You can save image , save the file in your current directory application and move the file to any directory .
Bitmap btm = new Bitmap(image.width,image.height);
Image img = btm;
img.Save(@"img_" + x + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
FileInfo img__ = new FileInfo(@"img_" + x + ".jpg");
img__.MoveTo("myVideo\\img_" + x + ".jpg");
Generics
can be defined using Wrapper
classes only. If you don't want to define using Wrapper types, you may use the Raw definition as below
@SuppressWarnings("rawtypes")
public HashMap buildMap(String letters)
{
HashMap checkSum = new HashMap();
for ( int i = 0; i < letters.length(); ++i )
{
checkSum.put(letters.charAt(i), primes[i]);
}
return checkSum;
}
Or define the HashMap using wrapper types, and store the primitive types. The primitive values will be promoted to their wrapper types.
public HashMap<Character, Integer> buildMap(String letters)
{
HashMap<Character, Integer> checkSum = new HashMap<Character, Integer>();
for ( int i = 0; i < letters.length(); ++i )
{
checkSum.put(letters.charAt(i), primes[i]);
}
return checkSum;
}
You should use the SendAsync
method instead, this is a generic method, that serializes the input to the service
Widget widget = new Widget()
widget.Name = "test"
widget.Price = 1;
HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:44268/api/test");
client.SendAsync(new HttpRequestMessage<Widget>(widget))
.ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode() );
If you don't want to create the concrete class, you can make it with the FormUrlEncodedContent
class
var client = new HttpClient();
// This is the postdata
var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("Name", "test"));
postData.Add(new KeyValuePair<string, string>("Price ", "100"));
HttpContent content = new FormUrlEncodedContent(postData);
client.PostAsync("http://localhost:44268/api/test", content).ContinueWith(
(postTask) =>
{
postTask.Result.EnsureSuccessStatusCode();
});
Note: you need to make your id to a nullable int (int?
)
There are two syntax errors in your ternary conditional:
if
. Check the correct syntax here.You are missing a parenthesis in your code. If you format it like this:
{(this.props.schema.collectionName.length < 0 ?
(<Expandable></Expandable>)
: (<h1>hejsan</h1>)
)}
Hope this works!
java -classpath Predit.jar your.package.name.MainClass
Both GET and POST are used by the browser to request a single resource from the server. Each resource requires a separate GET or POST request.
The GET method is used in one of two ways: When no method is specified, that is when you or the browser is requesting a simple resource such as an HTML page, an image, etc. When a form is submitted, and you choose method=GET on the HTML tag. If the GET method is used with an HTML form, then the data collected through the form is sent to the server by appending a "?" to the end of the URL, and then adding all name=value pairs (name of the html form field and value entered in that field) separated by an "&" Example: GET /sultans/shop//form1.jsp?name=Sam%20Sultan&iceCream=vanilla HTTP/1.0 optional headeroptional header<< empty line >>>
The name=value form data will be stored in an environment variable called QUERY_STRING. This variable will be sent to a processing program (such as JSP, Java servlet, PHP etc.)
Example: POST /sultans/shop//form1.jsp HTTP/1.0 optional headeroptional header<< empty line >>> name=Sam%20Sultan&iceCream=vanilla
When using the post method, the QUERY_STRING environment variable will be empty. Advantages/Disadvantages of GET vs. POST
Advantages of the GET method: Slightly faster Parameters can be entered via a form or by appending them after the URL Page can be bookmarked with its parameters
Disadvantages of the GET method: Can only send 4K worth of data. (You should not use it when using a textarea field) Parameters are visible at the end of the URL
Advantages of the POST method: Parameters are not visible at the end of the URL. (Use for sensitive data) Can send more that 4K worth of data to server
Disadvantages of the POST method: Can cannot be bookmarked with its data
Here is a cleaner way getting Year/Month/Day with template literals:
var date = new Date();_x000D_
var formattedDate = `${date.getFullYear()}/${(date.getMonth() + 1)}/${date.getDate()}`;_x000D_
console.log(formattedDate);
_x000D_
Yes. The inheritance is public by default.
Syntax (example):
struct A { };
struct B : A { };
struct C : B { };
To remove the options of an HTML element of select
, you can utilize the remove()
method:
function removeOptions(selectElement) {
var i, L = selectElement.options.length - 1;
for(i = L; i >= 0; i--) {
selectElement.remove(i);
}
}
// using the function:
removeOptions(document.getElementById('DropList'));
It's important to remove the options
backwards; as the remove()
method rearranges the options
collection. This way, it's guaranteed that the element to be removed still exists!
You have a couple of problems here.
First, the XSD has an issue where an element is both named or referenced; in your case should be referenced.
Change:
<xsd:element name="stock" ref="Stock" minOccurs="1" maxOccurs="unbounded"/>
To:
<xsd:element name="stock" type="Stock" minOccurs="1" maxOccurs="unbounded"/>
And:
Stock
Stock
So:
<xsd:element name="Stock">
<xsd:complexType>
To:
<xsd:complexType name="Stock">
Make sure you fix the xml closing tags.
The second problem is that the correct way to reference an external XSD is to use XSD schema with import/include within a wsdl:types element. wsdl:import is reserved to referencing other WSDL files. More information is available by going through the WS-I specification, section WSDL and Schema Import. Based on WS-I, your case would be:
INCORRECT: (the way you showed it)
<?xml version="1.0" encoding="UTF-8"?>
<definitions targetNamespace="http://stock.com/schemas/services/stock/wsdl"
.....xmlns:external="http://stock.com/schemas/services/stock"
<import namespace="http://stock.com/schemas/services/stock" location="Stock.xsd" />
<message name="getStockQuoteResp">
<part name="parameters" element="external:getStockQuoteResponse" />
</message>
</definitions>
CORRECT:
<?xml version="1.0" encoding="UTF-8"?>
<definitions targetNamespace="http://stock.com/schemas/services/stock/wsdl"
.....xmlns:external="http://stock.com/schemas/services/stock"
<types>
<schema xmlns="http://www.w3.org/2001/XMLSchema">
<import namespace="http://stock.com/schemas/services/stock" schemaLocation="Stock.xsd" />
</schema>
</types>
<message name="getStockQuoteResp">
<part name="parameters" element="external:getStockQuoteResponse" />
</message>
</definitions>
SOME processors may support both syntaxes. The XSD you put out shows issues, make sure you first validate the XSD.
It would be better if you go the WS-I way when it comes to WSDL authoring.
Other issues may be related to the use of relative vs. absolute URIs in locating external content.
Here is a simple video recording example using the MediaRecorder:
public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback {
MediaRecorder recorder;
SurfaceHolder holder;
boolean recording = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
recorder = new MediaRecorder();
initRecorder();
setContentView(R.layout.main);
SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView);
holder = cameraView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
cameraView.setClickable(true);
cameraView.setOnClickListener(this);
}
private void initRecorder() {
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
CamcorderProfile cpHigh = CamcorderProfile
.get(CamcorderProfile.QUALITY_HIGH);
recorder.setProfile(cpHigh);
recorder.setOutputFile("/sdcard/videocapture_example.mp4");
recorder.setMaxDuration(50000); // 50 seconds
recorder.setMaxFileSize(5000000); // Approximately 5 megabytes
}
private void prepareRecorder() {
recorder.setPreviewDisplay(holder.getSurface());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
finish();
} catch (IOException e) {
e.printStackTrace();
finish();
}
}
public void onClick(View v) {
if (recording) {
recorder.stop();
recording = false;
// Let's initRecorder so we can record again
initRecorder();
prepareRecorder();
} else {
recording = true;
recorder.start();
}
}
public void surfaceCreated(SurfaceHolder holder) {
prepareRecorder();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
public void surfaceDestroyed(SurfaceHolder holder) {
if (recording) {
recorder.stop();
recording = false;
}
recorder.release();
finish();
}
}
It's from my book: Pro Android Media: Developing Graphics, Music, Video, and Rich Media Apps for Smartphones and Tablets
Also, do not forget to include these permissions in manifest:
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Yes it is correct. you can do it with an inner class.
I optimized the javascript code from cameronjonesweb a little bit. Now you can just add the clips into the array. Everything else is done automatically.
<video autoplay controls id="Player" src="http://www.w3schools.com/html/movie.mp4" onclick="this.paused ? this.play() : this.pause();">Your browser does not support the video tag.</video>
<script>
var nextsrc = ["http://www.w3schools.com/html/movie.mp4","http://www.w3schools.com/html/mov_bbb.mp4"];
var elm = 0; var Player = document.getElementById('Player');
Player.onended = function(){
if(++elm < nextsrc.length){
Player.src = nextsrc[elm]; Player.play();
}
}
</script>
Toggle: 0/1 or else
<input type="checkbox" id="nolunch" />
<input id="checklunch />"
$('#nolunch').change(function () {
if ($(this).is(':checked')) {
$('#checklunch').val('1');
};
if ($(this).is(':checked') == false) {
$('#checklunch').val('0');
};
});
Also, It can be done with LINQ
var str = "Hello@Hello&Hello(Hello)";
var characters = str.Select(c => char.IsLetter(c) ? c : ',')).ToArray();
var output = new string(characters);
Console.WriteLine(output);
Use the ToString() method - standard and custom numeric format strings. Have a look at the MSDN article How to: Pad a Number with Leading Zeros.
string text = no.ToString("0000");
There is no builtin function, but you can easily achieve it by calling the functions min()
and max()
appropriately.
// Limit integer between 1 and 100000
$var = max(min($var, 100000), 1);
You can use this. Its Tested code
select {
background: url(http://cdn1.iconfinder.com/data/icons/cc_mono_icon_set/blacks/16x16/br_down.png) no-repeat right !important;
appearance: none !important;
background-size: 25px 25px !important;
background-position: 99% 50% !important;
}
Another great implementation is balupton's jQuery History which will use the native onhashchange event if it is supported by the browser, if not it will use an iframe or interval appropriately for the browser to ensure all the expected functionality is successfully emulated. It also provides a nice interface to bind to certain states.
Another project worth noting as well is jQuery Ajaxy which is pretty much an extension for jQuery History to add ajax to the mix. As when you start using ajax with hashes it get's quite complicated!
Linux
To impress your friends
ps aux | grep -i node | awk '{print $2}' | xargs kill -9
But this is the one you will remember
killall node
I am already using BeyondCompare (commercial) for diffs and merges, and this tool also has the capability to create, view and apply patches.
With the global configuration that you have defined for the exec-maven-plugin:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.4.0</version>
<configuration>
<mainClass>org.dhappy.test.NeoTraverse</mainClass>
</configuration>
</plugin>
invoking mvn exec:java
on the command line will invoke the plugin which is configured to execute the class org.dhappy.test.NeoTraverse
.
So, to trigger the plugin from the command line, just run:
mvn exec:java
Now, if you want to execute the exec:java
goal as part of your standard build, you'll need to bind the goal to a particular phase of the default lifecycle. To do this, declare the phase
to which you want to bind the goal in the execution
element:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<id>my-execution</id>
<phase>package</phase>
<goals>
<goal>java</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>org.dhappy.test.NeoTraverse</mainClass>
</configuration>
</plugin>
With this example, your class would be executed during the package
phase. This is just an example, adapt it to suit your needs. Works also with plugin version 1.1.
I had the same problem recently and this helped me:
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="FILENAME"');
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize("PATH/TO/FILE"));
ob_clean();
flush();
readfile(PATH/TO/FILE);
exit();
I found this answer here
Just several days ago, I met the same question just like yours. All code runs well on my local machine, but turns out error(noclassdeffound&initialize). So I post my solution, but I don't know why, I merely advance a possibility. I hope someone know will explain this.@John Vint Firstly, I'll show you my problem. My code has static variable and static block both. When I first met this problem, I tried John Vint's solution, and tried to catch the exception. However, I caught nothing. So I thought it is because the static variable(but now I know they are the same thing) and still found nothing. So, I try to find the difference between the linux machine and my computer. Then I found that this problem happens only when several threads run in one process(By the way, the linux machine has double cores and double processes). That means if there are two tasks(both uses the code which has static block or variables) run in the same process, it goes wrong, but if they run in different processes, both of them are ok. In the Linux machine, I use
mvn -U clean test -Dtest=path
to run a task, and because my static variable is to start a container(or maybe you initialize a new classloader), so it will stay until the jvm stop, and the jvm stops only when all the tasks in one process stop. Every task will start a new container(or classloader) and it makes the jvm confused. As a result, the error happens. So, how to solve it? My solution is to add a new command to the maven command, and make every task go to the same container.
-Dxxx.version=xxxxx #sorry can't post more
Maybe you have already solved this problem, but still hope it will help others who meet the same problem.
The code you have posted here and code on your site both are different. There is a break <br>
after second image, so the third image into new line, remove this <br>
and it will display correctly.
Although not exactly answering the question as formulated, but if you need or can take the end result as string you can also use
string s = Char.ConvertFromUtf32(56);
which will give you surrogate UTF-16 pairs if needed, protecting you if you are out side of the BMP.
TJ's answer is excellent but I ran into one scenario where my HTML was already rendered and the document.write script would overwrite all of the page contents with just the date year.
For this scenario, you can append a text node to the existing element using the following code:
<div>
©
<span id="copyright">
<script>document.getElementById('copyright').appendChild(document.createTextNode(new Date().getFullYear()))</script>
</span>
Company Name
</div>
If you have spaces in the filename, try these:
[file](./file%20with%20spaces.md)
[file](<./file with spaces.md>)
First one seems more reliable
I found a fairly robust solution at https://gallery.technet.microsoft.com/scriptcenter/c0c57332-8624-48c0-b4c3-5b31fe641c58 , which I thought was worth pointing out. It searches columns of these types: varchar, char, nvarchar, nchar, text. It works great and supports specific table-searching as well as multiple search-terms.
You can do it using xml as well:
<field name="acmeOne" type="string" column="acmeOne" length="36">
<options>
<option name="comment">Your SQL field comment goes here.</option>
<option name="default">Default Value</option>
</options>
</field>
Using pretty much any modern browser you need to learn the Network tab. See this SO post about How to debug AJAX calls.
The \#include
files of gcc are stored in /usr/include
.
The standard include files of g++ are stored in /usr/include/c++
.
You can use a static Map in your enum that maps Strings to enum constants. Use it in a 'getEnum' static method. This skips the need to iterate through the enums each time you want to get one from its String value.
public enum RandomEnum {
StartHere("Start Here"),
StopHere("Stop Here");
private final String strVal;
private RandomEnum(String strVal) {
this.strVal = strVal;
}
public static RandomEnum getEnum(String strVal) {
if(!strValMap.containsKey(strVal)) {
throw new IllegalArgumentException("Unknown String Value: " + strVal);
}
return strValMap.get(strVal);
}
private static final Map<String, RandomEnum> strValMap;
static {
final Map<String, RandomEnum> tmpMap = Maps.newHashMap();
for(final RandomEnum en : RandomEnum.values()) {
tmpMap.put(en.strVal, en);
}
strValMap = ImmutableMap.copyOf(tmpMap);
}
@Override
public String toString() {
return strVal;
}
}
Just make sure the static initialization of the map occurs below the declaration of the enum constants.
BTW - that 'ImmutableMap' type is from the Google guava API, and I definitely recommend it in cases like this.
EDIT - Per the comments:
Just a small observation: you keep mentioning conn usr\pass, and this is a typo, right? Cos it should be conn usr/pass. Or is it different on a Unix based OS?
Furthermore, just to be sure: if you use tnsnames, your login string will look different from when you use the login method you started this topic out with.
tnsnames.ora should be in $ORACLE_HOME$\network\admin. That is the Oracle home on the machine from which you are trying to connect, so in your case your PC. If you have multiple oracle_homes and wish to use only one tnsnames.ora, you can set environment variable tns_admin (e.g. set TNS_ADMIN=c:\oracle\tns), and place tnsnames.ora in that directory.
Your original method of logging on (usr/[email protected]:port/servicename) should always work. So far I think you have all the info, except for the port number, which I am sure your DBA will be able to give you. If this method still doesn't work, either the server's IP address is not available from your client, or it is a firewall issue (blocking a certain port), or something else not (directly) related to Oracle or SQL*Plus.
hth! Regards, Remco
You can create your own JSONObject
then toString()
.
Remember run it in the background thread like doInBackground
in AsyncTask
.
OkHttp version > 4:
// create your json here
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("KEY1", "VALUE1");
jsonObject.put("KEY2", "VALUE2");
} catch (JSONException e) {
e.printStackTrace();
}
val client = OkHttpClient()
val mediaType = "application/json; charset=utf-8".toMediaType()
val body = jsonObject.toString().toRequestBody(mediaType)
val request: Request = Request.Builder()
.url("https://YOUR_URL/")
.post(body)
.build()
var response: Response? = null
try {
response = client.newCall(request).execute()
val resStr = response.body!!.string()
} catch (e: IOException) {
e.printStackTrace()
}
OkHttp version 3:
// create your json here
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("KEY1", "VALUE1");
jsonObject.put("KEY2", "VALUE2");
} catch (JSONException e) {
e.printStackTrace();
}
OkHttpClient client = new OkHttpClient();
MediaType JSON = MediaType.parse("application/json; charset=utf-8");
// put your json here
RequestBody body = RequestBody.create(JSON, jsonObject.toString());
Request request = new Request.Builder()
.url("https://YOUR_URL/")
.post(body)
.build();
Response response = null;
try {
response = client.newCall(request).execute();
String resStr = response.body().string();
} catch (IOException e) {
e.printStackTrace();
}
Let's say you have a string:
var string = "potatoes + carrots"
And you want to replace the word "potatoes" in that string with "tomatoes"
string = string.replacingOccurrences(of: "potatoes", with: "tomatoes", options: NSString.CompareOptions.literal, range: nil)
If you print your string, it will now be: "tomatoes + carrots"
If you want to remove the word potatoes from the sting altogether, you can use:
string = string.replacingOccurrences(of: "potatoes", with: "", options: NSString.CompareOptions.literal, range: nil)
If you want to use some other characters in your sting, use:
- Null Character (\0)
- Backslash (\)
- Horizontal Tab (\t)
- Line Feed (\n)
- Carriage Return (\r)
- Double Quote (\")
- Single Quote (\')
Example:
string = string.replacingOccurrences(of: "potatoes", with: "dog\'s toys", options: NSString.CompareOptions.literal, range: nil)
Output: "dog's toys + carrots"
Here is one that we have saved off to findcol.sql so we can run it easily from within SQLPlus
set verify off
clear break
accept colnam prompt 'Enter Column Name (or part of): '
set wrap off
select distinct table_name,
column_name,
data_type || ' (' ||
decode(data_type,'LONG',null,'LONG RAW',null,
'BLOB',null,'CLOB',null,'NUMBER',
decode(data_precision,null,to_char(data_length),
data_precision||','||data_scale
), data_length
) || ')' data_type
from all_tab_columns
where column_name like ('%' || upper('&colnam') || '%');
set verify on
You can eliminate the client from the problem by using wftech, this is an old tool but I have found it useful in diagnosing authentication issues. wfetch allows you to specify NTLM, Negotiate and kerberos, this may well help you better understand your problem. As you are trying to call a service and wfetch knows nothing about WCF, I would suggest applying your endpoint binding (PROVIDERSSoapBinding) to the serviceMetadata then you can do an HTTP GET of the WSDL for the service with the same security settings.
Another option, which may be available to you is to force the server to use NTLM, you can do this by either editing the metabase (IIS 6) and removing the Negotiate setting, more details at http://support.microsoft.com/kb/215383.
If you are using IIS 7.x then the approach is slightly different, details of how to configure the authentication providers are here http://www.iis.net/configreference/system.webserver/security/authentication/windowsauthentication.
I notice that you have blocked out the server address with xxx.xx.xx.xxx, so I'm guessing that this is an IP address rather than a server name, this may cause issues with authentication, so if possible try targeting the machine name.
Sorry that I haven't given you the answer but rather pointers for getting closer to the issue, but I hope it helps.
I'll finish by saying that I have experienced this same issue and my only recourse was to use Kerberos rather than NTLM, don't forget you'll need to register an SPN for the service if you do go down this route.
Did you see this? If I haven't misunderstand that answer, you may try to create a new virtualenv on top of the old one. You just need to know which python is going to use your virtualenv (you will need to see your virtualenv version).
If your virtualenv is installed with the same python version of the old one and upgrading your virtualenv package is not an option, you may want to read this in order to install a virtualenv with the python version you want.
EDIT
I've tested this approach (the one that create a new virtualenv on top of the old one) and it worked fine for me. I think you may have some problems if you change from python 2.6 to 2.7 or 2.7 to 3.x but if you just upgrade inside the same version (staying at 2.7 as you want) you shouldn't have any problem, as all the packages are held in the same folders for both python versions (2.7.x and 2.7.y packages are inside your_env/lib/python2.7/).
If you change your virtualenv python version, you will need to install all your packages again for that version (or just link the packages you need into the new version packages folder, i.e: your_env/lib/python_newversion/site-packages)
The Trust anchor error can happen for a lot of reasons. For me it was simply that I was trying to access https://example.com/
instead of https://www.example.com/
.
So you might want to double-check your URLs before starting to build your own Trust Manager (like I did).
In your template, you have access to all the variables that are members of the current $scope
. So, tobedone
should be $scope.tobedone
, and then you can display it with {{tobedone}}
, or [[tobedone]]
in your case.
Found a very easy way to do this.
Paste following php script in box. In php script set API_ACCESS_KEY, set device ids separated by coma.
Press F9 or click Run.
Have fun ;)
<?php
// API access key from Google API's Console
define( 'API_ACCESS_KEY', 'YOUR-API-ACCESS-KEY-GOES-HERE' );
$registrationIds = array("YOUR DEVICE IDS WILL GO HERE" );
// prep the bundle
$msg = array
(
'message' => 'here is a message. message',
'title' => 'This is a title. title',
'subtitle' => 'This is a subtitle. subtitle',
'tickerText' => 'Ticker text here...Ticker text here...Ticker text here',
'vibrate' => 1,
'sound' => 1
);
$fields = array
(
'registration_ids' => $registrationIds,
'data' => $msg
);
$headers = array
(
'Authorization: key=' . API_ACCESS_KEY,
'Content-Type: application/json'
);
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://android.googleapis.com/gcm/send' );
curl_setopt( $ch,CURLOPT_POST, true );
curl_setopt( $ch,CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false );
curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fields ) );
$result = curl_exec($ch );
curl_close( $ch );
echo $result;
?>
For FCM, google url would be: https://fcm.googleapis.com/fcm/send
For FCM v1 google url would be: https://fcm.googleapis.com/v1/projects/YOUR_GOOGLE_CONSOLE_PROJECT_ID/messages:send
Note: While creating API Access Key on google developer console, you have to use 0.0.0.0/0 as ip address. (For testing purpose).
In case of receiving invalid Registration response from GCM server, please cross check the validity of your device token. You may check the validity of your device token using following url:
https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=YOUR_DEVICE_TOKEN
Some response codes:
Following is the description of some response codes you may receive from server.
{ "message_id": "XXXX" } - success
{ "message_id": "XXXX", "registration_id": "XXXX" } - success, device registration id has been changed mainly due to app re-install
{ "error": "Unavailable" } - Server not available, resend the message
{ "error": "InvalidRegistration" } - Invalid device registration Id
{ "error": "NotRegistered"} - Application was uninstalled from the device
For me, setting Project ? Targets/[Your project] ? General ? Team to "None" solved the issue.
The xor operator is ^
For example: SELECT A ^ B
where A and B are integer category data types.
Lets say your HTML looks something like this:
<div class="box">
<!-- stuff -->
<p class="bet_time">Bet 5 days ago</p>
</div>
Then, with CSS, you can make that text appear in the bottom right like so:
.box {
position:relative;
}
.bet_time {
position:absolute;
bottom:0;
right:0;
}
The way this works is that absolutely positioned elements are always positioned with respect to the first relatively positioned parent element, or the window. Because we set the box's position to relative, .bet_time
positions its right edge to the right edge of .box
and its bottom edge to the bottom edge of .box
This will find the first parent with class box
then find the first child class with regex matching something
and get the id.
$(".mylink").closest(".box").find('[class*="something"]').first().attr("id")
I had same problem and found that you can just apply the [JsonIgnore]
attribute to the navigation property you don't want to be serialised. It will still serialise both the parent and child entities but just avoids the self referencing loop.
When working with Docker Compose, you can use command: postgres -c option=value
in your docker-compose.yml
to configure Postgres.
For example, this makes Postgres log to a file:
command: postgres -c logging_collector=on -c log_destination=stderr -c log_directory=/logs
Adapting Vojtech Vitek's answer, you can use
command: postgres -c config_file=/etc/postgresql.conf
to change the config file Postgres will use. You'd mount your custom config file with a volume:
volumes:
- ./customPostgresql.conf:/etc/postgresql.conf
Here's the docker-compose.yml
of my application, showing how to configure Postgres:
# Start the app using docker-compose pull && docker-compose up to make sure you have the latest image
version: '2.1'
services:
myApp:
image: registry.gitlab.com/bullbytes/myApp:latest
networks:
- myApp-network
db:
image: postgres:9.6.1
# Make Postgres log to a file.
# More on logging with Postgres: https://www.postgresql.org/docs/current/static/runtime-config-logging.html
command: postgres -c logging_collector=on -c log_destination=stderr -c log_directory=/logs
environment:
# Provide the password via an environment variable. If the variable is unset or empty, use a default password
- POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-4WXUms893U6j4GE&Hvk3S*hqcqebFgo!vZi}
# If on a non-Linux OS, make sure you share the drive used here. Go to Docker's settings -> Shared Drives
volumes:
# Persist the data between container invocations
- postgresVolume:/var/lib/postgresql/data
- ./logs:/logs
networks:
myApp-network:
# Our application can communicate with the database using this hostname
aliases:
- postgresForMyApp
networks:
myApp-network:
driver: bridge
# Creates a named volume to persist our data. When on a non-Linux OS, the volume's data will be in the Docker VM
# (e.g., MobyLinuxVM) in /var/lib/docker/volumes/
volumes:
postgresVolume:
Note that when on Linux, the log directory on the host must have the right permissions. Otherwise you'll get the slightly misleading error
FATAL: could not open log file "/logs/postgresql-2017-02-04_115222.log": Permission denied
I say misleading, since the error message suggests that the directory in the container has the wrong permission, when in reality the directory on the host doesn't permit writing.
To fix this, I set the correct permissions on the host using
chgroup ./logs docker && chmod 770 ./logs
MockMultipartFile exists for this purpose. As in your snippet if the file path is known, the below code works for me.
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.springframework.mock.web.MockMultipartFile;
Path path = Paths.get("/path/to/the/file.txt");
String name = "file.txt";
String originalFileName = "file.txt";
String contentType = "text/plain";
byte[] content = null;
try {
content = Files.readAllBytes(path);
} catch (final IOException e) {
}
MultipartFile result = new MockMultipartFile(name,
originalFileName, contentType, content);
You might need to allow different combinations of data in your intent filter to get it to work in different cases (http/
vs https/
, www.
vs no www.
, etc).
For example, I had to do the following for an app which would open when the user opened a link to Google Drive forms (www.docs.google.com/forms
)
Note that path prefix is optional.
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" />
<data android:scheme="https" />
<data android:host="www.docs.google.com" />
<data android:host="docs.google.com" />
<data android:pathPrefix="/forms" />
</intent-filter>
In general error is which nobody can control or guess when it occurs.Exception can be guessed and can be handled. In Java Exception and Error are sub class of Throwable.It is differentiated based on the program control.Error such as OutOfMemory Error which no programmer can guess and can handle it.It depends on dynamically based on architectire,OS and server configuration.Where as Exception programmer can handle it and can avoid application's misbehavior.For example if your code is looking for a file which is not available then IOException is thrown.Such instances programmer can guess and can handle it.
It's already an array of C-style strings:
#include <iostream>
#include <string>
#include <vector>
int main(int argc, char *argv[]) // Don't forget first integral argument 'argc'
{
std::string current_exec_name = argv[0]; // Name of the current exec program
std::vector<std::string> all_args;
if (argc > 1) {
all_args.assign(argv + 1, argv + argc);
}
}
Argument argc
is count of arguments plus the current exec file.
You could use ng-init in an outer div:
<div ng-init="param='value';">
<div ng-controller="BasketController" >
<label>param: {{value}}</label>
</div>
</div>
The parameter will then be available in your controller's scope:
function BasketController($scope) {
console.log($scope.param);
}
I'd use a couple of tiny images. Would look better too.
Alternatively, you can try the Character Map utility that comes with Windows or try looking here.
Another solution I've seen is to use the Wingdings font for symbols. That has a lot fo arrows.
let’s try visualizing this concept.
<? super SomeType>
is an “undefined(yet)” type, but that undefined type should be a superclass of the ‘SomeType’ class.
The same goes for <? extends SomeType>
. It’s a type that should extend the ‘SomeType’ class (it should be a child class of the ‘SomeType’ class).
If we consider the concept of 'class inheritance' in a Venn diagram, an example would be like this:
Mammal class extends Animal class (Animal class is a superclass of Mammal class).
Cat/Dog class extends Mammal class (Mammal class is a superclass of Cat/Dog class).
Then, let’s think about the ‘circles’ in the above diagram as a ‘box’ that has a physical volume.
You CAN’T put a bigger box into a smaller one.
You can ONLY put a smaller box into a bigger one.
When you say <? super SomeType>
, you wanna describe a ‘box’ that is the same size or bigger than the ‘SomeType’ box.
If you say <? extends SomeType>
, then you wanna describe a ‘box’ that is the same size or smaller than the ‘SomeType’ box.
so what is PECS anyway?
An example of a ‘Producer’ is a List which we only read from.
An example of a ‘Consumer’ is a List which we only write into.
Just keep in mind this:
We ‘read’ from a ‘producer’, and take that stuff into our own box.
And we ‘write’ our own box into a ‘consumer’.
So, we need to read(take) something from a ‘producer’ and put that into our ‘box’. This means that any boxes taken from the producer should NOT be bigger than our ‘box’. That’s why “Producer Extends.”
“Extends” means a smaller box(smaller circle in the Venn diagram above). The boxes of a producer should be smaller than our own box, because we are gonna take those boxes from the producer and put them into our own box. We can’t put anything bigger than our box!
Also, we need to write(put) our own ‘box’ into a ‘consumer’. This means that the boxes of the consumer should NOT be smaller than our own box. That’s why “Consumer Super.”
“Super” means a bigger box(bigger circle in the Venn diagram above). If we want to put our own boxes into a consumer, the boxes of the consumer should be bigger than our box!
Now we can easily understand this example:
public class Collections {
public static <T> void copy(List<? super T> dest, List<? extends T> src) {
for (int i = 0; i < src.size(); i++)
dest.set(i, src.get(i));
}
}
In the above example, we want to read(take) something from src
and write(put) them into dest
. So the src
is a “Producer” and its “boxes” should be smaller(more specific) than some type T
.
Vice versa, the dest
is a “Consumer” and its “boxes” should be bigger(more general) than some type T
.
If the “boxes” of the src
were bigger than that of the dest
, we couldn’t put those big boxes into the smaller boxes the dest
has.
If anyone reads this, I hope it helps you better understand “Producer Extends, Consumer Super.”
Happy coding! :)
if you got an error
Execution failed for task ‘:app:fabricGenerateResourcesDebug’. Crashlytics Developer Tools error.
remove also this line:
apply plugin: 'io.fabric'
In your Manifest file, for each Activity that you want to lock the screen rotation add: if you want to lock it in horizontal mode:
<activity
...
...
android:screenOrientation="landscape">
or if you want to lock it in vertical mode:
<activity
...
...
android:screenOrientation="portrait">
For Data access you can use OData. Here is a demo where Scott Hanselman creates an OData front end to StackOverflow database in 30 minutes, with XML and JSON access: Creating an OData API for StackOverflow including XML and JSON in 30 minutes.
For administrative access, like phpMyAdmin package, there is no well established one. You may give a try to IIS Database Manager.
You can accomplish that now with display: grid
:
.list {_x000D_
display: grid;_x000D_
overflow: hidden;_x000D_
grid-template-columns: repeat(3, 1fr);_x000D_
grid-auto-rows: 1fr;_x000D_
grid-column-gap: 5px;_x000D_
grid-row-gap: 5px;_x000D_
max-width: 500px;_x000D_
}_x000D_
.list-item {_x000D_
background-color: #ccc;_x000D_
display: flex;_x000D_
padding: 0.5em;_x000D_
margin-bottom: 20px;_x000D_
}_x000D_
.list-content {_x000D_
width: 100%;_x000D_
}
_x000D_
<ul class="list">_x000D_
<li class="list-item">_x000D_
<div class="list-content">_x000D_
<h2>box 1</h2>_x000D_
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>_x000D_
</div>_x000D_
</li>_x000D_
<li class="list-item">_x000D_
<div class="list-content">_x000D_
<h3>box 2</h3>_x000D_
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>_x000D_
</div>_x000D_
</li>_x000D_
_x000D_
<li class="list-item">_x000D_
<div class="list-content">_x000D_
<h3>box 2</h3>_x000D_
<p>Lorem ipsum dolor</p>_x000D_
</div>_x000D_
</li>_x000D_
_x000D_
<li class="list-item">_x000D_
<div class="list-content">_x000D_
<h3>box 2</h3>_x000D_
<p>Lorem ipsum dolor</p>_x000D_
</div>_x000D_
</li>_x000D_
<li class="list-item">_x000D_
<div class="list-content">_x000D_
<h1>h1</h1>_x000D_
</div>_x000D_
</li>_x000D_
</ul>
_x000D_
Although the grid itself is not flexbox, it behaves very similar to a flexbox container, and the items inside the grid can be flex.
The grid layout is also very handy in the case you want responsive grids. That is, if you want the grid to have a different number of columns per row you can then just change grid-template-columns
:
grid-template-columns: repeat(1, 1fr); // 1 column
grid-template-columns: repeat(2, 1fr); // 2 columns
grid-template-columns: repeat(3, 1fr); // 3 columns
and so on...
You can mix it with media queries and change according to the size of the page.
Sadly there is still no support for container queries / element queries in the browsers (out of the box) to make it work well with changing the number of columns according to the container size, not to the page size (this would be great to use with reusable webcomponents).
More information about the grid layout:
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout
Support of the Grid Layout accross browsers:
You are dividing integers then converting to float. Divide by floats instead.
As a bonus, use the awesome string formatting methods described here: http://docs.python.org/library/string.html#format-specification-mini-language
To specify a percent conversion and precision.
>>> float(1) / float(3)
[Out] 0.33333333333333331
>>> 1.0/3.0
[Out] 0.33333333333333331
>>> '{0:.0%}'.format(1.0/3.0) # use string formatting to specify precision
[Out] '33%'
>>> '{percent:.2%}'.format(percent=1.0/3.0)
[Out] '33.33%'
A great gem!
Let's try to take an example and understand:
I have a branch, say master, pointing to X <commit-id>, and I have a new branch pointing to Y <sha1>.
Where Y <commit-id> = <master> branch commits - few commits
Now say for Y branch I have to gap-close the commits between the master branch and the new branch. Below is the procedure we can follow:
Step 1:
git checkout -b local origin/new
where local is the branch name. Any name can be given.
Step 2:
git merge origin/master --no-ff --stat -v --log=300
Merge the commits from master branch to new branch and also create a merge commit of log message with one-line descriptions from at most <n> actual commits that are being merged.
For more information and parameters about Git merge, please refer to:
git merge --help
Also if you need to merge a specific commit, then you can use:
git cherry-pick <commit-id>
What you request is quite a costy operation, make sure you don't need to do it often (e.g in a cycle).
If you need it to stay sorted and you update it frequently, you can create a custom collection. For example, I came up with one that has your TreeBidiMap
and TreeMultiset
under the hood. Implement only what you need and care about data integrity.
class MyCustomCollection implements Map<K, V> {
TreeBidiMap<K, V> map;
TreeMultiset<V> multiset;
public V put(K key, V value) {
removeValue(map.put(key, value));
multiset.add(value);
}
public boolean remove(K key) {
removeValue(map.remove(key));
}
/** removes value that was removed/replaced in map */
private removeValue(V value) {
if (value != null) {
multiset.remove(value);
}
}
public Set<K> keySet() {
return Collections.unmodifiableSet(map.keySet());
}
public Collection<V> values() {
return Collections.unmodifiableCollection(multiset);
}
// many more methods to be implemented, e.g. count, isEmpty etc.
// but these are fairly simple
}
This way, you have a sorted Multiset
returned from values()
. However, if you need it to be a list (e.g. you need the array-like get(index)
method), you'd need something more complex.
For brevity, I only return unmodifiable collections. What @Lino mentioned is correct, and modifying the keySet
or values
collection as it is would make it inconsistent. I don't know any consistent way to make the values
mutable, but the keySet
could support remove
if it uses the remove
method from the MyCustomCollection
class above.
import java.util.ArrayList;
public class TestClass {
public static void main(String[] args) {
ArrayList<ArrayList<String>> listOLists = new ArrayList<ArrayList<String>>();
ArrayList<String> List_1 = new ArrayList<String>();
List_1.add("1");
List_1.add("2");
listOLists.add(List_1);
ArrayList<String> List_2 = new ArrayList<String>();
List_2.add("4");
List_2.add("5");
List_2.add("10");
List_2.add("11");
listOLists.add(List_2);
for (int i = 0; i < listOLists.size(); i++) {
System.out.print("list " + i + " :");
for (int j = 0; j < listOLists.get(i).size(); j++) {
System.out.print(listOLists.get(i).get(j) + " ;");
}
System.out.println();
}
}
}
Use this CSS to make full screen backgound in a web page.
body {
margin:0;
padding:0;
background:url("https://static.vecteezy.com/system/resources/previews/000/106/719/original/vector-abstract-blue-wave-background.jpg") no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
Using a cookie would probably be the best way to do this.
You could have a checkbox for 'Remember me?' and have the form create a cookie to store the //user's login// info. EDIT: User Session Information
To create a cookie, you'll need to process the login form with PHP.
A complete C++ code example, may be helpful for the beginners
#include <iostream>
#include <string>
#include "opencv/highgui.h"
using namespace std;
using namespace cv;
int main()
{
cv:Mat M(102,201,CV_8UC1);
int rows = M.rows;
int cols = M.cols;
cout<<rows<<" "<<cols<<endl;
cv::Size sz = M.size();
rows = sz.height;
cols = sz.width;
cout<<rows<<" "<<cols<<endl;
cout<<sz<<endl;
return 0;
}
The agg
function will do this for you. Pass the columns and function as a dict with column, output:
df.groupby(['Country', 'Item_Code']).agg({'Y1961': np.sum, 'Y1962': [np.sum, np.mean]}) # Added example for two output columns from a single input column
This will display only the group by columns, and the specified aggregate columns. In this example I included two agg functions applied to 'Y1962'.
To get exactly what you hoped to see, included the other columns in the group by, and apply sums to the Y variables in the frame:
df.groupby(['Code', 'Country', 'Item_Code', 'Item', 'Ele_Code', 'Unit']).agg({'Y1961': np.sum, 'Y1962': np.sum, 'Y1963': np.sum})
I thought I would contribute by providing a concrete example of the practical use of the scale function. Say you have 3 test scores (Math, Science, and English) that you want to compare. Maybe you may even want to generate a composite score based on each of the 3 tests for each observation. Your data could look as as thus:
student_id <- seq(1,10)
math <- c(502,600,412,358,495,512,410,625,573,522)
science <- c(95,99,80,82,75,85,80,95,89,86)
english <- c(25,22,18,15,20,28,15,30,27,18)
df <- data.frame(student_id,math,science,english)
Obviously it would not make sense to compare the means of these 3 scores as the scale of the scores are vastly different. By scaling them however, you have more comparable scoring units:
z <- scale(df[,2:4],center=TRUE,scale=TRUE)
You could then use these scaled results to create a composite score. For instance, average the values and assign a grade based on the percentiles of this average. Hope this helped!
Note: I borrowed this example from the book "R In Action". It's a great book! Would definitely recommend.
You can write your php file to the action
attr of form element.
At the php side you can get the form value by $_POST['element_name']
.
You also can lead your initial string, which you are going to check for pattern matching, to lower case. And use in your pattern lower case symbols respectively.
do you mean a method?
$('div.foo').attr('id', 'foo123');
Just be careful that you don't set multiple elements to the same ID.
^
in java does not mean to raise to a power. It means XOR.
You can use java's Math.pow()
And you might want to consider using double
instead of int
—that is:
double height;
double weight;
Note that 199/100
evaluates to 1.
import csv
from sys import argv
d = open("mydata.csv", "r")
db = []
for line in csv.reader(d):
db.append(line)
# the rest of your code with 'db' filled with your list of lists as rows and columbs of your csv file.
You can use the change
event to monitor what the user selects and notify them at that point that the file is not acceptable. It does not limit the actual list of files displayed, but it is the closest you can do client-side, besides the poorly supported accept
attribute.
var file = document.getElementById('someId');_x000D_
_x000D_
file.onchange = function(e) {_x000D_
var ext = this.value.match(/\.([^\.]+)$/)[1];_x000D_
switch (ext) {_x000D_
case 'jpg':_x000D_
case 'bmp':_x000D_
case 'png':_x000D_
case 'tif':_x000D_
alert('Allowed');_x000D_
break;_x000D_
default:_x000D_
alert('Not allowed');_x000D_
this.value = '';_x000D_
}_x000D_
};
_x000D_
<input type="file" id="someId" />
_x000D_
The error is because fName
is included in the SELECT
list, but is not included in a GROUP BY
clause and is not part of an aggregate function (Count()
, Min()
, Max()
, Sum()
, etc.)
You can fix that problem by including fName
in a GROUP BY
. But then you will face the same issue with surname
. So put both in the GROUP BY
:
SELECT
fName,
surname,
Count(*) AS num_rows
FROM
author
INNER JOIN book
ON author.aID = book.authorID;
GROUP BY
fName,
surname
Note I used Count(*)
where you wanted SUM(orders.quantity)
. However, orders
isn't included in the FROM
section of your query, so you must include it before you can Sum()
one of its fields.
If you have Access available, build the query in the query designer. It can help you understand what features are possible and apply the correct Access SQL syntax.
func getAppVersion() -> String {
let dictionary = Bundle.main.infoDictionary!
let versionValue = dictionary["CFBundleShortVersionString"] ?? "0"
let buildValue = dictionary["CFBundleVersion"] ?? "0"
return "\(versionValue) (build \(buildValue))"
}
Based on @rajat chauhan answer without forced cast to String
.
Floating-Point Types (Approximate Value) - FLOAT, DOUBLE
The FLOAT and DOUBLE types represent approximate numeric data values. MySQL uses four bytes for single-precision values and eight bytes for double-precision values.
For FLOAT, the SQL standard permits an optional specification of the precision (but not the range of the exponent) in bits following the keyword FLOAT in parentheses. MySQL also supports this optional precision specification, but the precision value is used only to determine storage size. A precision from 0 to 23 results in a 4-byte single-precision FLOAT column. A precision from 24 to 53 results in an 8-byte double-precision DOUBLE column.
MySQL permits a nonstandard syntax: FLOAT(M,D) or REAL(M,D) or DOUBLE PRECISION(M,D). Here, “(M,D)” means than values can be stored with up to M digits in total, of which D digits may be after the decimal point. For example, a column defined as FLOAT(7,4) will look like -999.9999 when displayed. MySQL performs rounding when storing values, so if you insert 999.00009 into a FLOAT(7,4) column, the approximate result is 999.0001.
Because floating-point values are approximate and not stored as exact values, attempts to treat them as exact in comparisons may lead to problems. They are also subject to platform or implementation dependencies.
For maximum portability, code requiring storage of approximate numeric data values should use FLOAT or DOUBLE PRECISION with no specification of precision or number of digits.
https://dev.mysql.com/doc/refman/5.5/en/floating-point-types.html
Problems with Floating-Point Values
Floating-point numbers sometimes cause confusion because they are approximate and not stored as exact values. A floating-point value as written in an SQL statement may not be the same as the value represented internally. Attempts to treat floating-point values as exact in comparisons may lead to problems. They are also subject to platform or implementation dependencies. The FLOAT and DOUBLE data types are subject to these issues. For DECIMAL columns, MySQL performs operations with a precision of 65 decimal digits, which should solve most common inaccuracy problems.
The following example uses DOUBLE to demonstrate how calculations that are done using floating-point operations are subject to floating-point error.
mysql> CREATE TABLE t1 (i INT, d1 DOUBLE, d2 DOUBLE);
mysql> INSERT INTO t1 VALUES (1, 101.40, 21.40), (1, -80.00, 0.00),
-> (2, 0.00, 0.00), (2, -13.20, 0.00), (2, 59.60, 46.40),
-> (2, 30.40, 30.40), (3, 37.00, 7.40), (3, -29.60, 0.00),
-> (4, 60.00, 15.40), (4, -10.60, 0.00), (4, -34.00, 0.00),
-> (5, 33.00, 0.00), (5, -25.80, 0.00), (5, 0.00, 7.20),
-> (6, 0.00, 0.00), (6, -51.40, 0.00);
mysql> SELECT i, SUM(d1) AS a, SUM(d2) AS b
-> FROM t1 GROUP BY i HAVING a <> b;
+------+-------+------+
| i | a | b |
+------+-------+------+
| 1 | 21.4 | 21.4 |
| 2 | 76.8 | 76.8 |
| 3 | 7.4 | 7.4 |
| 4 | 15.4 | 15.4 |
| 5 | 7.2 | 7.2 |
| 6 | -51.4 | 0 |
+------+-------+------+
The result is correct. Although the first five records look like they should not satisfy the comparison (the values of a and b do not appear to be different), they may do so because the difference between the numbers shows up around the tenth decimal or so, depending on factors such as computer architecture or the compiler version or optimization level. For example, different CPUs may evaluate floating-point numbers differently.
If columns d1 and d2 had been defined as DECIMAL rather than DOUBLE, the result of the SELECT query would have contained only one row—the last one shown above.
The correct way to do floating-point number comparison is to first decide on an acceptable tolerance for differences between the numbers and then do the comparison against the tolerance value. For example, if we agree that floating-point numbers should be regarded the same if they are same within a precision of one in ten thousand (0.0001), the comparison should be written to find differences larger than the tolerance value:
mysql> SELECT i, SUM(d1) AS a, SUM(d2) AS b FROM t1
-> GROUP BY i HAVING ABS(a - b) > 0.0001;
+------+-------+------+
| i | a | b |
+------+-------+------+
| 6 | -51.4 | 0 |
+------+-------+------+
1 row in set (0.00 sec)
Conversely, to get rows where the numbers are the same, the test should find differences within the tolerance value:
mysql> SELECT i, SUM(d1) AS a, SUM(d2) AS b FROM t1
-> GROUP BY i HAVING ABS(a - b) <= 0.0001;
+------+------+------+
| i | a | b |
+------+------+------+
| 1 | 21.4 | 21.4 |
| 2 | 76.8 | 76.8 |
| 3 | 7.4 | 7.4 |
| 4 | 15.4 | 15.4 |
| 5 | 7.2 | 7.2 |
+------+------+------+
5 rows in set (0.03 sec)
Floating-point values are subject to platform or implementation dependencies. Suppose that you execute the following statements:
CREATE TABLE t1(c1 FLOAT(53,0), c2 FLOAT(53,0));
INSERT INTO t1 VALUES('1e+52','-1e+52');
SELECT * FROM t1;
On some platforms, the SELECT statement returns inf and -inf. On others, it returns 0 and -0.
An implication of the preceding issues is that if you attempt to create a replication slave by dumping table contents with mysqldump on the master and reloading the dump file into the slave, tables containing floating-point columns might differ between the two hosts.
https://dev.mysql.com/doc/refman/5.5/en/problems-with-float.html
You have two options here.
Make a proper cron job that calls your script. Cron is a common name for a GNU/Linux daemon that periodically launches scripts according to a schedule you set. You add your script into a crontab or place a symlink to it into a special directory and the daemon handles the job of launching it in the background. You can read more at Wikipedia. There is a variety of different cron daemons, but your GNU/Linux system should have it already installed.
Use some kind of python approach (a library, for example) for your script to be able to daemonize itself. Yes, it will require a simple event loop (where your events are timer triggering, possibly, provided by sleep function).
I wouldn't recommend you to choose 2., because you would be, in fact, repeating cron functionality. The Linux system paradigm is to let multiple simple tools interact and solve your problems. Unless there are additional reasons why you should make a daemon (in addition to trigger periodically), choose the other approach.
Also, if you use daemonize with a loop and a crash happens, no one will check the mail after that (as pointed out by Ivan Nevostruev in comments to this answer). While if the script is added as a cron job, it will just trigger again.
<!--
//THIS PROGRAM WILL UPLOAD IMAGE AND WILL RETRIVE FROM DATABASE. UNSING BLOB
(IF YOU HAVE ANY QUERY CONTACT:[email protected])
CREATE TABLE `images` (
`id` int(100) NOT NULL AUTO_INCREMENT,
`name` varchar(100) NOT NULL,
`image` longblob NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB ;
-->
<!-- this form is user to store images-->
<form action="index.php" method="post" enctype="multipart/form-data">
Enter the Image Name:<input type="text" name="image_name" id="" /><br />
<input name="image" id="image" accept="image/JPEG" type="file"><br /><br />
<input type="submit" value="submit" name="submit" />
</form>
<br /><br />
<!-- this form is user to display all the images-->
<form action="index.php" method="post" enctype="multipart/form-data">
Retrive all the images:
<input type="submit" value="submit" name="retrive" />
</form>
<?php
//THIS IS INDEX.PHP PAGE
//connect to database.db name is images
mysql_connect("", "", "") OR DIE (mysql_error());
mysql_select_db ("") OR DIE ("Unable to select db".mysql_error());
//to retrive send the page to another page
if(isset($_POST['retrive']))
{
header("location:search.php");
}
//to upload
if(isset($_POST['submit']))
{
if(isset($_FILES['image'])) {
$name=$_POST['image_name'];
$email=$_POST['mail'];
$fp=addslashes(file_get_contents($_FILES['image']['tmp_name'])); //will store the image to fp
}
// our sql query
$sql = "INSERT INTO images VALUES('null', '{$name}','{$fp}');";
mysql_query($sql) or die("Error in Query insert: " . mysql_error());
}
?>
<?php
//SEARCH.PHP PAGE
//connect to database.db name = images
mysql_connect("localhost", "root", "") OR DIE (mysql_error());
mysql_select_db ("image") OR DIE ("Unable to select db".mysql_error());
//display all the image present in the database
$msg="";
$sql="select * from images";
if(mysql_query($sql))
{
$res=mysql_query($sql);
while($row=mysql_fetch_array($res))
{
$id=$row['id'];
$name=$row['name'];
$image=$row['image'];
$msg.= '<a href="search.php?id='.$id.'"><img src="data:image/jpeg;base64,'.base64_encode($row['image']). ' " /> </a>';
}
}
else
$msg.="Query failed";
?>
<div>
<?php
echo $msg;
?>
When you declare
var a=[];
you are declaring a empty array.
But when you are declaring
var a={};
you are declaring a Object .
Although Array is also Object in Javascript but it is numeric key paired values. Which have all the functionality of object but Added some few method of Array like Push,Splice,Length and so on.
So if you want Some values where you need to use numeric keys use Array. else use object. you can Create object like:
var a={name:"abc",age:"14"};
And can access values like
console.log(a.name);
Just use Analyze | Inspect Code
with appropriate inspection enabled (Unused declaration under Declaration redundancy group).
Using IntelliJ 11 CE you can now "Analyze | Run Inspection by Name ... | Unused declaration"
Actually they are the same. LEFT OUTER JOIN
is same as LEFT JOIN
and RIGHT OUTER JOIN
is same as RIGHT JOIN
. It is more informative way to compare from INNER Join
.
See this Wikipedia article for details.
It was single rowed once due to easy usage in a console context. But probably useful still.
var pressthiskey = "q"/* <-- q for example */;
var e = new Event("keydown");
e.key = pressthiskey;
e.keyCode = e.key.charCodeAt(0);
e.which = e.keyCode;
e.altKey = false;
e.ctrlKey = true;
e.shiftKey = false;
e.metaKey = false;
e.bubbles = true;
document.dispatchEvent(e);
_x000D_
app.put('url', function(req, res) {
// use our bear model to find the bear we want
Bear.findById(req.params.bear_id, function(err, bear) {
if (err)
res.send(err);
bear.name = req.body.name; // update the bears info
// save the bear
bear.save(function(err) {
if (err)
res.send(err);
res.json({ message: 'Bear updated!' });
});
});
});
Here is a better approach to solving the update method in mongoose, you can check Scotch.io for more details. This definitely worked for me!!!
You can also check the default buffer size by calling the read only DEFAULT_BUFFER_SIZE attribute from io module.
import io
print (io.DEFAULT_BUFFER_SIZE)
You may want to also look into using Task
instead of background workers.
The easiest way to do this is in your example is Task.Run(InitializationThread);
.
There are several benefits to using tasks instead of background workers. For example, the new async/await features in .net 4.5 use Task
for threading. Here is some documentation about Task
https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task
In my case, I was missing to set the header:
"Content-Type: application/json"
Use an SQLiteStatement.
e.g.
SQLiteStatement s = mDb.compileStatement( "select count(*) from users where uname='" + loginname + "' and pwd='" + loginpass + "'; " );
long count = s.simpleQueryForLong();
<head>
<script type="text/javascript">
function SetMaxLength () {
var input = document.getElementById ("myInput");
input.maxLength = 10;
}
</script>
</head>
<body>
<input id="myInput" type="text" size="20" />
</body>
Thanks,Bruno for giving me heads up on Common Name and Subject Alternative Name. As we figured out certificate was generated with CN with DNS name of network and asked for regeneration of new certificate with Subject Alternative Name entry i.e. san=ip:10.0.0.1. which is the actual solution.
But, we managed to find out a workaround with which we can able to run on development phase. Just add a static block in the class from which we are making ssl connection.
static {
HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier()
{
public boolean verify(String hostname, SSLSession session)
{
// ip address of the service URL(like.23.28.244.244)
if (hostname.equals("23.28.244.244"))
return true;
return false;
}
});
}
If you happen to be using Java 8, there is a much slicker way of achieving the same result:
static {
HttpsURLConnection.setDefaultHostnameVerifier((hostname, session) -> hostname.equals("127.0.0.1"));
}
it is because of letters or digit infront of [mysqld] just check the leeters or digit anything is not required before [mysqld]
it may be something like
0[mysqld] then this error will occur
To get the namespace in its namespace format, e.g. {myNameSpace}
, you can do the following:
root = tree.getroot()
ns = re.match(r'{.*}', root.tag).group(0)
This way, you can use it later on in your code to find nodes, e.g using string interpolation (Python 3).
link = root.find(f"{ns}link")
I had this, but, it was because I had added a NuGet package that had updated the binding redirects. Once I removed the package, the redirects were still there. I removed all of them, and then ran update-package -reinstall. This added the correct redirects.
simply use delete
, but be aware that you should read fully what the effects are of using this:
delete object.index; //true
object.index; //undefined
but if I was to use like so:
var x = 1; //1
delete x; //false
x; //1
but if you do wish to delete variables in the global namespace, you can use it's global object such as window
, or using this
in the outermost scope i.e
var a = 'b';
delete a; //false
delete window.a; //true
delete this.a; //true
http://perfectionkills.com/understanding-delete/
another fact is that using delete on an array will not remove the index but only set the value to undefined, meaning in certain control structures such as for loops, you will still iterate over that entity, when it comes to array's you should use splice
which is a prototype of the array object.
Example Array:
var myCars=new Array();
myCars[0]="Saab";
myCars[1]="Volvo";
myCars[2]="BMW";
if I was to do:
delete myCars[1];
the resulting array would be:
["Saab", undefined, "BMW"]
but using splice like so:
myCars.splice(1,1);
would result in:
["Saab", "BMW"]
It has to be a constant - the value has to be computable at the time that the procedure is created, and that one computation has to provide the value that will always be used.
Look at the definition of sys.all_parameters
:
default_value
sql_variant
Ifhas_default_value
is 1, the value of this column is the value of the default for the parameter; otherwise,NULL
.
That is, whatever the default for a parameter is, it has to fit in that column.
As Alex K pointed out in the comments, you can just do:
CREATE PROCEDURE [dbo].[problemParam]
@StartDate INT = NULL,
@EndDate INT = NULL
AS
BEGIN
SET @StartDate = COALESCE(@StartDate,CONVERT(INT,(CONVERT(CHAR(8),GETDATE()-130,112))))
provided that NULL
isn't intended to be a valid value for @StartDate
.
As to the blog post you linked to in the comments - that's talking about a very specific context - that, the result of evaluating GETDATE()
within the context of a single query is often considered to be constant. I don't know of many people (unlike the blog author) who would consider a separate expression inside a UDF to be part of the same query as the query that calls the UDF.
i get the solution. i've using cygwin and this is the problem the rsync command for Windows work only in windows shell and works in the windows powershell.
A few times it has happened the same error between two linux boxes. and appears to be by incompatible versions of rsync
I resolved it by giving permission to the user on each of the directories that you're using, like so:
sudo chown user /home/user/git
and so on.
This worked for me, I was able to pull and push into my remote repo.
Reference array:
var array = [
{ ID: '100', },
{ ID: '200', },
{ ID: '300', },
{ ID: '400', },
{ ID: '500', }
];
Using filter
and indexOf
:
var in_array = array.filter(function(item) {
return item.ID == '200' // look for the item where ID is equal to value
});
var index = array.indexOf(in_array[0]);
Looping through each item in the array using indexOf
:
for (var i = 0; i < array.length; i++) {
var item= array[i];
if (item.ID == '200') {
var index = array.indexOf(item);
}
}
I got same error before,
type this query in your database CREATE SEQUENCE hibernate_sequence START WITH 1 INCREMENT BY 1 NOCYCLE;
that's work for me, good luck ~
Try below code:
String empty = "-";
if (row.getCell(3) == null || row.getCell(3).getCellType() == Cell.CELL_TYPE_BLANK) {
upld.setValue(empty);
} else {
upld.setValue(row.getCell(3).getStringCellValue());
}
Getting this error, I changed the
c/C++ > Code Generation > Runtime Library to Multi-threaded library (DLL) /MD
for both code project and associated Google Test project. This solved the issue.
Note: all components of the project must have the same definition in c/C++ > Code Generation > Runtime Library. Either DLL or not DLL, but identical.
In the new lodash release v4.0.0 _.pluck
has removed in favor of _.map
Then you can use this:
_.map(users, 'id'); // [12, 14, 16, 18]
You can see in Github Changelog
This uses counting to create numeric unique ID. In my use, I will not be decrementing ever, even when the document
that the ID is needed for is deleted.
Upon a collection
creation that needs unique numeric value
appData
with one document, set
with .doc
id only
uniqueNumericIDAmount
to 0 in the firebase firestore console
doc.data().uniqueNumericIDAmount + 1
as the unique numeric idappData
collection uniqueNumericIDAmount
with firebase.firestore.FieldValue.increment(1)
firebase
.firestore()
.collection("appData")
.doc("only")
.get()
.then(doc => {
var foo = doc.data();
foo.id = doc.id;
// your collection that needs a unique ID
firebase
.firestore()
.collection("uniqueNumericIDs")
.doc(user.uid)// user id in my case
.set({// I use this in login, so this document doesn't
// exist yet, otherwise use update instead of set
phone: this.state.phone,// whatever else you need
uniqueNumericID: foo.uniqueNumericIDAmount + 1
})
.then(() => {
// upon success of new ID, increment uniqueNumericIDAmount
firebase
.firestore()
.collection("appData")
.doc("only")
.update({
uniqueNumericIDAmount: firebase.firestore.FieldValue.increment(
1
)
})
.catch(err => {
console.log(err);
});
})
.catch(err => {
console.log(err);
});
});
Basically, when your FROM clause lists tables like so:
SELECT * FROM
tableA, tableB, tableC
the result is a cross product of all the rows in tables A, B, C. Then you apply the restriction WHERE tableA.id = tableB.a_id
which will throw away a huge number of rows, then further ... AND tableB.id = tableC.b_id
and you should then get only those rows you are really interested in.
DBMSs know how to optimise this SQL so that the performance difference to writing this using JOINs is negligible (if any). Using the JOIN notation makes the SQL statement more readable (IMHO, not using joins turns the statement into a mess). Using the cross product, you need to provide join criteria in the WHERE clause, and that's the problem with the notation. You are crowding your WHERE clause with stuff like
tableA.id = tableB.a_id
AND tableB.id = tableC.b_id
which is only used to restrict the cross product. WHERE clause should only contain RESTRICTIONS to the resultset. If you mix table join criteria with resultset restrictions, you (and others) will find your query harder to read. You should definitely use JOINs and keep the FROM clause a FROM clause, and the WHERE clause a WHERE clause.
#include <algorithm> // std::search
#include <string>
using std::search; using std::count; using std::string;
int main() {
string mystring = "The needle in the haystack";
string str = "needle";
string::const_iterator it;
it = search(mystring.begin(), mystring.end(),
str.begin(), str.end()) != mystring.end();
// if string is found... returns iterator to str's first element in mystring
// if string is not found... returns iterator to mystring.end()
if (it != mystring.end())
// string is found
else
// not found
return 0;
}
I had a problem with a CSV that contains fields with a quote character in them, so using the TextFieldParser, I came up with the following:
private static string[] parseCSVLine(string csvLine)
{
using (TextFieldParser TFP = new TextFieldParser(new MemoryStream(Encoding.UTF8.GetBytes(csvLine))))
{
TFP.HasFieldsEnclosedInQuotes = true;
TFP.SetDelimiters(",");
try
{
return TFP.ReadFields();
}
catch (MalformedLineException)
{
StringBuilder m_sbLine = new StringBuilder();
for (int i = 0; i < TFP.ErrorLine.Length; i++)
{
if (i > 0 && TFP.ErrorLine[i]== '"' &&(TFP.ErrorLine[i + 1] != ',' && TFP.ErrorLine[i - 1] != ','))
m_sbLine.Append("\"\"");
else
m_sbLine.Append(TFP.ErrorLine[i]);
}
return parseCSVLine(m_sbLine.ToString());
}
}
}
A StreamReader is still used to read the CSV line by line, as follows:
using(StreamReader SR = new StreamReader(FileName))
{
while (SR.Peek() >-1)
myStringArray = parseCSVLine(SR.ReadLine());
}
For this html:
<div class="outer">
<div class="inner"></div>
</div>
This selector should work:
$('.outer > .inner')
You can use
.floatybox {
display: inline-block;
width: 123px;
}
If you only need to support browsers that have support for inline blocks. Inline blocks can have width, but are inline, like button elements.
Oh, and you might wnat to add vertical-align: top on the elements to make sure things line up
SELECT [T1].*
FROM [Table1] AS [T1]
WHERE NOT EXISTS (SELECT
1 AS [C1]
FROM [Table2] AS [T2]
WHERE ([T2].[MAKE] = [T1].[MAKE]) AND
([T2].[MODEL] = [T1].[MODEL]) AND
([T2].[Serial Number] = [T1].[Serial Number])
);
It seems to me that you should return the value that is semantically correct in context, whatever that may be. A rule that says "always return an empty collection" seems a little simplistic to me.
Suppose in, say, a system for a hospital, we have a function that is supposed to return a list of all previous hospitalizations for the past 5 years. If the customer has not been in the hospital, it makes good sense to return an empty list. But what if the customer left that part of the admittance form blank? We need a different value to distinguish "empty list" from "no answer" or "don't know". We could throw an exception, but it's not necessarily an error condition, and it doesn't necessarily drive us out of the normal program flow.
I've often been frustrated by systems that cannot distinguish between zero and no answer. I've had a number of times where a system has asked me to enter some number, I enter zero, and I get an error message telling me that I must enter a value in this field. I just did: I entered zero! But it won't accept zero because it can't distinguish it from no answer.
Reply to Saunders:
Yes, I'm assuming that there's a difference between "Person didn't answer the question" and "The answer was zero." That was the point of the last paragraph of my answer. Many programs are unable to distinguish "don't know" from blank or zero, which seems to me a potentially serious flaw. For example, I was shopping for a house a year or so ago. I went to a real estate web site and there were many houses listed with an asking price of $0. Sounded pretty good to me: They're giving these houses away for free! But I'm sure the sad reality was that they just hadn't entered the price. In that case you may say, "Well, OBVIOUSLY zero means they didn't enter the price -- nobody's going to give a house away for free." But the site also listed the average asking and selling prices of houses in various towns. I can't help but wonder if the average didn't include the zeros, thus giving an incorrectly low average for some places. i.e. what is the average of $100,000; $120,000; and "don't know"? Technically the answer is "don't know". What we probably really want to see is $110,000. But what we'll probably get is $73,333, which would be completely wrong. Also, what if we had this problem on a site where users can order on-line? (Unlikely for real estate, but I'm sure you've seen it done for many other products.) Would we really want "price not specified yet" to be interpreted as "free"?
RE having two separate functions, an "is there any?" and an "if so, what is it?" Yes, you certainly could do that, but why would you want to? Now the calling program has to make two calls instead of one. What happens if a programmer fails to call the "any?" and goes straight to the "what is it?" ? Will the program return a mis-leading zero? Throw an exception? Return an undefined value? It creates more code, more work, and more potential errors.
The only benefit I see is that it enables you to comply with an arbitrary rule. Is there any advantage to this rule that makes it worth the trouble of obeying it? If not, why bother?
Reply to Jammycakes:
Consider what the actual code would look like. I know the question said C# but excuse me if I write Java. My C# isn't very sharp and the principle is the same.
With a null return:
HospList list=patient.getHospitalizationList(patientId);
if (list==null)
{
// ... handle missing list ...
}
else
{
for (HospEntry entry : list)
// ... do whatever ...
}
With a separate function:
if (patient.hasHospitalizationList(patientId))
{
// ... handle missing list ...
}
else
{
HospList=patient.getHospitalizationList(patientId))
for (HospEntry entry : list)
// ... do whatever ...
}
It's actually a line or two less code with the null return, so it's not more burden on the caller, it's less.
I don't see how it creates a DRY issue. It's not like we have to execute the call twice. If we always wanted to do the same thing when the list does not exist, maybe we could push handling down to the get-list function rather than having the caller do it, and so putting the code in the caller would be a DRY violation. But we almost surely don't want to always do the same thing. In functions where we must have the list to process, a missing list is an error that might well halt processing. But on an edit screen, we surely don't want to halt processing if they haven't entered data yet: we want to let them enter data. So handling "no list" must be done at the caller level one way or another. And whether we do that with a null return or a separate function makes no difference to the bigger principle.
Sure, if the caller doesn't check for null, the program could fail with a null-pointer exception. But if there's a separate "got any" function and the caller doesn't call that function but blindly calls the "get list" function, then what happens? If it throws an exception or otherwise fails, well, that's pretty much the same as what would happen if it returned null and didn't check for it. If it returns an empty list, that's just wrong. You're failing to distinguish between "I have a list with zero elements" and "I don't have a list". It's like returning zero for the price when the user didn't enter any price: it's just wrong.
I don't see how attaching an additional attribute to the collection helps. The caller still has to check it. How is that better than checking for null? Again, the absolute worst thing that could happen is for the programmer to forget to check it, and give incorrect results.
A function that returns null is not a surprise if the programmer is familiar with the concept of null meaning "don't have a value", which I think any competent programmer should have heard of, whether he thinks it's a good idea or not. I think having a separate function is more of a "surprise" problem. If a programmer is unfamiliar with the API, when he runs a test with no data he'll quickly discover that sometimes he gets back a null. But how would he discover the existence of another function unless it occurred to him that there might be such a function and he checks the documentation, and the documentation is complete and comprehensible? I would much rather have one function that always gives me a meaningful response, rather than two functions that I have to know and remember to call both.
After struggling for many days finally found a solution that works perfectly.
Mac OS open ~/Library folder (in your home directory) and delete the VirtulBox folder. This will remove all configurations and you can start the virtual box again!
Others look for .virtualbox folder in your home directory. Remove it and open VirtualBox should solve your issue.
Cheers!!
I ended up doing a mess shell pipeline to get what I wanted. I just merged branches from the origin remote:
git branch -r --all --merged \
| tail -n +2 \
| grep -P '^ remotes/origin/(?!HEAD)' \
| perl -p -e 's/^ remotes\/origin\///g;s/master\n//g'
Hibernate tries to insert data that violate underlying database integrity contraints.
There's probably misconfiguration in hibernate persistent classes and/or mapping configuration (*.hbm.xml or annotations in persitent classes).
Maybe a property of the bean you want to save is not type-compatible with its related field in database (could explain the constraint [numbering]
part).
This is the example code taken from the PHP documentation here: https://www.php.net/manual/en/function.filemtime.php
// outputs e.g. somefile.txt was last changed: December 29 2002 22:16:23.
$filename = 'somefile.txt';
if (file_exists($filename)) {
echo "$filename was last modified: " . date ("F d Y H:i:s.", filemtime($filename));
}
The code specifies the filename, then checks if it exists and then displays the modification time using filemtime()
.
filemtime()
takes 1 parameter which is the path to the file, this can be relative or absolute.
If you want to get a custom window title color on Windows 10, in short going from this
to this (or any other custom color for the window of your Eclipse IDE)
follow the next steps.
Go to C:\Windows\Resources\Themes\
. Duplicate the folder aero
and the file aero.theme
. If you can't duplicate the folder and the file then right click on both, Properties, Security, Modify, add your user to Permissions, and set authorizations to modify, read and write.
Rename the folder C:\Windows\Resources\Themes\aero - copy
and the file C:\Windows\Resources\Themes\aero - copy.theme
to C:\Windows\Resources\Themes\custom
and C:\Windows\Resources\Themes\custom.theme
(you can pick the name you want).
Rename C:\Windows\Resources\Themes\custom\aero.msstyles
to C:\Windows\Resources\Themes\custom.msstyles
.
Rename C:\Windows\Resources\Themes\custom\%your_locale%\aero.msstyles.mui
(%your_locale% is fr-FR in my case) to C:\Windows\Resources\Themes\custom\%your_locale%\custom.msstyles.mui
.
Edit custom.theme
with Notepad and change the PATH
variable of VisualStyles
to your custom.msstyles
.
Set your custom theme (yet unchanged) by double-clicking on custom.theme
. Then right-click on start menu button, go to Parameters -> Customize appearance -> Themes and select the second one. Go to the menu Colors
, select dark mode for every applications. Choose custom color for accent color and put it full black.
Apply your favorite dark theme (here DevStyle - Darkest dark - Deep black) to Eclipse and voilà, you have a full dark theme for Eclipse on Windows 10!
There are several sources online that have geojson data for timezones (here's one, here's another)
Use a geometry library to create polygon objects from the geojson coordinates (shapely [python], GEOS [c++], JTS [java], NTS [.net]).
Convert your lat/lng to a point object (however your library represents that) and check if it intersects the timezone polygon.
from shapely.geometry import Polygon, Point
def get_tz_from_lat_lng(lat, lng):
for tz, geojson in timezones.iteritems():
coordinates = geojson['features'][0]['geometry']['coordinates']
polygon = Polygon(coordinates)
point = Point(lng, lat)
if polygon.contains(point):
return tz
There is a more efficient way of doing this in Windows 7. SETX is installed by default and supports connecting to other systems.
To modify a remote system's global environment variables, you would use
setx /m /s HOSTNAME-GOES-HERE VariableNameGoesHere VariableValueGoesHere
This does not require restarting Windows Explorer.
I know this is a bit old but the answer in short would be <load-on-startup> both occurrences have given the same id which is 1 twice. This may confuse loading sequence.
To do this and avoid the E_STRICT and not mess with the array's internal pointer you can use:
function lelement($array) {return end($array);}
$last_element = lelement($array);
lelement only works with a copy so it doesn't affect the array's pointer.
$( "#dialogueForm" ).dialog({
autoOpen: false,
height: "auto",
width: "auto",
modal: true,
my: "center",
at: "center",
of: window,
close : function(){
// functionality goes here
}
});
"close" property of dialog gives the close event for the same.
Lodash has an utility function for this as well: https://lodash.com/docs#difference
I won't attempt to refute anything said heretofore, but i will offer this use of eval() that (as far as I know) can't be done any other way. There's probably other ways to code this, and probably ways to optimize it, but this is done longhand and without any bells and whistles for clarity sake to illustrate a use of eval that really doesn't have any other alternatives. That is: dynamical (or more accurately) programmically-created object names (as opposed to values).
//Place this in a common/global JS lib:
var NS = function(namespace){
var namespaceParts = String(namespace).split(".");
var namespaceToTest = "";
for(var i = 0; i < namespaceParts.length; i++){
if(i === 0){
namespaceToTest = namespaceParts[i];
}
else{
namespaceToTest = namespaceToTest + "." + namespaceParts[i];
}
if(eval('typeof ' + namespaceToTest) === "undefined"){
eval(namespaceToTest + ' = {}');
}
}
return eval(namespace);
}
//Then, use this in your class definition libs:
NS('Root.Namespace').Class = function(settings){
//Class constructor code here
}
//some generic method:
Root.Namespace.Class.prototype.Method = function(args){
//Code goes here
//this.MyOtherMethod("foo")); // => "foo"
return true;
}
//Then, in your applications, use this to instantiate an instance of your class:
var anInstanceOfClass = new Root.Namespace.Class(settings);
EDIT: by the way, I wouldn't suggest (for all the security reasons pointed out heretofore) that you base you object names on user input. I can't imagine any good reason you'd want to do that though. Still, thought I'd point it out that it wouldn't be a good idea :)
There are several libraries available solving this problem, but the simplest is probably to use Boost Tokenizer:
#include <iostream>
#include <string>
#include <boost/tokenizer.hpp>
#include <boost/foreach.hpp>
typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
std::string str("denmark;sweden;india;us");
boost::char_separator<char> sep(";");
tokenizer tokens(str, sep);
BOOST_FOREACH(std::string const& token, tokens)
{
std::cout << "<" << *tok_iter << "> " << "\n";
}
I had to do something similar for my users, with a small variant that they want to have a running number grouping the similar items. Thought I'd share it here.
1
in A2=IF(B3=B2,A2,A2+1)
=MOD($A1, 2)=1
as the formulaYour original problem is that pip cannot write the logs to the folder.
IOError: [Errno 13] Permission denied: '/Users/markwalker/Library/Logs/pip.log'
You need to cd into a folder in which the process invoked can write like /tmp
so a cd /tmp
and re invoking the command will probably work but is not what you want.
BUT actually for this particular case (you not wanting to use sudo
for installing python packages) and no need for global package installs you can use the --user
flag like this :
pip install --user <packagename>
and it will work just fine.
I assume you have a one user python python installation and do not want to bother with reading about virtualenv (which is not very userfriendly) or pipenv.
As some people in the comments section have pointed out the next approach is not a very good idea unless you do not know what to do and got stuck:
Another approach for global packages like in your case you want to do something like :
chown -R $USER /Library/Python/2.7/site-packages/
or more generally
chown -R $USER <path to your global pip packages>
Do you use the ob_start(ob_gzhandler)
function? If so and If you output any content above the ob_start(ob_gzhandler)
function, you'll get this error. You can don't use this function or don't output content above this function. The ob_gzhandler
callback function will determine what type of content encoding the browser will accept and will return its output accordingly. So if you output content above this function, the content's encoding maybe different from the output content of ob_gzhandler
and that cause this error.
Just go to web.config file and add following
<system.webServer>
<defaultDocument>
<files>
<clear />
<add value="Path of your Page" />
</files>
</defaultDocument>
</system.webServer>
The equivalent is:
python3 -m http.server
You can do this with php if the button opens a new page.
For example if the button link to a page named pagename.php as, url: www.website.com/pagename.php the button will stay red as long as you stay on that page.
I exploded the url by '/' an got something like:
url[0] = pagename.php
<? $url = explode('/', substr($_SERVER['REQUEST_URI'], strpos('/',$_SERVER['REQUEST_URI'] )+1,strlen($_SERVER['REQUEST_URI']))); ?>
<html>
<head>
<style>
.btn{
background:white;
}
.btn:hover,
.btn-on{
background:red;
}
</style>
</head>
<body>
<a href="/pagename.php" class="btn <? if (url[0]='pagename.php') {echo 'btn-on';} ?>">Click Me</a>
</body>
</html>
note: I didn't try this code. It might need adjustments.
To expand on the top-voted answer, for reference, if the you want to add more complex items to the array:
@:myArray.push(ClassMember1: "@d.ClassMember1", ClassMember2: "@d.ClassMember2");
etc.
Furthermore, if you want to pass the array as a parameter to your controller, you can stringify it first:
myArray = JSON.stringify({ 'myArray': myArray });
As comments above state a != a will not work in g++ and some other compilers, but this trick should. It may not be as efficient, but it's still a way:
bool IsNan(float a)
{
char s[4];
sprintf(s, "%.3f", a);
if (s[0]=='n') return true;
else return false;
}
Basically, in g++ (I am not sure about others though) printf prints 'nan' on %d or %.f formats if variable is not a valid integer/float. Therefore this code is checking for the first character of string to be 'n' (as in "nan")
Try add a extend pseudo function:
$.expr[':'].textEquals = $.expr.createPseudo(function(arg) {
return function( elem ) {
return $(elem).text().match("^" + arg + "$");
};
});
Then you can do:
$('p:textEquals("Hello World")');
You can use {}
arround your variable, to separate it from what's after:
echo "{$test}y"
As reference, you can take a look to the Variable parsing - Complex (curly) syntax section of the PHP manual.
UPDATE: I now have a complete turnkey, all-in-one answer, see https://stackoverflow.com/a/49019950/300224. Only took 3 years to figure out!
According to the Travis documentation: https://github.com/travis-ci/travis-ci there is a concoction of projects that collude to deliver the Travis CI web service we know and love. The following subset of projects appears to allow local make test
functionality using the .travis.yml
in your project:
travis-build creates the build
script for each job. It takes the configuration from the .travis.yml
file and
creates a bash
script that is then run in the build environment by
travis-worker.
travis-cookbooks holds the Chef cookbooks that are used to provision the build environments.
travis-worker is responsible for running the build scripts in a clean environment. It streams the log output to travis-logs and pushes state updates (build starting/finishing) to travis-hub.
(The other subprojects are responsible for communicating with GitHub, their web interface, email, and their API.)
It’s very simple, it just advertises a string which contains a few characters conforming to Apple’s iBeacon standard. you can refer the Link http://glimwormbeacons.com/learn/what-makes-an-ibeacon-an-ibeacon/
Note: Calling a lifecycle method from another one is not a good practice. In below example I tried to achieve that your onNewIntent will be always called irrespective of your Activity type.
OnNewIntent() always get called for singleTop/Task activities except for the first time when activity is created. At that time onCreate is called providing to solution for few queries asked on this thread.
You can invoke onNewIntent always by putting it into onCreate method like
@Override
public void onCreate(Bundle savedState){
super.onCreate(savedState);
onNewIntent(getIntent());
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
//code
}
There may be some file access permission/restriction problems. First check to access the below directory manually, check whether your TARGET_VERSION exists, Then check the android sdk manager.
Okay, this topic is somewhat outdated, but as I found it on google and have a solution this might be interesting for someone:
Basically (of course) this is not possible on every http proxy but works on proxies allowing http connect on port 3690. This method is used by http proxies on port 443 to provide a way for secure https connections. If your administrator configures the proxy to open port 3690 for http connect you can setup your local machine to establish a tunnel through the proxy.
I just was in the need to check out some files from svn.openwrt.org within our companies network. An easy solution to create a tunnel is adding the following line to your /etc/hosts
127.0.0.1 svn.openwrt.org
Afterwards, you can use socat to create a tcp tunnel to a local port:
while true; do socat tcp-listen:3690 proxy:proxy.at.your.company:svn.openwrt.org:3690; done
You should execute the command as root. It opens the local port 3690 and on connection creates a tunnel to svn.openwrt.org on the same port.
Just replace the port and server addresses on your own needs.
Terminal > su
> password
> vim /etc/vimrc
Click here and edit as in line number (13):
set nu
Use the > command. To indent five lines, 5>>. To mark a block of lines and indent it, Vjj> to indent three lines (Vim only). To indent a curly-braces block, put your cursor on one of the curly braces and use >% or from anywhere inside block use >iB.
If you’re copying blocks of text around and need to align the indent of a block in its new location, use ]p instead of just p. This aligns the pasted block with the surrounding text.
Also, the shiftwidth
setting allows you to control how many spaces to indent.
There are workarounds but no clean/short/sweet way to do it with streams and to be honest, you would probably be better off with:
int idx = 0;
for (Param p : params) query.bind(idx++, p);
Or the older style:
for (int idx = 0; idx < params.size(); idx++) query.bind(idx, params.get(idx));
In Swift 3.0
Type 1: Convert NSString to String
let stringNumb:NSString = "1357"
let someNumb = Int(stringNumb as String) // 1357 as integer
Type 2: If the String has Integer only
let stringNumb = "1357"
let someNumb = Int(stringNumb) // 1357 as integer
Type 3: If the String has Float value
let stringNumb = "13.57"
if let stringToFloat = Float(stringNumb){
let someNumb = Int(stringToFloat)// 13 as Integer
}else{
//do something if the stringNumb not have digit only. (i.e.,) let stringNumb = "13er4"
}
You have to put a space between {}
and \;
So the command will be like:
find /home/me/download/ -type f -name "*.rm" -exec ffmpeg -i {} -sameq {}.mp3 && rm {} \;
Anatoliy's answer in PHP:
public static function detectCardType($num)
{
$re = array(
"visa" => "/^4[0-9]{12}(?:[0-9]{3})?$/",
"mastercard" => "/^5[1-5][0-9]{14}$/",
"amex" => "/^3[47][0-9]{13}$/",
"discover" => "/^6(?:011|5[0-9]{2})[0-9]{12}$/",
);
if (preg_match($re['visa'],$num))
{
return 'visa';
}
else if (preg_match($re['mastercard'],$num))
{
return 'mastercard';
}
else if (preg_match($re['amex'],$num))
{
return 'amex';
}
else if (preg_match($re['discover'],$num))
{
return 'discover';
}
else
{
return false;
}
}
You can do
[n.name for n in tf.get_default_graph().as_graph_def().node]
Also, if you are prototyping in an IPython notebook, you can show the graph directly in notebook, see show_graph
function in Alexander's Deep Dream notebook
$("#DDLID").val( $("#DDLID option:first-child").val() );
First open the Package Manager Console. Then select your project from the dropdown list. And run the following commands for uninstalling nuget packages.
Get-Package
for getting all the package you have installed.
and then
Uninstall-Package PagedList.Mvc
--- to uninstall a package named PagedList.MVC
Message
PM> Uninstall-Package PagedList.Mvc
Successfully removed 'PagedList.Mvc 4.5.0.0' from MCEMRBPP.PIR.
break;
leaves your loop.
continue;
skips any code for the remainder of that loop and goes on to the next loop, so long as the condition is still true.
you declare like this
private boolean isSelectionRight;
write
out.writeInt(isSelectionRight ? 1 : 0);
read
isSelectionRight = in.readInt() != 0;
boolean type needs to be converted to something that Parcel supports and so we can convert it to int.
Put the frame in a VisualBrush:
VisualBrush brush = new VisualBrush { TileMode = TileMode.None };
brush.Visual = frame;
brush.AlignmentX = AlignmentX.Center;
brush.AlignmentY = AlignmentY.Center;
brush.Stretch = Stretch.Uniform;
Put the VisualBrush in GeometryDrawing
GeometryDrawing drawing = new GeometryDrawing();
drawing.Brush = brush;
// Brush this in 1, 1 ratio
RectangleGeometry rect = new RectangleGeometry { Rect = new Rect(0, 0, 1, 1) };
drawing.Geometry = rect;
Now put the GeometryDrawing in a DrawingImage:
new DrawingImage(drawing);
Place this on your source of the image, and voilà!
You could do it a lot easier though:
<Image>
<Image.Source>
<BitmapImage UriSource="/yourassembly;component/YourImage.PNG"></BitmapImage>
</Image.Source>
</Image>
And in code:
BitmapImage image = new BitmapImage { UriSource="/yourassembly;component/YourImage.PNG" };
A jar
is merely a container. It is a file archive a la tar
. While a jar
may have interesting information contained within it's META-INF hierarchy, it has no obligation to specify the vintage of the classes within it's contents. For that, one must examine the class
files therein.
As as Peter Lawrey mentioned in comment to the original question, you can't necessarily know which JDK release built a given class
file, but you can find out the byte code class version of the class
file contained in a jar
.
Yes, this kinda sucks, but the first step is to extract one or more classes from the jar
. For example:
$ jar xf log4j-1.2.15.jar
On Linux, Mac OS X or Windows with Cygwin installed, the file(1) command knows the class version.
$ file ./org/apache/log4j/Appender.class
./org/apache/log4j/Appender.class: compiled Java class data, version 45.3
Or alternatively, using javap
from the JDK as @jikes.thunderbolt aptly points out:
$ javap -v ./org/apache/log4j/Appender.class | grep major
major version: 45
For Windows
environments without either file
or grep
> javap -v ./org/apache/log4j/Appender.class | findstr major
major version: 45
FWIW, I will concur that javap
will tell a whole lot more about a given class
file than the original question asked.
Anyway, a different class version, for example:
$ file ~/bin/classes/P.class
/home/dave/bin/classes/P.class: compiled Java class data, version 50.0
The class version major number corresponds to the following Java JDK versions:
Cardinality of a set is the namber of the elements in set for we have a set a > a,b,c < so ths set contain 3 elements 3 is the cardinality of that set
I had a different cause for this error. I tried to insert a date without using quotes and received a strange error telling me I had tried to insert a date from 2003.
Although I was already using the YYYY-MM-DD format, I forgot to add quotes around the date. Even though it is a date and not a string, quotes are still required.
Here is a forum thread that provides a C# image resizing code sample. You could use one of the GD library binders to do resampling in C#.
You need the stat call, and the file name:
my $last_mod_time = (stat ($file))[9];
Perl also has a different version:
my $last_mod_time = -M $file;
but that value is relative to when the program started. This is useful for things like sorting, but you probably want the first version.
Try this:
<tr ng-repeat="player in players | filter:{id: player_id, name:player_name} | filter:ageFilter">
$scope.ageFilter = function (player) {
return (player.age > $scope.min_age && player.age < $scope.max_age);
}
<script type="text/javascript">
$(window).on('load',function(){
setTimeout(function(){ alert(" //show popup"); }, 5000);
});
</script>
Both accepted answer and Logical Processing Order explain why you could not do what you proposed.
Possible solution:
WHERE
From SQL Server 2008
you could use APPLY
operator combined with Table valued Constructor
:
SELECT *, s.distance
FROM poi_table
CROSS APPLY (VALUES(6371*1000*acos(cos(radians(42.3936868308))*cos(radians(lat))*cos(radians(lon)-radians(-72.5277256966))+sin(radians(42.3936868308))*sin(radians(lat))))) AS s(distance)
WHERE distance < 500;
Simple INNER JOIN VIEW code....
CREATE VIEW room_view
AS SELECT a.*,b.*
FROM j4_booking a INNER JOIN j4_scheduling b
on a.room_id = b.room_id;
The Self-Host now uses Owin. Checkout http://www.asp.net/signalr/overview/signalr-20/getting-started-with-signalr-20/tutorial-signalr-20-self-host to setup the server. It's compatible with the client code above.
Simple solution which properly handles ByteOrder:
ByteBuffer.allocate(4).order(ByteOrder.nativeOrder()).putInt(yourInt).array();
Your problem is that log4j has not been initialized. It does not affect the outcome of you application in any way, so it's safe to ignore or just initialize Log4J, see: How to initialize log4j properly?
This should work :
str = str.replace(/[^a-z0-9-]/g, '');
Everything between the indicates what your are looking for
/
is here to delimit your pattern so you have one to start and one to end[]
indicates the pattern your are looking for on one specific character^
indicates that you want every character NOT corresponding to what followsa-z
matches any character between 'a' and 'z' included0-9
matches any digit between '0' and '9' included (meaning any digit)-
the '-' characterg
at the end is a special parameter saying that you do not want you regex to stop on the first character matching your pattern but to continue on the whole stringThen your expression is delimited by /
before and after.
So here you say "every character not being a letter, a digit or a '-' will be removed from the string".
The 'find' method can be used to get all child inputs of a container that has already been cached to save looking it up again (whereas the 'children' method will only get the immediate children). e.g.
var panel= $("#panel");
var inputs = panel.find("input");
The git checkout master
of the answer by Woland isn't needed. Instead use the "Checkout to specific local branch" in the "Additional Behaviors" section to set the "Branch name" to master.
The git commit -am "blah"
is still needed.
Now you can use the "Git Publisher" under "Post-build Actions" to push the changes. Be sure to specify the "Branches" to push ("Branch to push" = master, "Target remote name" = origin).
"Merge Results" isn't needed.
I tweaked this answer a bit and came up with this fiddle.
Filter defined as:
var myApp = angular.module('myApp', []);
myApp.filter('range', function() {
return function(input, total) {
total = parseInt(total);
for (var i=0; i<total; i++) {
input.push(i);
}
return input;
};
});
With the repeat used like this:
<div ng-repeat="n in [] | range:100">
do something
</div>
Reason for the error:
Column
tries to expands in vertical axis, and so does the ListView
, hence you need to constrain the height of ListView
.
Solutions
Use either Expanded
or Flexible
if you want to allow ListView
to take up entire left space in Column
.
Column(
children: <Widget>[
Expanded(
child: ListView(...),
)
],
)
Use SizedBox
if you want to restrict the size of ListView
to a certain height.
Column(
children: <Widget>[
SizedBox(
height: 200, // constrain height
child: ListView(),
)
],
)
Use shrinkWrap
, if your ListView
isn't too big.
Column(
children: <Widget>[
ListView(
shrinkWrap: true, // use it
)
],
)
It happens when you do not have a $HOME/.gitconfig initialized. You may fix this as:
git config --global user.name "you name"
git config --global user.email [email protected]
git commit --amend --reset-author
tested with git version 1.7.5.4
I was looking similar but I wanted the difference in either list (uncommon elements between the 2 lists).
Let say I have:
List<String> oldKeys = Arrays.asList("key0","key1","key2","key5");
List<String> newKeys = Arrays.asList("key0","key2","key5", "key6");
And I wanted to know which key has been added and which key is removed i.e I wanted to get (key1, key6)
Using org.apache.commons.collections.CollectionUtils
List<String> list = new ArrayList<>(CollectionUtils.disjunction(newKeys, oldKeys));
Result
["key1", "key6"]
The easiest way I found is the streamlined in my following blog post:
Good luck making your code more readable, maintainable and well-tested!
Well this should change your format to text.
Worksheets("Sheetname").Activate
Worksheets("SheetName").Columns(1).Select 'or Worksheets("SheetName").Range("A:A").Select
Selection.NumberFormat = "@"
After discussion posting updated answer:
Option Explicit
Sub test()
Dim wk As String, yr As String
Dim fname As String, fpath As String
Dim owb As Workbook
With Application
.DisplayAlerts = False
.ScreenUpdating = False
.EnableEvents = False
End With
wk = ComboBox1.Value
yr = ComboBox2.Value
fname = yr & "W" & wk
fpath = "C:\Documents and Settings\jammil\Desktop\AutoFinance\ProjectControl\Data"
On Error GoTo ErrorHandler
Set owb = Application.Workbooks.Open(fpath & "\" & fname)
'Do Some Stuff
With owb
.SaveAs fpath & Format(Date, "yyyymm") & "DB" & ".xlsx", 51
.Close
End With
With Application
.DisplayAlerts = True
.ScreenUpdating = True
.EnableEvents = True
End With
Exit Sub
ErrorHandler: If MsgBox("This File Does Not Exist!", vbRetryCancel) = vbCancel Then
Else: Call Clear
End Sub
Error Handling:
You could try something like this to catch a specific error:
On Error Resume Next
Set owb = Application.Workbooks.Open(fpath & "\" & fname)
If Err.Number = 1004 Then
GoTo FileNotFound
Else
End If
...
Exit Sub
FileNotFound: If MsgBox("This File Does Not Exist!", vbRetryCancel) = vbCancel Then
Else: Call Clear
I just figured out that json_encode
does only escape \n
if it's used within single quotes.
echo json_encode("Hello World\n");
// results in "Hello World\n"
And
echo json_encode('Hello World\n');
// results in "Hello World\\\n"
Please Search Google given to the world by Larry Page and Sergey Brin.
BufferedWriter out = null;
try {
FileWriter fstream = new FileWriter("out.txt", true); //true tells to append data.
out = new BufferedWriter(fstream);
out.write("\nsue");
}
catch (IOException e) {
System.err.println("Error: " + e.getMessage());
}
finally {
if(out != null) {
out.close();
}
}
You don't need a custom control, just put your container in a border element:
<Border BorderBrush="#FF000000" BorderThickness="1" CornerRadius="8">
<Grid/>
</Border>
You can replace the <Grid/>
with any of the layout containers...
Well it was very simple. I was missing the format of the date in the json file, so I should write :
st = datetime.strptime(st, '%A %d %B %H %M')
because in the json file the date was like :
"start": "Friday 06 December 02:05",
text width can be different for different parents, for example if u add a text into h1 tag it will be wider than div or label, so my solution like this:
<h1 id="header1">
</h1>
alert(calcTextWidth("bir iki", $("#header1")));
function calcTextWidth(text, parentElem){
var Elem = $("<label></label>").css("display", "none").text(text);
parentElem.append(Elem);
var width = Elem.width();
Elem.remove();
return width;
}
Array(5)
gives you an array with length 5 but no values, hence you can't iterate over it.
Array.apply(null, Array(5)).map(function () {})
gives you an array with length 5 and undefined as values, now it can be iterated over.
Array.apply(null, Array(5)).map(function (x, i) { return i; })
gives you an array with length 5 and values 0,1,2,3,4.
Array(5).forEach(alert)
does nothing, Array.apply(null, Array(5)).forEach(alert)
gives you 5 alerts
ES6
gives us Array.from
so now you can also use Array.from(Array(5)).forEach(alert)
If you want to initialize with a certain value, these are good to knows...
Array.from('abcde')
, Array.from('x'.repeat(5))
or Array.from({length: 5}, (v, i) => i) // gives [0, 1, 2, 3, 4]
Just add style="text-align: left"
to your label.
Use pattern modifier sU will get the desired matching in PHP.
preg_match('/(.*)/sU',$content,$match);
http://dreamluverz.com/developers-tools/regex-match-all-including-new-line http://php.net/manual/en/reference.pcre.pattern.modifiers.php
Call the TreeView.OnAfterSelect()
protected method after you programatically select the node.
It doesn't - the C# compiler does :)
So this code:
string x = "hello";
string y = "there";
string z = "chaps";
string all = x + y + z;
actually gets compiled as:
string x = "hello";
string y = "there";
string z = "chaps";
string all = string.Concat(x, y, z);
(Gah - intervening edit removed other bits accidentally.)
The benefit of the C# compiler noticing that there are multiple string concatenations here is that you don't end up creating an intermediate string of x + y
which then needs to be copied again as part of the concatenation of (x + y)
and z
. Instead, we get it all done in one go.
EDIT: Note that the compiler can't do anything if you concatenate in a loop. For example, this code:
string x = "";
foreach (string y in strings)
{
x += y;
}
just ends up as equivalent to:
string x = "";
foreach (string y in strings)
{
x = string.Concat(x, y);
}
... so this does generate a lot of garbage, and it's why you should use a StringBuilder
for such cases. I have an article going into more details about the two which will hopefully answer further questions.
I think you may be able to do this with the metaclass. Since the metaclass can be like a class for the class (if that makes sense). I know you can assign a __call__()
method to the metaclass to override calling the class, MyClass()
. I wonder if using the property
decorator on the metaclass operates similarly. (I haven't tried this before, but now I'm curious...)
[update:]
Wow, it does work:
class MetaClass(type):
def getfoo(self):
return self._foo
foo = property(getfoo)
@property
def bar(self):
return self._bar
class MyClass(object):
__metaclass__ = MetaClass
_foo = 'abc'
_bar = 'def'
print MyClass.foo
print MyClass.bar
Note: This is in Python 2.7. Python 3+ uses a different technique to declare a metaclass. Use: class MyClass(metaclass=MetaClass):
, remove __metaclass__
, and the rest is the same.
I'd very simply:
I use a slight evolution of @hugo_leonardo 's solution:
<?php
return (object) array(
'host' => 'localhost',
'username' => 'root',
'pass' => 'password',
'database' => 'db'
);
?>
This allows you to use the object syntax when you include the php : $configs->host
instead of $configs['host']
.
Also, if your app has configs you need on the client side (like for an Angular app), you can have this config.php
file contain all your configs (centralized in one file instead of one for JavaScript and one for PHP). The trick would then be to have another PHP file that would echo
only the client side info (to avoid showing info you don't want to show like database connection string). Call it say get_app_info.php
:
<?php
$configs = include('config.php');
echo json_encode($configs->app_info);
?>
The above assuming your config.php
contains an app_info
parameter:
<?php
return (object) array(
'host' => 'localhost',
'username' => 'root',
'pass' => 'password',
'database' => 'db',
'app_info' => array(
'appName'=>"App Name",
'appURL'=> "http://yourURL/#/"
)
);
?>
So your database's info stays on the server side, but your app info is accessible from your JavaScript, with for example a $http.get('get_app_info.php').then(...);
type of call.
If the list to compare against is large, (ie the manilaListRange range in the example above), it is a smart move to use the match function. It avoids the use of a loop which could slow down the procedure. If you can ensure that the manilaListRange is all upper or lower case then this seems to be the best option to me. It is quick to apply 'UCase' or 'LCase' as you do your match.
If you did not have control over the ManilaListRange then you might have to resort to looping through this range in which case there are many ways to compare 'search', 'Instr', 'replace' etc.
HTML
<input name="email" placeholder="Email" (blur)="$event.target.value=removeSpaces($event.target.value)" value="">
TS
removeSpaces(string) {
let splitStr = string.split(' ').join('');
return splitStr;
}
If you just want to add a string to it, the simple answer is:
ListBox.Items.Add("some text");
Versioning of assemblies in .NET can be a confusing prospect given that there are currently at least three ways to specify a version for your assembly.
Here are the three main version-related assembly attributes:
// Assembly mscorlib, Version 2.0.0.0
[assembly: AssemblyFileVersion("2.0.50727.3521")]
[assembly: AssemblyInformationalVersion("2.0.50727.3521")]
[assembly: AssemblyVersion("2.0.0.0")]
By convention, the four parts of the version are referred to as the Major Version, Minor Version, Build, and Revision.
AssemblyFileVersion
is intended to uniquely identify a build of the individual assemblyTypically you’ll manually set the Major and Minor AssemblyFileVersion to reflect the version of the assembly, then increment the Build and/or Revision every time your build system compiles the assembly. The AssemblyFileVersion should allow you to uniquely identify a build of the assembly, so that you can use it as a starting point for debugging any problems.
On my current project we have the build server encode the changelist number from our source control repository into the Build and Revision parts of the AssemblyFileVersion. This allows us to map directly from an assembly to its source code, for any assembly generated by the build server (without having to use labels or branches in source control, or manually keeping any records of released versions).
This version number is stored in the Win32 version resource and can be seen when viewing the Windows Explorer property pages for the assembly.
The CLR does not care about nor examine the AssemblyFileVersion.
AssemblyInformationalVersion
is intended to represent the version of your entire productThe AssemblyInformationalVersion is intended to allow coherent versioning of the entire product, which may consist of many assemblies that are independently versioned, perhaps with differing versioning policies, and potentially developed by disparate teams.
“For example, version 2.0 of a product might contain several assemblies; one of these assemblies is marked as version 1.0 since it’s a new assembly that didn’t ship in version 1.0 of the same product. Typically, you set the major and minor parts of this version number to represent the public version of your product. Then you increment the build and revision parts each time you package a complete product with all its assemblies.” — Jeffrey Richter, [CLR via C# (Second Edition)] p. 57
The CLR does not care about nor examine the AssemblyInformationalVersion.
AssemblyVersion
is the only version the CLR cares about (but it cares about the entire AssemblyVersion
)The AssemblyVersion is used by the CLR to bind to strongly named assemblies. It is stored in the AssemblyDef manifest metadata table of the built assembly, and in the AssemblyRef table of any assembly that references it.
This is very important, because it means that when you reference a strongly named assembly, you are tightly bound to a specific AssemblyVersion of that assembly. The entire AssemblyVersion must be an exact match for the binding to succeed. For example, if you reference version 1.0.0.0 of a strongly named assembly at build-time, but only version 1.0.0.1 of that assembly is available at runtime, binding will fail! (You will then have to work around this using Assembly Binding Redirection.)
AssemblyVersion
has to match. (Yes, it does.)There is a little confusion around whether the entire AssemblyVersion has to be an exact match in order for an assembly to be loaded. Some people are under the false belief that only the Major and Minor parts of the AssemblyVersion have to match in order for binding to succeed. This is a sensible assumption, however it is ultimately incorrect (as of .NET 3.5), and it’s trivial to verify this for your version of the CLR. Just execute this sample code.
On my machine the second assembly load fails, and the last two lines of the fusion log make it perfectly clear why:
.NET Framework Version: 2.0.50727.3521
---
Attempting to load assembly: Rhino.Mocks, Version=3.5.0.1337, Culture=neutral, PublicKeyToken=0b3305902db7183f
Successfully loaded assembly: Rhino.Mocks, Version=3.5.0.1337, Culture=neutral, PublicKeyToken=0b3305902db7183f
---
Attempting to load assembly: Rhino.Mocks, Version=3.5.0.1336, Culture=neutral, PublicKeyToken=0b3305902db7183f
Assembly binding for failed:
System.IO.FileLoadException: Could not load file or assembly 'Rhino.Mocks, Version=3.5.0.1336, Culture=neutral,
PublicKeyToken=0b3305902db7183f' or one of its dependencies. The located assembly's manifest definition
does not match the assembly reference. (Exception from HRESULT: 0x80131040)
File name: 'Rhino.Mocks, Version=3.5.0.1336, Culture=neutral, PublicKeyToken=0b3305902db7183f'
=== Pre-bind state information ===
LOG: User = Phoenix\Dani
LOG: DisplayName = Rhino.Mocks, Version=3.5.0.1336, Culture=neutral, PublicKeyToken=0b3305902db7183f
(Fully-specified)
LOG: Appbase = [...]
LOG: Initial PrivatePath = NULL
Calling assembly : AssemblyBinding, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.
===
LOG: This bind starts in default load context.
LOG: No application configuration file found.
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\machine.config.
LOG: Post-policy reference: Rhino.Mocks, Version=3.5.0.1336, Culture=neutral, PublicKeyToken=0b3305902db7183f
LOG: Attempting download of new URL [...].
WRN: Comparing the assembly name resulted in the mismatch: Revision Number
ERR: Failed to complete setup of assembly (hr = 0x80131040). Probing terminated.
I think the source of this confusion is probably because Microsoft originally intended to be a little more lenient on this strict matching of the full AssemblyVersion, by matching only on the Major and Minor version parts:
“When loading an assembly, the CLR will automatically find the latest installed servicing version that matches the major/minor version of the assembly being requested.” — Jeffrey Richter, [CLR via C# (Second Edition)] p. 56
This was the behaviour in Beta 1 of the 1.0 CLR, however this feature was removed before the 1.0 release, and hasn’t managed to re-surface in .NET 2.0:
“Note: I have just described how you should think of version numbers. Unfortunately, the CLR doesn’t treat version numbers this way. [In .NET 2.0], the CLR treats a version number as an opaque value, and if an assembly depends on version 1.2.3.4 of another assembly, the CLR tries to load version 1.2.3.4 only (unless a binding redirection is in place). However, Microsoft has plans to change the CLR’s loader in a future version so that it loads the latest build/revision for a given major/minor version of an assembly. For example, on a future version of the CLR, if the loader is trying to find version 1.2.3.4 of an assembly and version 1.2.5.0 exists, the loader with automatically pick up the latest servicing version. This will be a very welcome change to the CLR’s loader — I for one can’t wait.” — Jeffrey Richter, [CLR via C# (Second Edition)] p. 164 (Emphasis mine)
As this change still hasn’t been implemented, I think it’s safe to assume that Microsoft had back-tracked on this intent, and it is perhaps too late to change this now. I tried to search around the web to find out what happened with these plans, but I couldn’t find any answers. I still wanted to get to the bottom of it.
So I emailed Jeff Richter and asked him directly — I figured if anyone knew what happened, it would be him.
He replied within 12 hours, on a Saturday morning no less, and clarified that the .NET 1.0 Beta 1 loader did implement this ‘automatic roll-forward’ mechanism of picking up the latest available Build and Revision of an assembly, but this behaviour was reverted before .NET 1.0 shipped. It was later intended to revive this but it didn’t make it in before the CLR 2.0 shipped. Then came Silverlight, which took priority for the CLR team, so this functionality got delayed further. In the meantime, most of the people who were around in the days of CLR 1.0 Beta 1 have since moved on, so it’s unlikely that this will see the light of day, despite all the hard work that had already been put into it.
The current behaviour, it seems, is here to stay.
It is also worth noting from my discussion with Jeff that AssemblyFileVersion was only added after the removal of the ‘automatic roll-forward’ mechanism — because after 1.0 Beta 1, any change to the AssemblyVersion was a breaking change for your customers, there was then nowhere to safely store your build number. AssemblyFileVersion is that safe haven, since it’s never automatically examined by the CLR. Maybe it’s clearer that way, having two separate version numbers, with separate meanings, rather than trying to make that separation between the Major/Minor (breaking) and the Build/Revision (non-breaking) parts of the AssemblyVersion.
AssemblyVersion
The moral is that if you’re shipping assemblies that other developers are going to be referencing, you need to be extremely careful about when you do (and don’t) change the AssemblyVersion of those assemblies. Any changes to the AssemblyVersion will mean that application developers will either have to re-compile against the new version (to update those AssemblyRef entries) or use assembly binding redirects to manually override the binding.
Just take another look at the version attributes on mscorlib:
// Assembly mscorlib, Version 2.0.0.0
[assembly: AssemblyFileVersion("2.0.50727.3521")]
[assembly: AssemblyInformationalVersion("2.0.50727.3521")]
[assembly: AssemblyVersion("2.0.0.0")]
Note that it’s the AssemblyFileVersion that contains all the interesting servicing information (it’s the Revision part of this version that tells you what Service Pack you’re on), meanwhile the AssemblyVersion is fixed at a boring old 2.0.0.0. Any change to the AssemblyVersion would force every .NET application referencing mscorlib.dll to re-compile against the new version!
To give you a different perspective on this, using throw is particularly useful if you're providing an API to a client and you want to provide verbose stack trace information for your internal library. By using throw here, I'd get the stack trace in this case of the System.IO.File library for File.Delete. If I use throw ex, then that information will not be passed to my handler.
static void Main(string[] args) {
Method1();
}
static void Method1() {
try {
Method2();
} catch (Exception ex) {
Console.WriteLine("Exception in Method1");
}
}
static void Method2() {
try {
Method3();
} catch (Exception ex) {
Console.WriteLine("Exception in Method2");
Console.WriteLine(ex.TargetSite);
Console.WriteLine(ex.StackTrace);
Console.WriteLine(ex.GetType().ToString());
}
}
static void Method3() {
Method4();
}
static void Method4() {
try {
System.IO.File.Delete("");
} catch (Exception ex) {
// Displays entire stack trace into the .NET
// or custom library to Method2() where exception handled
// If you want to be able to get the most verbose stack trace
// into the internals of the library you're calling
throw;
// throw ex;
// Display the stack trace from Method4() to Method2() where exception handled
}
}
Converting Bitmap
to File
needs to be done in background (NOT IN THE MAIN THREAD) it hangs the UI specially if the bitmap
was large
File file;
public class fileFromBitmap extends AsyncTask<Void, Integer, String> {
Context context;
Bitmap bitmap;
String path_external = Environment.getExternalStorageDirectory() + File.separator + "temporary_file.jpg";
public fileFromBitmap(Bitmap bitmap, Context context) {
this.bitmap = bitmap;
this.context= context;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
// before executing doInBackground
// update your UI
// exp; make progressbar visible
}
@Override
protected String doInBackground(Void... params) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
file = new File(Environment.getExternalStorageDirectory() + File.separator + "temporary_file.jpg");
try {
FileOutputStream fo = new FileOutputStream(file);
fo.write(bytes.toByteArray());
fo.flush();
fo.close();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
// back to main thread after finishing doInBackground
// update your UI or take action after
// exp; make progressbar gone
sendFile(file);
}
}
Calling it
new fileFromBitmap(my_bitmap, getApplicationContext()).execute();
you MUST use the file
in onPostExecute
.
To change directory of file
to be stored in cache
replace line :
file = new File(Environment.getExternalStorageDirectory() + File.separator + "temporary_file.jpg");
with :
file = new File(context.getCacheDir(), "temporary_file.jpg");
You have to create an instance of one of the subclasses. Stream
is an abstract class that can't be instantiated directly.
There are a bunch of choices if you look at the bottom of the reference here:
Stream Class | Microsoft Developer Network
The most common probably being FileStream
or MemoryStream
. Basically, you need to decide where you wish the data backing your stream to come from, then create an instance of the appropriate subclass.