R-squared is a statistic that only applies to linear regression.
Essentially, it measures how much variation in your data can be explained by the linear regression.
So, you calculate the "Total Sum of Squares", which is the total squared deviation of each of your outcome variables from their mean. . .
where y_bar is the mean of the y's.
Then, you calculate the "regression sum of squares", which is how much your FITTED values differ from the mean
and find the ratio of those two.
Now, all you would have to do for a polynomial fit is plug in the y_hat's from that model, but it's not accurate to call that r-squared.
Here is a link I found that speaks to it a little.
As of pandas 0.20.3, use .to_pydatetime()
to convert any pandas.DateTimeIndex
instances to Python datetime.datetime
.
Your LD_LIBRARY_PATH
doesn't include the path to libsvmlight.so
.
$ export LD_LIBRARY_PATH=/home/tim/program_files/ICMCluster/svm_light/release/lib:$LD_LIBRARY_PATH
The &&
function is not vectorized. You need the &
function:
EUR <- PCs[which(PCs$V13 < 9 & PCs$V13 > 3), ]
BackgroundTint works as color filter.
Try seeing the difference by comment tint/background and check the output when both are set.
I solved my problem with:
System.setProperty("https.proxyHost", "myProxy");
System.setProperty("https.proxyPort", "80");
or http.proxyHost
...
You can use
root.setBackgroundColor(0xFFFFFFFF);
or
root.setBackgroundColor(Color.parseColor("#ffffff"));
<%= Html.Partial("PartialName", Model) %>
Whilst the most upvoted answer is correct but it lacks usage of multi-core processing. In my case, having 12 cores I use PLink:
Parallel.ForEach(
File.ReadLines(filename), //returns IEumberable<string>: lazy-loading
new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount },
(line, state, index) =>
{
//process line value
}
);
Worth mentioning, I got that as an interview question asking return Top 10 most occurrences:
var result = new ConcurrentDictionary<string, int>(StringComparer.InvariantCultureIgnoreCase);
Parallel.ForEach(
File.ReadLines(filename),
new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount },
(line, state, index) =>
{
result.AddOrUpdate(line, 1, (key, val) => val + 1);
}
);
return result
.OrderByDescending(x => x.Value)
.Take(10)
.Select(x => x.Value);
Benchmarking:
BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19042
Intel Core i7-8700K CPU 3.70GHz (Coffee Lake), 1 CPU, 12 logical and 6 physical cores
[Host] : .NET Framework 4.8 (4.8.4250.0), X64 RyuJIT
DefaultJob : .NET Framework 4.8 (4.8.4250.0), X64 RyuJIT
Method | Mean | Error | StdDev | Gen 0 | Gen 1 | Gen 2 | Allocated |
---|---|---|---|---|---|---|---|
GetTopWordsSync | 33.03 s | 0.175 s | 0.155 s | 1194000 | 314000 | 7000 | 7.06 GB |
GetTopWordsParallel | 10.89 s | 0.121 s | 0.113 s | 1225000 | 354000 | 8000 | 7.18 GB |
And as you can see it's 75% performance improvement.
In my case, I created a new ChildComponent in Parentcomponent whereas both in the same module but Parent is registered in a shared module so I created ChildComponent using CLI which registered Child in the current module but my parent was registered in the shared module.
So register the ChildComponent in Shared Module manually.
A bit late of a answer, but here is a reusable solution:
/**
* An extension of TextWatcher which stops further callbacks being called as
* a result of a change happening within the callbacks themselves.
*/
public abstract class EditableTextWatcher implements TextWatcher {
private boolean editing;
@Override
public final void beforeTextChanged(CharSequence s, int start,
int count, int after) {
if (editing)
return;
editing = true;
try {
beforeTextChange(s, start, count, after);
} finally {
editing = false;
}
}
protected abstract void beforeTextChange(CharSequence s, int start,
int count, int after);
@Override
public final void onTextChanged(CharSequence s, int start,
int before, int count) {
if (editing)
return;
editing = true;
try {
onTextChange(s, start, before, count);
} finally {
editing = false;
}
}
protected abstract void onTextChange(CharSequence s, int start,
int before, int count);
@Override
public final void afterTextChanged(Editable s) {
if (editing)
return;
editing = true;
try {
afterTextChange(s);
} finally {
editing = false;
}
}
public boolean isEditing() {
return editing;
}
protected abstract void afterTextChange(Editable s);
}
So when the above is used, any setText()
calls happening within the TextWatcher will not result in the TextWatcher being called again:
/**
* A setText() call in any of the callbacks below will not result in TextWatcher being
* called again.
*/
public class MyTextWatcher extends EditableTextWatcher {
@Override
protected void beforeTextChange(CharSequence s, int start, int count, int after) {
}
@Override
protected void onTextChange(CharSequence s, int start, int before, int count) {
}
@Override
protected void afterTextChange(Editable s) {
}
}
Use breakpoint mixins like this:
.something {
padding: 5px;
@include media-breakpoint-up(sm) {
padding: 20px;
}
@include media-breakpoint-up(md) {
padding: 40px;
}
}
v4 alpha6 breakpoints reference
Below full options and values.
Breakpoint & up (toggle on value and above):
@include media-breakpoint-up(xs) { ... }
@include media-breakpoint-up(sm) { ... }
@include media-breakpoint-up(md) { ... }
@include media-breakpoint-up(lg) { ... }
@include media-breakpoint-up(xl) { ... }
breakpoint & up values:
// Extra small devices (portrait phones, less than 576px)
// No media query since this is the default in Bootstrap
// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) { ... }
// Medium devices (tablets, 768px and up)
@media (min-width: 768px) { ... }
// Large devices (desktops, 992px and up)
@media (min-width: 992px) { ... }
// Extra large devices (large desktops, 1200px and up)
@media (min-width: 1200px) { ... }
breakpoint & down (toggle on value and down):
@include media-breakpoint-down(xs) { ... }
@include media-breakpoint-down(sm) { ... }
@include media-breakpoint-down(md) { ... }
@include media-breakpoint-down(lg) { ... }
breakpoint & down values:
// Extra small devices (portrait phones, less than 576px)
@media (max-width: 575px) { ... }
// Small devices (landscape phones, less than 768px)
@media (max-width: 767px) { ... }
// Medium devices (tablets, less than 992px)
@media (max-width: 991px) { ... }
// Large devices (desktops, less than 1200px)
@media (max-width: 1199px) { ... }
// Extra large devices (large desktops)
// No media query since the extra-large breakpoint has no upper bound on its width
breakpoint only:
@include media-breakpoint-only(xs) { ... }
@include media-breakpoint-only(sm) { ... }
@include media-breakpoint-only(md) { ... }
@include media-breakpoint-only(lg) { ... }
@include media-breakpoint-only(xl) { ... }
breakpoint only values (toggle in between values only):
// Extra small devices (portrait phones, less than 576px)
@media (max-width: 575px) { ... }
// Small devices (landscape phones, 576px and up)
@media (min-width: 576px) and (max-width: 767px) { ... }
// Medium devices (tablets, 768px and up)
@media (min-width: 768px) and (max-width: 991px) { ... }
// Large devices (desktops, 992px and up)
@media (min-width: 992px) and (max-width: 1199px) { ... }
// Extra large devices (large desktops, 1200px and up)
@media (min-width: 1200px) { ... }
Try this method;
Shorthand method:
let variable1 = '';_x000D_
_x000D_
let variable2 = variable1 || 'new'_x000D_
console.log(variable2); // new
_x000D_
Longhand method:
let variable1 = 'ya';_x000D_
let varibale2;_x000D_
_x000D_
if (variable1 !== null || variable1 !== undefined || variable1 !== '')_x000D_
variable2 = variable1;_x000D_
_x000D_
console.log(variable2); // ya
_x000D_
Use host.docker.internal from Docker 18.03 onwards.
Put the input
in the label, and ditch the for
attribute
<label>
label1:
<input type="text" id="id1" name="whatever" />
</label>
But of course, what if you want to style the text? Just use a span
.
<label id="id1">
<span>label1:</span>
<input type="text" name="whatever" />
</label>
Like others said, you can just loop over the array and print out the elements one by one. To make the output show up as numbers instead of "letters and symbols" you were seeing, you need to convert each element to a string. So your code becomes something like this:
public static void write (String filename, int[]x) throws IOException{
BufferedWriter outputWriter = null;
outputWriter = new BufferedWriter(new FileWriter(filename));
for (int i = 0; i < x.length; i++) {
// Maybe:
outputWriter.write(x[i]+"");
// Or:
outputWriter.write(Integer.toString(x[i]);
outputWriter.newLine();
}
outputWriter.flush();
outputWriter.close();
}
If you just want to print out the array like [1, 2, 3, ....]
, you can replace the loop with this one liner:
outputWriter.write(Arrays.toString(x));
ToInt32 rounds. Casting to int just throws away the non-integer component.
int
and unsigned int
are two distinct integer types. (int
can also be referred to as signed int
, or just signed
; unsigned int
can also be referred to as unsigned
.)
As the names imply, int
is a signed integer type, and unsigned int
is an unsigned integer type. That means that int
is able to represent negative values, and unsigned int
can represent only non-negative values.
The C language imposes some requirements on the ranges of these types. The range of int
must be at least -32767
.. +32767
, and the range of unsigned int
must be at least 0
.. 65535
. This implies that both types must be at least 16 bits. They're 32 bits on many systems, or even 64 bits on some. int
typically has an extra negative value due to the two's-complement representation used by most modern systems.
Perhaps the most important difference is the behavior of signed vs. unsigned arithmetic. For signed int
, overflow has undefined behavior. For unsigned int
, there is no overflow; any operation that yields a value outside the range of the type wraps around, so for example UINT_MAX + 1U == 0U
.
Any integer type, either signed or unsigned, models a subrange of the infinite set of mathematical integers. As long as you're working with values within the range of a type, everything works. When you approach the lower or upper bound of a type, you encounter a discontinuity, and you can get unexpected results. For signed integer types, the problems occur only for very large negative and positive values, exceeding INT_MIN
and INT_MAX
. For unsigned integer types, problems occur for very large positive values and at zero. This can be a source of bugs. For example, this is an infinite loop:
for (unsigned int i = 10; i >= 0; i --) [
printf("%u\n", i);
}
because i
is always greater than or equal to zero; that's the nature of unsigned types. (Inside the loop, when i
is zero, i--
sets its value to UINT_MAX
.)
you can format date just making this type of the code.In javascript.
// for eg.
var inputdate=document.getElementById("getdate").value);
var datecomp= inputdate.split('.');
Var Date= new Date(datecomp[2], datecomp[1]-1, datecomp[0]);
//new date( Year,Month,Date)
Please use count function, Here is a example how to count array in a element
$cars = array("Volvo","BMW","Toyota");
echo count($cars);
The count()
function returns the number of elements in an array.
The sizeof()
function returns the number of elements in an array.
The sizeof()
function is an alias of the count()
function.
On windows, you can print with this command in your CLI
C:\Users\dir\env | more
You can view all environment variables set on your system with the env command. The list is long, so pipe the output through more to make it easier to read.
If you're not in an ipython notebook (like the OP), you can also just declare the size when you declare the figure:
width = 12
height = 12
plt.figure(figsize=(width, height))
Linebreaks are not the same under windows/linux/mac. You should use System.getProperties with the attribute line.separator.
If you want to check or validate a specific UUID version, here are the corresponding regexes.
Note that the only difference is the version number, which is explained in
4.1.3. Version
chapter of UUID 4122 RFC.
The version number is the first character of the third group : [VERSION_NUMBER][0-9A-F]{3}
:
UUID v1 :
/^[0-9A-F]{8}-[0-9A-F]{4}-[1][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
UUID v2 :
/^[0-9A-F]{8}-[0-9A-F]{4}-[2][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
UUID v3 :
/^[0-9A-F]{8}-[0-9A-F]{4}-[3][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
UUID v4 :
/^[0-9A-F]{8}-[0-9A-F]{4}-[4][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
UUID v5 :
/^[0-9A-F]{8}-[0-9A-F]{4}-[5][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
If you hate numpy, get out RPy and your local copy of R, and use it instead.
(I would also echo to make you you really need to invert the matrix. In R, for example, linalg.solve and the solve() function don't actually do a full inversion, since it is unnecessary.)
Use DATE_FORMAT
select DATE_FORMAT(date,'%d') from tablename =>Date only
example:
select DATE_FORMAT(`date_column`,'%d') from `database_name`.`table_name`;
While other suggestions here seem valid, there is one other good reason. With plain String
you have much higher chances of accidentally printing the password to logs, monitors or some other insecure place. char[]
is less vulnerable.
Consider this:
public static void main(String[] args) {
Object pw = "Password";
System.out.println("String: " + pw);
pw = "Password".toCharArray();
System.out.println("Array: " + pw);
}
Prints:
String: Password
Array: [C@5829428e
First, you need to compile your code with appropriate flags, enabling debug into code.
$ gcc -Wall -g -ggdb -o ex1 ex1.c
then just run you code with your favourite debugger
$ gdb ./ex1
show me the code.
(gdb) list
1 #include <stdio.h>
2 int main(void)
3 {
4 int i = 0;
5 for(i=0;i<7;++i)
6 printf("%d\n", i);
7
8 return 0;
9 }
break on lines 5 and looks if i == 5.
(gdb) b 5
Breakpoint 1 at 0x4004fb: file ex1.c, line 5.
(gdb) rwatch i if i==5
Hardware read watchpoint 5: i
checking breakpoints
(gdb) info b
Num Type Disp Enb Address What
1 breakpoint keep y 0x00000000004004fb in main at ex1.c:5
breakpoint already hit 1 time
5 read watchpoint keep y i
stop only if i==5
running the program
(gdb) c
Continuing.
0
1
2
3
4
Hardware read watchpoint 5: i
Value = 5
0x0000000000400523 in main () at ex1.c:5
5 for(i=0;i<7;++i)
As you say, ordinal is a bit risky. Consider for example:
public enum Boolean {
TRUE, FALSE
}
public class BooleanTest {
@Test
public void testEnum() {
assertEquals(0, Boolean.TRUE.ordinal());
assertEquals(1, Boolean.FALSE.ordinal());
}
}
If you stored this as ordinals, you might have rows like:
> SELECT STATEMENT, TRUTH FROM CALL_MY_BLUFF
"Alice is a boy" 1
"Graham is a boy" 0
But what happens if you updated Boolean?
public enum Boolean {
TRUE, FILE_NOT_FOUND, FALSE
}
This means all your lies will become misinterpreted as 'file-not-found'
Better to just use a string representation
Refer this,
boolean check = false;
Button backward_img;
Button backward_img1;
backward_img = (Button) findViewById(R.id.bars_footer_backward);
backward_img1 = (Button) findViewById(R.id.bars_footer_backward1);
backward_img.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
check = true;
backward_img.setBackgroundColor(Color.BLUE);
}
});
if (check == true) {
backward_img1.setBackgroundColor(Color.RED);
backward_img.setBackgroundColor(Color.BLUE);
}
for anyone having problems when using xampp and IIS using windows,
check the xamp panel on apache which port is using
Let assume apache is using port 81
then try this
http://127.0.0.1:81/
for me worked like charm, it might help someone in future
You can create the array in the caller, which is the main function, and pass the array to the callee which is your myFunction(). Thus myFunction can fill the string into the array. However, you need to declare myFunction() as
char* myFunction(char * buf, int buf_len){
strncpy(buf, "my string", buf_len);
return buf;
}
And in main function, myFunction should be called in this way:
char array[51];
memset(array, 0, 51); /* All bytes are set to '\0' */
printf("%s", myFunction(array, 50)); /* The buf_len argument is 50, not 51. This is to make sure the string in buf is always null-terminated (array[50] is always '\0') */
However, a pointer is still used.
var arr = ['a','b',1];
var results = arr.filter(function(item){
if(typeof item ==='string'){return item;}
});
When you have own struct
, you could have own convert-to-string function.
package main
import (
"fmt"
)
type Color struct {
Red int `json:"red"`
Green int `json:"green"`
Blue int `json:"blue"`
}
func (c Color) String() string {
return fmt.Sprintf("[%d, %d, %d]", c.Red, c.Green, c.Blue)
}
func main() {
c := Color{Red: 123, Green: 11, Blue: 34}
fmt.Println(c) //[123, 11, 34]
}
You need to do it like this,
void Yourfunction(List<DateTime> dates )
{
}
Same article on my blog(I like formatting more)
I wrote small article which describe how to make access to your android database thread safe.
Assuming you have your own SQLiteOpenHelper.
public class DatabaseHelper extends SQLiteOpenHelper { ... }
Now you want to write data to database in separate threads.
// Thread 1
Context context = getApplicationContext();
DatabaseHelper helper = new DatabaseHelper(context);
SQLiteDatabase database = helper.getWritableDatabase();
database.insert(…);
database.close();
// Thread 2
Context context = getApplicationContext();
DatabaseHelper helper = new DatabaseHelper(context);
SQLiteDatabase database = helper.getWritableDatabase();
database.insert(…);
database.close();
You will get following message in your logcat and one of your changes will not be written.
android.database.sqlite.SQLiteDatabaseLockedException: database is locked (code 5)
This is happening because every time you create new SQLiteOpenHelper object you are actually making new database connection. If you try to write to the database from actual distinct connections at the same time, one will fail. (from answer above)
To use database with multiple threads we need to make sure we are using one database connection.
Let’s make singleton class Database Manager which will hold and return single SQLiteOpenHelper object.
public class DatabaseManager {
private static DatabaseManager instance;
private static SQLiteOpenHelper mDatabaseHelper;
public static synchronized void initializeInstance(SQLiteOpenHelper helper) {
if (instance == null) {
instance = new DatabaseManager();
mDatabaseHelper = helper;
}
}
public static synchronized DatabaseManager getInstance() {
if (instance == null) {
throw new IllegalStateException(DatabaseManager.class.getSimpleName() +
" is not initialized, call initialize(..) method first.");
}
return instance;
}
public SQLiteDatabase getDatabase() {
return new mDatabaseHelper.getWritableDatabase();
}
}
Updated code which write data to database in separate threads will look like this.
// In your application class
DatabaseManager.initializeInstance(new MySQLiteOpenHelper());
// Thread 1
DatabaseManager manager = DatabaseManager.getInstance();
SQLiteDatabase database = manager.getDatabase()
database.insert(…);
database.close();
// Thread 2
DatabaseManager manager = DatabaseManager.getInstance();
SQLiteDatabase database = manager.getDatabase()
database.insert(…);
database.close();
This will bring you another crash.
java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase
Since we are using only one database connection, method getDatabase() return same instance of SQLiteDatabase object for Thread1 and Thread2. What is happening, Thread1 may close database, while Thread2 is still using it. That’s why we have IllegalStateException crash.
We need to make sure no-one is using database and only then close it. Some folks on stackoveflow recommended to never close your SQLiteDatabase. This will result in following logcat message.
Leak found
Caused by: java.lang.IllegalStateException: SQLiteDatabase created and never closed
public class DatabaseManager {
private int mOpenCounter;
private static DatabaseManager instance;
private static SQLiteOpenHelper mDatabaseHelper;
private SQLiteDatabase mDatabase;
public static synchronized void initializeInstance(SQLiteOpenHelper helper) {
if (instance == null) {
instance = new DatabaseManager();
mDatabaseHelper = helper;
}
}
public static synchronized DatabaseManager getInstance() {
if (instance == null) {
throw new IllegalStateException(DatabaseManager.class.getSimpleName() +
" is not initialized, call initializeInstance(..) method first.");
}
return instance;
}
public synchronized SQLiteDatabase openDatabase() {
mOpenCounter++;
if(mOpenCounter == 1) {
// Opening new database
mDatabase = mDatabaseHelper.getWritableDatabase();
}
return mDatabase;
}
public synchronized void closeDatabase() {
mOpenCounter--;
if(mOpenCounter == 0) {
// Closing database
mDatabase.close();
}
}
}
Use it as follows.
SQLiteDatabase database = DatabaseManager.getInstance().openDatabase();
database.insert(...);
// database.close(); Don't close it directly!
DatabaseManager.getInstance().closeDatabase(); // correct way
Every time you need database you should call openDatabase() method of DatabaseManager class. Inside this method, we have a counter, which indicate how many times database is opened. If it equals to one, it means we need to create new database connection, if not, database connection is already created.
The same happens in closeDatabase() method. Every time we call this method, counter is decreased, whenever it goes to zero, we are closing database connection.
Now you should be able to use your database and be sure it's thread safe.
Reviving an old question because it seems to appear at the top of search results.
I wanted to retain transition effects while still being able to style the actionlink so I came up with this solution.
<div class="parent-style-one"> @Html.ActionLink("Homepage", "Home", "Home") </div>
.parent-style-one { /* your styles here */ }
.parent-style-one a { text-decoration: none; }
.parent-style-one a:hover { text-decoration: underline; -webkit-transition-duration: 1.1s; /* Safari */ transition-duration: 1.1s; }
This way I only target the child elements of the div in this case the action link and still be able to apply transition effects.
try below:
var temp_datetime_obj = new Date();
collection.find({
start_date:{
$gte: new Date(temp_datetime_obj.toISOString())
}
}).toArray(function(err, items) {
/* you can console.log here */
});
SET NOCOUNT ON;
declare @PATH VARCHAR(200)='D:\MyBackupFolder\'
-- path where you want to take backups
IF OBJECT_ID('TEMPDB..#back') IS NOT NULL
DROP TABLE #back
CREATE TABLE #back
(
RN INT IDENTITY (1,1),
DatabaseName NVARCHAR(200)
)
INSERT INTO #back
SELECT 'MyDatabase1'
UNION SELECT 'MyDatabase2'
UNION SELECT 'MyDatabase3'
UNION SELECT 'MyDatabase4'
-- your databases List
DECLARE @COUNT INT =0 , @RN INT =1, @SCRIPT NVARCHAR(MAX)='', @DBNAME VARCHAR(200)
PRINT '---------------------FULL BACKUP SCRIPT-------------------------'+CHAR(10)
SET @COUNT = (SELECT COUNT(*) FROM #back)
PRINT 'USE MASTER'+CHAR(10)
WHILE(@COUNT > = @RN)
BEGIN
SET @DBNAME =(SELECT DatabaseName FROM #back WHERE RN=@RN)
SET @SCRIPT ='BACKUP DATABASE ' +'['+@DBNAME+']'+CHAR(10)+'TO DISK =N'''+@PATH+@DBNAME+ N'_Backup_'
+ REPLACE ( REPLACE ( REPLACE ( REPLACE ( CAST ( CAST ( GETDATE () AS DATETIME2 ) AS VARCHAR ( 100 )), '-' , '_' ), ' ' , '_' ), '.' , '_' ), ':' , '' )+'.bak'''+CHAR(10)+'WITH COMPRESSION, STATS = 10'+CHAR(10)+'GO'+CHAR(10)
PRINT @SCRIPT
SET @RN=@RN+1
END
PRINT '---------------------DIFF BACKUP SCRIPT-------------------------'+CHAR(10)
SET @COUNT =0 SET @RN =1 SET @SCRIPT ='' SET @DBNAME =''
SET @COUNT = (SELECT COUNT(*) FROM #back)
PRINT 'USE MASTER'+CHAR(10)
WHILE(@COUNT > = @RN)
BEGIN
SET @DBNAME =(SELECT DatabaseName FROM #back WHERE RN=@RN)
SET @SCRIPT ='BACKUP DATABASE ' +'['+@DBNAME+']'+CHAR(10)+'TO DISK =N'''+@PATH+@DBNAME+ N'_Backup_'
+ REPLACE ( REPLACE ( REPLACE ( REPLACE ( CAST ( CAST ( GETDATE () AS DATETIME2 ) AS VARCHAR ( 100 )), '-' , '_' ), ' ' , '_' ), '.' , '_' ), ':' , '' )+'.diff'''+CHAR(10)+'WITH DIFFERENTIAL, COMPRESSION, STATS = 10'+CHAR(10)+'GO'+CHAR(10)
PRINT @SCRIPT
SET @RN=@RN+1
END
For express ~4.16.0, express.json with limit works directly
app.use(express.json({limit: '50mb'}));
I use withRouter
to get the location
prop. When the component is updated because of a new route, I check if the value changed:
@withRouter
class App extends React.Component {
static propTypes = {
location: React.PropTypes.object.isRequired
}
// ...
componentDidUpdate(prevProps) {
if (this.props.location !== prevProps.location) {
this.onRouteChanged();
}
}
onRouteChanged() {
console.log("ROUTE CHANGED");
}
// ...
render(){
return <Switch>
<Route path="/" exact component={HomePage} />
<Route path="/checkout" component={CheckoutPage} />
<Route path="/success" component={SuccessPage} />
// ...
<Route component={NotFound} />
</Switch>
}
}
Hope it helps
You can use .resize()
to get every time the width/height actually changes, like this:
$(window).resize(function() {
//resize just happened, pixels changed
});
You can view a working demo here, it takes the new height/width values and updates them in the page for you to see. Remember the event doesn't really start or end, it just "happens" when a resize occurs...there's nothing to say another one won't happen.
Edit: By comments it seems you want something like a "on-end" event, the solution you found does this, with a few exceptions (you can't distinguish between a mouse-up and a pause in a cross-browser way, the same for an end vs a pause). You can create that event though, to make it a bit cleaner, like this:
$(window).resize(function() {
if(this.resizeTO) clearTimeout(this.resizeTO);
this.resizeTO = setTimeout(function() {
$(this).trigger('resizeEnd');
}, 500);
});
You could have this is a base file somewhere, whatever you want to do...then you can bind to that new resizeEnd
event you're triggering, like this:
$(window).bind('resizeEnd', function() {
//do something, window hasn't changed size in 500ms
});
Using VS 2010:
Let's say you have a Windows.Forms project. You add a UserControl (say MyControl) to the project, and design it all up. Now you want to add it to your toolbox.
As soon as the project is successfully built once, it will appear in your Framework Components. Right click the Toolbox to get the context menu, select "Choose Items...", and browse to the name of your control (MyControl) under the ".NET Framework Components" tab.
Advantage over using dlls: you can edit the controls in the same project as your form, and the form will build with the new controls. However, the control will only be avilable to this project.
Note: If the control has build errors, resolve them before moving on to the containing forms, or the designer has a heart attack.
I threw together a small test implementation of this. The basic idea is to call format
and pass in the format string, and a map of objects, and the names that they have locally.
The output of the following is:
My dog is named fido, and Jane Doe owns him.
public class StringFormatter {
private static final String fieldStart = "\\$\\{";
private static final String fieldEnd = "\\}";
private static final String regex = fieldStart + "([^}]+)" + fieldEnd;
private static final Pattern pattern = Pattern.compile(regex);
public static String format(String format, Map<String, Object> objects) {
Matcher m = pattern.matcher(format);
String result = format;
while (m.find()) {
String[] found = m.group(1).split("\\.");
Object o = objects.get(found[0]);
Field f = o.getClass().getField(found[1]);
String newVal = f.get(o).toString();
result = result.replaceFirst(regex, newVal);
}
return result;
}
static class Dog {
public String name;
public String owner;
public String gender;
}
public static void main(String[] args) {
Dog d = new Dog();
d.name = "fido";
d.owner = "Jane Doe";
d.gender = "him";
Map<String, Object> map = new HashMap<String, Object>();
map.put("d", d);
System.out.println(
StringFormatter.format(
"My dog is named ${d.name}, and ${d.owner} owns ${d.gender}.",
map));
}
}
Note: This doesn't compile due to unhandled exceptions. But it makes the code much easier to read.
Also, I don't like that you have to construct the map yourself in the code, but I don't know how to get the names of the local variables programatically. The best way to do it, is to remember to put the object in the map as soon as you create it.
The following example produces the results that you want from your example:
public static void main(String[] args) {
Map<String, Object> map = new HashMap<String, Object>();
Site site = new Site();
map.put("site", site);
site.name = "StackOverflow.com";
User user = new User();
map.put("user", user);
user.name = "jjnguy";
System.out.println(
format("Hello ${user.name},\n\tWelcome to ${site.name}. ", map));
}
I should also mention that I have no idea what Velocity is, so I hope this answer is relevant.
Have you tried JQuery? Vanilla javascript can be tough. Try using this:
$('.container-element').add('<div>Insert Div Content</div>');
.container-element
is a JQuery selector that marks the element with the class "container-element" (presumably the parent element in which you want to insert your divs). Then the add()
function inserts HTML into the container-element.
Also, if you cannot find your eclipse dir. Because, I had such problem on mac we can remember that eclipse is using OSGi, so we can go to Target Platform and disable features/plugins that were described above: org.eclipse.jpt.*
Newer versions of MongoDB support bulk operations:
var col = db.collection('people');
var batch = col.initializeUnorderedBulkOp();
batch.insert({name: "John"});
batch.insert({name: "Jane"});
batch.insert({name: "Jason"});
batch.insert({name: "Joanne"});
batch.execute(function(err, result) {
if (err) console.error(err);
console.log('Inserted ' + result.nInserted + ' row(s).');
}
The solution that work for is were add the next dependency to my pom.xml file.
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
SELECT SUBSTR(TRIM(rtp.role),1,12) AS ROLE
, SUBSTR(rp.grantee,1,16) AS GRANTEE
, SUBSTR(TRIM(rtp.privilege),1,12) AS PRIVILEGE
, SUBSTR(TRIM(rtp.owner),1,12) AS OWNER
, SUBSTR(TRIM(rtp.table_name),1,28) AS TABLE_NAME
, SUBSTR(TRIM(rtp.column_name),1,20) AS COLUMN_NAME
, SUBSTR(rtp.common,1,4) AS COMMON
, SUBSTR(rtp.grantable,1,4) AS GRANTABLE
, SUBSTR(rp.default_role,1,16) AS DEFAULT_ROLE
, SUBSTR(rp.admin_option,1,4) AS ADMIN_OPTION
FROM role_tab_privs rtp
LEFT JOIN dba_role_privs rp
ON (rtp.role = rp.granted_role)
WHERE ('&1' IS NULL OR UPPER(rtp.role) LIKE UPPER('%&1%'))
AND ('&2' IS NULL OR UPPER(rp.grantee) LIKE UPPER('%&2%'))
AND ('&3' IS NULL OR UPPER(rtp.table_name) LIKE UPPER('%&3%'))
AND ('&4' IS NULL OR UPPER(rtp.owner) LIKE UPPER('%&4%'))
ORDER BY 1
, 2
, 3
, 4
;
SQLPLUS> @all_roles '' '' '' '' '' ''
SQLPLUS> @all_roles 'somerol' '' '' '' '' ''
SQLPLUS> @all_roles 'roler' 'username' '' '' '' ''
SQLPLUS> @all_roles '' '' 'part-of-database-package-name' '' '' ''
etc.
static void Main(string[] args)
{
Console.WriteLine("Enter a string to check pallingdrome i.e startreverse is same");
string str = Convert.ToString( Console.ReadLine());
char[] arr = str.ToCharArray();
var strLength = arr.Length-1;
string newStr = "";
for (var i= strLength; i < arr.Length; i--)
{
newStr = newStr + Convert.ToString(arr[i]);
if(i==0)
{
break;
}
}
if(str==newStr)
{
Console.WriteLine("Entered key is Palindrome");
Console.ReadLine();
}
else
{
Console.WriteLine("Entered key is not Palindrome");
Console.ReadLine();
}
}
You can do this by providing in class numbers
:
By the way, there is a strong convention that Java class names are uppercased.
Case 1 (simple getter):
public class Numbers {
private List<Integer> list;
public List<Integer> getList() { return list; }
...
}
Case 2 (non-modifiable wrapper):
public class Numbers {
private List<Integer> list;
public List<Integer> getList() { return Collections.unmodifiableList( list ); }
...
}
Case 3 (specific methods):
public class Numbers {
private List<Integer> list;
public void addToList( int i ) { list.add(i); }
public int getValueAtIndex( int index ) { return list.get( index ); }
...
}
The simplest short form to me is something like:
#find web forms in my project except in compilation directories
(gci -recurse -path *.aspx,*.ascx).fullname -inotmatch '\\obj\\|\\bin\\'
And if you need more complex logic then use a filter:
filter Filter-DirectoryBySomeLogic{
param(
[Parameter(Mandatory=$true,ValueFromPipeline=$true)]
$fsObject,
[switch]$exclude
)
if($fsObject -is [System.IO.DirectoryInfo])
{
$additional_logic = $true ### replace additional logic here
if($additional_logic){
if(!$exclude){ return $fsObject }
}
elseif($exclude){ return $fsObject }
}
}
gci -Directory -Recurse | Filter-DirectoryBySomeLogic | ....
Also worth noting window.scrollBy(dx,dy)
(ref)
wget --spider -S "http://url/to/be/checked" 2>&1 | grep "HTTP/" | awk '{print $2}'
prints only the status code for you
To pass an array of values to any function that normally expects them to be separate parameters, use Function.prototype.apply
, so in this case you need:
$.when.apply($, my_array).then( ___ );
See http://jsfiddle.net/YNGcm/21/
In ES6, you can use the ...
spread operator instead:
$.when(...my_array).then( ___ );
In either case, since it's unlikely that you'll known in advance how many formal parameters the .then
handler will require, that handler would need to process the arguments
array in order to retrieve the result of each promise.
Declare a Flask endpoint to accept POST input type and then do necessary steps. Use jQuery to post the data.
from flask import request
@app.route('/parse_data', methods=['GET', 'POST'])
def parse_data(data):
if request.method == "POST":
#perform action here
var value = $('.textbox').val();
$.ajax({
type: 'POST',
url: "{{ url_for('parse_data') }}",
data: JSON.stringify(value),
contentType: 'application/json',
success: function(data){
// do something with the received data
}
});
A very typical approach to this type of problem is to use row_number()
:
select t.*
from (select t.*,
row_number() over (partition by number order by id) as seqnum
from t
) t
where seqnum = 1;
This is more generalizable than using a comparison to the minimum id. For instance, you can get a random row by using order by newid()
. You can select 2 rows by using where seqnum <= 2
.
Instead of .First()
change it to .FirstOrDefault()
You are doing everything right, except passing your bundle path to asset()
function.
According to documentation - in your example this should look like below:
{{ asset('bundles/webshome/css/main.css') }}
Tip: you also can call assets:install with --symlink
key, so it will create symlinks in web folder. This is extremely useful when you often apply js
or css
changes (in this way your changes, applied to src/YouBundle/Resources/public
will be immediately reflected in web
folder without need to call assets:install
again):
app/console assets:install web --symlink
Also, if you wish to add some assets in your child template, you could call parent()
method for the Twig block. In your case it would be like this:
{% block stylesheets %}
{{ parent() }}
<link href="{{ asset('bundles/webshome/css/main.css') }}" rel="stylesheet">
{% endblock %}
I have tried all of the listed questions, but all of them not work for my task: using specific yaml file for some unit test. In my case, it works like this:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(initializers = {ConfigFileApplicationContextInitializer.class})
@TestPropertySource(properties = {"spring.config.location=file:../path/to/specific/config/application.yml"})
public class SomeTest {
@Value("${my.property.value:#{null}}")
private String value;
@Test
public void test() {
System.out.println("value = " + value);
}
}
Assuming you wanted to do this synchronously, using the WebClient.OpenRead(...) method and setting the timeout on the Stream that it returns will give you the desired result:
using (var webClient = new WebClient())
using (var stream = webClient.OpenRead(streamingUri))
{
if (stream != null)
{
stream.ReadTimeout = Timeout.Infinite;
using (var reader = new StreamReader(stream, Encoding.UTF8, false))
{
string line;
while ((line = reader.ReadLine()) != null)
{
if (line != String.Empty)
{
Console.WriteLine("Count {0}", count++);
}
Console.WriteLine(line);
}
}
}
}
Deriving from WebClient and overriding GetWebRequest(...) to set the timeout @Beniamin suggested, didn't work for me as, but this did.
i had this problem yesterday. can you folow the local path in windows explorer?
(C:\users\..\AndroidStudioProjects\SharedPreferencesDemoProject\SharedPreferencesDemo\build\apk\)
i had to manually create the 'apk' directory in '\build', then the problem was fixed
How do I check if something is (not) in a list in Python?
The cheapest and most readable solution is using the in
operator (or in your specific case, not in
). As mentioned in the documentation,
The operators
in
andnot in
test for membership.x in s
evaluates toTrue
ifx
is a member ofs
, andFalse
otherwise.x not in s
returns the negation ofx in s
.
Additionally,
The operator
not in
is defined to have the inverse true value ofin
.
y not in x
is logically the same as not y in x
.
Here are a few examples:
'a' in [1, 2, 3]
# False
'c' in ['a', 'b', 'c']
# True
'a' not in [1, 2, 3]
# True
'c' not in ['a', 'b', 'c']
# False
This also works with tuples, since tuples are hashable (as a consequence of the fact that they are also immutable):
(1, 2) in [(3, 4), (1, 2)]
# True
If the object on the RHS defines a __contains__()
method, in
will internally call it, as noted in the last paragraph of the Comparisons section of the docs.
...
in
andnot in
, are supported by types that are iterable or implement the__contains__()
method. For example, you could (but shouldn't) do this:
[3, 2, 1].__contains__(1)
# True
in
short-circuits, so if your element is at the start of the list, in
evaluates faster:
lst = list(range(10001))
%timeit 1 in lst
%timeit 10000 in lst # Expected to take longer time.
68.9 ns ± 0.613 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
178 µs ± 5.01 µs per loop (mean ± std. dev. of 7 runs, 10000 loops each)
If you want to do more than just check whether an item is in a list, there are options:
list.index
can be used to retrieve the index of an item. If that element does not exist, a ValueError
is raised.list.count
can be used if you want to count the occurrences.set
s?Ask yourself these questions:
hash
on them?If you answered "yes" to these questions, you should be using a set
instead. An in
membership test on list
s is O(n) time complexity. This means that python has to do a linear scan of your list, visiting each element and comparing it against the search item. If you're doing this repeatedly, or if the lists are large, this operation will incur an overhead.
set
objects, on the other hand, hash their values for constant time membership check. The check is also done using in
:
1 in {1, 2, 3}
# True
'a' not in {'a', 'b', 'c'}
# False
(1, 2) in {('a', 'c'), (1, 2)}
# True
If you're unfortunate enough that the element you're searching/not searching for is at the end of your list, python will have scanned the list upto the end. This is evident from the timings below:
l = list(range(100001))
s = set(l)
%timeit 100000 in l
%timeit 100000 in s
2.58 ms ± 58.9 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
101 ns ± 9.53 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
As a reminder, this is a suitable option as long as the elements you're storing and looking up are hashable. IOW, they would either have to be immutable types, or objects that implement __hash__
.
asdf
These days I suggest using asdf to install various versions of Python interpreters next to each other.
Note1: asdf
works not only for Python but for all major languages.
Note2: asdf
works fine in combination with popular package-managers such as pipenv and poetry.
If you have asdf installed you can easily download/install new Python interpreters:
# Install Python plugin for asdf:
asdf plugin-add python
# List all available Python interpreters:
asdf list-all python
# Install the Python interpreters that you need:
asdf install python 3.7.4
asdf install python 3.6.9
# etc...
# If you want to define the global version:
asdf global python 3.7.4
# If you want to define the local (project) version:
# (this creates a file .tool-versions in the current directory.)
asdf local python 3.7.4
If you need to install multiple versions of Python (next to the main one) on Ubuntu / Mint: (should work similar on other Unixs'.)
1) Install Required Packages for source compilation
$ sudo apt-get install build-essential checkinstall
$ sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev
2) Download and extract desired Python version
Download Python Source for Linux as tarball and move it to /usr/src
.
Extract the downloaded package in place. (replace the 'x's with your downloaded version)
$ sudo tar xzf Python-x.x.x.tgz
3) Compile and Install Python Source
$ cd Python-x.x.x
$ sudo ./configure
$ sudo make altinstall
Your new Python bin is now located in /usr/local/bin
. You can test the new version:
$ pythonX.X -V
Python x.x.x
$ which pythonX.X
/usr/local/bin/pythonX.X
# Pip is now available for this version as well:
$ pipX.X -V
pip X.X.X from /usr/local/lib/pythonX.X/site-packages (python X.X)
4 possible ways, use one you need.
val ll = findViewById<LinearLayout>(R.id.your_layout_id)
ll.setBackgroundColor(ContextCompat.getColor(this, R.color.white))
<LinearLayout
android:background="@{@color/white}"
OR more useful statement-
<LinearLayout
android:background="@{model.colorResId}"
<LinearLayout
android:background="#FFFFFF"
<LinearLayout
android:background="@color/white"
LinearLayout ll = (LinearLayout) findViewById(R.id.your_layout_id);
ll.setBackgroundColor(ContextCompat.getColor(this, R.color.white));
This works for SQL Server Management Studio v18.0
The file "SqlStudio.bin" doesn't seem to exist any longer. Instead my settings are all stored in this file:
C:\Users\*********\AppData\Roaming\Microsoft\SQL Server Management Studio\18.0\UserSettings.xml
<Element>.......</Element>
block
that surrounds it.$UUID_RE = join '-', map { "[0-9a-f]{$_}" } 8, 4, 4, 4, 12;
BTW, allowing only 4 on one of the positions is only valid for UUIDv4. But v4 is not the only UUID version that exists. I have met v1 in my practice as well.
Here is how you define a react onClick event handler, which was answering the question title... using es6 syntax
import React, { Component } from 'react';
export default class Test extends Component {
handleClick(e) {
e.preventDefault()
console.log(e.target)
}
render() {
return (
<a href='#' onClick={e => this.handleClick(e)}>click me</a>
)
}
}
This appears to be missing the providerName="System.Data.EntityClient"
bit. Sure you got the whole thing?
Building off of Master DJon
Here is simplified function which provides the added utility of returning depth (in case you want to use logic to include the parent task or search at a specific depth)
DELIMITER $$
FUNCTION `childDepth`(pParentId INT, pId INT) RETURNS int(11)
READS SQL DATA
DETERMINISTIC
BEGIN
DECLARE depth,curId int;
SET depth = 0;
SET curId = pId;
WHILE curId IS not null AND curId <> pParentId DO
SELECT ParentId from test where id=curId limit 1 into curId;
SET depth = depth + 1;
END WHILE;
IF curId IS NULL THEN
set depth = -1;
END IF;
RETURN depth;
END$$
Usage:
select * from test where childDepth(1, id) <> -1;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.*;
/* Write an application that prompts the user for a String that contains at least
* five letters and at least five digits. Continuously re-prompt the user until a
* valid String is entered. Display a message indicating whether the user was
* successful or did not enter enough digits, letters, or both.
*/
public class FiveLettersAndDigits {
private static String readIn() { // read input from stdin
StringBuilder sb = new StringBuilder();
int c = 0;
try { // do not use try-with-resources. We don't want to close the stdin stream
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
while ((c = reader.read()) != 0) { // read all characters until null
// We don't want new lines, although we must consume them.
if (c != 13 && c != 10) {
sb.append((char) c);
} else {
break; // break on new line (or else the loop won't terminate)
}
}
// reader.readLine(); // get the trailing new line
} catch (IOException ex) {
System.err.println("Failed to read user input!");
ex.printStackTrace(System.err);
}
return sb.toString().trim();
}
/**
* Check the given input against a pattern
*
* @return the number of matches
*/
private static int getitemCount(String input, String pattern) {
int count = 0;
try {
Pattern p = Pattern.compile(pattern);
Matcher m = p.matcher(input);
while (m.find()) { // count the number of times the pattern matches
count++;
}
} catch (PatternSyntaxException ex) {
System.err.println("Failed to test input String \"" + input + "\" for matches to pattern \"" + pattern + "\"!");
ex.printStackTrace(System.err);
}
return count;
}
private static String reprompt() {
System.out.print("Entered input is invalid! Please enter five letters and five digits in any order: ");
String in = readIn();
return in;
}
public static void main(String[] args) {
int letters = 0, digits = 0;
String in = null;
System.out.print("Please enter five letters and five digits in any order: ");
in = readIn();
while (letters < 5 || digits < 5) { // will keep occuring until the user enters sufficient input
if (null != in && in.length() > 9) { // must be at least 10 chars long in order to contain both
// count the letters and numbers. If there are enough, this loop won't happen again.
letters = getitemCount(in, "[A-Za-z]");
digits = getitemCount(in, "[0-9]");
if (letters < 5 || digits < 5) {
in = reprompt(); // reset in case we need to go around again.
}
} else {
in = reprompt();
}
}
}
}
for example:
Connection conn = null; PreparedStatement sth = null; ResultSet rs =null; try { conn = delegate.getConnection(); sth = conn.prepareStatement(INSERT_SQL); sth.setString(1, pais.getNombre()); sth.executeUpdate(); rs=sth.getGeneratedKeys(); if(rs.next()){ Integer id = (Integer) rs.getInt(1); pais.setId(id); } }
with ,Statement.RETURN_GENERATED_KEYS);"
no found.
run sbt console then type sbtVersion
to check sbt version, and scalaVersion
for scala version
A simple way would be:
var newDt= dt.AsEnumerable()
.GroupBy(x => x.Field<int>("ColumnName"))
.Select(y => y.First())
.CopyToDataTable();
KeyStore Explorer is an open source GUI replacement for the Java command-line utilities keytool and jarsigner. KeyStore Explorer presents their functionality, and more, via an intuitive graphical user interface.
You can find it in Nuget Package Microsoft ASP.NET Web Pages Version 3.2.0
If you have a reference to an earlier version than 3.0.0.0, Delete the reference, add the reference to the correct .dll in your packages folder and make sure "Copy Local" is set to "True" in the properties of the .dll.
Then in your web.config (as mentioned by @MichaelEvanchik)
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.WebPages.Razor" PublicKeyToken="31bf3856ad364e35"/>
<bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/>
</dependentAssembly>
</assemblyBinding>
On an object, you can achieve this with setattr
>>> class A(object): pass
>>> a=A()
>>> setattr(a, "hello1", 5)
>>> a.hello1
5
Don't try this, totally un-recommend, don't do this:
import string
s='ABCD'
print(''.join([string.ascii_lowercase[string.ascii_uppercase.index(i)] for i in s]))
Output:
abcd
Since no one wrote it yet you can use swapcase
(so uppercase letters will become lowercase, and vice versa) (and this one you should use in cases where i just mentioned (convert upper to lower, lower to upper)):
s='ABCD'
print(s.swapcase())
Output:
abcd
inline if:
(('hypothesis') ? 'truthy conclusion' : 'falsey conclusion')
truthy conclusion: statements executed when hypothesis is true
falsey conclusion: statements executed when hypothesis is false
your example:
var c = ((a < b) ? 'a<b statements' : '!(a<b) statements');
There is one more option to rename field:
Useful if you deal with third party classes, which you are not able to annotate, or you just do not want to pollute the class with Jackson specific annotations.
The Jackson documentation for Mixins is outdated, so this example can provide more clarity. In essence: you create mixin class which does the serialization in the way you want. Then register it to the ObjectMapper:
objectMapper.addMixIn(ThirdParty.class, MyMixIn.class);
You can also try using multiprocessing.Process
with daemon=True
; the process.start()
method does not block and you can return a response/status immediately to the caller while your expensive function executes in the background.
I experienced similar problem while working with falcon framework and using daemon
process helped.
You'd need to do the following:
from multiprocessing import Process
@app.route('/render/<id>', methods=['POST'])
def render_script(id=None):
...
heavy_process = Process( # Create a daemonic process with heavy "my_func"
target=my_func,
daemon=True
)
heavy_process.start()
return Response(
mimetype='application/json',
status=200
)
# Define some heavy function
def my_func():
time.sleep(10)
print("Process finished")
You should get a response immediately and, after 10s you should see a printed message in the console.
NOTE: Keep in mind that daemonic
processes are not allowed to spawn any child processes.
You could use cast
(as int) after replacing NaN
with 0
,
data_df = df.withColumn("Plays", df.call_time.cast('float'))
install phpXX-extension by PHP. In my FreeBSD's case:
pkg install php74-extensions
I created a new VB.Net Wpf project. I created one TextBox and used the following for the codebehind:
Class MainWindow
Sub New()
' This call is required by the designer.
InitializeComponent()
' Add any initialization after the InitializeComponent() call.
AddHandler PreviewMouseLeftButtonDown, New MouseButtonEventHandler(AddressOf SelectivelyIgnoreMouseButton)
AddHandler GotKeyboardFocus, New KeyboardFocusChangedEventHandler(AddressOf SelectAllText)
AddHandler MouseDoubleClick, New MouseButtonEventHandler(AddressOf SelectAllText)
End Sub
Private Shared Sub SelectivelyIgnoreMouseButton(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
' Find the TextBox
Dim parent As DependencyObject = TryCast(e.OriginalSource, UIElement)
While parent IsNot Nothing AndAlso Not (TypeOf parent Is TextBox)
parent = VisualTreeHelper.GetParent(parent)
End While
If parent IsNot Nothing Then
Dim textBox As Object = DirectCast(parent, TextBox)
If Not textBox.IsKeyboardFocusWithin Then
' If the text box is not yet focussed, give it the focus and
' stop further processing of this click event.
textBox.Focus()
e.Handled = True
End If
End If
End Sub
Private Shared Sub SelectAllText(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim textBox As Object = TryCast(e.OriginalSource, TextBox)
If textBox IsNot Nothing Then
textBox.SelectAll()
End If
End Sub
End Class
You must handle ArrayIndexOutOfBounds by yourself when adding to a certain position.
For convenience, you may use this extension function in Kotlin
/**
* Adds an [element] to index [index] or to the end of the List in case [index] is out of bounds
*/
fun <T> MutableList<T>.insert(index: Int, element: T) {
if (index <= size) {
add(index, element)
} else {
add(element)
}
}
You might need to change your path by:
import os
path=os.chdir(str('Here should be the path to your file')) #This command changes directory
This is what worked for me at least! Hope it works for you too!
key = "".join( chr( val ) for val in myList )
The code:
$qrystr = "SELECT * FROM mytablename WHERE id= " . $rowid;
$qryresult = $this->connection->query($qrystr);
$result = $qryresult->fetchAll(PDO::FETCH_ASSOC);
unset($result[0]['id']); //Remove ID from array
$qrystr = " INSERT INTO mytablename";
$qrystr .= " ( " .implode(", ",array_keys($result[0])).") ";
$qrystr .= " VALUES ('".implode("', '",array_values($result[0])). "')";
$result = $this->connection->query($qrystr);
return $result;
Of course you should use PDO:bindparam and check your variables against attack, etc but gives the example
additional info
If you have a problem with handling NULL
values, you can use following codes so that imploding
names and values only for whose value is not NULL
.
foreach ($result[0] as $index => $value) {
if ($value === null) unset($result[0][$index]);
}
Tim Cas one liner is amazing for strings obtained by a call to fgets, because you know they contain a single newline at the end.
If you are in a different context and want to handle strings that may contain more than one newline, you might be looking for strrspn. It is not POSIX, meaning you will not find it on all Unices. I wrote one for my own needs.
/* Returns the length of the segment leading to the last
characters of s in accept. */
size_t strrspn (const char *s, const char *accept)
{
const char *ch;
size_t len = strlen(s);
more:
if (len > 0) {
for (ch = accept ; *ch != 0 ; ch++) {
if (s[len - 1] == *ch) {
len--;
goto more;
}
}
}
return len;
}
For those looking for a Perl chomp equivalent in C, I think this is it (chomp only removes the trailing newline).
line[strrspn(string, "\r\n")] = 0;
The strrcspn function:
/* Returns the length of the segment leading to the last
character of reject in s. */
size_t strrcspn (const char *s, const char *reject)
{
const char *ch;
size_t len = strlen(s);
size_t origlen = len;
while (len > 0) {
for (ch = reject ; *ch != 0 ; ch++) {
if (s[len - 1] == *ch) {
return len;
}
}
len--;
}
return origlen;
}
You can achieve this by deploying something at a higher layer than namespaced Services, like the service loadbalancer https://github.com/kubernetes/contrib/tree/master/service-loadbalancer. If you want to restrict it to a single namespace, use "--namespace=ns" argument (it defaults to all namespaces: https://github.com/kubernetes/contrib/blob/master/service-loadbalancer/service_loadbalancer.go#L715). This works well for L7, but is a little messy for L4.
This simple demo may help you in getting what you want. Here is the html/php code from where you want to upload the image:
<html>
<head>
<script src="http://cdn.ckeditor.com/4.6.2/standard-all/ckeditor.js"></script>
</head>
<body>
<form action="index.php" method="POST" style="width:500xp;">
<textarea rows="5" name="content" id="content"></textarea>
<br>
<input type="submit" name="submit" value="Post">
</form>
<script>
CKEDITOR.replace( 'content', {
height: 300,
filebrowserUploadUrl: "upload.php"
});
</script>
</body>
</html>
and here is the code for upload.php file.
<?php
if(isset($_FILES['upload']['name']))
{
$file = $_FILES['upload']['tmp_name'];
$file_name = $_FILES['upload']['name'];
$file_name_array = explode(".", $file_name);
$extension = end($file_name_array);
//we want to save the image with timestamp and randomnumber
$new_image_name = time() . rand(). '.' . $extension;
chmod('upload', 0777);
$allowed_extension = array("jpg", "gif", "png");
if(in_array($extension, $allowed_extension))
{
move_uploaded_file($file, 'upload/' . $new_image_name);
$function_number = $_GET['CKEditorFuncNum'];
$url = 'upload/' . $new_image_name;
$message = '';
echo "<script type='text/javascript'>window.parent.CKEDITOR.tools.callFunction($function_number, '$url', '$message');</script>";
}
}
?>
Note: Don't forget to create a folder "upload" in the same folder and keep all the three files in the same directory. Later you may change their directories once you understand how it works. Also not forget to press send it to the server as shown in picture below.
you can write .WorkbookConnection.Delete after .Refresh BackgroundQuery:=False this will delete text file external connection.
That's a good problem. In order to solve that problem you will also have to disable ASLR otherwise the address of g() will be unpredictable.
Disable ASLR:
sudo bash -c 'echo 0 > /proc/sys/kernel/randomize_va_space'
Disable canaries:
gcc overflow.c -o overflow -fno-stack-protector
After canaries and ASLR are disabled it should be a straight forward attack like the ones described in Smashing the Stack for Fun and Profit
Here is a list of security features used in ubuntu: https://wiki.ubuntu.com/Security/Features You don't have to worry about NX bits, the address of g() will always be in a executable region of memory because it is within the TEXT memory segment. NX bits only come into play if you are trying to execute shellcode on the stack or heap, which is not required for this assignment.
Now go and clobber that EIP!
Use System.Data
namespace then you will get .AsEnumerable()
.
If you're in local machine then use this command
/usr/local/mysql/bin/mysqldump -h127.0.0.1 --port = 3306 -u [username] -p [password] --databases [db_name] --tables [tablename] > /to/path/tablename.sql;
For remote machine, use below one
/usr/local/mysql/bin/mysqldump -h [remoteip] --port = 3306 -u [username] -p [password] --databases [db_name] --tables [tablename] > /to/path/tablename.sql;
if (in_array('kitchen', $rooms) ...
These are includes for using shared memory
#include<sys/ipc.h>
#include<sys/shm.h>
int shmid;
int shmkey = 12222;//u can choose it as your choice
int main()
{
//now your main starting
shmid = shmget(shmkey,1024,IPC_CREAT);
// 1024 = your preferred size for share memory
// IPC_CREAT its a flag to create shared memory
//now attach a memory to this share memory
char *shmpointer = shmat(shmid,NULL);
//do your work with the shared memory
//read -write will be done with the *shmppointer
//after your work is done deattach the pointer
shmdt(&shmpointer, NULL);
You have to roll your own. E.g.,
/* from :http://www.builderau.com.au/architect/database/soa/Create-functions-to-join-and-split-strings-in-Oracle/0,339024547,339129882,00.htm
select split('foo,bar,zoo') from dual;
select * from table(split('foo,bar,zoo'));
pipelined function is SQL only (no PL/SQL !)
*/
create or replace type split_tbl as table of varchar2(32767);
/
show errors
create or replace function split
(
p_list varchar2,
p_del varchar2 := ','
) return split_tbl pipelined
is
l_idx pls_integer;
l_list varchar2(32767) := p_list;
l_value varchar2(32767);
begin
loop
l_idx := instr(l_list,p_del);
if l_idx > 0 then
pipe row(substr(l_list,1,l_idx-1));
l_list := substr(l_list,l_idx+length(p_del));
else
pipe row(l_list);
exit;
end if;
end loop;
return;
end split;
/
show errors;
/* An own implementation. */
create or replace function split2(
list in varchar2,
delimiter in varchar2 default ','
) return split_tbl as
splitted split_tbl := split_tbl();
i pls_integer := 0;
list_ varchar2(32767) := list;
begin
loop
i := instr(list_, delimiter);
if i > 0 then
splitted.extend(1);
splitted(splitted.last) := substr(list_, 1, i - 1);
list_ := substr(list_, i + length(delimiter));
else
splitted.extend(1);
splitted(splitted.last) := list_;
return splitted;
end if;
end loop;
end;
/
show errors
declare
got split_tbl;
procedure print(tbl in split_tbl) as
begin
for i in tbl.first .. tbl.last loop
dbms_output.put_line(i || ' = ' || tbl(i));
end loop;
end;
begin
got := split2('foo,bar,zoo');
print(got);
print(split2('1 2 3 4 5', ' '));
end;
/
As cephus mentioned android:drawablePadding
will only force padding between the text and the drawable if the button is small enough.
When laying out larger buttons you can use android:drawablePadding
in conjunction with android:paddingLeft
and android:paddingRight
to force the text and drawable inward towards the center of the button. By adjusting the left and right padding separately you can make very detailed adjustments to the layout.
Here's an example button that uses padding to push the text and icon closer together than they would be by default:
<Button android:text="@string/button_label"
android:id="@+id/buttonId"
android:layout_width="160dip"
android:layout_height="60dip"
android:layout_gravity="center"
android:textSize="13dip"
android:drawableLeft="@drawable/button_icon"
android:drawablePadding="2dip"
android:paddingLeft="30dip"
android:paddingRight="26dip"
android:singleLine="true"
android:gravity="center" />
You could use indexOf
function.
if(list.indexOf(createItem.artNr) !== -1) {
$scope.message = 'artNr already exists!';
}
More about indexOf:
if(data){}
it's mean !data
You can get this error with you have commented out HTML in a Flask application. Here the value for qual.date_expiry is None:
<!-- <td>{{ qual.date_expiry.date() }}</td> -->
Delete the line or fix it up:
<td>{% if qual.date_attained != None %} {{ qual.date_attained.date() }} {% endif %} </td>
This should work for SQL Server:
SELECT * FROM myTable
WHERE month = DATEPART(m, GETDATE()) AND
year = DATEPART(yyyy, GETDATE())
Ideally you should do both.
First Hash the pass password for the one way security. Use a salt for extra security.
Then encrypt the hash to defend against dictionary attacks if your database of password hashes is compromised.
In your phone go to Settings->Connect
to PC.
There you will see the option Default Connection Type
. Select it and set it to your preference.
I have search for this problem and i got the following answers:
"C:\Program Files\Apache-tomcat-7.0.69\"
remove the extra backslash (\
)Your problem will be solved
You could always create an intermediate class/interface that would satisfy the generic type that you are wanting to specify. For example, if Foo was an interface, you could create the following interface in your test class.
private interface FooBar extends Foo<Bar>
{
}
In situations where Foo is a non-final class, you could just extend the class with the following code and do the same thing:
public class FooBar extends Foo<Bar>
{
}
Then you could consume either of the above examples with the following code:
Foo<Bar> mockFoo = mock(FooBar.class);
when(mockFoo.getValue()).thenReturn(new Bar());
It's easier to kill a session, when some meaningful name is given:
//Creation:
screen -S some_name proc
// Kill detached session
screen -S some_name -X quit
<h1 style="text-align: left; float: left;">Text 1</h1>
<h2 style="text-align: right; float: right; display: inline;">Text 2</h2>
<hr style="clear: both;" />
Hope this helps!
Put a z-indez
of -1
on your absolute (or relative) positioned element.
This will pull it out of the stacking context. (I think.) Read more wonderful things about "stacking contexts" here: https://philipwalton.com/articles/what-no-one-told-you-about-z-index/
Here is my solution if you don't want to mess with additional libraries or edit your code manually. I created this Jupyter notebook to go over all java files and comment out all the Log messages. Not perfect but it got the job done for me.
std
namespace (where features of the C++ Standard Library, such as string
or vector
, are declared).After you write this instruction, if the compiler sees string
it will know that you may be referring to std::string
, and if it sees vector
, it will know that you may be referring to std::vector
. (Provided that you have included in your compilation unit the header files where they are defined, of course.)
If you don't write it, when the compiler sees string
or vector
it will not know what you are refering to. You will need to explicitly tell it std::string
or std::vector
, and if you don't, you will get a compile error.
Here is a function that would save/update keys of a JSON array in a column and another function that retrieves JSON values. This functions are created assuming that the column name of storing the JSON array is json. It is using PDO.
function save($uid, $key, $val){
global $dbh; // The PDO object
$sql = $dbh->prepare("SELECT `json` FROM users WHERE `id`=?");
$sql->execute(array($uid));
$data = $sql->fetch();
$arr = json_decode($data['json'],true);
$arr[$key] = $val; // Update the value
$sql=$dbh->prepare("UPDATE `users` SET `json`=? WHERE `id`=?");
$sql->execute(array(
json_encode($arr),
$uid
));
}
where $uid is the user's id, $key - the JSON key to update and it's value is mentioned as $val.
function get($uid, $key){
global $dbh;
$sql = $dbh->prepare("SELECT `json` FROM `users` WHERE `id`=?");
$sql->execute(array($uid));
$data = $sql->fetch();
$arr = json_decode($data['json'], true);
return $arr[$key];
}
where $key is a key of JSON array from which we need the value.
I've been told they are the same.
Actually they are documented in the same place under ruby-doc.org:
http://www.ruby-doc.org/core/classes/Array.html#M000249
- ary.collect {|item| block } ? new_ary
- ary.map {|item| block } ? new_ary
- ary.collect ? an_enumerator
- ary.map ? an_enumerator
Invokes block once for each element of self. Creates a new array containing the values returned by the block. See also Enumerable#collect.
If no block is given, an enumerator is returned instead.a = [ "a", "b", "c", "d" ] a.collect {|x| x + "!" } #=> ["a!", "b!", "c!", "d!"] a #=> ["a", "b", "c", "d"]
I use it to easily enable/disable variable commands:
#!/bin/bash
if [[ "$VERBOSE" == "" || "$VERBOSE" == "0" ]]; then
vecho=":" # no "verbose echo"
else
vecho=echo # enable "verbose echo"
fi
$vecho "Verbose echo is ON"
Thus
$ ./vecho
$ VERBOSE=1 ./vecho
Verbose echo is ON
This makes for a clean script. This cannot be done with '#'.
Also,
: >afile
is one of the simplest ways to guarantee that 'afile' exists but is 0 length.
PROBLEM SOLVED !!!!!!!
Turns out the storage
function DID NOT run even once.
because i had to include app.use(upload)
as upload = multer({storage}).single('file');
let storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, './storage')
},
filename: function (req, file, cb) {
console.log(file) // this didn't print anything out so i assumed it was never excuted
cb(null, file.fieldname + '-' + Date.now())
}
});
const upload = multer({storage}).single('file');
Try the article background-size. If you use all of the following, it will work in most browsers except Internet Explorer.
.foo {
background-image: url(bg-image.png);
-moz-background-size: 100% 100%;
-o-background-size: 100% 100%;
-webkit-background-size: 100% 100%;
background-size: 100% 100%;
}
This program is the bug free and enhanced version of the above MD5 cracker that reads the file containing list of hashed passwords and checks it against hashed word from the English dictionary word list. Hope it is helpful.
I downloaded the English dictionary from the following link https://github.com/dwyl/english-words
# md5cracker.py
# English Dictionary https://github.com/dwyl/english-words
import hashlib, sys
hash_file = 'exercise\hashed.txt'
wordlist = 'data_sets\english_dictionary\words.txt'
try:
hashdocument = open(hash_file,'r')
except IOError:
print('Invalid file.')
sys.exit()
else:
count = 0
for hash in hashdocument:
hash = hash.rstrip('\n')
print(hash)
i = 0
with open(wordlist,'r') as wordlistfile:
for word in wordlistfile:
m = hashlib.md5()
word = word.rstrip('\n')
m.update(word.encode('utf-8'))
word_hash = m.hexdigest()
if word_hash==hash:
print('The word, hash combination is ' + word + ',' + hash)
count += 1
break
i += 1
print('Itiration is ' + str(i))
if count == 0:
print('The hash given does not correspond to any supplied word in the wordlist.')
else:
print('Total passwords identified is: ' + str(count))
sys.exit()
The simplest way to read each line of a file into a bash
array is this:
IFS=$'\n' read -d '' -r -a lines < /etc/passwd
Now just index in to the array lines
to retrieve each line, e.g.
printf "line 1: %s\n" "${lines[0]}"
printf "line 5: %s\n" "${lines[4]}"
# all lines
echo "${lines[@]}"
You need to use a group by clause.
SELECT site_id, MAX(ts) as TIME, count(*) group by site_id
You can use the :checkbox
and :checked
pseudo-selectors and the .class
selector, with that you will make sure that you are getting the right elements, only checked checkboxes with the class you specify.
Then you can easily use the Traversing/map method to get an array of values:
var values = $('input:checkbox:checked.group1').map(function () {
return this.value;
}).get(); // ["18", "55", "10"]
I had a similar problem and found that if you remove the size definition, it works for some reason.
Remove:
<size
android:width="60dp"
android:height="40dp" />
from the shape.
Let me know if this works!
For Java users
write this line above your setContentView(R.layout.activity_main);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
For kotlin users
window.setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE)
You should define the struct out of the class like this:
#include <iostream>
using namespace std;
struct X
{
int v;
};
class E
{
public:
X var;
};
int main(){
E object;
object.var.v=10;
return 0;
}
The problem exists in old versions on the iOS. in the latest, the right-to-left works well. What I did, is as follows:
first I check the iOS version:
if (![self compareCurVersionTo:4 minor:3 point:0])
Than:
// set RTL on the start on each line (except the first)
myUITextView.text = [myUITextView.text stringByReplacingOccurrencesOfString:@"\n"
withString:@"\u202B\n"];
Typically you model the enum itself as a class with the enum
stereotype
If you want to make multiple operation use
select (sel1.s1+sel2+s2)
(select sum(hours) s1 from resource) sel1
join
(select sum(hours) s2 from projects-time)sel2
on sel1.s1=sel2.s2
The error shows you either didn't create the rails project yet or you're not in the rails project directory.
Suppose if you're working on myapp project. You've to move to that project directory on your command line and then generate the model. Here are some steps you can refer.
Example: Assuming you didn't create the Rails app yet:
$> rails new myapp
$> cd myapp
Now generate the model from your commandline.
$> rails generate model your_model_name
Alternatively, consider using a document databases (such as MongoDB) which natively support rich data structures and nesting.
run in root access ssh chould solve this problem
or chmod 0777 /dir/to/be/backedup/
or chown username:user /dir/to/be/backedup/
Typically a .sh file is a shell script which you can execute in a terminal. Specifically, the script you mentioned is a bash script, which you can see if you open the file and look in the first line of the file, which is called the shebang or magic line.
The easiest option is to make use of the Excel copy/paste.
Public Sub insertRowBelow()
ActiveCell.Offset(1).EntireRow.Insert Shift:=xlDown, CopyOrigin:=xlFormatFromRightOrAbove
ActiveCell.EntireRow.Copy
ActiveCell.Offset(1).EntireRow.PasteSpecial xlPasteFormats
Application.CutCopyMode = False
End Sub
Just import tensortflow and use keras, it's that easy.
import tensorflow as tf
# your code here
with tf.device('/gpu:0'):
model.fit(X, y, epochs=20, batch_size=128, callbacks=callbacks_list)
As of Oct 2019, SQL Server Management Studio, they did not upgraded the SSMS to add create ER Diagram feature.
I would suggest try using DBWeaver from here :
I am using Mac and Windows both and I was able to download the community edition and logged into my SQL server database and was able to create the ER diagram using the DB Weaver.
You can do by using a custom middleware, even though knowing that the best option is using the tested approach of the package django-cors-headers
. With that said, here is the solution:
create the following structure and files:
-- myapp/middleware/__init__.py
from corsMiddleware import corsMiddleware
-- myapp/middleware/corsMiddleware.py
class corsMiddleware(object):
def process_response(self, req, resp):
resp["Access-Control-Allow-Origin"] = "*"
return resp
add to settings.py
the marked line:
MIDDLEWARE_CLASSES = (
"django.contrib.sessions.middleware.SessionMiddleware",
"django.middleware.common.CommonMiddleware",
"django.middleware.csrf.CsrfViewMiddleware",
# Now we add here our custom middleware
'app_name.middleware.corsMiddleware' <---- this line
)
document.getElementById("placehere").appendChild(elem);
not
document.getElementById("placehere").appendChild("elem");
and use the below to set the source
elem.src = 'images/hydrangeas.jpg';
Personally, I do not accept a whitespace ($STR3) as being 'not empty'.
When a variable that only contains whitespaces is passed onto a parameter, it will often error that the parameters value may not be '$null', instead of saying it may not be a whitespace, some remove commands might remove a root folder instead of a subfolder if the subfolder name is a "white space", all the reason not to accept a string containing whitespaces in many cases.
I find this is the best way to accomplish it:
$STR1 = $null
IF ([string]::IsNullOrWhitespace($STR1)){'empty'} else {'not empty'}
Empty
$STR2 = ""
IF ([string]::IsNullOrWhitespace($STR2)){'empty'} else {'not empty'}
Empty
$STR3 = " "
IF ([string]::IsNullOrWhitespace($STR3)){'empty !! :-)'} else {'not Empty :-('}
Empty!! :-)
$STR4 = "Nico"
IF ([string]::IsNullOrWhitespace($STR4)){'empty'} else {'not empty'}
Not empty
Sometimes a server will choose not to respond based on what it sees or doesn't see in the http request headers (such as an appropriate user agent). If you can connect with a browser, grab the headers it sends and mimic them in your stream context.
From the mpdf site: "mPDF is a PHP class which generates PDF files from UTF-8 encoded HTML. It is based on FPDF and HTML2FPDF, with a number of enhancements."
mpdf is superior to FPDF for language handling and UTF-8 support. For CJK support it not only supports font embedding, but font subsetting (so your CJK PDFs are not oversized). TCPDF and FPDF have nothing on the UTF-8 and Font support of mpdf. It even comes with some open source fonts as of version 5.0.
You want:
foreach (int number in numbers) // <--- go back to here --------+
{ // |
if (number < 0) // |
{ // |
continue; // Skip the remainder of this iteration. -----+
}
// do work
}
Here's more about the continue
keyword.
Update: In response to Brian's follow-up question in the comments:
Could you further clarify what I would do if I had nested for loops, and wanted to skip the iteration of one of the extended ones?
for (int[] numbers in numberarrays) { for (int number in numbers) { // What to do if I want to // jump the (numbers/numberarrays)? } }
A continue
always applies to the nearest enclosing scope, so you couldn't use it to break out of the outermost loop. If a condition like that arises, you'd need to do something more complicated depending on exactly what you want, like break
from the inner loop, then continue
on the outer loop. See here for the documentation on the break
keyword. The break
C# keyword is similar to the Perl last
keyword.
Also, consider taking Dustin's suggestion to just filter out values you don't want to process beforehand:
foreach (var basket in baskets.Where(b => b.IsOpen())) {
foreach (var fruit in basket.Where(f => f.IsTasty())) {
cuteAnimal.Eat(fruit); // Om nom nom. You don't need to break/continue
// since all the fruits that reach this point are
// in available baskets and tasty.
}
}
As everyone else has pointed out, this can work:
<a href="newsletter_01.pdf" target="_blank">Read more</a>
But what nobody has pointed out is that it's not guaranteed to work.
There is no way to force a user's browser to open a PDF file in a new tab. Depending on the user's browser settings, even with target="_blank"
the browser may react the following ways:
Take a look at Firefox's settings, for example:
Chrome has a similar setting:
If the user has chosen to "Save File" in their browsers settings when encountering a PDF, there is no way you can override it.
There are many plugins for doing that. I normally use datatables it works great. http://datatables.net/
svn propset "svn:ignore" "*.xml" .
the *.xml
is the pattern of files to ignore;
you can use directory names here as well.
You need to read something about a JSP's lifecycle. Try this: http://en.wikipedia.org/wiki/File:JSPLife.png
JavaScript runs on the client, but in order to change the jsp, you need access to the server. This can be done through Ajax(http://en.wikipedia.org/wiki/Ajax_%28programming%29).
Here are some Ajax-related links: http://www.openjs.com/articles/ajax_xmlhttp_using_post.php
http://www.w3schools.com/ajax/tryit.asp?filename=tryajax_first
You must pip install pyserial
first.
It sounds like more of an architectual issue, and any timeout/disconnect you can do would be more or less a band-aid. This has to be solved on SQL server side, by the way of read-only replica, transaction log shipping (to give you a read-only server to connect to), replication and such. Basically you give the DMZ sql server that heavy read can go to without killing stuff. This is very common. A well-designed SQL system won't be taken down by DDoS - that'd be like a car that dies if you step on the gas.
That said, if you are at the liberty to change the code, you could guesstimate if the query is too heavy and you could either reject or return only X rows in your stored procedure. If you are mated to some reporting tool and such and can't control the SELECT it generates, you could point it to a view and then do the safety valve in the view.
Also, if up-to-the-minute freshness isn't critical and you could compromise on that, like monthly sales data, then compiling a physical table of complex joins by job to avoid complex joins might do the trick - that way everything would be sub-second per query.
It entirely depends on what you are doing, but there is always a solution. Sometimes it takes extra coding to optimize it, sometimes it takes extra money to get you the secondary read-only DB, sometimes it needs time and attention in index tuning.
So it entirely depends, but I'd start with "what can I compromise? what can I change?" and go from there.
There is of course some apache log files. Search in your apache configuration files for 'Log' keyword, you'll certainly find plenty of them. Depending on your OS and installation places may vary (in a Typical Linux server it would be /var/log/apache2/[access|error].log).
Having a 503 error in Apache usually means the proxied page/service is not available. I assume you're using tomcat and that means tomcat is either not responding to apache (timeout?) or not even available (down? crashed?). So chances are that it's a configuration error in the way to connect apache and tomcat or an application inside tomcat that is not even sending a response for apache.
Sometimes, in production servers, it can as well be that you get too much traffic for the tomcat server, apache handle more request than the proxyied service (tomcat) can accept so the backend became unavailable.
In getview method put listener outside checking the view..try to follow this..it worked in my case..How to Increase or decrease value of edittext in listview's each row?
onUserLeaveHint();
override this activity class method.This will detect the home key click . This method is called right before the activity's onPause() callback.But it will not be called when an activity is interrupted like a in-call activity comes into foreground, apart from that interruptions it will call when user click home key.
@Override
protected void onUserLeaveHint() {
super.onUserLeaveHint();
Log.d(TAG, "home key clicked");
}
Cool @derek-kromm, Your answer is accepted and correct, But I am wondering if we need to alter
more than the column. Here is how we can do.
ALTER TABLE tbl_name
ALTER COLUMN col_name TYPE varchar (11),
ALTER COLUMN col_name2 TYPE varchar (11),
ALTER COLUMN col_name3 TYPE varchar (11);
Cheers!! Read Simple Write Simple
Oracle SQL:
There is the "IN" Operator in Oracle SQL which can be used for that:
select
namet.customerfirstname, addrt.city, addrt.postalcode
from schemax.nametable namet
join schemax.addresstable addrt on addrt.adtid = namet.natadtid
where namet.customerfirstname in ('David', 'Moses', 'Robi');
In case you need to check against any amount of whitespace, not just single space, you can do this:
To strip string of extra white space (also condences whitespace in the middle to one space):
trimmed=`echo -- $original`
The --
ensures that if $original
contains switches understood by echo, they'll still be considered as normal arguments to be echoed. Also it's important to not put ""
around $original
, or the spaces will not get removed.
After that you can just check if $trimmed
is empty.
[ -z "$trimmed" ] && echo "empty!"
I know this question is old but I spend an hour trying to export a complex query to csv and I wanted to share my thoughts. First I couldn't get any of the json to csv converters to work (although this one looked promising). What I ended up doing was manually writing the csv file in my mongo script.
This is a simple version but essentially what I did:
print("name,id,email");
db.User.find().forEach(function(user){
print(user.name+","+user._id.valueOf()+","+user.email);
});
This I just piped the query to stdout
mongo test export.js > out.csv
where test
is the name of the database I use.
What I need is to use Docker with MariaDb on different port /3301/ on my Ubuntu machine because I already had MySql installed and running on 3306.
To do this after half day searching did it using:
docker run -it -d -p 3301:3306 -v ~/mdbdata/mariaDb:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=root --name mariaDb mariadb
This pulls the image with latest MariaDb, creates container called mariaDb, and run mysql on port 3301. All data of which is located in home directory in /mdbdata/mariaDb.
To login in mysql after that can use:
mysql -u root -proot -h 127.0.0.1 -P3301
Used sources are:
The answer of Iarks in this article /using -it -d was the key :) /
how-to-install-and-use-docker-on-ubuntu-16-04
installing-and-using-mariadb-via-docker
mariadb-and-docker-use-cases-part-1
Good luck all!
if ( typeof query !== 'undefined' && query )
{
//do stuff if query is defined and not null
}
else
{
}
Here is full java example:-
public class QuoteInJava {
public static void main (String args[])
{
System.out.println ("If you need to 'quote' in Java");
System.out.println ("you can use single \' or double \" quote");
}
}
Here is Out PUT:-
If you need to 'quote' in Java
you can use single ' or double " quote
To fade between 2 colors using only simple javascript:
function Blend(a, b, alpha) {
var aa = [
parseInt('0x' + a.substring(1, 3)),
parseInt('0x' + a.substring(3, 5)),
parseInt('0x' + a.substring(5, 7))
];
var bb = [
parseInt('0x' + b.substring(1, 3)),
parseInt('0x' + b.substring(3, 5)),
parseInt('0x' + b.substring(5, 7))
];
r = '0' + Math.round(aa[0] + (bb[0] - aa[0])*alpha).toString(16);
g = '0' + Math.round(aa[1] + (bb[1] - aa[1])*alpha).toString(16);
b = '0' + Math.round(aa[2] + (bb[2] - aa[2])*alpha).toString(16);
return '#'
+ r.substring(r.length - 2)
+ g.substring(g.length - 2)
+ b.substring(b.length - 2);
}
function fadeText(cl1, cl2, elm){
var t = [];
var steps = 100;
var delay = 3000;
for (var i = 0; i < steps; i++) {
(function(j) {
t[j] = setTimeout(function() {
var a = j/steps;
var color = Blend(cl1,cl2,a);
elm.style.color = color;
}, j*delay/steps);
})(i);
}
return t;
}
var cl1 = "#ffffff";
var cl2 = "#c00000";
var elm = document.getElementById("note");
T = fadeText(cl1,cl2,elm);
You actually can't manually "free" memory in C, in the sense that the memory is released from the process back to the OS ... when you call malloc()
, the underlying libc-runtime will request from the OS a memory region. On Linux, this may be done though a relatively "heavy" call like mmap()
. Once this memory region is mapped to your program, there is a linked-list setup called the "free store" that manages this allocated memory region. When you call malloc()
, it quickly looks though the free-store for a free block of memory at the size requested. It then adjusts the linked list to reflect that there has been a chunk of memory taken out of the originally allocated memory pool. When you call free()
the memory block is placed back in the free-store as a linked-list node that indicates its an available chunk of memory.
If you request more memory than what is located in the free-store, the libc-runtime will again request more memory from the OS up to the limit of the OS's ability to allocate memory for running processes. When you free memory though, it's not returned back to the OS ... it's typically recycled back into the free-store where it can be used again by another call to malloc()
. Thus, if you make a lot of calls to malloc()
and free()
with varying memory size requests, it could, in theory, cause a condition called "memory fragmentation", where there is enough space in the free-store to allocate your requested memory block, but not enough contiguous space for the size of the block you've requested. Thus the call to malloc()
fails, and you're effectively "out-of-memory" even though there may be plenty of memory available as a total amount of bytes in the free-store.
Using LINQ
objListOrder = GetOrderList()
.OrderBy(o => o.OrderDate)
.ToList();
objListOrder = GetOrderList()
.OrderBy(o => o.OrderId)
.ToList();
Please go through the link given below msdn.microsoft.com/en-us/library/ms836794.aspx It covers both the similarity and difference between C# and java
check out
http://www.thesitewizard.com/general/set-cron-job.shtml
for the specifics of setting your crontab directives.
45 10 * * *
will run in the 10th hour, 45th minute of every day.
for midnight... maybe
0 0 * * *
file
PS /home/edward/Desktop>
Get-Content ./copy.txt
[Desktop Entry]
Name=calibre Exec=~/Apps/calibre/calibre
Icon=~/Apps/calibre/resources/content-server/calibre.png
Type=Application*
Start by get the content from file and trim the white spaces if any found in each line of the text document. That becomes the object passed to the where-object to go through the array looking at each member of the array with string length greater then 0. That object is passed to replace the content of the file you started with. It would probably be better to make a new file... Last thing to do is reads back the newly made file's content and see your awesomeness.
(Get-Content ./copy.txt).Trim() | Where-Object{$_.length -gt 0} | Set-Content ./copy.txt
Get-Content ./copy.txt
Please try as below to get the time difference in hh:mm:ss format
Select StartTime, EndTime, CAST((EndTime - StartTime) as time(0)) 'TotalTime' from [TableName]
try this :
driver = webdriver.Chrome(ChromeDriverManager().install())
Empty slice and nil slice are initialized differently in Go:
var nilSlice []int
emptySlice1 := make([]int, 0)
emptySlice2 := []int{}
fmt.Println(nilSlice == nil) // true
fmt.Println(emptySlice1 == nil) // false
fmt.Println(emptySlice2 == nil) // false
As for all three slices, len and cap are 0.
1NF is the most basic of normal forms - each cell in a table must contain only one piece of information, and there can be no duplicate rows.
2NF and 3NF are all about being dependent on the primary key. Recall that a primary key can be made up of multiple columns. As Chris said in his response:
The data depends on the key [1NF], the whole key [2NF] and nothing but the key [3NF] (so help me Codd).
Say you have a table containing courses that are taken in a certain semester, and you have the following data:
|-----Primary Key----| uh oh |
V
CourseID | SemesterID | #Places | Course Name |
------------------------------------------------|
IT101 | 2009-1 | 100 | Programming |
IT101 | 2009-2 | 100 | Programming |
IT102 | 2009-1 | 200 | Databases |
IT102 | 2010-1 | 150 | Databases |
IT103 | 2009-2 | 120 | Web Design |
This is not in 2NF, because the fourth column does not rely upon the entire key - but only a part of it. The course name is dependent on the Course's ID, but has nothing to do with which semester it's taken in. Thus, as you can see, we have duplicate information - several rows telling us that IT101 is programming, and IT102 is Databases. So we fix that by moving the course name into another table, where CourseID is the ENTIRE key.
Primary Key |
CourseID | Course Name |
---------------------------|
IT101 | Programming |
IT102 | Databases |
IT103 | Web Design |
No redundancy!
Okay, so let's say we also add the name of the teacher of the course, and some details about them, into the RDBMS:
|-----Primary Key----| uh oh |
V
Course | Semester | #Places | TeacherID | TeacherName |
---------------------------------------------------------------|
IT101 | 2009-1 | 100 | 332 | Mr Jones |
IT101 | 2009-2 | 100 | 332 | Mr Jones |
IT102 | 2009-1 | 200 | 495 | Mr Bentley |
IT102 | 2010-1 | 150 | 332 | Mr Jones |
IT103 | 2009-2 | 120 | 242 | Mrs Smith |
Now hopefully it should be obvious that TeacherName is dependent on TeacherID - so this is not in 3NF. To fix this, we do much the same as we did in 2NF - take the TeacherName field out of this table, and put it in its own, which has TeacherID as the key.
Primary Key |
TeacherID | TeacherName |
---------------------------|
332 | Mr Jones |
495 | Mr Bentley |
242 | Mrs Smith |
No redundancy!!
One important thing to remember is that if something is not in 1NF, it is not in 2NF or 3NF either. So each additional Normal Form requires everything that the lower normal forms had, plus some extra conditions, which must all be fulfilled.
You can also use EXIT_SUCCESS
instead of return 0;
. The macro EXIT_SUCCESS
is actually defined as zero, but makes your program more readable.
JPG and JPEG stand both for an image format proposed and supported by the Joint Photographic Experts Group. The two terms have the same meaning and are interchangeable.
To read on, check out Difference between JPG and JPEG.
The reason for the different file extensions dates back to the early versions of Windows. The original file extension for the Joint Photographic Expert Group File Format was ‘.jpeg’; however in Windows all files required a three letter file extension. So, the file extension was shortened to ‘.jpg’. However, Macintosh was not limited to three letter file extensions, so Mac users used ‘.jpeg’. Eventually, with upgrades Windows also began to accept ‘.jpeg’. However, many users were already used to ‘.jpg’, so both the three letter file extension and the four letter extension began to be commonly used, and still is.
Today, the most commonly accepted and used form is the ‘.jpg’, as many users were Windows users. Imaging applications, such as Adobe Photoshop, save all JPEG files with a ".jpg" extension on both Mac and Windows, in an attempt to avoid confusion. The Joint Photographic Expert Group File Format can also be saved with the upper-case ‘.JPEG’ and ‘.JPG’ file extensions, which are less common, but also accepted.
Yes it is correct. you can do it with an inner class.
There are many options to consume a SOAP web service with Stub or Java classes created based on WSDL. But if anyone wants to do this without any Java class created, this article is very helpful. Code Snippet from the article:
public String someMethod() throws MalformedURLException, IOException {
//Code to make a webservice HTTP request
String responseString = "";
String outputString = "";
String wsURL = "<Endpoint of the webservice to be consumed>";
URL url = new URL(wsURL);
URLConnection connection = url.openConnection();
HttpURLConnection httpConn = (HttpURLConnection)connection;
ByteArrayOutputStream bout = new ByteArrayOutputStream();
String xmlInput = "entire SOAP Request";
byte[] buffer = new byte[xmlInput.length()];
buffer = xmlInput.getBytes();
bout.write(buffer);
byte[] b = bout.toByteArray();
String SOAPAction = "<SOAP action of the webservice to be consumed>";
// Set the appropriate HTTP parameters.
httpConn.setRequestProperty("Content-Length",
String.valueOf(b.length));
httpConn.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
httpConn.setRequestProperty("SOAPAction", SOAPAction);
httpConn.setRequestMethod("POST");
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
OutputStream out = httpConn.getOutputStream();
//Write the content of the request to the outputstream of the HTTP Connection.
out.write(b);
out.close();
//Ready with sending the request.
//Read the response.
InputStreamReader isr = null;
if (httpConn.getResponseCode() == 200) {
isr = new InputStreamReader(httpConn.getInputStream());
} else {
isr = new InputStreamReader(httpConn.getErrorStream());
}
BufferedReader in = new BufferedReader(isr);
//Write the SOAP message response to a String.
while ((responseString = in.readLine()) != null) {
outputString = outputString + responseString;
}
//Parse the String output to a org.w3c.dom.Document and be able to reach every node with the org.w3c.dom API.
Document document = parseXmlFile(outputString); // Write a separate method to parse the xml input.
NodeList nodeLst = document.getElementsByTagName("<TagName of the element to be retrieved>");
String elementValue = nodeLst.item(0).getTextContent();
System.out.println(elementValue);
//Write the SOAP message formatted to the console.
String formattedSOAPResponse = formatXML(outputString); // Write a separate method to format the XML input.
System.out.println(formattedSOAPResponse);
return elementValue;
}
For those who're looking for a similar kind of solution with file upload while consuming a SOAP API, please refer to this post: How to attach a file (pdf, jpg, etc) in a SOAP POST request?
I've tried this in Python 3.6.9
Convert Binary to Decimal
>>> 0b101111
47
>>> int('101111',2)
47
Convert Decimal to binary
>>> bin(47)
'0b101111'
Place a 0 as the second parameter python assumes it as decimal.
>>> int('101111',0)
101111
Google page have a link that you can download the source code and the full tree.
Go to the Source tab, then click on Browse
then you see the link for Download it as:
The Most Reliable way to replay har file is using a free tool like Fiddler, the tool is always free and can be downloaded quickly. The sites for the opening har file are all buggy and cannot open large files. Fiddler is available for all platforms.
https://www.telerik.com/download/fiddler
Go to File Menu -> Import Sessions...
Select the "HTTPArchive" Option
Browse to your HAR file
The HAR file will open and replay on the fiddler window.
The command you want is named tee
:
foo | tee output.file
For example, if you only care about stdout:
ls -a | tee output.file
If you want to include stderr, do:
program [arguments...] 2>&1 | tee outfile
2>&1
redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout. It is also directed to the given output file as of the tee
command.
Furthermore, if you want to append to the log file, use tee -a
as:
program [arguments...] 2>&1 | tee -a outfile
My suggestion would be
$value = $_POST["myfield"];
$Query = Database::Prepare("SELECT * FROM TABLE WHERE MYFIELD LIKE ?");
$Query->Execute(array("%".$value."%"));
The actual walk through the directories works as you have coded it. If you replace the contents of the inner loop with a simple print
statement you can see that each file is found:
import os
rootdir = 'C:/Users/sid/Desktop/test'
for subdir, dirs, files in os.walk(rootdir):
for file in files:
print os.path.join(subdir, file)
If you still get errors when running the above, please provide the error message.
Updated for Python3
import os
rootdir = 'C:/Users/sid/Desktop/test'
for subdir, dirs, files in os.walk(rootdir):
for file in files:
print(os.path.join(subdir, file))
Use something like this:
class Tree < T > : Dictionary < T, IList< Tree < T > > >
{
}
It's ugly, but I think it will give you what you want. Too bad KeyValuePair is sealed.
This is more a workaround than a real solution. You can create a new object test_data
with another column name:
left_join("names<-"(test_data, "name"), kantrowitz, by = "name")
name gender
1 john M
2 bill either
3 madison M
4 abby either
5 zzz <NA>
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
. . . . . . .
System.out.println("Value" + connection.getResponseCode());
System.out.println(connection.getResponseMessage());
System.out.println("content"+connection.getContent());
You need to handle two scenarios:
If you just need a base class you can use, here's a Swift 3 version:
import UIKit
final class SwipeNavigationController: UINavigationController {
// MARK: - Lifecycle
override init(rootViewController: UIViewController) {
super.init(rootViewController: rootViewController)
delegate = self
}
override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
delegate = self
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
delegate = self
}
override func viewDidLoad() {
super.viewDidLoad()
// This needs to be in here, not in init
interactivePopGestureRecognizer?.delegate = self
}
deinit {
delegate = nil
interactivePopGestureRecognizer?.delegate = nil
}
// MARK: - Overrides
override func pushViewController(_ viewController: UIViewController, animated: Bool) {
duringPushAnimation = true
super.pushViewController(viewController, animated: animated)
}
// MARK: - Private Properties
fileprivate var duringPushAnimation = false
}
// MARK: - UINavigationControllerDelegate
extension SwipeNavigationController: UINavigationControllerDelegate {
func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
guard let swipeNavigationController = navigationController as? SwipeNavigationController else { return }
swipeNavigationController.duringPushAnimation = false
}
}
// MARK: - UIGestureRecognizerDelegate
extension SwipeNavigationController: UIGestureRecognizerDelegate {
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
guard gestureRecognizer == interactivePopGestureRecognizer else {
return true // default value
}
// Disable pop gesture in two situations:
// 1) when the pop animation is in progress
// 2) when user swipes quickly a couple of times and animations don't have time to be performed
return viewControllers.count > 1 && duringPushAnimation == false
}
}
If you end up needing to act as a UINavigationControllerDelegate
in another class, you can write a delegate forwarder similar to this answer.
Adapted from source in Objective-C: https://github.com/fastred/AHKNavigationController
This is actually super simple with just a little bit of added javascript. The link's href is used as the ajax content source. Note that for Bootstrap 3.* we set data-remote="false"
to disable the deprecated Bootstrap load function.
JavaScript:
// Fill modal with content from link href
$("#myModal").on("show.bs.modal", function(e) {
var link = $(e.relatedTarget);
$(this).find(".modal-body").load(link.attr("href"));
});
Html (based on the official example):
<!-- Link trigger modal -->
<a href="remoteContent.html" data-remote="false" data-toggle="modal" data-target="#myModal" class="btn btn-default">
Launch Modal
</a>
<!-- Default bootstrap modal example -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
Try it yourself: https://jsfiddle.net/ednon5d1/
There was a bug in iOS 6, that causes line height to be ignored when font is set. See answer to NSParagraphStyle line spacing ignored and longer bug analysis at Radar: UITextView Ignores Minimum/Maximum Line Height in Attributed String.
The access to your Apache server is forbidden from addresses other than 127.0.0.1
in httpd.conf
(Apache's config file) :
<Directory "c:/wamp/www/">
Options Indexes FollowSymLinks
AllowOverride all
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
</Directory>
The same goes for your PHPMyAdmin access, the config file is phpmyadmin.conf
:
<Directory "c:/wamp/apps/phpmyadmin3.4.5/">
Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
</Directory>
You can set them to allow connections from all IP addresses like follows :
AllowOverride All
Order allow,deny
Allow from all
Here is a simple routine for an array of primitive elements:
for ($i = 0; $i < count($mySimpleArray); $i++)
{
echo $mySimpleArray[$i] . "\n";
}
Use group_concat() function of mysql.
SELECT GROUP_CONCAT(id) FROM table_level where parent_id=4 GROUP BY parent_id;
It'll give you concatenated string like :
5,6,9,10,12,14,15,17,18,779
Wrap the label and the input within a bootstraps div
<div class ="row">
<div class="col-md-4">Name:</div>
<div class="col-md-8"><input type="text"></div>
</div>
Seems like a permissions issue. This is what worked for me
sudo chown -R $(whoami) /Library/Ruby/Gems/*
or in your case
sudo chown -R $(whoami) /usr/local/lib/ruby/gems/2.0.0/gems/
What does this do:
This is telling the system to change the files to change the ownership to the current user. Something must have gotten messed up when something got installed. Usually this is because there are multiple accounts or users are using sudo to install when they should not always have to.
I hope this can help what you want.
private class MyPagerAdapter extends FragmentStatePagerAdapter {
//... your existing code
@Override
public int getItemPosition(Object object){
return PagerAdapter.POSITION_UNCHANGED;
}
}
You can run the cd
and the executable in a subshell by enclosing the command line in a pair of parentheses:
(cd SOME_PATH && exec_some_command)
Demo:
$ pwd
/home/abhijit
$ (cd /tmp && pwd) # directory changed in the subshell
/tmp
$ pwd # parent shell's pwd is still the same
/home/abhijit
I would also note there are two ways to get the number of ms in the time point. I'm not sure which one is better, I've benchmarked them and they both have the same performance, so I guess it's a matter of preference. Perhaps Howard could chime in:
auto now = system_clock::now();
//Cast the time point to ms, then get its duration, then get the duration's count.
auto ms = time_point_cast<milliseconds>(now).time_since_epoch().count();
//Get the time point's duration, then cast to ms, then get its count.
auto ms = duration_cast<milliseconds>(tpBid.time_since_epoch()).count();
The first one reads more clearly in my mind going from left to right.
You can try "ours" option in git merge,
git merge branch -X ours
This option forces conflicting hunks to be auto-resolved cleanly by favoring our version. Changes from the other tree that do not conflict with our side are reflected to the merge result. For a binary file, the entire contents are taken from our side.
I fixed this error by simply switching from Debug to Release, launch program (It worked on release), then switch back to Debug.
I tried just about everything else, including restarting Visual Studio and nothing worked.
len
is a built-in function that calls the given container object's __len__
member function to get the number of elements in the object.
Functions encased with double underscores are usually "special methods" implementing one of the standard interfaces in Python (container, number, etc). Special methods are used via syntactic sugar (object creation, container indexing and slicing, attribute access, built-in functions, etc.).
Using obj.__len__()
wouldn't be the correct way of using the special method, but I don't see why the others were modded down so much.
Use either
$ gem list --no-version | xargs gem uninstall -ax
or
$ sudo gem list --no-version | xargs sudo gem uninstall -ax
Depending on what you want, you may need to execute both, because "gem list" and "sudo gem list" provide independent lists.
Do not mix a normal "gem list" with a sudo-ed "gem uninstall" nor the other way around otherwise you may end up uninstalling sudo-installed gems (former) or getting a lot of errors (latter).
The stored procedure sp_columns returns detailed table information.
exec sp_columns MyTable