i had this problem :
Installation did not succeed.
The application could not be installed: INSTALL_FAILED_CONFLICTING_PROVIDER
but it was not from provider of manifest the below library in my app has conflict with other app and the others can not be install:
implementation 'com.iceteck.silicompressorr:silicompressor:2.2.1'
Here is my blog post about why we need to use FileProvider and how to use it correctly. Fully updated to the latest versions of Android.
You are going to need to call the SmsManager
class. You are probably going to need to use the STATUS_ON_ICC_READ
constant and maybe put what you get there into your apps local db so that you can keep track of what you have already read vs the new stuff for your app to parse through.
BUT bear in mind that you have to declare the use of the class in your manifest, so users will see that you have access to their SMS called out in the permissions dialogue they get when they install. Seeing SMS access is unusual and could put some users off. Good luck.
Alternatively:
var exception = err as Web2PDFException;
if ( excecption != null )
{
Web2PDFException wex = exception;
....
}
As josh527
said, handler.removeCallbacksAndMessages(null);
can work.
But why?
If you have a look at the source code, you can understand it more clearly.
There are 3 type of method to remove callbacks/messages from handler(the MessageQueue):
Handler.java (leave some overload method)
/**
* Remove any pending posts of Runnable <var>r</var> with Object
* <var>token</var> that are in the message queue. If <var>token</var> is null,
* all callbacks will be removed.
*/
public final void removeCallbacks(Runnable r, Object token)
{
mQueue.removeMessages(this, r, token);
}
/**
* Remove any pending posts of messages with code 'what' and whose obj is
* 'object' that are in the message queue. If <var>object</var> is null,
* all messages will be removed.
*/
public final void removeMessages(int what, Object object) {
mQueue.removeMessages(this, what, object);
}
/**
* Remove any pending posts of callbacks and sent messages whose
* <var>obj</var> is <var>token</var>. If <var>token</var> is null,
* all callbacks and messages will be removed.
*/
public final void removeCallbacksAndMessages(Object token) {
mQueue.removeCallbacksAndMessages(this, token);
}
MessageQueue.java do the real work:
void removeMessages(Handler h, int what, Object object) {
if (h == null) {
return;
}
synchronized (this) {
Message p = mMessages;
// Remove all messages at front.
while (p != null && p.target == h && p.what == what
&& (object == null || p.obj == object)) {
Message n = p.next;
mMessages = n;
p.recycleUnchecked();
p = n;
}
// Remove all messages after front.
while (p != null) {
Message n = p.next;
if (n != null) {
if (n.target == h && n.what == what
&& (object == null || n.obj == object)) {
Message nn = n.next;
n.recycleUnchecked();
p.next = nn;
continue;
}
}
p = n;
}
}
}
void removeMessages(Handler h, Runnable r, Object object) {
if (h == null || r == null) {
return;
}
synchronized (this) {
Message p = mMessages;
// Remove all messages at front.
while (p != null && p.target == h && p.callback == r
&& (object == null || p.obj == object)) {
Message n = p.next;
mMessages = n;
p.recycleUnchecked();
p = n;
}
// Remove all messages after front.
while (p != null) {
Message n = p.next;
if (n != null) {
if (n.target == h && n.callback == r
&& (object == null || n.obj == object)) {
Message nn = n.next;
n.recycleUnchecked();
p.next = nn;
continue;
}
}
p = n;
}
}
}
void removeCallbacksAndMessages(Handler h, Object object) {
if (h == null) {
return;
}
synchronized (this) {
Message p = mMessages;
// Remove all messages at front.
while (p != null && p.target == h
&& (object == null || p.obj == object)) {
Message n = p.next;
mMessages = n;
p.recycleUnchecked();
p = n;
}
// Remove all messages after front.
while (p != null) {
Message n = p.next;
if (n != null) {
if (n.target == h && (object == null || n.obj == object)) {
Message nn = n.next;
n.recycleUnchecked();
p.next = nn;
continue;
}
}
p = n;
}
}
}
@Entity(name = "someThing")
=> this name will be used to identify the domain ..this name will only be identified by hql
queries ..ie ..name of the domain object
@Table(name = "someThing")
=> this name will be used to which table referred by domain object..ie ..name of the table
As second says, most of the "design" decisions made for TeX documents are backed up by well researched usability studies, so changing them should be undertaken with care. It is, however, relatively common to replace Computer Modern with Times (also a serif face).
Try \usepackage{times}
.
nir[0].length
Note 0: You have to have minimum one array in your array.
Note 1: Not all sub-arrays are not necessary the same length.
String Objects
can be checked using JSON.stringify()
trick.
var me = new String("me");
var you = new String("me");
var isEquel = JSON.stringify(me) === JSON.stringify(you);
console.log(isEquel);
_x000D_
head(sort(x),..)
or tail(sort(x),...)
should work
Start with an intent your same activity
and close the activity
.
Intent refresh = new Intent(this, Main.class);
startActivity(refresh);//Start the same Activity
finish(); //finish Activity.
Just to give an alternative solution, because it isn't mentioned.
It's perfectly fine to use the HTML attribute defer
here. So when loading the DOM, a regular <script>
will load when the DOM hits the script. But if we use defer
, then the DOM and the script will load in parallel. The cool thing is the script gets evaluated in the end - when the DOM has loaded (source).
<script src="{% static "build/react.js" %}" defer></script>
If you'd like to use base graphics, you may have a look at this. An extract:
You can correct this with the res= argument to png, which specifies the number of pixels per inch. The smaller this number, the larger the plot area in inches, and the smaller the text relative to the graph itself.
The above method for Visual Studio didn't seem to apply to Visual Studio 2013, but I was able to find the described checkbox using the Project Menu and selecting my project (probably the last item on the submenu) to get to the dialog with the checkbox (on the Build tab).
EDIT: The below implementation proved to have problems on at least some HTC devices (they crashed). For that reason I don't use setclassname and stick with the action chooser menu. I strongly discourage using my old implementation.
Following is the old implementation:
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(youtubelink));
if(Utility.isAppInstalled("com.google.android.youtube", getActivity())) {
intent.setClassName("com.google.android.youtube", "com.google.android.youtube.WatchActivity");
}
startActivity(intent);
Where Utility is my own personal utility class with following methode:
public static boolean isAppInstalled(String uri, Context context) {
PackageManager pm = context.getPackageManager();
boolean installed = false;
try {
pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
installed = true;
} catch (PackageManager.NameNotFoundException e) {
installed = false;
}
return installed;
}
First I check if youtube is installed, if it is installed, I tell android which package I prefer to open my intent.
In my case, I was need to insert a initial value only to tell to user to select an option, so, I do like the code below:
<select ...
<option value="" ng-selected="selected">Select one option</option>
</select>
When I tryed an option with the value != of an empty string (null) the option was substituted by angular, but, when put an option like that (with null value), the select apear with this option.
Sorry by my bad english and I hope that I help in something with this.
I'd the same issue and solved it by inserting an empty input before the datepicker, that steals the focus every time the dialog is opened. This input is hidden on every opening of the dialog and shown again on closing.
Here:
df = df.reset_index()
df.columns[0] = 'New_ID'
df['New_ID'] = df.index + 880
Use the following css:
* {
font: Verdana, Arial, 'sans-serif' !important;/* <-- fonts */
}
The *
-selector means any/all elements, but will obviously be on the bottom of the food chain when it comes to overriding more specific selectors.
Note that the !important
-flag will render the font
-style for *
to be absolute, even if other selectors have been used to set the text (for example, the body
or maybe a p
).
You will need to use ProcessStartInfo
with RedirectStandardOutput
enabled - then you can read the output stream. You might find it easier to use ">" to redirect the output to a file (via the OS), and then simply read the file.
[edit: like what Ray did: +1]
I too had this problem after updating to the latest Xcode Beta. The settings on the simulator are refreshed, so the laptop (external) keyboard was being detected. If you simply press:
iOS Simulator -> Hardware -> Keyboard -> Connect Hardware Keyboard
so that the entry is UNchecked then the software keyboard will be displayed once again.
Yes, you can find out element by data attribute.
element = $('a[data-item-id="stand-out"]');
If you don't need it to be human-readable/editable, the easiest solution is to just use pickle
.
To write:
with open(the_filename, 'wb') as f:
pickle.dump(my_list, f)
To read:
with open(the_filename, 'rb') as f:
my_list = pickle.load(f)
If you do need them to be human-readable, we need more information.
If my_list
is guaranteed to be a list of strings with no embedded newlines, just write them one per line:
with open(the_filename, 'w') as f:
for s in my_list:
f.write(s + '\n')
with open(the_filename, 'r') as f:
my_list = [line.rstrip('\n') for line in f]
If they're Unicode strings rather than byte strings, you'll want to encode
them. (Or, worse, if they're byte strings, but not necessarily in the same encoding as your system default.)
If they might have newlines, or non-printable characters, etc., you can use escaping or quoting. Python has a variety of different kinds of escaping built into the stdlib.
Let's use unicode-escape
here to solve both of the above problems at once:
with open(the_filename, 'w') as f:
for s in my_list:
f.write((s + u'\n').encode('unicode-escape'))
with open(the_filename, 'r') as f:
my_list = [line.decode('unicode-escape').rstrip(u'\n') for line in f]
You can also use the 3.x-style solution in 2.x, with either the codecs
module or the io
module:*
import io
with io.open(the_filename, 'w', encoding='unicode-escape') as f:
f.writelines(line + u'\n' for line in my_list)
with open(the_filename, 'r') as f:
my_list = [line.rstrip(u'\n') for line in f]
* TOOWTDI, so which is the one obvious way? It depends… For the short version: if you need to work with Python versions before 2.6, use codecs
; if not, use io
.
Thanks Burhan Khalid. Your advice to make a a soft link make my installation finally work.
To recap:
You need both the basic version and the SDK version of instant client
You need to set both LD_LIBRARY_PATH and ORACLE_HOME
None of this is documented anywhere, which is quite unbelievable and quite frustrating. I spent over 3 hours yesterday with failed builds because I didn't know to create a soft link.
You can get it in one line with powershell and batch file :
@echo off
Powershell /command "Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Select-Object DisplayName, DisplayVersion, Publisher, InstallDate | Format-List"
Pause
here is a pure-javascript, minimalistic approach. I use JQuery but you can use any library (or even no libraries at all).
<html>
<head>
<title>An example</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
function call_counter(url, pk) {
window.open(url);
$.get('YOUR_VIEW_HERE/'+pk+'/', function (data) {
alert("counter updated!");
});
}
</script>
</head>
<body>
<button onclick="call_counter('http://www.google.com', 12345);">
I update object 12345
</button>
<button onclick="call_counter('http://www.yahoo.com', 999);">
I update object 999
</button>
</body>
</html>
Alternative approach
Instead of placing the JavaScript code, you can change your link in this way:
<a target="_blank"
class="btn btn-info pull-right"
href="{% url YOUR_VIEW column_3_item.pk %}/?next={{column_3_item.link_for_item|urlencode:''}}">
Check It Out
</a>
and in your views.py
:
def YOUR_VIEW_DEF(request, pk):
YOUR_OBJECT.objects.filter(pk=pk).update(views=F('views')+1)
return HttpResponseRedirect(request.GET.get('next')))
nowadays,2017-12-17. I don't find any description about Font-property-order‘s necessity in spec. And I test in chrome always works whatever the order is.
@font-face {
font-family: 'Font Awesome 5 Free';
font-weight: 900;
src: url('#{$fa-font-path}/fa-solid-900.eot');
src: url('#{$fa-font-path}/fa-solid-900.eot?#iefix') format('embedded-opentype'),
url('#{$fa-font-path}/fa-solid-900.woff2') format('woff2'),
url('#{$fa-font-path}/fa-solid-900.woff') format('woff'),
url('#{$fa-font-path}/fa-solid-900.ttf') format('truetype'),
url('#{$fa-font-path}/fa-solid-900.svg#fontawesome') format('svg');
}
@font-face {
font-family: 'Font Awesome 5 Free';
font-weight: 400;
src: url('#{$fa-font-path}/fa-regular-400.eot');
src: url('#{$fa-font-path}/fa-regular-400.eot?#iefix') format('embedded-opentype'),
url('#{$fa-font-path}/fa-regular-400.woff2') format('woff2'),
url('#{$fa-font-path}/fa-regular-400.woff') format('woff'),
url('#{$fa-font-path}/fa-regular-400.ttf') format('truetype'),
url('#{$fa-font-path}/fa-regular-400.svg#fontawesome') format('svg');
}
Agree with all above answers of using MutableList but you can also add/remove from List and get a new list as below.
val newListWithElement = existingList + listOf(element)
val newListMinusElement = existingList - listOf(element)
Or
val newListWithElement = existingList.plus(element)
val newListMinusElement = existingList.minus(element)
Assuming the ID is unique:
var result = xmldoc.Element("Customers")
.Elements("Customer")
.Single(x => (int?)x.Attribute("ID") == 2);
You could also use First
, FirstOrDefault
, SingleOrDefault
or Where
, instead of Single
for different circumstances.
From my experience I'm telling you that BIT has problems on linux OS types(Ubuntu for ex). I developped my db on windows and after I deployed everything on linux, I had problems with queries that inserted or selected from tables that had BIT DATA TYPE.
Bit is not safe for now. I changed to tinyint(1) and worked perfectly. I mean that you only need a value to diferentiate if it's 1 or 0 and tinyint(1) it's ok for that
to_date()
returns a date at 00:00:00, so you need to "remove" the minutes from the date you are comparing to:
select *
from table
where trunc(es_date) = TO_DATE('27-APR-12','dd-MON-yy')
You probably want to create an index on trunc(es_date)
if that is something you are doing on a regular basis.
The literal '27-APR-12'
can fail very easily if the default date format is changed to anything different. So make sure you you always use to_date()
with a proper format mask (or an ANSI literal: date '2012-04-27'
)
Although you did right in using to_date()
and not relying on implict data type conversion, your usage of to_date() still has a subtle pitfall because of the format 'dd-MON-yy'
.
With a different language setting this might easily fail e.g. TO_DATE('27-MAY-12','dd-MON-yy')
when NLS_LANG is set to german. Avoid anything in the format that might be different in a different language. Using a four digit year and only numbers e.g. 'dd-mm-yyyy'
or 'yyyy-mm-dd'
You can use QPalette, however you must set setAutoFillBackground(true);
to enable background color
QPalette sample_palette;
sample_palette.setColor(QPalette::Window, Qt::white);
sample_palette.setColor(QPalette::WindowText, Qt::blue);
sample_label->setAutoFillBackground(true);
sample_label->setPalette(sample_palette);
sample_label->setText("What ever text");
It works fine on Windows and Ubuntu, I haven't played with any other OS.
Note: Please see QPalette, color role section for more details
If you are facing the "This certificate has an invalid issuer" error for all your certificates then do the following steps.
Steps:
Reference:
Just a simple folder drill down.
sub sample()
Dim FileSystem As Object
Dim HostFolder As String
HostFolder = "C:\"
Set FileSystem = CreateObject("Scripting.FileSystemObject")
DoFolder FileSystem.GetFolder(HostFolder)
end sub
Sub DoFolder(Folder)
Dim SubFolder
For Each SubFolder In Folder.SubFolders
DoFolder SubFolder
Next
Dim File
For Each File In Folder.Files
' Operate on each file
Next
End Sub
In Scala,
val ticks = "'([^']*)'".r
ticks findFirstIn mydata match {
case Some(ticks(inside)) => println(inside)
case _ => println("nothing")
}
for (ticks(inside) <- ticks findAllIn mydata) println(inside) // multiple matches
val Some(ticks(inside)) = ticks findFirstIn mydata // may throw exception
val ticks = ".*'([^']*)'.*".r
val ticks(inside) = mydata // safe, shorter, only gets the first set of ticks
Lucups, Floris is right, but you comment that this didn't solve your problem. I ran into the same symptoms, where mysql (mariadb) will not accept the blank password it should accept, and '/var/lib/mysql' does not exist.
I found that this Moonpoint.com page was on-point. Perhaps, like me, you tried to start the mysqld service instead of the mariadb service. Try:
systemctl start mariadb.service
systemctl status mysqld service
Followed by the usual:
mysql_secure_installation
byte[] byteArray = new byte[102400];
base64String = Base64.encode(byteArray);
That code will encode 102400 bytes, no matter how much data you actually use in the array.
while ((bytesRead = fis.read(byteArray)) != -1)
You need to use the value of bytesRead somewhere.
Also, this may not read the whole file into the array in one go (it only reads as much as is in the I/O buffer), so your loop will probably not work, you may end up with half an image in your array.
I'd use Apache Commons IOUtils here:
Base64.encode(FileUtils.readFileToByteArray(file));
Plain form, without regex:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
if (substr($str, 0, strlen($prefix)) == $prefix) {
$str = substr($str, strlen($prefix));
}
Takes: 0.0369 ms (0.000,036,954 seconds)
And with:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
$str = preg_replace('/^' . preg_quote($prefix, '/') . '/', '', $str);
Takes: 0.1749 ms (0.000,174,999 seconds) the 1st run (compiling), and 0.0510 ms (0.000,051,021 seconds) after.
Profiled on my server, obviously.
Cause for the error according to the Java [8] Platform, Standard Edition Troubleshooting Guide: (emphasis and line breaks added)
[...] "GC overhead limit exceeded" indicates that the garbage collector is running all the time and Java program is making very slow progress.
After a garbage collection, if the Java process is spending more than approximately 98% of its time doing garbage collection and if it is recovering less than 2% of the heap and has been doing so far the last 5 (compile time constant) consecutive garbage collections, then a
java.lang.OutOfMemoryError
is thrown. [...]
Apart from setting heap memory with -Xms1g -Xmx2g
, try
-XX:+UseG1GC -XX:G1HeapRegionSize=n -XX:MaxGCPauseMillis=m
-XX:ParallelGCThreads=n -XX:ConcGCThreads=n
Have a look at some more related questions regarding G1GC
SELECT Lname, Cods, CASE WHEN Lname LIKE '% HN%' THEN SUBSTRING(Lname,
CHARINDEX(' ', Lname) - 50, 50) WHEN Lname LIKE 'HN%' THEN Lname ELSE
Lname END AS LnameTrue FROM dbo.____Fname_Lname
Contrary to the suggestions by some of the other answers, using the DllImport
attribute is still the correct approach.
I honestly don't understand why you can't do just like everyone else in the world and specify a relative path to your DLL. Yes, the path in which your application will be installed differs on different people's computers, but that's basically a universal rule when it comes to deployment. The DllImport
mechanism is designed with this in mind.
In fact, it isn't even DllImport
that handles it. It's the native Win32 DLL loading rules that govern things, regardless of whether you're using the handy managed wrappers (the P/Invoke marshaller just calls LoadLibrary
). Those rules are enumerated in great detail here, but the important ones are excerpted here:
Before the system searches for a DLL, it checks the following:
- If a DLL with the same module name is already loaded in memory, the system uses the loaded DLL, no matter which directory it is in. The system does not search for the DLL.
- If the DLL is on the list of known DLLs for the version of Windows on which the application is running, the system uses its copy of the known DLL (and the known DLL's dependent DLLs, if any). The system does not search for the DLL.
If
SafeDllSearchMode
is enabled (the default), the search order is as follows:
- The directory from which the application loaded.
- The system directory. Use the
GetSystemDirectory
function to get the path of this directory.- The 16-bit system directory. There is no function that obtains the path of this directory, but it is searched.
- The Windows directory. Use the
GetWindowsDirectory
function to get the path of this directory.- The current directory.
- The directories that are listed in the
PATH
environment variable. Note that this does not include the per-application path specified by the App Paths registry key. The App Paths key is not used when computing the DLL search path.
So, unless you're naming your DLL the same thing as a system DLL (which you should obviously not be doing, ever, under any circumstances), the default search order will start looking in the directory from which your application was loaded. If you place the DLL there during the install, it will be found. All of the complicated problems go away if you just use relative paths.
Just write:
[DllImport("MyAppDll.dll")] // relative path; just give the DLL's name
static extern bool MyGreatFunction(int myFirstParam, int mySecondParam);
But if that doesn't work for whatever reason, and you need to force the application to look in a different directory for the DLL, you can modify the default search path using the SetDllDirectory
function.
Note that, as per the documentation:
After calling
SetDllDirectory
, the standard DLL search path is:
- The directory from which the application loaded.
- The directory specified by the
lpPathName
parameter.- The system directory. Use the
GetSystemDirectory
function to get the path of this directory.- The 16-bit system directory. There is no function that obtains the path of this directory, but it is searched.
- The Windows directory. Use the
GetWindowsDirectory
function to get the path of this directory.- The directories that are listed in the
PATH
environment variable.
So as long as you call this function before you call the function imported from the DLL for the first time, you can modify the default search path used to locate DLLs. The benefit, of course, is that you can pass a dynamic value to this function that is computed at run-time. That isn't possible with the DllImport
attribute, so you will still use a relative path (the name of the DLL only) there, and rely on the new search order to find it for you.
You'll have to P/Invoke this function. The declaration looks like this:
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool SetDllDirectory(string lpPathName);
To return a value from a VBScript function, assign the value to the name of the function, like this:
Function getNumber
getNumber = "423"
End Function
If you are using GitBash
Step one:
netstat -ano | findstr :8080
Step two:
taskkill /PID typeyourPIDhere /F
(/F
forcefully terminates the process)
If you happen to already have Fink installed, this worked for me on Yosemite / OS X 10.10.5:
fink install git
Note that as a side effect, other git commands are also using the newer git version (2.5.1) installed by Fink, rather than the version from Apple (2.3.2), which is still there but preempted by my $PATH.
As for how to represent a single apostrophe as a string in Python, you can simply surround it with double quotes ("'"
) or you can escape it inside single quotes ('\''
).
To remove apostrophes from a string, a simple approach is to just replace the apostrophe character with an empty string:
>>> "didn't".replace("'", "")
'didnt'
$ck=2016-09-13 14:12:33;
$endtime = date('H-i-s', strtotime("+05 minutes", strtotime($ck)));
Now as an extension method:
public static class LinqExt
{
public static IEnumerable<TResult> LeftOuterJoin<TLeft, TRight, TKey, TResult>(this IEnumerable<TLeft> left, IEnumerable<TRight> right, Func<TLeft, TKey> leftKey, Func<TRight, TKey> rightKey,
Func<TLeft, TRight, TResult> result)
{
return left.GroupJoin(right, leftKey, rightKey, (l, r) => new { l, r })
.SelectMany(
o => o.r.DefaultIfEmpty(),
(l, r) => new { lft= l.l, rght = r })
.Select(o => result.Invoke(o.lft, o.rght));
}
}
Use like you would normally use join:
var contents = list.LeftOuterJoin(list2,
l => l.country,
r => r.name,
(l, r) => new { count = l.Count(), l.country, l.reason, r.people })
Hope this saves you some time.
I also get ECONNRESET error during my development, the way I solve it is by not using nodemon to start my server, just use "node server.js"
to start my server fixed my problem.
It's weird, but it worked for me, now I never see the ECONNRESET error again.
I use Apache HTTPClient to handle all the HTTP side of things.
I write XML SAX parsers for the XML content that parses the XML into your object model. I believe that Axis2 also exposes XML -> Model methods (Axis 1 hid this part, annoyingly). XML generators are trivially simple.
It doesn't take long to code, and is quite efficient, in my opinion.
if (window.confirm('Really go to another page?'))
{
alert('message');
window.location = '/some/url';
}
else
{
die();
}
A String
is immutable, i.e. when it's created, it can never change.
A StringBuffer
(or its non-synchronized cousin StringBuilder
) is used when you need to construct a string piece by piece without the performance overhead of constructing lots of little String
s along the way.
The maximum length for both is Integer.MAX_VALUE, because they are stored internally as arrays, and Java arrays only have an int
for their length pseudo-field.
The performance improvement between String
s and StringBuffer
s for multiple concatenation is quite significant. If you run the following test code, you will see the difference. On my ancient laptop with Java 6, I get these results:
Concat with String took: 1781ms Concat with StringBuffer took: 0ms
public class Concat
{
public static String concatWithString()
{
String t = "Cat";
for (int i=0; i<10000; i++)
{
t = t + "Dog";
}
return t;
}
public static String concatWithStringBuffer()
{
StringBuffer sb = new StringBuffer("Cat");
for (int i=0; i<10000; i++)
{
sb.append("Dog");
}
return sb.toString();
}
public static void main(String[] args)
{
long start = System.currentTimeMillis();
concatWithString();
System.out.println("Concat with String took: " + (System.currentTimeMillis() - start) + "ms");
start = System.currentTimeMillis();
concatWithStringBuffer();
System.out.println("Concat with StringBuffer took: " + (System.currentTimeMillis() - start) + "ms");
}
}
followers_df.reset_index()
followers_df.reindex(index=range(0,20))
I tried experimenting with the answers given. My personal finding came out to be:
git rm -r --cached .
And then
git add .
This seemed to make my working directory nice and clean. You can put your fileName in place of the dot.
Use JSON lib E.g. http://www.json.org/java/
// Assume you have a Map<String, String> in JSONObject jdata
@SuppressWarnings("unchecked")
Iterator<String> nameItr = jdata.keys();
Map<String, String> outMap = new HashMap<String, String>();
while(nameItr.hasNext()) {
String name = nameItr.next();
outMap.put(name, jdata.getString(name));
}
An example to help you get off the ground.
for f in *.jpg; do mv "$f" "$(echo "$f" | sed s/IMG/VACATION/)"; done
In this example, I am assuming that all your image files contain the string IMG
and you want to replace IMG
with VACATION
.
The shell automatically evaluates *.jpg
to all the matching files.
The second argument of mv
(the new name of the file) is the output of the sed
command that replaces IMG
with VACATION
.
If your filenames include whitespace pay careful attention to the "$f"
notation. You need the double-quotes to preserve the whitespace.
I tried few options but, this works best for me:
String text = "<strike><font color=\'#757575\'>Some text</font></strike>";
textview.setText(Html.fromHtml(text));
cheers
I use the following snippet to view all the rows in a table. Use a query to find all the rows. The returned objects are the class instances. They can be used to view/edit the values as required:
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import create_engine, Sequence
from sqlalchemy import String, Integer, Float, Boolean, Column
from sqlalchemy.orm import sessionmaker
Base = declarative_base()
class MyTable(Base):
__tablename__ = 'MyTable'
id = Column(Integer, Sequence('user_id_seq'), primary_key=True)
some_col = Column(String(500))
def __init__(self, some_col):
self.some_col = some_col
engine = create_engine('sqlite:///sqllight.db', echo=True)
Session = sessionmaker(bind=engine)
session = Session()
for class_instance in session.query(MyTable).all():
print(vars(class_instance))
session.close()
Here's an example for those who have more complicated conditions and using Doctrine 2.* with QueryBuilder
:
$qb->where('o.foo = 1')
->andWhere($qb->expr()->orX(
$qb->expr()->eq('o.bar', 1),
$qb->expr()->eq('o.bar', 2)
))
;
Those are expressions mentioned in Czechnology answer.
In this example, you may show your menu centered.
<div id="main-menu-container">
<div id="main-menu">
//your menu
</div>
</div>
.f-nav{ /* To fix main menu container */
z-index: 9999;
position: fixed;
left: 0;
top: 0;
width: 100%;
}
#main-menu-container {
text-align: center; /* Assuming your main layout is centered */
}
#main-menu {
display: inline-block;
width: 1024px; /* Your menu's width */
}
$("document").ready(function($){
var nav = $('#main-menu-container');
$(window).scroll(function () {
if ($(this).scrollTop() > 125) {
nav.addClass("f-nav");
} else {
nav.removeClass("f-nav");
}
});
});
Try the solution with is described here: Exact Substring Searches in ElasticSearch
{
"mappings": {
"my_type": {
"index_analyzer":"index_ngram",
"search_analyzer":"search_ngram"
}
},
"settings": {
"analysis": {
"filter": {
"ngram_filter": {
"type": "ngram",
"min_gram": 3,
"max_gram": 8
}
},
"analyzer": {
"index_ngram": {
"type": "custom",
"tokenizer": "keyword",
"filter": [ "ngram_filter", "lowercase" ]
},
"search_ngram": {
"type": "custom",
"tokenizer": "keyword",
"filter": "lowercase"
}
}
}
}
}
To solve the disk usage problem and the too-long search term problem short 8 characters long ngrams are used (configured with: "max_gram": 8). To search for terms with more than 8 characters, turn your search into a boolean AND query looking for every distinct 8-character substring in that string. For example, if a user searched for large yard (a 10-character string), the search would be:
"arge ya AND arge yar AND rge yard.
You can Start the android Service by this command.
adb shell am startservice -n packageName/.ServiceClass
You cannot validate alone with JS only. But if you want to check in the submit button that reCAPTCHA is validated or not that is user has clicked on reCAPTCHA then you can do that using below code.
let recaptchVerified = false;
firebase.initializeApp(firebaseConfig);
firebase.auth().languageCode = 'en';
window.recaptchaVerifier = new firebase.auth.RecaptchaVerifier('recaptcha-container',{
'callback': function(response) {
recaptchVerified = true;
// reCAPTCHA solved, allow signInWithPhoneNumber.
// ...
},
'expired-callback': function() {
// Response expired. Ask user to solve reCAPTCHA again.
// ...
}
});
Here I have used a variable recaptchVerified where I make it initially false and when Recaptcha is validated then I make it true.
So I can use recaptchVerified variable when the user click on the submit button and check if he had verified the captcha or not.
In my case, a AfterBuild target in the project to compile the web application was the reason for this error.
See here for more info
Thanks a lot this note was very useful for me! Was able to send the variable defined under /group_var/vars in the ansible playbook as indicated below.
tasks:
- name: check service account password expiry
- command:
sh /home/monit/get_ldap_attr.sh {{ item }} {{ LDAP_AUTH_USR }}
In my case, the solution is:
[ngModel]="X?.Y" (ngModelChange)="X.Y=$event"
I came across this question when I was trying to learn how to pass data from one View Controller to another. I need something visual to help me learn though, so this answer is a supplement to the others already here. It is a little more general than the original question but it can be adapted to work.
This basic example works like this:
The idea is to pass a string from the text field in the First View Controller to the label in the Second View Controller.
import UIKit
class FirstViewController: UIViewController {
@IBOutlet weak var textField: UITextField!
// This function is called before the segue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// get a reference to the second view controller
let secondViewController = segue.destinationViewController as! SecondViewController
// set a variable in the second view controller with the String to pass
secondViewController.receivedString = textField.text!
}
}
import UIKit
class SecondViewController: UIViewController {
@IBOutlet weak var label: UILabel!
// This variable will hold the data being passed from the First View Controller
var receivedString = ""
override func viewDidLoad() {
super.viewDidLoad()
// Used the text from the First View Controller to set the label
label.text = receivedString
}
}
UITextField
and the UILabel
.How to send data through segue (swift) (YouTube tutorial)
View Controllers: Passing data forward and passing data back (fuller answer)
You probably did clone the repository within an existing one, to solve the problem can simply clone of the repository in another directory and replicate the changes to this new directory and then run the push.
You can use this function if you want to add the data into database, with a button. I hope it will help.
// dgvBill is name of DataGridView
string StrQuery;
try
{
using (SqlConnection conn = new SqlConnection(ConnectingString))
{
using (SqlCommand comm = new SqlCommand())
{
comm.Connection = conn;
conn.Open();
for (int i = 0; i < dgvBill.Rows.Count; i++)
{
StrQuery = @"INSERT INTO tblBillDetails (IdBill, productID, quantity, price, total) VALUES ('" + IdBillVar+ "','" + dgvBill.Rows[i].Cells[0].Value + "', '" + dgvBill.Rows[i].Cells[4].Value + "', '" + dgvBill.Rows[i].Cells[3].Value + "', '" + dgvBill.Rows[i].Cells[2].Value + "');";
comm.CommandText = StrQuery;
comm.ExecuteNonQuery();
}
}
}
}
catch (Exception err)
{
MessageBox.Show(err.Message , "Error !");
}
Because I know it's possible in while conditions, but I'm not sure if I'm doing it wrong for the if-statement or if it's just not possible.
HINT: what type while and if condition should be ??
If it can be done with while, it can be done with if statement as weel, as both of them expect a boolean condition.
Swift 3 - Xcode 8.1
@IBOutlet weak var myWebView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
let url = URL (string: "https://ir.linkedin.com/in/razipour1993")
let requestObj = URLRequest(url: url!)
myWebView.loadRequest(requestObj)
}
import random
import time
import sys
while True:
x=random.randint(1,100)
print('''Guess my number--it's from 1 to 100.''')
z=0
while True:
z=z+1
xx=int(str(sys.stdin.readline()))
if xx > x:
print("Too High!")
elif xx < x:
print("Too Low!")
elif xx==x:
print("You Win!! You used %s guesses!"%(z))
print()
break
else:
break
in this, I first string the number str()
, which converts it into an inoperable number. Then, I int()
integerize it, to make it an operable number. I just tested your problem on my IDLE GUI, and it said that 49.8 < 50.
What fixed this for me was that I had a React component being rendered prior to my core.js shim being loaded.
import ReactComponent from '.'
import 'core-js/es6'
Loading the core-js prior to the ReactComponent fixed my issue
import 'core-js/es6'
import ReactComponent from '.'
Testing $?
is an anti-pattern.
if ./somecommand | grep -q 'string'; then
echo "matched"
fi
From SQL Server 2005 on, you can use system views for that. For example, this query lists all users in a database, with their rights:
select princ.name
, princ.type_desc
, perm.permission_name
, perm.state_desc
, perm.class_desc
, object_name(perm.major_id)
from sys.database_principals princ
left join
sys.database_permissions perm
on perm.grantee_principal_id = princ.principal_id
Be aware that a user can have rights through a role as well. For example, the db_data_reader
role grants select
rights on most objects.
git gc --prune=now
is not what you want.
git remote prune public
or git remote prune origin
# if thats the the remote source
is what you want
The solution is pretty easy... Searched for it for a while and it turns out that you just have to edit 2 config-files:
/usr/my.cnf
/etc/mysql/my.cnf
in both files you'll have to add:
[mysqld]
...
sql_mode=NO_ENGINE_SUBSTITUTION
At least, that's what's working for 5.6.24-2+deb.sury.org~precise+2
That is htmlFor in JSX and class is className in JSX
There's a solution for both positive and negative x
but only for positive y
with just 1 division and without branches:
int ceil(int x, int y) {
return x / y + (x % y > 0);
}
Note, if x
is positive then division is towards zero, and we should add 1 if reminder is not zero.
If x
is negative then division is towards zero, that's what we need, and we will not add anything because x % y
is not positive
If anyone getting this dependency issue in 2019, update Android Studio to 3.4 or later
Steps to debug:-
In case you face any issue in kubernetes, first step is to check if kubernetes self applications are running fine or not.
Command to check:- kubectl get pods -n kube-system
If you see any pod is crashing, check it's logs
if getting NotReady
state error, verify network pod logs.
if not able to resolve with above, follow below steps:-
kubectl get nodes
# Check which node is not in ready state
kubectl describe node nodename
#nodename which is not in readystate
ssh to that node
execute systemctl status kubelet
# Make sure kubelet is running
systemctl status docker
# Make sure docker service is running
journalctl -u kubelet
# To Check logs in depth
Most probably you will get to know about error here, After fixing it reset kubelet with below commands:-
systemctl daemon-reload
systemctl restart kubelet
In case you still didn't get the root cause, check below things:-
Make sure your node has enough space and memory. Check for /var
directory space especially.
command to check: -df
-kh
, free -m
Verify cpu utilization with top command. and make sure any process is not taking an unexpected memory.
Command-Option-Shift-K to clean out the build folder. Even better, quit Xcode and clean out ~/Library/Developer/Xcode/DerivedData manually. Remove all its contents because there's a bug where Xcode will run an old version of your project that's in there somewhere. (Xcode 4.2 will show you the Derived Data folder: choose Window > Organizer and switch to the Projects tab. Click the right-arrow to the right of the Derived Data folder name.)
In the simulator, choose iOS Simulator > Reset Content and Settings.
Finally, for completeness, you can delete the contents of /var/folders; some caching happens there too.
WARNING: Deleting /var/folders can cause issues, and you may need to repair or reinstall your operating system after doing so.
EDIT: I have just learned that if you are afraid to grapple with /var/folders/ you can use the following command in the Terminal to delete in a more targeted way:
rm -rf "$(getconf DARWIN_USER_CACHE_DIR)/org.llvm.clang/ModuleCache"
EDIT: For certain Swift-related problems I have found it useful to delete ~/Library/Caches/com.apple.dt.Xcode. You lose a lot when you do this, like your spare copies of the downloaded documentation doc sets, but it can be worth it.
You can access a public/protected property using the data binding expression <%# myproperty %>
as given below:
<asp:Label ID="Label1" runat="server" Text="<%#CodeBehindVarPublic %>"></asp:Label>
you should call DataBind method, otherwise it can't be evaluated.
public partial class WebForm1 : System.Web.UI.Page
{
public string CodeBehindVarPublic { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
CodeBehindVarPublic ="xyz";
//you should call the next line in case of using <%#CodeBehindVarPublic %>
DataBind();
}
}
SQLite: The above answers are all correct. For SQLite, it is a little bit different. Nothing really helps, even to put it in a batch is (sometimes) not improving performance. In that case, try to disable auto-commit and commit by hand after you are done (Warning! When multiple connections write at the same time, you can clash with these operations)
// connect(), yourList and compiledQuery you have to implement/define beforehand
try (Connection conn = connect()) {
conn.setAutoCommit(false);
preparedStatement pstmt = conn.prepareStatement(compiledQuery);
for(Object o : yourList){
pstmt.setString(o.toString());
pstmt.executeUpdate();
pstmt.getGeneratedKeys(); //if you need the generated keys
}
pstmt.close();
conn.commit();
}
I have used similar code for downloading logs from servers. I debug my code and discovered that implementation of URLConnection which is returned is sun.net.www.protocol.http.HttpURLConnection.
Abstract class java.net.URLConnection have two attributes connectTimeout and readTimeout and setters are in abstract class. Believe or not implementation sun.net.www.protocol.http.HttpURLConnection have same attributes connectTimeout and readTimeout without setters and attributes from implementation class are used in getInputStream method. So there is no use of setting connectTimeout and readTimeout because they are never used in getInputStream method. In my opinion this is bug in sun.net.www.protocol.http.HttpURLConnection implementation.
My solution for this was to use HttpClient and Get request.
Here's my two cents: Considering a CSV file is just lines of text I've streamed the data (strings) to avoid this problem.
Easiest solution for me that worked in my usecase.
It can be used with graceful fs or standard fs. Just note that there won't be headers in the file when creating.
// import graceful-fs or normal fs
const fs = require("graceful-fs"); // or use: const fs = require("fs")
// Create output file and set it up to receive streamed data
// Flag is to say "append" so that data can be recursively added to the same file
let fakeCSV = fs.createWriteStream("./output/document.csv", {
flags: "a",
});
and the data that needs to be streamed to the file i've done like this
// create custom streamer that can be invoked when needed
const customStreamer = (dataToWrite) => {
fakeCSV.write(dataToWrite + "\n");
};
Note that the dataToWrite is simply a string with a custom seperator like ";" or ",". i.e.
const dataToWrite = "batman" + ";" + "superman"
customStreamer(dataToWrite);
This writes "batman;superman" to the file.
You can use the List.addAll() method. It accepts a Collection as an argument, and your set is a Collection.
List<String> mainList = new ArrayList<String>();
mainList.addAll(set);
EDIT: as respond to the edit of the question.
It is easy to see that if you want to have a Map
with List
s as values, in order to have k different values, you need to create k different lists.
Thus: You cannot avoid creating these lists at all, the lists will have to be created.
Possible work around:
Declare your Map
as a Map<String,Set>
or Map<String,Collection>
instead, and just insert your set.
An RGB hex string is just a number from 0x0 through 0xFFFFFF, so simply generate a number in that range and convert it to hexadecimal:
function rand_color() {
return '#' . str_pad(dechex(mt_rand(0, 0xFFFFFF)), 6, '0', STR_PAD_LEFT);
}
or:
function rand_color() {
return sprintf('#%06X', mt_rand(0, 0xFFFFFF));
}
Eclipse is a runtime environment for plugins. Virtually everything you see in Eclipse is the result of plugins installed on Eclipse, rather than Eclipse itself.
The .project
file is maintained by the core Eclipse platform, and its goal is to describe the project from a generic, plugin-independent Eclipse view. What's the project's name? what other projects in the workspace does it refer to? What are the builders that are used in order to build the project? (remember, the concept of "build" doesn't pertain specifically to Java projects, but also to other types of projects)
The .classpath
file is maintained by Eclipse's JDT feature (feature = set of plugins). JDT holds multiple such "meta" files in the project (see the .settings
directory inside the project); the .classpath
file is just one of them. Specifically, the .classpath
file contains information that the JDT feature needs in order to properly compile the project: the project's source folders (that is, what to compile); the output folders (where to compile to); and classpath entries (such as other projects in the workspace, arbitrary JAR files on the file system, and so forth).
Blindly copying such files from one machine to another may be risky. For example, if arbitrary JAR files are placed on the classpath (that is, JAR files that are located outside the workspace and are referred-to by absolute path naming), the .classpath
file is rendered non-portable and must be modified in order to be portable. There are certain best practices that can be followed to guarantee .classpath
file portability.
You can also add the "value" attribute and set that so something like so:
<textarea value="your value"> </textarea>
To be able to detect unused imports, code or variables, make sure you have this options in tsconfig.json file
"compilerOptions": {
"noUnusedLocals": true,
"noUnusedParameters": true
}
have the typescript compiler installed, ifnot install it with:
npm install -g typescript
and the tslint extension installed in Vcode, this worked for me, but after enabling I notice an increase amount of CPU usage, specially on big projects.
I would also recomend using typescript hero extension for organizing your imports.
Don't make it an Array if it is not an Array, make it an object:
var saveData = {};
saveData.a = 2;
saveData.c = 1;
// equivalent to...
var saveData = {a: 2, c: 1}
// equivalent to....
var saveData = {};
saveData['a'] = 2;
saveData['c'] = 1;
Doing it the way you are doing it with Arrays is just taking advantage of Javascript's treatment of Arrays and not really the right way of doing it.
JFrame.dispose() affects only to this frame (release all of the native screen resources used by this component, its subcomponents, and all children). System.exit() affects to entire JVM.
If you want to close all JFrame or all Window (since Frames extend Windows) to terminate the application in an ordered mode, you can do some like this:
Arrays.asList(Window.getWindows()).forEach(e -> e.dispose()); // or JFrame.getFrames()
You just need to click on console at the bottom of the screen in phpMyAdmin and you will get the Executed history:
Just for the sake of people who landed here for the same reason I did:
Don't use reserved keywords
I named a function in my class definition delete(), which is a reserved keyword and should not be used as a function name. Renaming it to deletion() (which also made sense semantically in my case) resolved the issue.
For a list of reserved keywords: http://en.cppreference.com/w/cpp/keyword
I quote: "Since they are used by the language, these keywords are not available for re-definition or overloading. "
I tried most of solution given in the 1st answer, the only one that worked for me and is non-commercial is php-desktop.
I simply put my php files in the www/
folder, changed the name of .exe
and was able to run my php as an exe !!
Also there is a complete documentation, up to date support, windows and linux (and soon mac) compatibility and options can easily be changed.
You can modify just the two lines:
->where('(library.available_until >=', date("Y-m-d H:i:s"), FALSE)
->or_where("library.available_until = '00-00-00 00:00:00')", NULL, FALSE)
EDIT:
Omitting the FALSE
parameter would have placed the backticks before the brackets and make them a part of the table name/value, making the query unusable.
The NULL
parameter is there just because the function requires the second parameter to be a value, and since we don't have one, we send NULL.
To clarify for anyone who is looking for what is the difference between the 3 on a simpler level. You can expose your service with minimal ClusterIp (within k8s cluster) or larger exposure with NodePort (within cluster external to k8s cluster) or LoadBalancer (external world or whatever you defined in your LB).
ClusterIp exposure < NodePort exposure < LoadBalancer exposure
ip/name:port
ip/name:port
one of the best things about git is that you can change the work flow that works best for you.. I do use http://nvie.com/posts/a-successful-git-branching-model/ most of the time but you can use any workflow that fits your needs
#For Unable to 'apt update' my Ubuntu 19.04
The repositories for older releases that are not supported (like 11.04, 11.10 and 13.04) get moved to an archive server. There are repositories available at http://old-releases.ubuntu.com.
first break up this file
cp /etc/apt/sources.list /etc/apt/sources.list.bak sudo sed -i -re 's/([a-z]{2}.)?archive.ubuntu.com|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list
then
sudo apt-get update && sudo apt-get dist-upgrade
Other answers have already covered profiling to avoid premature optimization and overhead cost in parallel processing. This answer explains the ideal choice of data structures for parallel streaming.
As a rule, performance gains from parallelism are best on streams over
ArrayList
,HashMap
,HashSet
, andConcurrentHashMap
instances; arrays;int
ranges; andlong
ranges. What these data structures have in common is that they can all be accurately and cheaply split into subranges of any desired sizes, which makes it easy to divide work among parallel threads. The abstraction used by the streams library to perform this task is the spliterator , which is returned by thespliterator
method onStream
andIterable
.Another important factor that all of these data structures have in common is that they provide good-to-excellent locality of reference when processed sequentially: sequential element references are stored together in memory. The objects referred to by those references may not be close to one another in memory, which reduces locality-of-reference. Locality-of-reference turns out to be critically important for parallelizing bulk operations: without it, threads spend much of their time idle, waiting for data to be transferred from memory into the processor’s cache. The data structures with the best locality of reference are primitive arrays because the data itself is stored contiguously in memory.
Source: Item #48 Use Caution When Making Streams Parallel, Effective Java 3e by Joshua Bloch
This exists in @ManyToOne relation. I solved this issue by just using CascadeType.MERGE instead of CascadeType.PERSIST or CascadeType.ALL. Hope it helps you.
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name="updated_by", referencedColumnName = "id")
private Admin admin;
Solution:
@ManyToOne(cascade = CascadeType.MERGE)
@JoinColumn(name="updated_by", referencedColumnName = "id")
private Admin admin;
[a-zA-Z0-9] will only match ASCII characters, it won't match
String target = new String("A" + "\u00ea" + "\u00f1" +
"\u00fc" + "C");
If you also want to match unicode characters:
String pat = "^[\\p{L}0-9]*$";
To highlight a block of code in Notepad++, please do the following steps
Style token
and select any of the five choices available ( styles from Using 1st style
to using 5th style
). Each is of different colors.If you want yellow color choose using 3rd style
.If you want to create your own style you can use Style Configurator
under Settings
menu.
The official way to handle this is using the PECL HTTP library. Unlike some answers here, this correctly handles the language priorities (q-values), partial language matches and will return the closest match, or when there are no matches it falls back to the first language in your array.
PECL HTTP:
http://pecl.php.net/package/pecl_http
How to use:
http://php.net/manual/fa/function.http-negotiate-language.php
$supportedLanguages = [
'en-US', // first one is the default/fallback
'fr',
'fr-FR',
'de',
'de-DE',
'de-AT',
'de-CH',
];
// Returns the negotiated language
// or the default language (i.e. first array entry) if none match.
$language = http_negotiate_language($supportedLanguages, $result);
No regex, so no need for //.
this should work:
$str = str_replace("\\", '/', $str);
You need to escape "\" as well.
It's the same as android:typeface
.
built-in fonts are:
See android:typeface.
In PostgresQL it is:
ALTER TABLE tableName ALTER COLUMN columnName DROP NOT NULL;
You have prevent the default action of the event and return false
from the function.
function onTestClick(e) {
e.preventDefault();
return false;
}
Use a SQL DATA READER:
In this example i use a List instead an array.
try
{
SqlCommand comm = new SqlCommand("SELECT CategoryID, CategoryName FROM Categories;",connection);
connection.Open();
SqlDataReader reader = comm.ExecuteReader();
List<string> str = new List<string>();
int i=0;
while (reader.Read())
{
str.Add( reader.GetValue(i).ToString() );
i++;
}
reader.Close();
}
catch (Exception)
{
throw;
}
finally
{
connection.Close();
}
If it's a string that you trust meaning that you have checked it before hand then the following would also work.
$date = new DateTime('2015-03-27');
View single commit:
https://github.com/<user>/<project>/commit/<hash>
View log:
https://github.com/<user>/<project>/commits/<hash>
View full repo:
https://github.com/<user>/<project>/tree/<hash>
<hash>
can be any length as long as it is unique.
In my case I simply remove
implementation "com.google.android.gms:play-services-ads:16.0.0
and add firebase ads dependencies
implementation 'com.google.firebase:firebase-ads:17.1.2'
What ultimately worked for me was the following steps:
It is very simple.
HTML
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<body>
<div id="cover"> <span class="glyphicon glyphicon-refresh w3-spin preloader-Icon"></span>Please Wait, Loading…</div>
<h1>Dom Loaded</h1>
</body>
CSS
#cover {
position: fixed;
height: 100%;
width: 100%;
top: 0;
left: 0;
background: #141526;
z-index: 9999;
font-size: 65px;
text-align: center;
padding-top: 200px;
color: #fff;
font-family:tahoma;
}
JS - JQuery
$(window).on('load', function () {
$("#cover").fadeOut(1750);
});
App Engine gives developers the ability to control Google Compute Engine cores, as well as provide a web-facing front end for Google Compute Engine data processing applications.
On the other hand, Compute Engine offers direct and complete operating system management of your virtual machines. To present your App, you're going to need resources, and Google Cloud Storage is ideal for storing your assets and data, whatever they're used for. You get fast data access with hosting around the globe. Reliability is guaranteed at a 99.95% up-time, and Google also provides the ability to back up and restore your data, and believe it or not, storage is unlimited.
You can manage your assets with Google Cloud Storage, storing, retrieving, displaying, and deleting them. You can also quickly read and write to flat datasheets that are kept in Cloud Storage. Next in the Google Cloud lineup is BigQuery. With BigQuery, you can analyze massive amounts of data, we're talking millions of records, within seconds. Access is handled via a straightforward UI, or a Representational State Transfer, or REST interface.
Data storage is, as you might suspect, not a problem, and scales to hundreds of TB. BigQuery is accessible via a host of client libraries, including those for Java, .NET, Python, Go, Ruby, PHP, and Javascript. A SQL-like syntax called NoSQL is available which can be accessed through these client libraries, or through a web user interface. Finally, let's talk about the Google Cloud platform database options, Cloud SQL and Cloud Datastore.
There is a major difference. Cloud SQL is for relational databases, primarily MySQL, whereas Cloud Datastore is for non-relational databases using noSQL. With Cloud SQL, you have the choice of either hosting in the US, Europe, or Asia, with 100 GB of storage, and 16 GB of RAM per database instance.
Cloud Datastore is available at no charge for up to 50 K read/write instructions per month and 1 GB of data stored also per month. There is a fee if you exceed these quotas, however. App Engine can also work with other lesser known, more targeted members of the Google Cloud platform, including the Cloud Endpoints for creating API backends, Google Prediction API for data analysis and trend forecasting, or the Google Translate API, for multilingual output.
While you can do a fair amount with App Engine on its own, It's potential skyrockets when you factor in its ability to work easily and efficiently with its fellow Google Cloud platform services.
Here's other example of taking top 3 on sorted order, and sorting within the groups:
In [43]: import pandas as pd
In [44]: df = pd.DataFrame({"name":["Foo", "Foo", "Baar", "Foo", "Baar", "Foo", "Baar", "Baar"], "count_1":[5,10,12,15,20,25,30,35], "count_2" :[100,150,100,25,250,300,400,500]})
In [45]: df
Out[45]:
count_1 count_2 name
0 5 100 Foo
1 10 150 Foo
2 12 100 Baar
3 15 25 Foo
4 20 250 Baar
5 25 300 Foo
6 30 400 Baar
7 35 500 Baar
### Top 3 on sorted order:
In [46]: df.groupby(["name"])["count_1"].nlargest(3)
Out[46]:
name
Baar 7 35
6 30
4 20
Foo 5 25
3 15
1 10
dtype: int64
### Sorting within groups based on column "count_1":
In [48]: df.groupby(["name"]).apply(lambda x: x.sort_values(["count_1"], ascending = False)).reset_index(drop=True)
Out[48]:
count_1 count_2 name
0 35 500 Baar
1 30 400 Baar
2 20 250 Baar
3 12 100 Baar
4 25 300 Foo
5 15 25 Foo
6 10 150 Foo
7 5 100 Foo
With multiple submits, when you need the value of the submit selected, this can be done quite easily. Just create a hidden field in your form and change its value depending on what button is clicked. For example, in the form, say you have:
<input type="hidden" id="Clicked" name="Clicked" value="" />
<button type="submit" class="btn btn-success ClickCheck" id="Create"> <i class="fa fa-file-pdf-o"> Create Bill</i></button>
<button type="submit" class="btn btn-success ClickCheck" id="Reset"> <i class="fa fa-times"> Reset</i></button>
<button type="submit" class="btn btn-success ClickCheck" id="StoreData"> <i class="fa fa-archive"> Save</i></button>
Using jQuery:
<script type="text/javascript">
$(document).ready(function()
{
$('.ClickCheck').click(function()
{
var ButtonID = $(this).attr('id');
$('#Clicked').val(ButtonID);
});
});
</script>
Then you can retrieve the value of the button clicked in the "Clicked" post variable
Both attributes have been added to Bootstrap CDN to implement Subresource Integrity.
Subresource Integrity defines a mechanism by which user agents may verify that a fetched resource has been delivered without unexpected manipulation Reference
Integrity attribute is to allow the browser to check the file source to ensure that the code is never loaded if the source has been manipulated.
Crossorigin attribute is present when a request is loaded using 'CORS' which is now a requirement of SRI checking when not loaded from the 'same-origin'. More info on crossorigin
Ref: https://garbagevalue.com/blog/4-simle-ways-to-check-ip-adress-in-centos-7
I'm using CentOS 7 and command
ip a
is enough to do the job.
Just slice out the IP address part from that test.
ip a | grep 192
MSDN seems to have an article for this now:
https://msdn.microsoft.com/en-us/library/bb412196(v=vs.110).aspx
Intro:
By default, Windows Communication Foundation (WCF) makes endpoints available only to SOAP clients. In How to: Create a Basic WCF Web HTTP Service, an endpoint is made available to non-SOAP clients. There may be times when you want to make the same contract available both ways, as a Web endpoint and as a SOAP endpoint. This topic shows an example of how to do this.
Before you do anything further, seek to understand the difference between encryption and authentication, and why you probably want authenticated encryption rather than just encryption.
To implement authenticated encryption, you want to Encrypt then MAC. The order of encryption and authentication is very important! One of the existing answers to this question made this mistake; as do many cryptography libraries written in PHP.
You should avoid implementing your own cryptography, and instead use a secure library written by and reviewed by cryptography experts.
Update: PHP 7.2 now provides libsodium! For best security, update your systems to use PHP 7.2 or higher and only follow the libsodium advice in this answer.
Use libsodium if you have PECL access (or sodium_compat if you want libsodium without PECL); otherwise...
Use defuse/php-encryption; don't roll your own cryptography!
Both of the libraries linked above make it easy and painless to implement authenticated encryption into your own libraries.
If you still want to write and deploy your own cryptography library, against the conventional wisdom of every cryptography expert on the Internet, these are the steps you would have to take.
hash_equals()
. If it fails, abort.mb_strlen()
and mb_substr()
, using the '8bit'
character set mode to prevent mbstring.func_overload
issues.mcrypt_create_iv()
, DO NOT USE MCRYPT_RAND
!
bin2hex()
, base64_encode()
, etc. may leak information about your encryption keys via cache timing. Avoid them if possible.Even if you follow the advice given here, a lot can go wrong with cryptography. Always have a cryptography expert review your implementation. If you are not fortunate enough to be personal friends with a cryptography student at your local university, you can always try the Cryptography Stack Exchange forum for advice.
If you need a professional analysis of your implementation, you can always hire a reputable team of security consultants to review your PHP cryptography code (disclosure: my employer).
Don't encrypt passwords. You want to hash them instead, using one of these password-hashing algorithms:
Never use a general-purpose hash function (MD5, SHA256) for password storage.
Don't encrypt URL Parameters. It's the wrong tool for the job.
If you are on PHP < 7.2 or otherwise do not have libsodium installed, you can use sodium_compat to accomplish the same result (albeit slower).
<?php
declare(strict_types=1);
/**
* Encrypt a message
*
* @param string $message - message to encrypt
* @param string $key - encryption key
* @return string
* @throws RangeException
*/
function safeEncrypt(string $message, string $key): string
{
if (mb_strlen($key, '8bit') !== SODIUM_CRYPTO_SECRETBOX_KEYBYTES) {
throw new RangeException('Key is not the correct size (must be 32 bytes).');
}
$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
$cipher = base64_encode(
$nonce.
sodium_crypto_secretbox(
$message,
$nonce,
$key
)
);
sodium_memzero($message);
sodium_memzero($key);
return $cipher;
}
/**
* Decrypt a message
*
* @param string $encrypted - message encrypted with safeEncrypt()
* @param string $key - encryption key
* @return string
* @throws Exception
*/
function safeDecrypt(string $encrypted, string $key): string
{
$decoded = base64_decode($encrypted);
$nonce = mb_substr($decoded, 0, SODIUM_CRYPTO_SECRETBOX_NONCEBYTES, '8bit');
$ciphertext = mb_substr($decoded, SODIUM_CRYPTO_SECRETBOX_NONCEBYTES, null, '8bit');
$plain = sodium_crypto_secretbox_open(
$ciphertext,
$nonce,
$key
);
if (!is_string($plain)) {
throw new Exception('Invalid MAC');
}
sodium_memzero($ciphertext);
sodium_memzero($key);
return $plain;
}
Then to test it out:
<?php
// This refers to the previous code block.
require "safeCrypto.php";
// Do this once then store it somehow:
$key = random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);
$message = 'We are all living in a yellow submarine';
$ciphertext = safeEncrypt($message, $key);
$plaintext = safeDecrypt($ciphertext, $key);
var_dump($ciphertext);
var_dump($plaintext);
One of the projects I've been working on is an encryption library called Halite, which aims to make libsodium easier and more intuitive.
<?php
use \ParagonIE\Halite\KeyFactory;
use \ParagonIE\Halite\Symmetric\Crypto as SymmetricCrypto;
// Generate a new random symmetric-key encryption key. You're going to want to store this:
$key = new KeyFactory::generateEncryptionKey();
// To save your encryption key:
KeyFactory::save($key, '/path/to/secret.key');
// To load it again:
$loadedkey = KeyFactory::loadEncryptionKey('/path/to/secret.key');
$message = 'We are all living in a yellow submarine';
$ciphertext = SymmetricCrypto::encrypt($message, $key);
$plaintext = SymmetricCrypto::decrypt($ciphertext, $key);
var_dump($ciphertext);
var_dump($plaintext);
All of the underlying cryptography is handled by libsodium.
<?php
/**
* This requires https://github.com/defuse/php-encryption
* php composer.phar require defuse/php-encryption
*/
use Defuse\Crypto\Crypto;
use Defuse\Crypto\Key;
require "vendor/autoload.php";
// Do this once then store it somehow:
$key = Key::createNewRandomKey();
$message = 'We are all living in a yellow submarine';
$ciphertext = Crypto::encrypt($message, $key);
$plaintext = Crypto::decrypt($ciphertext, $key);
var_dump($ciphertext);
var_dump($plaintext);
Note: Crypto::encrypt()
returns hex-encoded output.
If you're tempted to use a "password", stop right now. You need a random 128-bit encryption key, not a human memorable password.
You can store an encryption key for long-term use like so:
$storeMe = bin2hex($key);
And, on demand, you can retrieve it like so:
$key = hex2bin($storeMe);
I strongly recommend just storing a randomly generated key for long-term use instead of any sort of password as the key (or to derive the key).
If you're using Defuse's library:
That's a bad idea, but okay, here's how to do it safely.
First, generate a random key and store it in a constant.
/**
* Replace this with your own salt!
* Use bin2hex() then add \x before every 2 hex characters, like so:
*/
define('MY_PBKDF2_SALT', "\x2d\xb7\x68\x1a\x28\x15\xbe\x06\x33\xa0\x7e\x0e\x8f\x79\xd5\xdf");
Note that you're adding extra work and could just use this constant as the key and save yourself a lot of heartache!
Then use PBKDF2 (like so) to derive a suitable encryption key from your password rather than encrypting with your password directly.
/**
* Get an AES key from a static password and a secret salt
*
* @param string $password Your weak password here
* @param int $keysize Number of bytes in encryption key
*/
function getKeyFromPassword($password, $keysize = 16)
{
return hash_pbkdf2(
'sha256',
$password,
MY_PBKDF2_SALT,
100000, // Number of iterations
$keysize,
true
);
}
Don't just use a 16-character password. Your encryption key will be comically broken.
I want to extend @Jan answer:
It's seems, that Task Scheduler 1.0 API
uses C:\Windows\Tasks
folder for create and enumerate tasks (this example), while Task Scheduler 2.0 API
uses C:\Windows\System32\Tasks
to create and enumerate tasks (this example).
It's also seems, that windows console utility schtasks
and GUI utility taskschd.msc
uses Task Scheduler 2.0 API
.
P.S.
I found, that if task placed in C:\Windows\Tasks
and have not set AccountInformation
, then task won't be displayed in windows console and GUI schedulers. If you set AccountInformation
(even "" for SYSTEM account) and set flag TASK_FLAG_RUN_ONLY_IF_LOGGED_ON
- task will be displayed in all standard applications.
In case anyone is getting back to this question and deciding to write their own middleware, this is a code sample for Django's new style middleware -
class CORSMiddleware(object):
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
response = self.get_response(request)
response["Access-Control-Allow-Origin"] = "*"
return response
Swift 2 and below
let date = NSDate()
var dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy"
var dateString = dateFormatter.stringFromDate(date)
println(dateString)
And in Swift 3 and higher this would now be written as:
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy"
var dateString = dateFormatter.string(from: date)
This will work in SQL Server 2008.
select top 100 ROW_NUMBER() OVER (ORDER BY tmp.FirstName) ,* from tmp
Cheers
If you want to Iterate through the Fields and Values of a struct then you can use the below Go code as a reference.
package main
import (
"fmt"
"reflect"
)
type Student struct {
Fname string
Lname string
City string
Mobile int64
}
func main() {
s := Student{"Chetan", "Kumar", "Bangalore", 7777777777}
v := reflect.ValueOf(s)
typeOfS := v.Type()
for i := 0; i< v.NumField(); i++ {
fmt.Printf("Field: %s\tValue: %v\n", typeOfS.Field(i).Name, v.Field(i).Interface())
}
}
Run in playground
Note: If the Fields in your struct are not exported then the v.Field(i).Interface()
will give panic panic: reflect.Value.Interface: cannot return value obtained from unexported field or method.
I know this question is old, but no one has mentioned a native solution yet. If you're not trying to support archaic browsers (which you shouldn't be at this point), you can use array.filter
:
var arr = [];_x000D_
arr.push({name:"k1", value:"abc"});_x000D_
arr.push({name:"k2", value:"hi"});_x000D_
arr.push({name:"k3", value:"oa"});_x000D_
_x000D_
var found = arr.filter(function(item) { return item.name === 'k1'; });_x000D_
_x000D_
console.log('found', found[0]);
_x000D_
Check the console.
_x000D_
You can see a list of supported browsers here.
In the future with ES6, you'll be able to use array.find.
Try this
int permission = ContextCompat.checkSelfPermission(MainActivity.this,
android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED) {
Log.i("grant", "Permission to record denied");
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
android.Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(getString(R.string.permsg))
.setTitle(getString(R.string.permtitle));
builder.setPositiveButton(getString(R.string.ok), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.i("grant", "Clicked");
makeRequest();
}
});
AlertDialog dialog = builder.create();
dialog.show();
} else {
//makeRequest1();
makeRequest();
}
}
protected void makeRequest() {
ActivityCompat.requestPermissions(this,
new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE},
500);
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case 500: {
if (grantResults.length == 0
|| grantResults[0] !=
PackageManager.PERMISSION_GRANTED) {
Log.i("1", "Permission has been denied by user");
} else {
Log.i("1", "Permission has been granted by user");
}
return;
}
}
}
I think it has changed again.
For posting this works in Xcode 8.2.
NotificationCenter.default.post(Notification(name:.UIApplicationWillResignActive)
Suppose you want to insert a particular line of text (not an empty line):
@echo off
FOR /F %%C IN ('FIND /C /V "" ^<%origfile%') DO SET totallines=%%C
set /a totallines+=1
@echo off
<%origfile% (FOR /L %%i IN (1,1,%totallines%) DO (
SETLOCAL EnableDelayedExpansion
SET /p L=
IF %%i==%insertat% ECHO(!TL!
ECHO(!L!
ENDLOCAL
)
) >%tempfile%
COPY /Y %tempfile% %origfile% >NUL
DEL %tempfile%
First of all you missed ScriptService attribute to add in webservice.
[ScriptService]
After then try following method to call webservice via JSON.
var webAddr = "http://Domain/VBRService.asmx/callJson"; var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr); httpWebRequest.ContentType = "application/json; charset=utf-8"; httpWebRequest.Method = "POST"; using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream())) { string json = "{\"x\":\"true\"}"; streamWriter.Write(json); streamWriter.Flush(); } var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse(); using (var streamReader = new StreamReader(httpResponse.GetResponseStream())) { var result = streamReader.ReadToEnd(); return result; }
I'm using angular 1.6.4 and answer provided by subhaze didn't work for me. I modified it a bit and then it worked - you have to use value returned by $sce.trustAsResourceUrl. Full code:
var url = "http://public-api.wordpress.com/rest/v1/sites/wtmpeachtest.wordpress.com/posts"
url = $sce.trustAsResourceUrl(url);
$http.jsonp(url, {jsonpCallbackParam: 'callback'})
.then(function(data){
console.log(data.found);
});
First you can use a Paginator. This is as simple as:
$allUsers = User::paginate(15);
$someUsers = User::where('votes', '>', 100)->paginate(15);
The variables will contain an instance of Paginator class. all of your data will be stored under data
key.
Or you can do something like:
Old versions Laravel.
Model::all()->take(10)->get();
Newer version Laravel.
Model::all()->take(10);
For more reading consider these links:
I would use this syntax to set the index value into an attribute of the HTML element:
You have to use let
to declare the value rather than #
.
<ul>
<li *ngFor="let item of items; let i = index" [attr.data-index]="i">
{{item}}
</li>
</ul>
<ul>
<li *ngFor="#item of items; #i = index" [attr.data-index]="i">
{{item}}
</li>
</ul>
Here is the updated plunkr: http://plnkr.co/edit/LiCeyKGUapS5JKkRWnUJ?p=preview.
This life-hack decision will give you opportunity to find browser scrollY width (vanilla JavaScript). Using this example you can get scrollY width on any element including those elements that shouldn't have to have scroll according to your current design conception,:
getComputedScrollYWidth (el) {
let displayCSSValue ; // CSS value
let overflowYCSSValue; // CSS value
// SAVE current original STYLES values
{
displayCSSValue = el.style.display;
overflowYCSSValue = el.style.overflowY;
}
// SET TEMPORALLY styles values
{
el.style.display = 'block';
el.style.overflowY = 'scroll';
}
// SAVE SCROLL WIDTH of the current browser.
const scrollWidth = el.offsetWidth - el.clientWidth;
// REPLACE temporally STYLES values by original
{
el.style.display = displayCSSValue;
el.style.overflowY = overflowYCSSValue;
}
return scrollWidth;
}
How do I convert a list of dictionaries to a pandas DataFrame?
The other answers are correct, but not much has been explained in terms of advantages and limitations of these methods. The aim of this post will be to show examples of these methods under different situations, discuss when to use (and when not to use), and suggest alternatives.
DataFrame()
, DataFrame.from_records()
, and .from_dict()
Depending on the structure and format of your data, there are situations where either all three methods work, or some work better than others, or some don't work at all.
Consider a very contrived example.
np.random.seed(0)
data = pd.DataFrame(
np.random.choice(10, (3, 4)), columns=list('ABCD')).to_dict('r')
print(data)
[{'A': 5, 'B': 0, 'C': 3, 'D': 3},
{'A': 7, 'B': 9, 'C': 3, 'D': 5},
{'A': 2, 'B': 4, 'C': 7, 'D': 6}]
This list consists of "records" with every keys present. This is the simplest case you could encounter.
# The following methods all produce the same output.
pd.DataFrame(data)
pd.DataFrame.from_dict(data)
pd.DataFrame.from_records(data)
A B C D
0 5 0 3 3
1 7 9 3 5
2 2 4 7 6
orient='index'
/'columns'
Before continuing, it is important to make the distinction between the different types of dictionary orientations, and support with pandas. There are two primary types: "columns", and "index".
orient='columns'
Dictionaries with the "columns" orientation will have their keys correspond to columns in the equivalent DataFrame.
For example, data
above is in the "columns" orient.
data_c = [
{'A': 5, 'B': 0, 'C': 3, 'D': 3},
{'A': 7, 'B': 9, 'C': 3, 'D': 5},
{'A': 2, 'B': 4, 'C': 7, 'D': 6}]
pd.DataFrame.from_dict(data_c, orient='columns')
A B C D
0 5 0 3 3
1 7 9 3 5
2 2 4 7 6
Note: If you are using pd.DataFrame.from_records
, the orientation is assumed to be "columns" (you cannot specify otherwise), and the dictionaries will be loaded accordingly.
orient='index'
With this orient, keys are assumed to correspond to index values. This kind of data is best suited for pd.DataFrame.from_dict
.
data_i ={
0: {'A': 5, 'B': 0, 'C': 3, 'D': 3},
1: {'A': 7, 'B': 9, 'C': 3, 'D': 5},
2: {'A': 2, 'B': 4, 'C': 7, 'D': 6}}
pd.DataFrame.from_dict(data_i, orient='index')
A B C D
0 5 0 3 3
1 7 9 3 5
2 2 4 7 6
This case is not considered in the OP, but is still useful to know.
If you need a custom index on the resultant DataFrame, you can set it using the index=...
argument.
pd.DataFrame(data, index=['a', 'b', 'c'])
# pd.DataFrame.from_records(data, index=['a', 'b', 'c'])
A B C D
a 5 0 3 3
b 7 9 3 5
c 2 4 7 6
This is not supported by pd.DataFrame.from_dict
.
All methods work out-of-the-box when handling dictionaries with missing keys/column values. For example,
data2 = [
{'A': 5, 'C': 3, 'D': 3},
{'A': 7, 'B': 9, 'F': 5},
{'B': 4, 'C': 7, 'E': 6}]
# The methods below all produce the same output.
pd.DataFrame(data2)
pd.DataFrame.from_dict(data2)
pd.DataFrame.from_records(data2)
A B C D E F
0 5.0 NaN 3.0 3.0 NaN NaN
1 7.0 9.0 NaN NaN NaN 5.0
2 NaN 4.0 7.0 NaN 6.0 NaN
"What if I don't want to read in every single column"? You can easily specify this using the columns=...
parameter.
For example, from the example dictionary of data2
above, if you wanted to read only columns "A', 'D', and 'F', you can do so by passing a list:
pd.DataFrame(data2, columns=['A', 'D', 'F'])
# pd.DataFrame.from_records(data2, columns=['A', 'D', 'F'])
A D F
0 5.0 3.0 NaN
1 7.0 NaN 5.0
2 NaN NaN NaN
This is not supported by pd.DataFrame.from_dict
with the default orient "columns".
pd.DataFrame.from_dict(data2, orient='columns', columns=['A', 'B'])
ValueError: cannot use columns parameter with orient='columns'
Not supported by any of these methods directly. You will have to iterate over your data and perform a reverse delete in-place as you iterate. For example, to extract only the 0th and 2nd rows from data2
above, you can use:
rows_to_select = {0, 2}
for i in reversed(range(len(data2))):
if i not in rows_to_select:
del data2[i]
pd.DataFrame(data2)
# pd.DataFrame.from_dict(data2)
# pd.DataFrame.from_records(data2)
A B C D E
0 5.0 NaN 3 3.0 NaN
1 NaN 4.0 7 NaN 6.0
json_normalize
for Nested DataA strong, robust alternative to the methods outlined above is the json_normalize
function which works with lists of dictionaries (records), and in addition can also handle nested dictionaries.
pd.json_normalize(data)
A B C D
0 5 0 3 3
1 7 9 3 5
2 2 4 7 6
pd.json_normalize(data2)
A B C D E
0 5.0 NaN 3 3.0 NaN
1 NaN 4.0 7 NaN 6.0
Again, keep in mind that the data passed to json_normalize
needs to be in the list-of-dictionaries (records) format.
As mentioned, json_normalize
can also handle nested dictionaries. Here's an example taken from the documentation.
data_nested = [
{'counties': [{'name': 'Dade', 'population': 12345},
{'name': 'Broward', 'population': 40000},
{'name': 'Palm Beach', 'population': 60000}],
'info': {'governor': 'Rick Scott'},
'shortname': 'FL',
'state': 'Florida'},
{'counties': [{'name': 'Summit', 'population': 1234},
{'name': 'Cuyahoga', 'population': 1337}],
'info': {'governor': 'John Kasich'},
'shortname': 'OH',
'state': 'Ohio'}
]
pd.json_normalize(data_nested,
record_path='counties',
meta=['state', 'shortname', ['info', 'governor']])
name population state shortname info.governor
0 Dade 12345 Florida FL Rick Scott
1 Broward 40000 Florida FL Rick Scott
2 Palm Beach 60000 Florida FL Rick Scott
3 Summit 1234 Ohio OH John Kasich
4 Cuyahoga 1337 Ohio OH John Kasich
For more information on the meta
and record_path
arguments, check out the documentation.
Here's a table of all the methods discussed above, along with supported features/functionality.
* Use orient='columns'
and then transpose to get the same effect as orient='index'
.
For fellow Xamarians, the Xamarin.iOS/C# version of the answer would look like the following:
public override void DrawRect(CGRect area, UIViewPrintFormatter formatter)
{
CGContext currentContext = UIGraphics.GetCurrentContext();
currentContext.SaveState();
currentContext.SetShadow(new CGSize(-15, 20), 5);
base.DrawRect(area, formatter);
currentContext.RestoreState();
}
The main difference is that you acquire an instance of CGContext
on which you directly call the appropriate methods.
The match attribute indicates on which parts the template transformation is going to be applied. In that particular case the "/" means the root of the xml document. The value you have to provide into the match attribute should be XPath expression. XPath is the language you have to use to refer specific parts of the target xml file.
To gain a meaningful understanding of what else you can put into match attribute you need to understand what xpath is and how to use it. I suggest yo look at links I've provided for youat the bottom of the answer.
Could I write "table" or any other html tag instead of "/" ?
Yes you can. But this depends what exactly you are trying to do. if your target xml file contains HMTL elements and you are triyng to apply this xsl:template on them it makes sense to use table, div or anithing else.
Here a few links:
you could try:
<a href="#/controllerone">Controller One</a>||
<a href="#/controllerTwo">Controller Two</a>||
<a href="#/controllerThree">Controller Three</a>
<div>
<div ng-view=""></div>
</div>
Assuming there is a column named business:
SELECT Business, COUNT(*) FROM eventsTable GROUP BY Business
These answers are O(n), so a little more code than using mylist.count()
but much more efficient as mylist
gets longer
If you just want to know the duplicates, use collections.Counter
from collections import Counter
mylist = [20, 30, 25, 20]
[k for k,v in Counter(mylist).items() if v>1]
If you need to know the indices,
from collections import defaultdict
D = defaultdict(list)
for i,item in enumerate(mylist):
D[item].append(i)
D = {k:v for k,v in D.items() if len(v)>1}
this worked:
Date date = null;
String dateStr = rs.getString("doc_date");
if (dateStr != null) {
date = dateFormat.parse(dateStr);
}
using SimpleDateFormat.
There is of course a lubridate
solution for this:
library(lubridate)
date <- "2009-10-01"
ymd(date) - 5
# [1] "2009-09-26"
is the same as
ymd(date) - days(5)
# [1] "2009-09-26"
Other time formats could be:
ymd(date) - months(5)
# [1] "2009-05-01"
ymd(date) - years(5)
# [1] "2004-10-01"
ymd(date) - years(1) - months(2) - days(3)
# [1] "2008-07-29"
Pickling will serialize your list (convert it, and it's entries to a unique byte string), so you can save it to disk. You can also use pickle to retrieve your original list, loading from the saved file.
So, first build a list, then use pickle.dump
to send it to a file...
Python 3.4.1 (default, May 21 2014, 12:39:51)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> mylist = ['I wish to complain about this parrot what I purchased not half an hour ago from this very boutique.', "Oh yes, the, uh, the Norwegian Blue...What's,uh...What's wrong with it?", "I'll tell you what's wrong with it, my lad. 'E's dead, that's what's wrong with it!", "No, no, 'e's uh,...he's resting."]
>>>
>>> import pickle
>>>
>>> with open('parrot.pkl', 'wb') as f:
... pickle.dump(mylist, f)
...
>>>
Then quit and come back later… and open with pickle.load
...
Python 3.4.1 (default, May 21 2014, 12:39:51)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pickle
>>> with open('parrot.pkl', 'rb') as f:
... mynewlist = pickle.load(f)
...
>>> mynewlist
['I wish to complain about this parrot what I purchased not half an hour ago from this very boutique.', "Oh yes, the, uh, the Norwegian Blue...What's,uh...What's wrong with it?", "I'll tell you what's wrong with it, my lad. 'E's dead, that's what's wrong with it!", "No, no, 'e's uh,...he's resting."]
>>>
I have Mojave 10.14.6 and the only thing that did work for me was:
export JAVA_HOME=/Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
Hope it helps! You can now type java --version
and it should work
You can use arguments with default values.
def someMethod(def mandatory,def optional=null){}
if argument "optional" not exist, it turns to "null".
A tweak of Daniel's version to calculate percentile along with rank. Also two people with same marks will get the same rank.
set @totalStudents = 0;
select count(*) into @totalStudents from marksheets;
SELECT id, score, @curRank := IF(@prevVal=score, @curRank, @studentNumber) AS rank,
@percentile := IF(@prevVal=score, @percentile, (@totalStudents - @studentNumber + 1)/(@totalStudents)*100),
@studentNumber := @studentNumber + 1 as studentNumber,
@prevVal:=score
FROM marksheets, (
SELECT @curRank :=0, @prevVal:=null, @studentNumber:=1, @percentile:=100
) r
ORDER BY score DESC
Results of the query for a sample data -
+----+-------+------+---------------+---------------+-----------------+
| id | score | rank | percentile | studentNumber | @prevVal:=score |
+----+-------+------+---------------+---------------+-----------------+
| 10 | 98 | 1 | 100.000000000 | 2 | 98 |
| 5 | 95 | 2 | 90.000000000 | 3 | 95 |
| 6 | 91 | 3 | 80.000000000 | 4 | 91 |
| 2 | 91 | 3 | 80.000000000 | 5 | 91 |
| 8 | 90 | 5 | 60.000000000 | 6 | 90 |
| 1 | 90 | 5 | 60.000000000 | 7 | 90 |
| 9 | 84 | 7 | 40.000000000 | 8 | 84 |
| 3 | 83 | 8 | 30.000000000 | 9 | 83 |
| 4 | 72 | 9 | 20.000000000 | 10 | 72 |
| 7 | 60 | 10 | 10.000000000 | 11 | 60 |
+----+-------+------+---------------+---------------+-----------------+
For the things that you are suggesting you can just change the levels using the levels
:
levels(iris$Species)[3] <- 'new'
I have an app that only needs to run from monday to friday around lunchtime. I just added the following script to the crontab at work:
#!/bin/sh
# script to unidle heroku installation for the use with cronjob
# usage in crontab:
# */5 11-15 * * 1-5 /usr/local/bin/uptimer.sh http://www.example.com
# The command /usr/local/bin/uptimer.sh http://www.example.com will execute every 5th minute of 11am through 3pm Mondays through Fridays in every month.
# resources: http://www.cronchecker.net
echo url to unidle: $1
echo [UPTIMER]: waking up at:
date
curl $1
echo [UPTIMER]: awake at:
date
So for any app just drop another line in your crontab like:
*/5 11-15 * * 1-5 /usr/local/bin/uptimer.sh http://www.example.com
I'm not sure why this work but using Pycharm build from file_in_same_dir import class_name
The IDE complained about it but it seems it still worked. I'm using Python 3.7
ALTER TABLE [TableName] ADD CONSTRAINT [constraintName] UNIQUE ([columns])
I have found that wget does not properly authenticate with some servers, perhaps because it is only HTTP 1.0 compliant. In such cases, curl (which is HTTP 1.1 compliant) usually does the trick:
curl -o <filename-to-save-as> -u <username>:<password> <url>
I ran into this exact issue and couldn't get around it by any of the solutions mentioned.
Then I finally found a solution. It appears that the serializer needs not only the type, but the nested types as well. Changing this:
XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
To this:
XmlSerializer xmlSerializer = new XmlSerializer(typeof(T).GetNestedTypes());
Fixed the issue for me. No more exceptions or anything.
Learning to use smart pointers is in my opinion one of the most important steps to become a competent C++ programmer. As you know whenever you new an object at some point you want to delete it.
One issue that arise is that with exceptions it can be very hard to make sure a object is always released just once in all possible execution paths.
This is the reason for RAII: http://en.wikipedia.org/wiki/RAII
Making a helper class with purpose of making sure that an object always deleted once in all execution paths.
Example of a class like this is: std::auto_ptr
But sometimes you like to share objects with other. It should only be deleted when none uses it anymore.
In order to help with that reference counting strategies have been developed but you still need to remember addref and release ref manually. In essence this is the same problem as new/delete.
That's why boost has developed boost::shared_ptr, it's reference counting smart pointer so you can share objects and not leak memory unintentionally.
With the addition of C++ tr1 this is now added to the c++ standard as well but its named std::tr1::shared_ptr<>.
I recommend using the standard shared pointer if possible. ptr_list, ptr_dequeue and so are IIRC specialized containers for pointer types. I ignore them for now.
So we can start from your example:
std::vector<gate*> G;
G.push_back(new ANDgate);
G.push_back(new ORgate);
for(unsigned i=0;i<G.size();++i)
{
G[i]->Run();
}
The problem here is now that whenever G goes out scope we leak the 2 objects added to G. Let's rewrite it to use std::tr1::shared_ptr
// Remember to include <memory> for shared_ptr
// First do an alias for std::tr1::shared_ptr<gate> so we don't have to
// type that in every place. Call it gate_ptr. This is what typedef does.
typedef std::tr1::shared_ptr<gate> gate_ptr;
// gate_ptr is now our "smart" pointer. So let's make a vector out of it.
std::vector<gate_ptr> G;
// these smart_ptrs can't be implicitly created from gate* we have to be explicit about it
// gate_ptr (new ANDgate), it's a good thing:
G.push_back(gate_ptr (new ANDgate));
G.push_back(gate_ptr (new ORgate));
for(unsigned i=0;i<G.size();++i)
{
G[i]->Run();
}
When G goes out of scope the memory is automatically reclaimed.
As an exercise which I plagued newcomers in my team with is asking them to write their own smart pointer class. Then after you are done discard the class immedietly and never use it again. Hopefully you acquired crucial knowledge on how a smart pointer works under the hood. There's no magic really.
It depends what you're going for. I believe the closest thing JS has to print is:
document.write( produceMessage() );
However, it may be more prudent to place the value inside a span or a div of your choosing like:
document.getElementById("mySpanId").innerHTML = produceMessage();
I know this is an old question but I stumbled upon this recently and it ended up misguiding me since the Subprocess API as changed since python 3.5.
The new way to execute external scripts is with the run
function, which runs the command described by args. Waits for command to complete, then returns a CompletedProcess instance.
import subprocess
subprocess.run(['./test.sh'])
To blank it:
myObject["myVar"]=null;
To remove it:
delete myObject["myVar"]
as you can see in duplicate answers
Your media ID is: 448979387270691659_45818965
This is how to get it.
photo448979387270691659_45818965
There should be your photo ID.
For some reason, this only seems to work with the popup, and not the actual image URL.
TRY
<?php
$rowID=$productid=$name=$price=$description="";
if (isset($_POST['submit'])) {
$rowID = $_POST['rowID'];
$productid = $_POST['productid']; //this is line 32 and so on...
$name = $_POST['name'];
$price = $_POST['price'];
$description = $_POST['description'];
}
Each of the images need to be the exact dimensions before you put them up otherwise bootstrap 4 will try to place them in a funky shape. Bootstrap also has something like Masonry on their documents that you can use if need be, you can see that here, http://v4-alpha.getbootstrap.com/components/card/#columns.
Simple.
To open a workbook. Use xlapp.workbooks.Open()
where you have previously declared and instanitated xlapp as so.. Excel.Application xlapp = new Excel.Applicaton();
parameters are correct.
Next make sure you use the property Value2 when assigning a value to the cell using either the cells property or the range object.
I'd go with window.location = "http://...";
. I've been coding cross-browser JavaScript for a few years, and I've never experienced problems using this approach.
window.navigate
and window.location.href
seems a bit odd to me.
There are currently a few options for using Python 3 with mysql:
https://pypi.python.org/pypi/mysql-connector-python
https://pypi.python.org/pypi/pymysql
MySQLdb
, after calling pymysql.install_as_MySQLdb()
https://pypi.python.org/pypi/cymysql
https://pypi.python.org/pypi/mysqlclient
python-mysqldb
andpython3-mysqldb
packages.benchmarks here: https://github.com/methane/mysql-driver-benchmarks
I had this same issue when working on an Ubuntu server.
I was getting the following error:
deploy@my-comp:~$ docker login -u my-username -p my-password
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
Error response from daemon: Get https://registry-1.docker.io/v2/: dial tcp 35.175.83.85:443: connect: connection refused
Here are the things I tried that did not work:
sudo docker systemctl restart docker
/etc/resolv.conf
fileHere's what worked for me:
I tried checking if the server has access to the internet using the following netcat
command:
nc -vz google.com 443
And it returned this output:
nc: connect to google.com port 443 (tcp) failed: Connection refused
nc: connect to google.com port 443 (tcp) failed: Network is unreachable
Instead of something like this:
Ncat: Version 7.70 ( https://nmap.org/ncat )
Ncat: Connected to 172.217.166.110:443.
Ncat: 0 bytes sent, 0 bytes received in 0.07 seconds.
I tried checking again if the server has access to the internet using the following wget
command:
wget -q --spider http://google.com ; echo $?
And it returned:
4
Instead of:
0
Note: Anything other than 0 in the output means your system is not connected to the internet
I then tried the last time if the server has access to the internet using the following Nmap
command:
nmap -p 443 google.com
And it returned:
Starting Nmap 7.01 ( https://nmap.org ) at 2021-02-16 11:50 WAT
Nmap scan report for google.com (216.58.223.238)
Host is up (0.00052s latency).
Other addresses for google.com (not scanned): 2c0f:fb50:4003:802::200e
rDNS record for 216.58.223.238: los02s04-in-f14.1e100.net
PORT STATE SERVICE
443/tcp closed https
Nmap done: 1 IP address (1 host up) scanned in 1.21 seconds
Instead something like this:
Starting Nmap 7.01 ( https://nmap.org ) at 2021-02-16 11:50 WAT
Nmap scan report for google.com (216.58.223.238)
Host is up (0.00052s latency).
Other addresses for google.com (not scanned): 2c0f:fb50:4003:802::200e
rDNS record for 216.58.223.238: los02s04-in-f14.1e100.net
PORT STATE SERVICE
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 1.21 seconds
Note: The state of port 443/tcp
is closed instead of open
All this was enough to make me realize that connections to the internet were not allowed on the server.
All I had to do was speak with the team in charge of infrastructure to fix the network connectivity issue to the internet on the server. And once that was fixed my docker command started working fine.
Resources: 9 commands to check if connected to internet with shell script examples
That's all.
I hope this helps
In addition to the above:
@Autowired
beans is Singleton whereas using JSR 330 @Inject
annotation it is like Spring's prototype.@Inject
.@Inject
.One other option would be to use something like this
SELECT *
FROM table t INNER JOIN
(
SELECT 'Text%' Col
UNION SELECT 'Link%'
UNION SELECT 'Hello%'
UNION SELECT '%World%'
) List ON t.COLUMN LIKE List.Col
Using coalesce() converts null to 0:
$query = Model::where('field1', 1)
->whereNull('field2')
->where(DB::raw('COALESCE(datefield_at,0)'), '<', $date)
;
Use its name()
method:
public class Main {
public static void main(String[] args) throws Exception {
System.out.println(Strings.ONE.name());
}
}
enum Strings {
ONE, TWO, THREE
}
yields ONE
.
/* See newState and use of it in eventSubmit() for resetting all the state. I have tested it is working for me. Please let me know for mistakes */
import React from 'react';
const newState = {
fullname: '',
email: ''
}
class Form extends React.Component {
constructor(props) {
super(props);
this.state = {
fullname: ' ',
email: ' '
}
this.eventChange = this
.eventChange
.bind(this);
this.eventSubmit = this
.eventSubmit
.bind(this);
}
eventChange(event) {
const target = event.target;
const value = target.type === 'checkbox'
? target.type
: target.value;
const name = target.name;
this.setState({[name]: value})
}
eventSubmit(event) {
alert(JSON.stringify(this.state))
event.preventDefault();
this.setState({...newState});
}
render() {
return (
<div className="container">
<form className="row mt-5" onSubmit={this.eventSubmit}>
<label className="col-md-12">
Full Name
<input
type="text"
name="fullname"
id="fullname"
value={this.state.fullname}
onChange={this.eventChange}/>
</label>
<label className="col-md-12">
email
<input
type="text"
name="email"
id="email"
value={this.state.value}
onChange={this.eventChange}/>
</label>
<input type="submit" value="Submit"/>
</form>
</div>
)
}
}
export default Form;
after running different aforementioned functions for factorial, by different people, turns out that math.factorial is the fastest to calculate the factorial.
find running times for different functions in the attached image
Create a temp file first.
File tempFile = File.createTempFile(prefix, suffix);
tempFile.deleteOnExit();
FileOutputStream out = new FileOutputStream(tempFile);
IOUtils.copy(in, out);
return tempFile;
Have a look on code below. Tested and found working on Mobile and Tablet devices.
<!-- 1. The <iframe> (video player) will replace this <div> tag. -->
<div id="player"></div>
<script>
// 2. This code loads the IFrame Player API code asynchronously.
var tag = document.createElement('script');
tag.src = "https://www.youtube.com/iframe_api";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
// 3. This function creates an <iframe> (and YouTube player)
// after the API code downloads.
var player;
function onYouTubeIframeAPIReady() {
player = new YT.Player('player', {
height: '390',
width: '640',
videoId: 'M7lc1UVf-VE',
events: {
'onReady': onPlayerReady,
'onStateChange': onPlayerStateChange
}
});
}
// 4. The API will call this function when the video player is ready.
function onPlayerReady(event) {
event.target.playVideo();
}
// 5. The API calls this function when the player's state changes.
// The function indicates that when playing a video (state=1),
// the player should play for six seconds and then stop.
var done = false;
function onPlayerStateChange(event) {
if (event.data == YT.PlayerState.PLAYING && !done) {
setTimeout(stopVideo, 6000);
done = true;
}
}
function stopVideo() {
player.stopVideo();
}
</script>
If you came here because you deal with class instances like me you can use static vars/methods to reference instances by a custom unique id:
class Person {
constructor( name ) {
this.name = name;
this.id = Person.ix++;
Person.stack[ this.id ] = this;
}
}
Person.ix = 0;
Person.stack = {};
Person.byId = id => Person.stack[ id ];
let store = {};
store[ new Person( "joe" ).id ] = true;
store[ new Person( "tim" ).id ] = true;
for( let id in store ) {
console.log( Person.byId( id ).name );
}
_x000D_
For Windows Forms one way is to use the SoundPlayer
private void Button_Click(object sender, EventArgs e)
{
using (var soundPlayer = new SoundPlayer(@"c:\Windows\Media\chimes.wav")) {
soundPlayer.Play(); // can also use soundPlayer.PlaySync()
}
}
This will also work with WPF, but you have other options like using MediaPlayer
MSDN page
On Windows OS:
1) open following file for edit (as an admin): C:\Windows\System32\drivers\etc\hosts
(this file has no extension)
2) on the bottom, add one line: 127.0.0.1 tools.google.com
3) save the file
4) enjoy old Chrome
import vs. include
The primary purpose of an import is to import a namespace. A more common use of the XSD import statement is to import a namespace which appears in another file. You might be gathering the namespace information from the file, but don't forget that it's the namespace that you're importing, not the file (don't confuse an import
statement with an include
statement).
Another area of confusion is how to specify the location or path of the included .xsd
file: An XSD import statement has an optional attribute named schemaLocation
but it is not necessary if the namespace of the import statement is at the same location (in the same file) as the import statement itself.
When you do chose to use an external .xsd
file for your WSDL, the schemaLocation
attribute becomes necessary. Be very sure that the namespace you use in the import statement is the same as the targetNamespace of the schema you are importing. That is, all 3 occurrences must be identical:
WSDL:
xs:import namespace="urn:listing3" schemaLocation="listing3.xsd"/>
XSD:
<xsd:schema targetNamespace="urn:listing3"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
Another approach to letting know the WSDL about the XSD is through Maven's pom.xml:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>xmlbeans-maven-plugin</artifactId>
<executions>
<execution>
<id>generate-sources-xmlbeans</id>
<phase>generate-sources</phase>
<goals>
<goal>xmlbeans</goal>
</goals>
</execution>
</executions>
<version>2.3.3</version>
<inherited>true</inherited>
<configuration>
<schemaDirectory>${basedir}/src/main/xsd</schemaDirectory>
</configuration>
</plugin>
You can read more on this in this great IBM article. It has typos such as xsd:import
instead of xs:import
but otherwise it's fine.
NEVER DELETE apply plugin: 'com.google.gms.google-services' from the gradle. Sometimes you are using com.google.gms:google-services:3.1.0 , without apply plugin: 'com.google.gms.google-services' your gradle build successfully. BUT IT IS COMPLETELY WRONG !!!! This error comes due to google-service.json file is not at the correct location. Go to your PROJECT TAB at left side above. If you display it as ANDROID make it PROJECT then check your google-service.json file is at this location. EXPAND app then see google-service.json file below the build.gradle. IF NOT PLACE IT THERE BY RIGHT CLICK ON THE app .
You can call the method like pump.getPumps()
. By adding @classmethod
decorator on the method. A class method receives the class as the implicit first argument, just like an instance method receives the instance.
class Pump:
def __init__(self):
print ("init") # never prints
@classmethod
def getPumps(cls):
# Open database connection
# some stuff here that never gets executed because of error
So, simply call Pump.getPumps()
.
In java, it is termed as static
method.
I had the same problem. I am using Phonegap and Jquery mobile, for Adroid devices. To resize properly I had to set a timeout:
$(window).bind('orientationchange',function(e) {
fixOrientation();
});
$(window).bind('resize',function(e) {
fixOrientation();
});
function fixOrientation() {
setTimeout(function() {
var windowWidth = window.innerWidth;
$('div[data-role="page"]').width(windowWidth);
$('div[data-role="header"]').width(windowWidth);
$('div[data-role="content"]').width(windowWidth-30);
$('div[data-role="footer"]').width(windowWidth);
},500);
}
I ran into a similar issue and it lead me here so I just wanted to leave my solution for anyone who experiences the same.
I found that if I ran cat /tmp/list.txt
the file would be empty, even though I was certain that there were contents being placed immediately in the file. Turns out if I put a sleep 1;
just before the cat /tmp/list.txt
it worked as expected. There must have been a delay between the time the file was created and the time it was written, or something along those lines.
My final code:
while [ ! -f /tmp/list.txt ];
do
sleep 1;
done;
sleep 1;
cat /tmp/list.txt;
Hope this helps save someone a frustrating half hour!
We can parse csv files with quoted strings and delimited by say | with following code
while read -r line
do
field1=$(echo "$line" | awk -F'|' '{printf "%s", $1}' | tr -d '"')
field2=$(echo "$line" | awk -F'|' '{printf "%s", $2}' | tr -d '"')
echo "$field1 $field2"
done < "$csvFile"
awk
parses the string fields to variables and tr
removes the quote.
Slightly slower as awk
is executed for each field.
As of right now that feature is not supported, however if this is something that bothers you an alternative would be in your package.json...
"scripts": {
"start": "ng serve --host foo.bar --port 80"
}
This way you can simply run npm start
Another option if you want to do this across multiple projects is to create an alias, which you can potentially name ngserve
which will execute your above command.
This worked for me:
"With the following test keys, you will always get No CAPTCHA and all verification requests will pass.
Site key: 6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI
Secret key: 6LeIxAcTAAAAAGG-vFI1TnRWxMZNFuojJ4WifJWe
The reCAPTCHA widget will show a warning message to claim that it's only for testing purpose. Please do not use these keys for your production traffic."
Extracted from here: https://developers.google.com/recaptcha/docs/faq#id-like-to-run-automated-tests-with-recaptcha.-what-should-i-do
BR!
I realize that this question is over 10 years old, but it appears to me that not only has the most obvious answer not been addressed, but that maybe its not really clear from the question a good understanding of what goes on under the covers. In addition, there are other questions about late binding and what that means with regards to delegates and lambdas (more on that later).
First to address the 800 lb elephant/gorilla in the room, when to choose event
vs Action<T>
/Func<T>
:
event
when you
want more of a pub/sub model with multiple
statements/lambdas/functions that will execute (this is a major
difference right off the bat).As an example of an event, lets wire up a simple and 'standard' set of events using a small console application as follows:
public delegate void FireEvent(int num);
public delegate void FireNiceEvent(object sender, SomeStandardArgs args);
public class SomeStandardArgs : EventArgs
{
public SomeStandardArgs(string id)
{
ID = id;
}
public string ID { get; set; }
}
class Program
{
public static event FireEvent OnFireEvent;
public static event FireNiceEvent OnFireNiceEvent;
static void Main(string[] args)
{
OnFireEvent += SomeSimpleEvent1;
OnFireEvent += SomeSimpleEvent2;
OnFireNiceEvent += SomeStandardEvent1;
OnFireNiceEvent += SomeStandardEvent2;
Console.WriteLine("Firing events.....");
OnFireEvent?.Invoke(3);
OnFireNiceEvent?.Invoke(null, new SomeStandardArgs("Fred"));
//Console.WriteLine($"{HeightSensorTypes.Keyence_IL030}:{(int)HeightSensorTypes.Keyence_IL030}");
Console.ReadLine();
}
private static void SomeSimpleEvent1(int num)
{
Console.WriteLine($"{nameof(SomeSimpleEvent1)}:{num}");
}
private static void SomeSimpleEvent2(int num)
{
Console.WriteLine($"{nameof(SomeSimpleEvent2)}:{num}");
}
private static void SomeStandardEvent1(object sender, SomeStandardArgs args)
{
Console.WriteLine($"{nameof(SomeStandardEvent1)}:{args.ID}");
}
private static void SomeStandardEvent2(object sender, SomeStandardArgs args)
{
Console.WriteLine($"{nameof(SomeStandardEvent2)}:{args.ID}");
}
}
The output will look as follows:
If you did the same with Action<int>
or Action<object, SomeStandardArgs>
, you would only see SomeSimpleEvent2
and SomeStandardEvent2
.
So whats going on inside of event
?
If we expand out FireNiceEvent
, the compiler is actually generating the following (I have omitted some details with respect to thread synchronization that isn't relevant to this discussion):
private EventHandler<SomeStandardArgs> _OnFireNiceEvent;
public void add_OnFireNiceEvent(EventHandler<SomeStandardArgs> handler)
{
Delegate.Combine(_OnFireNiceEvent, handler);
}
public void remove_OnFireNiceEvent(EventHandler<SomeStandardArgs> handler)
{
Delegate.Remove(_OnFireNiceEvent, handler);
}
public event EventHandler<SomeStandardArgs> OnFireNiceEvent
{
add
{
add_OnFireNiceEvent(value)
}
remove
{
remove_OnFireNiceEvent(value)
}
}
The compiler generates a private delegate variable which is not visible to the class namespace in which it is generated. That delegate is what is used for subscription management and late binding participation, and the public facing interface is the familiar +=
and -=
operators we have all come to know and love : )
You can customize the code for the add/remove handlers by changing the scope of the FireNiceEvent
delegate to protected. This now allows developers to add custom hooks to the hooks, such as logging or security hooks. This really makes for some very powerful features that now allows for customized accessibility to subscription based on user roles, etc. Can you do that with lambdas? (Actually you can by custom compiling expression trees, but that's beyond the scope of this response).
To address a couple of points from some of the responses here:
There really is no difference in the 'brittleness' between changing
the args list in Action<T>
and changing the properties in a class
derived from EventArgs
. Either will not only require a compile
change, they will both change a public interface and will require
versioning. No difference.
With respect to which is an industry standard, that depends on where
this is being used and why. Action<T>
and such is often used in IoC
and DI, and event
is often used in message routing such as GUI and
MQ type frameworks. Note that I said often, not always.
Delegates have different lifetimes than lambdas. One also has to be aware of capture... not just with closure, but also with the notion of 'look what the cat dragged in'. This does affect memory footprint/lifetime as well as management a.k.a. leaks.
One more thing, something I referenced earlier... the notion of late binding. You will often see this when using framework like LINQ, regarding when a lambda becomes 'live'. That is very different than late binding of a delegate, which can happen more than once (i.e. the lambda is always there, but binding occurs on demand as often as is needed), as opposed to a lambda, which once it occurs, its done -- the magic is gone, and the method(s)/property(ies) will always bind. Something to keep in mind.
Forget aboves for vscode exclude search pattern, try to below pattern it is working for any folder in vscode last version!
!../../../locales/*
for example i have searched like below vscode example clude settings
files to include: *.js
files to exclude: **/node_modules,!../../../locales/,!../../../theme/,!../../admin/client/*
You should try using date-fns. Here's how I did it using intervalToDuration and formatDuration functions from date-fns.
let startDate = Date.parse("2010-10-01 00:00:00 UTC");
let endDate = Date.parse("2020-11-01 00:00:00 UTC");
let duration = intervalToDuration({start: startDate, end: endDate});
let durationInWords = formatDuration(duration, {format: ["years", "months", "days"]}); //output: 10 years 1 month
JSoup solution is great, but if you need to extract just something really simple it may be easier to use regex or String.indexOf
As others have already mentioned the process is called scraping
If you mean an in-place sort (i.e. the list is updated):
people.Sort((x, y) => string.Compare(x.LastName, y.LastName));
If you mean a new list:
var newList = people.OrderBy(x=>x.LastName).ToList(); // ToList optional
Try this:
Send data and request with http header in page B to redirect to Gateway
<?php
$host = "www.example.com";
$path = "/path/to/script.php";
$data = "data1=value1&data2=value2";
$data = urlencode($data);
header("POST $path HTTP/1.1\\r\
" );
header("Host: $host\\r\
" );
header("Content-type: application/x-www-form-urlencoded\\r\
" );
header("Content-length: " . strlen($data) . "\\r\
" );
header("Connection: close\\r\
\\r\
" );
header($data);
?>
Additional Headers :
Accept: \*/\*
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/74.0.3729.169 Safari/537.36
Don't do: mkdir -m 777 -p a/b/c
since that will only set permission 777
on the last directory, c; a and b will be created with the default permission from your umask.
Instead to create any new directories with permission 777
, run mkdir -p
in a subshell where you override the umask:
(umask u=rwx,g=rwx,o=rwx && mkdir -p a/b/c)
Note that this won't change the permissions if any of a, b and c already exist though.
You can take a look here ( this is not a solution but the idea is here)
sample multi client with the google chat example
what you have to change/do :
separate server and client logique in different classes
for the client you need an object to manage one connect thread and on connected thread
for the server you need an object to manage one listening thread per client, and one connected thread per client
the server open a listening thread on each UUID (one per client)
each client try to connect to each uuid (the uuid already taken will fail the connection => first come first served)
Any question ?
You can raise a notice in Postgres
as follows:
raise notice 'Value: %', deletedContactId;
Read here
def isprime(n):
'''check if integer n is a prime'''
# make sure n is a positive integer
n = abs(int(n))
# 0 and 1 are not primes
if n < 2:
return False
# 2 is the only even prime number
if n == 2:
return True
# all other even numbers are not primes
if not n & 1:
return False
# range starts with 3 and only needs to go up
# the square root of n for all odd numbers
for x in range(3, int(n**0.5) + 1, 2):
if n % x == 0:
return False
return True
Taken from:
This code example may do what you want:
The JSON spec says you CAN escape forward slash, but you don't have to.
I think the best option is to implement like this:
public static int IndexOf<T>(this IEnumerable<T> enumerable, T element, IEqualityComparer<T> comparer = null)
{
int i = 0;
comparer = comparer ?? EqualityComparer<T>.Default;
foreach (var currentElement in enumerable)
{
if (comparer.Equals(currentElement, element))
{
return i;
}
i++;
}
return -1;
}
It will also not create the anonymous object
It looks like you're willing to strip fractions of a second... the problem is you can't use '00' as the hour with %I
>>> time.strptime('00:00:00,000'.split(',')[0],'%H:%M:%S')
time.struct_time(tm_year=1900, tm_mon=1, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=0, tm_yday=1, tm_isdst=-1)
>>>
A simple way to distinguish which <button> or <input type="button"...> is pressed, is by checking their 'id':
$("button").click(function() {
var id = $(this).attr('id');
...
});
In addition, use collections.Counter to refactor your code:
from collections import Counter
words = ['a', 'b', 'c', 'a']
Counter(words).keys() # equals to list(set(words))
Counter(words).values() # counts the elements' frequency
Output:
['a', 'c', 'b']
[2, 1, 1]
As a side note, the reason revoke usage on *.* from 'phpmyadmin'@'localhost';
does not work is quite simple : There is no grant called USAGE
.
The actual named grants are in the MySQL Documentation
The grant USAGE
is a logical grant. How? 'phpmyadmin'@'localhost' has an entry in mysql.user
where user='phpmyadmin' and host='localhost'. Any row in mysql.user semantically means USAGE
. Running DROP USER 'phpmyadmin'@'localhost';
should work just fine. Under the hood, it's really doing this:
DELETE FROM mysql.user WHERE user='phpmyadmin' and host='localhost';
DELETE FROM mysql.db WHERE user='phpmyadmin' and host='localhost';
FLUSH PRIVILEGES;
Therefore, the removal of a row from mysql.user
constitutes running REVOKE USAGE
, even though REVOKE USAGE
cannot literally be executed.
using SimpleDateFormat or DateFormat class through
for e.g.
try{
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy"); // here set the pattern as you date in string was containing like date/month/year
Date d = sdf.parse("20/12/2011");
}catch(ParseException ex){
// handle parsing exception if date string was different from the pattern applying into the SimpleDateFormat contructor
}