For more performance: A simple change is observing that after n = 3n+1, n will be even, so you can divide by 2 immediately. And n won't be 1, so you don't need to test for it. So you could save a few if statements and write:
while (n % 2 == 0) n /= 2;
if (n > 1) for (;;) {
n = (3*n + 1) / 2;
if (n % 2 == 0) {
do n /= 2; while (n % 2 == 0);
if (n == 1) break;
}
}
Here's a big win: If you look at the lowest 8 bits of n, all the steps until you divided by 2 eight times are completely determined by those eight bits. For example, if the last eight bits are 0x01, that is in binary your number is ???? 0000 0001 then the next steps are:
3n+1 -> ???? 0000 0100
/ 2 -> ???? ?000 0010
/ 2 -> ???? ??00 0001
3n+1 -> ???? ??00 0100
/ 2 -> ???? ???0 0010
/ 2 -> ???? ???? 0001
3n+1 -> ???? ???? 0100
/ 2 -> ???? ???? ?010
/ 2 -> ???? ???? ??01
3n+1 -> ???? ???? ??00
/ 2 -> ???? ???? ???0
/ 2 -> ???? ???? ????
So all these steps can be predicted, and 256k + 1 is replaced with 81k + 1. Something similar will happen for all combinations. So you can make a loop with a big switch statement:
k = n / 256;
m = n % 256;
switch (m) {
case 0: n = 1 * k + 0; break;
case 1: n = 81 * k + 1; break;
case 2: n = 81 * k + 1; break;
...
case 155: n = 729 * k + 425; break;
...
}
Run the loop until n = 128, because at that point n could become 1 with fewer than eight divisions by 2, and doing eight or more steps at a time would make you miss the point where you reach 1 for the first time. Then continue the "normal" loop - or have a table prepared that tells you how many more steps are need to reach 1.
PS. I strongly suspect Peter Cordes' suggestion would make it even faster. There will be no conditional branches at all except one, and that one will be predicted correctly except when the loop actually ends. So the code would be something like
static const unsigned int multipliers [256] = { ... }
static const unsigned int adders [256] = { ... }
while (n > 128) {
size_t lastBits = n % 256;
n = (n >> 8) * multipliers [lastBits] + adders [lastBits];
}
In practice, you would measure whether processing the last 9, 10, 11, 12 bits of n at a time would be faster. For each bit, the number of entries in the table would double, and I excect a slowdown when the tables don't fit into L1 cache anymore.
PPS. If you need the number of operations: In each iteration we do exactly eight divisions by two, and a variable number of (3n + 1) operations, so an obvious method to count the operations would be another array. But we can actually calculate the number of steps (based on number of iterations of the loop).
We could redefine the problem slightly: Replace n with (3n + 1) / 2 if odd, and replace n with n / 2 if even. Then every iteration will do exactly 8 steps, but you could consider that cheating :-) So assume there were r operations n <- 3n+1 and s operations n <- n/2. The result will be quite exactly n' = n * 3^r / 2^s, because n <- 3n+1 means n <- 3n * (1 + 1/3n). Taking the logarithm we find r = (s + log2 (n' / n)) / log2 (3).
If we do the loop until n = 1,000,000 and have a precomputed table how many iterations are needed from any start point n = 1,000,000 then calculating r as above, rounded to the nearest integer, will give the right result unless s is truly large.
To answer your question, the current method would be to create the object then call the method:
$functions = new Functions();
$var = $functions->filter($_GET['params']);
Another way would be to make the method static
since the class has no private data to rely on:
public static function filter($data){
This can then be called like so:
$var = Functions::filter($_GET['params']);
Lastly, you do not need a class and can just have a file of functions which you include. So you remove the class Functions
and the public
in the method. This can then be called like you tried:
$var = filter($_GET['params']);
Try this.
Here is the service part.
[ServiceContract]
public interface IService
{
[OperationContract]
void HelloWorld();
}
public class Service : IService
{
public void HelloWorld()
{
//Hello World
}
}
Here is the Proxy
public class ServiceProxy : ClientBase<IService>
{
public ServiceProxy()
: base(new ServiceEndpoint(ContractDescription.GetContract(typeof(IService)),
new NetNamedPipeBinding(), new EndpointAddress("net.pipe://localhost/MyAppNameThatNobodyElseWillUse/helloservice")))
{
}
public void InvokeHelloWorld()
{
Channel.HelloWorld();
}
}
And here is the service hosting part.
var serviceHost = new ServiceHost
(typeof(Service), new Uri[] { new Uri("net.pipe://localhost/MyAppNameThatNobodyElseWillUse") });
serviceHost.AddServiceEndpoint(typeof(IService), new NetNamedPipeBinding(), "helloservice");
serviceHost.Open();
Console.WriteLine("Service started. Available in following endpoints");
foreach (var serviceEndpoint in serviceHost.Description.Endpoints)
{
Console.WriteLine(serviceEndpoint.ListenUri.AbsoluteUri);
}
First of all, sha256 is a hashing algorithm, not a type of encryption. An encryption would require having a way to decrypt the information back to its original value (collisions aside).
Looking at your code, it seems it should work if you are providing the correct parameter.
Try using a literal string in your code first, and verify its validity instead of using the $_POST[]
variable
Try moving the comparison from the database query to the code (get the hash for the given user and compare to the hash you have just calculated)
But most importantly before deploying this in any kind of public fashion, please remember to sanitize your inputs. Don't allow arbitrary SQL to be insert into the queries. The best idea here would be to use parameterized queries.
I think previous responses defined very well what MixIns are. However, in order to better understand them, it might be useful to compare MixIns with Abstract Classes and Interfaces from the code/implementation perspective:
1. Abstract Class
Class that needs to contain one or more abstract methods
Abstract Class can contain state (instance variables) and non-abstract methods
2. Interface
3. MixIns
In e.g. Python these are just conventions, because all of the above are defined as class
es. However, the common feature of both Abstract Classes, Interfaces and MixIns is that they should not exist on their own, i.e. should not be instantiated.
======================== =============== MY SOLUTION ============================ (rename your php.ini to php5.ini)
and in the top (!), add these:
magic_quotes_gpc = Off
magic_quotes_runtime = Off
magic_quotes_sybase = Off
extension=pdo.so
extension=pdo_mysql.so
then in .htaccess, add this (in the top):
SetEnv PHPRC /home/your_path/to/public_html/php5.ini
p.s. change /home/your_path/to/
correctly (you can see that path by executing the <?php phpinfo(); ?>
command from a typical .php file.)
"Case" can return single value only, but you can use complex type:
create type foo as (a int, b text);
select (case 1 when 1 then (1,'qq')::foo else (2,'ww')::foo end).*;
We've had similar problem and it was not enough to only remove commit and force push to GitLab.
It was still available in GitLab interface using url:
https://gitlab.example.com/<group>/<project>/commit/<commit hash>
We've had to remove project from GitLab and recreate it to get rid of this commit in GitLab UI.
I had the same issue when I used a DockerFile. My Docker is based on the php:5.5-apache image.
I got that error when executing the command "RUN docker-php-ext-install soap"
I have solved it by adding the following command to my DockerFile
"RUN apt-get update && apt-get install -y libxml2-dev"
Starting from pandas 0.14 (released end of May 2014), postgresql is supported. The sql
module now uses sqlalchemy
to support different database flavors. You can pass a sqlalchemy engine for a postgresql database (see docs). E.g.:
from sqlalchemy import create_engine
engine = create_engine('postgresql://username:password@localhost:5432/mydatabase')
df.to_sql('table_name', engine)
You are correct that in pandas up to version 0.13.1 postgresql was not supported. If you need to use an older version of pandas, here is a patched version of pandas.io.sql
: https://gist.github.com/jorisvandenbossche/10841234.
I wrote this a time ago, so cannot fully guarantee that it always works, buth the basis should be there). If you put that file in your working directory and import it, then you should be able to do (where con
is a postgresql connection):
import sql # the patched version (file is named sql.py)
sql.write_frame(df, 'table_name', con, flavor='postgresql')
To answer the original question: yes, you can access the index value of a row in apply()
. It is available under the key name
and requires that you specify axis=1
(because the lambda processes the columns of a row and not the rows of a column).
Working example (pandas 0.23.4):
>>> import pandas as pd
>>> df = pd.DataFrame([[1,2,3],[4,5,6]], columns=['a','b','c'])
>>> df.set_index('a', inplace=True)
>>> df
b c
a
1 2 3
4 5 6
>>> df['index_x10'] = df.apply(lambda row: 10*row.name, axis=1)
>>> df
b c index_x10
a
1 2 3 10
4 5 6 40
Its more likely that the path to file.js from the page is what is wrong. as long as when you view the page, and view-source you see the tag, its working, now its time to debug whether or not your path is too relative, maybe you need a / in front of it.
Dirk Eddelbuettel's answer is the best; here I just note that you can get away with not pre-specifying the dataframe dimensions or data types, which is sometimes useful if you have multiple data types and lots of columns:
row1<-list("a",1,FALSE) #use 'list', not 'c' or 'cbind'!
row2<-list("b",2,TRUE)
df<-data.frame(row1,stringsAsFactors = F) #first row
df<-rbind(df,row2) #now this works as you'd expect.
Every object has an internal property, [[Prototype]], linking it to another object:
object [[Prototype]] ? anotherObject
In traditional javascript, the linked object is the prototype
property of a function:
object [[Prototype]] ? aFunction.prototype
Some environments expose [[Prototype]] as __proto__
:
anObject.__proto__ === anotherObject
You create the [[Prototype]] link when creating an object.
// (1) Object.create:
var object = Object.create(anotherObject)
// object.__proto__ = anotherObject
// (2) ES6 object initializer:
var object = { __proto__: anotherObject };
// object.__proto__ = anotherObject
// (3) Traditional JavaScript:
var object = new aFunction;
// object.__proto__ = aFunction.prototype
So these statements are equivalent:
var object = Object.create(Object.prototype);
var object = { __proto__: Object.prototype }; // ES6 only
var object = new Object;
You can't actually see the link target (Object.prototype
) in a new statement; instead the target is implied by the constructor (Object
).
Remember:
prototype
property, initially holding an empty object.prototype
property of their constructor.prototype
property will go unused.new
.Here's a different approach. The heart of it was created by turning on the Macro Recorder and filtering the columns per your specifications. Then there's a bit of code to copy the results. It will run faster than looping through each row and column:
Sub FilterAndCopy()
Dim LastRow As Long
Sheets("Sheet2").UsedRange.Offset(0).ClearContents
With Worksheets("Sheet1")
.Range("$A:$E").AutoFilter
.Range("$A:$E").AutoFilter field:=1, Criteria1:="#N/A"
.Range("$A:$E").AutoFilter field:=2, Criteria1:="=String1", Operator:=xlOr, Criteria2:="=string2"
.Range("$A:$E").AutoFilter field:=3, Criteria1:=">0"
.Range("$A:$E").AutoFilter field:=5, Criteria1:="Number"
LastRow = .Range("A" & .Rows.Count).End(xlUp).Row
.Range("A1:A" & LastRow).SpecialCells(xlCellTypeVisible).EntireRow.Copy _
Destination:=Sheets("Sheet2").Range("A1")
End With
End Sub
As a side note, your code has more loops and counter variables than necessary. You wouldn't need to loop through the columns, just through the rows. You'd then check the various cells of interest in that row, much like you did.
To expand on Ryan's answer, when you are declaring variables (using Dim) you can cheat a little bit by using the predictive text feature in the VBE, as in the image below.
If it shows up in that list, then you can assign an object of that type to a variable. So not just a Worksheet, as Ryan pointed out, but also a Chart, Range, Workbook, Series and on and on.
You set that variable equal to the object you want to manipulate and then you can call methods, pass it to functions, etc, just like Ryan pointed out for this example. You might run into a couple snags when it comes to collections vs objects (Chart or Charts, Range or Ranges, etc) but with trial and error you'll get it for sure.
If you are using SQL Server Management Studio then do as follows:
Enjoy.
I come across a situation where i need to insert the data in the database & simultaneously require the primary id using entity framework. Solution :
long id;
IGenericQueryRepository<myentityclass, Entityname> InfoBase = null;
try
{
InfoBase = new GenericQueryRepository<myentityclass, Entityname>();
InfoBase.Add(generalinfo);
InfoBase.Context.SaveChanges();
id = entityclassobj.ID;
return id;
}
Building and simplifying @kindall's answer, here's what I typically use:
v_print = None
def main()
parser = argparse.ArgumentParser()
parser.add_argument('-v', '--verbosity', action="count",
help="increase output verbosity (e.g., -vv is more than -v)")
args = parser.parse_args()
if args.verbosity:
def _v_print(*verb_args):
if verb_args[0] > (3 - args.verbosity):
print verb_args[1]
else:
_v_print = lambda *a: None # do-nothing function
global v_print
v_print = _v_print
if __name__ == '__main__':
main()
This then provides the following usage throughout your script:
v_print(1, "INFO message")
v_print(2, "WARN message")
v_print(3, "ERROR message")
And your script can be called like this:
% python verbose-tester.py -v
ERROR message
% python verbose=tester.py -vv
WARN message
ERROR message
% python verbose-tester.py -vvv
INFO message
WARN message
ERROR message
A couple notes:
3
that sets the upper bound for your logging, but I accept that as a compromise for simplicity.v_print
to work throughout your program, you have to do the junk with the global. It's no fun, but I challenge somebody to find a better way.#include <iostream>
#include <vector>
#include <algorithm> // std::min_element
#include <iterator> // std::begin, std::end
int main() {
std::vector<int> v = {5,14,2,4,6};
auto result = std::min_element(std::begin(v), std::end(v));
if (std::end(v)!=result)
std::cout << *result << '\n';
}
The program you show has a few problems, the primary culprit being the for
condition: i<v[n]
. You initialize the array, setting the first 5 elements to various values and the rest to zero. n
is set to the number of elements you explicitly initialized so v[n]
is the first element that was implicitly initialized to zero. Therefore the loop condition is false the first time around and the loop does not run at all; your code simply prints out the first element.
Some minor issues:
avoid raw arrays; they behave strangely and inconsistently (e.g., implicit conversion to pointer to the array's first element, can't be assigned, can't be passed to/returned from functions by value)
avoid magic numbers. int v[100]
is an invitation to a bug if you want your array to get input from somewhere and then try to handle more than 100 elements.
avoid using namespace std;
It's not a big deal in implementation files, although IMO it's better to just get used to explicit qualification, but it can cause problems if you blindly use it everywhere because you'll put it in header files and start causing unnecessary name conflicts.
A function returns a value and a procedure just executes commands.
The name function comes from math. It is used to calculate a value based on input.
A procedure is a set of commands which can be executed in order.
In most programming languages, even functions can have a set of commands. Hence the difference is only returning a value.
But if you like to keep a function clean, (just look at functional languages), you need to make sure a function does not have a side effect.
Run ps aux | grep nodejs
, find the PID of the process you're looking for, then run kill
starting with SIGTERM (kill -15 25239
). If that doesn't work then use SIGKILL instead, replacing -15
with -9
.
This really saved my day.
I have written a extension method based on Zach's answer, also I have extended it to use the encoding as a parameter, allowing for different encodings beside from UTF-8 to be used, and I wrapped the MemoryStream in a 'using' statement.
public static class XmlHelperExtentions
{
/// <summary>
/// Loads a string through .Load() instead of .LoadXml()
/// This prevents character encoding problems.
/// </summary>
/// <param name="xmlDocument"></param>
/// <param name="xmlString"></param>
public static void LoadString(this XmlDocument xmlDocument, string xmlString, Encoding encoding = null) {
if (encoding == null) {
encoding = Encoding.UTF8;
}
// Encode the XML string in a byte array
byte[] encodedString = encoding.GetBytes(xmlString);
// Put the byte array into a stream and rewind it to the beginning
using (var ms = new MemoryStream(encodedString)) {
ms.Flush();
ms.Position = 0;
// Build the XmlDocument from the MemorySteam of UTF-8 encoded bytes
xmlDocument.Load(ms);
}
}
}
In Internet Explorer, parentElement
is undefined for SVG elements, whereas parentNode
is defined.
The OP needed to cast as string outside the {% set ... %}
.
But if that not your case you can do:
{% set curYear = 2013 | string() %}
Note that you need the parenthesis on that jinja filter.
If you're concatenating 2 variables, you can also use the ~
custom operator.
Create a .c file containing just the line:
_MSC_VER
or
CompilerVersion=_MSC_VER
then pre-process with
cl /nologo /EP <filename>.c
It is easy to parse the output.
Properties have the primary advantage of allowing you to change the way data on an object is accessed without breaking it's public interface. For example, if you need to add extra validation, or to change a stored field into a calculated you can do so easily if you initially exposed the field as a property. If you just exposed a field directly, then you would have to change the public interface of your class to add the new functionality. That change would break existing clients, requiring them to be recompiled before they could use the new version of your code.
If you write a class library designed for wide consumption (like the .NET Framework, which is used by millions of people), that can be a problem. However, if you are writing a class used internally inside a small code base (say <= 50 K lines), it's really not a big deal, because no one would be adversely affected by your changes. In that case it really just comes down to personal preference.
Use the map
method:
var a = [1, 2, 3]_x000D_
var b = ['a', 'b', 'c']_x000D_
_x000D_
var c = a.map(function(e, i) {_x000D_
return [e, b[i]];_x000D_
});_x000D_
_x000D_
console.log(c)
_x000D_
How about this?
enum class ErrorCodes : int{
InvalidInput = 0
};
std::cout << ((int)error == 0 ? "InvalidInput" : "") << std::endl;
etc... I know this is a highly contrived example but I think it has application where applicable and needed and is certainly shorter than writing a script for it.
You can't disable a textbox in CSS. Disabling it is not a presentational task, you will have to do this in the HTML markup using the disabled
attribute.
You may be able to put something together by putting the textbox underneath an absolutely positioned transparent element with z-index... But that's just silly, plus you would need a second HTML element anyway.
You can, however, style disabled text boxes (if that's what you mean) in CSS using
input[disabled] { ... }
from IE7 upwards and in all other major browsers.
Some addition to previous comments: 'firstboot' won't be available until you run 'mount_root' command.
So here is a full recap of what needs to be done. All manipulations I did on Windows 8.1.
netsh interface ip set address name="Ethernet" static 192.168.1.2 255.255.255.0 192.168.1.1
Now you can enter to the router console from a browser. Also don't forget to return your PC from static to DHCP address assignment. Example: netsh interface ip set address name="Ethernet" source=dhcp
Adding this to your WebSecurityConfiguration class should do the trick.
@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
@Override
public void configure(WebSecurity web) throws Exception {
web.ignoring().antMatchers("/v2/api-docs",
"/configuration/ui",
"/swagger-resources/**",
"/configuration/security",
"/swagger-ui.html",
"/webjars/**");
}
}
I've done this before successfully - I have some code at home. When I get home tonight, I'll update this answer with the working code of a service launching a console app.
I thought I'd try this from scratch. Here's some code I wrote that launches a console app. I installed it as a service and ran it and it worked properly: cmd.exe launches (as seen in Task Manager) and lives for 10 seconds until I send it the exit command. I hope this helps your situation as it does work properly as expected here.
using (System.Diagnostics.Process process = new System.Diagnostics.Process())
{
process.StartInfo = new System.Diagnostics.ProcessStartInfo(@"c:\windows\system32\cmd.exe");
process.StartInfo.CreateNoWindow = true;
process.StartInfo.ErrorDialog = false;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.UseShellExecute = false;
process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
process.Start();
//// do some other things while you wait...
System.Threading.Thread.Sleep(10000); // simulate doing other things...
process.StandardInput.WriteLine("exit"); // tell console to exit
if (!process.HasExited)
{
process.WaitForExit(120000); // give 2 minutes for process to finish
if (!process.HasExited)
{
process.Kill(); // took too long, kill it off
}
}
}
Let's use this example. Maybe you want the user of your website to know a field is valid or it needs attention by changing the background color of the field. If the user hits reset then your code should only reset the fields that have data and not bother to loop through every other field on your page.
This jQuery filter will remove the class "highlightCriteria" only for the input or select fields that have this class.
$form.find('input,select').filter(function () {
if((!!this.value) && (!!this.name)) {
$("#"+this.id).removeClass("highlightCriteria");
}
});
As the docs say, this can be achieved just by using set
instead if push
.
As the docs say, it is not recommended (due to possible overwrite by other user at the "same" time).
But in some cases it's helpful to have control over the feed's content including keys.
As an example of webapp in js, 193 being your id generated elsewhere, simply:
firebase.initializeApp(firebaseConfig);
var data={
"name":"Prague"
};
firebase.database().ref().child('areas').child("193").set(data);
This will overwrite any area labeled 193 or create one if it's not existing yet.
sys.executable is not reliable if working in an embedded python environment. My suggestions is to deduce it from
import os
os.__file__
I got similar error (my app crashes) after I renamed something in strings.xml
and forgot to modify other files (a preference xml resource file and java code).
IDE (android studio) didn't showed any errors. But, after I repaired my xml files and java code, app ran okay. So, maybe there are some small mistakes in your xml files or constants.
Here you go:
select length('123-345-566') - length(replace('123-345-566','-',null))
from dual;
Technically, if the string you want to check contains only the character you want to count, the above query will return NULL; the following query will give the correct answer in all cases:
select coalesce(length('123-345-566') - length(replace('123-345-566','-',null)), length('123-345-566'), 0)
from dual;
The final 0 in coalesce
catches the case where you're counting in an empty string (i.e. NULL, because length(NULL) = NULL in ORACLE).
I ended up finding it through the IntelliSense on the get()
function. So, I'll post it here for anyone who is looking for similar information.
Anyways, the syntax is nearly identical, but slightly different. Instead of using URLSearchParams()
the parameters need to be initialized as HttpParams()
and the property within the get()
function is now called params
instead of search
.
import { HttpClient, HttpParams } from '@angular/common/http';
getLogs(logNamespace): Observable<any> {
// Setup log namespace query parameter
let params = new HttpParams().set('logNamespace', logNamespace);
return this._HttpClient.get(`${API_URL}/api/v1/data/logs`, { params: params })
}
I actually prefer this syntax as its a little more parameter agnostic. I also refactored the code to make it slightly more abbreviated.
getLogs(logNamespace): Observable<any> {
return this._HttpClient.get(`${API_URL}/api/v1/data/logs`, {
params: new HttpParams().set('logNamespace', logNamespace)
})
}
Multiple Parameters
The best way I have found thus far is to define a Params
object with all of the parameters I want to define defined within. As @estus pointed out in the comment below, there are a lot of great answers in This Question as to how to assign multiple parameters.
getLogs(parameters) {
// Initialize Params Object
let params = new HttpParams();
// Begin assigning parameters
params = params.append('firstParameter', parameters.valueOne);
params = params.append('secondParameter', parameters.valueTwo);
// Make the API call using the new parameters.
return this._HttpClient.get(`${API_URL}/api/v1/data/logs`, { params: params })
Multiple Parameters with Conditional Logic
Another thing I often do with multiple parameters is allow the use of multiple parameters without requiring their presence in every call. Using Lodash, it's pretty simple to conditionally add/remove parameters from calls to the API. The exact functions used in Lodash or Underscores, or vanilla JS may vary depending on your application, but I have found that checking for property definition works pretty well. The function below will only pass parameters that have corresponding properties within the parameters variable passed into the function.
getLogs(parameters) {
// Initialize Params Object
let params = new HttpParams();
// Begin assigning parameters
if (!_.isUndefined(parameters)) {
params = _.isUndefined(parameters.valueOne) ? params : params.append('firstParameter', parameters.valueOne);
params = _.isUndefined(parameters.valueTwo) ? params : params.append('secondParameter', parameters.valueTwo);
}
// Make the API call using the new parameters.
return this._HttpClient.get(`${API_URL}/api/v1/data/logs`, { params: params })
You need to execute all the different-user commands as their own script. If it's just one, or a few commands, then inline should work. If it's lots of commands then it's probably best to move them to their own file.
su -c "cd /home/$USERNAME/$PROJECT ; svn update" -m "$USERNAME"
Normally, IIS would use the process identity (the user account it is running the worker process as) to access protected resources like file system or network.
With passthrough authentication, IIS will attempt to use the actual identity of the user when accessing protected resources.
If the user is not authenticated, IIS will use the application pool identity instead. If pool identity is set to NetworkService or LocalSystem, the actual Windows account used is the computer account.
The IIS warning you see is not an error, it's just a warning. The actual check will be performed at execution time, and if it fails, it'll show up in the log.
I don't think it's good to generally turn off CSRF protection as long as you don't exclusively implement an API.
When looking at the Rails 4 API documentation for ActionController I found that you can turn off forgery protection on a per controller or per method base.
For example to turn off CSRF protection for methods you can use
class FooController < ApplicationController
protect_from_forgery except: :index
Faced the same issue post Firefox update to 29.0.1, this is also listed out here https://bugzilla.mozilla.org/show_bug.cgi?id=947728
Solutions:
They(Mozilla guys) have fixed this by introducing support for "-moz-appearance" for <input type="number">
.
You just need to have a style associated with your input field with "-moz-appearance:textfield;
".
I prefer the CSS way E.g.:-
.input-mini{
-moz-appearance:textfield;}
Or
You can do it inline as well:
<input type="number" style="-moz-appearance: textfield">
I thought it would be useful for future visitors to provide a bit of an explanation on what is happening here.
Illuminate\Http\Request
classLaravel's Illuminate\Http\Request
class has a method named all
(in fact the all
method is defined in a trait that the Request
class uses, called Illuminate\Http\Concerns\InteractsWithInput
). The signature of the all
method at the time of writing looks like this:
public function all($keys = null)
This method is not defined as static
and so when you try to call the method in a static context, i.e. Illuminate\Http\Request::all()
you will get the error displayed in OP's question. The all
method is an instance method and deals with information that is present in an instance of the Request
class, so calling it in this way makes no sense.
A facade in Laravel provides developers with a convenient way of accessing objects in the IoC container, and calling methods on those objects. A developer can call a method "statically" on a facade like Request::all()
, but the actual method call on the real Illuminate\Http\Request
object is not static.
A facade works like a proxy - it refers to an object in the IoC container and passes the static method call onto that object (non-statically). For instance, take the Illuminate\Support\Facades\Request
facade, this is what it looks like:
class Request extends Facade
{
protected static function getFacadeAccessor()
{
return 'request';
}
}
Under the hood, the base Illuminate\Support\Facades\Facade
class uses some PHP magic, namely the __callStatic
method to:
all
with no parametersgetFacadeAccessor
, in this case a Illuminate\Http\Request
objectall
is called non-statically on an instance of Illuminate\Http\Request
.This is why, as @patricus pointed out in his answer above, by changing the use
/import statement to refer to the facade, the error is no longer there, because as far as PHP is concerned, all
has been correctly called on an instance of Illuminate\Http\Request
.
Aliasing is another feature that Laravel provides for convenience. It works by effectively creating alias classes that point to facades in the root namespace. If you take a look at your config/app.php
file, under the aliases
key, you will find a long list of mappings of strings to facade classes. For example:
'aliases' => [
'App' => Illuminate\Support\Facades\App::class,
'Artisan' => Illuminate\Support\Facades\Artisan::class,
'Auth' => Illuminate\Support\Facades\Auth::class,
// ...
'Request' => Illuminate\Support\Facades\Request::class,
Laravel creates these alias classes for you, based on your configuration and this allows you to utilise classes available in the root namespace (as referred to by the string keys of the aliases
config) as if you're using the facade itself:
use Request:
class YourController extends Controller
{
public function yourMethod()
{
$input = Request::all();
// ...
}
}
While facades and aliasing are still provided in Laravel, it is possible and usually encouraged to go down the dependency injection route. For example, using constructor injection to achieve the same result:
use Illuminate\Http\Request;
class YourController extends Controller
{
protected $request;
public function __construct(Request $request)
{
$this->request = $request;
}
public function yourMethod()
{
$input = $this->request->all();
// ...
}
}
There are a number of benefits to this approach but in my personal opinion the greatest pro for dependency injection is that it makes your code way easier to test. By declaring the dependencies of your classes as constructor or method arguments, it becomes very easy to mock out those dependencies and unit test your class in isolation.
I had this issue when I was trying to make my Docker container smaller. It was because I'd installed Python 2.7 with:
apt-get install -y --no-install-recommends python
And I should not have included the --no-install-recommends
flag:
apt-get install -y python
in c#.net
this.WindowState = FormWindowState.Minimized
Changed the
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=API">
function(){
myMap()
}
</script>
and made it
<script type="text/javascript">
function(){
myMap()
}
</script>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=API"></script>
It worked :)
pip won't install binary packages and isn't well tested on Windows.
As Windows doesn't come with a compiler by default pip often can't be used there. easy_install can install binary packages for Windows.
== is an operator. equals is a method defined in the Object class
== checks if two objects have the same address in the memory and for primitive it checks if they have the same value.equals method on the other hand checks if the two objects which are being compared have an equal value(depending on how ofcourse the equals method has been implemented for the objects. equals method cannot be applied on primitives(which means that if a is a primitive a.equals(someobject) is not allowed, however someobject.equals(a) is allowed).
I wrote an open source library called AlgoKit, available via NuGet. It contains:
The code has been extensively tested. I definitely recommend you to give it a try.
var comparer = Comparer<int>.Default;
var heap = new PairingHeap<int, string>(comparer);
heap.Add(3, "your");
heap.Add(5, "of");
heap.Add(7, "disturbing.");
heap.Add(2, "find");
heap.Add(1, "I");
heap.Add(6, "faith");
heap.Add(4, "lack");
while (!heap.IsEmpty)
Console.WriteLine(heap.Pop().Value);
The optimal choice of implementation is strongly input-dependent — as Larkin, Sen, and Tarjan show in A back-to-basics empirical study of priority queues, arXiv:1403.0252v1 [cs.DS]. They tested implicit d-ary heaps, pairing heaps, Fibonacci heaps, binomial heaps, explicit d-ary heaps, rank-pairing heaps, quake heaps, violation heaps, rank-relaxed weak heaps, and strict Fibonacci heaps.
AlgoKit features three types of heaps that appeared to be most efficient among those tested.
For a relatively small number of elements, you would likely be interested in using implicit heaps, especially quaternary heaps (implicit 4-ary). In case of operating on larger heap sizes, amortized structures like binomial heaps and pairing heaps should perform better.
Cache the query in a global variable when it is not available.
Create a webpage to force the cache to be reloaded when you update it.
Add a call to the reloading page into your deployment scripts.
try
System.Diagnostics.EventLog appLog = new System.Diagnostics.EventLog();
appLog.Source = "This Application's Name";
appLog.WriteEntry("An entry to the Application event log.");
Besides checking the right minSdkVersion
in build.gradle
, make sure you have installed all necessary tools
and correct SDK Platform
for your preferred Android Version in SDK Manager
. In Android Studio klick on Tools -> Android -> SDK Manager. Then install at minimum (for Android 2.2 without emulator):
This is what worked for me.
I will leave the solution for decimal numbers.
Some of the solutions for decimals here are prone to overflow (if we pass a very large decimal number and the method will try to multiply it).
Tim Lloyd's solution is protected from overflow but it's not too fast.
The following solution is about 2 times faster and doesn't have an overflow problem:
public static class DecimalExtensions
{
public static decimal TruncateEx(this decimal value, int decimalPlaces)
{
if (decimalPlaces < 0)
throw new ArgumentException("decimalPlaces must be greater than or equal to 0.");
var modifier = Convert.ToDecimal(0.5 / Math.Pow(10, decimalPlaces));
return Math.Round(value >= 0 ? value - modifier : value + modifier, decimalPlaces);
}
}
[Test]
public void FastDecimalTruncateTest()
{
Assert.AreEqual(-1.12m, -1.129m. TruncateEx(2));
Assert.AreEqual(-1.12m, -1.120m. TruncateEx(2));
Assert.AreEqual(-1.12m, -1.125m. TruncateEx(2));
Assert.AreEqual(-1.12m, -1.1255m.TruncateEx(2));
Assert.AreEqual(-1.12m, -1.1254m.TruncateEx(2));
Assert.AreEqual(0m, 0.0001m.TruncateEx(3));
Assert.AreEqual(0m, -0.0001m.TruncateEx(3));
Assert.AreEqual(0m, -0.0000m.TruncateEx(3));
Assert.AreEqual(0m, 0.0000m.TruncateEx(3));
Assert.AreEqual(1.1m, 1.12m. TruncateEx(1));
Assert.AreEqual(1.1m, 1.15m. TruncateEx(1));
Assert.AreEqual(1.1m, 1.19m. TruncateEx(1));
Assert.AreEqual(1.1m, 1.111m. TruncateEx(1));
Assert.AreEqual(1.1m, 1.199m. TruncateEx(1));
Assert.AreEqual(1.2m, 1.2m. TruncateEx(1));
Assert.AreEqual(0.1m, 0.14m. TruncateEx(1));
Assert.AreEqual(0, -0.05m. TruncateEx(1));
Assert.AreEqual(0, -0.049m. TruncateEx(1));
Assert.AreEqual(0, -0.051m. TruncateEx(1));
Assert.AreEqual(-0.1m, -0.14m. TruncateEx(1));
Assert.AreEqual(-0.1m, -0.15m. TruncateEx(1));
Assert.AreEqual(-0.1m, -0.16m. TruncateEx(1));
Assert.AreEqual(-0.1m, -0.19m. TruncateEx(1));
Assert.AreEqual(-0.1m, -0.199m. TruncateEx(1));
Assert.AreEqual(-0.1m, -0.101m. TruncateEx(1));
Assert.AreEqual(0m, -0.099m. TruncateEx(1));
Assert.AreEqual(0m, -0.001m. TruncateEx(1));
Assert.AreEqual(1m, 1.99m. TruncateEx(0));
Assert.AreEqual(1m, 1.01m. TruncateEx(0));
Assert.AreEqual(-1m, -1.99m. TruncateEx(0));
Assert.AreEqual(-1m, -1.01m. TruncateEx(0));
}
The new ASP.NET Web API is a continuation of the previous WCF Web API project (although some of the concepts have changed).
WCF was originally created to enable SOAP-based services. For simpler RESTful or RPCish services (think clients like jQuery) ASP.NET Web API should be good choice.
For us, WCF is used for SOAP and Web API for REST. I wish Web API supported SOAP too. We are not using advanced features of WCF. Here is comparison from MSDN:
ASP.net Web API is all about HTTP and REST based GET,POST,PUT,DELETE with well know ASP.net MVC style of programming and JSON returnable; web API is for all the light weight process and pure HTTP based components. For one to go ahead with WCF even for simple or simplest single web service it will bring all the extra baggage. For light weight simple service for ajax or dynamic calls always WebApi just solves the need. This neatly complements or helps in parallel to the ASP.net MVC.
Check out the podcast : Hanselminutes Podcast 264 - This is not your father's WCF - All about the WebAPI with Glenn Block by Scott Hanselman for more information.
In the scenarios listed below you should go for WCF:
WEB API is a framework for developing RESTful/HTTP services.
There are so many clients that do not understand SOAP like Browsers, HTML5, in those cases WEB APIs are a good choice.
HTTP services header specifies how to secure service, how to cache the information, type of the message body and HTTP body can specify any type of content like HTML not just XML as SOAP services.
I got this error when I forgot to add new form fields/database columns to the $fillable
array in the Laravel model - the model was stripping them out.
It is not on PyPI and you should not be installing it via pip
. If you have matplotlib
installed, you should be able to import mpl_toolkits
directly:
$ pip install --upgrade matplotlib
...
$ python
>>> import mpl_toolkits
>>>
Not sure I understand the question correctly.
From what I gather, you want to be able to assign a value to Domain if it is null and also what to check if $args2 is supplied and according to the value, execute a certain code?
I changed the code to reassemble the assumptions made above.
Function DoStuff($computername, $arg2, $domain)
{
if($domain -ne $null)
{
$domain = "Domain1"
}
if($arg2 -eq $null)
{
}
else
{
}
}
DoStuff -computername "Test" -arg2 "" -domain "Domain2"
DoStuff -computername "Test" -arg2 "Test" -domain ""
DoStuff -computername "Test" -domain "Domain2"
DoStuff -computername "Test" -arg2 "Domain2"
Did that help?
You can use pattern for this:
<input id="numbers" pattern="[0-9.]+" type="number">
Here you can see the complete mobile website interface tips.
I use AJAX to do this. You have your partial with your typical twitter modal template html:
<div class="container">
<!-- Modal -->
<div class="modal fade" id="LocationNumberModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
×
</button>
<h4 class="modal-title">
Serial Numbers
</h4>
</div>
<div class="modal-body">
<span id="test"></span>
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">
Close
</button>
</div>
</div>
</div>
</div>
</div>
Then you have your controller method, I use JSON and have a custom class that rendors the view to a string. I do this so I can perform multiple ajax updates on the screen with one ajax call. Reference here: Example but you can use an PartialViewResult/ActionResult on return if you are just doing the one call. I will show it using JSON..
And the JSON Method in Controller:
public JsonResult LocationNumberModal(string partNumber = "")
{
//Business Layer/DAL to get information
return Json(new {
LocationModal = ViewUtility.RenderRazorViewToString(this.ControllerContext, "LocationNumberModal.cshtml", new SomeModelObject())
},
JsonRequestBehavior.AllowGet
);
}
And then, in the view using your modal: You can package the AJAX in your partial and call @{Html.RenderPartial... Or you can have a placeholder with a div:
<div id="LocationNumberModalContainer"></div>
then your ajax:
function LocationNumberModal() {
var partNumber = "1234";
var src = '@Url.Action("LocationNumberModal", "Home", new { area = "Part" })'
+ '?partNumber='' + partNumber;
$.ajax({
type: "GET",
url: src,
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
$("#LocationNumberModalContainer").html(data.LocationModal);
$('#LocationNumberModal').modal('show');
}
});
};
Then the button to your modal:
<button type="button" id="GetLocBtn" class="btn btn-default" onclick="LocationNumberModal()">Get</button>
$string = "Hello, this is the first example, where I am going to have a string that is over 50 characters and is super long, I don't know how long maybe around 1000 characters. Anyway this should be over 50 characters know...";
if(strlen($string) >= 50)
{
echo substr($string, 50); //prints everything after 50th character
echo substr($string, 0, 50); //prints everything before 50th character
}
You can also use info files
to list all the sections of all the binaries loaded in process binary.
An
in
statement will be parsed identically tofield=val1 or field=val2 or field=val3
. Putting a null in there will boil down tofield=null
which won't work.
I would do this for clairity
SELECT *
FROM tbl_name
WHERE
(id_field IN ('value1', 'value2', 'value3') OR id_field IS NULL)
I would use "wkhtmltopdf". It just work great. It uses webkit engine (used in Chrome, Safari, etc.), and it is very easy to use:
wkhtmltopdf stackoverflow.com/questions/923885/ this_question.pdf
That's it!
SQLDataReaders are forward-only. You're essentially doing this:
count++; // initially 1
.DataBind(); //consuming all the records
//next iteration on
.Read()
//we've now come to end of resultset, thanks to the DataBind()
//count is still 1
You could do this instead:
if (reader.HasRows)
{
rep.DataSource = reader;
rep.DataBind();
}
int count = rep.Items.Count; //somehow count the num rows/items `rep` has.
You could make it absolute
and put zeros to top
and bottom
that is:
#fullHeightDiv {
position: absolute;
top: 0;
bottom: 0;
}
To build on Louis's helpful answer...
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
...
caps = DesiredCapabilities.PHANTOMJS
caps["phantomjs.page.settings.userAgent"] = "whatever you want"
driver = webdriver.PhantomJS(desired_capabilities=caps)
The only minor issue is that, unlike for Firefox and Chrome, this does not return your custom setting:
driver.execute_script("return navigator.userAgent")
So, if anyone figures out how to do that in PhantomJS, please edit my answer or add a comment below! Cheers.
Yes, it does deserialize to List<>. No need to keep it in an array and wrap/encapsulate it in a list.
public class UserHolder
{
private List<User> users = null;
public UserHolder()
{
}
[XmlElement("user")]
public List<User> Users
{
get { return users; }
set { users = value; }
}
}
Deserializing code,
XmlSerializer xs = new XmlSerializer(typeof(UserHolder));
UserHolder uh = (UserHolder)xs.Deserialize(new StringReader(str));
I wanted a directive that could be limited in range by min
and max
attributes like so:
<input type="text" integer min="1" max="10" />
so I wrote the following:
.directive('integer', function() {
return {
restrict: 'A',
require: '?ngModel',
link: function(scope, elem, attr, ngModel) {
if (!ngModel)
return;
function isValid(val) {
if (val === "")
return true;
var asInt = parseInt(val, 10);
if (asInt === NaN || asInt.toString() !== val) {
return false;
}
var min = parseInt(attr.min);
if (min !== NaN && asInt < min) {
return false;
}
var max = parseInt(attr.max);
if (max !== NaN && max < asInt) {
return false;
}
return true;
}
var prev = scope.$eval(attr.ngModel);
ngModel.$parsers.push(function (val) {
// short-circuit infinite loop
if (val === prev)
return val;
if (!isValid(val)) {
ngModel.$setViewValue(prev);
ngModel.$render();
return prev;
}
prev = val;
return val;
});
}
};
});
? react-native eject
error Unrecognized command "eject". info Run "react-native --help" to see a list of all available commands.
? react-native upgrade --legacy true
error: unknown option `--legacy'
You can init a new project that's named the same in another folder and copy ios dir over:
inside YourProjectName directory
npx react-native init YourProjectName
mv YourProjectName/ios ios
rm -rf YourProjectName
Make sure you have clean git history before doing so, in case you need to revert
It doesn't need to be complicated:
val = df.loc[df.wd==1, 'col_name'].values[0]
I was importing also some projects from VS2010 to VS 2012. I had the same errors. The errors disappeared when I set back Properties > Config. Properties > General > Platform Toolset to v100 (VS2010). That might not be the correct approach, however.
You can create a new keystore, but the Android Market wont allow you to upload the apk as an update - worse still, if you try uploading the apk as a new app it will not allow it either as it knows there is a 'different' version of the same apk already in the market even if you delete your previous version from the market
Do your absolute best to find that keystore!!
When you find it, email it to yourself so you have a copy on your gmail that you can go and get in the case you loose it from your hard drive!
If nesting your grid in a border control
<Border>
<Grid>
</Grid>
</Border>
does not do what you want, then you are going to have to make your own control template for the grid (or border) that DOES do what you want.
To uninstall Anaconda open a terminal window:
rm -rf ~/anaconda
~/.bash_profile
and remove the anaconda directory from your PATH
environment variable.Note: You may need to edit .bashrc
and/or .profile
files instead of .bash_profile
Remove the following hidden files and directories, which may have been created in the home directory:
.condarc
.conda
.continuum
Use:
rm -rf ~/.condarc ~/.conda ~/.continuum
Simply
First Define Path
doskey ~=cd %homepath%
Then Access
~
What I would do is comment out the Dockerfile below and including the offending line. Then you can run the container and run the docker commands by hand, and look at the logs in the usual way. E.g. if the Dockerfile is
RUN foo
RUN bar
RUN baz
and it's dying at bar I would do
RUN foo
# RUN bar
# RUN baz
Then
$ docker build -t foo .
$ docker run -it foo bash
container# bar
...grep logs...
The best way to do it I think is:
if(val != true){
//do something
}
This will be true if val is false, NaN, or undefined.
You can use String formatting for the double type. Here is an example:
double val = 58.6547;
String.Format("{0:0.##}", val);
//Output: "58.65"
double val = 58.6;
String.Format("{0:0.##}", val);
//Output: "58.6"
double val = 58.0;
String.Format("{0:0.##}", val);
//Output: "58"
Let me know if this doesn't help.
Adding to ADev's answer (which in my opinion is the most correct), since the widespread adoption of Kotlin, and its useful extension functions:
fun ImageView.setTint(context: Context, @ColorRes colorId: Int) {
val color = ContextCompat.getColor(context, colorId)
val colorStateList = ColorStateList.valueOf(color)
ImageViewCompat.setImageTintList(this, colorStateList)
}
I think this is a function which could be useful to have in any Android project!
No prompt use:
dir /x
Procure o nome reduzido do diretório na linha do "Program Files (x86)"
27/08/2018 15:07 <DIR> PROGRA~2 Program Files (x86)
Coloque a seguinte configuração em php.ini para a opção:
extension_dir="C:\PROGRA~2\path\to\php\ext"
Acredito que isso resolverá seu problema.
Zorro
li:nth-child(1n) { color:green; }_x000D_
li:nth-child(2n) { color:red; }
_x000D_
<ul>_x000D_
<li>list element 1</li>_x000D_
<li>list element 2</li>_x000D_
<li>list element 3</li>_x000D_
<li>list element 4</li>_x000D_
</ul>
_x000D_
See browser support here : CSS3 :nth-child() Selector
Since strings are immutable, both versions are safe. The latter, however, is less efficient (it creates an extra object and in some cases copies the character data).
With this in mind, the first version should be preferred.
<input type="button" value="..." onClick="fbLikeDump(); WriteCookie();" />
If the 'Cool Options' are hidden from the view before the field is focused then you would want to create this in JQuery instead of having it in the DOM so anyone using a screen reader wouldn't see unnecessary information. Why should they have to listen to it when we don't have to see it?
So you can setup variables like so:
var $coolOptions= $("<div id='options'></div>").text("Some cool options");
and then append (or prepend) on focus
$("input[name='input_name']").focus(function() {
$(this).append($coolOptions);
});
and then remove when the focus ends
$("input[name='input_name']").focusout(function() {
$('#options').remove();
});
this will display current ate & time. Working on my side perfectly
$("#datePicker").datetimepicker({
format: 'DD-MM-YYYY HH:mm A',
defaultDate: new Date(),
});
Firstly, on Unix you use mount
, not ls /mnt
: many things are not mounted in /mnt
.
Anyhow, there's the mountvol
DOS command, which continues to work in Powershell, and there's the Powershell-specific Get-PSDrive
.
It looks that some files are still left and some registry keys are left. So you can run revocleaner tool to remove those entries as well. Do a reboot and install again it should be doing it now. I also faced issue and by complete cleaning I got Rid of it.
Here you go. Just specify the chars you want to allow on the first line.
char[] chars = "abcdefghijklmnopqrstuvwxyz".toCharArray();
StringBuilder sb = new StringBuilder(20);
Random random = new Random();
for (int i = 0; i < 20; i++) {
char c = chars[random.nextInt(chars.length)];
sb.append(c);
}
String output = sb.toString();
System.out.println(output);
If you are using this to generate something sensitive like a password reset URL or session ID cookie or temporary password reset, be sure to use
java.security.SecureRandom
instead. Values produced byjava.util.Random
andjava.util.concurrent.ThreadLocalRandom
are mathematically predictable.
Use ToArray()
on List<T>
.
With PowerShell 5.1 in Windows 10 you can use:
Get-SmbMapping | Remove-SmbMapping -Confirm:$false
You can either:
1) Pass raw arguments and use the {0} syntax. E.g:
DbContext.Database.SqlQuery("StoredProcedureName {0}", paramName);
2) Pass DbParameter subclass arguments and use @ParamName syntax.
DbContext.Database.SqlQuery("StoredProcedureName @ParamName",
new SqlParameter("@ParamName", paramValue);
If you use the first syntax, EF will actually wrap your arguments with DbParamater classes, assign them names, and replace {0} with the generated parameter name.
The first syntax if preferred because you don't need to use a factory or know what type of DbParamaters to create (SqlParameter, OracleParamter, etc.).
If you want a Popup that closes automatically, you should look for Toasts. But if you want a dialog that the user has to close first before proceeding, you should look for a Dialog.
For both approaches it is possible to read a text file with the text you want to display. But you could also hardcode the text or use R.String to set the text.
OK, answering to my own question.
Steps to connect LocalDB to Visual Studio Server Explorer
SqlLocalDB.exe start v11.0
SqlLocalDB.exe info v11.0
(localdb)\v11.0
. If it didn't work, use the Instance pipe name that you copied earlier. You can also use this to connect with SQL Management Studio.AF_INET = Address Format, Internet = IP Addresses
PF_INET = Packet Format, Internet = IP, TCP/IP or UDP/IP
AF_INET is the address family that is used for the socket you're creating (in this case an Internet Protocol address). The Linux kernel, for example, supports 29 other address families such as UNIX sockets and IPX, and also communications with IRDA and Bluetooth (AF_IRDA and AF_BLUETOOTH, but it is doubtful you'll use these at such a low level).
For the most part sticking with AF_INET for socket programming over a network is the safest option.
Meaning, AF_INET refers to addresses from the internet, IP addresses specifically.
PF_INET refers to anything in the protocol, usually sockets/ports.
Use List<Integer> list = new ArrayList<Integer>();
If you want to copy the entire contents of a folder recursively into another folder, you can execute the following windows command from gulp:
xcopy /path/to/srcfolder /path/to/destfolder /s /e /y
The /y
option at the end is to suppress the overwrite confirmation message.
In Linux, you can execute the following command from gulp:
cp -R /path/to/srcfolder /path/to/destfolder
you can use gulp-exec or gulp-run plugin to execute system commands from gulp.
Related Links:
Use ng-click
in place of onclick
. and its as simple as that:
<a href="www.mysite.com" ng-click="return theFunction();">Item</a>
<script type="text/javascript">
function theFunction () {
// return true or false, depending on whether you want to allow
// the`href` property to follow through or not
}
</script>
You can observer the progress of the download manager using LiveData and coroutines, see the gist below
https://gist.github.com/FhdAlotaibi/678eb1f4fa94475daf74ac491874fc0e
data class DownloadItem(val bytesDownloadedSoFar: Long = -1, val totalSizeBytes: Long = -1, val status: Int)
class DownloadProgressLiveData(private val application: Application, private val requestId: Long) : LiveData<DownloadItem>(), CoroutineScope {
private val downloadManager by lazy {
application.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
}
private val job = Job()
override val coroutineContext: CoroutineContext
get() = Dispatchers.IO + job
override fun onActive() {
super.onActive()
launch {
while (isActive) {
val query = DownloadManager.Query().setFilterById(requestId)
val cursor = downloadManager.query(query)
if (cursor.moveToFirst()) {
val status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))
Timber.d("Status $status")
when (status) {
DownloadManager.STATUS_SUCCESSFUL,
DownloadManager.STATUS_PENDING,
DownloadManager.STATUS_FAILED,
DownloadManager.STATUS_PAUSED -> postValue(DownloadItem(status = status))
else -> {
val bytesDownloadedSoFar = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR))
val totalSizeBytes = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES))
postValue(DownloadItem(bytesDownloadedSoFar.toLong(), totalSizeBytes.toLong(), status))
}
}
if (status == DownloadManager.STATUS_SUCCESSFUL || status == DownloadManager.STATUS_FAILED)
cancel()
} else {
postValue(DownloadItem(status = DownloadManager.STATUS_FAILED))
cancel()
}
cursor.close()
delay(300)
}
}
}
override fun onInactive() {
super.onInactive()
job.cancel()
}
}
Just a brief note - I'm using a modified version of plain.bst sitting in the directory with my Latex files; it turns out having sorting by order of appearance is a relatively easy change; just find the piece of code:
...
ITERATE {presort}
SORT
...
... and comment it - I turned it to:
...
%% % avoid sort:
%% ITERATE {presort}
%%
%% SORT
...
... and then, after running bibtex
, pdflatex
, pdflatex
- the citations will be sorted by order of appearance (that is, they will be unsorted :) ).
Cheers!
EDIT: just realized that what I wrote is actually in the comment by @ChrisN: "can you edit it to remove the SORT command" ;)
Dashboard -> [your app] -> [View Details] -> Settings -> Basic
We can also do the same using java 8.
public static<T> List<T> reverseList(List<T> list) {
List<T> reverse = new ArrayList<>(list.size());
list.stream()
.collect(Collectors.toCollection(LinkedList::new))
.descendingIterator()
.forEachRemaining(reverse::add);
return reverse;
}
I prefer to use the FindItem method and use the value path for locating the item. Make sure your PathSeparator property on the menu matches what you're using in FindItem parameter.
protected void Page_Load(object sender, EventArgs e)
{
// remove manage user accounts menu item for non-admin users.
if (!Page.User.IsInRole("Admin"))
{
MenuItem item = NavigationMenu.FindItem("Users/Manage Accounts");
item.Parent.ChildItems.Remove(item);
}
}
Yes, its possible to set the font to the entire application.
The easiest way to accomplish this is to package the desired font(s) with your application.
To do this, simply create an assets/ folder in the project root, and put your fonts (in TrueType, or TTF, form) in the assets.
You might, for example, create assets/fonts/ and put your TTF files in there.
public class FontSampler extends Activity {
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
TextView tv=(TextView)findViewById(R.id.custom);
Typeface face=Typeface.createFromAsset(getAssets(), "fonts/HandmadeTypewriter.ttf");
tv.setTypeface(face);
}
}
In this Java best practices book by Joshua Bloch, you can find explained why you should enforce the Singleton property with a private constructor or an Enum type. The chapter is quite long, so keeping it summarized:
Making a class a Singleton can make it difficult to test its clients, as it’s impossible to substitute a mock implementation for a singleton unless it implements an interface that serves as its type. Recommended approach is implement Singletons by simply make an enum type with one element:
// Enum singleton - the preferred approach
public enum Elvis {
INSTANCE;
public void leaveTheBuilding() { ... }
}
This approach is functionally equivalent to the public field approach, except that it is more concise, provides the serialization machinery for free, and provides an ironclad guarantee against multiple instantiation, even in the face of sophisticated serialization or reflection attacks.
While this approach has yet to be widely adopted, a single-element enum type is the best way to implement a singleton.
SELECT * from `user` ORDER BY `user_id`;
SET @count = 0;
UPDATE `user` SET `user_id` = @count:= @count + 1;
ALTER TABLE `user_id` AUTO_INCREMENT = 1;
if you want to order by
You can use an array in the select() to define more columns and you can use the DB::raw() there with aliasing it to followers. Should look like this:
$query = DB::table('category_issue')
->select(array('issues.*', DB::raw('COUNT(issue_subscriptions.issue_id) as followers')))
->where('category_id', '=', 1)
->join('issues', 'category_issue.issue_id', '=', 'issues.id')
->left_join('issue_subscriptions', 'issues.id', '=', 'issue_subscriptions.issue_id')
->group_by('issues.id')
->order_by('followers', 'desc')
->get();
I assume you install gems into vendor/bundle
? If so, why not just delete all the gems and do a clean bundle install
?
Yes, it is because you are using auto layout. Setting the view frame and resizing mask will not work.
You should read Working with Auto Layout Programmatically and Visual Format Language.
You will need to get the current constraints, add the text field, adjust the contraints for the text field, then add the correct constraints on the text field.
Depending on what you need, you can use either element.innerText
or element.textContent
. They differ in many ways. innerText
tries to approximate what would happen if you would select what you see (rendered html) and copy it to the clipboard, while textContent
sort of just strips the html tags and gives you what's left.
innerText
is not just used for IE anymore, and it is supported in all major browsers. Of course, unlike textContent
, it has compatability with old IE browsers (since they came up with it).
Complete example (from Gabi's answer):
var element = document.getElementById('txt');
var text = element.innerText || element.textContent; // or element.textContent || element.innerText
element.innerHTML = text;
Session.Abandon()
destroys the session and the Session_OnEnd event is triggered.
Session.Clear()
just removes all values (content) from the Object. The session with the same key is still alive.
So, if you use Session.Abandon()
, you lose that specific session and the user will get a new session key. You could use it for example when the user logs out.
Use Session.Clear()
, if you want that the user remaining in the same session (if you don't want the user to relogin for example) and reset all the session specific data.
I wrote a simple test for all the above.
def eq(a, b)
puts "#{[a, '==', b]} : #{a == b}"
puts "#{[a, '===', b]} : #{a === b}"
puts "#{[a, '.eql?', b]} : #{a.eql?(b)}"
puts "#{[a, '.equal?', b]} : #{a.equal?(b)}"
end
eq("all", "all")
eq(:all, :all)
eq(Object.new, Object.new)
eq(3, 3)
eq(1, 1.0)
You can try writing into the Documents folder. Here is a "debug" function I did for the debugging needs of my project:
Private Sub writeDebug(ByVal x As String)
Dim path As String = System.Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)
Dim FILE_NAME As String = path & "\mydebug.txt"
MsgBox(FILE_NAME)
If System.IO.File.Exists(FILE_NAME) = False Then
System.IO.File.Create(FILE_NAME).Dispose()
End If
Dim objWriter As New System.IO.StreamWriter(FILE_NAME, True)
objWriter.WriteLine(x)
objWriter.Close()
End Sub
There are more standard folders you can access through the "SpecialFolder" object.
I don't like messing with the DataSource personally so after discussing the issue with an IT friend I was able to discover this way which is simple and doesn't effect the DataSource. Hope this helps!
foreach (DataGridViewRow row in dataGridView1.Rows)
{
foreach (DataGridViewCell cell in row.Cells)
{
cell.Value = "";
}
}
From Understanding Weak References, by Ethan Nicholas:
Weak references
A weak reference, simply put, is a reference that isn't strong enough to force an object to remain in memory. Weak references allow you to leverage the garbage collector's ability to determine reachability for you, so you don't have to do it yourself. You create a weak reference like this:
WeakReference weakWidget = new WeakReference(widget);
and then elsewhere in the code you can use
weakWidget.get()
to get the actualWidget
object. Of course the weak reference isn't strong enough to prevent garbage collection, so you may find (if there are no strong references to the widget) thatweakWidget.get()
suddenly starts returningnull
....
Soft references
A soft reference is exactly like a weak reference, except that it is less eager to throw away the object to which it refers. An object which is only weakly reachable (the strongest references to it are
WeakReferences
) will be discarded at the next garbage collection cycle, but an object which is softly reachable will generally stick around for a while.
SoftReferences
aren't required to behave any differently thanWeakReferences
, but in practice softly reachable objects are generally retained as long as memory is in plentiful supply. This makes them an excellent foundation for a cache, such as the image cache described above, since you can let the garbage collector worry about both how reachable the objects are (a strongly reachable object will never be removed from the cache) and how badly it needs the memory they are consuming.
And Peter Kessler added in a comment:
The Sun JRE does treat SoftReferences differently from WeakReferences. We attempt to hold on to object referenced by a SoftReference if there isn't pressure on the available memory. One detail: the policy for the "-client" and "-server" JRE's are different: the -client JRE tries to keep your footprint small by preferring to clear SoftReferences rather than expand the heap, whereas the -server JRE tries to keep your performance high by preferring to expand the heap (if possible) rather than clear SoftReferences. One size does not fit all.
Let's say N = 5 and your model is Message
, you can do something like this:
Message.order(id: :asc).from(Message.all.order(id: :desc).limit(5), :messages)
Look at the sql:
SELECT "messages".* FROM (
SELECT "messages".* FROM "messages" ORDER BY "messages"."created_at" DESC LIMIT 5
) messages ORDER BY "messages"."created_at" ASC
The key is the subselect. First we need to define what are the last messages we want and then we have to order them in ascending order.
I've written a post about this once: Resolving circular dependencies in c++
The basic technique is to decouple the classes using interfaces. So in your case:
//Printer.h
class Printer {
public:
virtual Print() = 0;
}
//A.h
#include "Printer.h"
class A: public Printer
{
int _val;
Printer *_b;
public:
A(int val)
:_val(val)
{
}
void SetB(Printer *b)
{
_b = b;
_b->Print();
}
void Print()
{
cout<<"Type:A val="<<_val<<endl;
}
};
//B.h
#include "Printer.h"
class B: public Printer
{
double _val;
Printer* _a;
public:
B(double val)
:_val(val)
{
}
void SetA(Printer *a)
{
_a = a;
_a->Print();
}
void Print()
{
cout<<"Type:B val="<<_val<<endl;
}
};
//main.cpp
#include <iostream>
#include "A.h"
#include "B.h"
int main(int argc, char* argv[])
{
A a(10);
B b(3.14);
a.Print();
a.SetB(&b);
b.Print();
b.SetA(&a);
return 0;
}
You need to put the format arguments into a tuple (add parentheses):
instr = "'%s', '%s', '%d', '%s', '%s', '%s', '%s'" % (softname, procversion, int(percent), exe, description, company, procurl)
What you currently have is equivalent to the following:
intstr = ("'%s', '%s', '%d', '%s', '%s', '%s', '%s'" % softname), procversion, int(percent), exe, description, company, procurl
Example:
>>> "%s %s" % 'hello', 'world'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: not enough arguments for format string
>>> "%s %s" % ('hello', 'world')
'hello world'
I found an easy answer and so thought of posting it for my future reference too.
Its from the links http://www.learncpp.com/cpp-tutorial/115-inheritance-and-access-specifiers/
class Base
{
public:
int m_nPublic; // can be accessed by anybody
private:
int m_nPrivate; // can only be accessed by Base member functions (but not derived classes)
protected:
int m_nProtected; // can be accessed by Base member functions, or derived classes.
};
class Derived: public Base
{
public:
Derived()
{
// Derived's access to Base members is not influenced by the type of inheritance used,
// so the following is always true:
m_nPublic = 1; // allowed: can access public base members from derived class
m_nPrivate = 2; // not allowed: can not access private base members from derived class
m_nProtected = 3; // allowed: can access protected base members from derived class
}
};
int main()
{
Base cBase;
cBase.m_nPublic = 1; // allowed: can access public members from outside class
cBase.m_nPrivate = 2; // not allowed: can not access private members from outside class
cBase.m_nProtected = 3; // not allowed: can not access protected members from outside class
}
There is no advantage of using one vs the other, but, there is a specific case where throw
won't work. However, those cases can be fixed.
Any time you are inside of a promise callback, you can use throw
. However, if you're in any other asynchronous callback, you must use reject
.
For example, this won't trigger the catch:
new Promise(function() {
setTimeout(function() {
throw 'or nah';
// return Promise.reject('or nah'); also won't work
}, 1000);
}).catch(function(e) {
console.log(e); // doesn't happen
});
_x000D_
Instead you're left with an unresolved promise and an uncaught exception. That is a case where you would want to instead use reject
. However, you could fix this in two ways.
new Promise(function(resolve, reject) {
setTimeout(function() {
reject('or nah');
}, 1000);
}).catch(function(e) {
console.log(e); // works!
});
_x000D_
function timeout(duration) { // Thanks joews
return new Promise(function(resolve) {
setTimeout(resolve, duration);
});
}
timeout(1000).then(function() {
throw 'worky!';
// return Promise.reject('worky'); also works
}).catch(function(e) {
console.log(e); // 'worky!'
});
_x000D_
I could be wrong, but I believe since you are inheriting from foo, you have to call a base constructor. Since you explicitly defined the foo constructor to require (int, int) now you need to pass that up the chain.
public bar(int a, int b) : base(a, b)
{
c = a * b;
}
This will initialize foo's variables first and then you can use them in bar. Also, to avoid confusion I would recommend not naming parameters the exact same as the instance variables. Try p_a or something instead, so you won't accidentally be handling the wrong variable.
Use the strconv
package's Itoa
function.
For example:
package main
import (
"strconv"
"fmt"
)
func main() {
t := strconv.Itoa(123)
fmt.Println(t)
}
You can concat strings simply by +
'ing them, or by using the Join
function of the strings
package.
The best approach for you to communicate between the two controllers is to use events.
In this check out $on
, $broadcast
and $emit
.
In general use case the usage of angular.element(catapp).scope()
was designed for use outside the angular controllers, like within jquery events.
Ideally in your usage you would write an event in controller 1 as:
$scope.$on("myEvent", function (event, args) {
$scope.rest_id = args.username;
$scope.getMainCategories();
});
And in the second controller you'd just do
$scope.initRestId = function(){
$scope.$broadcast("myEvent", {username: $scope.user.username });
};
Edit: Realised it was communication between two modules
Can you try including the firstApp
module as a dependency to the secondApp
where you declare the angular.module
. That way you can communicate to the other app.
For multiple files in ajax try this
var url = "your_url";
var data = $('#form').serialize();
var form_data = new FormData();
//get the length of file inputs
var length = $('input[type="file"]').length;
for(var i = 0;i<length;i++){
file_data = $('input[type="file"]')[i].files;
form_data.append("file_"+i, file_data[0]);
}
// for other data
form_data.append("data",data);
$.ajax({
url: url,
type: "POST",
data: form_data,
cache: false,
contentType: false, //important
processData: false, //important
success: function (data) {
//do something
}
})
In php
parse_str($_POST['data'], $_POST);
for($i=0;$i<count($_FILES);$i++){
if(isset($_FILES['file_'.$i])){
$file = $_FILES['file_'.$i];
$file_name = $file['name'];
$file_type = $file ['type'];
$file_size = $file ['size'];
$file_path = $file ['tmp_name'];
}
}
You can't use IF like that. You can do what you want with AND and OR:
SELECT t.first_name,
t.last_name,
t.employid,
t.status
FROM employeetable t
WHERE ((status_flag = STATUS_ACTIVE AND t.status = 'A')
OR (status_flag = STATUS_INACTIVE AND t.status = 'T')
OR (source_flag = SOURCE_FUNCTION AND t.business_unit = 'production')
OR (source_flag = SOURCE_USER AND t.business_unit = 'users'))
AND t.first_name LIKE firstname
AND t.last_name LIKE lastname
AND t.employid LIKE employeeid;
Turn if off:
You can use error_reporting();
or put an @ in front of your fileopen().
You JSON doesn't match your struct fields: E.g. "district" in JSON and "District" as the field.
Also: Your Item is a slice type but your JSON is a dict value. Do not mix this up. Slices decode from arrays.
I don't know, if it's only with me but for me og:image
does not work and it picks my site logo, even though facebook debugger shows the correct image.
But changing og:image
to og:image:url
worked for me. Hope this helps anybody else facing similar issue.
You can also try dropping the index column if it is not needed to compare:
print(df1.reset_index(drop=True) == df2.reset_index(drop=True))
I have used this same technique in a unit test like so:
from pandas.util.testing import assert_frame_equal
assert_frame_equal(actual.reset_index(drop=True), expected.reset_index(drop=True))
In iOS7, if your navigation controller is contained in tab bar, splitview or some other container, then for globally changing navigationbar appearance use following method ::
[[UINavigationBar appearanceWhenContainedIn:[UITabBarController class],nil] setBarTintColor:[UIColor blueColor]];
Try using cmake itself. In the build directory, run:
cmake --build .
In php7.2 Ubuntu 18.04 LTS and ubuntu 19.04
sudo apt-get install php-gd php-xml php7.2-mbstring
Works like a Charm
Here is quick and dirty color generator in C# (using 'RYB approach' described in this article). It's a rewrite from JavaScript.
Use:
List<Color> ColorPalette = ColorGenerator.Generate(30).ToList();
First two colors tend to be white and a shade of black. I often skip them like this (using Linq):
List<Color> ColorsPalette = ColorGenerator
.Generate(30)
.Skip(2) // skip white and black
.ToList();
Implementation:
public static class ColorGenerator
{
// RYB color space
private static class RYB
{
private static readonly double[] White = { 1, 1, 1 };
private static readonly double[] Red = { 1, 0, 0 };
private static readonly double[] Yellow = { 1, 1, 0 };
private static readonly double[] Blue = { 0.163, 0.373, 0.6 };
private static readonly double[] Violet = { 0.5, 0, 0.5 };
private static readonly double[] Green = { 0, 0.66, 0.2 };
private static readonly double[] Orange = { 1, 0.5, 0 };
private static readonly double[] Black = { 0.2, 0.094, 0.0 };
public static double[] ToRgb(double r, double y, double b)
{
var rgb = new double[3];
for (int i = 0; i < 3; i++)
{
rgb[i] = White[i] * (1.0 - r) * (1.0 - b) * (1.0 - y) +
Red[i] * r * (1.0 - b) * (1.0 - y) +
Blue[i] * (1.0 - r) * b * (1.0 - y) +
Violet[i] * r * b * (1.0 - y) +
Yellow[i] * (1.0 - r) * (1.0 - b) * y +
Orange[i] * r * (1.0 - b) * y +
Green[i] * (1.0 - r) * b * y +
Black[i] * r * b * y;
}
return rgb;
}
}
private class Points : IEnumerable<double[]>
{
private readonly int pointsCount;
private double[] picked;
private int pickedCount;
private readonly List<double[]> points = new List<double[]>();
public Points(int count)
{
pointsCount = count;
}
private void Generate()
{
points.Clear();
var numBase = (int)Math.Ceiling(Math.Pow(pointsCount, 1.0 / 3.0));
var ceil = (int)Math.Pow(numBase, 3.0);
for (int i = 0; i < ceil; i++)
{
points.Add(new[]
{
Math.Floor(i/(double)(numBase*numBase))/ (numBase - 1.0),
Math.Floor((i/(double)numBase) % numBase)/ (numBase - 1.0),
Math.Floor((double)(i % numBase))/ (numBase - 1.0),
});
}
}
private double Distance(double[] p1)
{
double distance = 0;
for (int i = 0; i < 3; i++)
{
distance += Math.Pow(p1[i] - picked[i], 2.0);
}
return distance;
}
private double[] Pick()
{
if (picked == null)
{
picked = points[0];
points.RemoveAt(0);
pickedCount = 1;
return picked;
}
var d1 = Distance(points[0]);
int i1 = 0, i2 = 0;
foreach (var point in points)
{
var d2 = Distance(point);
if (d1 < d2)
{
i1 = i2;
d1 = d2;
}
i2 += 1;
}
var pick = points[i1];
points.RemoveAt(i1);
for (int i = 0; i < 3; i++)
{
picked[i] = (pickedCount * picked[i] + pick[i]) / (pickedCount + 1.0);
}
pickedCount += 1;
return pick;
}
public IEnumerator<double[]> GetEnumerator()
{
Generate();
for (int i = 0; i < pointsCount; i++)
{
yield return Pick();
}
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
}
public static IEnumerable<Color> Generate(int numOfColors)
{
var points = new Points(numOfColors);
foreach (var point in points)
{
var rgb = RYB.ToRgb(point[0], point[1], point[2]);
yield return Color.FromArgb(
(int)Math.Floor(255 * rgb[0]),
(int)Math.Floor(255 * rgb[1]),
(int)Math.Floor(255 * rgb[2]));
}
}
}
First Talk About
Normal Class - that's mean any class define that's a normally in java it's means you create different type of method properties etc.
Bean - Bean is nothing it's only a object of that particular class using this bean you can access your java class same as object..
and after that talk about last one POJO
POJO - POJO is that class which have no any services it's have only a default constructor and private property and those property for setting a value corresponding setter and getter methods. It's short form of Plain Java Object.
It is hidden in Setting menu, section general
(not repository
!) at https://gitlab.com/$USER_NAME/$PROJECT_NAME/edit
and it again hidden in a section "Advance settings"- you need to click a "expand" button.
Tks Ramon Gil Moreno.
Pasting in Terminal and then restarting R Studio did the trick:
write org.rstudio.RStudio force.LANG en_US.UTF-8
Environment: MAC OS High Sierra 10.13.1 // RStudio version 3.4.2 (2017-09-28) -- "Short Summer"
Ennio De Leon
Dispose pattern:
public abstract class DisposableObject : IDisposable
{
public bool Disposed { get; private set;}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
~DisposableObject()
{
Dispose(false);
}
private void Dispose(bool disposing)
{
if (!Disposed)
{
if (disposing)
{
DisposeManagedResources();
}
DisposeUnmanagedResources();
Disposed = true;
}
}
protected virtual void DisposeManagedResources() { }
protected virtual void DisposeUnmanagedResources() { }
}
Example of inheritance:
public class A : DisposableObject
{
public Component components_a { get; set; }
private IntPtr handle_a;
protected override void DisposeManagedResources()
{
try
{
Console.WriteLine("A_DisposeManagedResources");
components_a.Dispose();
components_a = null;
}
finally
{
base.DisposeManagedResources();
}
}
protected override void DisposeUnmanagedResources()
{
try
{
Console.WriteLine("A_DisposeUnmanagedResources");
CloseHandle(handle_a);
handle_a = IntPtr.Zero;
}
finally
{
base.DisposeUnmanagedResources();
}
}
}
public class B : A
{
public Component components_b { get; set; }
private IntPtr handle_b;
protected override void DisposeManagedResources()
{
try
{
Console.WriteLine("B_DisposeManagedResources");
components_b.Dispose();
components_b = null;
}
finally
{
base.DisposeManagedResources();
}
}
protected override void DisposeUnmanagedResources()
{
try
{
Console.WriteLine("B_DisposeUnmanagedResources");
CloseHandle(handle_b);
handle_b = IntPtr.Zero;
}
finally
{
base.DisposeUnmanagedResources();
}
}
}
Use build job plugin for that task in order to trigger other jobs from jenkins file. You can add variety of logic to your execution such as parallel ,node and agents options and steps for triggering external jobs. I gave some easy-to-read cookbook example for that.
1.example for triggering external job from jenkins file with conditional example:
if (env.BRANCH_NAME == 'master') {
build job:'exactJobName' , parameters:[
string(name: 'keyNameOfParam1',value: 'valueOfParam1')
booleanParam(name: 'keyNameOfParam2',value:'valueOfParam2')
]
}
2.example triggering multiple jobs from jenkins file with conditionals example:
def jobs =[
'job1Title'{
if (env.BRANCH_NAME == 'master') {
build job:'exactJobName' , parameters:[
string(name: 'keyNameOfParam1',value: 'valueNameOfParam1')
booleanParam(name: 'keyNameOfParam2',value:'valueNameOfParam2')
]
}
},
'job2Title'{
if (env.GIT_COMMIT == 'someCommitHashToPerformAdditionalTest') {
build job:'exactJobName' , parameters:[
string(name: 'keyNameOfParam3',value: 'valueOfParam3')
booleanParam(name: 'keyNameOfParam4',value:'valueNameOfParam4')
booleanParam(name: 'keyNameOfParam5',value:'valueNameOfParam5')
]
}
}
Softwares run on the OS on a very simple premise - they require memory. The device OS provides it in the form of RAM. The amount of memory required may vary - some softwares need huge memory, some require paltry memory. Most (if not all) users run multiple applications on the OS simultaneously, and given that memory is expensive (and device size is finite), the amount of memory available is always limited. So given that all softwares require a certain amount of RAM, and all of them can be made to run at the same time, OS has to take care of two things:
Now the main question boils down to how the memory is being managed. What exactly governs where in the memory will the data belonging to a given software reside?
Possible solution 1: Let individual softwares specify explicitly the memory address they will use in the device. Suppose Photoshop declares that it will always use memory addresses ranging from
0
to1023
(imagine the memory as a linear array of bytes, so first byte is at location0
,1024
th byte is at location1023
) - i.e. occupying1 GB
memory. Similarly, VLC declares that it will occupy memory range1244
to1876
, etc.
Advantages:
Disadvantages:
This does not scale. Theoretically, an app may require a huge amount of memory when it is doing something really heavy-duty. So to ensure that it never runs out of memory, the memory area allocated to it must always be more than or equal to that amount of memory. What if a software, whose maximal theoretical memory usage is 2 GB
(hence requiring 2 GB
memory allocation from RAM), is installed in a machine with only 1 GB
memory? Should the software just abort on startup, saying that the available RAM is less than 2 GB
? Or should it continue, and the moment the memory required exceeds 2 GB
, just abort and bail out with the message that not enough memory is available?
It is not possible to prevent memory mangling. There are millions of softwares out there, even if each of them was allotted just 1 kB
memory, the total memory required would exceed 16 GB
, which is more than most devices offer. How can, then, different softwares be allotted memory slots that do not encroach upon each other's areas? Firstly, there is no centralized software market which can regulate that when a new software is being released, it must assign itself this much memory from this yet unoccupied area, and secondly, even if there were, it is not possible to do it because the no. of softwares is practically infinite (thus requiring infinite memory to accommodate all of them), and the total RAM available on any device is not sufficient to accommodate even a fraction of what is required, thus making inevitable the encroaching of the memory bounds of one software upon that of another. So what happens when Photoshop is assigned memory locations 1
to 1023
and VLC is assigned 1000
to 1676
? What if Photoshop stores some data at location 1008
, then VLC overwrites that with its own data, and later Photoshop accesses it thinking that it is the same data is had stored there previously? As you can imagine, bad things will happen.
So clearly, as you can see, this idea is rather naive.
Possible solution 2: Let's try another scheme - where OS will do majority of the memory management. Softwares, whenever they require any memory, will just request the OS, and the OS will accommodate accordingly. Say OS ensures that whenever a new process is requesting for memory, it will allocate the memory from the lowest byte address possible (as said earlier, RAM can be imagined as a linear array of bytes, so for a
4 GB
RAM, the addresses range for a byte from0
to2^32-1
) if the process is starting, else if it is a running process requesting the memory, it will allocate from the last memory location where that process still resides. Since the softwares will be emitting addresses without considering what the actual memory address is going to be where that data is stored, OS will have to maintain a mapping, per software, of the address emitted by the software to the actual physical address (Note: that is one of the two reasons we call this conceptVirtual Memory
. Softwares are not caring about the real memory address where their data are getting stored, they just spit out addresses on the fly, and the OS finds the right place to fit it and find it later if required).
Say the device has just been turned on, OS has just launched, right now there is no other process running (ignoring the OS, which is also a process!), and you decide to launch VLC. So VLC is allocated a part of the RAM from the lowest byte addresses. Good. Now while the video is running, you need to start your browser to view some webpage. Then you need to launch Notepad to scribble some text. And then Eclipse to do some coding.. Pretty soon your memory of 4 GB
is all used up, and the RAM looks like this:
Problem 1: Now you cannot start any other process, for all RAM is used up. Thus programs have to be written keeping the maximum memory available in mind (practically even less will be available, as other softwares will be running parallelly as well!). In other words, you cannot run a high-memory consuming app in your ramshackle
1 GB
PC.
Okay, so now you decide that you no longer need to keep Eclipse and Chrome open, you close them to free up some memory. The space occupied in RAM by those processes is reclaimed by OS, and it looks like this now:
Suppose that closing these two frees up 700 MB
space - (400
+ 300
) MB. Now you need to launch Opera, which will take up 450 MB
space. Well, you do have more than 450 MB
space available in total, but...it is not contiguous, it is divided into individual chunks, none of which is big enough to fit 450 MB
. So you hit upon a brilliant idea, let's move all the processes below to as much above as possible, which will leave the 700 MB
empty space in one chunk at the bottom. This is called compaction
. Great, except that...all the processes which are there are running. Moving them will mean moving the address of all their contents (remember, OS maintains a mapping of the memory spat out by the software to the actual memory address. Imagine software had spat out an address of 45
with data 123
, and OS had stored it in location 2012
and created an entry in the map, mapping 45
to 2012
. If the software is now moved in memory, what used to be at location 2012
will no longer be at 2012
, but in a new location, and OS has to update the map accordingly to map 45
to the new address, so that the software can get the expected data (123
) when it queries for memory location 45
. As far as the software is concerned, all it knows is that address 45
contains the data 123
!)! Imagine a process that is referencing a local variable i
. By the time it is accessed again, its address has changed, and it won't be able to find it any more. The same will hold for all functions, objects, variables, basically everything has an address, and moving a process will mean changing the address of all of them. Which leads us to:
Problem 2: You cannot move a process. The values of all variables, functions and objects within that process have hardcoded values as spat out by the compiler during compilation, the process depends on them being at the same location during its lifetime, and changing them is expensive. As a result, processes leave behind big "
holes
" when they exit. This is calledExternal Fragmentation
.
Fine. Suppose somehow, by some miraculous manner, you do manage to move the processes up. Now there is 700 MB
of free space at the bottom:
Opera smoothly fits in at the bottom. Now your RAM looks like this:
Good. Everything is looking fine. However, there is not much space left, and now you need to launch Chrome again, a known memory-hog! It needs lots of memory to start, and you have hardly any left...Except.. you now notice that some of the processes, which were initially occupying large space, now is not needing much space. May be you have stopped your video in VLC, hence it is still occupying some space, but not as much as it required while running a high resolution video. Similarly for Notepad and Photos. Your RAM now looks like this:
Holes
, once again! Back to square one! Except, previously, the holes occurred due to processes terminating, now it is due to processes requiring less space than before! And you again have the same problem, the holes
combined yield more space than required, but they are scattered around, not much of use in isolation. So you have to move those processes again, an expensive operation, and a very frequent one at that, since processes will frequently reduce in size over their lifetime.
Problem 3: Processes, over their lifetime, may reduce in size, leaving behind unused space, which if needed to be used, will require the expensive operation of moving many processes. This is called
Internal Fragmentation
.
Fine, so now, your OS does the required thing, moves processes around and start Chrome and after some time, your RAM looks like this:
Cool. Now suppose you again resume watching Avatar in VLC. Its memory requirement will shoot up! But...there is no space left for it to grow, as Notepad is snuggled at its bottom. So, again, all processes has to move below until VLC has found sufficient space!
Problem 4: If processes needs to grow, it will be a very expensive operation
Fine. Now suppose, Photos is being used to load some photos from an external hard disk. Accessing hard-disk takes you from the realm of caches and RAM to that of disk, which is slower by orders of magnitudes. Painfully, irrevocably, transcendentally slower. It is an I/O operation, which means it is not CPU bound (it is rather the exact opposite), which means it does not need to occupy RAM right now. However, it still occupies RAM stubbornly. If you want to launch Firefox in the meantime, you can't, because there is not much memory available, whereas if Photos was taken out of memory for the duration of its I/O bound activity, it would have freed lot of memory, followed by (expensive) compaction, followed by Firefox fitting in.
Problem 5: I/O bound jobs keep on occupying RAM, leading to under-utilization of RAM, which could have been used by CPU bound jobs in the meantime.
So, as we can see, we have so many problems even with the approach of virtual memory.
There are two approaches to tackle these problems - paging
and segmentation
. Let us discuss paging
. In this approach, the virtual address space of a process is mapped to the physical memory in chunks - called pages
. A typical page
size is 4 kB
. The mapping is maintained by something called a page table
, given a virtual address, all now we have to do is find out which page
the address belong to, then from the page table
, find the corresponding location for that page
in actual physical memory (known as frame
), and given that the offset of the virtual address within the page
is same for the page
as well as the frame
, find out the actual address by adding that offset to the address returned by the page table
. For example:
On the left is the virtual address space of a process. Say the virtual address space requires 40 units of memory. If the physical address space (on the right) had 40 units of memory as well, it would have been possible to map all location from the left to a location on the right, and we would have been so happy. But as ill luck would have it, not only does the physical memory have less (24 here) memory units available, it has to be shared between multiple processes as well! Fine, let's see how we make do with it.
When the process starts, say a memory access request for location 35
is made. Here the page size is 8
(each page
contains 8
locations, the entire virtual address space of 40
locations thus contains 5
pages). So this location belongs to page no. 4
(35/8
). Within this page
, this location has an offset of 3
(35%8
). So this location can be specified by the tuple (pageIndex, offset)
= (4,3)
. This is just the starting, so no part of the process is stored in the actual physical memory yet. So the page table
, which maintains a mapping of the pages on the left to the actual pages on the right (where they are called frames
) is currently empty. So OS relinquishes the CPU, lets a device driver access the disk and fetch the page no. 4
for this process (basically a memory chunk from the program on the disk whose addresses range from 32
to 39
). When it arrives, OS allocates the page somewhere in the RAM, say first frame itself, and the page table
for this process takes note that page 4
maps to frame 0
in the RAM. Now the data is finally there in the physical memory. OS again queries the page table for the tuple (4,3)
, and this time, page table says that page 4
is already mapped to frame 0
in the RAM. So OS simply goes to the 0
th frame in RAM, accesses the data at offset 3
in that frame (Take a moment to understand this. The entire page
, which was fetched from disk, is moved to frame
. So whatever the offset of an individual memory location in a page was, it will be the same in the frame as well, since within the page
/frame
, the memory unit still resides at the same place relatively!), and returns the data! Because the data was not found in memory at first query itself, but rather had to be fetched from disk to be loaded into memory, it constitutes a miss.
Fine. Now suppose, a memory access for location 28
is made. It boils down to (3,4)
. Page table
right now has only one entry, mapping page 4
to frame 0
. So this is again a miss, the process relinquishes the CPU, device driver fetches the page from disk, process regains control of CPU again, and its page table
is updated. Say now the page 3
is mapped to frame 1
in the RAM. So (3,4)
becomes (1,4)
, and the data at that location in RAM is returned. Good. In this way, suppose the next memory access is for location 8
, which translates to (1,0)
. Page 1
is not in memory yet, the same procedure is repeated, and the page
is allocated at frame 2
in RAM. Now the RAM-process mapping looks like the picture above. At this point in time, the RAM, which had only 24 units of memory available, is filled up. Suppose the next memory access request for this process is from address 30
. It maps to (3,6)
, and page table
says that page 3
is in RAM, and it maps to frame 1
. Yay! So the data is fetched from RAM location (1,6)
, and returned. This constitutes a hit, as data required can be obtained directly from RAM, thus being very fast. Similarly, the next few access requests, say for locations 11
, 32
, 26
, 27
all are hits, i.e. data requested by the process is found directly in the RAM without needing to look elsewhere.
Now suppose a memory access request for location 3
comes. It translates to (0,3)
, and page table
for this process, which currently has 3 entries, for pages 1
, 3
and 4
says that this page is not in memory. Like previous cases, it is fetched from disk, however, unlike previous cases, RAM is filled up! So what to do now? Here lies the beauty of virtual memory, a frame from the RAM is evicted! (Various factors govern which frame is to be evicted. It may be LRU
based, where the frame which was least recently accessed for a process is to be evicted. It may be first-come-first-evicted
basis, where the frame which allocated longest time ago, is evicted, etc.) So some frame is evicted. Say frame 1 (just randomly choosing it). However, that frame
is mapped to some page
! (Currently, it is mapped by the page table to page 3
of our one and only one process). So that process has to be told this tragic news, that one frame
, which unfortunate belongs to you, is to be evicted from RAM to make room for another pages
. The process has to ensure that it updates its page table
with this information, that is, removing the entry for that page-frame duo, so that the next time a request is made for that page
, it right tells the process that this page
is no longer in memory, and has to be fetched from disk. Good. So frame 1
is evicted, page 0
is brought in and placed there in the RAM, and the entry for page 3
is removed, and replaced by page 0
mapping to the same frame 1
. So now our mapping looks like this (note the colour change in the second frame
on the right side):
Saw what just happened? The process had to grow, it needed more space than the available RAM, but unlike our earlier scenario where every process in the RAM had to move to accommodate a growing process, here it happened by just one page
replacement! This was made possible by the fact that the memory for a process no longer needs to be contiguous, it can reside at different places in chunks, OS maintains the information as to where they are, and when required, they are appropriately queried. Note: you might be thinking, huh, what if most of the times it is a miss
, and the data has to be constantly loaded from disk into memory? Yes, theoretically, it is possible, but most compilers are designed in such a manner that follows locality of reference
, i.e. if data from some memory location is used, the next data needed will be located somewhere very close, perhaps from the same page
, the page
which was just loaded into memory. As a result, the next miss will happen after quite some time, most of the upcoming memory requirements will be met by the page just brought in, or the pages already in memory which were recently used. The exact same principle allows us to evict the least recently used page
as well, with the logic that what has not been used in a while, is not likely to be used in a while as well. However, it is not always so, and in exceptional cases, yes, performance may suffer. More about it later.
Solution to Problem 4: Processes can now grow easily, if space problem is faced, all it requires is to do a simple
page
replacement, without moving any other process.
Solution to Problem 1: A process can access unlimited memory. When more memory than available is needed, the disk is used as backup, the new data required is loaded into memory from the disk, and the least recently used data
frame
(orpage
) is moved to disk. This can go on infinitely, and since disk space is cheap and virtually unlimited, it gives an illusion of unlimited memory. Another reason for the nameVirtual Memory
, it gives you illusion of memory which is not really available!
Cool. Earlier we were facing a problem where even though a process reduces in size, the empty space is difficult to be reclaimed by other processes (because it would require costly compaction). Now it is easy, when a process becomes smaller in size, many of its pages
are no longer used, so when other processes need more memory, a simple LRU
based eviction automatically evicts those less-used pages
from RAM, and replaces them with the new pages from the other processes (and of course updating the page tables
of all those processes as well as the original process which now requires less space), all these without any costly compaction operation!
Solution to Problem 3: Whenever processes reduce in size, its
frames
in RAM will be less used, so a simpleLRU
based eviction can evict those pages out and replace them withpages
required by new processes, thus avoidingInternal Fragmentation
without need forcompaction
.
As for problem 2, take a moment to understand this, the scenario itself is completely removed! There is no need to move a process to accommodate a new process, because now the entire process never needs to fit at once, only certain pages of it need to fit ad hoc, that happens by evicting frames
from RAM. Everything happens in units of pages
, thus there is no concept of hole
now, and hence no question of anything moving! May be 10 pages
had to be moved because of this new requirement, there are thousands of pages
which are left untouched. Whereas, earlier, all processes (every bit of them) had to be moved!
Solution to Problem 2: To accommodate a new process, data from only less recently used parts of other processes have to be evicted as required, and this happens in fixed size units called
pages
. Thus there is no possibility ofhole
orExternal Fragmentation
with this system.
Now when the process needs to do some I/O operation, it can relinquish CPU easily! OS simply evicts all its pages
from the RAM (perhaps store it in some cache) while new processes occupy the RAM in the meantime. When the I/O operation is done, OS simply restores those pages
to the RAM (of course by replacing the pages
from some other processes, may be from the ones which replaced the original process, or may be from some which themselves need to do I/O now, and hence can relinquish the memory!)
Solution to Problem 5: When a process is doing I/O operations, it can easily give up RAM usage, which can be utilized by other processes. This leads to proper utilization of RAM.
And of course, now no process is accessing the RAM directly. Each process is accessing a virtual memory location, which is mapped to a physical RAM address and maintained by the page-table
of that process. The mapping is OS-backed, OS lets the process know which frame is empty so that a new page for a process can be fitted there. Since this memory allocation is overseen by the OS itself, it can easily ensure that no process encroaches upon the contents of another process by allocating only empty frames from RAM, or upon encroaching upon the contents of another process in the RAM, communicate to the process to update it page-table
.
Solution to Original Problem: There is no possibility of a process accessing the contents of another process, since the entire allocation is managed by the OS itself, and every process runs in its own sandboxed virtual address space.
So paging
(among other techniques), in conjunction with virtual memory, is what powers today's softwares running on OS-es! This frees the software developer from worrying about how much memory is available on the user's device, where to store the data, how to prevent other processes from corrupting their software's data, etc. However, it is of course, not full-proof. There are flaws:
Paging
is, ultimately, giving user the illusion of infinite memory by using disk as secondary backup. Retrieving data from secondary storage to fit into memory (called page swap
, and the event of not finding the desired page in RAM is called page fault
) is expensive as it is an IO operation. This slows down the process. Several such page swaps happen in succession, and the process becomes painfully slow. Ever seen your software running fine and dandy, and suddenly it becomes so slow that it nearly hangs, or leaves you with no option that to restart it? Possibly too many page swaps were happening, making it slow (called thrashing
).So coming back to OP,
Why do we need the virtual memory for executing a process? - As the answer explains at length, to give softwares the illusion of the device/OS having infinite memory, so that any software, big or small, can be run, without worrying about memory allocation, or other processes corrupting its data, even when running in parallel. It is a concept, implemented in practice through various techniques, one of which, as described here, is Paging. It may also be Segmentation.
Where does this virtual memory stand when the process (program) from the external hard drive is brought to the main memory (physical memory) for the execution? - Virtual memory doesn't stand anywhere per se, it is an abstraction, always present, when the software/process/program is booted, a new page table is created for it, and it contains the mapping from the addresses spat out by that process to the actual physical address in RAM. Since the addresses spat out by the process are not real addresses, in one sense, they are, actually, what you can say, the virtual memory
.
Who takes care of the virtual memory and what is the size of the virtual memory? - It is taken care of by, in tandem, the OS and the software. Imagine a function in your code (which eventually compiled and made into the executable that spawned the process) which contains a local variable - an int i
. When the code executes, i
gets a memory address within the stack of the function. That function is itself stored as an object somewhere else. These addresses are compiler generated (the compiler which compiled your code into the executable) - virtual addresses. When executed, i
has to reside somewhere in actual physical address for duration of that function at least (unless it is a static variable!), so OS maps the compiler generated virtual address of i
into an actual physical address, so that whenever, within that function, some code requires the value of i
, that process can query the OS for that virtual address, and OS in turn can query the physical a
If you're looking for a Facebook like scroll bar, then I'd highly recommend you take a look at this one:
you should add python to your PATH during installation of python...after installation.. open cmd prompt type command-pip install nltk
then go to IDLE and open a new file..save it as file.py..then open file.py
type the following:
import nltk
nltk.download()
You cannot insert data because you have a quota of 0 on the tablespace. To fix this, run
ALTER USER <user> quota unlimited on <tablespace name>;
or
ALTER USER <user> quota 100M on <tablespace name>;
as a DBA user (depending on how much space you need / want to grant).
just had the same problem, however this was the simplest solution:
<?php (date('Y')+1).date('-m-d'); ?>
In some cases you just need to update the include
array.
{
"compilerOptions": {
"target": "es6",
"module": "commonjs",
"moduleResolution": "node",
"outDir": "dist",
"sourceMap": false,
"baseUrl": ".",
"paths": {
"@/*": ["src/*"]
}
},
"include": ["src/**/*.ts", "tests/**/*.ts"],
"exclude": ["node_modules", ".vscode"]
}
They are the same, but in C++ there's a good reason to always use const on the right. You'll be consistent everywhere because const member functions must be declared this way:
int getInt() const;
It changes the this
pointer in the function from Foo * const
to Foo const * const
. See here.
Here is some SQL that actually make sense:
SELECT m.id FROM match m LEFT JOIN email e ON e.id = m.id WHERE e.id IS NULL
Simple is always better.
go to c->users->[Your user account]-> remove android 1.2 and restart the android studio when it ask to import select first radio button which is import setting from previous config
there you go fixed
HTML:
<ul>
<li onclick="myfunction(this)">
<span></span>
<p>This Text</p>
</li>
</ul>?
JavaScript:
function myfunction(foo) {
var elem = foo.getElementsByTagName('p');
var TextInsideLi = elem[0].innerHTML;
}?
You have empty $entry_database
variable. As you see in error: ListEmail, Title FROM WHERE ID
bewteen FROM and WHERE should be name of table. Proper syntax of SELECT:
SELECT columns FROM table [optional things as WHERE/ORDER/GROUP/JOIN etc]
which in your way should become:
SELECT ID, ListStID, ListEmail, Title FROM some_table_you_got WHERE ID = '4'
Agree with Jewes, XmlReader is the better way to go, especially if working with a larger XML document or processing multiple in a loop - no need to parse the entire document if you only need the document root.
Here's a simplified version, using XmlReader and MoveToContent().
http://msdn.microsoft.com/en-us/library/system.xml.xmlreader.movetocontent.aspx
using (XmlReader xmlReader = XmlReader.Create(p_fileName))
{
if (xmlReader.MoveToContent() == XmlNodeType.Element)
rootNodeName = xmlReader.Name;
}
As of C# 7 you could also use this:
if (clientsParsed["objects"] is JArray clients)
{
foreach (JObject item in clients.Children())
{
if (item["thisParameter"] as JToken itemToken)
{
command.Parameters["@MyParameter"].Value = JTokenToSql(itemToken);
}
}
}
The is Operator checks the Type and if its corrects the Value is inside the clients variable.
According to the ant manual, setting JAVA_HOME should work - are you sure the changed setting is visible to ant?
Alternatively, you could use the JAVACMD variable.
Refer below code for formatting date
long strDate1 = 1346524199000;
Date date=new Date(strDate1);
try {
SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");
SimpleDateFormat df2 = new SimpleDateFormat("dd/MM/yy");
date = df2.format(format.parse("yourdate");
} catch (java.text.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
You don't have to add you own click
event handler at all. Just initialize the element with fancybox:
$(function() {
$('a[href="#modalMine"]').fancybox({
'autoScale': true,
'transitionIn': 'elastic',
'transitionOut': 'elastic',
'speedIn': 500,
'speedOut': 300,
'autoDimensions': true,
'centerOnScroll': true // as MattBall already said, remove the comma
});
});
Done. Fancybox already binds a click
handler that opens the box. Have a look at the HowTo section.
Later if you want to open the box programmatically, raise the click
event on that element:
$('a[href="#modalMine"]').click();
An example:
log4j.rootLogger=ERROR, logfile
log4j.appender.logfile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.logfile.datePattern='-'dd'.log'
log4j.appender.logfile.File=log/radius-prod.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%-6r %d{ISO8601} %-5p %40.40c %x - %m\n
log4j.logger.foo.bar.Baz=DEBUG, myappender
log4j.additivity.foo.bar.Baz=false
log4j.appender.myappender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.myappender.datePattern='-'dd'.log'
log4j.appender.myappender.File=log/access-ext-dmz-prod.log
log4j.appender.myappender.layout=org.apache.log4j.PatternLayout
log4j.appender.myappender.layout.ConversionPattern=%-6r %d{ISO8601} %-5p %40.40c %x - %m\n
Try this:
myfile %>% mutate(V5 = (V1 == 1 & V2 != 4) + 2 * (V2 == 4 & V3 != 1))
giving:
V1 V2 V3 V4 V5
1 1 2 3 5 1
2 2 4 4 1 2
3 1 4 1 1 0
4 4 5 1 3 0
5 5 5 5 4 0
or this:
myfile %>% mutate(V5 = ifelse(V1 == 1 & V2 != 4, 1, ifelse(V2 == 4 & V3 != 1, 2, 0)))
giving:
V1 V2 V3 V4 V5
1 1 2 3 5 1
2 2 4 4 1 2
3 1 4 1 1 0
4 4 5 1 3 0
5 5 5 5 4 0
Suggest you get a better name for your data frame. myfile makes it seem as if it holds a file name.
Above used this input:
myfile <-
structure(list(V1 = c(1L, 2L, 1L, 4L, 5L), V2 = c(2L, 4L, 4L,
5L, 5L), V3 = c(3L, 4L, 1L, 1L, 5L), V4 = c(5L, 1L, 1L, 3L, 4L
)), .Names = c("V1", "V2", "V3", "V4"), class = "data.frame", row.names = c("1",
"2", "3", "4", "5"))
Update 1 Since originally posted dplyr has changed %.%
to %>%
so have modified answer accordingly.
Update 2 dplyr now has case_when
which provides another solution:
myfile %>%
mutate(V5 = case_when(V1 == 1 & V2 != 4 ~ 1,
V2 == 4 & V3 != 1 ~ 2,
TRUE ~ 0))
This is also easy to read:
FilePath=(
"/tmp/path1/" #FilePath[0]
"/tmp/path2/" #FilePath[1]
)
#Loop
for Path in "${FilePath[@]}"
do
echo "$Path"
done
Following worked for me and it seems very simple as well:
Let's assume that we want to import a script ./data/get_my_file.py and want to access get_set1() function in it.
import sys
sys.path.insert(0, './data/')
import get_my_file as db
print (db.get_set1())
As of Android studio 3.4, You need to put this line in your Layout which holds the RecyclerView
.
app:layout_behavior="android.support.design.widget.AppBarLayout$ScrollingViewBehavior"
I got this error for my Linux Jenkins slave. I fixed it by changing from the node from "Known hosts file Verification Strategy" to "Non verifying Verification Strategy".
Use this method.. and modify it according to ur view names. This code works great.
private boolean validateMobilenumber() {
if (mobilenumber.getText().toString().trim().isEmpty() || mobilenumber.getText().toString().length() < 10) {
input_layout_mobilenumber.setErrorEnabled(true);
input_layout_mobilenumber.setError(getString(R.string.err_msg_mobilenumber));
// requestFocus(mobilenumber);
return false;
} else {
input_layout_mobilenumber.setError(null);
input_layout_mobilenumber.setErrorEnabled(false);
mobilenumber.setBackground(mobilenumber.getBackground().getConstantState().newDrawable());
}
yqritc's RecyclerView-FlexibleDivider makes this a one liner. First add this to your build.gradle
:
compile 'com.yqritc:recyclerview-flexibledivider:1.4.0' // requires jcenter()
Now you can configure and add a divder where you set your recyclerView's adapter:
recyclerView.setAdapter(myAdapter);
recyclerView.addItemDecoration(new HorizontalDividerItemDecoration.Builder(this).color(Color.RED).sizeResId(R.dimen.divider).marginResId(R.dimen.leftmargin, R.dimen.rightmargin).build());
From the documentation:
With one argument, return the natural logarithm of x (to base e).
With two arguments, return the logarithm of x to the given base, calculated as
log(x)/log(base)
.
But the log10 is made available as math.log10()
, which does not resort to log division if possible.
Actually, there is a formal way to combine and it is like below:
<View style={[style01, style02]} />
But, there is a small issue, if one of them is passed by the parent component and it was created by a combined formal way we have a big problem:
// The passing style02 from props: [parentStyle01, parentStyle02]
// Now:
<View style={[style01, [parentStyle01, parentStyle02]]} />
And this last line causes to have UI bug, surly, React Native cannot deal with a deep array inside an array. So I create my helper function:
import { StyleSheet } from 'react-native';
const styleJoiner = (...arg) => StyleSheet.flatten(arg);
By using my styleJoiner
anywhere you can combine any type of style and combine styles. even undefined
or other useless types don't cause to break the styling.
You need to check your relative path, based on depth of your modules from parent if module is just below parent then in module put relative path as: ../pom.xml
if its 2 level down then ../../pom.xml
The problem with your code is in the line:
for(i in length(namevector))
You need to ask yourself: what is length(namevector)
? It's one number. So essentially you're saying:
for(i in 11)
df[,i] <- NA
Or more simply:
df[,11] <- NA
That's why you're getting an error. What you want is:
for(i in namevector)
df[,i] <- NA
Or more simply:
df[,namevector] <- NA
There's no fixed time for retransmission. Simple implementations estimate the RTT (round-trip-time) and if no ACK to send data has been received in 2x that time then they re-send.
They then double the wait-time and re-send once more if again there is no reply. Rinse. Repeat.
More sophisticated systems make better estimates of how long it should take for the ACK as well as guesses about exactly which data has been lost.
The bottom-line is that there is no hard-and-fast rule about exactly when to retransmit. It's up to the implementation. All retransmissions are triggered solely by the sender based on lack of response from the receiver.
TCP never drops data so no, there is no way to indicate a server should forget about some segment.
If your variable data1$c
is a factor, it's more efficient to change the labels of the factor levels than to create a new vector of characters:
levels(data1$c) <- sub("_", "-", levels(data1$c))
a b c
1 0.73945260 a A-B
2 0.75998815 b A-B
3 0.19576725 c A-B
4 0.85932140 d A-B
5 0.80717115 e A-C
6 0.09101492 f A-C
7 0.10183586 g A-C
8 0.97742424 h A-C
9 0.21364521 i A-C
10 0.02389782 j A-C
You array is being allocated on the stack in this case attempt to allocate an array of the same size using alloc.
It looks like not.
Put a breakpoint, when it stops switch to the console, try to set the variable. It does not error when you assign it a different value, but if you read it after the assignment, it's unmodified. :-/
What you call "Two-Way SSL" is usually called TLS/SSL with client certificate authentication.
In a "normal" TLS connection to example.com only the client verifies that it is indeed communicating with the server for example.com. The server doesn't know who the client is. If the server wants to authenticate the client the usual thing is to use passwords, so a client needs to send a user name and password to the server, but this happens inside the TLS connection as part of an inner protocol (e.g. HTTP) it's not part of the TLS protocol itself. The disadvantage is that you need a separate password for every site because you send the password to the server. So if you use the same password on for example PayPal and MyPonyForum then every time you log into MyPonyForum you send this password to the server of MyPonyForum so the operator of this server could intercept it and try it on PayPal and can issue payments in your name.
Client certificate authentication offers another way to authenticate the client in a TLS connection. In contrast to password login, client certificate authentication is specified as part of the TLS protocol. It works analogous to the way the client authenticates the server: The client generates a public private key pair and submits the public key to a trusted CA for signing. The CA returns a client certificate that can be used to authenticate the client. The client can now use the same certificate to authenticate to different servers (i.e. you could use the same certificate for PayPal and MyPonyForum without risking that it can be abused). The way it works is that after the server has sent its certificate it asks the client to provide a certificate too. Then some public key magic happens (if you want to know the details read RFC 5246) and now the client knows it communicates with the right server, the server knows it communicates with the right client and both have some common key material to encrypt and verify the connection.
am assuming that you want to know how to format numbers in SSRS
Just right click
the TextBox
on which you want to apply formatting, go to its expression
.
suppose its expression is something like below
=Fields!myField.Value
then do this
=Format(Fields!myField.Value,"##.##")
or
=Format(Fields!myFields.Value,"00.00")
difference between the two is that former one would make 4 as 4 and later one would make 4 as 04.00
this should give you an idea.
also: you might have to convert your field into a numerical one. i.e.
=Format(CDbl(Fields!myFields.Value),"00.00")
so: 0 in format expression means, when no number is present, place a 0 there and # means when no number is present, leave it. Both of them works same when numbers are present ie. 45.6567 would be 45.65 for both of them:
UPDATE :
if you want to apply variable formatting on the same column based on row values i.e.
you want myField
to have no formatting when it has no decimal value but formatting with double precision when it has decimal then you can do it through logic. (though you should not be doing so)
Go to the appropriate textbox and go to its expression and do this:
=IIF((Fields!myField.Value - CInt(Fields!myField.Value)) > 0,
Format(Fields!myField.Value, "##.##"),Fields!myField.Value)
so basically you are using IIF(condition, true,false)
operator of SSRS,
ur condition is to check whether the number has decimal value, if it has, you apply the formatting and if no, you let it as it is.
this should give you an idea, how to handle variable formatting.
I finally solved this by creating a second object that imitates B.
My schema now looks like this:
I now have B1 (within parent of A) and B2 outside of it.
B1 and B2 are right next to one another, so to the naked eye it looks as if it's just 1 object.
In short, @classmethod turns a normal method to a factory method.
Let's explore it with an example:
class PythonBook:
def __init__(self, name, author):
self.name = name
self.author = author
def __repr__(self):
return f'Book: {self.name}, Author: {self.author}'
Without a @classmethod,you should labor to create instances one by one and they are scattered.
book1 = PythonBook('Learning Python', 'Mark Lutz')
In [20]: book1
Out[20]: Book: Learning Python, Author: Mark Lutz
book2 = PythonBook('Python Think', 'Allen B Dowey')
In [22]: book2
Out[22]: Book: Python Think, Author: Allen B Dowey
As for example with @classmethod
class PythonBook:
def __init__(self, name, author):
self.name = name
self.author = author
def __repr__(self):
return f'Book: {self.name}, Author: {self.author}'
@classmethod
def book1(cls):
return cls('Learning Python', 'Mark Lutz')
@classmethod
def book2(cls):
return cls('Python Think', 'Allen B Dowey')
Test it:
In [31]: PythonBook.book1()
Out[31]: Book: Learning Python, Author: Mark Lutz
In [32]: PythonBook.book2()
Out[32]: Book: Python Think, Author: Allen B Dowey
See? Instances are successfully created inside a class definition and they are collected together.
In conclusion, @classmethod decorator convert a conventional method to a factory method,Using classmethods makes it possible to add as many alternative constructors as necessary.
To open the google maps app in android:-
geo:<lat>,<lng>?z=<zoom>
open app with marker for give location:-
geo:<lat>,<lng>?q=<lat>,<lng>(Label,Name)
open google map in ios:-
comgooglemaps://?q=<lat>,<lng>
open google maps in browser with following parameters:-
http://maps.google.com/maps?z=12&t=m&q=<lat>,<lng>
z
is the zoom level (1-21)t
is the map type ("m" map, "k" satellite, "h" hybrid, "p" terrain, "e" GoogleEarth)q
is the search queryO(log N)
basically means time goes up linearly while the n
goes up exponentially. So if it takes 1
second to compute 10
elements, it will take 2
seconds to compute 100
elements, 3
seconds to compute 1000
elements, and so on.
?It is O(log n)
when we do divide and conquer type of algorithms e.g binary search. Another example is quick sort where each time we divide the array into two parts and each time it takes O(N)
time to find a pivot element. Hence it N O(log N)
It's possible but no heap allocation allowed directly. Heap allocation is performed at runtime. Here are a few examples:
static SOME_INT: i32 = 5;
static SOME_STR: &'static str = "A static string";
static SOME_STRUCT: MyStruct = MyStruct {
number: 10,
string: "Some string",
};
static mut db: Option<sqlite::Connection> = None;
fn main() {
println!("{}", SOME_INT);
println!("{}", SOME_STR);
println!("{}", SOME_STRUCT.number);
println!("{}", SOME_STRUCT.string);
unsafe {
db = Some(open_database());
}
}
struct MyStruct {
number: i32,
string: &'static str,
}
Like @BillKotsias, I used inheritance, and it worked for me.
I changed this mess (which required all the boost headers in my declaration *.h)
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/mean.hpp>
#include <boost/accumulators/statistics/moment.hpp>
#include <boost/accumulators/statistics/min.hpp>
#include <boost/accumulators/statistics/max.hpp>
typedef boost::accumulators::accumulator_set<float,
boost::accumulators::features<
boost::accumulators::tag::median,
boost::accumulators::tag::mean,
boost::accumulators::tag::min,
boost::accumulators::tag::max
>> VanillaAccumulator_t ;
std::unique_ptr<VanillaAccumulator_t> acc;
into this declaration (*.h)
class VanillaAccumulator;
std::unique_ptr<VanillaAccumulator> acc;
and the implementation (*.cpp) was
#include <boost/accumulators/accumulators.hpp>
#include <boost/accumulators/statistics.hpp>
#include <boost/accumulators/statistics/stats.hpp>
#include <boost/accumulators/statistics/mean.hpp>
#include <boost/accumulators/statistics/moment.hpp>
#include <boost/accumulators/statistics/min.hpp>
#include <boost/accumulators/statistics/max.hpp>
class VanillaAccumulator : public
boost::accumulators::accumulator_set<float,
boost::accumulators::features<
boost::accumulators::tag::median,
boost::accumulators::tag::mean,
boost::accumulators::tag::min,
boost::accumulators::tag::max
>>
{
};
NOTE if you are using python 3.x:
request.FILES
is a multivalue dictionary like object that keeps the files uploaded through an upload file button. Say in your html code the name of the button (type="file") is "myfile" so "myfile" will be the key in this dictionary. If you uploaded one file, then the value for this key will be only one and if you uploaded multiple files, then you will have multiple values for that specific key. If you use request.FILES['myfile']
you will get the first or last value (I cannot say for sure). This is fine if you only uploaded one file, but if you want to get all files you should do this:
list=[] #myfile is the key of a multi value dictionary, values are the uploaded files
for f in request.FILES.getlist('myfile'): #myfile is the name of your html file button
filename = f.name
list.append(filename)
of course one can squeeze the whole thing in one line, but this is easy to understand
One way is to setup a chroot environment. Debian has a number of tools for that, for example debootstrap
Use HTML Form "elements" attribute:
$.each($("form").elements, function(){
console.log($(this));
});
Now it's not necessary to provide such names as "input, textarea, select ..." etc.
private class GoogleShortenedURLResponse
{
public string id { get; set; }
public string kind { get; set; }
public string longUrl { get; set; }
}
private class GoogleShortenedURLRequest
{
public string longUrl { get; set; }
}
public ActionResult Index1()
{
return View();
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult ShortenURL(string longurl)
{
string googReturnedJson = string.Empty;
JavaScriptSerializer javascriptSerializer = new JavaScriptSerializer();
GoogleShortenedURLRequest googSentJson = new GoogleShortenedURLRequest();
googSentJson.longUrl = longurl;
string jsonData = javascriptSerializer.Serialize(googSentJson);
byte[] bytebuffer = Encoding.UTF8.GetBytes(jsonData);
WebRequest webreq = WebRequest.Create("https://www.googleapis.com/urlshortener/v1/url");
webreq.Method = WebRequestMethods.Http.Post;
webreq.ContentLength = bytebuffer.Length;
webreq.ContentType = "application/json";
using (Stream stream = webreq.GetRequestStream())
{
stream.Write(bytebuffer, 0, bytebuffer.Length);
stream.Close();
}
using (HttpWebResponse webresp = (HttpWebResponse)webreq.GetResponse())
{
using (Stream dataStream = webresp.GetResponseStream())
{
using (StreamReader reader = new StreamReader(dataStream))
{
googReturnedJson = reader.ReadToEnd();
}
}
}
//GoogleShortenedURLResponse googUrl = javascriptSerializer.Deserialize<googleshortenedurlresponse>(googReturnedJson);
//ViewBag.ShortenedUrl = googUrl.id;
return View();
}
This is using what leech talked about, but making it work for IE (IE doesn't support matches):
function closest(el, selector, stopSelector) {
var retval = null;
while (el) {
if (el.className.indexOf(selector) > -1) {
retval = el;
break
} else if (stopSelector && el.className.indexOf(stopSelector) > -1) {
break
}
el = el.parentElement;
}
return retval;
}
It's not perfect, but it works if the selector is unique enough so it won't accidentally match the incorrect element.
I had the same problem. The problem is a bug in MSIE 10, so telling people to fix their issues isn't helpful. Neither is telling visitors to your site to add your site to compatibility view, bleh. In my case, the problem was that the following code displayed no text:
document.write ('<P>');
document.write ('Blah, blah, blah... ');
document.write ('</P>');
After much trial and error, I determined that removing the <P> and </P> tags caused the text to appear properly on the page (thus, the problem IS with document mode rather than browser mode, at least in my case). Removing the <P> tags when userAgent is MSIE is not a "fix" I want to put into my pages.
The solution, as others have said, is:
<!DOCTYPE HTML whatever doctype you're using....>
<HTML>
<HEAD>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8">
<TITLE>Blah...
Yes, the meta tag has to be the FIRST tag after HEAD.
Unfortunately, the meaning of things like ( and \( are swapped between Emacs style regular expressions and most other styles. So if you try to escape these you may be doing the opposite of what you want.
So you really have to know what style you are trying to quote.
As stated in the documentation of Spyder, you need to install PyQt5
first.
Open a Command Prompt as Administrator, then run:
pip install pyqt5
pip install spyder
Then you can find the spyder3.exe
in the Python3.6/Scripts folder. You can also make a shortcut to it. No need for Anaconda.
The relevant files and references can be found here:
http://msdn.microsoft.com/en-us/library/cc283981.aspx
Note the links off it about implementation/etc.
By default transaction propagation is REQUIRED, meaning that the same transaction will propagate from a transactional caller to transactional callee. In this case also the read-only status will propagate. E.g. if a read-only transaction will call a read-write transaction, the whole transaction will be read-only.
Could you use the Open Session in View pattern to allow lazy loading? That way your handle method does not need to be transactional at all.
You need to add the source from where you're loading the data.
For Example:
$("#step1Content").load("yourpage.html");
Hope It will help you.
Just type this command in your command line:
python manage.py changepassword yourusername
you can use this in terminal or shell
adb shell install -g MyApp.apk
see more in develope google
You can easily add multiple classes to divs... So:
<div class="myclass myclass-one"></div>
<div class="myclass myclass-two"></div>
<div class="myclass myclass-three"></div>
Then in the CSS call to the share class to apply the same styles:
.myclass {...}
And you can still use your other classes like this:
.myclass-three {...}
Or if you want to be more specific in the CSS like this:
.myclass.myclass-three {...}
Here's the quote on AssemblyInfo.cs from MSDN:
You can specify all the values or you can accept the default build number, revision number, or both by using an asterisk (). For example, [assembly:AssemblyVersion("2.3.25.1")] indicates 2 as the major version, 3 as the minor version, 25 as the build number, and 1 as the revision number. A version number such as [assembly:AssemblyVersion("1.2.")] specifies 1 as the major version, 2 as the minor version, and accepts the default build and revision numbers. A version number such as [assembly:AssemblyVersion("1.2.15.*")] specifies 1 as the major version, 2 as the minor version, 15 as the build number, and accepts the default revision number. The default build number increments daily. The default revision number is random
This effectively says, if you put a 1.1.* into assembly info, only build number will autoincrement, and it will happen not after every build, but daily. Revision number will change every build, but randomly, rather than in an incrementing fashion.
This is probably enough for most use cases. If that's not what you're looking for, you're stuck with having to write a script which will autoincrement version # on pre-build step
Using a custom Swift view in an Objective-C view controller (yes, even after importing the <<PROJECT NAME>>-Swift.h
file), I'd tried to load the nib using:
MyCustomView *customView = [[[NSBundle mainBundle] loadNibNamed:NSStringFromClass([MyCustomView class]) owner:self options:nil] objectAtIndex:0];
...but NSStringFromClass([MyCustomView class])
returns <<PROJECT NAME>>.MyCustomView
and the load fails. TL;DR All worked well loading the nib using a string literal:
MyCustomView *customView = [[[NSBundle mainBundle] loadNibNamed:@"MyCustomView" owner:self options:nil] objectAtIndex:0];
When you create a cookie via PHP die Default Value is 0, from the manual:
If set to 0, or omitted, the cookie will expire at the end of the session (when the browser closes)
Otherwise you can set the cookies lifetime in seconds as the third parameter:
http://www.php.net/manual/en/function.setcookie.php
But if you mean to get the remaining lifetime of an already existing cookie, i fear that, is not possible (at least not in a direct way).
C++11 N3337 standard draft
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf
19.3 Assertions
1 The header <cassert>, described in (Table 42), provides a macro for documenting C ++ program assertions and a mechanism for disabling the assertion checks.
2 The contents are the same as the Standard C library header <assert.h>.
C99 N1256 standard draft
http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1256.pdf
7.2 Diagnostics <assert.h>
1 The header
<assert.h>
defines the assert macro and refers to another macro,NDEBUG
which is not defined by<assert.h>
. IfNDEBUG
is defined as a macro name at the point in the source file where <assert.h> is included, the assert macro is defined simply as#define assert(ignore) ((void)0)
The assert macro is redefined according to the current state of NDEBUG each time that
<assert.h>
is included.2. The assert macro shall be implemented as a macro, not as an actual function. If the macro definition is suppressed in order to access an actual function, the behavior is undefined.
7.2.1 Program diagnostics
7.2.1.1 The assert macro
Synopsis
1.
#include <assert.h> void assert(scalar expression);
Description
2 The assert macro puts diagnostic tests into programs; it expands to a void expression. When it is executed, if expression (which shall have a scalar type) is false (that is, compares equal to 0), the assert macro writes information about the particular call that failed (including the text of the argument, the name of the source file, the source line number, and the name of the enclosing function — the latter are respectively the values of the preprocessing macros
__FILE__
and__LINE__
and of the identifier__func__
) on the standard error stream in an implementation-defined format. 165) It then calls the abort function.Returns
3 The assert macro returns no value.
All it takes is a bit of XAML...
<Window x:Class="WCSamples.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Window.CommandBindings>
<CommandBinding Command="ApplicationCommands.Close"
Executed="CloseCommandHandler"/>
</Window.CommandBindings>
<StackPanel Name="MainStackPanel">
<Button Command="ApplicationCommands.Close"
Content="Close Window" />
</StackPanel>
</Window>
And a bit of C#...
private void CloseCommandHandler(object sender, ExecutedRoutedEventArgs e)
{
this.Close();
}
(adapted from this MSDN article)
The example creates a list of named lists in a loop.
MyList <- list()
for (aName in c("name1", "name2")){
MyList[[aName]] <- list(aName)
}
MyList[["name1"]]
MyList[["name2"]]
To add another list named "name3" do write:
MyList$name3 <- list(1, 2, 3)
The format you need is:
'2007-01-01 10:00:00'
i.e. yyyy-MM-dd HH:mm:ss
If possible, however, use a parameterised query as this frees you from worrying about the formatting details.
&&
lets you do something based on whether the previous command completed successfully - that's why you tend to see it chained as do_something && do_something_else_that_depended_on_something
.
There is a cleaner and ways faster solution than the 'Math.Truncate' approach:
double frac = value % 1;
If all the solutions above don't work, try to :
Add $i = 1; after /* Servers configuration */
in place of $i = 0 in your phpmyadmin config.inc.php file
Running XAMPP on local windows server, my mysql data files are not under the usual install path (C:\Xampp), but on another disk.
So now I have the phpmyadmin tables with the double __ like pma__table... and $i = 1;
I agree with the answers 1 and 2. However, I prefer to specify each library separately. This makes the depencencies clearer in big projects. Yet, there is the danger of mistyping the (case-sensitive) variable names. In that case there is no direct cmake error but some undefined references linker issues later on, which may take some time to resolve. Therefore I use the following cmake function:
function(VerifyVarDefined)
foreach(lib ${ARGV})
if(DEFINED ${lib})
else(DEFINED ${lib})
message(SEND_ERROR "Variable ${lib} is not defined")
endif(DEFINED ${lib})
endforeach()
endfunction(VerifyVarDefined)
For the example mentioned above, this looks like:
VerifyVarDefined(Boost_PROGRAM_OPTIONS_LIBRARY Boost_REGEX_LIBRARY)
target_link_libraries( run ${Boost_PROGRAM_OPTIONS_LIBRARY} ${Boost_REGEX_LIBRARY} )
If I had written "BOOST_PROGRAM_OPTIONS_LIBRARY" there would have been an error triggered by cmake and not much later triggered by the linker.
#include<iostream>
using namespace std;
class employee
{
int idnum;
double salary;
public:
employee(){}
employee(int a,int b)
{
idnum=a;
salary=b;
}
void dis()
{
cout<<"1st emp:"<<endl<<"idnum="<<idnum<<endl<<"salary="<<salary<<endl<<endl;
}
void operator=(employee &emp)
{
idnum=emp.idnum;
salary=emp.salary;
}
void show()
{
cout<<"2nd emp:"<<endl<<"idnum="<<idnum<<endl<<"salary="<<salary<<endl;
}
};
main()
{
int a;
double b;
cout<<"enter id num and salary"<<endl;
cin>>a>>b;
employee e1(a,b);
e1.dis();
employee e2;
e2=e1;
e2.show();
}
I was looking a lot to find a solution for sticy menue with old school JS (without JQuery). So I build small test to play with it. I think it can be helpfull to those looking for solution in js. It needs improvments of unsticking the menue back, and making it more smooth. Also I find a nice solution with JQuery that clones the original div instead of position fixed, its better since the rest of page element dont need to be replaced after fixing. Anyone know how to that with JS ? Please remark, correct and improve.
<!DOCTYPE html>
<html>
<head>
<script>
// addEvent function by John Resig:
// http://ejohn.org/projects/flexible-javascript-events/
function addEvent( obj, type, fn ) {
if ( obj.attachEvent ) {
obj['e'+type+fn] = fn;
obj[type+fn] = function(){obj['e'+type+fn]( window.event );};
obj.attachEvent( 'on'+type, obj[type+fn] );
} else {
obj.addEventListener( type, fn, false );
}
}
function getScrollY() {
var scrOfY = 0;
if( typeof( window.pageYOffset ) == 'number' ) {
//Netscape compliant
scrOfY = window.pageYOffset;
} else if( document.body && document.body.scrollTop ) {
//DOM compliant
scrOfY = document.body.scrollTop;
}
return scrOfY;
}
</script>
<style>
#mydiv {
height:100px;
width:100%;
}
#fdiv {
height:100px;
width:100%;
}
</style>
</head>
<body>
<!-- HTML for example event goes here -->
<div id="fdiv" style="background-color:red;position:fix">
</div>
<div id="mydiv" style="background-color:yellow">
</div>
<div id="fdiv" style="background-color:green">
</div>
<script>
// Script for example event goes here
addEvent(window, 'scroll', function(event) {
var x = document.getElementById("mydiv");
var y = getScrollY();
if (y >= 100) {
x.style.position = "fixed";
x.style.top= "0";
}
});
</script>
</body>
</html>