In my case I was using invalid templateUrl.By correcting it problem solved.
@Component({
selector: 'app-edit-feather-object',
templateUrl: ''
})
node does something like this:
module.exports = exports = {}
module.exports and exports refer to same object.
This is done just for convenience. so instead of writing something like this
module.exports.PI = 3.14
we can write
exports.PI = 3.14
so it is ok to add a property to exports but assigning it to a different object is not ok
exports.add = function(){
.
.
}
? this is OK and same as module.exports.add = function(){...}
exports = function(){
.
.
}
? this is not ok and and empty object will be returned as module.exports still refers to {} and exports refer to different object.
why both are used here
I believe they just want to be clear that module.exports
, exports
, and nano
point to the same function - allowing you to use either variable to call the function within the file. nano
provides some context to what the function does.
exports
won't be exported (only module.exports
will), so why bother overwriting that as well?
The verbosity trade-off limits the risk of future bugs, such as using exports
instead of module.exports
within the file. It also provides clarification that module.exports
and exports
are in fact pointing to the same value.
module.exports
vs exports
As long as you don't reassign module.exports
or exports
(and instead add values to the object they both refer to), you won't have any issues and can safely use exports
to be more concise.
When assigning either to a non-object, they are now pointing to different places which can be confusing unless you intentionally want module.exports
to be something specific (such as a function).
Setting exports
to a non-object doesn't make much sense as you'll have to set module.exports = exports
at the end to be able to use it in other files.
let module = { exports: {} };
let exports = module.exports;
exports.msg = 'hi';
console.log(module.exports === exports); // true
exports = 'yo';
console.log(module.exports === exports); // false
exports = module.exports;
console.log(module.exports === exports); // true
module.exports = 'hello';
console.log(module.exports === exports); // false
module.exports = exports;
console.log(module.exports === exports); // true
module.exports
to a function?More concise! Compare how much shorter the 2nd example is:
helloWorld1.js:module.exports.hello = () => console.log('hello world');
app1.js: let sayHello = require('./helloWorld1'); sayHello.hello; // hello world
module.exports = () => console.log('hello world');
app2.js: let sayHello = require('./helloWorld2'); sayHello; // hello world
AMD:
CommonJS:
AMD
enforces. In my opinion, some of the node.js examples are quite contrived.
You might expect to see something more like this in the real world
// square.js
function Square(width) {
if (!(this instanceof Square)) {
return new Square(width);
}
this.width = width;
};
Square.prototype.area = function area() {
return Math.pow(this.width, 2);
};
module.exports = Square;
Usage
var Square = require("./square");
// you can use `new` keyword
var s = new Square(5);
s.area(); // 25
// or you can skip it!
var s2 = Square(10);
s2.area(); // 100
For the ES6 people
class Square {
constructor(width) {
this.width = width;
}
area() {
return Math.pow(this.width, 2);
}
}
export default Square;
Using it in ES6
import Square from "./square";
// ...
When using a class, you must use the new
keyword to instatiate it. Everything else stays the same.
I have done it using the following code,
glBegin(GL.GL_LINE_LOOP);
for(int i =0; i <= 300; i++){
double angle = 2 * Math.PI * i / 300;
double x = Math.cos(angle);
double y = Math.sin(angle);
gl.glVertex2d(x,y);
}
glEnd();
I do:
git mv {old} {new}
git add -u {new}
There doesn't seem to be a standardized default value. I have the feeling the default is 0
, and the timeout event left totally dependent on browser and network settings.
For IE, there is a timeout property for XMLHTTPRequests here. It defaults to null, and it says the network stack is likely to be the first to time out (which will not generate an ontimeout event by the way).
Management studio creates scripts like:
insert table1 (foodate) values(CAST(N'2012-06-18 10:34:09.000' AS DateTime))
use
LDFLAGS= -L<Directory where the library resides> -l<library name>
Like :
LDFLAGS = -L. -lmine
for ensuring static compilation you can also add
LDFLAGS = -static
Or you can just get rid of the whole library searching, and link with with it directly.
say you have main.c fun.c
and a static library libmine.a
then you can just do in your final link line of the Makefile
$(CC) $(CFLAGS) main.o fun.o libmine.a
The content of the Manifest file in a JAR file created with version 1.0 of the Java Development Kit is the following.
Manifest-Version: 1.0
All the entries are as name-value pairs. The name of a header is separated from its value by a colon. The default manifest shows that it conforms to version 1.0 of the manifest specification. The manifest can also contain information about the other files that are packaged in the archive. Exactly what file information is recorded in the manifest will depend on the intended use for the JAR file. The default manifest file makes no assumptions about what information it should record about other files, so its single line contains data only about itself. Special-Purpose Manifest Headers
Depending on the intended role of the JAR file, the default manifest may have to be modified. If the JAR file is created only for the purpose of archival, then the MANIFEST.MF file is of no purpose. Most uses of JAR files go beyond simple archiving and compression and require special information to be in the manifest file. Summarized below are brief descriptions of the headers that are required for some special-purpose JAR-file functions
Applications Bundled as JAR Files: If an application is bundled in a JAR file, the Java Virtual Machine needs to be told what the entry point to the application is. An entry point is any class with a public static void main(String[] args) method. This information is provided in the Main-Class header, which has the general form:
Main-Class: classname
The value classname is to be replaced with the application's entry point.
Download Extensions: Download extensions are JAR files that are referenced by the manifest files of other JAR files. In a typical situation, an applet will be bundled in a JAR file whose manifest references a JAR file (or several JAR files) that will serve as an extension for the purposes of that applet. Extensions may reference each other in the same way. Download extensions are specified in the Class-Path header field in the manifest file of an applet, application, or another extension. A Class-Path header might look like this, for example:
Class-Path: servlet.jar infobus.jar acme/beans.jar
With this header, the classes in the files servlet.jar, infobus.jar, and acme/beans.jar will serve as extensions for purposes of the applet or application. The URLs in the Class-Path header are given relative to the URL of the JAR file of the applet or application.
Package Sealing: A package within a JAR file can be optionally sealed, which means that all classes defined in that package must be archived in the same JAR file. A package might be sealed to ensure version consistency among the classes in your software or as a security measure. To seal a package, a Name header needs to be added for the package, followed by a Sealed header, similar to this:
Name: myCompany/myPackage/
Sealed: true
The Name header's value is the package's relative pathname. Note that it ends with a '/' to distinguish it from a filename. Any headers following a Name header, without any intervening blank lines, apply to the file or package specified in the Name header. In the above example, because the Sealed header occurs after the Name: myCompany/myPackage header, with no blank lines between, the Sealed header will be interpreted as applying (only) to the package myCompany/myPackage.
Package Versioning: The Package Versioning specification defines several manifest headers to hold versioning information. One set of such headers can be assigned to each package. The versioning headers should appear directly beneath the Name header for the package. This example shows all the versioning headers:
Name: java/util/
Specification-Title: "Java Utility Classes"
Specification-Version: "1.2"
Specification-Vendor: "Sun Microsystems, Inc.".
Implementation-Title: "java.util"
Implementation-Version: "build57"
Implementation-Vendor: "Sun Microsystems, Inc."
In my case I preferred to extract a String then browse the context using JsonNode interface
var response = restTemplate.exchange("https://my-url", HttpMethod.GET, entity, String.class);
if (response.getStatusCode() == HttpStatus.OK) {
var jsonString = response.getBody();
ObjectMapper mapper = new ObjectMapper();
JsonNode actualObj = mapper.readTree(jsonString);
System.out.println(actualObj);
}
or quickly
ObjectNode actualObj= restTemplate.getForObject("https://my-url", ObjectNode.class);
then read inner data with path expression i.e.
boolean b = actualObj.at("/0/states/0/no_data").asBoolean();
As mentioned here: Re: BUG #4243: Idle in transaction it is probably best to check your pg_locks table to see what is being locked and that might give you a better clue where the problem lies.
Do you have a lot of applications running when you are trying this? I encounter weird behavior at work sometimes because my system runs out of GDI Handles as I have so many windows open (our apps use alot).
When this happens, windows and context menus no long appear until I close something to free up some GDI handles.
The default limit in XP and Vista is 10000. It is not uncommon for my DevStudio to have 1500 GDI handles, so if you have a couple of copies of Dev studio open, it can eat them up pretty quickly. You can add a column in TaskManager to see how many handles are being used by each process.
There is a registry tweak you can do to increase the limit.
For more information see http://msdn.microsoft.com/en-us/library/ms724291(VS.85).aspx
Very simply:
$id = substr($url, strrpos($url, '/') + 1);
strrpos gets the position of the last occurrence of the slash; substr returns everything after that position.
As mentioned by redanimalwar if there is no slash this doesn't work correctly since strrpos
returns false. Here's a more robust version:
$pos = strrpos($url, '/');
$id = $pos === false ? $url : substr($url, $pos + 1);
The date format for mysql insert query is YYYY-MM-DD
example:
INSERT INTO table_name (date_column) VALUE ('YYYY-MM-DD');
Simply specify the path to the libraries:
echo "-Djava.library.path=/usr/lib/jni/" >> /etc/eclipse.ini
Another alternative is that you are allowed to have multiple classes in a tag. Consider:
<div class="button big">This is a big button</div>
<div class="button small">This is a small button</div>
And the CSS:
.button {
/* all your common button styles */
}
.big {
height: 60px;
width: 100px;
}
.small {
height: 40px;
width: 70px;
}
and so on.
Try this
<androidx.appcompat.widget.AppCompatButton
android:layout_width="wrap_content"
android:layout_height="34dp"
android:text="Check Out"
android:textAllCaps="true"
android:background="#54c2bc"
android:textColor="#FFFFFF"
android:textSize="9sp"/>
Have you considered using factory functions? They usually are a much better alternative to classes or constructor functions in Javascript. Here is an example of how it works:
function car () {
var privateVariable = 4
function privateFunction () {}
return {
color: 'red',
drive: function (miles) {},
stop: function() {}
....
}
}
Thanks to closures you have access to all private functions and variabels inside the returned object, but you can not access them from outside.
You can also use:
@if(string.IsNullOrEmpty(Model.CreatorFullName))
{
...your code...
}
No need for a variable in the code
There are a few different approaches here: UIAnimations to my recollection it sounds like your challenge.
Edit: too lazy of me:)
In the post, I was referring to this method:
[newView setFrame:CGRectMake( 0.0f, 480.0f, 320.0f, 480.0f)]; //notice this is OFF screen!
[UIView beginAnimations:@"animateTableView" context:nil];
[UIView setAnimationDuration:0.4];
[newView setFrame:CGRectMake( 0.0f, 0.0f, 320.0f, 480.0f)]; //notice this is ON screen!
[UIView commitAnimations];
But instead of animation the frame, you animate the alpha:
[newView setAlpha:0.0]; // set it to zero so it is all gone.
[UIView beginAnimations:@"animateTableView" context:nil];
[UIView setAnimationDuration:0.4];
[newView setAlpha:0.5]; //this will change the newView alpha from its previous zero value to 0.5f
[UIView commitAnimations];
If the goal is to create a grid with equal height rows, where the tallest cell in the grid sets the height for all rows, here's a quick and simple solution:
grid-auto-rows: 1fr
Grid Layout provides a unit for establishing flexible lengths in a grid container. This is the fr
unit. It is designed to distribute free space in the container and is somewhat analogous to the flex-grow
property in flexbox.
If you set all rows in a grid container to 1fr
, let's say like this:
grid-auto-rows: 1fr;
... then all rows will be equal height.
It doesn't really make sense off-the-bat because fr
is supposed to distribute free space. And if several rows have content with different heights, then when the space is distributed, some rows would be proportionally smaller and taller.
Except, buried deep in the grid spec is this little nugget:
7.2.3. Flexible Lengths: the
fr
unit...
When the available space is infinite (which happens when the grid container’s width or height is indefinite), flex-sized (
fr
) grid tracks are sized to their contents while retaining their respective proportions.The used size of each flex-sized grid track is computed by determining the
max-content
size of each flex-sized grid track and dividing that size by the respective flex factor to determine a “hypothetical1fr
size”.The maximum of those is used as the resolved
1fr
length (the flex fraction), which is then multiplied by each grid track’s flex factor to determine its final size.
So, if I'm reading this correctly, when dealing with a dynamically-sized grid (e.g., the height is indefinite), grid tracks (rows, in this case) are sized to their contents.
The height of each row is determined by the tallest (max-content
) grid item.
The maximum height of those rows becomes the length of 1fr
.
That's how 1fr
creates equal height rows in a grid container.
As noted in the question, equal height rows are not possible with flexbox.
Flex items can be equal height on the same row, but not across multiple rows.
This behavior is defined in the flexbox spec:
In a multi-line flex container, the cross size of each line is the minimum size necessary to contain the flex items on the line.
In other words, when there are multiple lines in a row-based flex container, the height of each line (the "cross size") is the minimum height necessary to contain the flex items on the line.
Sub LoopRange()
Dim rCell As Range
Dim rRng As Range
Set rRng = Sheet1.Range("A1:A6")
For Each rCell In rRng.Cells
Debug.Print rCell.Address, rCell.Value
Next rCell
End Sub
Use git merge --squash branch_name
this will get all changes from the other branch and will prepare a commit for you.
Now remove all unneeded changes and leave the one you want. And git will not know that there was a merge.
For Windows Users
One simple solution is to set the SDK path to the Enviroment Variables list.
Note:
Your Android Sdk is generally located in
C:\Users\YourUserName\AppData\Local\Android\Sdk
Make sure to close your current terminal because your terminal holds all of your pre-existing Environment Variables.
MyClass obj = new MyClass();
ArrayList<Integer> numbers = obj.myNumbers();
Take a look at CloneVDI from the VirtualBox site... 100% painless!
There might be neater methods, but the following could be one approach:
SELECT t.fk,
(
SELECT t1.Field1
FROM `table` t1
WHERE t1.fk = t.fk AND t1.Field1 IS NOT NULL
LIMIT 1
) Field1,
(
SELECT t2.Field2
FROM `table` t2
WHERE t2.fk = t.fk AND t2.Field2 IS NOT NULL
LIMIT 1
) Field2
FROM `table` t
WHERE t.fk = 3
GROUP BY t.fk;
Test Case:
CREATE TABLE `table` (fk int, Field1 varchar(10), Field2 varchar(10));
INSERT INTO `table` VALUES (3, 'ABC', NULL);
INSERT INTO `table` VALUES (3, NULL, 'DEF');
INSERT INTO `table` VALUES (4, 'GHI', NULL);
INSERT INTO `table` VALUES (4, NULL, 'JKL');
INSERT INTO `table` VALUES (5, NULL, 'MNO');
Result:
+------+--------+--------+
| fk | Field1 | Field2 |
+------+--------+--------+
| 3 | ABC | DEF |
+------+--------+--------+
1 row in set (0.01 sec)
Running the same query without the WHERE t.fk = 3
clause, it would return the following result-set:
+------+--------+--------+
| fk | Field1 | Field2 |
+------+--------+--------+
| 3 | ABC | DEF |
| 4 | GHI | JKL |
| 5 | NULL | MNO |
+------+--------+--------+
3 rows in set (0.01 sec)
keras predict_classes (docs) outputs A numpy array of class predictions. Which in your model case, the index of neuron of highest activation from your last(softmax) layer. [[0]]
means that your model predicted that your test data is class 0. (usually you will be passing multiple image, and the result will look like [[0], [1], [1], [0]]
)
You must convert your actual label (e.g. 'cancer', 'not cancer'
) into binary encoding (0
for 'cancer', 1
for 'not cancer') for binary classification. Then you will interpret your sequence output of [[0]]
as having class label 'cancer'
Couldn't you just pass the arguments
array along?
function mainfunc (func){
// remove the first argument containing the function name
arguments.shift();
window[func].apply(null, arguments);
}
function calledfunc1(args){
// Do stuff here
}
function calledfunc2(args){
// Do stuff here
}
mainfunc('calledfunc1','hello','bye');
mainfunc('calledfunc2','hello','bye','goodbye');
Since it doesn't appear that anyone has mentioned it here yet, the new best way to manage HttpClient and HttpClientHandler in .NET Core 2.1 is using HttpClientFactory.
It solves most of the aforementioned issues and gotchas in a clean and easy-to-use way. From Steve Gordon's great blog post:
Add the following packages to your .Net Core (2.1.1 or later) project:
Microsoft.AspNetCore.All
Microsoft.Extensions.Http
Add this to Startup.cs:
services.AddHttpClient();
Inject and use:
[Route("api/[controller]")]
public class ValuesController : Controller
{
private readonly IHttpClientFactory _httpClientFactory;
public ValuesController(IHttpClientFactory httpClientFactory)
{
_httpClientFactory = httpClientFactory;
}
[HttpGet]
public async Task<ActionResult> Get()
{
var client = _httpClientFactory.CreateClient();
var result = await client.GetStringAsync("http://www.google.com");
return Ok(result);
}
}
Explore the series of posts in Steve's blog for lots more features.
It depends if you just care that the variable has been defined or if you want it to have a meaningful value.
Checking if the type is undefined will check if the variable has been defined yet.
=== null
or !== null
will only check if the value of the variable is exactly null
.
== null
or != null
will check if the value is undefined
or null
.
if(value)
will check if the variable is undefined
, null
, 0
, or an empty string.
I posted too soon however the ways to configure are given in below link
http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html
and way to get access keys are given in below link
http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-set-up.html#cli-signup
There are a lot of sources for selenium - here is good one for simple use Selenium, and here is a example snippet too Selenium Examples
You can find a lot of good sources to use selenium, it's not too hard to get it set up and start using it.
Using jQuery, I would suggest a shorter solution.
var elementClicked;
$("element").click(function(){
elementClicked = true;
});
if( elementClicked != true ) {
alert("element not clicked");
}else{
alert("element clicked");
}
("element" here is to be replaced with the actual name tag)
Please try the below code for repeated fade-out/fade-in animation
AlphaAnimation anim = new AlphaAnimation(1.0f, 0.3f);
anim.setRepeatCount(Animation.INFINITE);
anim.setRepeatMode(Animation.REVERSE);
anim.setDuration(300);
view.setAnimation(anim); // to start animation
view.setAnimation(null); // to stop animation
Update Sep 2017 - tl;dr
Download a single file from a remote ftp server to your machine:
sftp {user}@{host}:{remoteFileName} {localFileName}
Upload a single file from your machine to a remote ftp server:
sftp {user}@{host}:{remote_dir} <<< $'put {local_file_path}'
Original answer:
Ok, so I feel a little dumb. But I figured it out. I almost had it at the top with:
sftp user@host remoteFile localFile
The only documentation shown in the terminal is this:
sftp [user@]host[:file ...]
sftp [user@]host[:dir[/]]
However, I came across this site which shows the following under the synopsis:
sftp [-vC1 ] [-b batchfile ] [-o ssh_option ] [-s subsystem | sftp_server ] [-B buffer_size ] [-F ssh_config ] [-P sftp_server path ] [-R num_requests ] [-S program ] host
sftp [[user@]host[:file [file]]]
sftp [[user@]host[:dir[/]]]
So the simple answer is you just do :
after your user and host then the remote file and local filename. Incredibly simple!
Single line, sftp copy remote file:
sftp username@hostname:remoteFileName localFileName
sftp kyle@kylesserver:/tmp/myLogFile.log /tmp/fileNameToUseLocally.log
Update Feb 2016
In case anyone is looking for the command to do the reverse of this and push a file from your local computer to a remote server in one single line sftp
command, user @Thariama below posted the solution to accomplish that. Hat tip to them for the extra code.
sftp {user}@{host}:{remote_dir} <<< $'put {local_file_path}'
You can use \t
to create a tab in a file.
git log -1 --abbrev-commit
will also do it.
git log --abbrev-commit
will list the log entries with abbreviated SHA-1 checksum.
To get activity state data stored in onCreate()
, first you have to save data in savedInstanceState by overriding SaveInstanceState(Bundle savedInstanceState)
method.
When activity destroy SaveInstanceState(Bundle savedInstanceState)
method gets called and there you save data you want to save. And you get same in onCreate()
when activity restart.(savedInstanceState wont be null since you have saved some data in it before activity get destroyed)
Here is the snippets from my code.. If it solves your problems..
Set jsonpCallBack : 'photos' and dataType:'jsonp'
$('document').ready(function() {
var pm_url = 'http://localhost:8080/diztal/rest/login/test_cor?sessionKey=4324234';
$.ajax({
crossDomain: true,
url: pm_url,
type: 'GET',
dataType: 'jsonp',
jsonpCallback: 'photos'
});
});
function photos (data) {
alert(data);
$("#twitter_followers").html(data.responseCode);
};
@Path("/test_cor")
@GET
@Produces(MediaType.TEXT_PLAIN)
public String testCOR(@QueryParam("sessionKey") String sessionKey, @Context HttpServletRequest httpRequest) {
ResponseJSON<LoginResponse> resp = new ResponseJSON<LoginResponse>();
resp.setResponseCode(sessionKey);
resp.setResponseText("Wrong Passcode");
resp.setResponseTypeClass("Login");
Gson gson = new Gson();
return "photos("+gson.toJson(resp)+")"; // CHECK_THIS_LINE
}
Here is a very simple way to do it by hand. You could also use the <algorithm>
, as Peter suggests.
#include <iostream>
int find(int arr[], int len, int seek)
{
for (int i = 0; i < len; ++i)
{
if (arr[i] == seek) return i;
}
return -1;
}
int main()
{
int arr[ 5 ] = { 4, 1, 3, 2, 6 };
int x = find(arr,5,3);
std::cout << x << std::endl;
}
If you have the button object, called b: b.disabled=false;
I suggest you to read the Enumeration: Traversing a Collection’s Elements part of the Collections Programming Guide for Cocoa. There is a sample code for your need.
Lets look at this code (jdk1.8)
@Test
public void testArraySize() throws Exception {
List<String> list = new ArrayList<>();
list.add("ds");
list.add("cx");
list.add("cx");
list.add("ww");
list.add("ds");
list.add("cx");
list.add("cx");
list.add("ww");
list.add("ds");
list.add("cx");
list.add("last");
}
1)Put break point on the line when "last" is inserted
2)Go to the add method of ArrayList
You will see
ensureCapacityInternal(size + 1); // Increments modCount!!
elementData[size++] = e;
3) Go to ensureCapacityInternal method this method call ensureExplicitCapacity
4)
private void ensureExplicitCapacity(int minCapacity) {
modCount++;
// overflow-conscious code
if (minCapacity - elementData.length > 0)
grow(minCapacity);
}
return true;
In our example minCapacity is equal to 11 11-10 > 0
therefore You need grow
method
5)
private void grow(int minCapacity) {
// overflow-conscious code
int oldCapacity = elementData.length;
int newCapacity = oldCapacity + (oldCapacity >> 1);
if (newCapacity - minCapacity < 0)
newCapacity = minCapacity;
if (newCapacity - MAX_ARRAY_SIZE > 0)
newCapacity = hugeCapacity(minCapacity);
// minCapacity is usually close to size, so this is a win:
elementData = Arrays.copyOf(elementData, newCapacity);
}
Lets describe each step:
1) oldCapacity
= 10 because we didn't put this param when ArrayList
was init ,therefore it will use default capacity(10)
2) int newCapacity = oldCapacity + (oldCapacity >> 1);
Here newCapacity is equal to oldCapacity plus oldCapacity with right shift by one
(oldCapacity is 10
this is the binary representation 00001010
moving one bit to right we will get 00000101
which is 5 in decimal therefore newCapacity
is 10 + 5 = 15
)
3)
if (newCapacity - minCapacity < 0)
newCapacity = minCapacity;
For example your init capacity is 1, when you add the second element into arrayList newCapacity
will be equal to 1(oldCapacity) + 0 (moved to right by one bit) = 1
In this case newCapacity is less than minCapacity and elementData
(array object inside arrayList) can't hold new element therefore newCapacity is equal to minCapacity
4)
if (newCapacity - MAX_ARRAY_SIZE > 0)
newCapacity = hugeCapacity(minCapacity);
Check if array size reach MAX_ARRAY_SIZE (which is Integer.MAX - 8) Why the maximum array size of ArrayList is Integer.MAX_VALUE - 8?
5) Finally it copy old values to the newArray with length 15
On a system with both Python 2 and 3 installed and with pip2
-installed Pillow failing to provide Image
, it is possible to install PIL for Python 2 in a way that will solve ImportError: No module named Image
:
easy_install-2.7 --user PIL
or
sudo easy_install-2.7 PIL
I used the below to solve this problem.
import org.apache.commons.lang.StringUtils;
StringUtils.capitalize(MyString);
Thanks to Ted Hopp for rightly pointing out that the question should have been TITLE CASE instead of modified CAMEL CASE.
Camel Case is usually without spaces between words.
Just to point out the generic way to iterate over any map:
private <K, V> void iterateOverMap(Map<K, V> map) {
for (Map.Entry<K, V> entry : map.entrySet()) {
System.out.println("key ->" + entry.getKey() + ", value->" + entry.getValue());
}
}
this one did work :
I had a situation where my database showed restoring state and I couldn't run any queries and couldn't connect with our software.
What I did to get out of this situation is:
Stop all SQL related services from windows services.
I opened the DATA folder where the Ldf and Mdf files resides in the SQL directory, normally its like : "C:\Program Files***********\MSSQL\DATA
Then I copied both the Ldf and Mdf files of the database: [db name].mdf and [db name]_log.ldf
I copied both of these files to another folder.
Then I started all the SQL related services (in step 1) again from windows services.
Started my MS SQL Management studio with normal login.
Right click on the culprit database and hit DELETE (to delete the database at all).
All the LDF and MDF files related to this database have gone from DATA folder (mentioned in step 2).
Created a new database with the same name (same name of the one I deleted in step 6 - the culprit database).
Then [database name]->right click -> tasks -> Take Offline.
I then Copied both the files (from step 3) back to the DATA folder (step 2).
[database name]->right click -> tasks -> Bring Online.
Boost.Config offers these typedefs for toolsets that do not provide them natively. The documentation for this specific functionality is here: Standard Integer Types
You could make your own constructor for JSON parsing:
var JSONObj = function(obj) { $.extend(this, JSON.parse(obj)); }
var test = new JSONObj('{"a": "apple"}');
//{a: "apple"}
Then check instanceof to see if it needed parsing originally
test instanceof JSONObj
Padding around the collapsing div must be 0
For me I had multiple versions of the same library included in /app/libs
. I was using Parse and I had both ParseFacebookUtilsV3-1.9.0.jar
and ParseFacebookUtilsV4-1.9.0.jar
.
Deleting the V3
jar solves the problem.
bool isPrime(int n)
{
// Corner cases
if (n <= 1) return false;
if (n <= 3) return true;
// This is checked so that we can skip
// middle five numbers in below loop
if (n%2 == 0 || n%3 == 0) return false;
for (int i=5; i*i<=n; i=i+6)
if (n%i == 0 || n%(i+2) == 0)
return false;
return true;
}
this is just c++ implementation of above AKS algorithm
Is there a command that does?
thread apply all where
You can declare like this
CREATE PROCEDURE MyProcName
@Parameter1 INT = 1,
@Parameter2 VARCHAR (100) = 'StringValue',
@Parameter3 VARCHAR (100) = NULL
AS
/* check for the NULL / default value (indicating nothing was passed */
if (@Parameter3 IS NULL)
BEGIN
/* whatever code you desire for a missing parameter*/
INSERT INTO ........
END
/* and use it in the query as so*/
SELECT *
FROM Table
WHERE Column = @Parameter
One should preserve the previously associated onerror callback as well
<script type="text/javascript">
(function() {
var errorCallback = window.onerror;
window.onerror = function () {
// handle error condition
errorCallback && errorCallback.apply(this, arguments);
};
})();
</script>
Some links i found:
What's perplexing to me is that the visual studio designer only allows you to use BackgroundWorkers and Timers that don't actually work with the service project.
It gives you neat drag and drop controls onto your service but... don't even try deploying it. Won't work.
Services: Only use System.Timers.Timer System.Windows.Forms.Timer won't work even though it's available in the toolbox
Services: BackgroundWorkers will not work when it's running as a service Use System.Threading.ThreadPools instead or Async calls
You could create a commit which contains an empty working copy.
This is a generally safe, non-destructive approach because it does not involve the use of any brute-force reset mechanisms. First you hide all managed content with git checkout empty
, then you are free to manually review and remove whatever unmanaged content remains.
## create a stand-alone, tagged, empty commit
true | git mktree | xargs git commit-tree | xargs git tag empty
## clear the working copy
git checkout empty
Your working copy should now be clear of any managed content. All that remains are unmanaged files and the .git
folder itself.
To re-populate your working copy...
git checkout master ## or whatever branch you will be using
If you're a forward thinking individual, you might start your repository off on the right foot by basing everything on an initial empty commit...
git init
git commit --allow-empty --allow-empty-message -m ""
git tag empty
...
There are various uses for a tagged empty worktree. My favorite at the moment is to depopulate the root under a set of git worktree
subfolders.
You must update the Windows PowerShell to minimum of version 4.0 for the script below to work.
[array]$SiteLinks = "http://mypage.global/Chemical/test.html"
"http://maypage2:9080/portal/site/hotpot/test.json"
foreach($url in $SiteLinks) {
try {
Write-host "Verifying $url" -ForegroundColor Yellow
$checkConnection = Invoke-WebRequest -Uri $url
if ($checkConnection.StatusCode -eq 200) {
Write-Host "Connection Verified!" -ForegroundColor Green
}
}
catch [System.Net.WebException] {
$exceptionMessage = $Error[0].Exception
if ($exceptionMessage -match "503") {
Write-Host "Server Unavaiable" -ForegroundColor Red
}
elseif ($exceptionMessage -match "404") {
Write-Host "Page Not found" -ForegroundColor Red
}
}
}
Please be aware, this is a simplified explanation intended as a first step in seeking to understand this complex functionality.
May be helpful for visual learners who want to visualise what their project state looks like after each of these commands:
For those who use Terminal with colour turned on (git config --global color.ui auto):
git reset --soft A
and you will see B and C's stuff in green (staged and ready to commit)
git reset --mixed A
(or git reset A
) and you will see B and C's stuff in red (unstaged and ready to be staged (green) and then committed)
git reset --hard A
and you will no longer see B and C's changes anywhere (will be as if they never existed)
Or for those who use a GUI program like 'Tower' or 'SourceTree'
git reset --soft A
and you will see B and C's stuff in the 'staged files' area ready to commit
git reset --mixed A
(or git reset A
) and you will see B and C's stuff in the 'unstaged files' area ready to be moved to staged and then committed
git reset --hard A
and you will no longer see B and C's changes anywhere (will be as if they never existed)
Similar to many of the answers above that use df.to_string(index=False), I often find it necessary to extract a single column of values in which case you can specify an individual column with .to_string using the following:
data = pd.DataFrame({'col1': np.random.randint(0, 100, 10),
'col2': np.random.randint(50, 100, 10),
'col3': np.random.randint(10, 10000, 10)})
print(data.to_string(columns=['col1'], index=False)
print(data.to_string(columns=['col1', 'col2'], index=False))
Which provides an easy to copy (and index free) output for use pasting elsewhere (Excel). Sample output:
col1 col2
49 62
97 97
87 94
85 61
18 55
Install the latest STS, export its site list and import it into yours.
Just insert or update mysql.user
with value Y
in each column privileges.
Use conditional formatting instead of VBA to highlight errors.
Using a VBA loop like the one you posted will take a long time to process
the statement If cell.Value = "#N/A" Then
will never work. If you insist on using VBA to highlight errors, try this instead.
Sub ColorCells()
Dim Data As Range
Dim cell As Range
Set currentsheet = ActiveWorkbook.Sheets("Comparison")
Set Data = currentsheet.Range("A2:AW1048576")
For Each cell In Data
If IsError(cell.Value) Then
cell.Interior.ColorIndex = 3
End If
Next
End Sub
Be prepared for a long wait, since the procedure loops through 51 million cells
There are more efficient ways to achieve what you want to do. Update your question if you have a change of mind.
Well you can simply use Math.pow(a,b)
as you have used earlier and just convert its value by using (int)
before it. Below could be used as an example to it.
int x = (int) Math.pow(a,b);
where a
and b
could be double
or int
values as you want.
This will simply convert its output to an integer value as you required.
Recently have the issue. The fix which work for me was to added this to babel.config.json in the plugins section
["@babel/plugin-transform-modules-commonjs", {
"allowTopLevelThis": true,
"loose": true,
"lazy": true
}],
I had some imported module with // and the error "cannot use import outside a module".
You can use bash -x scriptname.sh
to trace it.
The normal method to send a file upload is POST, thus also post_max_size
should be 16 Mb or more.
Incidentally, also memory_limit
plays a role. It should be bigger than 16Mb, but since the default value is 128Mb, you won't see this problem. Example php.ini
configuration:
post_max_size = 16M
upload_max_filesize = 16M
memory_limit = 128M
Change these value in php.ini
if you've access to it, otherwise you can try to change them in an .htaccess
file.
php_value upload_max_filesize 16M
php_value post_max_size 16M
This will work only if the AllowOverride
settings permit it. Otherwise, you've to ask to your hosting company.
Ignore this answer for now. The other answers, particularly that of aix, are mostly correct. Over the long term they're the way to bet. And if you have enough data (on one benchmark on one machine, it seemed to be about one million entries) ArrayList and LinkedList do currently work as advertized. However, there are some fine points that apply in the early 21st century.
Modern computer technology seems, by my testing, to give an enormous edge to arrays. Elements of an array can be shifted and copied at insane speeds. As a result arrays and ArrayList will, in most practical situations, outperform LinkedList on inserts and deletes, often dramatically. In other words, ArrayList will beat LinkedList at its own game.
The downside of ArrayList is it tends to hang onto memory space after deletions, where LinkedList gives up space as it gives up entries.
The bigger downside of arrays and ArrayList is they fragment free memory and overwork the garbage collector. As an ArrayList expands, it creates new, bigger arrays, copies the old array to the new one, and frees the old one. Memory fills with big contiguous chunks of free memory that are not big enough for the next allocation. Eventually there's no suitable space for that allocation. Even though 90% of memory is free, no individual piece is big enough to do the job. The GC will work frantically to move things around, but if it takes too long to rearrange the space, it will throw an OutOfMemoryException. If it doesn't give up, it can still slow your program way down.
The worst of it is this problem can be hard to predict. Your program will run fine one time. Then, with a bit less memory available, with no warning, it slows or stops.
LinkedList uses small, dainty bits of memory and GC's love it. It still runs fine when you're using 99% of your available memory.
So in general, use ArrayList for smaller sets of data that are not likely to have most of their contents deleted, or when you have tight control over creation and growth. (For instance, creating one ArrayList that uses 90% of memory and using it without filling it for the duration of the program is fine. Continually creating and freeing ArrayList instances that use 10% of memory will kill you.) Otherwise, go with LinkedList (or a Map of some sort if you need random access). If you have very large collections (say over 100,000 elements), no concerns about the GC, and plan lots of inserts and deletes and no random access, run a few benchmarks to see what's fastest.
You could use the LINQ select
clause and reference the property that relates to your Name column.
git push --follow-tags
This is a sane option introduced in Git 1.8.3:
git push --follow-tags
It pushes both commits and only tags that are both:
This is sane because:
It is for those reasons that --tags
should be avoided.
Git 2.4 has added the push.followTags
option to turn that flag on by default which you can set with:
git config --global push.followTags true
or by adding followTags = true
to the [push]
section of your ~/.gitconfig
file.
pip3 install --trusted-host pypi.org --trusted-host files.pythonhosted.org <app>
The DUAL is special one row, one column table present by default in all Oracle databases. The owner of DUAL is SYS.
DUAL is a table automatically created by Oracle Database along with the data functions. It is always used to get the operating systems functions(like date, time, arithmetic expression., etc.)
SELECT SYSDATE from dual;
If you code on Laravel just use Illuminate\Support\Str
here is example
Str::words($category->publication->title, env('WORDS_COUNT_HOME'), '...')
Hope this was helpful.
You can use element.getBoundingClientRect()
to retrieve element position relative to the viewport.
Then use document.documentElement.scrollTop
to calculate the viewport offset.
The sum of the two will give the element position relative to the document:
element.getBoundingClientRect().top + document.documentElement.scrollTop
Don't do this!
Stay away from putting the events inline with the elements! If you don't, you're missing the point of JQuery (or one of the biggest ones at least).
The reason why it's easy to define click() handlers one way and not the other is that the other way is simply not desirable. Since you're just learning JQuery, stick to the convention. Now is not the time in your learning curve for JQuery to decide that everyone else is doing it wrong and you have a better way!
I get the error in another situation, and here are the problem and the solution:
I have 2 classes derived from a same base class named LevledItem:
public partial class Team : LeveledItem
{
//Everything is ok here!
}
public partial class Story : LeveledItem
{
//Everything is ok here!
}
But in their DbContext, I copied some code but forget to change one of the class name:
public class MFCTeamDbContext : DbContext
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
//Other codes here
modelBuilder.Entity<LeveledItem>()
.Map<Team>(m => m.Requires("Type").HasValue(ItemType.Team));
}
public class ProductBacklogDbContext : DbContext
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
//Other codes here
modelBuilder.Entity<LeveledItem>()
.Map<Team>(m => m.Requires("Type").HasValue(ItemType.Story));
}
Yes, the second Map< Team> should be Map< Story>. And it cost me half a day to figure it out!
Ex:-
var value="Data-123";
var removeData=value.replace("Data-","");
alert(removeData);
Hopefully this will work for you.
The algorithm you are using, "AES", is a shorthand for "AES/ECB/NoPadding". What this means is that you are using the AES algorithm with 128-bit key size and block size, with the ECB mode of operation and no padding.
In other words: you are only able to encrypt data in blocks of 128 bits or 16 bytes. That's why you are getting that IllegalBlockSizeException
exception.
If you want to encrypt data in sizes that are not multiple of 16 bytes, you are either going to have to use some kind of padding, or a cipher-stream. For instance, you could use CBC mode (a mode of operation that effectively transforms a block cipher into a stream cipher) by specifying "AES/CBC/NoPadding" as the algorithm, or PKCS5 padding by specifying "AES/ECB/PKCS5", which will automatically add some bytes at the end of your data in a very specific format to make the size of the ciphertext multiple of 16 bytes, and in a way that the decryption algorithm will understand that it has to ignore some data.
In any case, I strongly suggest that you stop right now what you are doing and go study some very introductory material on cryptography. For instance, check Crypto I on Coursera. You should understand very well the implications of choosing one mode or another, what are their strengths and, most importantly, their weaknesses. Without this knowledge, it is very easy to build systems which are very easy to break.
Update: based on your comments on the question, don't ever encrypt passwords when storing them at a database!!!!! You should never, ever do this. You must HASH the passwords, properly salted, which is completely different from encrypting. Really, please, don't do what you are trying to do... By encrypting the passwords, they can be decrypted. What this means is that you, as the database manager and who knows the secret key, you will be able to read every password stored in your database. Either you knew this and are doing something very, very bad, or you didn't know this, and should get shocked and stop it.
Write your first unit test
Write a JUnit test -- here's mine:
import org.junit.Assert;
import org.junit.Test;
public class MyFirstTest {
@Test
public void firstTest() {
Assert.assertTrue(true);
}
}
Use either this:
:active {
outline:none;
}
or this if that doesn't work:
:active {
outline:none !important;
}
This works for me (FF and Chrome, at least). Instead of targeting the :focus
state, just target the :active
state and that will remove the aesthetically obtrusive highlighting in your browser when a user clicks a link. But it will still retain the focus states when a user with disabilities tabs or shift-tabs through a page. Both parties are happy. :)
First of all install nodejs:
sudo apt-get install nodejs
Then install npm:
sudo apt-get install npm
Then install bower:
npm install -g bower
For any of the npm package tutorial visit: https://www.npmjs.com/
Here just search the package and you can find how to install, documentation and tutorials as well.
P.S. This is just a very common solution. If your problem still exists you can try the advanced one.
If you wish to do this server side (without jquery), you can use lodash 4.3.0:
a = _.pickBy({ b: (someCondition? 5 : undefined) }, _.negate(_.isUndefined));
And this works using lodash 3.10.1
a = _.pick({ b: (someCondition? 5 : undefined) }, _.negate(_.isUndefined));
With explode function of php
$array=explode(" ",$str);
This is a quick example for you http://codepad.org/Pbg4n76i
Combining much of above here is my real practical example, selecting records based on both meterid & timestamp. I have needed this command for years. Executes really quickly.
mysqldump -uuser -ppassword main_dbo trHourly --where="MeterID =5406 AND TIMESTAMP<'2014-10-13 05:00:00'" --no-create-info --skip-extended-insert | grep '^INSERT' > 5406.sql
A static variable inside a function has a lifespan as long as your program runs. It won't be allocated every time your function is called and deallocated when your function returns.
The backslash escapes the #, interpreting it as its literal character instead of a comment character.
[update] -- Well, my own foolishness provides the answer to this one. As it turns out, I was deleting the records from myTable before running the select COUNT statement.
How did I do that and not notice? Glad you asked. I've been testing a sql unit testing platform (tsqlunit, if you're interested) and as part of one of the tests I ran a truncate table statement, then the above. After the unit test is over everything is rolled back, and records are back in myTable. That's why I got a record count outside of my tests.
Sorry everyone...thanks for your help.
Based on @Ber's answer, I suggest removing only control characters as defined in the Unicode character database categories:
import unicodedata
def filter_non_printable(s):
return ''.join(c for c in s if not unicodedata.category(c).startswith('C'))
This applies to Mac and Windows users (I use on Mac) . I've used several of the listed answers over the years and have found that FileZilla suits my needs well when editing files on a remote host that I have SSH access to. It's also quick to setup.
View/Edit
. This brings up my default editor (Sublime) but it will work with any editor you have installed.
You could try:
dict((k, bigdict[k]) for k in ('l', 'm', 'n'))
... or in Python 3 Python versions 2.7 or later (thanks to Fábio Diniz for pointing that out that it works in 2.7 too):
{k: bigdict[k] for k in ('l', 'm', 'n')}
Update: As Håvard S points out, I'm assuming that you know the keys are going to be in the dictionary - see his answer if you aren't able to make that assumption. Alternatively, as timbo points out in the comments, if you want a key that's missing in bigdict
to map to None
, you can do:
{k: bigdict.get(k, None) for k in ('l', 'm', 'n')}
If you're using Python 3, and you only want keys in the new dict that actually exist in the original one, you can use the fact to view objects implement some set operations:
{k: bigdict[k] for k in bigdict.keys() & {'l', 'm', 'n'}}
Is there any reason for a class declaration to inherit from
object
?
In Python 3, apart from compatibility between Python 2 and 3, no reason. In Python 2, many reasons.
In Python 2.x (from 2.2 onwards) there's two styles of classes depending on the presence or absence of object
as a base-class:
"classic" style classes: they don't have object
as a base class:
>>> class ClassicSpam: # no base class
... pass
>>> ClassicSpam.__bases__
()
"new" style classes: they have, directly or indirectly (e.g inherit from a built-in type), object
as a base class:
>>> class NewSpam(object): # directly inherit from object
... pass
>>> NewSpam.__bases__
(<type 'object'>,)
>>> class IntSpam(int): # indirectly inherit from object...
... pass
>>> IntSpam.__bases__
(<type 'int'>,)
>>> IntSpam.__bases__[0].__bases__ # ... because int inherits from object
(<type 'object'>,)
Without a doubt, when writing a class you'll always want to go for new-style classes. The perks of doing so are numerous, to list some of them:
Support for descriptors. Specifically, the following constructs are made possible with descriptors:
classmethod
: A method that receives the class as an implicit argument instead of the instance.staticmethod
: A method that does not receive the implicit argument self
as a first argument.property
: Create functions for managing the getting, setting and deleting of an attribute. __slots__
: Saves memory consumptions of a class and also results in faster attribute access. Of course, it does impose limitations.The __new__
static method: lets you customize how new class instances are created.
Method resolution order (MRO): in what order the base classes of a class will be searched when trying to resolve which method to call.
Related to MRO, super
calls. Also see, super()
considered super.
If you don't inherit from object
, forget these. A more exhaustive description of the previous bullet points along with other perks of "new" style classes can be found here.
One of the downsides of new-style classes is that the class itself is more memory demanding. Unless you're creating many class objects, though, I doubt this would be an issue and it's a negative sinking in a sea of positives.
In Python 3, things are simplified. Only new-style classes exist (referred to plainly as classes) so, the only difference in adding object
is requiring you to type in 8 more characters. This:
class ClassicSpam:
pass
is completely equivalent (apart from their name :-) to this:
class NewSpam(object):
pass
and to this:
class Spam():
pass
All have object
in their __bases__
.
>>> [object in cls.__bases__ for cls in {Spam, NewSpam, ClassicSpam}]
[True, True, True]
In Python 2: always inherit from object
explicitly. Get the perks.
In Python 3: inherit from object
if you are writing code that tries to be Python agnostic, that is, it needs to work both in Python 2 and in Python 3. Otherwise don't, it really makes no difference since Python inserts it for you behind the scenes.
you need to wrap your text inside div and float it left while wrapper div should have height, and I've also added line height for vertical alignment
<div style="border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: gray;height:30px;">
<div style="float:left;line-height:30px;">Contact Details</div>
<button type="button" class="edit_button" style="float: right;">My Button</button>
</div>
also js fiddle here =) http://jsfiddle.net/xQgSm/
$(window).on('activate.bs.scrollspy', function (e,obj) {_x000D_
_x000D_
if ((window.innerHeight + window.pageYOffset) >= document.body.offsetHeight) {_x000D_
return;_x000D_
}_x000D_
_x000D_
var isBGLight = $(obj.relatedTarget).hasClass('nav_white');_x000D_
var isBGDark = $(obj.relatedTarget).hasClass('nav_blue');_x000D_
$('.menu').removeClass('nav_white');_x000D_
$('.menu').removeClass('nav_blue');_x000D_
if(isBGDark)_x000D_
{_x000D_
$('.menu').addClass('nav_white');_x000D_
}else if(isBGLight)_x000D_
{_x000D_
$('.menu').addClass('nav_blue');_x000D_
}_x000D_
/*var isScrolled = $(document).scrollTop() > 1;_x000D_
$('.menu').toggleClass('scrolled', isScrolled);_x000D_
$(".demos").toggleClass("demo");_x000D_
$(".demos").toggleClass("demo1");_x000D_
var posicionActual = $(document).scrollTop();_x000D_
$.each($('.nav_transparent'),function(){_x000D_
if ($(this).position().top < posicionActual){_x000D_
$("nav.menu").removeClass("nav_white");_x000D_
$("nav.menu").removeClass("nav_blue");_x000D_
$("nav.menu").addClass("nav_transparent");_x000D_
$(".demos").removeClass("demo");_x000D_
$(".demos").addClass("demo1");_x000D_
$(".cls").removeClass("cls2");_x000D_
$(".cls").addClass("cls1");_x000D_
$(".cl").removeClass("cl2");_x000D_
$(".cl").addClass("cl1");_x000D_
$(".hamb-bottom").css({"background-color": "#fff"});_x000D_
$(".hamb-middle").css({"background-color": "#fff"});_x000D_
$(".hamb-top").css({"background-color": "#fff"});_x000D_
}_x000D_
});_x000D_
$.each($('.nav_blue'),function(){_x000D_
if ($(this).position().top <= posicionActual){_x000D_
$("nav.menu").removeClass("nav_transparent");_x000D_
$("nav.menu").removeClass("nav_white");_x000D_
$("nav.menu").addClass("nav_blue");_x000D_
$(".demos").removeClass("demo1");_x000D_
$(".demos").addClass("demo");_x000D_
$(".cls").removeClass("cls2");_x000D_
$(".cls").addClass("cls1");_x000D_
$(".cl").removeClass("cl2");_x000D_
$(".cl").addClass("cl1");_x000D_
$(".hamb-bottom").css({"background-color": "#fff"});_x000D_
$(".hamb-middle").css({"background-color": "#fff"});_x000D_
$(".hamb-top").css({"background-color": "#fff"});_x000D_
}_x000D_
});_x000D_
$.each($('.nav_white'),function(){_x000D_
if ($(this).position().top <= posicionActual){_x000D_
$("nav.menu").removeClass("nav_blue");_x000D_
$("nav.menu").removeClass("nav_transparent");_x000D_
$("nav.menu").addClass("nav_white");_x000D_
$(".demos").removeClass("demo");_x000D_
$(".demos").addClass("demo1");_x000D_
$(".cls").removeClass("cls1");_x000D_
$(".cls").addClass("cls2");_x000D_
$(".cl").removeClass("cl1");_x000D_
$(".cl").addClass("cl2");_x000D_
$(".hamb-bottom").css({"background-color": "#4285f4"});_x000D_
$(".hamb-middle").css({"background-color": "#4285f4"});_x000D_
$(".hamb-top").css({"background-color": "#4285f4"});_x000D_
}_x000D_
});*/_x000D_
});_x000D_
$(window).on("scroll", function(){_x000D_
if($(document).scrollTop() < 10)_x000D_
{_x000D_
$('.nav').removeClass('nav_white');_x000D_
$('.nav').removeClass('nav_blue');_x000D_
$('.nav').removeClass('nav_transparent');_x000D_
$('.nav').addClass('nav_transparent');_x000D_
}_x000D_
});
_x000D_
the solutions, maybe
Normally speaking you'd use a DB manager application like pgAdmin, browse to the object you're interested in, and right click your way to "script as create" or similar.
Are you trying to do this... without a management app?
After discussing with the hosting of my SVN repository they gave me the following answer.
Apparently my repository is replicated to a remote repository using SVNSYNC. SVNSYNC has known limitations with enforcing locking across the replicated repositories and this is where the problem lies.
The locks were introduced by the AnkhSVN plugin in Visual Studio.
As the locks appears to be on the remote repository this explains why I can't actually see them using SVN commands.
The locks are being removed via the hosting company and hopefully all will soon be well again.
String id = UUID.randomUUID().toString();
See Android Developer blog article for using UUID class to get uuid
Use cell magic and this project on github by Phillip Cloud:
Load it by putting this at the top of your notebook or put it in your config file if you always want to load it by default:
%install_ext https://raw.github.com/cpcloud/ipython-autotime/master/autotime.py
%load_ext autotime
If loaded, every output of subsequent cell execution will include the time in min and sec it took to execute it.
Webview in Activity,Below code worked for me , Finish the activity the after load the Url in webview.in onbackpressed it go to the previous activity
webView = (WebView) findViewById(R.id.info_webView);
webView.loadUrl(value);
finish();
Modules go in site-packages
and executables go in your system's executable path. For your environment, this path is /usr/local/bin/
.
To avoid having to deal with this, simply use easy_install
, distribute
or pip
. These tools know which files need to go where.
SELECT
DB.name,
SUM(CASE WHEN type = 0 THEN MF.size * 8 / 1024 ELSE 0 END) AS DataFileSizeMB,
SUM(CASE WHEN type = 1 THEN MF.size * 8 / 1024 ELSE 0 END) AS LogFileSizeMB
FROM
sys.master_files MF
JOIN sys.databases DB ON DB.database_id = MF.database_id
GROUP BY DB.name
ORDER BY DataFileSizeMB DESC
The data from the request (content, inputs, files, querystring values) is all on this object HttpContext.Current.Request
To read the posted content
StreamReader reader = new StreamReader(HttpContext.Current.Request.InputStream);
string requestFromPost = reader.ReadToEnd();
To navigate through the all inputs
foreach (string key in HttpContext.Current.Request.Form.AllKeys)
{
string value = HttpContext.Current.Request.Form[key];
}
Like this :
imageCreateFromPNG($var);
//I don't know where from you get your image, here it's in the png case
// and then :
list($width, $height) = getimagesize($image);
echo $width;
echo $height;
Set a value to 'name' property in initial state.
this.state={ name:''};
_x000D_
Self invoking anonymous function (SIAF)
Self-invoking functions runs instantly, even if DOM isn't completely ready.
SOAP brings it’s own protocol and focuses on exposing pieces of application logic (not data) as services. SOAP exposes operations. SOAP is focused on accessing named operations, each implement some business logic through different interfaces.
Though SOAP is commonly referred to as “web services” this is a misnomer. SOAP has very little if anything to do with the Web. REST provides true “Web services” based on URIs and HTTP.
By way of illustration here are few calls and their appropriate home with commentary.
getUser(User);
This is a rest operation as you are accessing a resource (data).
switchCategory(User, OldCategory, NewCategory)
REST permits many different data formats where as SOAP only permits XML. While this may seem like it adds complexity to REST because you need to handle multiple formats, in my experience it has actually been quite beneficial. JSON usually is a better fit for data and parses much faster. REST allows better support for browser clients due to it’s support for JSON.
oldDate
is not in the format of the SimpleDateFormat
you are using to parse it.
Try this format: dd-MMM-yyyy
- It matches what you're trying to parse.
The functions with an s
take string parameters. The others take file
streams.
This should give you the conversion dp to pixels:
public static int dpToPx(int dp)
{
return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
}
This should give you the conversion pixels to dp:
public static int pxToDp(int px)
{
return (int) (px / Resources.getSystem().getDisplayMetrics().density);
}
if a.Correct
is a bool
flag for the correct answer then you need.
Answer answer = Answers.Single(a => a.Correct);
Use the "form" attribute, if you want to save your markup:
<form method="GET" id="my_form"></form>
<table>
<tr>
<td>
<input type="text" name="company" form="my_form" />
<button type="button" form="my_form">ok</button>
</td>
</tr>
</table>
(*Form fields outside of the < form > tag)
"How to attach url link to an image?"
You do it like this:
<a href="http://www.google.com"><img src="http://www.google.com/intl/en_ALL/images/logo.gif"/></a>
See it in action.
Getting one char from string at specified index
Dim pos As Integer
Dim outStr As String
pos = 2
Dim outStr As String
outStr = Left(Mid("abcdef", pos), 1)
outStr="b"
If the string has an uppercase or non-alphabetic character then the function converts all characters to lowercase and removes all non-alphabetic characters using regex finally it applies palindrome check recursively:
import re
rules = [
lambda s: any(x.isupper() for x in s),
lambda s: not s.isalpha()
]
def is_palindrome(s):
if any(rule(s) for rule in rules):
s = re.sub(r'[^\w]', '', s).lower()
if len(s) < 2:
return True
if s[0] != s[-1]:
return False
return is_palindrome(s[1:-1])
string = 'Are we not drawn onward, we few, drawn onward to new era?'
print(is_palindrome(string))
the output is True
for the input above.
The getOne
methods returns only the reference from DB (lazy loading).
So basically you are outside the transaction (the Transactional
you have been declare in service class is not considered), and the error occur.
Add .eslintrc
in the project root.
{
"globals": {
"document": true,
"foo": true,
"window": true
}
}
Here is what I learned: PYTHONPATH is a directory to add to the Python import search path "sys.path", which is made up of current dir. CWD, PYTHONPATH, standard and shared library, and customer library. For example:
% python3 -c "import sys;print(sys.path)"
['',
'/home/username/Documents/DjangoTutorial/mySite',
'/usr/lib/python3.6', '/usr/lib/python3.6/lib-dynload',
'/usr/local/lib/python3.6/dist-packages', '/usr/lib/python3/dist-packages']
where the first path '' denotes the current dir., the 2nd path is via
%export PYTHONPATH=/home/username/Documents/DjangoTutorial/mySite
which can be added to ~/.bashrc to make it permanent, and the rest are Python standard and dynamic shared library plus third-party library such as django.
As said not to mess with PYTHONHOME, even setting it to '' or 'None' will cause python3 shell to stop working:
% export PYTHONHOME=''
% python3
Fatal Python error: Py_Initialize: Unable to get the locale encoding
ModuleNotFoundError: No module named 'encodings'
Current thread 0x00007f18a44ff740 (most recent call first):
Aborted (core dumped)
Note that if you start a Python script, the CWD will be the script's directory. For example:
username@bud:~/Documents/DjangoTutorial% python3 mySite/manage.py runserver
==== Printing sys.path ====
/home/username/Documents/DjangoTutorial/mySite # CWD is where manage.py resides
/usr/lib/python3.6
/usr/lib/python3.6/lib-dynload
/usr/local/lib/python3.6/dist-packages
/usr/lib/python3/dist-packages
You can also append a path to sys.path at run-time: Suppose you have a file Fibonacci.py in ~/Documents/Python directory:
username@bud:~/Documents/DjangoTutorial% python3
>>> sys.path.append("/home/username/Documents")
>>> print(sys.path)
['', '/usr/lib/python3.6', '/usr/lib/python3.6/lib-dynload',
'/usr/local/lib/python3.6/dist-packages', '/usr/lib/python3/dist-packages',
'/home/username/Documents']
>>> from Python import Fibonacci as fibo
or via
% PYTHONPATH=/home/username/Documents:$PYTHONPATH
% python3
>>> print(sys.path)
['',
'/home/username/Documents', '/home/username/Documents/DjangoTutorial/mySite',
'/usr/lib/python3.6', '/usr/lib/python3.6/lib-dynload',
'/usr/local/lib/python3.6/dist-packages', '/usr/lib/python3/dist-packages']
>>> from Python import Fibonacci as fibo
Regular Expressions are compiled before being used when using the second version. If you are going to executing it many times it is definatly better to compile it first. If not compiling every time you match for one off's is fine.
This is the longer version of what Eliah Kagan was espousing:
while [ $(( i-- )) -gt 0 ]; do echo -n " "; done
Of course you can use printf for that as well, but not really to my liking:
printf "%$(( i*2 ))s"
This version is Dash compatible:
until [ $(( i=i-1 )) -lt 0 ]; do echo -n " "; done
with i being the initial number.
For anyone looking for a scalable solution: I wrote a small helper utility in SASS to generate responsive proportional rectangles for different breakpoints. Take a look at SASS Proportions
Hope it helps anybody!
With the recent version of nmap 6.40, it will automatically show you the MAC address. example:
nmap 192.168.0.1-255
this command will scan your network from 192.168.0.1 to 255 and will display the hosts with their MAC address on your network.
in case you want to display the mac address for a single client, use this command make sure you are on root or use "sudo"
sudo nmap -Pn 192.168.0.1
this command will display the host MAC address and the open ports.
hope that is helpful.
locals()
returns a dictionary with local names:
def func(a,b,c):
print(locals().keys())
prints the list of parameters. If you use other local variables those will be included in this list. But you could make a copy at the beginning of your function.
Just use:
mail
d 1-15
quit
Which will delete all messages between number 1 and 15. to delete all, use the d *
.
I just used this myself on ubuntu 12.04.4, and it worked like a charm.
For example:
eric@dev ~ $ mail
Heirloom Mail version 12.4 7/29/08. Type ? for help.
"/var/spool/mail/eric": 2 messages 2 new
>N 1 Cron Daemon Tue Jul 29 17:43 23/1016 "Cron <eric@ip-10-0-1-51> /usr/bin/php /var/www/sandbox/eric/c"
N 2 Cron Daemon Tue Jul 29 17:44 23/1016 "Cron <eric@ip-10-0-1-51> /usr/bin/php /var/www/sandbox/eric/c"
& d *
& quit
Then check your mail again:
eric@dev ~ $ mail
No mail for eric
eric@dev ~ $
What is tripping you up is you are using x
or exit
to quit which rolls back the changes during that session.
A difference is that "foo".equals((String)null)
returns false while "foo".compareTo((String)null) == 0
throws a NullPointerException. So they are not always interchangeable even for Strings.
How to update in codeignitor?
whenever you want to update same status with multiple rows you use where_in insteam of where or if you want to change only single record can use where.
below is my code
$conditionArray = array(1, 3, 4, 6);
$this->db->where_in("ip_id", $conditionArray);
$this->db->update($this->table, array("status" => 'active'));
its working perfect.
On Linux, you can read from /proc/sys/kernel/random/uuid
:
package main
import "io/ioutil"
import "fmt"
func main() {
u, _ := ioutil.ReadFile("/proc/sys/kernel/random/uuid")
fmt.Println(string(u))
}
No external dependencies!
$ go run uuid.go
3ee995e3-0c96-4e30-ac1e-f7f04fd03e44
I faced the same error while using pip on anaconda3 4.4.0 (python 3.6) on windows.
I fixed the problem by the following command:
easy_install pip==18.* ### installing the latest version pip
Or if lower version pip required, mention the same in the command.
Or you can try installing the lower version and then upgrading the same to latest version as follow:
easy_install pip==9.0.1
easy_install --upgrade pip
Since Marco's answer is deprecated, you must use the following syntax (according jasonlfunk's comment) :
$client = new \GuzzleHttp\Client();
$response = $client->request('POST', 'http://www.example.com/user/create', [
'form_params' => [
'email' => '[email protected]',
'name' => 'Test user',
'password' => 'testpassword',
]
]);
$response = $client->request('POST', 'http://www.example.com/files/post', [
'multipart' => [
[
'name' => 'file_name',
'contents' => fopen('/path/to/file', 'r')
],
[
'name' => 'csv_header',
'contents' => 'First Name, Last Name, Username',
'filename' => 'csv_header.csv'
]
]
]);
// PUT
$client->put('http://www.example.com/user/4', [
'body' => [
'email' => '[email protected]',
'name' => 'Test user',
'password' => 'testpassword',
],
'timeout' => 5
]);
// DELETE
$client->delete('http://www.example.com/user');
Usefull for long server operations.
$client = new \GuzzleHttp\Client();
$promise = $client->requestAsync('POST', 'http://www.example.com/user/create', [
'form_params' => [
'email' => '[email protected]',
'name' => 'Test user',
'password' => 'testpassword',
]
]);
$promise->then(
function (ResponseInterface $res) {
echo $res->getStatusCode() . "\n";
},
function (RequestException $e) {
echo $e->getMessage() . "\n";
echo $e->getRequest()->getMethod();
}
);
According to documentation, you can set headers :
// Set various headers on a request
$client->request('GET', '/get', [
'headers' => [
'User-Agent' => 'testing/1.0',
'Accept' => 'application/json',
'X-Foo' => ['Bar', 'Baz']
]
]);
If you want more details information, you can use debug
option like this :
$client = new \GuzzleHttp\Client();
$response = $client->request('POST', 'http://www.example.com/user/create', [
'form_params' => [
'email' => '[email protected]',
'name' => 'Test user',
'password' => 'testpassword',
],
// If you want more informations during request
'debug' => true
]);
Documentation is more explicits about new possibilities.
/*
If your delimiters are slash-based, escape it:
\/*
*
means "0 or more of the previous repeatable pattern", which can be a single character, a character class or a group.
With Mongoose (and Node), this worked:
User.find({ email: /^[email protected]$/i })
User.find({ email: new RegExp(
`^${emailVariable}$`, 'i') })
In MongoDB, this worked:
db.users.find({ email: { $regex: /^[email protected]$/i }})
Both lines are case-insensitive. The email in the DB could be [email protected]
and both lines will still find the object in the DB.
Likewise, we could use /^[email protected]$/i
and it would still find email: [email protected]
in the DB.
I was asked this question recently. Here's the solution I [eventually] came up with. I did it in JavaScript because it's pretty straightforward in that language.
The basic concept is that you walk the string looking for the smallest multi-character palindrome possible (either a two or three character one). Once you have that, expand the borders on both sides until it stops being a palindrome. If that length is longer than current longest one, store it and move along.
// This does the expanding bit.
function getsize(s, start, end) {
var count = 0, i, j;
for (i = start, j = end; i >= 0 && j < s.length; i--, j++) {
if (s[i] !== s[j]) {
return count;
}
count = j - i + 1; // keeps track of how big the palindrome is
}
return count;
}
function getBiggestPalindrome(s) {
// test for simple cases
if (s === null || s === '') { return 0; }
if (s.length === 1) { return 1; }
var longest = 1;
for (var i = 0; i < s.length - 1; i++) {
var c = s[i]; // the current letter
var l; // length of the palindrome
if (s[i] === s[i+1]) { // this is a 2 letter palindrome
l = getsize(s, i, i+1);
}
if (i+2 < s.length && s[i] === s[i+2]) { // 3 letter palindrome
l = getsize(s, i+1, i+1);
}
if (l > longest) { longest = l; }
}
return longest;
}
This could definitely be cleaned up and optimized a little more, but it should have pretty good performance in all but the worst case scenario (a string of the same letter).
I think you should use SO_LINGER options (with timeout 0). In this case, you connection will close immediately after closing your program; and next restart will be able to bind again.
example:
linger lin;
lin.l_onoff = 0;
lin.l_linger = 0;
setsockopt(fd, SOL_SOCKET, SO_LINGER, (const char *)&lin, sizeof(int));
see definition: http://man7.org/linux/man-pages/man7/socket.7.html
SO_LINGER
Sets or gets the SO_LINGER option. The argument is a linger
structure.
struct linger {
int l_onoff; /* linger active */
int l_linger; /* how many seconds to linger for */
};
When enabled, a close(2) or shutdown(2) will not return until
all queued messages for the socket have been successfully sent
or the linger timeout has been reached. Otherwise, the call
returns immediately and the closing is done in the background.
When the socket is closed as part of exit(2), it always
lingers in the background.
More about SO_LINGER: TCP option SO_LINGER (zero) - when it's required
Allows getting any URL on your system, not just a current one.
import org.springframework.hateoas.mvc.ControllerLinkBuilder
...
ControllerLinkBuilder linkBuilder = ControllerLinkBuilder.linkTo(methodOn(YourController.class).getSomeEntityMethod(parameterId, parameterTwoId))
URI methodUri = linkBuilder.Uri()
String methodUrl = methodUri.getPath()
First, create the new branch you would like to set as your default, for example:
$>git branch main
Next, push that branch to the origin:
$>git push origin main
Now when you login to your GitHub account, you can go to your repository and choose Settings>Default Branch and choose "main."
Then, if you so choose, you can delete the master branch:
$>git push origin :master
In general, when "Bad File Descriptor" is encountered, it means that the socket file descriptor you passed into the API is not valid, which has multiple possible reasons:
Mine was an error that popped up from BitBucket. Ran git am --skip
fixed it.
I wanted to use the top rated answer above
Object.prototype.keys = function () ...
However when using in conjunction with the google maps API v3, google maps is non-functional.
for (var key in h) ...
works well.
Why not add the interface FactoryBean to MyServiceFactory (to tell Spring that it's a factory), add a register(String service, MyService instance) then, have each of the services call:
@Autowired
MyServiceFactory serviceFactory;
@PostConstruct
public void postConstruct() {
serviceFactory.register(myName, this);
}
This way, you can separate each service provider into modules if necessary, and Spring will automagically pick up any deployed and available service providers.
If you have a package.json, you can install all the current project dependencies using:
npm install
controller_path
holds the path of the controller used to serve the current view. (ie: admin/settings
).
and
controller_name
holds the name of the controller used to serve the current view. (ie: settings
).
here's another way
import numpy as np
set(np.concatenate(df.values))
In Java 8, you can use streams:
int[] spam = new int[] { 1, 2, 3 };
Arrays.stream(spam)
.boxed()
.collect(Collectors.toList());
Here's yet another option to add to the mix:
$ du -b file.txt
That is: estimate file space usage of file.txt in bytes.
I'm a little confused about custom made completion handlers. In your example:
Say you have a download function to download a file from network,and want to be notified when download task has finished.
typealias CompletionHandler = (success:Bool) -> Void
func downloadFileFromURL(url: NSURL,completionHandler: CompletionHandler) {
// download code.
let flag = true // true if download succeed,false otherwise
completionHandler(success: flag)
}
Your // download code
will still be ran asynchronously. Why wouldn't the code go straight to your let flag = true
and completion Handler(success: flag)
without waiting for your download code to be finished?
What about a solution where the header is based on a view array :
class myViewController: UIViewController {
var header: [UILabel] = myStringArray.map { (thisTitle: String) -> UILabel in
let headerView = UILabel()
headerView.text = thisTitle
return(headerView)
}
Next in the delegate :
extension myViewController: UITableViewDelegate {
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
return(header[section])
}
}
Use window.open()
:
<a onclick="window.open(document.URL, '_blank', 'location=yes,height=570,width=520,scrollbars=yes,status=yes');">
Share Page
</a>
This will create a link titled Share Page
which opens the current url in a new window with a height of 570 and width of 520.
os.path.getsize(path)
Return the size, in bytes, of path. Raise os.error if the file does not exist or is inaccessible.
You might be launching your application from a Product file which is not linked to the plugin file. Reset your workspace and launch using the MANIFEST.MF > Overview > Testing > Launch.
You can check with null or Number.
First, add a reference to Microsoft.VisualBasic
in your application.
Then, use the following code:
bool b = Microsoft.VisualBasic.Information.IsNumeric("null");
bool c = Microsoft.VisualBasic.Information.IsNumeric("abc");
In the above, b
and c
should both be false
.
var checkJSON = function(m) {
if (typeof m == 'object') {
try{ m = JSON.stringify(m); }
catch(err) { return false; } }
if (typeof m == 'string') {
try{ m = JSON.parse(m); }
catch (err) { return false; } }
if (typeof m != 'object') { return false; }
return true;
};
checkJSON(JSON.parse('{}')); //true
checkJSON(JSON.parse('{"a":0}')); //true
checkJSON('{}'); //true
checkJSON('{"a":0}'); //true
checkJSON('x'); //false
checkJSON(''); //false
checkJSON(); //false
Another option is the janitor
package:
df <- remove_empty_cols(df)
Enable NSZombieEnabled to know which object is being released and then accessed.
Then check if the getResultSetFromDB:
has anything to do with that. Also check if docids
has anything inside and if it is being retained.
This way you can be sure there is nothing wrong.
try this:
var result = from r in myDataTable.AsEnumerable()
where r.Field<string>("Name") != "n/a" &&
r.Field<string>("Name") != "" select r;
DataTable dtResult = result.CopyToDataTable();
You can just do it like this:
#content {
position: relative;
}
#content img {
position: absolute;
top: 0px;
right: 0px;
}
<div id="content">
<img src="images/ribbon.png" class="ribbon"/>
<div>some text...</div>
</div>
As Henrik wrote you can use dblink to connect remote database and fetch result. For example:
psql dbtest
CREATE TABLE tblB (id serial, time integer);
INSERT INTO tblB (time) VALUES (5000), (2000);
psql postgres
CREATE TABLE tblA (id serial, time integer);
INSERT INTO tblA
SELECT id, time
FROM dblink('dbname=dbtest', 'SELECT id, time FROM tblB')
AS t(id integer, time integer)
WHERE time > 1000;
TABLE tblA;
id | time
----+------
1 | 5000
2 | 2000
(2 rows)
PostgreSQL has record pseudo-type (only for function's argument or result type), which allows you query data from another (unknown) table.
Edit:
You can make it as prepared statement if you want and it works as well:
PREPARE migrate_data (integer) AS
INSERT INTO tblA
SELECT id, time
FROM dblink('dbname=dbtest', 'SELECT id, time FROM tblB')
AS t(id integer, time integer)
WHERE time > $1;
EXECUTE migrate_data(1000);
-- DEALLOCATE migrate_data;
Edit (yeah, another):
I just saw your revised question (closed as duplicate, or just very similar to this).
If my understanding is correct (postgres has tbla and dbtest has tblb and you want remote insert with local select, not remote select with local insert as above):
psql dbtest
SELECT dblink_exec
(
'dbname=postgres',
'INSERT INTO tbla
SELECT id, time
FROM dblink
(
''dbname=dbtest'',
''SELECT id, time FROM tblb''
)
AS t(id integer, time integer)
WHERE time > 1000;'
);
I don't like that nested dblink, but AFAIK I can't reference to tblB in dblink_exec body. Use LIMIT to specify top 20 rows, but I think you need to sort them using ORDER BY clause first.
Simple example...
Let's say the child view controller has a UISlider
and we want to pass the value of the slider back to the parent via a delegate.
In the child view controller's header file, declare the delegate type and its methods:
ChildViewController.h
#import <UIKit/UIKit.h>
// 1. Forward declaration of ChildViewControllerDelegate - this just declares
// that a ChildViewControllerDelegate type exists so that we can use it
// later.
@protocol ChildViewControllerDelegate;
// 2. Declaration of the view controller class, as usual
@interface ChildViewController : UIViewController
// Delegate properties should always be weak references
// See http://stackoverflow.com/a/4796131/263871 for the rationale
// (Tip: If you're not using ARC, use `assign` instead of `weak`)
@property (nonatomic, weak) id<ChildViewControllerDelegate> delegate;
// A simple IBAction method that I'll associate with a close button in
// the UI. We'll call the delegate's childViewController:didChooseValue:
// method inside this handler.
- (IBAction)handleCloseButton:(id)sender;
@end
// 3. Definition of the delegate's interface
@protocol ChildViewControllerDelegate <NSObject>
- (void)childViewController:(ChildViewController*)viewController
didChooseValue:(CGFloat)value;
@end
In the child view controller's implementation, call the delegate methods as required.
ChildViewController.m
#import "ChildViewController.h"
@implementation ChildViewController
- (void)handleCloseButton:(id)sender {
// Xcode will complain if we access a weak property more than
// once here, since it could in theory be nilled between accesses
// leading to unpredictable results. So we'll start by taking
// a local, strong reference to the delegate.
id<ChildViewControllerDelegate> strongDelegate = self.delegate;
// Our delegate method is optional, so we should
// check that the delegate implements it
if ([strongDelegate respondsToSelector:@selector(childViewController:didChooseValue:)]) {
[strongDelegate childViewController:self didChooseValue:self.slider.value];
}
}
@end
In the parent view controller's header file, declare that it implements the ChildViewControllerDelegate
protocol.
RootViewController.h
#import <UIKit/UIKit.h>
#import "ChildViewController.h"
@interface RootViewController : UITableViewController <ChildViewControllerDelegate>
@end
In the parent view controller's implementation, implement the delegate methods appropriately.
RootViewController.m
#import "RootViewController.h"
@implementation RootViewController
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
ChildViewController *detailViewController = [[ChildViewController alloc] init];
// Assign self as the delegate for the child view controller
detailViewController.delegate = self;
[self.navigationController pushViewController:detailViewController animated:YES];
}
// Implement the delegate methods for ChildViewControllerDelegate
- (void)childViewController:(ChildViewController *)viewController didChooseValue:(CGFloat)value {
// Do something with value...
// ...then dismiss the child view controller
[self.navigationController popViewControllerAnimated:YES];
}
@end
Hope this helps!
There is an alternative solution that might be adaptable to the RichTextBox oultined in this blog post - it used a trigger to swap out the control template when the use hovers over the control - should help with performance
.pyc
contain the compiled bytecode of Python source files. The Python interpreter loads .pyc
files before .py
files, so if they're present, it can save some time by not having to re-compile the Python source code. You can get rid of them if you want, but they don't cause problems, they're not big, and they may save some time when running programs.
It depends on what you want to do.
Case # 1: Save the model to use it yourself for inference: You save the model, you restore it, and then you change the model to evaluation mode. This is done because you usually have BatchNorm
and Dropout
layers that by default are in train mode on construction:
torch.save(model.state_dict(), filepath)
#Later to restore:
model.load_state_dict(torch.load(filepath))
model.eval()
Case # 2: Save model to resume training later: If you need to keep training the model that you are about to save, you need to save more than just the model. You also need to save the state of the optimizer, epochs, score, etc. You would do it like this:
state = {
'epoch': epoch,
'state_dict': model.state_dict(),
'optimizer': optimizer.state_dict(),
...
}
torch.save(state, filepath)
To resume training you would do things like: state = torch.load(filepath)
, and then, to restore the state of each individual object, something like this:
model.load_state_dict(state['state_dict'])
optimizer.load_state_dict(state['optimizer'])
Since you are resuming training, DO NOT call model.eval()
once you restore the states when loading.
Case # 3: Model to be used by someone else with no access to your code:
In Tensorflow you can create a .pb
file that defines both the architecture and the weights of the model. This is very handy, specially when using Tensorflow serve
. The equivalent way to do this in Pytorch would be:
torch.save(model, filepath)
# Then later:
model = torch.load(filepath)
This way is still not bullet proof and since pytorch is still undergoing a lot of changes, I wouldn't recommend it.
If you write Perl with use strict;
, then you'll find that the one line syntax isn't valid, even when declared.
With:
my ($newstring = $oldstring) =~ s/foo/bar/;
You get:
Can't declare scalar assignment in "my" at script.pl line 7, near ") =~"
Execution of script.pl aborted due to compilation errors.
Instead, the syntax that you have been using, while a line longer, is the syntactically correct way to do it with use strict;
. For me, using use strict;
is just a habit now. I do it automatically. Everyone should.
#!/usr/bin/env perl -wT
use strict;
my $oldstring = "foo one foo two foo three";
my $newstring = $oldstring;
$newstring =~ s/foo/bar/g;
print "$oldstring","\n";
print "$newstring","\n";
The below code also works fine for Select2 3.x
For Enable Select Box:
$('#foo').select2('enable');
For Disable Select Box:
$('#foo').select2('disable');
jsfiddle: http://jsfiddle.net/DcunN/
Step 1 - Install package
# yum install MySQL-python
Loaded plugins: auto-update-debuginfo, langpacks, presto, refresh-packagekit
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package MySQL-python.i686 0:1.2.3-3.fc15 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
MySQL-python i686 1.2.3-3.fc15 fedora 78 k
Transaction Summary
================================================================================
Install 1 Package(s)
Total download size: 78 k
Installed size: 220 k
Is this ok [y/N]: y
Downloading Packages:
Setting up and reading Presto delta metadata
Processing delta metadata
Package(s) data still to download: 78 k
MySQL-python-1.2.3-3.fc15.i686.rpm | 78 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : MySQL-python-1.2.3-3.fc15.i686 1/1
Installed:
MySQL-python.i686 0:1.2.3-3.fc15
Complete!
Step 2 - Test working
import MySQLdb
db = MySQLdb.connect("localhost","myusername","mypassword","mydb" )
cursor = db.cursor()
cursor.execute("SELECT VERSION()")
data = cursor.fetchone()
print "Database version : %s " % data
db.close()
Ouput:
Database version : 5.5.20
Just access the element and append it to the value.
<input
type="button"
onclick="document.getElementById('myTextArea').value += '•'"
value="Add •">
See a live demo.
For the sake of keeping things simple, I haven't written unobtrusive JS. For a production system you should.
Also it needs to be a UTF8 character.
Browsers generally submit forms using the encoding they received the page in. Serve your page as UTF-8 if you want UTF-8 data submitted back.
The default vector constructor will create an empty vector. As such, you should be able to write:
struct user r = { string(), vector<unsigned char>() };
Note, I've also used the default string constructor instead of "".
You might want to consider making user a class and adding a default constructor that does this for you:
class User {
User() {}
string username;
vector<unsigned char> password;
};
Then just writing:
User r;
Will result in a correctly initialized user.
In addition to all the registry keys mentioned above, you may also have to look at HKEY_CURRENT_USER\Software\Microsoft\Installer\Products for programs installed just for the current user.
There are errors in your meta tag.
Yours:
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src: 'self' 'unsafe-inline' 'unsafe-eval'>
Corrected:
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'"/>
Note the colon after "script-src", and the end double-quote of the meta tag.
One advantage your current approach does have is that it will raise an error if multiple rows are returned by the predicate. To reproduce that you can use.
SELECT @currentTerm = currentterm,
@termID = termid,
@endDate = enddate
FROM table1
WHERE iscurrent = 1
IF( @@ROWCOUNT <> 1 )
BEGIN
RAISERROR ('Unexpected number of matching rows',
16,
1)
RETURN
END
You don't need use so many prefixes for full use, because if you choose prefix for old firefox, you don't need use prefix for new firefox.
So for full use, enough use this code:
img.grayscale {
filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); /* Firefox 10+, Firefox on Android */
filter: gray; /* IE6-9 */
-webkit-filter: grayscale(100%); /* Chrome 19+, Safari 6+, Safari 6+ iOS */
}
img.grayscale.disabled {
filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'1 0 0 0 0, 0 1 0 0 0, 0 0 1 0 0, 0 0 0 1 0\'/></filter></svg>#grayscale");
filter: none;
-webkit-filter: grayscale(0%);
}
The best is QSpinBox
.
And for a double value use QDoubleSpinBox
.
QSpinBox myInt;
myInt.setMinimum(-5);
myInt.setMaximum(5);
myInt.setSingleStep(1);// Will increment the current value with 1 (if you use up arrow key) (if you use down arrow key => -1)
myInt.setValue(2);// Default/begining value
myInt.value();// Get the current value
//connect(&myInt, SIGNAL(valueChanged(int)), this, SLOT(myValueChanged(int)));
Installing webpack with -g option installs webpack in a folder in
C:\Users\<.profileusername.>\AppData\Roaming\npm\node_modules
same with webpack-cli and webpack-dev-server
Outside the global node_modules a link is created for webpack to be run from commandline
C:\Users\<.profileusername.>\AppData\Roaming\npm
to make this work locally, I did the following
Problem with this approach is you'd have to maintain links for each project you have. Theres no other way since you are using the command line editor to run webpack command when installing with a -g option.
So if you had proj1, proj2 and proj3 all with their local node_modules and local webpack installed( not using -g when installing), then you'd have to create non-generic link names instead of just webpack.
example here would be to create webpack_proj1.cmd, webpack_proj2.cmd and webpack_proj3.cmd and in each cmd follow point 2 and 3 above
PS: dont forget to update your package.json with these changes or else you'll get errors as it won't find webpack command
I needed to download and install the Windows 8.0 (and not 8.1) SDK to make the error disappear on my TeamCity server.
https://developer.microsoft.com/en-us/windows/downloads/windows-8-sdk
Quick answer:
A child scope normally prototypically inherits from its parent scope, but not always. One exception to this rule is a directive with scope: { ... }
-- this creates an "isolate" scope that does not prototypically inherit. This construct is often used when creating a "reusable component" directive.
As for the nuances, scope inheritance is normally straightfoward... until you need 2-way data binding (i.e., form elements, ng-model) in the child scope. Ng-repeat, ng-switch, and ng-include can trip you up if you try to bind to a primitive (e.g., number, string, boolean) in the parent scope from inside the child scope. It doesn't work the way most people expect it should work. The child scope gets its own property that hides/shadows the parent property of the same name. Your workarounds are
New AngularJS developers often do not realize that ng-repeat
, ng-switch
, ng-view
, ng-include
and ng-if
all create new child scopes, so the problem often shows up when these directives are involved. (See this example for a quick illustration of the problem.)
This issue with primitives can be easily avoided by following the "best practice" of always have a '.' in your ng-models – watch 3 minutes worth. Misko demonstrates the primitive binding issue with ng-switch
.
Having a '.' in your models will ensure that prototypal inheritance is in play. So, use
<input type="text" ng-model="someObj.prop1">
<!--rather than
<input type="text" ng-model="prop1">`
-->
Also placed on the AngularJS wiki: https://github.com/angular/angular.js/wiki/Understanding-Scopes
It is important to first have a solid understanding of prototypal inheritance, especially if you are coming from a server-side background and you are more familiar with class-ical inheritance. So let's review that first.
Suppose parentScope has properties aString, aNumber, anArray, anObject, and aFunction. If childScope prototypically inherits from parentScope, we have:
(Note that to save space, I show the anArray
object as a single blue object with its three values, rather than an single blue object with three separate gray literals.)
If we try to access a property defined on the parentScope from the child scope, JavaScript will first look in the child scope, not find the property, then look in the inherited scope, and find the property. (If it didn't find the property in the parentScope, it would continue up the prototype chain... all the way up to the root scope). So, these are all true:
childScope.aString === 'parent string'
childScope.anArray[1] === 20
childScope.anObject.property1 === 'parent prop1'
childScope.aFunction() === 'parent output'
Suppose we then do this:
childScope.aString = 'child string'
The prototype chain is not consulted, and a new aString property is added to the childScope. This new property hides/shadows the parentScope property with the same name. This will become very important when we discuss ng-repeat and ng-include below.
Suppose we then do this:
childScope.anArray[1] = '22'
childScope.anObject.property1 = 'child prop1'
The prototype chain is consulted because the objects (anArray and anObject) are not found in the childScope. The objects are found in the parentScope, and the property values are updated on the original objects. No new properties are added to the childScope; no new objects are created. (Note that in JavaScript arrays and functions are also objects.)
Suppose we then do this:
childScope.anArray = [100, 555]
childScope.anObject = { name: 'Mark', country: 'USA' }
The prototype chain is not consulted, and child scope gets two new object properties that hide/shadow the parentScope object properties with the same names.
Takeaways:
One last scenario:
delete childScope.anArray
childScope.anArray[1] === 22 // true
We deleted the childScope property first, then when we try to access the property again, the prototype chain is consulted.
The contenders:
scope: true
, directive with transclude: true
.scope: { ... }
. This creates an "isolate" scope instead.Note, by default, directives do not create new scope -- i.e., the default is scope: false
.
Suppose we have in our controller:
$scope.myPrimitive = 50;
$scope.myObject = {aNumber: 11};
And in our HTML:
<script type="text/ng-template" id="/tpl1.html">
<input ng-model="myPrimitive">
</script>
<div ng-include src="'/tpl1.html'"></div>
<script type="text/ng-template" id="/tpl2.html">
<input ng-model="myObject.aNumber">
</script>
<div ng-include src="'/tpl2.html'"></div>
Each ng-include generates a new child scope, which prototypically inherits from the parent scope.
Typing (say, "77") into the first input textbox causes the child scope to get a new myPrimitive
scope property that hides/shadows the parent scope property of the same name. This is probably not what you want/expect.
Typing (say, "99") into the second input textbox does not result in a new child property. Because tpl2.html binds the model to an object property, prototypal inheritance kicks in when the ngModel looks for object myObject -- it finds it in the parent scope.
We can rewrite the first template to use $parent, if we don't want to change our model from a primitive to an object:
<input ng-model="$parent.myPrimitive">
Typing (say, "22") into this input textbox does not result in a new child property. The model is now bound to a property of the parent scope (because $parent is a child scope property that references the parent scope).
For all scopes (prototypal or not), Angular always tracks a parent-child relationship (i.e., a hierarchy), via scope properties $parent, $$childHead and $$childTail. I normally don't show these scope properties in the diagrams.
For scenarios where form elements are not involved, another solution is to define a function on the parent scope to modify the primitive. Then ensure the child always calls this function, which will be available to the child scope due to prototypal inheritance. E.g.,
// in the parent scope
$scope.setMyPrimitive = function(value) {
$scope.myPrimitive = value;
}
Here is a sample fiddle that uses this "parent function" approach. (The fiddle was written as part of this answer: https://stackoverflow.com/a/14104318/215945.)
See also https://stackoverflow.com/a/13782671/215945 and https://github.com/angular/angular.js/issues/1267.
ng-switch scope inheritance works just like ng-include. So if you need 2-way data binding to a primitive in the parent scope, use $parent, or change the model to be an object and then bind to a property of that object. This will avoid child scope hiding/shadowing of parent scope properties.
See also AngularJS, bind scope of a switch-case?
Ng-repeat works a little differently. Suppose we have in our controller:
$scope.myArrayOfPrimitives = [ 11, 22 ];
$scope.myArrayOfObjects = [{num: 101}, {num: 202}]
And in our HTML:
<ul><li ng-repeat="num in myArrayOfPrimitives">
<input ng-model="num">
</li>
<ul>
<ul><li ng-repeat="obj in myArrayOfObjects">
<input ng-model="obj.num">
</li>
<ul>
For each item/iteration, ng-repeat creates a new scope, which prototypically inherits from the parent scope, but it also assigns the item's value to a new property on the new child scope. (The name of the new property is the loop variable's name.) Here's what the Angular source code for ng-repeat actually is:
childScope = scope.$new(); // child scope prototypically inherits from parent scope
...
childScope[valueIdent] = value; // creates a new childScope property
If item is a primitive (as in myArrayOfPrimitives), essentially a copy of the value is assigned to the new child scope property. Changing the child scope property's value (i.e., using ng-model, hence child scope num
) does not change the array the parent scope references. So in the first ng-repeat above, each child scope gets a num
property that is independent of the myArrayOfPrimitives array:
This ng-repeat will not work (like you want/expect it to). Typing into the textboxes changes the values in the gray boxes, which are only visible in the child scopes. What we want is for the inputs to affect the myArrayOfPrimitives array, not a child scope primitive property. To accomplish this, we need to change the model to be an array of objects.
So, if item is an object, a reference to the original object (not a copy) is assigned to the new child scope property. Changing the child scope property's value (i.e., using ng-model, hence obj.num
) does change the object the parent scope references. So in the second ng-repeat above, we have:
(I colored one line gray just so that it is clear where it is going.)
This works as expected. Typing into the textboxes changes the values in the gray boxes, which are visible to both the child and parent scopes.
See also Difficulty with ng-model, ng-repeat, and inputs and https://stackoverflow.com/a/13782671/215945
Nesting controllers using ng-controller results in normal prototypal inheritance, just like ng-include and ng-switch, so the same techniques apply. However, "it is considered bad form for two controllers to share information via $scope inheritance" -- http://onehungrymind.com/angularjs-sticky-notes-pt-1-architecture/ A service should be used to share data between controllers instead.
(If you really want to share data via controllers scope inheritance, there is nothing you need to do. The child scope will have access to all of the parent scope properties. See also Controller load order differs when loading or navigating)
scope: false
) - the directive does not create a new scope, so there is no inheritance here. This is easy, but also dangerous because, e.g., a directive might think it is creating a new property on the scope, when in fact it is clobbering an existing property. This is not a good choice for writing directives that are intended as reusable components.scope: true
- the directive creates a new child scope that prototypically inherits from the parent scope. If more than one directive (on the same DOM element) requests a new scope, only one new child scope is created. Since we have "normal" prototypal inheritance, this is like ng-include and ng-switch, so be wary of 2-way data binding to parent scope primitives, and child scope hiding/shadowing of parent scope properties.scope: { ... }
- the directive creates a new isolate/isolated scope. It does not prototypically inherit. This is usually your best choice when creating reusable components, since the directive cannot accidentally read or modify the parent scope. However, such directives often need access to a few parent scope properties. The object hash is used to set up two-way binding (using '=') or one-way binding (using '@') between the parent scope and the isolate scope. There is also '&' to bind to parent scope expressions. So, these all create local scope properties that are derived from the parent scope.
Note that attributes are used to help set up the binding -- you can't just reference parent scope property names in the object hash, you have to use an attribute. E.g., this won't work if you want to bind to parent property parentProp
in the isolated scope: <div my-directive>
and scope: { localProp: '@parentProp' }
. An attribute must be used to specify each parent property that the directive wants to bind to: <div my-directive the-Parent-Prop=parentProp>
and scope: { localProp: '@theParentProp' }
.
__proto__
references Object.
Isolate scope's $parent references the parent scope, so although it is isolated and doesn't inherit prototypically from the parent scope, it is still a child scope.
<my-directive interpolated="{{parentProp1}}" twowayBinding="parentProp2">
and
scope: { interpolatedProp: '@interpolated', twowayBindingProp: '=twowayBinding' }
scope.someIsolateProp = "I'm isolated"
transclude: true
- the directive creates a new "transcluded" child scope, which prototypically inherits from the parent scope. The transcluded and the isolated scope (if any) are siblings -- the $parent property of each scope references the same parent scope. When a transcluded and an isolate scope both exist, isolate scope property $$nextSibling will reference the transcluded scope. I'm not aware of any nuances with the transcluded scope.
transclude: true
This fiddle has a showScope()
function that can be used to examine an isolate and transcluded scope. See the instructions in the comments in the fiddle.
There are four types of scopes:
scope: true
scope: {...}
. This one is not prototypal, but '=', '@', and '&' provide a mechanism to access parent scope properties, via attributes.transclude: true
. This one is also normal prototypal scope inheritance, but it is also a sibling of any isolate scope.For all scopes (prototypal or not), Angular always tracks a parent-child relationship (i.e., a hierarchy), via properties $parent and $$childHead and $$childTail.
Diagrams were generated with graphviz "*.dot" files, which are on github. Tim Caswell's "Learning JavaScript with Object Graphs" was the inspiration for using GraphViz for the diagrams.
I think you should mention dataType: 'json'
in ajax config and to access that value:
data[0].name
Have you tried adding the absolute directory of go to your 'path'?
export PATH=$PATH:/directory/to/go/
I managed to get the ripple effect on the cardview by :
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:clickable="true"
android:foreground="@drawable/custom_bg"/>
and for the custom_bg that you can see in above code, you have to define a xml file for both lollipop(in drawable-v21 package) and pre-lollipop(in drawable package) devices. for custom_bg in drawable-v21 package the code is:
<ripple
xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:attr/colorControlHighlight">
<item
android:id="@android:id/mask"
android:drawable="@android:color/white"/>
</ripple>
for custom_bg in the drawable package, code is:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape>
<solid android:color="@color/colorHighlight"></solid>
</shape>
</item>
<item>
<shape>
<solid android:color="@color/navigation_drawer_background"></solid>
</shape>
</item>
</selector>
so on pre-lollipop devices you will have a solid click effect and on lollipop devices you will have a ripple effect on the cardview.
Let's say we have a single byte:
0110110
Applying a single left bitshift gets us:
1101100
The leftmost zero was shifted out of the byte, and a new zero was appended to the right end of the byte.
The bits don't rollover; they are discarded. That means if you left shift 1101100 and then right shift it, you won't get the same result back.
Shifting left by N is equivalent to multiplying by 2N.
Shifting right by N is (if you are using ones' complement) is the equivalent of dividing by 2N and rounding to zero.
Bitshifting can be used for insanely fast multiplication and division, provided you are working with a power of 2. Almost all low-level graphics routines use bitshifting.
For example, way back in the olden days, we used mode 13h (320x200 256 colors) for games. In Mode 13h, the video memory was laid out sequentially per pixel. That meant to calculate the location for a pixel, you would use the following math:
memoryOffset = (row * 320) + column
Now, back in that day and age, speed was critical, so we would use bitshifts to do this operation.
However, 320 is not a power of two, so to get around this we have to find out what is a power of two that added together makes 320:
(row * 320) = (row * 256) + (row * 64)
Now we can convert that into left shifts:
(row * 320) = (row << 8) + (row << 6)
For a final result of:
memoryOffset = ((row << 8) + (row << 6)) + column
Now we get the same offset as before, except instead of an expensive multiplication operation, we use the two bitshifts...in x86 it would be something like this (note, it's been forever since I've done assembly (editor's note: corrected a couple mistakes and added a 32-bit example)):
mov ax, 320; 2 cycles
mul word [row]; 22 CPU Cycles
mov di,ax; 2 cycles
add di, [column]; 2 cycles
; di = [row]*320 + [column]
; 16-bit addressing mode limitations:
; [di] is a valid addressing mode, but [ax] isn't, otherwise we could skip the last mov
Total: 28 cycles on whatever ancient CPU had these timings.
Vrs
mov ax, [row]; 2 cycles
mov di, ax; 2
shl ax, 6; 2
shl di, 8; 2
add di, ax; 2 (320 = 256+64)
add di, [column]; 2
; di = [row]*(256+64) + [column]
12 cycles on the same ancient CPU.
Yes, we would work this hard to shave off 16 CPU cycles.
In 32 or 64-bit mode, both versions get a lot shorter and faster. Modern out-of-order execution CPUs like Intel Skylake (see http://agner.org/optimize/) have very fast hardware multiply (low latency and high throughput), so the gain is much smaller. AMD Bulldozer-family is a bit slower, especially for 64-bit multiply. On Intel CPUs, and AMD Ryzen, two shifts are slightly lower latency but more instructions than a multiply (which may lead to lower throughput):
imul edi, [row], 320 ; 3 cycle latency from [row] being ready
add edi, [column] ; 1 cycle latency (from [column] and edi being ready).
; edi = [row]*(256+64) + [column], in 4 cycles from [row] being ready.
vs.
mov edi, [row]
shl edi, 6 ; row*64. 1 cycle latency
lea edi, [edi + edi*4] ; row*(64 + 64*4). 1 cycle latency
add edi, [column] ; 1 cycle latency from edi and [column] both being ready
; edi = [row]*(256+64) + [column], in 3 cycles from [row] being ready.
Compilers will do this for you: See how GCC, Clang, and Microsoft Visual C++ all use shift+lea when optimizing return 320*row + col;
.
The most interesting thing to note here is that x86 has a shift-and-add instruction (LEA
) that can do small left shifts and add at the same time, with the performance as an add
instruction. ARM is even more powerful: one operand of any instruction can be left or right shifted for free. So scaling by a compile-time-constant that's known to be a power-of-2 can be even more efficient than a multiply.
OK, back in the modern days... something more useful now would be to use bitshifting to store two 8-bit values in a 16-bit integer. For example, in C#:
// Byte1: 11110000
// Byte2: 00001111
Int16 value = ((byte)(Byte1 >> 8) | Byte2));
// value = 000011111110000;
In C++, compilers should do this for you if you used a struct
with two 8-bit members, but in practice they don't always.
I previously had the same issue, but I realized that I didn't include the "app.js
" (the main application) inside my main page (index.html
).
So even when you include all the dependencies required by AngularJS, you might end up with that error in the console. So always make sure to include the necessary files inside your main page and you shouldn't have that issue.
Hope this helps.
Before defining abstract data types, let us considers the different view of system-defined data types. We all know that by default all primitive data types (int, float, etc.) support basic operations such as addition and subtraction. The system provides the implementations for the primitive data types. For user-defined data types, we also need to define operations. The implementation for these operations can be done when we want to actually use them. That means in general, user-defined data types are defined along with their operations.
To simplify the process of solving problems, we combine the data structures with their operations and we call this "Abstract Data Type". (ADT's).
Commonly used ADT'S include: Linked List, Stacks, Queues, Binary Tree, Dictionaries, Disjoint Sets (Union and find), Hash Tables and many others.
ADT's consist of two types:
1. Declaration of data.
2. Declaration of operation.
You need to get the content of the p tag and replace all the dolors in it with the highlighted version.
You don't even need to have jQuery for this. :-)
var cumulativeOffset = function(element) {
var top = 0, left = 0;
do {
top += element.offsetTop || 0;
left += element.offsetLeft || 0;
element = element.offsetParent;
} while(element);
return {
top: top,
left: left
};
};
(Method shamelessly stolen from PrototypeJS; code style, variable names and return value changed to protect the innocent)
Imo, the best way to parse your JSON response with GSON would be creating classes that "match" your response and then use Gson.fromJson()
method.
For example:
class Response {
Map<String, App> descriptor;
// standard getters & setters...
}
class App {
String name;
int age;
String[] messages;
// standard getters & setters...
}
Then just use:
Gson gson = new Gson();
Response response = gson.fromJson(yourJson, Response.class);
Where yourJson
can be a String
, any Reader
, a JsonReader
or a JsonElement
.
Finally, if you want to access any particular field, you just have to do:
String name = response.getDescriptor().get("app3").getName();
You can always parse the JSON manually as suggested in other answers, but personally I think this approach is clearer, more maintainable in long term and it fits better with the whole idea of JSON.
-http-proxy can be set in eclipse this way:
Is this what you are looking for:
myListBox.DataSource = MyList;
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
XAML:
<ComboBox Height="23" HorizontalAlignment="Left" Margin="19,123,0,0" Name="comboBox1" VerticalAlignment="Top" Width="33" ItemsSource="{Binding}" AllowDrop="True" AlternationCount="1">
<ComboBoxItem Content="1" Name="ComboBoxItem1" />
<ComboBoxItem Content="2" Name="ComboBoxItem2" />
<ComboBoxItem Content="3" Name="ComboBoxItem3" />
</ComboBox>
C#:
if (ComboBoxItem1.IsSelected)
{
// Your code
}
else if (ComboBoxItem2.IsSelected)
{
// Your code
}
else if(ComboBoxItem3.IsSelected)
{
// Your code
}
Use empty
(it checks both nullness and emptiness) and group the nested ternary expression by parentheses (EL is in certain implementations/versions namely somewhat problematic with nested ternary expressions). Thus, so:
styleClass="#{empty obj.validationErrorMap ? ' ' :
(obj.validationErrorMap.contains('key') ? 'highlight_field' : 'highlight_row')}"
If still in vain (I would then check JBoss EL configs), use the "normal" EL approach:
styleClass="#{empty obj.validationErrorMap ? ' ' :
(obj.validationErrorMap['key'] ne null ? 'highlight_field' : 'highlight_row')}"
Update: as per the comments, the Map
turns out to actually be a List
(please work on your naming conventions). To check if a List
contains an item the "normal" EL way, use JSTL fn:contains
(although not explicitly documented, it works for List
as well).
styleClass="#{empty obj.validationErrorMap ? ' ' :
(fn:contains(obj.validationErrorMap, 'key') ? 'highlight_field' : 'highlight_row')}"
Try using the ArrayIntList from the apache framework. It works exactly like an arraylist, except it can hold primitive int.
More details here -
Add this to the beginning of your file:
Set WshShell = WScript.CreateObject("WScript.Shell")
If WScript.Arguments.Length = 0 Then
Set ObjShell = CreateObject("Shell.Application")
ObjShell.ShellExecute "wscript.exe" _
, """" & WScript.ScriptFullName & """ RunAsAdministrator", , "runas", 1
WScript.Quit
End if
<asp:GridView ID="grd_item_list" runat="server" AutoGenerateColumns="false" Width="100%" CssClass="table table-bordered table-hover" OnRowCommand="grd_item_list_RowCommand">
<Columns>
<asp:TemplateField HeaderText="No">
<ItemTemplate>
<%# Container.DataItemIndex + 1 %>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Actions">
<ItemTemplate>
<asp:Button ID="remove_itemIndex" OnClientClick="if(confirm('Are You Sure to delete?')==true){ return true;} else{ return false;}" runat="server" class="btn btn-primary" Text="REMOVE" CommandName="REMOVE_ITEM" CommandArgument='<%# Container.DataItemIndex+1 %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
**This is the row binding event**
protected void grd_item_list_RowCommand(object sender, GridViewCommandEventArgs e) {
item_list_bind_structure();
if (ViewState["item_list"] != null)
dt = (DataTable)ViewState["item_list"];
if (e.CommandName == "REMOVE_ITEM") {
var RowNum = Convert.ToInt32(e.CommandArgument.ToString()) - 1;
DataRow dr = dt.Rows[RowNum];
dr.Delete();
}
grd_item_list.DataSource = dt;
grd_item_list.DataBind();
}
Just for future reference, if you already have a boolean column and you just want to add a default do:
ALTER TABLE users
ALTER COLUMN priv_user SET DEFAULT false;
It is safe to assume that popular handsets are WVGA800 or bigger. Although, there are a good amount of HVGA screens, they are of secondary concern.
List of android screen sizes
http://developer.android.com/guide/practices/screens_support.html
Aspect ratio calculator
routerLink
directive as used like this:
<a [routerLink]="/inbox/33/messages/44">Open Message 44</a>
is just a wrapper around imperative navigation using router
and its navigateByUrl method:
router.navigateByUrl('/inbox/33/messages/44')
as can be seen from the sources:
export class RouterLink {
...
@HostListener('click')
onClick(): boolean {
...
this.router.navigateByUrl(this.urlTree, extras);
return true;
}
So wherever you need to navigate a user to another route, just inject the router
and use navigateByUrl
method:
class MyComponent {
constructor(router: Router) {
this.router.navigateByUrl(...);
}
}
There's another method on the router that you can use - navigate:
router.navigate(['/inbox/33/messages/44'])
Using
router.navigateByUrl
is similar to changing the location bar directly–we are providing the “whole” new URL. Whereasrouter.navigate
creates a new URL by applying an array of passed-in commands, a patch, to the current URL.To see the difference clearly, imagine that the current URL is
'/inbox/11/messages/22(popup:compose)'
.With this URL, calling
router.navigateByUrl('/inbox/33/messages/44')
will result in'/inbox/33/messages/44'
. But calling it withrouter.navigate(['/inbox/33/messages/44'])
will result in'/inbox/33/messages/44(popup:compose)'
.
Read more in the official docs.
You can try this:
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 18)];
/* Create custom view to display section header... */
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 5, tableView.frame.size.width, 18)];
[label setFont:[UIFont boldSystemFontOfSize:12]];
NSString *string =[list objectAtIndex:section];
/* Section header is in 0th index... */
[label setText:string];
[view addSubview:label];
[view setBackgroundColor:[UIColor colorWithRed:166/255.0 green:177/255.0 blue:186/255.0 alpha:1.0]]; //your background color...
return view;
}
// Due to this Code ): Syntax problem.
$('.myClass', '.myOtherClass').removeClass('theclass');
According to jQuery documentation: https://api.jquery.com/multiple-selector/
When can select multiple classes in this way:
jQuery(“selector1, selector2, selectorN”) // double Commas. // IS valid.
jQuery('selector1, selector2, selectorN') // single Commas. // Is valid.
by enclosing all the selectors in a single '...' ' or double commas, "..."
So in your case the correct way to call multiple classes is:
$('.myClass', '.myOtherClass').removeClass('theclass'); // your Code // Invalid.
$('.myClass , .myOtherClass').removeClass('theclass'); // Correct Code // Is valid.
If you know the second string is part of the first:
String s1 = "/var/data/stuff/xyz.dat";
String s2 = "/var/data";
String s3 = s1.substring(s2.length());
or if you really want the period at the beginning as in your example:
String s3 = ".".concat(s1.substring(s2.length()));
App IDs cannot be removed because once allocated they need to stay alive so that another App ID doesn't accidentally collide with a previously existing App ID.
Apple should however support hiding unwanted App IDs (instead of completely deleting them) to reduce clutter.
I recently used prettytable
for rendering a nice ASCII table. It's similar to the postgres CLI output.
import pandas as pd
from prettytable import PrettyTable
data = [[1,2,3],[4,5,6],[7,8,9]]
df = pd.DataFrame(data, columns=['one', 'two', 'three'])
def generate_ascii_table(df):
x = PrettyTable()
x.field_names = df.columns.tolist()
for row in df.values:
x.add_row(row)
print(x)
return x
generate_ascii_table(df)
Output:
+-----+-----+-------+
| one | two | three |
+-----+-----+-------+
| 1 | 2 | 3 |
| 4 | 5 | 6 |
| 7 | 8 | 9 |
+-----+-----+-------+
To revisit an old thread, my issue was that one of the "AddressTo" email addresses was not valid. Removing that email address removed the error.
This will be compiled into:
React.createElement(Modal, { ...this.props, title: "Modal heading", animation: false }, child0, child1, child2, ...)
where it gives more two properties title
& animation
beyond the props
the host element has.
...
is the ES6 operator called Spread.
See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax
You are working way too hard. Your entire script should be:
if mkdir "$lockdir" 2> /dev/null; then
echo lock acquired
else
echo could not acquire lock >&2
fi
but even that is probably too verbose. I would code it:
mkdir "$lockdir" || exit 1
but the resulting error message is a bit obscure.
With regards to @CrazyJugglerDrummer second method it would be:
elementsToChange.style.cursor = "http://wiki-devel.sugarlabs.org/images/e/e2/Arrow.cur";