call etc.).
The .success()
method is a streamlined, convenience method when you don't need to chain call nor work with the promise API (for example, in routing).
In short:
.then()
- full power of the promise API but slightly more verbose.success()
- doesn't return a promise but offeres slightly more convienient syntaxSimply use this:
spinner.getItemAtPosition(spinner.getSelectedItemPosition()).toString();
This will give you the String
of the selected item in the Spinner
.
Use set_index
with stack
for MultiIndex Series
, then for DataFrame
add reset_index
with rename
:
df1 = (df.set_index(["location", "name"])
.stack()
.reset_index(name='Value')
.rename(columns={'level_2':'Date'}))
print (df1)
location name Date Value
0 A test Jan-2010 12
1 A test Feb-2010 20
2 A test March-2010 30
3 B foo Jan-2010 18
4 B foo Feb-2010 20
5 B foo March-2010 25
I usually combine CSS and JavaScript approaches, so that it works without JavaScript in all browsers but IE6/7, and in IE6/7 with JavaScript on (but not off), since they does not support the :last-child
pseudo-class.
$("li:last-child").addClass("last-child");
li:last-child,li.last-child{ /* ... */ }
If you use Eclipse Collections you can use the collectIf()
method.
MutableList<Integer> source =
Lists.mutable.with(1, null, 2, null, 3, null, 4, null, 5);
MutableList<String> result = source.collectIf(Objects::nonNull, String::valueOf);
Assert.assertEquals(Lists.immutable.with("1", "2", "3", "4", "5"), result);
It evaluates eagerly and should be a bit faster than using a Stream.
Note: I am a committer for Eclipse Collections.
I got the way to redirect the out put to console as well as to a text file as well simultaneously:
te = open('log.txt','w') # File where you need to keep the logs
class Unbuffered:
def __init__(self, stream):
self.stream = stream
def write(self, data):
self.stream.write(data)
self.stream.flush()
te.write(data) # Write the data of stdout here to a text file as well
sys.stdout=Unbuffered(sys.stdout)
maybe this article can help you link here
Write-through: Write is done synchronously both to the cache and to the backing store.
Write-back (or Write-behind): Writing is done only to the cache. A modified cache block is written back to the store, just before it is replaced.
Write-through: When data is updated, it is written to both the cache and the back-end storage. This mode is easy for operation but is slow in data writing because data has to be written to both the cache and the storage.
Write-back: When data is updated, it is written only to the cache. The modified data is written to the back-end storage only when data is removed from the cache. This mode has fast data write speed but data will be lost if a power failure occurs before the updated data is written to the storage.
To explain the problem, your error is as follows:
LoadError: cannot load such file -- uglifier
(in /home/cool_tech/cool_tech/app/assets/javascripts/application.js)
This means somewhere in application.js
, your app is referencing uglifier
(probably in the manifest
area at the top of the file). To fix the issue, you either need to remove the reference to uglifier
, or make sure the uglifier
file is present in your app, hence the answers you've been provided
Fix
If you've had no luck with adding the gem to your GemFile, a quick fix would be to remove any reference to uglifier
in your application.js
manifest. This, of course, will be temporary, but will at least allow you to precompile your assets
SELECT DISTINCT Call.id
FROM Call
LEFT OUTER JOIN Phone_book USING (id)
WHERE Phone_book.id IS NULL
This will return the extra id-s that are missing in your Phone_book table.
for i in range(1,len(na_rm.columns)):
print ("column name:", na_rm.columns[i])
Output :
column name: seretide_price
column name: symbicort_mkt_shr
column name: symbicort_price
Check for table compatibility. For example, if one table is MyISAM
and the other one is InnoDB
, you may have this issue.
Answer given by kennyut/Kistian works very well but to get exact RDD like output when RDD consist of list of attributes e.g. [1,2,3,4] we can use flatmap command as below,
rdd = df.rdd.flatMap(list)
or
rdd = df.rdd.flatmap(lambda x: list(x))
I had this problem, but fixed it by referencing the DLL from "C:\Program Files\Reference Assemblies\Microsoft\Windows Identity Foundation\v3.5\Microsoft.IdentityModel.dll"
Go to reference properties and set Copy Local to True for the DLL. The DLL will now be included in the azure package.
There is no need to install virtualenv. Just create a workfolder and open your editor in it. Assuming you are using vscode,
$mkdir Directory && cd Directory
$code .
It is the best way to avoid breaking Ubuntu/linux dependencies by messing around with environments. In case anything goes wrong, you can always delete that folder and begin afresh. Otherwise, messing up with the ubuntu/linux python environments could mess up system apps/OS (including the terminal). Then you can press shift+P and type python:select interpreter. Choose any version above 3. After that you can do
$pip3 -v
It will display the pip version. You can then use it for installations as
$pip3 install Library
In your product.service.ts you are using stringify method in a wrong way..
Just use
JSON.stringify(product)
instead of
JSON.stringify({product})
i have checked your problem and after this it's working absolutely fine.
It could be a faulty name of a drawable file. I had an image I was using that was named Untitled
. Changing the name solved my problem.
Please do the import like below:
import { Router } from '@angular/Router';
The mistake that was being done was -> import { Router } from '@angular/router';
I wrote a bash script that should automate the process written by Yakov Fain below. It can be called like ./removeComponent myComponentName This has only been tested with Angular 6
#!/bin/bash
if [ "$#" -ne 1 ]; then
echo "Input a component to delete"
exit 1
fi
# finds folder with component name and deletes
find . -type d -name $1 | xargs rm -rf
# removes lines referencing the component from app.module.ts
grep -v $1 app.module.ts > temp
mv temp app.module.ts
componentName=$1
componentName+="Component"
grep -v -i $componentName app.module.ts > temp
mv temp app.module.ts
The answers provided by other users here : How to SSH to a VirtualBox guest externally through a host?
... helped me to accomplish the task of connecting from out on the internet to my home computer's guest machine. You should be able to connect using computers, tablets, and smart phones (android, IPhone,etc). I add a few more step in case it might be helpful to someone else:
Here is a quick diagram of my setup:
Remote device ---> INTERNET --> MODEM --> ROUTER --> HOST MACHINE --> GUEST VM
Remote device (ssh client) ---> PASS THRU DEVICES ---> GUEST VM (ssh server)
Remote device (leave ssh port 3022) ---> INTERNET --> MODEM --> ROUTER (FWD frm:p3022 to:p3022)--> HOST MACHINE (FWD frm:p3022 to:p22) --> GUEST VM (arrive ssh port 22)
The key for me was to realize that ALL connections was PASSING-THROUGH
intermediary devices to get from my remote PC to my guest virtual-machine at home --Hence port forwarding!
Notes: * Need ssh client to request a secure connection and a running ssh server to process the secure connection.
I will forward the port 3022 as used in the chosen answer from above.
Enter your IPs where needed (home modem/router, host IP, guest IP,etc.), Names chosen are just examples-use or change.
1.Create ssh tunnel to port 3022 on your modem's IP / router's external IP address.
ssh client/device possible commands: ssh -p 3022 user-name@home_external_IP
2.Port forward = we are passing thru the connection from router to host machine
Also make sure firewall /IPtable rules on router is allowing ports to be forward (open if needed)
Router's Pfwd SCREEN required entries: AppName:SSH_Fwd, Port_from: 3022, Protocol:both (UDP/TCP), IP_address:hostIP_address, Port_to:3022, everything else can be blank
DD-WRT router software resources / Info:
3.Host Machine Firewall: open port 3022 #so forwarded port can pass thru to guest machine
Host Machine: Install VirtualBox, guest additions, and guest machine if not done already
Configure guest machine and then follow the Network section below
I used VirtualBox GUI to setup guest's network- easier than CLI
If you want to use other methods refer to : VirtualBox/manual/ch06.html#natforward
4.Some suggest using Network Bridge adapter for guest = access to LAN and other machines on your LAN. This also pose an increase security risk, because now your guest machine is now exposed to LAN machines and possibly the INTERNET hackers if firewall not setup properly. So I selected Network adapter attached to NAT for less exposure to bridged security risks.
On the guest machine do the following:
Also there are different ssh servers and clients depending on platform using.
wikipedia/Secure_Shell
wikipedia/Comparison_of_SSH_servers
wikipedia/Comparison_of_SSH_clients
For Ubuntu Users:
ubuntu community: SSHOpenSSH/Configuring
ubuntu/community: OpenSSH/Keys
That should be it. If I made a mistake or want to add anything -feel free to do so-- I am still a noob.
Hope this helps someone. Good luck!
Some tips:
About your questions:
An inputMethod is basically an Android Service
, so yes, you can do HTTP and all the stuff you can do in a Service
.
You can open Activities
and dialogs from the InputMethod
. Once again, it's just a Service
.
I've been developing an IME, so ask again if you run into an issue.
You can use netstat command
netstat --listen
To display open ports and established TCP connections,
netstat -vatn
To display only open UDP ports try the following command:
netstat -vaun
Use JavaScript (screen.width
and screen.height
IIRC, but I may be wrong, haven't done JS in a while). PHP cannot do it.
You want to use regexp_substr()
for this. This should work for your example:
select regexp_substr(val, '[^/]+/[^/]+', 1, 1) as part1,
regexp_substr(val, '[^/]+$', 1, 1) as part2
from (select 'F/P/O' as val from dual) t
Here, by the way, is the SQL Fiddle.
Oops. I missed the part of the question where it says the last delimiter. For that, we can use regex_replace()
for the first part:
select regexp_replace(val, '/[^/]+$', '', 1, 1) as part1,
regexp_substr(val, '[^/]+$', 1, 1) as part2
from (select 'F/P/O' as val from dual) t
And here is this corresponding SQL Fiddle.
If you're simply looking for a way to display it, you could use describe():
grp = df.groupby['colName']
grp.describe()
This gives you a neat table.
Here's a more concise approach...
df['a_bsum'] = df.groupby('A')['B'].transform(sum)
df.sort(['a_bsum','C'], ascending=[True, False]).drop('a_bsum', axis=1)
The first line adds a column to the data frame with the groupwise sum. The second line performs the sort and then removes the extra column.
Result:
A B C
5 baz -2.301539 True
2 baz -0.528172 False
1 bar -0.611756 True
4 bar 0.865408 False
3 foo -1.072969 True
0 foo 1.624345 False
NOTE: sort
is deprecated, use sort_values
instead
The code commented works as well, just choose which do you prefer
import numpy as np
from PIL import Image
def convert_from_cv2_to_image(img: np.ndarray) -> Image:
# return Image.fromarray(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))
return Image.fromarray(img)
def convert_from_image_to_cv2(img: Image) -> np.ndarray:
# return cv2.cvtColor(numpy.array(img), cv2.COLOR_RGB2BGR)
return np.asarray(img)
A tag is used to label and mark a specific commit in the history.
It is usually used to mark release points (eg. v1.0, etc.).
Although a tag may appear similar to a branch, a tag, however, does not change. It points directly to a specific commit in the history and will not change unless explicitly updated.
You will not be able to checkout the tags if it's not locally in your repository so first, you have to fetch
the tags to your local repository.
First, make sure that the tag exists locally by doing
# --all will fetch all the remotes.
# --tags will fetch all tags as well
$ git fetch --all --tags --prune
Then check out the tag by running
$ git checkout tags/<tag_name> -b <branch_name>
Instead of origin
use the tags/
prefix.
In this sample you have 2 tags version 1.0 & version 1.1 you can check them out with any of the following:
$ git checkout A ...
$ git checkout version 1.0 ...
$ git checkout tags/version 1.0 ...
All of the above will do the same since the tag is only a pointer to a given commit.
origin: https://backlog.com/git-tutorial/img/post/stepup/capture_stepup4_1_1.png
# list all tags
$ git tag
# list all tags with given pattern ex: v-
$ git tag --list 'v-*'
There are 2 ways to create a tag:
# lightweight tag
$ git tag
# annotated tag
$ git tag -a
The difference between the 2 is that when creating an annotated tag you can add metadata as you have in a git commit:
name, e-mail, date, comment & signature
$ git tag -d <tag_name>
Deleted tag <tag_name> (was 000000)
Note: If you try to delete a non existig Git tag, there will be see the following error:
$ git tag -d <tag_name>
error: tag '<tag_name>' not found.
# Delete a tag from the server with push tags
$ git push --delete origin <tag name>
In order to grab the content of a given tag, you can use the checkout
command. As explained above tags are like any other commits so we can use checkout
and instead of using the SHA-1 simply replacing it with the tag_name
Option 1:
# Update the local git repo with the latest tags from all remotes
$ git fetch --all
# checkout the specific tag
$ git checkout tags/<tag> -b <branch>
Option 2:
Since git supports shallow clone by adding the --branch
to the clone command we can use the tag name instead of the branch name. Git knows how to "translate" the given SHA-1 to the relevant commit
# Clone a specific tag name using git clone
$ git clone <url> --branch=<tag_name>
git clone --branch=
--branch
can also take tags and detaches the HEAD at that commit in the resulting repository.
git push --tags
To push all tags:
# Push all tags
$ git push --tags
refs/tags
instead of just specifying the <tagname>
.Why?
refs/tags
since sometimes tags can have the same name as your branches and a simple git push will push the branch instead of the tagTo push annotated tags and current history chain tags use:
git push --follow-tags
This flag --follow-tags
pushes both commits and only tags that are both:
From Git 2.4 you can set it using configuration
$ git config --global push.followTags true
The style
property lets you specify values for CSS properties.
The CSS width
property takes a length as its value.
Lengths require units. In quirks mode, browsers tend to assume pixels if provided with an integer instead of a length. Specify units.
e1.style.width = "400px";
print date('H:i');
You have to set the correct timezone in php.ini
.
Look for these lines:
[Date]
; Defines the default timezone used by the date functions
;date.timezone =
It will be something like :
date.timezone ="Europe/Lisbon"
Don't forget to restart your webserver.
Apart from accepted answer, following is also valid
Model.find()
can accept array of ids, and will return all records which matches.
Model.find_by_id(123)
also accept array but will only process first id value present in array
Model.find([1,2,3])
Model.find_by_id([1,2,3])
Can't tell you how many times this has caught. me.
Guid myGuid = Guid.NewGuid();
Simpler and a Standard solution to increment the number and to retain the dot at the end. Even if you get the css right, it will not work if your HTML is not correct. see below.
ol {
counter-reset: item;
}
ol li {
display: block;
}
ol li:before {
content: counters(item, ". ") ". ";
counter-increment: item;
}
ol {
counter-reset: item;
li {
display: block;
&:before {
content: counters(item, ". ") ". ";
counter-increment: item
}
}
}
If you add the child make sure the it is under the parent li
.
<!-- WRONG -->
<ol>
<li>Parent 1</li> <!-- Parent is Individual. Not hugging -->
<ol>
<li>Child</li>
</ol>
<li>Parent 2</li>
</ol>
<!-- RIGHT -->
<ol>
<li>Parent 1
<ol>
<li>Child</li>
</ol>
</li> <!-- Parent is Hugging the child -->
<li>Parent 2</li>
</ol>
(Note: An official API was added in API 14: See this answer https://stackoverflow.com/a/29786451/119733)
DO NOT USE PREVIOUS (waqas716) answer.
You will have memory leak problem, because of the static reference to the activity. For more detail see the following link http://android-developers.blogspot.fr/2009/01/avoiding-memory-leaks.html
To avoid this, you should manage activities references. Add the name of the application in the manifest file:
<application
android:name=".MyApp"
....
</application>
Your application class :
public class MyApp extends Application {
public void onCreate() {
super.onCreate();
}
private Activity mCurrentActivity = null;
public Activity getCurrentActivity(){
return mCurrentActivity;
}
public void setCurrentActivity(Activity mCurrentActivity){
this.mCurrentActivity = mCurrentActivity;
}
}
Create a new Activity :
public class MyBaseActivity extends Activity {
protected MyApp mMyApp;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mMyApp = (MyApp)this.getApplicationContext();
}
protected void onResume() {
super.onResume();
mMyApp.setCurrentActivity(this);
}
protected void onPause() {
clearReferences();
super.onPause();
}
protected void onDestroy() {
clearReferences();
super.onDestroy();
}
private void clearReferences(){
Activity currActivity = mMyApp.getCurrentActivity();
if (this.equals(currActivity))
mMyApp.setCurrentActivity(null);
}
}
So, now instead of extending Activity class for your activities, just extend MyBaseActivity. Now, you can get your current activity from application or Activity context like that :
Activity currentActivity = ((MyApp)context.getApplicationContext()).getCurrentActivity();
C# has a lot of reference types. Even if a container stores the references contiguously, the objects themselves may be scattered through the heap
You have to call next()
before you can start reading values from the first row. beforeFirst
puts the cursor before the first row, so there's no data to read.
Almost all Oracle deployments are done through SQL*Plus (that weird little command line tool that your DBA uses). And in SQL*Plus a lone slash basically means "re-execute last SQL or PL/SQL command that I just executed".
See
Rule of thumb would be to use slash with things that do BEGIN .. END
or where you can use CREATE OR REPLACE
.
For inserts that need to be unique use
INSERT INTO my_table ()
SELECT <values to be inserted>
FROM dual
WHERE NOT EXISTS (SELECT
FROM my_table
WHERE <identify data that you are trying to insert>)
I had this problem while working with Pycharm and with a database that was originally given to me by another user.
So, this is how I solve it in my case:
Just do:
document.body.innerHTML = document.body.innerHTML + '<img src="../images/loaded.gif" alt="" onload="alert(\'test\');this.parentNode.removeChild(this);" />';
The pass statement does nothing. It can be used when a statement is required syntactically but the program requires no action.
According to Flexbugs:
In IE 10-11,
min-height
declarations on flex containers work to size the containers themselves, but their flex item children do not seem to know the size of their parents. They act as if no height has been set at all.
Here are a couple of workarounds:
<aside>
and <section>
:html {
height: 100%;
}
body {
display: flex;
flex-direction: column;
height: 100%;
margin: 0;
}
header,
footer {
background: #7092bf;
}
main {
flex: 1;
display: flex;
}
aside, section {
overflow: auto;
}
aside {
flex: 0 0 150px;
background: #3e48cc;
}
section {
flex: 1;
background: #9ad9ea;
}
_x000D_
<header>
<p>header</p>
</header>
<main>
<aside>
<p>aside</p>
</aside>
<section>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
</section>
</main>
<footer>
<p>footer</p>
</footer>
_x000D_
html {
height: 100%;
}
body {
display: flex;
flex-direction: column;
height: 100%;
margin: 0;
}
header,
footer {
background: #7092bf;
}
main {
flex: 1 0 auto;
display: flex;
}
aside {
flex: 0 0 150px;
background: #3e48cc;
}
section {
flex: 1;
background: #9ad9ea;
}
_x000D_
<header>
<p>header</p>
</header>
<main>
<aside>
<p>aside</p>
</aside>
<section>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
</section>
</main>
<footer>
<p>footer</p>
</footer>
_x000D_
$total = count($_FILES['txt_gallery']['name']);
$filename_arr = [];
$filename_arr1 = [];
for( $i=0 ; $i < $total ; $i++ ) {
$tmpFilePath = $_FILES['txt_gallery']['tmp_name'][$i];
if ($tmpFilePath != ""){
$newFilePath = "../uploaded/" .date('Ymdhis').$i.$_FILES['txt_gallery']['name'][$i];
$newFilePath1 = date('Ymdhis').$i.$_FILES['txt_gallery']['name'][$i];
if(move_uploaded_file($tmpFilePath, $newFilePath)) {
$filename_arr[] = $newFilePath;
$filename_arr1[] = $newFilePath1;
}
}
}
$file_names = implode(',', $filename_arr1);
var_dump($file_names); exit;
Dictionaries are unordered in Python versions up to and including Python 3.6. If you do not care about the order of the entries and want to access the keys or values by index anyway, you can use d.keys()[i]
and d.values()[i]
or d.items()[i]
. (Note that these methods create a list of all keys, values or items in Python 2.x. So if you need them more then once, store the list in a variable to improve performance.)
If you do care about the order of the entries, starting with Python 2.7 you can use collections.OrderedDict
. Or use a list of pairs
l = [("blue", "5"), ("red", "6"), ("yellow", "8")]
if you don't need access by key. (Why are your numbers strings by the way?)
In Python 3.7, normal dictionaries are ordered, so you don't need to use OrderedDict
anymore (but you still can – it's basically the same type). The CPython implementation of Python 3.6 already included that change, but since it's not part of the language specification, you can't rely on it in Python 3.6.
Open the Console view, locate the console for your running app and hit the Big Red Button.
Alternatively if you open the Debug perspective you will see all running apps in (by default) the top left. You can select the one that's causing you grief and once again hit the Big Red Button.
Use these Kotlin extensions:
/**
* Converts Pixel to DP.
*/
val Int.pxToDp: Int
get() = (this / Resources.getSystem().displayMetrics.density).toInt()
/**
* Converts DP to Pixel.
*/
val Int.dpToPx: Int
get() = (this * Resources.getSystem().displayMetrics.density).toInt()
For my case none of the suggestions worked. I'm on Windows and this worked for me:
git remote add foo //SERVERNAME/path/to/copied/git
)git push foo master
. Did it worked? Great! Now delete not-working repo and rename this into whatever it was before. Make sure permissions and share property remains the same. The json.load()
method (without "s" in "load") can read a file directly:
import json
with open('strings.json') as f:
d = json.load(f)
print(d)
You were using the json.loads()
method, which is used for string arguments only.
Edit: The new message is a totally different problem. In that case, there is some invalid json in that file. For that, I would recommend running the file through a json validator.
There are also solutions for fixing json like for example How do I automatically fix an invalid JSON string?.
Use these two step in console :
git commit --amend -m "new commit message"
and then
git push -f
Done :)
You were very close, you can use this:
DELETE FROM table WHERE (col1,col2) IN ((1,2),(3,4),(5,6))
Please see this fiddle.
For more info refer this: SQL Server Date Formats
[MM/DD/YYYY]
SELECT CONVERT(VARCHAR(10), cast(dt_col as date), 101) from tbl
[DD/MM/YYYY]
SELECT CONVERT(VARCHAR(10), cast(dt_col as date), 103) from tbl
I know this thread is old and there are already comprehensive answers.
Just in case you don't know this:
<meta http-equiv="X-UA-Compatible" content="IE=edge" >
You don't have to hardcode IE version number as
<meta http-equiv="X-UA-Compatible" content="IE=9" >
You should know more about java.lang.Math.max
:
java.lang.Math.max(arg1,arg2)
only accepts 2 arguments but you are
writing 3 arguments in your code.double
,int
,long
and float
but your are
writing String
arguments in Math.max function. You need to parse them in the required type.You code will produce compile time error because of above mismatches.
Try following updated code, that will solve your purpose:
import java.lang.Math;
import java.util.Scanner;
public class max {
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
System.out.println("Please input 3 integers: ");
int x = Integer.parseInt(keyboard.nextLine());
int y = Integer.parseInt(keyboard.nextLine());
int z = Integer.parseInt(keyboard.nextLine());
int max = Math.max(x,y);
if(max>y){ //suppose x is max then compare x with z to find max number
max = Math.max(x,z);
}
else{ //if y is max then compare y with z to find max number
max = Math.max(y,z);
}
System.out.println("The max of three is: " + max);
}
}
public static Stream ToStream(this Image image)
{
var stream = new MemoryStream();
image.Save(stream, image.RawFormat);
stream.Position = 0;
return stream;
}
From your question, I think what you are trying to do is to store something (an object, a string...) to foward it then to another servlet, using RequestDispatcher(). To do this you don't need to set a paramater but an attribute using
void setAttribute(String name, Object o);
and then
Object getAttribute(String name);
from __future__ import print_function
log = open("s_output.csv", "w",encoding="utf-8")
for i in range(0,10):
print('\nHeadline: '+l1[i], file = log)
Please add encoding="utf-8"
so as to avoid the error of " 'charmap' codec can't encode characters in position 12-32: character maps to "
Something like this:
array.sort(function(a, b){
var nameA=a.name.toLowerCase(), nameB=b.name.toLowerCase();
if (nameA < nameB) //sort string ascending
return -1;
if (nameA > nameB)
return 1;
return 0; //default return value (no sorting)
});
You can search for "Anaconda prompt" in installed programs and run it.
When it opens, it shows the directory anaconda is working from.
As you can see c:\programdata\anaconda2 is my installed directory.
*side note: programdata folder is hidden in windows so you'll have to enter its path in the folder explorer to access it.
As others have commented, classnames utility is the currently recommended approach to handle conditional CSS class names in ReactJs.
In your case, the solution will look like:
var btnGroupClasses = classNames(
'btn-group',
'pull-right',
{
'show': this.props.showBulkActions,
'hidden': !this.props.showBulkActions
}
);
...
<div className={btnGroupClasses}>...</div>
As a side note, I would suggest you to try to avoid using both show
and hidden
classes, so the code could be simpler. Most likely you don't need to set a class for something to be shown by default.
Yes, there is a command to find the size of a database in Postgres. It's the following:
SELECT pg_database.datname as "database_name", pg_size_pretty(pg_database_size(pg_database.datname)) AS size_in_mb FROM pg_database ORDER by size_in_mb DESC;
easiest way to clear form
<form #myForm="ngForm" (submit)="addPost();"> ... </form>
then in .ts file you need to access local variable of template i.e
@ViewChild('myForm') mytemplateForm : ngForm; //import { NgForm } from '@angular/forms';
for resetting values and state(pristine,touched..) do the following
addPost(){
this.newPost = {
title: this.mytemplateForm.value.title,
body: this.mytemplateForm.value.body
}
this._postService.addPost(this.newPost);
this.mytemplateForm.reset(); }
This is most cleanest way to clear the form
var temp="/yourapp/";
$(location).attr('href','http://abcd.com'+temp);
Try this... used as an alternative
The simplest approach is, to provide a sort selector (Apple's documentation for details)
Objective-C
sortedArray = [anArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
Swift
let descriptor: NSSortDescriptor = NSSortDescriptor(key: "YourKey", ascending: true, selector: "localizedCaseInsensitiveCompare:")
let sortedResults: NSArray = temparray.sortedArrayUsingDescriptors([descriptor])
Apple provides several selectors for alphabetic sorting:
compare:
caseInsensitiveCompare:
localizedCompare:
localizedCaseInsensitiveCompare:
localizedStandardCompare:
Swift
var students = ["Kofi", "Abena", "Peter", "Kweku", "Akosua"]
students.sort()
print(students)
// Prints "["Abena", "Akosua", "Kofi", "Kweku", "Peter"]"
PERMISSIONS: I want to stress the importance of permissions for "sqlplus".
For any "Other" UNIX user other than the Owner/Group to be able to run sqlplus and access an ORACLE database , read/execute permissions are required (rx) for these 4 directories :
$ORACLE_HOME/bin , $ORACLE_HOME/lib, $ORACLE_HOME/oracore, $ORACLE_HOME/sqlplus
Environment. Set those properly:
A. ORACLE_HOME
(example: ORACLE_HOME=/u01/app/oranpgm/product/12.1.0/PRMNRDEV/
)
B. LD_LIBRARY_PATH
(example: ORACLE_HOME=/u01/app/oranpgm/product/12.1.0/PRMNRDEV/lib
)
C. ORACLE_SID
D. PATH
export PATH="$ORACLE_HOME/bin:$PATH"
Just Javascript (as requested)
Add this function somewhere on your page (preferably in the <head>
)
function clearBox(elementID)
{
document.getElementById(elementID).innerHTML = "";
}
Then add the button on click event:
<button onclick="clearBox('cart_item')" />
In JQuery (for reference)
If you prefer JQuery you could do:
$("#cart_item").html("");
On windows if you have git installed through cygwin (open up cygwin and type git --version
to check) then the path will most likely be something like C:\cygwin64\bin\git.exe
I tried the following solution with the UITextArea and I expect this will work with UIButton as well.
First of all import this in your .m file -
#import <QuartzCore/QuartzCore.h>
and then in your loadView
method add following lines
yourButton.layer.cornerRadius = 10; // this value vary as per your desire
yourButton.clipsToBounds = YES;
Now that the new anaconda individual edition 2020 distribution is out, the procedure that follows is working:
Update conda in your base env:
conda update conda
Create a new environment for Python 3.8, specifying anaconda for the full distribution specification, not just the minimal environment:
conda create -n py38 python=3.8 anaconda
Activate the new environment:
conda activate py38
python --version
Python 3.8.1
Number of packages installed: 303
Or you can do:
conda create -n py38 anaconda=2020.02 python=3.8
--> UPDATE: Finally, Anaconda3-2020.07 is out with core Python 3.8.3
You can download Anaconda with Python 3.8 from https://www.anaconda.com/products/individual
you can easily disable any process running on port 80 and then run this command
flask run --host 0.0.0.0 --port 80
or if u prefer running it within the .py file
if __name__ == "__main__":
app.run(host=0.0.0.0, port=80)
grep -e apple your_site_root/**/*.* -s -l | xargs sed -i "" "s|apple|orage|"
This problem is related to the mergesort algorithm, in which two sorted sub-arrays are combined into a single sorted sub-array. The CLRS book gives an example of the algorithm and cleans up the need for checking if the end has been reached by adding a sentinel value (something that compares and "greater than any other value") to the end of each array.
I wrote this in Python, but it should translate nicely to Java too:
def func(a, b):
class sentinel(object):
def __lt__(*_):
return False
ax, bx, c = a[:] + [sentinel()], b[:] + [sentinel()], []
i, j = 0, 0
for k in range(len(a) + len(b)):
if ax[i] < bx[j]:
c.append(ax[i])
i += 1
else:
c.append(bx[j])
j += 1
return c
The SQL standard way to implement recursive queries, as implemented e.g. by IBM DB2 and SQL Server, is the WITH
clause. See this article for one example of translating a CONNECT BY
into a WITH
(technically a recursive CTE) -- the example is for DB2 but I believe it will work on SQL Server as well.
Edit: apparently the original querant requires a specific example, here's one from the IBM site whose URL I already gave. Given a table:
CREATE TABLE emp(empid INTEGER NOT NULL PRIMARY KEY,
name VARCHAR(10),
salary DECIMAL(9, 2),
mgrid INTEGER);
where mgrid
references an employee's manager's empid
, the task is, get the names of everybody who reports directly or indirectly to Joan
. In Oracle, that's a simple CONNECT
:
SELECT name
FROM emp
START WITH name = 'Joan'
CONNECT BY PRIOR empid = mgrid
In SQL Server, IBM DB2, or PostgreSQL 8.4 (as well as in the SQL standard, for what that's worth;-), the perfectly equivalent solution is instead a recursive query (more complex syntax, but, actually, even more power and flexibility):
WITH n(empid, name) AS
(SELECT empid, name
FROM emp
WHERE name = 'Joan'
UNION ALL
SELECT nplus1.empid, nplus1.name
FROM emp as nplus1, n
WHERE n.empid = nplus1.mgrid)
SELECT name FROM n
Oracle's START WITH
clause becomes the first nested SELECT
, the base case of the recursion, to be UNION
ed with the recursive part which is just another SELECT
.
SQL Server's specific flavor of WITH
is of course documented on MSDN, which also gives guidelines and limitations for using this keyword, as well as several examples.
From Python documentation -> 8.3 Handling Exceptions:
A
try
statement may have more than one except clause, to specify handlers for different exceptions. At most one handler will be executed. Handlers only handle exceptions that occur in the corresponding try clause, not in other handlers of the same try statement. An except clause may name multiple exceptions as a parenthesized tuple, for example:except (RuntimeError, TypeError, NameError): pass
Note that the parentheses around this tuple are required, because except
ValueError, e:
was the syntax used for what is normally written asexcept ValueError as e:
in modern Python (described below). The old syntax is still supported for backwards compatibility. This meansexcept RuntimeError, TypeError
is not equivalent toexcept (RuntimeError, TypeError):
but toexcept RuntimeError as
TypeError:
which is not what you want.
The CSS table model is based on the HTML table model http://www.w3.org/TR/CSS21/tables.html
A table is divided into ROWS, and each row contains one or more cells. Cells are children of ROWS, they are NEVER children of columns.
"display: table-column" does NOT provide a mechanism for making columnar layouts (e.g. newspaper pages with multiple columns, where content can flow from one column to the next).
Rather, "table-column" ONLY sets attributes that apply to corresponding cells within the rows of a table. E.g. "The background color of the first cell in each row is green" can be described.
The table itself is always structured the same way it is in HTML.
In HTML (observe that "td"s are inside "tr"s, NOT inside "col"s):
<table ..>
<col .. />
<col .. />
<tr ..>
<td ..></td>
<td ..></td>
</tr>
<tr ..>
<td ..></td>
<td ..></td>
</tr>
</table>
Corresponding HTML using CSS table properties (Note that the "column" divs do not contain any contents -- the standard does not allow for contents directly in columns):
.mytable {_x000D_
display: table;_x000D_
}_x000D_
.myrow {_x000D_
display: table-row;_x000D_
}_x000D_
.mycell {_x000D_
display: table-cell;_x000D_
}_x000D_
.column1 {_x000D_
display: table-column;_x000D_
background-color: green;_x000D_
}_x000D_
.column2 {_x000D_
display: table-column;_x000D_
}
_x000D_
<div class="mytable">_x000D_
<div class="column1"></div>_x000D_
<div class="column2"></div>_x000D_
<div class="myrow">_x000D_
<div class="mycell">contents of first cell in row 1</div>_x000D_
<div class="mycell">contents of second cell in row 1</div>_x000D_
</div>_x000D_
<div class="myrow">_x000D_
<div class="mycell">contents of first cell in row 2</div>_x000D_
<div class="mycell">contents of second cell in row 2</div>_x000D_
</div>_x000D_
</div>
_x000D_
OPTIONAL: both "rows" and "columns" can be styled by assigning multiple classes to each row and cell as follows. This approach gives maximum flexibility in specifying various sets of cells, or individual cells, to be styled:
//Useful css declarations, depending on what you want to affect, include:_x000D_
_x000D_
/* all cells (that have "class=mycell") */_x000D_
.mycell {_x000D_
}_x000D_
_x000D_
/* class row1, wherever it is used */_x000D_
.row1 {_x000D_
}_x000D_
_x000D_
/* all the cells of row1 (if you've put "class=mycell" on each cell) */_x000D_
.row1 .mycell {_x000D_
}_x000D_
_x000D_
/* cell1 of row1 */_x000D_
.row1 .cell1 {_x000D_
}_x000D_
_x000D_
/* cell1 of all rows */_x000D_
.cell1 {_x000D_
}_x000D_
_x000D_
/* row1 inside class mytable (so can have different tables with different styles) */_x000D_
.mytable .row1 {_x000D_
}_x000D_
_x000D_
/* all the cells of row1 of a mytable */_x000D_
.mytable .row1 .mycell {_x000D_
}_x000D_
_x000D_
/* cell1 of row1 of a mytable */_x000D_
.mytable .row1 .cell1 {_x000D_
}_x000D_
_x000D_
/* cell1 of all rows of a mytable */_x000D_
.mytable .cell1 {_x000D_
}
_x000D_
<div class="mytable">_x000D_
<div class="column1"></div>_x000D_
<div class="column2"></div>_x000D_
<div class="myrow row1">_x000D_
<div class="mycell cell1">contents of first cell in row 1</div>_x000D_
<div class="mycell cell2">contents of second cell in row 1</div>_x000D_
</div>_x000D_
<div class="myrow row2">_x000D_
<div class="mycell cell1">contents of first cell in row 2</div>_x000D_
<div class="mycell cell2">contents of second cell in row 2</div>_x000D_
</div>_x000D_
</div>
_x000D_
In today's flexible designs, which use <div>
for multiple purposes, it is wise to put some class on each div, to help refer to it. Here, what used to be <tr>
in HTML became class myrow
, and <td>
became class mycell
. This convention is what makes the above CSS selectors useful.
PERFORMANCE NOTE: putting class names on each cell, and using the above multi-class selectors, is better performance than using selectors ending with *
, such as .row1 *
or even .row1 > *
. The reason is that selectors are matched last first, so when matching elements are being sought, .row1 *
first does *
, which matches all elements, and then checks all the ancestors of each element, to find if any ancestor has class row1
. This might be slow in a complex document on a slow device. .row1 > *
is better, because only the immediate parent is examined. But it is much better still to immediately eliminate most elements, via .row1 .cell1
. (.row1 > .cell1
is an even tighter spec, but it is the first step of the search that makes the biggest difference, so it usually isn't worth the clutter, and the extra thought process as to whether it will always be a direct child, of adding the child selector >
.)
The key point to take away re performance is that the last item in a selector should be as specific as possible, and should never be *
.
Are you saying that you are having trouble inserting into a web page a link to a file that happens to have a .exe extension?
If that is the case, then take one step back. Imagine the file has a .htm extension, or a .css extension. How can you make that downloadable? If it is a static link, then the answer is clear: the file needs to be in the docroot for the ASP.NET app. IIS + ASP.NET serves up many kinds of content: .htm files, .css files, .js files, image files, implicitly. All these files are somewhere under the docroot, which by default is c:\inetpub\wwwroot, but for your webapp is surely something different. The fact that the file you want to expose has an .exe extension does not change the basic laws of IIS physics. The exe has to live under the docroot. The network share thing might work for some browsers.
The alternative of course is to dynamically write the content of the file directly to the Response.OutputStream. This way you don't need the .exe to be in your docroot, but it is not a direct download link. In this scenario, the file might be downloaded by a button click.
Something like this:
Response.Clear();
string FullPathFilename = "\\\\server\\share\\CorpApp1.exe";
string archiveName= System.IO.Path.GetFileName(FullPathFilename);
Response.ContentType = "application/octet-stream";
Response.AddHeader("content-disposition", "filename=" + archiveName);
Response.TransmitFile(FullPathFilename);
Response.End();
Very old question, but since google led me here I'll add a solution that I found useful:
Step 1. Create a user for each schema you need to be able to use. E.g. "user_myschema"
Step 2. Use EXECUTE AS to execute the SQL statements as the required schema user.
Step 3. Use REVERT to switch back to the original user.
Example: Let's say you have a table "mytable" present in schema "otherschema", which is not your default schema. Running "SELECT * FROM mytable" won't work.
Create a user named "user_otherschema" and set that user's default schema to be "otherschema".
Now you can run this script to interact with the table:
EXECUTE AS USER = 'user_otherschema';
SELECT * FROM mytable
REVERT
The revert statements resets current user, so you are yourself again.
Link to EXECUTE AS documentation: https://docs.microsoft.com/en-us/sql/t-sql/statements/execute-as-transact-sql?view=sql-server-2017
boolean turnedOn;
if(turnedOn)
{
//do stuff when the condition is true - i.e, turnedOn is true
}
else
{
//do stuff when the condition is false - i.e, turnedOn is false
}
git remote add origin [email protected]:User/UserRepo.git
, then a new remote created named origin
.git remote set-url origin [email protected]:User/UserRepo.git
,git searches for existing remote having name origin
and change it's remote repository url. If git unable to find any remote having name origin
, It raise an error fatal: No such remote 'origin'
.If you are going to create a new repository then use git remote add origin [email protected]:User/UserRepo.git
to add remote.
The variation of the context processor I use is:
from django.contrib.sites.shortcuts import get_current_site
from django.utils.functional import SimpleLazyObject
def site(request):
return {
'site': SimpleLazyObject(lambda: get_current_site(request)),
}
The SimpleLazyObject
wrapper makes sure the DB call only happens when the template actually uses the site
object. This removes the query from the admin pages. It also caches the result.
and include it in the settings:
TEMPLATE_CONTEXT_PROCESSORS = (
...
"module.context_processors.site",
....
)
In the template, you can use {{ site.domain }}
to get the current domain name.
edit: to support protocol switching too, use:
def site(request):
site = SimpleLazyObject(lambda: get_current_site(request))
protocol = 'https' if request.is_secure() else 'http'
return {
'site': site,
'site_root': SimpleLazyObject(lambda: "{0}://{1}".format(protocol, site.domain)),
}
Since this isn't closed, i would like to submit a new entry for anyone looking to have something working properly for them... using an amalgamation of what i found here, as well as using DirectoryServices to debug the code itself and find the proper code to use, here's what i found that works for me in every situation... note that my solution extends DirectoryInfo object... :
public static bool IsReadable(this DirectoryInfo me)
{
AuthorizationRuleCollection rules;
WindowsIdentity identity;
try
{
rules = me.GetAccessControl().GetAccessRules(true, true, typeof(System.Security.Principal.SecurityIdentifier));
identity = WindowsIdentity.GetCurrent();
}
catch (Exception ex)
{ //Posible UnauthorizedAccessException
return false;
}
bool isAllow=false;
string userSID = identity.User.Value;
foreach (FileSystemAccessRule rule in rules)
{
if (rule.IdentityReference.ToString() == userSID || identity.Groups.Contains(rule.IdentityReference))
{
if ((rule.FileSystemRights.HasFlag(FileSystemRights.Read) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadAndExecute) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadData) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadExtendedAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadPermissions)) && rule.AccessControlType == AccessControlType.Deny)
return false;
else if ((rule.FileSystemRights.HasFlag(FileSystemRights.Read) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadAndExecute) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadData) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadExtendedAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.ReadPermissions)) && rule.AccessControlType == AccessControlType.Allow)
isAllow = true;
}
}
return isAllow;
}
public static bool IsWriteable(this DirectoryInfo me)
{
AuthorizationRuleCollection rules;
WindowsIdentity identity;
try
{
rules = me.GetAccessControl().GetAccessRules(true, true, typeof(System.Security.Principal.SecurityIdentifier));
identity = WindowsIdentity.GetCurrent();
}
catch (Exception ex)
{ //Posible UnauthorizedAccessException
return false;
}
bool isAllow = false;
string userSID = identity.User.Value;
foreach (FileSystemAccessRule rule in rules)
{
if (rule.IdentityReference.ToString() == userSID || identity.Groups.Contains(rule.IdentityReference))
{
if ((rule.FileSystemRights.HasFlag(FileSystemRights.Write) ||
rule.FileSystemRights.HasFlag(FileSystemRights.WriteAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.WriteData) ||
rule.FileSystemRights.HasFlag(FileSystemRights.WriteExtendedAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.CreateDirectories) ||
rule.FileSystemRights.HasFlag(FileSystemRights.CreateFiles)) && rule.AccessControlType == AccessControlType.Deny)
return false;
else if ((rule.FileSystemRights.HasFlag(FileSystemRights.Write) ||
rule.FileSystemRights.HasFlag(FileSystemRights.WriteAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.WriteData) ||
rule.FileSystemRights.HasFlag(FileSystemRights.WriteExtendedAttributes) ||
rule.FileSystemRights.HasFlag(FileSystemRights.CreateDirectories) ||
rule.FileSystemRights.HasFlag(FileSystemRights.CreateFiles)) && rule.AccessControlType == AccessControlType.Allow)
isAllow = true;
}
}
return me.IsReadable() && isAllow;
}
IF you #include a file two times in .h files than compiler will give error. But if you #import a file more than once compiler will ignore it.
Object.create(Constructor.prototype)
is the part of new Constructor
new Constructor
implementation// 1. define constructor function
function myConstructor(name, age) {
this.name = name;
this.age = age;
}
myConstructor.prototype.greet = function(){
console.log(this.name, this.age)
};
// 2. new operator implementation
let newOperatorWithConstructor = function(name, age) {
const newInstance = new Object(); // empty object
Object.setPrototypeOf(newInstance, myConstructor.prototype); // set prototype
const bindedConstructor = myConstructor.bind(newInstance); // this binding
bindedConstructor(name, age); // execute binded constructor function
return newInstance; // return instance
};
// 3. produce new instance
const instance = new myConstructor("jun", 28);
const instance2 = newOperatorWithConstructor("jun", 28);
console.log(instance);
console.log(instance2);
new Constructor
implementation contains Object.create
method newOperatorWithConstructor = function(name, age) {
const newInstance = Object.create(myConstructor.prototype); // empty object, prototype chaining
const bindedConstructor = myConstructor.bind(newInstance); // this binding
bindedConstructor(name, age); // execute binded constructor function
return newInstance; // return instance
};
console.log(newOperatorWithConstructor("jun", 28));
So far my understating on void pointer is as follows.
When a pointer variable is declared using keyword void – it becomes a general purpose pointer variable. Address of any variable of any data type (char, int, float etc.)can be assigned to a void pointer variable.
main()
{
int *p;
void *vp;
vp=p;
}
Since other data type pointer can be assigned to void pointer, so I used it in absolut_value(code shown below) function. To make a general function.
#include<stdio.h>
void absolute_value ( void *j) // works if used float, obviously it must work but thats not my interest here.
{
if ( *j < 0 )
*j = *j * (-1);
}
int main()
{
int i = 40;
float f = -40;
printf("print intiger i = %d \n",i);
printf("print float f = %f \n",f);
absolute_value(&i);
absolute_value(&f);
printf("print intiger i = %d \n",i);
printf("print float f = %f \n",f);
return 0;
}
But I was getting error, so I came to know my understanding with void pointer is not correct :(. So now I will move towards to collect points why is that so.
The things that i need to understand more on void pointers is that.
We need to typecast the void pointer variable to dereference it. This is because a void pointer has no data type associated with it. There is no way the compiler can know (or guess?) what type of data is pointed to by the void pointer. So to take the data pointed to by a void pointer we typecast it with the correct type of the data holded inside the void pointers location.
void main()
{
int a=10;
float b=35.75;
void *ptr; // Declaring a void pointer
ptr=&a; // Assigning address of integer to void pointer.
printf("The value of integer variable is= %d",*( (int*) ptr) );// (int*)ptr - is used for type casting. Where as *((int*)ptr) dereferences the typecasted void pointer variable.
ptr=&b; // Assigning address of float to void pointer.
printf("The value of float variable is= %f",*( (float*) ptr) );
}
A void pointer can be really useful if the programmer is not sure about the data type of data inputted by the end user. In such a case the programmer can use a void pointer to point to the location of the unknown data type. The program can be set in such a way to ask the user to inform the type of data and type casting can be performed according to the information inputted by the user. A code snippet is given below.
void funct(void *a, int z)
{
if(z==1)
printf("%d",*(int*)a); // If user inputs 1, then he means the data is an integer and type casting is done accordingly.
else if(z==2)
printf("%c",*(char*)a); // Typecasting for character pointer.
else if(z==3)
printf("%f",*(float*)a); // Typecasting for float pointer
}
Another important point you should keep in mind about void pointers is that – pointer arithmetic can not be performed in a void pointer.
void *ptr;
int a;
ptr=&a;
ptr++; // This statement is invalid and will result in an error because 'ptr' is a void pointer variable.
So now I understood what was my mistake. I am correcting the same.
References :
http://www.antoarts.com/void-pointers-in-c/
http://www.circuitstoday.com/void-pointers-in-c.
The New code is as shown below.
#include<stdio.h>
#define INT 1
#define FLOAT 2
void absolute_value ( void *j, int *n)
{
if ( *n == INT) {
if ( *((int*)j) < 0 )
*((int*)j) = *((int*)j) * (-1);
}
if ( *n == FLOAT ) {
if ( *((float*)j) < 0 )
*((float*)j) = *((float*)j) * (-1);
}
}
int main()
{
int i = 0,n=0;
float f = 0;
printf("Press 1 to enter integer or 2 got float then enter the value to get absolute value\n");
scanf("%d",&n);
printf("\n");
if( n == 1) {
scanf("%d",&i);
printf("value entered before absolute function exec = %d \n",i);
absolute_value(&i,&n);
printf("value entered after absolute function exec = %d \n",i);
}
if( n == 2) {
scanf("%f",&f);
printf("value entered before absolute function exec = %f \n",f);
absolute_value(&f,&n);
printf("value entered after absolute function exec = %f \n",f);
}
else
printf("unknown entry try again\n");
return 0;
}
Thank you,
You can use parseInt with try and catch block
try
{
int myVal= Integer.parseInt(mTextView.getText().toString());
}
catch (NumberFormatException e)
{
// handle the exception
int myVal=0;
}
Or you can create your own tryParse method :
public Integer tryParse(Object obj) {
Integer retVal;
try {
retVal = Integer.parseInt((String) obj);
} catch (NumberFormatException nfe) {
retVal = 0; // or null if that is your preference
}
return retVal;
}
and use it in your code like:
int myVal= tryParse(mTextView.getText().toString());
Note: The following code without try/catch will throw an exception
int myVal= new Integer(mTextView.getText().toString()).intValue();
Or
int myVal= Integer.decode(mTextView.getText().toString()).intValue();