Using BalusC's suggestion of implementing Collection i can now hide my primefaces p:dataTable
using not empty operator on my dataModel
that extends javax.faces.model.ListDataModel
Code sample:
import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import javax.faces.model.ListDataModel;
import org.primefaces.model.SelectableDataModel;
public class EntityDataModel extends ListDataModel<Entity> implements
Collection<Entity>, SelectableDataModel<Entity>, Serializable {
public EntityDataModel(List<Entity> data) { super(data); }
@Override
public Entity getRowData(String rowKey) {
// In a real app, a more efficient way like a query by rowKey should be
// implemented to deal with huge data
List<Entity> entitys = (List<Entity>) getWrappedData();
for (Entity entity : entitys) {
if (Integer.toString(entity.getId()).equals(rowKey)) return entity;
}
return null;
}
@Override
public Object getRowKey(Entity entity) {
return entity.getId();
}
@Override
public boolean isEmpty() {
List<Entity> entity = (List<Entity>) getWrappedData();
return (entity == null) || entity.isEmpty();
}
// ... other not implemented methods of Collection...
}
Just perform a Windows Search for *.myi files on your local partitions. Period.
As I suspectected, they were located inside a program files folder, instead of using a proper data-only folder like most other database managers do.
Why do a my.ini file search, open it with an editor, look-up the path string, make sure you don't alter the config file (!), and then do a second search? Complicated without a shred of added benefit other than to practice touch typing.
Suppose you are usin Jersey 2.25.1, this worked for me - I am using Apache Tomcat web container:
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.25.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>2.25.1</version>
</dependency>
NB: Replace version with the version you are using
onCreate()
method gets called when activity gets created, and its called only once in whole Activity life cycle.
where as onStart()
is called when activity is stopped... I mean it has gone to background and its onStop()
method is called by the os. onStart()
may be called multiple times in Activity life cycle.More details here
Use vm.$set('varName', value)
. Look for details into Change_Detection_Caveats.
:datetime (8 bytes)
:timestamp (4 bytes)
This Works
function saveBase64AsFile(base64, fileName) {
var link = document.createElement("a");
document.body.appendChild(link);
link.setAttribute("type", "hidden");
link.href = "data:text/plain;base64," + base64;
link.download = fileName;
link.click();
document.body.removeChild(link);
}
Based on the answer above but with some changes
You can use this to fix error:
zcat {address_sql_database(.tar.gz)} | mysql -u root -p {database_name} --binary-mode
It would be better if you just used an AsyncTask running using a Timer something like this
Timer LAIATT = new Timer();
TimerTask LAIATTT = new TimerTask()
{
@Override
public void run()
{
LoadAccountInformationAsyncTask LAIAT = new LoadAccountInformationAsyncTask();
LAIAT.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
};
LAIATT.schedule(LAIATTT, 0, 1000);
i also faced similar issue. I could able to solve this by setting JAVA_HOME in Environment variable in windows. Setting JAVA_HOME in batch file is not working in this case.
As simple as you can use const adults = family.filter(({ age }) => age > 18 );
const family =[{"name":"Jack", "age": 26},_x000D_
{"name":"Jill", "age": 22},_x000D_
{"name":"James", "age": 5 },_x000D_
{"name":"Jenny", "age": 2 }];_x000D_
_x000D_
const adults = family.filter(({ age }) => age > 18 );_x000D_
_x000D_
console.log(adults)
_x000D_
See http://angular-ui.github.io/bootstrap/#/collapse
function CollapseDemoCtrl($scope) {
$scope.isCollapsed = false;
}
<div ng-controller="CollapseDemoCtrl">
<button class="btn" ng-click="isCollapsed = !isCollapsed">Toggle collapse</button>
<hr>
<div collapse="isCollapsed">
<div class="well well-large">Some content</div>
</div>
</div>
Using Javascript, all you need is document.createElement
and setAttribute
.
var input = document.createElement("input");
input.setAttribute('type', 'text');
Then you can use appendChild
to append the created element to the desired parent element.
var parent = document.getElementById("parentDiv");
parent.appendChild(input);
Put i++ somewhere at the end of your loop.
In the above code, the 0 position of the array is overwritten because i is not incremented in each loop.
FYI: the below is doing a redundant search:
if(keys[i].equals(DATE)){
date_value[i] = map.get(keys[i]);
} else if(keys[i].equals(VALUE)){
value_values[i] = map.get(keys[i]);
}
replace with
if(keys[i].equals(DATE)){
date_value[i] = mapping.getValue();
} else if(keys[i].equals(VALUE)){
value_values[i] = mapping.getValue()
}
Another issue is that you are using i
for date_value
and value_values
. This is not valid unless you intend to have null values in your array.
There is no reason to do that. In fact, I would choose to combine declaration and initialization as in
final Boolean isMatch = email1.equals (email2);
using the final
keyword so you can't change it (accidentally) afterwards anymore either.
There are multiple possible causes for this error:
1) When you put the property 'x' inside brackets you are trying to bind to it. Therefore first thing to check is if the property 'x' is defined in your component with an Input()
decorator
Your html file:
<body [x]="...">
Your class file:
export class YourComponentClass {
@Input()
x: string;
...
}
(make sure you also have the parentheses)
2) Make sure you registered your component/directive/pipe classes in NgModule:
@NgModule({
...
declarations: [
...,
YourComponentClass
],
...
})
See https://angular.io/guide/ngmodule#declare-directives for more details about declare directives.
3) Also happens if you have a typo in your angular directive. For example:
<div *ngif="...">
^^^^^
Instead of:
<div *ngIf="...">
This happens because under the hood angular converts the asterisk syntax to:
<div [ngIf]="...">
Well, the problem you have is wrong line ending/encoding for notepad. Notepad uses Windows' line endings - \r\n
and you use \n
.
You should have 64-bit OS on hardware that supports 64-bit OS, 64-bit Apache version and the same for PHP. But this does not guarantee that functions that are work with PDF can use such big sizes of memory. You'd better not load the whole file into memory, split it into chunks or use file functions to seek on it without loading to RAM.
It fires in this order.
=
(exactly)
location = /path
^~
(forward match)
location ^~ /path
~
(regular expression case sensitive)
location ~ /path/
~*
(regular expression case insensitive)
location ~* .(jpg|png|bmp)
/
location /path
string = string.replace(/[&\/\\#,+()$~%.'":*?<>{}]/g,'_');
Alternatively, to change all characters except numbers and letters, try:
string = string.replace(/[^a-zA-Z0-9]/g,'_');
Here is the R version of b-h-'s function, just in case:
measure <- function(lon1,lat1,lon2,lat2) {
R <- 6378.137 # radius of earth in Km
dLat <- (lat2-lat1)*pi/180
dLon <- (lon2-lon1)*pi/180
a <- sin((dLat/2))^2 + cos(lat1*pi/180)*cos(lat2*pi/180)*(sin(dLon/2))^2
c <- 2 * atan2(sqrt(a), sqrt(1-a))
d <- R * c
return (d * 1000) # distance in meters
}
Consider this approach, you don't need a for loop:
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
try
{
// Write from the source to the destination.
bulkCopy.WriteToServer(ExitingSqlTableName);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
No need for a StringBuilder
:
string path = @"c:\hereIAm.txt";
if (!File.Exists(path))
{
// Create a file to write to.
using (StreamWriter sw = File.CreateText(path))
{
sw.WriteLine("Here");
sw.WriteLine("I");
sw.WriteLine("am.");
}
}
But of course you can use the StringBuilder
to create all lines and write them to the file at once.
sw.Write(stringBuilder.ToString());
StreamWriter.Write
Method (String) (.NET Framework 1.1)
pd.to_numeric
with errors='coerce'
# Setup
s = pd.Series(['1', '2', '3', '4', '.'])
s
0 1
1 2
2 3
3 4
4 .
dtype: object
pd.to_numeric(s, errors='coerce')
0 1.0
1 2.0
2 3.0
3 4.0
4 NaN
dtype: float64
If you need the NaN
s filled in, use Series.fillna
.
pd.to_numeric(s, errors='coerce').fillna(0, downcast='infer')
0 1
1 2
2 3
3 4
4 0
dtype: float64
Note, downcast='infer'
will attempt to downcast floats to integers where possible. Remove the argument if you don't want that.
From v0.24+, pandas introduces a Nullable Integer type, which allows integers to coexist with NaNs. If you have integers in your column, you can use
pd.__version__ # '0.24.1' pd.to_numeric(s, errors='coerce').astype('Int32') 0 1 1 2 2 3 3 4 4 NaN dtype: Int32
There are other options to choose from as well, read the docs for more.
DataFrames
If you need to extend this to DataFrames, you will need to apply it to each row. You can do this using DataFrame.apply
.
# Setup.
np.random.seed(0)
df = pd.DataFrame({
'A' : np.random.choice(10, 5),
'C' : np.random.choice(10, 5),
'B' : ['1', '###', '...', 50, '234'],
'D' : ['23', '1', '...', '268', '$$']}
)[list('ABCD')]
df
A B C D
0 5 1 9 23
1 0 ### 3 1
2 3 ... 5 ...
3 3 50 2 268
4 7 234 4 $$
df.dtypes
A int64
B object
C int64
D object
dtype: object
df2 = df.apply(pd.to_numeric, errors='coerce')
df2
A B C D
0 5 1.0 9 23.0
1 0 NaN 3 1.0
2 3 NaN 5 NaN
3 3 50.0 2 268.0
4 7 234.0 4 NaN
df2.dtypes
A int64
B float64
C int64
D float64
dtype: object
You can also do this with DataFrame.transform
; although my tests indicate this is marginally slower:
df.transform(pd.to_numeric, errors='coerce')
A B C D
0 5 1.0 9 23.0
1 0 NaN 3 1.0
2 3 NaN 5 NaN
3 3 50.0 2 268.0
4 7 234.0 4 NaN
If you have many columns (numeric; non-numeric), you can make this a little more performant by applying pd.to_numeric
on the non-numeric columns only.
df.dtypes.eq(object)
A False
B True
C False
D True
dtype: bool
cols = df.columns[df.dtypes.eq(object)]
# Actually, `cols` can be any list of columns you need to convert.
cols
# Index(['B', 'D'], dtype='object')
df[cols] = df[cols].apply(pd.to_numeric, errors='coerce')
# Alternatively,
# for c in cols:
# df[c] = pd.to_numeric(df[c], errors='coerce')
df
A B C D
0 5 1.0 9 23.0
1 0 NaN 3 1.0
2 3 NaN 5 NaN
3 3 50.0 2 268.0
4 7 234.0 4 NaN
Applying pd.to_numeric
along the columns (i.e., axis=0
, the default) should be slightly faster for long DataFrames.
With Vagrant now you can have Docker as a provider. http://docs.vagrantup.com/v2/docker/. Docker provider can be used instead of VirtualBox or VMware.
Please note that you can also use Docker for provisioning with Vagrant. This is very different than using Docker as a provider. http://docs.vagrantup.com/v2/provisioning/docker.html
This means you can replace Chef or Puppet with Docker. You can use combinations like Docker as provider (VM) with Chef as provisioner. Or you can use VirtualBox as provider and Docker as provisioner.
Come on guys, there is no need to loop, just use simple math to solve this equation system:
a*b = i;
a+b = j;
a = j/b;
a = i-b;
j/b = i-b; so:
b + j/b + i = 0
b^2 + i*b + j = 0
From here, its a quadratic equation, and it's trivial to find b (just implement the quadratic equation formula) and from there get the value for a.
EDIT:
There you go:
function finder($add,$product)
{
$inside_root = $add*$add - 4*$product;
if($inside_root >=0)
{
$b = ($add + sqrt($inside_root))/2;
$a = $add - $b;
echo "$a+$b = $add and $a*$b=$product\n";
}else
{
echo "No real solution\n";
}
}
Real live action:
Here is an interesting technique-- I leveraged the startswith procedure as implemented with Django on MySQL to achieve the result of only looking up a datetime through only the date. Basically, when Django does the lookup in the database it has to do a string conversion for the DATETIME MySQL storage object, so you can filter on that, leaving out the timestamp portion of the date-- that way %LIKE% matches only the date object and you'll get every timestamp for the given date.
datetime_filter = datetime(2009, 8, 22)
MyObject.objects.filter(datetime_attr__startswith=datetime_filter.date())
This will perform the following query:
SELECT (values) FROM myapp_my_object \
WHERE myapp_my_object.datetime_attr LIKE BINARY 2009-08-22%
The LIKE BINARY in this case will match everything for the date, no matter the timestamp. Including values like:
+---------------------+
| datetime_attr |
+---------------------+
| 2009-08-22 11:05:08 |
+---------------------+
Hopefully this helps everyone until Django comes out with a solution!
Simple solution which worked for me.
Go to designer.cs file of the form in which you have the grid view and comment the following line: - //this.dataGridView1.AlternatingRowsDefaultCellStyle = dataGridViewCellStyle1;
if you are using vs 2008 or .net framework 3.5 as it will be by default applied to alternating rows.
In my case, it's related to the Toggle Vrapper Icon in the Eclipse.
If you are getting the bold black cursor, then the icon must be enabled. So, click on the Toggle Vrapper Icon to disable. It's located in the Eclipse's Toolbar. Please see the attached image for the clarity.
Why are you sending it through a post if you already have it on the server (PHP) side?
Why not just save the array to the $_SESSION
variable so you can use it when the form gets submitted, that might make it more "secure" since then the client cannot change the variables by editing the source.
It will depend upon how you really want to do.
Click “Default levels” and make sure that "Info" is checked. By default it is only set to show Errors and Warnings
I came here with the same problem :/
Use curly brackets and put all the attributes you want to add inside
Example:
$('#objId').attr({
target: 'nw',
title: 'Opens in a new window'
});
With Recent Symfony 2.6+ versions as a best practice Request is passed as an argument with action in that case you won't need to explicitly call $this->getRequest(), but rather call $request->request->all()
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException;
use Symfony\Component\HttpFoundation\RedirectResponse;
class SampleController extends Controller
{
public function indexAction(Request $request) {
var_dump($request->request->all());
}
}
Here is my solution with reduce and Optional:
private Optional<SimpleImmutableEntry<String, String>> splitKeyValue(String text) {
String[] v = text.split("=");
if (v.length == 1 || v.length == 2) {
String key = URLDecoder.decode(v[0], StandardCharsets.UTF_8);
String value = v.length == 2 ? URLDecoder.decode(v[1], StandardCharsets.UTF_8) : null;
return Optional.of(new SimpleImmutableEntry<String, String>(key, value));
} else
return Optional.empty();
}
private HashMap<String, String> parseQuery(URI uri) {
HashMap<String, String> params = Arrays.stream(uri.getQuery()
.split("&"))
.map(this::splitKeyValue)
.filter(Optional::isPresent)
.map(Optional::get)
.reduce(
// initial value
new HashMap<String, String>(),
// accumulator
(map, kv) -> {
map.put(kv.getKey(), kv.getValue());
return map;
},
// combiner
(a, b) -> {
a.putAll(b);
return a;
});
return params;
}
Optional<SimpleImmutableEntry<String, String>>
to ignore garbage laterIn case you ask, reduce requires this weird combiner in the last parameter, which is only used in parallel streams. Its goal is to merge two intermediate results (here HashMap).
Another way of doing it:
DateTime today = DateTime.Today;
DateTime endOfMonth = new DateTime(today.Year,
today.Month,
DateTime.DaysInMonth(today.Year,
today.Month));
Thanks for the awesome explanation of @Federico A. Ramponi, I just made this in java version. Hope it might be helpful.
Also just as @Konrad Rudolph pointed out, it's actually a double dispatch using two concrete instances together to determine the run-time methods.
So actually there is no need to create a common interface for the operation executor as long as we have the operation interface properly defined.
import static java.lang.System.out;
public class Visitor_2 {
public static void main(String...args) {
Hearen hearen = new Hearen();
FoodImpl food = new FoodImpl();
hearen.showTheHobby(food);
Katherine katherine = new Katherine();
katherine.presentHobby(food);
}
}
interface Hobby {
void insert(Hearen hearen);
void embed(Katherine katherine);
}
class Hearen {
String name = "Hearen";
void showTheHobby(Hobby hobby) {
hobby.insert(this);
}
}
class Katherine {
String name = "Katherine";
void presentHobby(Hobby hobby) {
hobby.embed(this);
}
}
class FoodImpl implements Hobby {
public void insert(Hearen hearen) {
out.println(hearen.name + " start to eat bread");
}
public void embed(Katherine katherine) {
out.println(katherine.name + " start to eat mango");
}
}
As you expect, a common interface will bring us more clarity though it's actually not the essential part in this pattern.
import static java.lang.System.out;
public class Visitor_2 {
public static void main(String...args) {
Hearen hearen = new Hearen();
FoodImpl food = new FoodImpl();
hearen.showHobby(food);
Katherine katherine = new Katherine();
katherine.showHobby(food);
}
}
interface Hobby {
void insert(Hearen hearen);
void insert(Katherine katherine);
}
abstract class Person {
String name;
protected Person(String n) {
this.name = n;
}
abstract void showHobby(Hobby hobby);
}
class Hearen extends Person {
public Hearen() {
super("Hearen");
}
@Override
void showHobby(Hobby hobby) {
hobby.insert(this);
}
}
class Katherine extends Person {
public Katherine() {
super("Katherine");
}
@Override
void showHobby(Hobby hobby) {
hobby.insert(this);
}
}
class FoodImpl implements Hobby {
public void insert(Hearen hearen) {
out.println(hearen.name + " start to eat bread");
}
public void insert(Katherine katherine) {
out.println(katherine.name + " start to eat mango");
}
}
I found this component. https://github.com/jsdf/react-native-htmlview
This component takes HTML content and renders it as native views, with customisable style and handling of links, etc.
$ mkdir -p "$BACKUP_DIR/$client/$year/$month/$day"
Well the only CSS way of doing only background transparency is via RGBa
but since you want to use an image I would suggest using Photoshop or Gimp to make the image transparent and then using it as the background.
You can make another class for doing this kind of activities.
public class Go {
public void Setting(Context context)
{
Intent intent = new Intent(android.provider.Settings.ACTION_SETTINGS);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
}
And for completeness (primarily educational), it is possible without using the len()
function. I would not condone this as a good option DO NOT PROGRAM LIKE THIS IN PYTHON, but it serves a purpose for learning algorithms.
def count(list):
item_count = 0
for item in list[:]:
item_count += 1
return item_count
count([1,2,3,4,5])
(The colon in list[:]
is implicit and is therefore also optional.)
The lesson here for new programmers is: You can’t get the number of items in a list without counting them at some point. The question becomes: when is a good time to count them? For example, high-performance code like the connect system call for sockets (written in C) connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
, does not calculate the length of elements (giving that responsibility to the calling code). Notice that the length of the address is passed along to save the step of counting the length first? Another option: computationally, it might make sense to keep track of the number of items as you add them within the object that you pass. Mind that this takes up more space in memory. See Naftuli Kay‘s answer.
Example of keeping track of the length to improve performance while taking up more space in memory. Note that I never use the len() function because the length is tracked:
class MyList(object):
def __init__(self):
self._data = []
self.length = 0 # length tracker that takes up memory but makes length op O(1) time
# the implicit iterator in a list class
def __iter__(self):
for elem in self._data:
yield elem
def add(self, elem):
self._data.append(elem)
self.length += 1
def remove(self, elem):
self._data.remove(elem)
self.length -= 1
mylist = MyList()
mylist.add(1)
mylist.add(2)
mylist.add(3)
print(mylist.length) # 3
mylist.remove(3)
print(mylist.length) # 2
I'm going to assume you are using Web Site Projects. These automatically crawl their project directory and throw everything into source control. There's no way to stop them.
However, don't despair. Web Application Projects don't exhibit this strange and rather unexpected (imho: moronic) behavior. WAP is an addon on for VS2005 and comes direct with VS2008.
As an alternative to changing your projects to WAP, you might consider moving the Assets folder out of Source control and into a TFS Document Library. Only do this IF the project itself doesn't directly use the assets files.
For read a cookie i've made little modifications of the Miquel version that doesn't work for me:
getCookie(name: string) {
let ca: Array<string> = document.cookie.split(';');
let cookieName = name + "=";
let c: string;
for (let i: number = 0; i < ca.length; i += 1) {
if (ca[i].indexOf(name, 0) > -1) {
c = ca[i].substring(cookieName.length +1, ca[i].length);
console.log("valore cookie: " + c);
return c;
}
}
return "";
From that you can see that calendar.month_name[3]
would return March
, and the array index of 0
is the empty string, so there's no need to worry about zero-indexing either.
At the bottom of this answer is an example of GLSL code which allows to output the full float
value as color, encoding IEEE 754 binary32
. I use it like follows (this snippet gives out yy
component of modelview matrix):
vec4 xAsColor=toColor(gl_ModelViewMatrix[1][1]);
if(bool(1)) // put 0 here to get lowest byte instead of three highest
gl_FrontColor=vec4(xAsColor.rgb,1);
else
gl_FrontColor=vec4(xAsColor.a,0,0,1);
After you get this on screen, you can just take any color picker, format the color as HTML (appending 00
to the rgb
value if you don't need higher precision, and doing a second pass to get the lower byte if you do), and you get the hexadecimal representation of the float
as IEEE 754 binary32
.
Here's the actual implementation of toColor()
:
const int emax=127;
// Input: x>=0
// Output: base 2 exponent of x if (x!=0 && !isnan(x) && !isinf(x))
// -emax if x==0
// emax+1 otherwise
int floorLog2(float x)
{
if(x==0.) return -emax;
// NOTE: there exist values of x, for which floor(log2(x)) will give wrong
// (off by one) result as compared to the one calculated with infinite precision.
// Thus we do it in a brute-force way.
for(int e=emax;e>=1-emax;--e)
if(x>=exp2(float(e))) return e;
// If we are here, x must be infinity or NaN
return emax+1;
}
// Input: any x
// Output: IEEE 754 biased exponent with bias=emax
int biasedExp(float x) { return emax+floorLog2(abs(x)); }
// Input: any x such that (!isnan(x) && !isinf(x))
// Output: significand AKA mantissa of x if !isnan(x) && !isinf(x)
// undefined otherwise
float significand(float x)
{
// converting int to float so that exp2(genType) gets correctly-typed value
float expo=float(floorLog2(abs(x)));
return abs(x)/exp2(expo);
}
// Input: x\in[0,1)
// N>=0
// Output: Nth byte as counted from the highest byte in the fraction
int part(float x,int N)
{
// All comments about exactness here assume that underflow and overflow don't occur
const float byteShift=256.;
// Multiplication is exact since it's just an increase of exponent by 8
for(int n=0;n<N;++n)
x*=byteShift;
// Cut higher bits away.
// $q \in [0,1) \cap \mathbb Q'.$
float q=fract(x);
// Shift and cut lower bits away. Cutting lower bits prevents potentially unexpected
// results of rounding by the GPU later in the pipeline when transforming to TrueColor
// the resulting subpixel value.
// $c \in [0,255] \cap \mathbb Z.$
// Multiplication is exact since it's just and increase of exponent by 8
float c=floor(byteShift*q);
return int(c);
}
// Input: any x acceptable to significand()
// Output: significand of x split to (8,8,8)-bit data vector
ivec3 significandAsIVec3(float x)
{
ivec3 result;
float sig=significand(x)/2.; // shift all bits to fractional part
result.x=part(sig,0);
result.y=part(sig,1);
result.z=part(sig,2);
return result;
}
// Input: any x such that !isnan(x)
// Output: IEEE 754 defined binary32 number, packed as ivec4(byte3,byte2,byte1,byte0)
ivec4 packIEEE754binary32(float x)
{
int e = biasedExp(x);
// sign to bit 7
int s = x<0. ? 128 : 0;
ivec4 binary32;
binary32.yzw=significandAsIVec3(x);
// clear the implicit integer bit of significand
if(binary32.y>=128) binary32.y-=128;
// put lowest bit of exponent into its position, replacing just cleared integer bit
binary32.y+=128*int(mod(float(e),2.));
// prepare high bits of exponent for fitting into their positions
e/=2;
// pack highest byte
binary32.x=e+s;
return binary32;
}
vec4 toColor(float x)
{
ivec4 binary32=packIEEE754binary32(x);
// Transform color components to [0,1] range.
// Division is inexact, but works reliably for all integers from 0 to 255 if
// the transformation to TrueColor by GPU uses rounding to nearest or upwards.
// The result will be multiplied by 255 back when transformed
// to TrueColor subpixel value by OpenGL.
return vec4(binary32)/255.;
}
As this page also lists alternative tools I'll mention xpdf which has command line tools ready compiled for Linux/Windows/Mac. Supports transparency. Is free for commercial use - opposed to Ghostscript which has truly outrageous pricing.
In a test on a huge PDF file it was 7.5% faster than Ghostscript.
(It also has PDF to text and HTML converters)
using "10" for representing a year is not good, because it can be 1910, 1810, etc. You probably should use 4 digits for that.
If you can change the date to something like
yyyymmdd
Then you can use:
// Convert string to date object
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"yyyyMMdd"];
NSDate *date = [dateFormat dateFromString:dateStr];
// Convert date object to desired output format
[dateFormat setDateFormat:@"EEEE MMMM d, YYYY"];
dateStr = [dateFormat stringFromDate:date];
[dateFormat release];
Declare value attribute for input tag (i.e value= {this.state.name}
) and if you want to clear this input vale you have to use this.setState({name : ''})
PFB working code for your reference :
<script type="text/babel">
var StateComponent = React.createClass({
resetName : function(event){
this.setState({
name : ''
});
},
render : function(){
return (
<div>
<input type="text" value= {this.state.name}/>
<button onClick={this.resetName}>Reset</button>
</div>
)
}
});
ReactDOM.render(<StateComponent/>, document.getElementById('app'));
</script>
"Update-Package –reinstall Microsoft.AspNet.WebPages"
Reinstall Microsoft.AspNet.WebPages nuget packages using this command in the package manager console. 100% work!!
It's called the 'ternary' or 'conditional' operator.
Example
The ?: operator can be used as a shortcut for an if...else statement. It is typically used as part of a larger expression where an if...else statement would be awkward. For example:
var now = new Date();
var greeting = "Good" + ((now.getHours() > 17) ? " evening." : " day.");
The example creates a string containing "Good evening." if it is after 6pm. The equivalent code using an if...else statement would look as follows:
var now = new Date();
var greeting = "Good";
if (now.getHours() > 17)
greeting += " evening.";
else
greeting += " day.";
From MSDN JS documentation.
Basically it's a shorthand conditional statement.
Also see:
Try with the following code
View titleView = getWindow().findViewById(android.R.id.title);
if (titleView != null) {
ViewParent parent = titleView.getParent();
if (parent != null && (parent instanceof View)) {
View parentView = (View)parent;
parentView.setBackgroundColor(Color.RED);
}
}
also use this link its very useful : http://nathanael.hevenet.com/android-dev-changing-the-title-bar-background/
if you want to set a selected item when you know the text from drop down list and don't know the value, here is an example:
Say you figured out a timezone and want to set it, but values has time_zone_id
in them.
var timeZone = Intl.DateTimeFormat().resolvedOptions().timeZone;
var $select2 = $('#time-zone');
var selected = $select2.find("option:contains('"+timeZone+"')").val();
$select2.val(selected).trigger('change.select2');
I would prefer (RHEL) - pip download package==version --no-deps --no-binary=:all:
use DateTime.ParseExact
string strDate = "24/01/2013";
DateTime date = DateTime.ParseExact(strDate, "dd/MM/YYYY", null)
null
will use the current culture, which is somewhat dangerous. Try to supply a specific culture
DateTime date = DateTime.ParseExact(strDate, "dd/MM/YYYY", CultureInfo.InvariantCulture)
If you need to do many append operations to build a large string, you can use StringIO or cStringIO. The interface is like a file. ie: you write
to append text to it.
If you're just appending two strings then just use +
.
CMake 3.13 on Ubuntu 16.04
This approach is more flexible because it doesn't constraint MY_VARIABLE to a type:
$ cat CMakeLists.txt
message("MY_VARIABLE=${MY_VARIABLE}")
if( MY_VARIABLE )
message("MY_VARIABLE evaluates to True")
endif()
$ mkdir build && cd build
$ cmake ..
MY_VARIABLE=
-- Configuring done
-- Generating done
-- Build files have been written to: /path/to/build
$ cmake .. -DMY_VARIABLE=True
MY_VARIABLE=True
MY_VARIABLE evaluates to True
-- Configuring done
-- Generating done
-- Build files have been written to: /path/to/build
$ cmake .. -DMY_VARIABLE=False
MY_VARIABLE=False
-- Configuring done
-- Generating done
-- Build files have been written to: /path/to/build
$ cmake .. -DMY_VARIABLE=1
MY_VARIABLE=1
MY_VARIABLE evaluates to True
-- Configuring done
-- Generating done
-- Build files have been written to: /path/to/build
$ cmake .. -DMY_VARIABLE=0
MY_VARIABLE=0
-- Configuring done
-- Generating done
-- Build files have been written to: /path/to/build
.idea/modules.xml
You do not want to remove entire .idea directory, because it contains e.g. dictionaries and shelved changes.
Here's an Add to Calendar service to serve the purpose for adding an event on
The "Add to Calendar" button for events on websites and calendars is easy to install, language independent, time zone and DST compatible. It works perfectly in all modern browsers, tablets and mobile devices, and with Apple Calendar, Google Calendar, Outlook, Outlook.com and Yahoo Calendar.
<div title="Add to Calendar" class="addeventatc">
Add to Calendar
<span class="start">03/01/2018 08:00 AM</span>
<span class="end">03/01/2018 10:00 AM</span>
<span class="timezone">America/Los_Angeles</span>
<span class="title">Summary of the event</span>
<span class="description">Description of the event</span>
<span class="location">Location of the event</span>
</div>
Just in case someone still needs it. The successful, not official, way to rename indexes are:
If you happen to get this error "dangled index directory name is", remove index folder in all master nodes (not data nodes), and restart one of the data nodes.
Beside commands like M-x eval-buffer or M-x load-file you can restart a fresh emacs from the command line:
emacs -q --load "init.el"
Usage example stackoverflow.com/questions/44959535/company-backends-in-gnu-emacs/
Are you using Windows? Just set the environment variable http_proxy...
set http_proxy=http://your-proxy-address.com:port
... and bower will pick this up. Rather than dealing with a unique config file in your project folder - right? (side-note: when-the-F! will windows allow us to create a .file using explorer? c'mon windows!)
If you're trying to load a DataTable
, then leverage the SqlDataAdapter
instead:
DataTable dt = new DataTable();
using (SqlConnection c = new SqlConnection(cString))
using (SqlDataAdapter sda = new SqlDataAdapter(sql, c))
{
sda.SelectCommand.CommandType = CommandType.StoredProcedure;
sda.SelectCommand.Parameters.AddWithValue("@parm1", val1);
...
sda.Fill(dt);
}
You don't even need to define the columns. Just create the DataTable
and Fill
it.
Here, cString
is your connection string and sql
is the stored procedure command.
Let's try.. It is working for me..
svn add * --force
Try following :
$('.expandable-panel-heading').click(function (e) {
if(e.target.nodeName == 'A'){
markActiveLink(e.target)
return;
}else{
alert('123');
}
});
function markActiveLink(el) {
alert($(el).attr("id"));
}
Here is the working demo : http://jsfiddle.net/JVrNc/4/
I do not know of a row limit, but I know tables with more than 170 million rows. You may speed it up using partitioned tables (2005+) or views that connect multiple tables.
I wound up here looking for a solution as well.
Depending on the high-end number of items you need to query against, and assuming your items are unique, you could split your query into batches queries of 1000 items, and combine the results on your end instead (pseudocode here):
//remove dupes
items = items.RemoveDuplicates();
//how to break the items into 1000 item batches
batches = new batch list;
batch = new batch;
for (int i = 0; i < items.Count; i++)
{
if (batch.Count == 1000)
{
batches.Add(batch);
batch.Clear()
}
batch.Add(items[i]);
if (i == items.Count - 1)
{
//add the final batch (it has < 1000 items).
batches.Add(batch);
}
}
// now go query the db for each batch
results = new results;
foreach(batch in batches)
{
results.Add(query(batch));
}
This may be a good trade-off in the scenario where you don't typically have over 1000 items - as having over 1000 items would be your "high end" edge-case scenario. For example, in the event that you have 1500 items, two queries of (1000, 500) wouldn't be so bad. This also assumes that each query isn't particularly expensive in of its own right.
This wouldn't be appropriate if your typical number of expected items got to be much larger - say, in the 100000 range - requiring 100 queries. If so, then you should probably look more seriously into using the global temporary tables solution provided above as the most "correct" solution. Furthermore, if your items are not unique, you would need to resolve duplicate results in your batches as well.
$(document).ready(function(){_x000D_
$("#left").on('click', function (e) {_x000D_
e.stopPropagation();_x000D_
e.preventDefault();_x000D_
$('#left').hide("slide", { direction: "left" }, 500, function () {_x000D_
$('#right').show("slide", { direction: "right" }, 500);_x000D_
});_x000D_
});_x000D_
$("#right").on('click', function (e) {_x000D_
e.stopPropagation();_x000D_
e.preventDefault();_x000D_
$('#right').hide("slide", { direction: "right" }, 500, function () {_x000D_
$('#left').show("slide", { direction: "left" }, 500);_x000D_
});_x000D_
});_x000D_
_x000D_
})
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>_x000D_
_x000D_
<div style="height:100%;width:100%;background:cyan" id="left">_x000D_
<h1>Hello im going left to hide and will comeback from left to show</h1>_x000D_
</div>_x000D_
<div style="height:100%;width:100%;background:blue;display:none" id="right">_x000D_
<h1>Hello im coming from right to sho and will go back to right to hide</h1>_x000D_
</div>
_x000D_
$("#btnOpenEditing").off('click');
$("#btnOpenEditing").on('click', function (e) {
e.stopPropagation();
e.preventDefault();
$('#mappingModel').hide("slide", { direction: "right" }, 500, function () {
$('#fsEditWindow').show("slide", { direction: "left" }, 500);
});
});
It will work like charm take a look at the demo.
I think this method produces very good results:
<!-- Drop Shadow Stack -->
<item>
<shape>
<padding
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
android:left="1dp"/>
<solid android:color="#00CCCCCC"/>
</shape>
</item>
<item>
<shape>
<padding
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
android:left="1dp"/>
<solid android:color="#10CCCCCC"/>
</shape>
</item>
<item>
<shape>
<padding
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
android:left="1dp"/>
<solid android:color="#20CCCCCC"/>
</shape>
</item>
<item>
<shape>
<padding
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
android:left="1dp"/>
<solid android:color="#30CCCCCC"/>
</shape>
</item>
<item>
<shape>
<padding
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
android:left="1dp"/>
<solid android:color="#50CCCCCC"/>
</shape>
</item>
<item>
<shape android:shape="rectangle">
<stroke android:color="#CCC" android:width="1dp"/>
<solid android:color="#FFF" />
<corners android:radius="2dp" />
</shape>
</item>
This issue has been discussed in https://github.com/twbs/bootstrap/issues/10203 By now, there is no plan to change Grid because compatibility reasons.
You can get Bootstrap from this fork, branch hs
: https://github.com/antespi/bootstrap/tree/hs
This branch give you an extra breakpoint at 480px, so yo have to:
Design mobile first is the key to understand Bootstrap 3. This is the major change from BootStrap 2.x. As a rule template you can follow this (in LESS):
.template {
/* rules for mobile vertical (< 480) */
@media (min-width: @screen-hs-min) {
/* rules for mobile horizontal (480 > 768) */
}
@media (min-width: @screen-sm-min) {
/* rules for tablet (768 > 992) */
}
@media (min-width: @screen-md-min) {
/* rules for desktop (992 > 1200) */
}
@media (min-width: @screen-lg-min) {
/* rules for large (> 1200) */
}
}
Additionally, if you have multiple columns to insert and want to check if they exists or not use the following code
Insert Into [Competitors] (cName, cCity, cState)
Select cName, cCity, cState from
(
select new.* from
(
select distinct cName, cCity, cState
from [Competitors] s, [City] c, [State] s
) new
left join
(
select distinct cName, cCity, cState
from [Competitors] s
) existing
on new.cName = existing.cName and new.City = existing.City and new.State = existing.State
where existing.Name is null or existing.City is null or existing.State is null
)
Or you can always map
over an iterator, without the need to build an intermediate list:
>>> _ = map(sys.stdout.write, (x for x in string.letters if x in (y for y in "BigMan on campus")))
acgimnopsuBM
If you check out the subprocess section of the Python docs, you'll notice there is an example of how to replace os.system()
with subprocess.Popen()
:
sts = os.system("mycmd" + " myarg")
...does the same thing as...
sts = Popen("mycmd" + " myarg", shell=True).wait()
The "improved" code looks more complicated, but it's better because once you know subprocess.Popen()
, you don't need anything else. subprocess.Popen()
replaces several other tools (os.system()
is just one of those) that were scattered throughout three other Python modules.
If it helps, think of subprocess.Popen()
as a very flexible os.system()
.
Consider using the MySQL Installer for Windows as it installs and updates the various MySQL products on your system, including MySQL Server, MySQL Workbench, and MySQL Notifier. The Notifier monitors your MySQL instances so you'll know if MySQL is running, and it can also be used to start/stop MySQL.
For <a>
tags:
You need to stick target="_self"
on your <a>
tag
There are three cases where AngularJS will perform a full page reload:
<a href="/ext/link?a=b" target="_self">link</a>
<a href="http://angularjs.org/">link</a>
<a href="/not-my-base/link">link</a>
Using javascript:
The $location
service allows you to change only the URL; it does not allow you to reload the page. When you need to change the URL and reload the page or navigate to a different page, please use a lower level API: $window.location.href
.
See:
Phonegap is pretty slow: clicking a button can take up to 3 sec to display the next screen. iscroll is slow and jumpy.
There other funny bugs and issues that i was able to overcome, but in total - not fully matured.
EDIT: Per Grumpy comment, it is not Phonegap who is actually slow, it is the JS/Browser native engine
Guava's function Maps.transformValues
is what you are looking for, and it works nicely with lambda expressions:
Maps.transformValues(originalMap, val -> ...)
Use this class for encryption. It works.
public class ObjectCrypter {
public static byte[] encrypt(byte[] ivBytes, byte[] keyBytes, byte[] mes)
throws NoSuchAlgorithmException,
NoSuchPaddingException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException, IOException {
AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = null;
cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, newKey, ivSpec);
return cipher.doFinal(mes);
}
public static byte[] decrypt(byte[] ivBytes, byte[] keyBytes, byte[] bytes)
throws NoSuchAlgorithmException,
NoSuchPaddingException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException, IOException, ClassNotFoundException {
AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, newKey, ivSpec);
return cipher.doFinal(bytes);
}
}
And these are ivBytes and a random key;
String key = "e8ffc7e56311679f12b6fc91aa77a5eb";
byte[] ivBytes = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
keyBytes = key.getBytes("UTF-8");
The objects in the std::set
are stored as const StudentT
. So when you try to call getId()
with the const
object the compiler detects a problem, mainly you're calling a non-const member function on const object which is not allowed because non-const member functions make NO PROMISE not to modify the object; so the compiler is going to make a safe assumption that getId()
might attempt to modify the object but at the same time, it also notices that the object is const; so any attempt to modify the const object should be an error. Hence compiler generates an error message.
The solution is simple: make the functions const as:
int getId() const {
return id;
}
string getName() const {
return name;
}
This is necessary because now you can call getId()
and getName()
on const objects as:
void f(const StudentT & s)
{
cout << s.getId(); //now okay, but error with your versions
cout << s.getName(); //now okay, but error with your versions
}
As a sidenote, you should implement operator<
as :
inline bool operator< (const StudentT & s1, const StudentT & s2)
{
return s1.getId() < s2.getId();
}
Note parameters are now const
reference.
In addition to what is said above, you should be very aware that nolock actually imposes the risk of you not getting rows that has been committed before your select.
It worked for me in my Astro Tab A737 Download and install PdaNet+ from http://pdanet.co/a/ in your computer.
follow all steps in the wizard while installing .Once the drivers are installed Android studio should recognize the tablet.
Also, make sure the device is in PTP mode.
Yes, the Map interface will allow you to store Arrays as values. Here's a very simple example:
int[] val = {1, 2, 3};
Map<String, int[]> map = new HashMap<String, int[]>();
map.put("KEY1", val);
Also, depending on your use case you may want to look at the Multimap support offered by guava.
If you would like to check in PHP , then you should do something like :
$query_s =mysql_query("SELECT YOURROWNAME from `YOURTABLENAME` where name = $name");
$ertom=mysql_fetch_array($query_s);
if ('' !== $ertom['YOURROWNAME']) {
//do your action
echo "It was filled";
} else {
echo "it was empty!";
}
Edit .gitconfig file (Probably in your home directory of the user ~) and change the http and https proxy fields to space only
[http]
proxy =
[https]
proxy =
That worked for me in the windows.
As I see it for now I can say that dynamic programming is an extension of divide and conquer paradigm.
I would not treat them as something completely different. Because they both work by recursively breaking down a problem into two or more sub-problems of the same or related type, until these become simple enough to be solved directly. The solutions to the sub-problems are then combined to give a solution to the original problem.
So why do we still have different paradigm names then and why I called dynamic programming an extension. It is because dynamic programming approach may be applied to the problem only if the problem has certain restrictions or prerequisites. And after that dynamic programming extends divide and conquer approach with memoization or tabulation technique.
Let’s go step by step…
As we’ve just discovered there are two key attributes that divide and conquer problem must have in order for dynamic programming to be applicable:
Optimal substructure — optimal solution can be constructed from optimal solutions of its subproblems
Overlapping sub-problems — problem can be broken down into subproblems which are reused several times or a recursive algorithm for the problem solves the same subproblem over and over rather than always generating new subproblems
Once these two conditions are met we can say that this divide and conquer problem may be solved using dynamic programming approach.
Dynamic programming approach extends divide and conquer approach with two techniques (memoization and tabulation) that both have a purpose of storing and re-using sub-problems solutions that may drastically improve performance. For example naive recursive implementation of Fibonacci function has time complexity of O(2^n)
where DP solution doing the same with only O(n)
time.
Memoization (top-down cache filling) refers to the technique of caching and reusing previously computed results. The memoized fib
function would thus look like this:
memFib(n) {
if (mem[n] is undefined)
if (n < 2) result = n
else result = memFib(n-2) + memFib(n-1)
mem[n] = result
return mem[n]
}
Tabulation (bottom-up cache filling) is similar but focuses on filling the entries of the cache. Computing the values in the cache is easiest done iteratively. The tabulation version of fib
would look like this:
tabFib(n) {
mem[0] = 0
mem[1] = 1
for i = 2...n
mem[i] = mem[i-2] + mem[i-1]
return mem[n]
}
You may read more about memoization and tabulation comparison here.
The main idea you should grasp here is that because our divide and conquer problem has overlapping sub-problems the caching of sub-problem solutions becomes possible and thus memoization/tabulation step up onto the scene.
Since we’re now familiar with DP prerequisites and its methodologies we’re ready to put all that was mentioned above into one picture.
If you want to see code examples you may take a look at more detailed explanation here where you'll find two algorithm examples: Binary Search and Minimum Edit Distance (Levenshtein Distance) that are illustrating the difference between DP and DC.
As posted above, the recursion is the favorite way, with the help of logarithm.
The following function has 3 arguments : the input, the dimension constraint of the output, that is the third argument.
int ByteReDim(unsigned long ival, int constraint, unsigned long *oval)
{
int base = 1 + (int) log10(ival);
(*oval) = ival;
if (base > constraint) {
(*oval) = (*oval) >> 10;
return(1 + ByteReDim((*oval), constraint, oval));
} else
return(0);
}
Now let's convert 12GB of RAM in several units:
int main(void)
{
unsigned long RAM;
int unit; // index of below symbols array
char symbol[5] = {'B', 'K', 'M', 'G', 'T'};
unit = ByteReDim(12884901888, 12, &RAM);
printf("%lu%c\n", RAM, symbol[unit]); // output is 12884901888B
unit = ByteReDim(12884901888, 9, &RAM);
printf("%lu%c\n", RAM, symbol[unit]); // output is 12582912K
unit = ByteReDim(12884901888, 6, &RAM);
printf("%lu%c\n", RAM, symbol[unit]); // output is 12288M
unit = ByteReDim(12884901888, 3, &RAM);
printf("%lu%c\n", RAM, symbol[unit]); // output is 12G
}
The main concept of partial view is returning the HTML code rather than going to the partial view it self.
[HttpGet]
public ActionResult Calendar(int year)
{
var dates = new List<DateTime>() { /* values based on year */ };
HolidayViewModel model = new HolidayViewModel {
Dates = dates
};
return PartialView("HolidayPartialView", model);
}
this action return the HTML code of the partial view ("HolidayPartialView").
To refresh partial view replace the existing item with the new filtered item using the jQuery below.
$.ajax({
url: "/Holiday/Calendar",
type: "GET",
data: { year: ((val * 1) + 1) }
})
.done(function(partialViewResult) {
$("#refTable").html(partialViewResult);
});
Alternatively in Java8 you can use Nullable or NotNull Annotations according to your need.
public class TestingNullable {
@Nullable
public Color nullableMethod(){
//some code here
return color;
}
public void usingNullableMethod(){
// some code
Color color = nullableMethod();
// Introducing assurance of not-null resolves the problem
if (color != null) {
color.toString();
}
}
}
public class TestingNullable {
public void foo(@NotNull Object param){
//some code here
}
...
public void callingNotNullMethod() {
//some code here
// the parameter value according to the explicit contract
// cannot be null
foo(null);
}
}
Clustered Index
Non Clustered Index
Both types of index will improve performance when select data with fields that use the index but will slow down update and insert operations.
Because of the slower insert and update clustered indexes should be set on a field that is normally incremental ie Id or Timestamp.
SQL Server will normally only use an index if its selectivity is above 95%.
Span is considered an in-line element. As such is basically constrains itself to the content within it. It more or less is transparent.
Think of it having the behavior of the 'b' tag.
It can be performed like <span style='font-weight: bold;'>bold text</span>
div is a block element.
SciPy has the function scipy.special.factorial
(formerly scipy.misc.factorial
)
>>> import math
>>> import scipy.special
>>> math.factorial(6)
720
>>> scipy.special.factorial(6)
array(720.0)
Update: It looks like the manual has been updated and the example I was referring to has been removed. See the edit to @flainez's answer above.
Original: Using @objc is the right way to do it even if you're not interoperating with Obj-C. It ensures that your protocol is being applied to a class and not an enum or struct. See "Checking for Protocol Conformance" in the manual.
What is the best practice on where the logic for the @foreach should be at?
Nowhere, just get rid of it. You could use editor or display templates.
So for example:
@foreach (var item in Model.Foos)
{
<div>@item.Bar</div>
}
could perfectly fine be replaced by a display template:
@Html.DisplayFor(x => x.Foos)
and then you will define the corresponding display template (if you don't like the default one). So you would define a reusable template ~/Views/Shared/DisplayTemplates/Foo.cshtml
which will automatically be rendered by the framework for each element of the Foos collection (IEnumerable<Foo> Foos { get; set; }
):
@model Foo
<div>@Model.Bar</div>
Obviously exactly the same conventions apply for editor templates which should be used in case you want to show some input fields allowing you to edit the view model in contrast to just displaying it as readonly.
You need to declare the array in the HTML via
<input type="checkbox" name="Days[]" value="Daily">
Also you can insert multiple items with one query like this
$query = "INSERT INTO example (orange) VALUES ";
for ($i=0; $i<count($checkBox); $i++)
$query .= "('" . $checkBox[$i] . "'),";
$query = rtrim($query,',');
mysql_query($query) or die (mysql_error() );
Also keep in mind that mysql_*
functions are officially deprecated and hence should not be used in new code. You can use PDO or MySQLi instead. See this answer on SO for more information.
I've used bundle update --source
myself for a long time but there are scenarios where it doesn't work. Luckily, there's a gem called bundler-patch
which has the goal of fixing this shortcoming.
I also wrote a short blog post about how to use bundler-patch
and why bundle update --source
doesn't work consistently. Also, be sure to check out a post by chrismo that explains in great detail what the --source
option does.
1- Select LinearLayout findViewById
LinearLayout llayout =(LinearLayout) findViewById(R.id.llayoutId);
2- Set color from R.color.colorId
llayout.setBackgroundColor(getResources().getColor(R.color.colorId));
$connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, OAUTH_TOKEN, OAUTH_TOKEN_SECRET);
$timelines = $connection->get('statuses/user_timeline', array('screen_name' => 'NSE_NIFTY', 'count' => 100, 'include_rts' => 1));
This should do the trick:
$('#thisElement').find('.classToSelect')
You should convert the string to an enumeration value before comparing.
Enum.TryParse("Retailer", out AccountType accountType);
Then
if (userProfile?.AccountType == accountType)
{
//your code
}
Since I had everything being forwarded to index.php anyway I thought I would try setting the headers in PHP instead of the .htaccess file and it worked! YAY! Here's what I added to index.php for anyone else having this problem.
// Allow from any origin
if (isset($_SERVER['HTTP_ORIGIN'])) {
// should do a check here to match $_SERVER['HTTP_ORIGIN'] to a
// whitelist of safe domains
header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
header('Access-Control-Allow-Credentials: true');
header('Access-Control-Max-Age: 86400'); // cache for 1 day
}
// Access-Control headers are received during OPTIONS requests
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
header("Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS");
if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");
}
credit goes to slashingweapon for his answer on this question
Because I'm using Slim I added this route so that OPTIONS requests get a HTTP 200 response
// return HTTP 200 for HTTP OPTIONS requests
$app->map('/:x+', function($x) {
http_response_code(200);
})->via('OPTIONS');
#include <stdio.h>
#include <iostream>
#include <stdlib.h>
#include <string>
using namespace std;
int main ()
{
char *tmp = (char *)malloc(128);
int n=sprintf(tmp, "Hello from Chile.");
string tmp_str = tmp;
cout << *tmp << " : is a char array beginning with " <<n <<" chars long\n" << endl;
cout << tmp_str << " : is a string with " <<n <<" chars long\n" << endl;
free(tmp);
return 0;
}
OUT:
H : is a char array beginning with 17 chars long
Hello from Chile. :is a string with 17 chars long
In Eclipse 3.4 do
If seeing source code too is an issue, open a new question.
For navigation on Jar-file level (as a zip file) I use 7zip which works very well, and allows seeing and editing entries which is great for trouble shooting.
I did not know the answer so asked the ASP.NET team here.
So the trick is to change the signature to HttpResponseMessage
and use Request.CreateResponse
.
[ResponseType(typeof(User))]
public HttpResponseMessage GetUser(HttpRequestMessage request, int userId, DateTime lastModifiedAtClient)
{
var user = new DataEntities().Users.First(p => p.Id == userId);
if (user.LastModified <= lastModifiedAtClient)
{
return new HttpResponseMessage(HttpStatusCode.NotModified);
}
return request.CreateResponse(HttpStatusCode.OK, user);
}
There is also the MATLAB Engine for Python by MathWorks itself. If you have MATLAB, this might be worth considering (I haven't tried it myself but it has a lot more functionality than just reading MATLAB files). However, I don't know if it is allowed to distribute it to other users (it is probably not a problem if those persons have MATLAB. Otherwise, maybe NumPy is the right way to go?).
Also, if you want to do all the basics yourself, MathWorks provides (if the link changes, try to google for matfile_format.pdf
or its title MAT-FILE Format
) a detailed documentation on the structure of the file format. It's not as complicated as I personally thought, but obviously, this is not the easiest way to go. It also depends on how many features of the .mat
-files you want to support.
I've written a "small" (about 700 lines) Python script which can read some basic .mat
-files. I'm neither a Python expert nor a beginner and it took me about two days to write it (using the MathWorks documentation linked above). I've learned a lot of new stuff and it was quite fun (most of the time). As I've written the Python script at work, I'm afraid I cannot publish it... But I can give some advice here:
.mat
-file you want to parse.miCOMPRESSED
, miMATRIX
, mxDOUBLE
, or miINT32
).mat
-files' structure is optimal for saving the data elements in a tree data structure; each node has one class and subnodesI needed to download HLS video and audio streams from a e-learning portal with session-protected content with application/mp2t
MIME content type.
Manually copying all authentication headers into the downloading scripts would be too cumbersome.
But the task got much easier with help of Video DownloadHelper Firefox extension and it's Companion App. It allowed to download both m3u8 playlists with TS chunks lists and actual video and audio streams into mp4 files via a click of button while correctly preserving authentication headers.
The resulting separate video and audio files can be merged with ffmpeg:
ffmpeg -i video.mp4 -i audio.mp4 -acodec copy -vcodec copy video-and-audio.mp4
or with mp4box:
mp4box -add audio.mp4#audio video.mp4 -out video-and-audio.mp4
Tried Video DownloadHelper Chrome extension too, but it didn't work for me.
I thought I had this configured but it turns out I set the URL in the wrong place. I followed the URL provided in the Google error page and added my URL here. Stupid mistake from my part, but easily done. Hope this helps
To visualise, take your keyboard's numpad. If the key '5' represents your rectangle, then all the keys 1-9 represent the 9 quadrants of space divided by the lines that make up your rectangle (with 5 being the inside.)
1) If the circle's center is in quadrant 5 (i.e. inside the rectangle) then the two shapes intersect.
With that out of the way, there are two possible cases: a) The circle intersects with two or more neighboring edges of the rectangle. b) The circle intersects with one edge of the rectangle.
The first case is simple. If the circle intersects with two neighboring edges of the rectangle, it must contain the corner connecting those two edges. (That, or its center lies in quadrant 5, which we have already covered. Also note that the case where the circle intersects with only two opposing edges of the rectangle is covered as well.)
2) If any of the corners A, B, C, D of the rectangle lie inside the circle, then the two shapes intersect.
The second case is trickier. We should make note of that it may only happen when the circle's center lies in one of the quadrants 2, 4, 6 or 8. (In fact, if the center is on any of the quadrants 1, 3, 7, 8, the corresponding corner will be the closest point to it.)
Now we have the case that the circle's center is in one of the 'edge' quadrants, and it only intersects with the corresponding edge. Then, the point on the edge that is closest to the circle's center, must lie inside the circle.
3) For each line AB, BC, CD, DA, construct perpendicular lines p(AB,P), p(BC,P), p(CD,P), p(DA,P) through the circle's center P. For each perpendicular line, if the intersection with the original edge lies inside the circle, then the two shapes intersect.
There is a shortcut for this last step. If the circle's center is in quadrant 8 and the edge AB is the top edge, the point of intersection will have the y-coordinate of A and B, and the x-coordinate of center P.
You can construct the four line intersections and check if they lie on their corresponding edges, or find out which quadrant P is in and check the corresponding intersection. Both should simplify to the same boolean equation. Be wary of that the step 2 above did not rule out P being in one of the 'corner' quadrants; it just looked for an intersection.
Edit: As it turns out, I have overlooked the simple fact that #2 is a subcase of #3 above. After all, corners too are points on the edges. See @ShreevatsaR's answer below for a great explanation. And in the meanwhile, forget #2 above unless you want a quick but redundant check.
Put the loops in a subroutine and call return
you can set shortcut key F12 easy!!!
{ "keys": ["f12"], "command": "reindent" , "args": { "single_line": false } }
see detail here.
Simply, you can use COLLATE NOCASE in your SELECT query:
SELECT * FROM ... WHERE name = 'someone' COLLATE NOCASE
You have to give like this:
echo $json_a['John']['status'];
echo "<>"
echo $json_a['Jennifer']['status'];
br inside <>
Which gives the result :
wait
active
Many people had difficulty in using this keyword when we have iteration of Drop-downs with same elements but different values or say as Multi line data in USER INTERFACE. : Here is the code snippet : $(this).find('option[value=yourvalue]');
Hope you got this.
Here is complete console working application code. Please install RestSharp package.
using RestSharp;
using System;
namespace RESTSharpClient
{
class Program
{
static void Main(string[] args)
{
string url = "https://abc.example.com/";
string jsonString = "{" +
"\"auth\": {" +
"\"type\" : \"basic\"," +
"\"password\": \"@P&p@y_10364\"," +
"\"username\": \"prop_apiuser\"" +
"}," +
"\"requestId\" : 15," +
"\"method\": {" +
"\"name\": \"getProperties\"," +
"\"params\": {" +
"\"showAllStatus\" : \"0\"" +
"}" +
"}" +
"}";
IRestClient client = new RestClient(url);
IRestRequest request = new RestRequest("api/properties", Method.POST, DataFormat.Json);
request.AddHeader("Content-Type", "application/json; CHARSET=UTF-8");
request.AddJsonBody(jsonString);
var response = client.Execute(request);
Console.WriteLine(response.Content);
//TODO: do what you want to do with response.
}
}
}
I always use the micro-clearfix :
.cf:before,
.cf:after {
content: " ";
display: table;
}
.cf:after {
clear: both;
}
/**
* For IE 6/7 only
*/
.cf {
*zoom: 1;
}
In Cascade Framework I even apply it by default on block level elements. IMO, applying it by default on block level elements gives block level elements more intuitive behavior than their traditonal behavior. It also made it a lot easier for me to add support for older browsers to Cascade Framework (which supports IE6-8 as well as modern browsers).
Once you have put the values into the JSONObject then put the JSONObject into the JSONArray staright after.
Something like this maybe:
jsonObj.put("value1", 1);
jsonObj.put("value2", 900);
jsonObj.put("value3", 1368349);
jsonArray.put(jsonObj);
Then create new JSONObject, put the other values into it and add it to the JSONArray:
jsonObj.put("value1", 2);
jsonObj.put("value2", 1900);
jsonObj.put("value3", 136856);
jsonArray.put(jsonObj);
For the first question I think answer would be:
<your DataFrame>.rename(columns={'count':'Total_Numbers'})
or
<your DataFrame>.columns = ['ID', 'Region', 'Total_Numbers']
As for second one I'd say the answer would be no. It's possible to use it like 'df.ID' because of python datamodel:
Attribute references are translated to lookups in this dictionary, e.g., m.x is equivalent to m.dict["x"]
Ok this is my solution: in ~/.bash_aliases just add the following:
# ADDS MY PATH WHEN SET AS ROOT
if [ $(id -u) = "0" ]; then
export PATH=$PATH:/home/your_user/bin
fi
Voila! Now you can execute your own scripts with sudo or set as ROOT without having to do an export PATH=$PATH:/home/your_user/bin everytime.
Notice that I need to be explicit when adding my PATH since HOME for superuser is /root
I saw a nice solution in this stackoverflow link that may help the readers of the defulat servlet handling issue by using the empty string URL pattern "" :
@WebServlet("")
or
<servlet-mapping>
<servlet-name>yourHomeServlet</servlet-name>
<url-pattern></url-pattern> <!-- Yes, empty string! -->
</servlet-mapping>
You can do something like:
.background(Color.black)
around your view.
eg. from the default template (I am encompassing it around a Group):
var body: some View {
VStack {
Text("Hello SwiftUI!")
}
.background(Color.black)
}
To add some opacity to it, you can add the .opacity
method as well:
.background(Color.black.opacity(0.5))
You can also make use of the inspect element of the view by CMD + click on the View and clicking Show SwiftUI Inspector
> Background
> Your Color
Ok so i found out the problem :)
ctrl+alt+delete to start task manager, once you get to task manager go to services. find MySQL and right click on it. Then click stop process. That worked for me and i hope it works for you :D
Another variant to POST this content type and which does not use a dictionary would be:
StringContent postData = new StringContent(JSON_CONTENT, Encoding.UTF8, "application/x-www-form-urlencoded");
using (HttpResponseMessage result = httpClient.PostAsync(url, postData).Result)
{
string resultJson = result.Content.ReadAsStringAsync().Result;
}
As you went through the tutorial you must have come across the section on migration, as this was one of the major changes in Django 1.7
Prior to Django 1.7, the syncdb command never made any change that had a chance to destroy data currently in the database. This meant that if you did syncdb for a model, then added a new row to the model (a new column, effectively), syncdb would not affect that change in the database.
So either you dropped that table by hand and then ran syncdb again (to recreate it from scratch, losing any data), or you manually entered the correct statements at the database to add only that column.
Then a project came along called south
which implemented migrations. This meant that there was a way to migrate forward (and reverse, undo) any changes to the database and preserve the integrity of data.
In Django 1.7, the functionality of south
was integrated directly into Django. When working with migrations, the process is a bit different.
models.py
(as normal).makemigrations
command. This command is smart enough to detect what has changed and will create a script to effect that change to your database.migrate
. This command applies all migrations in order.So your normal syncdb
is now a two-step process, python manage.py makemigrations
followed by python manage.py migrate
.
Now, on to your specific problem:
class Snippet(models.Model):
owner = models.ForeignKey('auth.User', related_name='snippets')
highlighted = models.TextField()
created = models.DateTimeField(auto_now_add=True)
title = models.CharField(max_length=100, blank=True, default='')
code = models.TextField()
linenos = models.BooleanField(default=False)
language = models.CharField(choices=LANGUAGE_CHOICES,
default='python',
max_length=100)
style = models.CharField(choices=STYLE_CHOICES,
default='friendly',
max_length=100)
In this model, you have two fields highlighted
and code
that is required (they cannot be null).
Had you added these fields from the start, there wouldn't be a problem because the table has no existing rows?
However, if the table has already been created and you add a field that cannot be null, you have to define a default value to provide for any existing rows - otherwise, the database will not accept your changes because they would violate the data integrity constraints.
This is what the command is prompting you about. You can tell Django to apply a default during migration, or you can give it a "blank" default highlighted = models.TextField(default='')
in the model itself.
Laravel Collection
implements the PHP ArrayAccess
interface (which is why using foreach
is possible in the first place).
If you have the key already you can just use PHP unset
.
I prefer this, because it clearly modifies the collection in place, and is easy to remember.
foreach ($collection as $key => $value) {
unset($collection[$key]);
}
This is my solution....
<TextBlock TextWrapping="Wrap" Style="{DynamicResource InstructionStyle}">
<Run Text="This wizard will take you through the purge process in the correct order." FontWeight="Bold"></Run>
<LineBreak></LineBreak>
<Run Text="To Begin, select" FontStyle="Italic"></Run>
<Run x:Name="InstructionSection" Text="'REPLACED AT RUNTIME'" FontWeight="Bold"></Run>
<Run Text="from the menu." FontStyle="Italic"></Run>
</TextBlock>
I am learning... so if anyone has thaughts on the above solution please share! :)
Here's a Counter
answer for the simplest case.
This is shorter than the one above that does two-way diffs because it only does exactly what the question asks: generate a list of what's in the first list but not the second.
from collections import Counter
lst1 = ['One', 'Two', 'Three', 'Four']
lst2 = ['One', 'Two']
c1 = Counter(lst1)
c2 = Counter(lst2)
diff = list((c1 - c2).elements())
Alternatively, depending on your readability preferences, it makes for a decent one-liner:
diff = list((Counter(lst1) - Counter(lst2)).elements())
Output:
['Three', 'Four']
Note that you can remove the list(...)
call if you are just iterating over it.
Because this solution uses counters, it handles quantities properly vs the many set-based answers. For example on this input:
lst1 = ['One', 'Two', 'Two', 'Two', 'Three', 'Three', 'Four']
lst2 = ['One', 'Two']
The output is:
['Two', 'Two', 'Three', 'Three', 'Four']
"fb://page/
does not work with newer versions of the FB app. You should use fb://facewebmodal/f?href=
for newer versions.
This is a full fledged working code currently live in one of my apps:
public static String FACEBOOK_URL = "https://www.facebook.com/YourPageName";
public static String FACEBOOK_PAGE_ID = "YourPageName";
//method to get the right URL to use in the intent
public String getFacebookPageURL(Context context) {
PackageManager packageManager = context.getPackageManager();
try {
int versionCode = packageManager.getPackageInfo("com.facebook.katana", 0).versionCode;
if (versionCode >= 3002850) { //newer versions of fb app
return "fb://facewebmodal/f?href=" + FACEBOOK_URL;
} else { //older versions of fb app
return "fb://page/" + FACEBOOK_PAGE_ID;
}
} catch (PackageManager.NameNotFoundException e) {
return FACEBOOK_URL; //normal web url
}
}
This method will return the correct url for app if installed or web url if app is not installed.
Then start an intent as follows:
Intent facebookIntent = new Intent(Intent.ACTION_VIEW);
String facebookUrl = getFacebookPageURL(this);
facebookIntent.setData(Uri.parse(facebookUrl));
startActivity(facebookIntent);
That's all you need.
It worked fine with me,
$this->db->where("your_id !=",$your_id);
Or try this one,
$this->db->where("your_id <>",$your_id);
Or try this one,
$this->db->where("your_id IS NOT NULL");
all will work.
You can use filter for it:
filter(lambda x: self.states[x], range(len(self.states)))
The range
here enumerates elements of your list and since we want only those where self.states
is True
, we are applying a filter based on this condition.
For Python > 3.0:
list(filter(lambda x: self.states[x], range(len(self.states))))
Usually all users will have write access to /tmp. Place the file to /tmp and then login to putty , then you can sudo and copy the file.
I have run into the same issue. Run SSMS as administrator then right click and do database restore. Should work.
When you set a percentage height on an element who's parent elements don't have heights set, the parent elements have a default
height: auto;
You are asking the browser to calculate a height from an undefined value. Since that would equal a null-value, the result is that the browser does nothing with the height of child elements.
Besides using a JavaScript solution you could use this deadly easy table method:
#parent3 {
display: table;
width: 100%;
}
#parent3 .between {
display: table-row;
}
#parent3 .child {
display: table-cell;
}
Preview on http://jsbin.com/IkEqAfi/1
But: Bare in mind, that the table method only works properly in all modern Browsers and the Internet Explorer 8 and higher. As Fallback you could use JavaScript.
There is an app in google play known as MyAppSharer. Open the app, search for the app that you have installed, check apk and select share. The app would take some time and build the apk. You can then close the app. The apk of the file is located in /sdcard/MyAppSharer
This does not require rooting your phone and works only for apps that are currently installed on your phone
I found this to work flawlessly if you want to share whole screen.
@IBAction func shareButton(_ sender: Any) {
let bounds = UIScreen.main.bounds
UIGraphicsBeginImageContextWithOptions(bounds.size, true, 0.0)
self.view.drawHierarchy(in: bounds, afterScreenUpdates: false)
let img = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
let activityViewController = UIActivityViewController(activityItems: [img!], applicationActivities: nil)
activityViewController.popoverPresentationController?.sourceView = self.view
self.present(activityViewController, animated: true, completion: nil)
}
You just need to use Dispatcher to perform graphical operation from a thread other then UI thread. I don't think that this will affect behavior of the main form. This may help you : Accessing UI Control from BackgroundWorker Thread
package naresh.java;
public class TestDoubleString {
public static void main(String args[]){
String str="abbcccddef";
char charArray[]=str.toCharArray();
int len=charArray.length;
for(int i=0;i<len;i++){
//if i th one and i+1 th character are same then update the charArray
try{
if(charArray[i]==charArray[i+1]){
charArray[i]='0';
}}
catch(Exception e){
System.out.println("Exception");
}
}//finally printing final character string
for(int k=0;k<charArray.length;k++){
if(charArray[k]!='0'){
System.out.println(charArray[k]);
} }
}
}
This can easily happen when you have 2 different databases and specially 2 different databases from 2 different servers. Best option is to change it to a common collection and do the join or comparison.
SELECT
*
FROM sd
INNER JOIN pd ON sd.SCaseflowID COLLATE Latin1_General_CS_AS = pd.PDebt_code COLLATE Latin1_General_CS_AS
if anyone has a problem on Mac, can try this
sudo pip install --upgrade matplotlib --ignore-installed six
There are 2 cases:
(1) Local variables declared static
: Allocated in data segment instead of stack. Its value retains when you call the function again.
(2) Global variables or functions declared static
: Invisible outside compilation unit (i.e. are local symbols in symbol table during linking).
I was getting this error because I was using an older version of angular that wasn't compatible with my code.
If you need to do it dynamically in the browser using javascript, here is an example...
<img id=graph alt=""
src="http://www.kitco.com/images/live/gold.gif"
/>
<script language="javascript" type="text/javascript">
var d = new Date();
document.getElementById("graph").src =
"http://www.kitco.com/images/live/gold.gif?ver=" +
d.getTime();
</script>
Faced this issue recently with TypeScript 1.0.1, and solved this way:
enum IEvents {
/** A click on a product or product link for one or more products. */
CLICK,
/** A view of product details. */
DETAIL,
/** Adding one or more products to a shopping cart. */
ADD,
/** Remove one or more products from a shopping cart. */
REMOVE,
/** Initiating the checkout process for one or more products. */
CHECKOUT,
/** Sending the option value for a given checkout step. */
CHECKOUT_OPTION,
/** The sale of one or more products. */
PURCHASE,
/** The refund of one or more products. */
REFUND,
/** A click on an internal promotion. */
PROMO_CLICK
}
var Events = [
'click',
'detail',
'add',
'remove',
'checkout',
'checkout_option',
'purchase',
'refund',
'promo_click'
];
function stuff(event: IEvents):boolean {
// event can now be only IEvents constants
Events[event]; // event is actually a number that matches the index of the array
}
// stuff('click') won't work, it needs to be called using stuff(IEvents.CLICK)
Both getSingleResult()
and getOneOrNullResult()
will throw an exception if there is more than one result.
To fix this problem you could add setMaxResults(1)
to your query builder.
$firstSubscriber = $entity->createQueryBuilder()->select('sub')
->from("\Application\Entity\Subscriber", 'sub')
->where('sub.subscribe=:isSubscribe')
->setParameter('isSubscribe', 1)
->setMaxResults(1)
->getQuery()
->getOneOrNullResult();
Try this:
$array = array_values($array);
Using array_values()
Note: The linked Jenkins issue has since been solved.
As mention in JENKINS-26133 it was not possible to get shell output as a variable. As a workaround suggested using of writ-read from temporary file. So, your example would have looked like:
sh "echo foo > result";
def output=readFile('result').trim()
echo "output=$output";
In docker image of PHP-FPM, i've see such approach:
# cat /usr/local/etc/php-fpm.d/docker.conf
[global]
error_log = /proc/self/fd/2
[www]
; if we send this to /proc/self/fd/1, it never appears
access.log = /proc/self/fd/2
Try this solution. Only fires once the page loads and then during window resize at predefined resizeDelay
.
$(document).ready(function()
{
var resizeDelay = 200;
var doResize = true;
var resizer = function () {
if (doResize) {
//your code that needs to be executed goes here
doResize = false;
}
};
var resizerInterval = setInterval(resizer, resizeDelay);
resizer();
$(window).resize(function() {
doResize = true;
});
});
The other approach would be to allocate one contiguous chunk of memory comprising header block for pointers to rows as well as body block to store actual data in rows. Then just mark up memory by assigning addresses of memory in body to the pointers in header on per-row basis. It would look like follows:
int** 2dAlloc(int rows, int* columns) {
int header = rows * sizeof(int*);
int body = 0;
for(int i=0; i<rows; body+=columnSizes[i++]) {
}
body*=sizeof(int);
int** rowptr = (int**)malloc(header + body);
int* buf = (int*)(rowptr + rows);
rowptr[0] = buf;
int k;
for(k = 1; k < rows; ++k) {
rowptr[k] = rowptr[k-1] + columns[k-1];
}
return rowptr;
}
int main() {
// specifying column amount on per-row basis
int columns[] = {1,2,3};
int rows = sizeof(columns)/sizeof(int);
int** matrix = 2dAlloc(rows, &columns);
// using allocated array
for(int i = 0; i<rows; ++i) {
for(int j = 0; j<columns[i]; ++j) {
cout<<matrix[i][j]<<", ";
}
cout<<endl;
}
// now it is time to get rid of allocated
// memory in only one call to "free"
free matrix;
}
The advantage of this approach is elegant freeing of memory and ability to use array-like notation to access elements of the resulting 2D array.
You should use something like this:
<div style="text-align:center">
<input type="submit" />
</div>
Or you could use something like this. By giving the element a width and specifying auto
for the left and right margins the element will center itself in its parent.
<input type="submit" style="width: 300px; margin: 0 auto;" />
This is caused whenever the android device cannot reach the metro server. If the above doesn't work, check to see that your android device doesn't have a proxy configured. (Settings > Proxy > No Proxy).
int value = 1;
string description = Enumerations.GetEnumDescription((MyEnum)value);
The default underlying data type for an enum
in C# is an int
, you can just cast it.
First I'd check to verify it is listening on the IPs you expect it to be:
netstat -nlpt | grep 6379
Depending on how you start/stop you may not have actually restarted the instance when you thought you had. The netstat will tell you if it is listening where you think it is. If not, restart it and be sure it restarts. If it restarts and still is not listening where you expect, check your config file just to be sure.
After establishing it is listening where you expect it to, from a remote node which should have access try:
redis-cli -h REMOTE.HOST ping
You could also try that from the local host but use the IP you expect it to be listening on instead of a hostname or localhost. You should see it PONG in response in both cases.
If not, your firewall(s) is/are blocking you. This would be either the local IPTables or possibly a firewall in between the nodes. You could add a logging statement to your IPtables configuration to log connections over 6379 to see what is happening. Also, trying he redis ping from local and non-local to the same IP should be illustrative. If it responds locally but not remotely, I'd lean toward an intervening firewall depending on the complexity of your on-node IP Tables rules.
Yes this post is 8 years old, but incase someone comes on here also looking for an answer: you can now just use semicolons. However, you cannot use if/elif/else staments, for/while loops, and you can't define functions. The main use of this would be when using imported modules where you don't have to define any functions or use any if/elif/else/for/while statements/loops.
Here's an example that takes the artist of a song, the song name, and searches genius for the lyrics:
import bs4, requests; song = input('Input artist then song name\n'); print(bs4.BeautifulSoup(requests.get(f'https://genius.com/{song.replace(" ", "-")}-lyrics').text,'html.parser').select('.lyrics')[0].text.strip())
-apple-system allows you to pick San Francisco in Safari. BlinkMacSystemFont is the corresponding alternative for Chrome.
font-family: -apple-system, BlinkMacSystemFont, sans-serif;
Roboto or Helvetica Neue could be inserted as fallbacks even before sans-serif.
https://www.smashingmagazine.com/2015/11/using-system-ui-fonts-practical-guide/#details-of-approach-a (how or previously http://furbo.org/2015/07/09/i-left-my-system-fonts-in-san-francisco/ do a great job explaining the details.
<%# (string)Eval("gender") =="M" ? "Male" :"Female"%>
The idea I generally use when working with transactions looks like this (semi-pseudo-code):
try {
// First of all, let's begin a transaction
$db->beginTransaction();
// A set of queries; if one fails, an exception should be thrown
$db->query('first query');
$db->query('second query');
$db->query('third query');
// If we arrive here, it means that no exception was thrown
// i.e. no query has failed, and we can commit the transaction
$db->commit();
} catch (\Throwable $e) {
// An exception has been thrown
// We must rollback the transaction
$db->rollback();
throw $e; // but the error must be handled anyway
}
PDO::setAttribute
PDO::ATTR_ERRMODE
and PDO::ERRMODE_EXCEPTION
For example, quite often you'll have a couple of queries before the transaction (before the begin
) and another couple of queries after the transaction (after either commit
or rollback
) and you'll want those queries executed no matter what happened (or not) in the transaction.
Update PHP 7.4
Curly brace access syntax is deprecated since PHP 7.4
Update 2019
Moving on to the best practices of OOPS, @MrTrick's answer must be marked as correct, although my answer provides a hacked solution its not the best method.
Simply iterate its using {}
Example:
$videos{0}->id
This way your object is not destroyed and you can easily iterate through object.
For PHP 5.6 and below use this
$videos{0}['id']
Both array() and the stdClass objects can be accessed using the
current()
key()
next()
prev()
reset()
end()
functions.
So, if your object looks like
object(stdClass)#19 (3) {
[0]=>
object(stdClass)#20 (22) {
["id"]=>
string(1) "123"
etc...
Then you can just do;
$id = reset($obj)->id; //Gets the 'id' attr of the first entry in the object
If you need the key for some reason, you can do;
reset($obj); //Ensure that we're at the first element
$key = key($obj);
Hope that works for you. :-) No errors, even in super-strict mode, on PHP 5.4
2022 Update:
After PHP 7.4, using current()
, end()
, etc functions on objects is deprecated.
In newer versions of PHP, use the ArrayIterator class:
$objIterator = new ArrayIterator($obj);
$id = $objIterator->current()->id; // Gets the 'id' attr of the first entry in the object
$key = $objIterator->key(); // and gets the key
This Regex let you avoid wrong result with digits which consits only from zeroes "0000" and work on digits of any length:
using System.Text.RegularExpressions;
/*
00123 => 123
00000 => 0
00000a => 0a
00001a => 1a
00001a => 1a
0000132423423424565443546546356546454654633333a => 132423423424565443546546356546454654633333a
*/
Regex removeLeadingZeroesReg = new Regex(@"^0+(?=\d)");
var strs = new string[]
{
"00123",
"00000",
"00000a",
"00001a",
"00001a",
"0000132423423424565443546546356546454654633333a",
};
foreach (string str in strs)
{
Debug.Print(string.Format("{0} => {1}", str, removeLeadingZeroesReg.Replace(str, "")));
}
And this regex will remove leading zeroes anywhere inside string:
new Regex(@"(?<!\d)0+(?=\d)");
// "0000123432 d=0 p=002 3?0574 m=600"
// => "123432 d=0 p=2 3?574 m=600"
If you encounter an issue in which pylab.show()
freezes the IPython window (this may be Mac OS X specific; not sure), you can cmd-c in the IPython window, switch to the plot window, and it will break out.
Apparently, future calls to pylab.show()
will not freeze the IPython window, only the first call. Unfortunately, I've found that the behavior of the plot window / interactions with show() changes every time I reinstall matplotlib, so this solution may not always hold.
ng g m modules/media
this will generate a module called media
inside modules
folder.
ng g c modules/media/picPick --module=modules/media/media.module.ts
the first part of the command ng g c modules/media/picPick
will generate a component folder called picPick
inside modules/media
folder witch contain our new media
module.
the second part will make our new picPick
component declared in media
module by importing it in the module file and appending it to declarations
array of this module.
My solution, it´s make with jquery-chosen and bootstrap, the id is for jquery chosen, tested and working, I had problems concatenating @foreach but now work with a double @foreach and double @if:
<div class="form-group">
<label for="tagLabel">Tags: </label>
<select multiple class="chosen-tag" id="tagLabel" name="tag_id[]" required>
@foreach($tags as $id => $name)
@if (is_array(Request::old('tag_id')))
<option value="{{ $id }}"
@foreach (Request::old('tag_id') as $idold)
@if($idold==$id)
selected
@endif
@endforeach
style="padding:5px;">{{ $name }}</option>
@else
<option value="{{ $id }}" style="padding:5px;">{{ $name }}</option>
@endif
@endforeach
</select>
</div>
this is the code por jquery chosen (the blade.php code doesn´t need this code to work)
$(".chosen-tag").chosen({
placeholder_text_multiple: "Selecciona alguna etiqueta",
no_results_text: "No hay resultados para la busqueda",
search_contains: true,
width: '500px'
});
I recommend reading this post.
When using AnyCPU, the semantics are the following:
- If the process runs on a 32-bit Windows system, it runs as a 32-bit process. CIL is compiled to x86 machine code.
- If the process runs on a 64-bit Windows system, it runs as a 32-bit process. CIL is compiled to x86 machine code.
- If the process runs on an ARM Windows system, it runs as a 32-bit process. CIL is compiled to ARM machine code.
As of API 21, you could also use:
ResourcesCompat.getDrawable(getResources(), R.drawable.name, null);
Instead of ContextCompat.getDrawable(context, android.R.drawable.ic_dialog_email)
For angular+boilerplate flow which creates next folders tree:
backend/
|
|------ui/
| |------------------build/ <--'static' folder, constructed by Grunt
| |--<proj |----vendors/ <-- angular.js and others here
| |-- folders> |----src/ <-- your js
| |----index.html <-- your SPA entrypoint
|------<proj
|------ folders>
|
|------view.py <-- Flask app here
I use following solution:
...
root = os.path.join(os.path.dirname(os.path.abspath(__file__)), "ui", "build")
@app.route('/<path:path>', methods=['GET'])
def static_proxy(path):
return send_from_directory(root, path)
@app.route('/', methods=['GET'])
def redirect_to_index():
return send_from_directory(root, 'index.html')
...
It helps to redefine 'static' folder to custom.
Try this:
select col1, col2, 'ABC' as col3 from Table1 where col1 = 0;
I had the same issue after I upgraded my JDK from 1.7 to 1.8. I'm using Eclipse 4.4 (Luna). The error is gone after I degrade JDK to 1.7.
I use both to create an Inversion Of Control strategy with more readability for developers who need to maintain it after me.
I use a Factory to create my different Layer objects (Business, Data Access).
ICarBusiness carBusiness = BusinessFactory.CreateCarBusiness();
Another developer will see this and when creating an Business Layer object he looks in BusinessFactory and Intellisense gives the developer all the possible Business Layers to create. Doesn't have to play the game, find the Interface I want to create.
This structure is already Inversion Of Control. I am no longer responsible for creating the specific object. But you still need to ensure Dependency Injection to be able to change things easily. Creating your own custom Dependency Injection is ridiculous, so I use Unity. Within the CreateCarBusiness() I ask Unity to Resolve which class belongs to this and it’s lifetime.
So my code Factory Dependency Injection structure is:
public static class BusinessFactory
{
public static ICarBusiness CreateCarBusiness()
{
return Container.Resolve<ICarBusiness>();
}
}
Now I have the benefit of both. My code is also more readable for other developers as towards scopes of my objects I use, instead of Constructor Dependency Injection which just says every object is available when the class is created.
I use this to change my Database Data Access to a custom coded Data Access layer when I create Unit Tests. I don’t want my Unit Tests to communicate with databases, webservers, e-mail servers etc. They need to test my Business Layer because that’s where the intelligence is.
The answer here does not works for safari, document.ready is often fired too early.
Ought to use the beforeunload
event which prevent you form doing some setTimeout
$(window).on('beforeunload', function(){
$(window).scrollTop(0);
});
Assume scenario where swimmers swim in swimming pool in the areas reserved for them.what happens if swimmers swim other than the areas reserved for them,the whole thing would become mess.similarly iis uses application pools to seperate one process from another.
ForeignKey is represented by django.forms.ModelChoiceField, which is a ChoiceField whose choices are a model QuerySet. See the reference for ModelChoiceField.
So, provide a QuerySet to the field's queryset
attribute. Depends on how your form is built. If you build an explicit form, you'll have fields named directly.
form.rate.queryset = Rate.objects.filter(company_id=the_company.id)
If you take the default ModelForm object, form.fields["rate"].queryset = ...
This is done explicitly in the view. No hacking around.
This should do the job
//get a reference to the canvas
var ctx = $('#canvas')[0].getContext("2d");
//draw a dot
ctx.beginPath();
ctx.arc(20, 20, 10, 0, Math.PI*2, true);
ctx.closePath();
ctx.fill();
Here is how I author custom events:
var event = jQuery.Event('customEventName');
$(element).trigger(event);
Granted, you could simply do
$(element).trigger('eventname');
But the way I wrote allows you to detect whether the user has prevented default or not by doing
var prevented = event.isDefaultPrevented();
This allows you to listen to your end-user's request to stop processing a particular event, such as if you click a button element in a form but do not want to the form to post if there is an error.
I then usually listen to events like so
$(element).off('eventname.namespace').on('eventname.namespace', function () {
...
});
Once again, you could just do
$(element).on('eventname', function () {
...
});
But I've always found this somewhat unsafe, especially if you're working in a team.
There is nothing wrong with the following:
$(element).on('eventname', function () {});
However, assume that I need to unbind this event for whatever reason (imagine a disabled button). I would then have to do
$(element).off('eventname', function () {});
This will remove all eventname
events from $(element)
. You cannot know whether someone in the future will also bind an event to that element, and you'd be inadvertently unbinding that event as well
The safe way to avoid this is to namespace your events by doing
$(element).on('eventname.namespace', function () {});
Lastly, you may have noticed that the first line was
$(element).off('eventname.namespace').on('eventname.namespace', ...)
I personally always unbind an event before binding it just to make sure that the same event handler never gets called multiple times (imagine this was the submit button on a payment form and the event had been bound 5 times)
You can instead use the mysqlclient
package as a drop-in replacement for MySQL-python. It is a fork of MySQL-python
with added support for Python 3.
I had luck with simply
pip install mysqlclient
in my python3.4 virtualenv after
sudo apt-get install python3-dev libmysqlclient-dev
which is obviously specific to ubuntu/debian, but I just wanted to share my success :)
Based on kynan's answer, here are the same aliases, modified so they can handle spaces and initial dashes in filenames:
accept-ours = "!f() { [ -z \"$@\" ] && set - '.'; git checkout --ours -- \"$@\"; git add -u -- \"$@\"; }; f"
accept-theirs = "!f() { [ -z \"$@\" ] && set - '.'; git checkout --theirs -- \"$@\"; git add -u -- \"$@\"; }; f"
Blocking in Node.js is not necessary, even when developing tight hardware solutions. See temporal.js which does not use setTimeout
or setInterval
setImmediate. Instead, it uses setImmediate
or nextTick
which give much higher resolution task execution, and you can create a linear list of tasks. But you can do it without blocking the thread.
I think that it's better to use simply str_replace, like the manual says:
If you don't need fancy replacing rules (like regular expressions), you should always use this function instead of ereg_replace() or preg_replace().
<?
$badUrl = "http://www.site.com/backend.php?/c=crud&m=index&t=care";
$goodUrl = str_replace('?/', '?', $badUrl);
global
Example:
words = [...]
def contains (word):
global words # <- not really needed
return (word in words)
def add (word):
global words # must specify that we're working with a global keyword
if word not in words:
words += [word]
The other answers work for real files, but if you need something that works for "file-like objects", try this:
# f is a file-like object.
f.seek(0, os.SEEK_END)
size = f.tell()
It works for real files and StringIO's, in my limited testing. (Python 2.7.3.) The "file-like object" API isn't really a rigorous interface, of course, but the API documentation suggests that file-like objects should support seek()
and tell()
.
Edit
Another difference between this and os.stat()
is that you can stat()
a file even if you don't have permission to read it. Obviously the seek/tell approach won't work unless you have read permission.
Edit 2
At Jonathon's suggestion, here's a paranoid version. (The version above leaves the file pointer at the end of the file, so if you were to try to read from the file, you'd get zero bytes back!)
# f is a file-like object.
old_file_position = f.tell()
f.seek(0, os.SEEK_END)
size = f.tell()
f.seek(old_file_position, os.SEEK_SET)
What finally worked for me is similar to what @????DJ suggested, but the tabBackground
should be in the layout
file and not inside the style
, so it looks like:
res/layout/somefile.xml
:
<android.support.design.widget.TabLayout
....
app:tabBackground="@drawable/tab_color_selector"
...
/>
and the selector
res/drawable/tab_color_selector.xml
:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/tab_background_selected" android:state_selected="true"/>
<item android:drawable="@color/tab_background_unselected"/>
</selector>
This worked for me on Ubuntu:
Stop MySQL server:
/etc/init.d/mysql stop
Start MySQL from the commandline:
/usr/sbin/mysqld
In another terminal enter mysql and issue:
grant all privileges on *.* to 'root'@'%' with grant option;
You may also want to add
grant all privileges on *.* to 'root'@'localhost' with grant option;
and optionally use a password as well.
flush privileges;
and then exit your MySQL prompt and then kill the mysqld server running in the foreground. Restart with
/etc/init.d/mysql start
Few answers that may be useful, especially if you have dynamic content.
$('#dialogueForm').live("dialogclose", function(){
//your code to run on dialog close
});
Or, when opening the modal, have a callback.
$( "#dialogueForm" ).dialog({
autoOpen: false,
height: "auto",
width: "auto",
modal: true,
my: "center",
at: "center",
of: window,
close : function(){
// functionality goes here
}
});
If you are profiling your code and can use IPython, it has the magic function %timeit
.
%%timeit
operates on cells.
In [2]: %timeit cos(3.14)
10000000 loops, best of 3: 160 ns per loop
In [3]: %%timeit
...: cos(3.14)
...: x = 2 + 3
...:
10000000 loops, best of 3: 196 ns per loop
For your reference, I believe you can "hard cut" commits out of your current branch not only with git reset --hard, but also with the following command:
git checkout -B <branch-name> <SHA>
In fact, if you don't care about checking out, you can set the branch to whatever you want with:
git branch -f <branch-name> <SHA>
This would be a programmatic way to remove commits from a branch, for instance, in order to copy new commits to it (using rebase).
Suppose you have a branch that is disconnected from master because you have taken sources from some other location and dumped it into the branch.
You now have a branch in which you have applied changes, let's call it "topic".
You will now create a duplicate of your topic branch and then rebase it onto the source code dump that is sitting in branch "dump":
git branch topic_duplicate topic
git rebase --onto dump master topic_duplicate
Now your changes are reapplied in branch topic_duplicate based on the starting point of "dump" but only the commits that have happened since "master". So your changes since master are now reapplied on top of "dump" but the result ends up in "topic_duplicate".
You could then replace "dump" with "topic_duplicate" by doing:
git branch -f dump topic_duplicate
git branch -D topic_duplicate
Or with
git branch -M topic_duplicate dump
Or just by discarding the dump
git branch -D dump
Perhaps you could also just cherry-pick after clearing the current "topic_duplicate".
What I am trying to say is that if you want to update the current "duplicate" branch based off of a different ancestor you must first delete the previously "cherrypicked" commits by doing a git reset --hard <last-commit-to-retain>
or git branch -f topic_duplicate <last-commit-to-retain>
and then copying the other commits over (from the main topic branch) by either rebasing or cherry-picking.
Rebasing only works on a branch that already has the commits, so you need to duplicate your topic branch each time you want to do that.
Cherrypicking is much easier:
git cherry-pick master..topic
So the entire sequence will come down to:
git reset --hard <latest-commit-to-keep>
git cherry-pick master..topic
When your topic-duplicate branch has been checked out. That would remove previously-cherry-picked commits from the current duplicate, and just re-apply all of the changes happening in "topic" on top of your current "dump" (different ancestor). It seems a reasonably convenient way to base your development on the "real" upstream master while using a different "downstream" master to check whether your local changes also still apply to that. Alternatively you could just generate a diff and then apply it outside of any Git source tree. But in this way you can keep an up-to-date modified (patched) version that is based on your distribution's version while your actual development is against the real upstream master.
So just to demonstrate:
Hope this helps someone. I was meaning to rewrite this, but I cannot manage now. Regards.
The dash type of a linestyle
is given by the linetype
, which does also select the line color unless you explicitely set an other one with linecolor
.
However, the support for dashed lines depends on the selected terminal:
png
(uses libgd
)pngcairo
, support dashed lines, but it is disables by default. To enable it, use set termoption dashed
, or set terminal pngcairo dashed ...
.linetype
, use the test
command:Running
set terminal pngcairo dashed
set output 'test.png'
test
set output
gives:
whereas, the postscript
terminal shows different dash patterns:
set terminal postscript eps color colortext
set output 'test.eps'
test
set output
Starting with version 5.0 the following changes related to linetypes, dash patterns and line colors are introduced:
A new dashtype
parameter was introduced:
To get the predefined dash patterns, use e.g.
plot x dashtype 2
You can also specify custom dash patterns like
plot x dashtype (3,5,10,5),\
2*x dashtype '.-_'
The terminal options dashed
and solid
are ignored. By default all lines are solid. To change them to dashed, use e.g.
set for [i=1:8] linetype i dashtype i
The default set of line colors was changed. You can select between three different color sets with set colorsequence default|podo|classic
:
This prints out all ASCII values:
int main()
{
int i;
i=0;
do
{
printf("%d %c \n",i,i);
i++;
}
while(i<=255);
return 0;
}
and this prints out the ASCII value for a given character:
int main()
{
int e;
char ch;
clrscr();
printf("\n Enter a character : ");
scanf("%c",&ch);
e=ch;
printf("\n The ASCII value of the character is : %d",e);
getch();
return 0;
}
It depends on what best means for you. Productivity wise, don't reinvent the wheel and use Apache Commons. Which is here FileUtils.readFileToByteArray(File input)
.
How about this
for (int i = 0; i < str.length(); i++) {
System.out.println(str.substring(i, i + 1));
}
If you have to disable SSL checks for one git server hosting several repositories, you can run :
git config --bool --add http.https://my.bad.server.sslverify false
This will add it to your user's configuration.
Command to check:
git config --bool --get-urlmatch http.sslverify https://my.bad.server
(If you still use git < v1.8.5, run git config --global http.https://my.bad.server.sslVerify false
)
Explanation from the documentation where the command is at the end, show the
.gitconfig
content looking like:
[http "https://my.bad.server"]
sslVerify = false
It will ignore any certificate checks for this server, whatever the repository.
You also have some explanation in the code
If john were an optional var (declared thusly)
var john: Person?
then it would be possible for john to have no value (in ObjC parlance, nil value)
The exclamation point basically tells the compiler "I know this has a value, you don't need to test for it". If you didn't want to use it, you could conditionally test for it:
if let otherPerson = john {
otherPerson.apartment = number73
}
The interior of this will only evaluate if john has a value.
var data=[];
var $el=$("#my-select");
$el.find('option:selected').each(function(){
data.push({value:$(this).val(),text:$(this).text()});
});
console.log(data)
Avoid converting the table object directly. If relations are set between other tables, it might throw this error. Rather, you can create a model class, assign values to the class object and then serialize it.
I had an onpremises HA installation, a master and a worker stopped working returning a NOTReady status. Checking the kubelet logs on the nodes I found out this problem:
failed to run Kubelet: Running with swap on is not supported, please disable swap! or set --fail-swap-on flag to false
Disabling swap on nodes with
swapoff -a
and restarting the kubelet
systemctl restart kubelet
did the work.
In Rails 3, 4, and 5 you can use:
Rails.application.routes.url_helpers
e.g.
Rails.application.routes.url_helpers.posts_path
Rails.application.routes.url_helpers.posts_url(:host => "example.com")
session_status() === PHP_SESSION_ACTIVE ?: session_start();
Closed Game
On my installation of Fedora 25 (workstation) all of the distribution ID info was found in this file:
/usr/lib/os.release.d/os-release-workstation
This included,
#!/usr/bin/awk -f
BEGIN {
command = "ls -lh"
command |getline
}
Runs "ls -lh" in an awk script
In my case I was missing the curly braces. I had @Value("foo.bar") String value
instead of the correct form @Value("${foo.bar}") String value
I am using a class that just uses one of the above methods behind the scenes... I noticed it works on Windows and Linux... I like using it though because it's easier to type clear() instead of system('clear') or os.system('clear')
pip3 install clear-screen
from clear_screen import clear
and then when you want to clear the shell:
clear()