(This is my third answer because I misunderstood what your code was doing in my original, and then made a small but crucial mistake in my second—hopefully three's a charm.
Edits: Since this seems to be a popular answer, I've made a few modifications to improve its implementation over the years—most not too major. This is so if folks use it as template, it will provide an even better basis.
As others have pointed out, your MemoryError
problem is most likely because you're attempting to read the entire contents of huge files into memory and then, on top of that, effectively doubling the amount of memory needed by creating a list of lists of the string values from each line.
Python's memory limits are determined by how much physical ram and virtual memory disk space your computer and operating system have available. Even if you don't use it all up and your program "works", using it may be impractical because it takes too long.
Anyway, the most obvious way to avoid that is to process each file a single line at a time, which means you have to do the processing incrementally.
To accomplish this, a list of running totals for each of the fields is kept. When that is finished, the average value of each field can be calculated by dividing the corresponding total value by the count of total lines read. Once that is done, these averages can be printed out and some written to one of the output files. I've also made a conscious effort to use very descriptive variable names to try to make it understandable.
try:
from itertools import izip_longest
except ImportError: # Python 3
from itertools import zip_longest as izip_longest
GROUP_SIZE = 4
input_file_names = ["A1_B1_100000.txt", "A2_B2_100000.txt", "A1_B2_100000.txt",
"A2_B1_100000.txt"]
file_write = open("average_generations.txt", 'w')
mutation_average = open("mutation_average", 'w') # left in, but nothing written
for file_name in input_file_names:
with open(file_name, 'r') as input_file:
print('processing file: {}'.format(file_name))
totals = []
for count, fields in enumerate((line.split('\t') for line in input_file), 1):
totals = [sum(values) for values in
izip_longest(totals, map(float, fields), fillvalue=0)]
averages = [total/count for total in totals]
for print_counter, average in enumerate(averages):
print(' {:9.4f}'.format(average))
if print_counter % GROUP_SIZE == 0:
file_write.write(str(average)+'\n')
file_write.write('\n')
file_write.close()
mutation_average.close()
Try using entity codes such as 
for CR, 

for LF, and 	
for TAB.
For example:
<div title="1)	A
2)	B">Hover Me</div>
_x000D_
I don't think there's a concise, sensible way to do that, but there are verbose, sensible ways (such as Foo Bah's) and concise, pathological ways, such as
ifneq (,$(findstring $(GCC_MINOR),4-5))
CFLAGS += -fno-strict-overflow
endif
(which will execute the command provided that the string $(GCC_MINOR) appears inside the string 4-5).
There's certainly a performance difference when running a compiled script. If you run normal .py
scripts, the machine compiles it every time it is run and this takes time. On modern machines this is hardly noticeable but as the script grows it may become more of an issue.
Explicitly setting the GIT_DIR
environment variable forces git to use the given directory as the git repository. It is never needed during normal use.
In your example, because have specified a GIT_DIR
and it isn't named .git
(the leading dot is important) and you haven't provided a --work-tree
option or set the GIT_WORK_TREE
environment variable, that you want a bare repository when you said git init
.
Because a bare repository has no working tree a large selection of commands don't make sense with a bare repository. git add
is just one.
Is there a particular reason that you need to use a non-standard location for your git repository, rather than in a .git
subfolder under the working tree root? While it's possible to arrange this it tends to be more work and more liable to user mistakes.
Map.Entry interface helps us iterating a Map class
Check this simple example:
public class MapDemo {
public static void main(String[] args) {
Map<Integer,String> map=new HashMap();
map.put(1, "Kamran");
map.put(2, "Ali");
map.put(3, "From");
map.put(4, "Dir");
map.put(5, "Lower");
for(Map.Entry m:map.entrySet()){
System.out.println(m.getKey()+" "+m.getValue());
}
}
}
Simpler than ever, forget about ViewTypes. Is not recommended to use multiple viewtypes inside one adapter, it will mess the code and break the single responsibility principle since now the adapter needs to handle logic to know which view to inflate, now imagine working in large teams where each team has to work in one of those viewtypes features, it will be a mess to touch the same adapter by all the teams that work in the different viewtypes, this is solved using ConcatAdapter where you isolate the adapters, code them one by one and then just merge them inside one view.
From recyclerview:1.2.0-alpha04
you now can use ConcatAdapter
If you need a view with different viewTypes , you can just write the Adapters for each section and just use ConcatAdapter to merge all of them inside one recyclerview
This image shows 3 different viewtypes that one recyclerview has, header, content and footer.
You only create one adapter for each section, and then just use ConcatAdapter to merge them inside one recyclerview
val firstAdapter: FirstAdapter = …
val secondAdapter: SecondAdapter = …
val thirdAdapter: ThirdAdapter = …
val concatAdapter = ConcatAdapter(firstAdapter, secondAdapter,
thirdAdapter)
recyclerView.adapter = concatAdapter
Thats all you need to know, if you want to handle loading state, for example remove the last adapter after some loading happened, you can use LoadState
Just write what you really wanted to know:
fac.GetCachedValue("Auto Print Clinical Warnings").ToLower().StartsWith("y")
It's much simpler than anything with substring.
This should work with this :
var cnt = $("#div1 p").length;
switch (true) {
case (cnt >= 10 && cnt <= 20):
alert('10');
break;
case (cnt >= 21 && cnt <= 30):
alert('21');
break;
case (cnt >= 31 && cnt <= 40):
break;
default:
alert('>41');
}
use this command php artisan migrate --path=/database/migrations/my_migration.php
it worked for me..
It's because your statement does not produce output.
Besides all the warnings of Darin and lazy (they are right); the question still offerst something to learn.
If you want to execute methods that don't directly produce output, you do:
@{ Response.Redirect("~/Account/LogIn?returnUrl=Products");}
This is also true for rendering partials like:
@{ Html.RenderPartial("_MyPartial"); }
This whole thread confused the h#$l out of me until I realized you have to be running the debugger to see ANY trace or debug output. I needed a debug output (outside of the debugger) because my WebApp runs fine when I debug it but not when the debugger isn't running (SqlDataSource is instantiated correctly when running through the debugger).
Just because debug output can be seen when you're running in release mode doesn't mean you'll see anything if you're not running the debugger. Careful reading of Writing to output window of Visual Studio? gave me DebugView as an alternative. Extremely useful!
Hopefully this helps anyone else confused by this.
I use Git with Visual Studio for my port of Protocol Buffers to C#. I don't use the GUI - I just keep a command line open as well as Visual Studio.
For the most part it's fine - the only problem is when you want to rename a file. Both Git and Visual Studio would rather that they were the one to rename it. I think that renaming it in Visual Studio is the way to go though - just be careful what you do at the Git side afterwards. Although this has been a bit of a pain in the past, I've heard that it actually should be pretty seamless on the Git side, because it can notice that the contents will be mostly the same. (Not entirely the same, usually - you tend to rename a file when you're renaming the class, IME.)
But basically - yes, it works fine. I'm a Git newbie, but I can get it to do everything I need it to. Make sure you have a git ignore file for bin and obj, and *.user.
@scottyab the parametrized DatabaseUtils.queryNumEntries(db, table, whereparams) exists at API 11 +, the one without the whereparams exists since API 1. The answer would have to be creating a Cursor with a db.rawQuery:
Cursor mCount= db.rawQuery("select count(*) from users where uname='" + loginname + "' and pwd='" + loginpass +"'", null);
mCount.moveToFirst();
int count= mCount.getInt(0);
mCount.close();
I also like @Dre's answer, with the parameterized query.
For those who fear to mess anything up in your vscode json settings this is pretty easy to follow.
Open "File -> Preferences -> Keyboard Shortcuts"
or "Code -> Preferences -> Keyboard Shortcuts"
for Mac Users
In the search bar type transform
.
By default you will not have anything under Keybinding
. Now double-click on Transform to Lowercase
or Transform to Uppercase
.
Press your desired combination of keys to set your keybinding. In this case if copying off of Sublime i will press ctrl+shift+u
for uppercase or ctrl+shift+l
for lowercase.
Press Enter
on your keyboard to save and exit. Do same for the other option.
Enjoy KEYBINDING
Here's another way to handle this. It uses a single item for loop that enables you to just use continue. It prevents the unnecessary need to have extra functions for no reason. And additionally eliminates potential infinite while loops.
if something:
for _ in [0]:
# Get x
if not x:
continue
# Get y
if not y:
continue
# Get z
if not z:
continue
# Stuff that depends on x, y, and z
If you're using Dapper.SimpleSave:
//no safety checks
public static int Create<T>(object param)
{
using (SqlConnection conn = new SqlConnection(GetConnectionString()))
{
conn.Open();
conn.Create<T>((T)param);
return (int) (((T)param).GetType().GetProperties().Where(
x => x.CustomAttributes.Where(
y=>y.AttributeType.GetType() == typeof(Dapper.SimpleSave.PrimaryKeyAttribute).GetType()).Count()==1).First().GetValue(param));
}
}
Comparable
is for objects with a natural ordering. The object itself knows how it is to be ordered.
Comparator
is for objects without a natural ordering or when you wish to use a different ordering.
What Jeremiah said, plus the compiler issues the warning because the production:
*src ="anotherstring";
says: take the address of "anotherstring" -- "anotherstring" IS a char pointer -- and store that pointer indirect through src (*src = ... ) into the first char of the string "abcdef..." The warning might be baffling because there is nowhere in your code any mention of any integer: the warning seems nonsensical. But, out of sight behind the curtain, is the rule that "int" and "char" are synonymous in terms of storage: both occupy the same number of bits. The compiler doesn't differentiate when it issues the warning that you are storing into an integer. Which, BTW, is perfectly OK and legal but probably not exactly what you want in this code.
-- pete
My Solution is to define an RStudio snippet as follows:
snippet pp
"`r gsub("\\\\", "\\\\\\\\\\\\\\\\", readClipboard())`"
This snippet converts backslashes \
into double backslashes \\
. The following version will work if you prefer to convert backslahes to forward slashes /
.
snippet pp
"`r gsub("\\\\", "/", readClipboard())`"
Once your preferred snippet is defined, paste a path from the clipboard by typing p-p-TAB-ENTER (that is pp and then the tab key and then enter) and the path will be magically inserted with R friendly delimiters.
File Path Seems to be an issue here please make sure that file exists in the correct directory or give the absolute path to make sure that you are pointing to a correct file. Please log the file.getAbsolutePath() to verify that file is correct.
If anyone wanted to Add DataTable as a source of gridview then--
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("column1"));
dt.Columns.Add(new DataColumn("column2"));
DataRow dr = dt.NewRow();
dr[0] = "column1 Value";
dr[1] = "column2 Value";
dt.Rows.Add(dr);
dataGridView1.DataSource = dt;
try this,
NSString *string = @"test Data";
if ([[string lowercaseString] rangeOfString:@"data"].location == NSNotFound)
{
NSLog(@"string does not contain Data");
}
else
{
NSLog(@"string contains data!");
}
For Java programmers using Spring, I've avoided this problem using an AOP aspect that automatically retries transactions that run into transient deadlocks.
See @RetryTransaction Javadoc for more info.
use text transform property in your style tag
textTransform:'uppercase'
Let's dissect it. There are three parts:
cd
-- This is change directory command./d
-- This switch makes cd
change both drive and directory at once. Without it you would have to do cd %~d0 & cd %~p0
. (%~d0
Changs active drive, cd %~p0
change the directory).%~dp0
-- This can be dissected further into three parts:
%0
-- This represents zeroth parameter of your batch script. It expands into the name of the batch file itself.%~0
-- The ~
there strips double quotes ("
) around the expanded argument.%dp0
-- The d
and p
there are modifiers of the expansion. The d
forces addition of a drive letter and the p
adds full path.most simple answer
<a onclick="window.open(this.href,'_blank');return false;" href="http://www.foracure.org.au">Some Other Site</a>
it will work
did you tried converting the first char of the string to lowercase on if(fruits[i].charAt(0) == currChar)
and char currChar = fruits[0].charAt(0)
statements?
I believe that phrase should have been worded as follows:
bcrypt has salts built into the generated hashes to prevent rainbow table attacks.
The bcrypt
utility itself does not appear to maintain a list of salts. Rather, salts are generated randomly and appended to the output of the function so that they are remembered later on (according to the Java implementation of bcrypt
). Put another way, the "hash" generated by bcrypt
is not just the hash. Rather, it is the hash and the salt concatenated.
I always default to NOT EXISTS
.
The execution plans may be the same at the moment but if either column is altered in the future to allow NULL
s the NOT IN
version will need to do more work (even if no NULL
s are actually present in the data) and the semantics of NOT IN
if NULL
s are present are unlikely to be the ones you want anyway.
When neither Products.ProductID
or [Order Details].ProductID
allow NULL
s the NOT IN
will be treated identically to the following query.
SELECT ProductID,
ProductName
FROM Products p
WHERE NOT EXISTS (SELECT *
FROM [Order Details] od
WHERE p.ProductId = od.ProductId)
The exact plan may vary but for my example data I get the following.
A reasonably common misconception seems to be that correlated sub queries are always "bad" compared to joins. They certainly can be when they force a nested loops plan (sub query evaluated row by row) but this plan includes an anti semi join logical operator. Anti semi joins are not restricted to nested loops but can use hash or merge (as in this example) joins too.
/*Not valid syntax but better reflects the plan*/
SELECT p.ProductID,
p.ProductName
FROM Products p
LEFT ANTI SEMI JOIN [Order Details] od
ON p.ProductId = od.ProductId
If [Order Details].ProductID
is NULL
-able the query then becomes
SELECT ProductID,
ProductName
FROM Products p
WHERE NOT EXISTS (SELECT *
FROM [Order Details] od
WHERE p.ProductId = od.ProductId)
AND NOT EXISTS (SELECT *
FROM [Order Details]
WHERE ProductId IS NULL)
The reason for this is that the correct semantics if [Order Details]
contains any NULL
ProductId
s is to return no results. See the extra anti semi join and row count spool to verify this that is added to the plan.
If Products.ProductID
is also changed to become NULL
-able the query then becomes
SELECT ProductID,
ProductName
FROM Products p
WHERE NOT EXISTS (SELECT *
FROM [Order Details] od
WHERE p.ProductId = od.ProductId)
AND NOT EXISTS (SELECT *
FROM [Order Details]
WHERE ProductId IS NULL)
AND NOT EXISTS (SELECT *
FROM (SELECT TOP 1 *
FROM [Order Details]) S
WHERE p.ProductID IS NULL)
The reason for that one is because a NULL
Products.ProductId
should not be returned in the results except if the NOT IN
sub query were to return no results at all (i.e. the [Order Details]
table is empty). In which case it should. In the plan for my sample data this is implemented by adding another anti semi join as below.
The effect of this is shown in the blog post already linked by Buckley. In the example there the number of logical reads increase from around 400 to 500,000.
Additionally the fact that a single NULL
can reduce the row count to zero makes cardinality estimation very difficult. If SQL Server assumes that this will happen but in fact there were no NULL
rows in the data the rest of the execution plan may be catastrophically worse, if this is just part of a larger query, with inappropriate nested loops causing repeated execution of an expensive sub tree for example.
This is not the only possible execution plan for a NOT IN
on a NULL
-able column however. This article shows another one for a query against the AdventureWorks2008
database.
For the NOT IN
on a NOT NULL
column or the NOT EXISTS
against either a nullable or non nullable column it gives the following plan.
When the column changes to NULL
-able the NOT IN
plan now looks like
It adds an extra inner join operator to the plan. This apparatus is explained here. It is all there to convert the previous single correlated index seek on Sales.SalesOrderDetail.ProductID = <correlated_product_id>
to two seeks per outer row. The additional one is on WHERE Sales.SalesOrderDetail.ProductID IS NULL
.
As this is under an anti semi join if that one returns any rows the second seek will not occur. However if Sales.SalesOrderDetail
does not contain any NULL
ProductID
s it will double the number of seek operations required.
.model small
.stack 100h
.code
Main proc
Mov cx , 30 ; //that number control the loop 30 means the loop will
;excite 30 time
Ioopfront:
Mov ah , 1
Int 21h
Loop loopfront;
this cod will take 30 character
Well you can remove the third calendar instance.
GregorianCalendar c1 = new GregorianCalendar();
GregorianCalendar c2 = new GregorianCalendar();
c1.set(2000, 1, 1);
c2.set(2010,1, 1);
c2.add(GregorianCalendar.MILLISECOND, -1 * c1.getTimeInMillis());
I had the same error because I didn't issued a Let's Encrypt cert for the www.my-domain.com, only for my-domain.com
Issuing also for the www. and configuring the vhost to load certificates for www.my-domain.com before redirecting to https://my-domain.com did the trick.
One solution is to style the left border like so:
li { display: inline; }
li + li {
border-left: 1px solid;
margin-left:.5em;
padding-left:.5em;
}
However, this may not give you desirable results if the entire lists wraps, like it does in your example. I.e. it would give something like:
foo | bar | baz
| bob | bill
| judy
B2 container position relative
Top position B2 + of remaining height
Height of B2 + height B1 or remaining height
I would suggest you try the html tag <br>
, in case your marketing application will recognize it.
I use %0D%0A
. This should work as long as the email is HTML formatted.
<a href="mailto:[email protected]?subject=Subscribe&body=Lastame%20%3A%0D%0AFirstname%20%3A"><img alt="Subscribe" class="center" height="50" src="subscribe.png" style="width: 137px; height: 50px; color: #4da6f7; font-size: 20px; display: block;" width="137"></a>
You will likely want to take out the %20 before Firstname, otherwise you will have a space as the first character on the next line.
A note, when I tested this with your code, it worked (along with some extra spacing). Are you using a mail client that doesn't allow HTML formatting?
If you go to TextFX
menu and go to TextFX Edit
, you will see a menu item Reindent C++ Code
.
That will also format C# code.
There are many answers on this question already, but nothing fitted my needs. So i came up with my own solution, I hope it is usefull for someone:
function calledPrivate(){
var stack = new Error().stack.toString().split("\n");
function getClass(line){
var i = line.indexOf(" ");
var i2 = line.indexOf(".");
return line.substring(i,i2);
}
return getClass(stack[2])==getClass(stack[3]);
}
class Obj{
privateMethode(){
if(calledPrivate()){
console.log("your code goes here");
}
}
publicMethode(){
this.privateMethode();
}
}
var obj = new Obj();
obj.publicMethode(); //logs "your code goes here"
obj.privateMethode(); //does nothing
As you can see this system works when using this type of classes in javascript. As far as I figured out none of the methods commented above did.
Because comparison doesn't work that way. 'Y' || 'y'
is a logical-or operator; it returns 1
(true) if either of its arguments is true. Since 'Y'
and 'y'
are both true, you're comparing *answer
with 1.
What you want is if(*answer == 'Y' || *answer == 'y')
or perhaps:
switch (*answer) {
case 'Y':
case 'y':
/* Code for Y */
break;
default:
/* Code for anything else */
}
public static class SqlConnectionExtension
{
#region Public Methods
public static bool ExIsOpen(
this SqlConnection connection, MessageString errorMsg = null)
{
if (connection == null) { return false; }
if (connection.State == ConnectionState.Open) { return true; }
try
{
connection.Open();
return true;
}
catch (Exception ex) { errorMsg?.Append(ex.ToString()); }
return false;
}
public static bool ExIsReady(
this SqlConnection connction, MessageString errorMsg = null)
{
if (connction.ExIsOpen(errorMsg) == false) { return false; }
try
{
using (var command = new SqlCommand("select 1", connction))
{ return ((int)command.ExecuteScalar()) == 1; }
}
catch (Exception ex) { errorMsg?.Append(ex.ToString()); }
return false;
}
#endregion Public Methods
}
public class MessageString : IDisposable
{
#region Protected Fields
protected StringBuilder _messageBuilder = new StringBuilder();
#endregion Protected Fields
#region Public Constructors
public MessageString()
{
}
public MessageString(int capacity)
{
_messageBuilder.Capacity = capacity;
}
public MessageString(string value)
{
_messageBuilder.Append(value);
}
#endregion Public Constructors
#region Public Properties
public int Length {
get { return _messageBuilder.Length; }
set { _messageBuilder.Length = value; }
}
public int MaxCapacity {
get { return _messageBuilder.MaxCapacity; }
}
#endregion Public Properties
#region Public Methods
public static implicit operator string(MessageString ms)
{
return ms.ToString();
}
public static MessageString operator +(MessageString ms1, MessageString ms2)
{
MessageString ms = new MessageString(ms1.Length + ms2.Length);
ms.Append(ms1.ToString());
ms.Append(ms2.ToString());
return ms;
}
public MessageString Append<T>(T value) where T : IConvertible
{
_messageBuilder.Append(value);
return this;
}
public MessageString Append(string value)
{
return Append<string>(value);
}
public MessageString Append(MessageString ms)
{
return Append(ms.ToString());
}
public MessageString AppendFormat(string format, params object[] args)
{
_messageBuilder.AppendFormat(CultureInfo.InvariantCulture, format, args);
return this;
}
public MessageString AppendLine()
{
_messageBuilder.AppendLine();
return this;
}
public MessageString AppendLine(string value)
{
_messageBuilder.AppendLine(value);
return this;
}
public MessageString AppendLine(MessageString ms)
{
_messageBuilder.AppendLine(ms.ToString());
return this;
}
public MessageString AppendLine<T>(T value) where T : IConvertible
{
Append<T>(value);
AppendLine();
return this;
}
public MessageString Clear()
{
_messageBuilder.Clear();
return this;
}
public void Dispose()
{
_messageBuilder.Clear();
_messageBuilder = null;
}
public int EnsureCapacity(int capacity)
{
return _messageBuilder.EnsureCapacity(capacity);
}
public bool Equals(MessageString ms)
{
return Equals(ms.ToString());
}
public bool Equals(StringBuilder sb)
{
return _messageBuilder.Equals(sb);
}
public bool Equals(string value)
{
return Equals(new StringBuilder(value));
}
public MessageString Insert<T>(int index, T value)
{
_messageBuilder.Insert(index, value);
return this;
}
public MessageString Remove(int startIndex, int length)
{
_messageBuilder.Remove(startIndex, length);
return this;
}
public MessageString Replace(char oldChar, char newChar)
{
_messageBuilder.Replace(oldChar, newChar);
return this;
}
public MessageString Replace(string oldValue, string newValue)
{
_messageBuilder.Replace(oldValue, newValue);
return this;
}
public MessageString Replace(char oldChar, char newChar, int startIndex, int count)
{
_messageBuilder.Replace(oldChar, newChar, startIndex, count);
return this;
}
public MessageString Replace(string oldValue, string newValue, int startIndex, int count)
{
_messageBuilder.Replace(oldValue, newValue, startIndex, count);
return this;
}
public override string ToString()
{
return _messageBuilder.ToString();
}
public string ToString(int startIndex, int length)
{
return _messageBuilder.ToString(startIndex, length);
}
#endregion Public Methods
}
var json = {"ListID" : "1", "ItemName":"test"};
$.ajax({
url: url,
type: 'POST',
data: username,
cache:false,
beforeSend: function(xhr) {
xhr.setRequestHeader("Accept", "application/json");
xhr.setRequestHeader("Content-Type", "application/json");
},
success:function(response){
console.log("Success")
},
error : function(xhr, status, error) {
console.log("error")
}
);
If optimizing for dev + production, you could try something like this in your config:
const dev = process.env.NODE_ENV !== 'production'
// in config
{
devtool: dev ? 'eval-cheap-module-source-map' : 'source-map',
}
I am using webpack 2.1.0-beta.19
see http://api.jquery.com/prev/
var link = $("#me").parent("div").prev("h3").find("b");
alert(link.text());
The target. dot works on objects; arrow works on pointers to objects.
std::string str("foo");
std::string * pstr = new std::string("foo");
str.size ();
pstr->size ();
How about iTextSharp?
iText is a PDF (among others) generation library that is also ported (and kept in sync) to C#.
The jQuery-rss project is pretty lightweight and doesn't impose any particular styling.
The syntax can be as simple as
$("#rss-feeds").rss("http://www.recruiter.com/feed/career.xml")
See a working example at http://jsfiddle.net/jhfrench/AFHfn/
You can do the following which escapes both PHP and MySQL.
<?
$text = '<a href="javascript:window.open(\\\'http://www.google.com\\\');"></a>';
?>
This will reflect MySQL as
<a href="javascript:window.open('http://www.google.com');"></a>
How does it work?
We know that both PHP and MySQL apostrophes can be escaped with backslash and then apostrophe.
\'
Because we are using PHP to insert into MySQL, we need PHP to still write the backslash to MySQL so it too can escape it. So we use the PHP escape character of backslash-backslash together with backslash-apostrophe to achieve this.
\\\'
You need to set the error mode attribute PDO::ATTR_ERRMODE to PDO::ERRMODE_EXCEPTION.
And since you expect the exception to be thrown by the prepare() method you should disable the PDO::ATTR_EMULATE_PREPARES* feature. Otherwise the MySQL server doesn't "see" the statement until it's executed.
<?php
try {
$pdo = new PDO('mysql:host=localhost;dbname=test;charset=utf8', 'localonly', 'localonly');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$pdo->prepare('INSERT INTO DoesNotExist (x) VALUES (?)');
}
catch(Exception $e) {
echo 'Exception -> ';
var_dump($e->getMessage());
}
prints (in my case)
Exception -> string(91) "SQLSTATE[42S02]: Base table or view not found:
1146 Table 'test.doesnotexist' doesn't exist"
see http://wezfurlong.org/blog/2006/apr/using-pdo-mysql/
EMULATE_PREPARES=true seems to be the default setting for the pdo_mysql driver right now.
The query cache thing has been fixed/change since then and with the mysqlnd driver I hadn't problems with EMULATE_PREPARES=false (though I'm only a php hobbyist, don't take my word on it...)
*) and then there's PDO::MYSQL_ATTR_DIRECT_QUERY - I must admit that I don't understand the interaction of those two attributes (yet?), so I set them both, like
$pdo = new PDO('mysql:host=localhost;dbname=test;charset=utf8', 'localonly', 'localonly', array(
PDO::ATTR_EMULATE_PREPARES=>false,
PDO::MYSQL_ATTR_DIRECT_QUERY=>false,
PDO::ATTR_ERRMODE=>PDO::ERRMODE_EXCEPTION
));
If copy-dependencies, unpack, pack, etc., are important for your project you shouldn't ignore it. You have to enclose your <plugins>
in <pluginManagement>
tested with Eclipse Indigo SR1, maven 2.2.1
As of now (March 2018) & version 1.21.0, you can go to Settings, search for 'zoom' and change "editor.mouseWheelZoom": false
which is false by default to true
. This will allow to zoom in/out on VS Code using control button and mouse - ctrl + scrollUp/scrollDown
. For changing the fontSize
of the overall working space/screen of VS Code, refer to Alegozalves's answer above.
def updateJsonFile():
jsonFile = open("replayScript.json", "r") # Open the JSON file for reading
data = json.load(jsonFile) # Read the JSON into the buffer
jsonFile.close() # Close the JSON file
## Working with buffered content
tmp = data["location"]
data["location"] = path
data["mode"] = "replay"
## Save our changes to JSON file
jsonFile = open("replayScript.json", "w+")
jsonFile.write(json.dumps(data))
jsonFile.close()
If you're using ES6 or higher, the cleanest way is to construct an array of the items and use Array.includes
:
['a', 'b', 'c'].includes('b')
This has some inherent benefits over indexOf
because it can properly test for the presence of NaN
in the list, and can match missing array elements such as the middle one in [1, , 2]
to undefined
. includes
also works on JavaScript typed arrays such as Uint8Array
.
If you're concerned about browser support (such as for IE or Edge), you can check Array.includes
at CanIUse.Com, and if you want to target a browser or browser version that's missing includes
, I recommend polyfill.io for polyfilling.
You could add a new isInList
property to strings as follows:
if (!String.prototype.isInList) {
Object.defineProperty(String.prototype, 'isInList', {
get: () => function(...args) {
let value = this.valueOf();
for (let i = 0, l = args.length; i < l; i += 1) {
if (arguments[i] === value) return true;
}
return false;
}
});
}
Then use it like so:
'fox'.isInList('weasel', 'fox', 'stoat') // true
'fox'.isInList('weasel', 'stoat') // false
You can do the same thing for Number.prototype
.
Note that Object.defineProperty
cannot be used in IE8 and earlier, or very old versions of other browsers. However, it is a far superior solution to String.prototype.isInList = function() { ... }
because using simple assignment like that will create an enumerable property on String.prototype
, which is more likely to break code.
If you are using a modern browser, indexOf
always works. However, for IE8 and earlier you'll need a polyfill.
If indexOf
returns -1, the item is not in the list. Be mindful though, that this method will not properly check for NaN
, and while it can match an explicit undefined
, it can’t match a missing element to undefined
as in the array [1, , 2]
.
indexOf
or includes
in IE, or any other browser/version lacking supportIf you don't want to use a service like polyfill.io as mentioned above, you can always include in your own source code standards-compliant custom polyfills. For example, Mozilla Developer Network has one for indexOf
.
In this situation where I had to make a solution for Internet Explorer 7, I "rolled my own" simpler version of the indexOf()
function that is not standards-compliant:
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function(item) {
var i = this.length;
while (i--) {
if (this[i] === item) return i;
}
return -1;
}
}
However, I don't think modifying Array.prototype
is the best answer in the long term. Modifying Object
and Array
prototypes in JavaScript can lead to serious bugs. You need to decide whether doing so is safe in your own environment. Of primary note is that iterating an array (when Array.prototype has added properties) with for ... in
will return the new function name as one of the keys:
Array.prototype.blah = function() { console.log('blah'); };
let arr = [1, 2, 3];
for (let x in arr) { console.log(x); }
// Result:
0
1
2
blah // Extra member iterated over!
Your code may work now, but the moment someone in the future adds a third-party JavaScript library or plugin that isn't zealously guarding against inherited keys, everything can break.
The old way to avoid that breakage is, during enumeration, to check each value to see if the object actually has it as a non-inherited property with if (arr.hasOwnProperty(x))
and only then work with that x
.
The new ES6 ways to avoid this extra-key problem are:
Use of
instead of in
, for (let x of arr)
. However, unless you can guarantee that all of your code and third-party libraries strictly stick to this method, then for the purposes of this question you'll probably just want to use includes
as stated above.
Define your new properties on the prototype using Object.defineProperty()
, as this will make the property (by default) non-enumerable. This only truly solves the problem if all the JavaScript libraries or modules you use also do this.
Use:
filename=$1
IFS=$'\n'
for next in `cat $filename`; do
echo "$next read from $filename"
done
exit 0
If you have set IFS
differently you will get odd results.
Minor changes required for Kafka 0.10 and the new consumer compared to laughing_man's answer:
message.max.bytes
and replica.fetch.max.bytes
. message.max.bytes
has to be equal or smaller(*) than replica.fetch.max.bytes
.max.request.size
to send the larger message.max.partition.fetch.bytes
to receive larger messages.(*) Read the comments to learn more about message.max.bytes
<=replica.fetch.max.bytes
Add this in the head section of your html
<link rel="icon" type="image/gif/png" href="mouse_select_left.png">
Answer using TypeScript spread operator (...)
// Your key
const key = 'two';
// Your array
const arr = [
'one',
'two',
'three'
];
// Get either the index or -1
const index = arr.indexOf(key); // returns 0
// Despite a real index, or -1, use spread operator and Array.prototype.slice()
const newArray = (index > -1) ? [
...arr.slice(0, index),
...arr.slice(index + 1)
] : arr;
You will first need to create a custom layout xml which will represent a single item in your list. You will add your two buttons to this layout along with any other items you want to display from your list.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/list_item_string"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:paddingLeft="8dp"
android:textSize="18sp"
android:textStyle="bold" />
<Button
android:id="@+id/delete_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="5dp"
android:text="Delete" />
<Button
android:id="@+id/add_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/delete_btn"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:text="Add" />
</RelativeLayout>
Next you will need to create a Custom ArrayAdapter Class which you will use to inflate your xml layout, as well as handle your buttons and on click events.
public class MyCustomAdapter extends BaseAdapter implements ListAdapter {
private ArrayList<String> list = new ArrayList<String>();
private Context context;
public MyCustomAdapter(ArrayList<String> list, Context context) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int pos) {
return list.get(pos);
}
@Override
public long getItemId(int pos) {
return list.get(pos).getId();
//just return 0 if your list items do not have an Id variable.
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.my_custom_list_layout, null);
}
//Handle TextView and display string from your list
TextView listItemText = (TextView)view.findViewById(R.id.list_item_string);
listItemText.setText(list.get(position));
//Handle buttons and add onClickListeners
Button deleteBtn = (Button)view.findViewById(R.id.delete_btn);
Button addBtn = (Button)view.findViewById(R.id.add_btn);
deleteBtn.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
//do something
list.remove(position); //or some other task
notifyDataSetChanged();
}
});
addBtn.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
//do something
notifyDataSetChanged();
}
});
return view;
}
}
Finally, in your activity you can instantiate your custom ArrayAdapter class and set it to your listview.
public class MyActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_activity);
//generate list
ArrayList<String> list = new ArrayList<String>();
list.add("item1");
list.add("item2");
//instantiate custom adapter
MyCustomAdapter adapter = new MyCustomAdapter(list, this);
//handle listview and assign adapter
ListView lView = (ListView)findViewById(R.id.my_listview);
lView.setAdapter(adapter);
}
Hope this helps!
Did have identical problem with on XP machine when installing javacv
and opencv
in combination with Eclipse. It turned out that I was missing the following files:
Once these were installed, the project compiled and ran OK.
If you are to replace a fixed string or some pattern, I would also like to add the bash builtin pattern string replacement variable substitution construct. Instead of describing it myself, I am quoting the section from the bash manual:
${parameter/pattern/string}
The pattern is expanded to produce a pattern just as in pathname expansion. parameter is expanded and the longest match of pattern against its value is replaced with string. If pattern begins with
/
, all matches of pattern are replaced with string. Normally only the first match is replaced. If pattern begins with#
, it must match at the beginning of the expanded value of parameter. If pattern begins with%
, it must match at the end of the expanded value of parameter. If string is null, matches of pattern are deleted and the/
following pattern may be omitted. If parameter is@
or*
, the substitution operation is applied to each positional parameter in turn, and the expansion is the resultant list. If parameter is an array variable subscripted with@
or*
, the substitution operation is applied to each member of the array in turn, and the expansion is the resultant list.
Change it to this:
switch (enumExample) {
case VALUE_A: {
//..
break;
}
}
The clue is in the error. You don't need to qualify case
labels with the enum type, just its value.
use a cursor
ADDENDUM: [MS SQL cursor example]
declare @field1 int
declare @field2 int
declare cur CURSOR LOCAL for
select field1, field2 from sometable where someotherfield is null
open cur
fetch next from cur into @field1, @field2
while @@FETCH_STATUS = 0 BEGIN
--execute your sproc on each row
exec uspYourSproc @field1, @field2
fetch next from cur into @field1, @field2
END
close cur
deallocate cur
in MS SQL, here's an example article
note that cursors are slower than set-based operations, but faster than manual while-loops; more details in this SO question
ADDENDUM 2: if you will be processing more than just a few records, pull them into a temp table first and run the cursor over the temp table; this will prevent SQL from escalating into table-locks and speed up operation
ADDENDUM 3: and of course, if you can inline whatever your stored procedure is doing to each user ID and run the whole thing as a single SQL update statement, that would be optimal
Try this https://ngrok.com/docs#expose
Just run ngrok 3000
, 3000
is the port number you want to expose to the internet. You can insert the port number which you want to expose, for rails its 3000. This will tunnel your localhost to the internet and you will be able to view your local host from anywhere
For a RollingLogFileAppender you also need these elements and values:
<rollingStyle value="Date" />
<staticLogFileName value="false" />
Yes, but you need to move the variable assignment into the query:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
Test case:
CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (123456, 5);
INSERT INTO user VALUES (111111, 5);
Result:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
+--------+-------+
| user | group |
+--------+-------+
| 123456 | 5 |
| 111111 | 5 |
+--------+-------+
2 rows in set (0.00 sec)
Note that for SET
, either =
or :=
can be used as the assignment operator. However inside other statements, the assignment operator must be :=
and not =
because =
is treated as a comparison operator in non-SET statements.
UPDATE:
Further to comments below, you may also do the following:
SET @user := 123456;
SELECT `group` FROM user LIMIT 1 INTO @group;
SELECT * FROM user WHERE `group` = @group;
new SecondForm().setVisible(true);
You can either use setVisible(false)
or dispose()
method to disappear current form.
For those who want a right triangle arrow, here you go:
STEP 1: Create a drawable XML file, copy and paste the following XML content into your drawable XML. (Please be informed that you can use any name for your drawable XML file. For my case, I name it "v_right_arrow")
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item >
<rotate
android:fromDegrees="45"
android:toDegrees="-45"
android:pivotX="15%"
android:pivotY="-36%" >
<shape
android:shape="rectangle" >
<stroke android:color="@android:color/transparent" android:width="1dp"/>
<solid
android:color="#000000" />
</shape>
</rotate>
</item>
</layer-list>
STEP 2: In your layout's XML, create a View and bind its background to the drawable XML that you have just created in STEP 1. For my case, I bind v_right_arrow to my View's background property.
<View
android:layout_width="200dp"
android:layout_height="200dp"
android:background="@drawable/v_right_arrow">
</View>
Sample output:
Hope this helps, good luck!
There is no built-in functionality in VBS for that, however, you can use the FileSystemObject FileExists function for that :
Option Explicit
DIM fso
Set fso = CreateObject("Scripting.FileSystemObject")
If (fso.FileExists("C:\Program Files\conf")) Then
WScript.Echo("File exists!")
WScript.Quit()
Else
WScript.Echo("File does not exist!")
End If
WScript.Quit()
Had the same problem. Was a little bit confused but the thing was I had make a git init --bare on root, that means that you won't be able to push because of you don't have any rights. Instead make a new User or in my case I used Pi User and made git init --bare there, which then later on it worked.
git config --global http.postBuffer 524288000
Maximum size in bytes of the buffer used by smart HTTP transports when POSTing data to the remote system. For requests larger than this buffer size, HTTP/1.1 and Transfer-Encoding: chunked is used to avoid creating a massive pack file locally. Default is 1 MiB, which is sufficient for most requests.
Simply create it as new byte[100]
it will be initialized with 0 by default
the -webkit-transform: translate3d(0, 0, 0);
trick didn't work for me. In my case I had set a parent to:
// parent
height: 100vh;
Changing that to:
height: auto;
min-height: 100vh;
Solved the issue in case someone else is facing the same situation.
If you are working with php in windows, you can just access to the file "php.ini" located in your php instalation folder and uncomment the ";extension=xmlrpc" line deleting the ";" ("extension=xmlrpc")
In Ruby on Rails 6.0.1 go to config > locales > application.rb y agrega lo siguiente:
require_relative 'boot'
require 'rails/all'
# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)
module CrudRubyOnRails6
class Application < Rails::Application
# Initialize configuration defaults for originally generated Rails version.
config.load_defaults 6.0
config.active_record.default_timezone = :local
config.time_zone = 'Lima'
# Settings in config/environments/* take precedence over those specified here.
# Application configuration can go into files in config/initializers
# -- all .rb files in that directory are automatically loaded after loading
# the framework and any gems in your application.
end
end
You can see that I am configuring the time zone with 2 lines:
config.active_record.default_timezone =: local
config.time_zone = 'Lima'
I hope it helps those who are working with Ruby on Rails 6.0.1
I think you can simple call like this, this will give you result value.
this.$route.query.page
Look image $route is object in Vue Instance and you can access with this keyword and next you can select object properties like above one :
Have a look Vue-router document for selecting queries value :
Using Spring Data JPA there is a provision to select specific columns from database
---- In DAOImpl ----
@Override
@Transactional
public List<Employee> getAllEmployee() throws Exception {
LOGGER.info("Inside getAllEmployee");
List<Employee> empList = empRepo.getNameAndCityOnly();
return empList;
}
---- In Repo ----
public interface EmployeeRepository extends CrudRepository<Employee,Integer> {
@Query("select e.name, e.city from Employee e" )
List<Employee> getNameAndCityOnly();
}
It worked 100% in my case. Thanks.
If you really need to use sys.path.insert, consider leaving sys.path[0] as it is:
sys.path.insert(1, path_to_dev_pyworkbooks)
This could be important since 3rd party code may rely on sys.path documentation conformance:
As initialized upon program startup, the first item of this list, path[0], is the directory containing the script that was used to invoke the Python interpreter.
You can also used like this
<a href="<?php echo 'index.php'; ?>">Index Page</a>
<a href="<?php echo 'page2.php'; ?>">Page 2</a>
You do not need regular expressions to check if a substring exists in a string.
line = 'This,is,a,sample,string'
result = bool('sample' in line) # returns True
If you want to know if a string contains a pattern then you should use re.search
line = 'This,is,a,sample,string'
result = re.search(r'sample', line) # finds 'sample'
This is best used with pattern matching, for example:
line = 'my name is bob'
result = re.search(r'my name is (\S+)', line) # finds 'bob'
The only way to add headers to a request from inside a browser is use the XmlHttpRequest setRequestHeader method.
Using this with "GET" request will download the resource. The trick then is to access the resource in the intended way. Ostensibly you should be able to allow the GET response to be cacheable for a short period, hence navigation to a new URL or the creation of an IMG tag with a src url should use the cached response from the previous "GET". However that is quite likely to fail especially in IE which can be a bit of a law unto itself where the cache is concerned.
Ultimately I agree with Mehrdad, use of query string is easiest and most reliable method.
Another quirky alternative is use an XHR to make a request to a URL that indicates your intent to access a resource. It could respond with a session cookie which will be carried by the subsequent request for the image or link.
Use This chunk of code..
.card::-webkit-scrollbar {
display: none;
}
The os.makedirs
function does this. Try the following:
import os
import errno
filename = "/foo/bar/baz.txt"
if not os.path.exists(os.path.dirname(filename)):
try:
os.makedirs(os.path.dirname(filename))
except OSError as exc: # Guard against race condition
if exc.errno != errno.EEXIST:
raise
with open(filename, "w") as f:
f.write("FOOBAR")
The reason to add the try-except
block is to handle the case when the directory was created between the os.path.exists
and the os.makedirs
calls, so that to protect us from race conditions.
In Python 3.2+, there is a more elegant way that avoids the race condition above:
import os
filename = "/foo/bar/baz.txt"
os.makedirs(os.path.dirname(filename), exist_ok=True)
with open(filename, "w") as f:
f.write("FOOBAR")
As others have said, the SVN Book is the best place to start and a great reference once you've gotten your sea legs. Now, to your questions ...
How often do you commit? As often as one would press ctrl + s?
Often, but not as often as you press ctrl + s. It's a matter of personal taste and/or team policy. Personally I would say commit when you complete a functional piece of code, however small.
What is a Branch and what is a Tag and how do you control them?
First, trunk is where you do your active development. It is the mainline of your code. A branch is some deviation from the mainline. It could be a major deviation, like a previous release, or just a minor tweak you want to try out. A tag is a snapshot of your code. It's a way to attach a label or bookmark to a particular revision.
It's also worth mentioning that in subversion, trunk, branches and tags are only convention. Nothing stops you from doing work in tags or having branches that are your mainline, or disregarding the tag-branch-trunk scheme all together. But, unless you have a very good reason, it's best to stick with convention.
What goes into the SVN? Only Source Code or do you share other files here aswell?
Also a personal or team choice. I prefer to keep anything related to the build in my repository. That includes config files, build scripts, related media files, docs, etc. You should not check in files that need to be different on each developer's machine. Nor do you need to check in by-products of your code. I'm thinking mostly of build folders, object files, and the like.
"Obliberating" contents from a svn repository, i.e. wiping this contents from the disc, can be done as described in this article http://www.limilabs.com/blog/how-to-permanently-remove-svn-folder
It requires access to the server side svn repository, thus you must have some admin privileges.
It works by (a) dumping the repository content into a file, (b) excluding some contents and (c) wiping and re-creating the plain repository again and eventually by (d) loading the filtered repository contents:
svnadmin dump "path/to/svnrepo" > svnrepo.txt // (a)
svndumpfilter exclude "my/folder" < svnrepo.txt > filtered.txt // (b)
rm -rf "path/to/svnrepo" && svnadmin create "path/to/svnrepo" // (c)
svnadmin load "path/to/svnrepo" < filtered.txt // (d)
The repository counter is unchanged by this operations. However, your repository is now "missing" all those revision numbers used to create that contents you removed in step (b).
Subversion 1.7.5 appears to handle this "missing" revisions pretty well. Using "svn ls -r $missing" for example, reports the very same as "svn ls -r $(( missing - 1))".
Contrary to this, my (pretty old) VIEWVC reports "no contents" when querying a "missing" revision.
Have you gone through google's geocoding api. The following link shall help you get started: http://code.google.com/apis/maps/documentation/geocoding/#GeocodingRequests
Give hibernate.connection.url
as "jdbc:oracle:thin:@127.0.0.1:1521:xe"
then you can solve above issue. Because oracle's default SID is "xe" so we should give like this. When I gave like this data has been inserted into DB without any SQL exceptions, it's my real time experience.
Yes! In your settings.py define the following
LOGIN_REDIRECT_URL = '/your-path'
And have '/your-path' be a simple View that looks up self.request.user
and does whatever logic it needs to return a HttpResponseRedirect
object.
A better way might be to define a simple URL like '/simple'
that does the lookup logic there. The URL looks more beautiful, saves you some work, etc.
The instantiateViewControllerWithIdentifier
is the Storyboard ID
.
NextViewController *NVC = [self.storyboard instantiateViewControllerWithIdentifier:@"NextViewController"];
[self presentViewController:NVC animated:YES completion:nil];
While it may immediately seem useful to utilize class instance variables, since class instance variable are shared among subclasses and they can be referred to within both singleton and instance methods, there is a singificant drawback. They are shared and so subclasses can change the value of the class instance variable, and the base class will also be affected by the change, which is usually undesirable behavior:
class C
@@c = 'c'
def self.c_val
@@c
end
end
C.c_val
=> "c"
class D < C
end
D.instance_eval do
def change_c_val
@@c = 'd'
end
end
=> :change_c_val
D.change_c_val
(irb):12: warning: class variable access from toplevel
=> "d"
C.c_val
=> "d"
Rails introduces a handy method called class_attribute. As the name implies, it declares a class-level attribute whose value is inheritable by subclasses. The class_attribute value can be accessed in both singleton and instance methods, as is the case with the class instance variable. However, the huge benefit with class_attribute in Rails is subclasses can change their own value and it will not impact parent class.
class C
class_attribute :c
self.c = 'c'
end
C.c
=> "c"
class D < C
end
D.c = 'd'
=> "d"
C.c
=> "c"
In C, use the strstr()
standard library function:
const char *str = "/user/desktop/abc/post/";
const int exists = strstr(str, "/abc/") != NULL;
Take care to not accidentally find a too-short substring (this is what the starting and ending slashes are for).
If you can use project configurations in all your environments, that would make defining a 64- and 32-bit symbol easy. So you'd have project configurations like this:
32-bit Debug
32-bit Release
64-bit Debug
64-bit Release
EDIT: These are generic configurations, not targetted configurations. Call them whatever you want.
If you can't do that, I like Jared's idea.
This is not a bug- you can only transition on ordinal/calculable properties (an easy way of thinking of this is any property with a numeric start and end number value..though there are a few exceptions).
This is because transitions work by calculating keyframes between two values, and producing an animation by extrapolating intermediate amounts.
visibility
in this case is a binary setting (visible/hidden), so once the transition duration elapses, the property simply switches state, you see this as a delay- but it can actually be seen as the final keyframe of the transition animation, with the intermediary keyframes not having been calculated (what constitutes the values between hidden/visible? Opacity? Dimension? As it is not explicit, they are not calculated).
opacity
is a value setting (0-1), so keyframes can be calculated across the duration provided.
A list of transitionable (animatable) properties can be found here
Similar to Luke's answer, but with GET.
Place this php-code in a php-page, ex. getpage.php:
<?php
$_SESSION['size'] = $_GET['size'];
?>
Then call it with a jQuery script like this:
$.get( "/getpage.php?size=1");
Agree with Federico. In some cases you may run into problems using POST, although not sure if it can be browser related.
You could use the rails_default_value gem. eg:
class Foo < ActiveRecord::Base
# ...
default :bar => 'some default value'
# ...
end
Use this expression:
/\(([^()]+)\)/g
e.g:
function()
{
var mts = "something/([0-9])/([a-z])".match(/\(([^()]+)\)/g );
alert(mts[0]);
alert(mts[1]);
}
If you want force stop your thread:
thread._Thread_stop()
For me works very good.
float is the closest equivalent.
For Lat/Long as OP mentioned.
A metre is 1/40,000,000 of the latitude, 1 second is around 30 metres. Float/double give you 15 significant figures. With some quick and dodgy mental arithmetic... the rounding/approximation errors would be the about the length of this fill stop -> "."
There is a handy tool which saves a lot of time at
http://tools.perceptus.ca/text-wiz.php?ops=7
You just have to feed in the table name, field names and the data - tab separated and hit Go!
You'll need to consider this in context of the application. In general, you should design an application, not a database (the database simply being part of the application).
Consider how your application should respond to various cases.
The default action is to restrict (i.e. not permit) the operation, which is normally what you want as it prevents stupid programming errors. However, on DELETE CASCADE can also be useful. It really depends on your application and how you intend to delete particular objects.
Personally, I'd use InnoDB because it doesn't trash your data (c.f. MyISAM, which does), rather than because it has FK constraints.
Use the --version
parameter (shortcut -v
):
$ gem install rails -v 0.14.1
You can also use version comparators like >=
or ~>
$ gem install rails -v '~> 0.14.0'
Or with newer versions of gem even:
$ gem install rails:0.14.4 rubyzip:'< 1'
…
Successfully installed rails-0.14.4
Successfully installed rubyzip-0.9.9
npm ws was the answer for me. I found it less intrusive and more straight forward. With it was also trivial to mix websockets with rest services. Shared simple code on this post.
var WebSocketServer = require("ws").Server;
var http = require("http");
var express = require("express");
var port = process.env.PORT || 5000;
var app = express();
app.use(express.static(__dirname+ "/../"));
app.get('/someGetRequest', function(req, res, next) {
console.log('receiving get request');
});
app.post('/somePostRequest', function(req, res, next) {
console.log('receiving post request');
});
app.listen(80); //port 80 need to run as root
console.log("app listening on %d ", 80);
var server = http.createServer(app);
server.listen(port);
console.log("http server listening on %d", port);
var userId;
var wss = new WebSocketServer({server: server});
wss.on("connection", function (ws) {
console.info("websocket connection open");
var timestamp = new Date().getTime();
userId = timestamp;
ws.send(JSON.stringify({msgType:"onOpenConnection", msg:{connectionId:timestamp}}));
ws.on("message", function (data, flags) {
console.log("websocket received a message");
var clientMsg = data;
ws.send(JSON.stringify({msg:{connectionId:userId}}));
});
ws.on("close", function () {
console.log("websocket connection close");
});
});
console.log("websocket server created");
You can do:
User.find_or_create_by(first_name: 'Penélope', last_name: 'Lopez')
User.where(first_name: 'Penélope', last_name: 'Lopez').first_or_create
Or to just initialize:
User.find_or_initialize_by(first_name: 'Penélope', last_name: 'Lopez')
User.where(first_name: 'Penélope', last_name: 'Lopez').first_or_initialize
Consider the Simple Program listed below,
//we create object user
let User = { name: 'Justin' };
//a Hello Function is created to Alert the object User
function Hello() {
alert(this.name);
}
//since there the value of this is lost we need to bind user to use this keyword
let user = Hello.bind(User);
user();
//we create an instance to refer the this keyword (this.name);
Simply replacing .bin with .tar.bz2 is not enough, for NDK releases older than 10b. For example, https://dl.google.com/android/ndk/android-ndk-r10b-linux-x86_64.tar.bz2 is not a valid link.
Turned out that the correct link for 10b was: https://dl.google.com/android/ndk/android-ndk32-r10b-linux-x86_64.tar.bz2 (note the additional '32'). However, this doesn't seem to apply to e.g. 10a, as this link doesn't work: https://dl.google.com/android/ndk/android-ndk32-r10a-linux-x86_64.tar.bz2 .
Bottom line: use http://web.archive.org until Google fixes this, if ever...
I think that the best solution is to use java.sql.Savepoint
.
Before you execute a query which can throw SQLException
, use the method Connection.setSavepoint()
, and if an exception is thrown you only rollback to this savepoint, not the whole transaction.
Example code:
Connection conn = null;
Savepoint savepoint = null;
try {
conn = getConnection();
savepoint = conn.setSavepoint();
//execute some query
} catch(SQLException e) {
if(conn != null && savepoint != null) {
conn.rollback(savepoint);
}
} finally {
if(conn != null) {
try {
conn.close();
} catch(SQLException e) {}
}
}
would this work for you?
Console.Write(((int)(3.4679999999*100))/100.0);
It feels pretty hacky, but I managed to get the correct look by adding an extra column and row beyond what is needed. Then I filled the extra column with a Space in each row defining a height and filled the extra row with a Space in each col defining a width. For extra flexibility, I imagine these Space sizes could be set in code to provide something similar to weights. I tried to add a screenshot, but I do not have the reputation necessary.
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnCount="9"
android:orientation="horizontal"
android:rowCount="8" >
<Button
android:layout_columnSpan="2"
android:layout_gravity="fill"
android:layout_rowSpan="2"
android:text="1" />
<Button
android:layout_columnSpan="2"
android:layout_gravity="fill_horizontal"
android:text="2" />
<Button
android:layout_gravity="fill_vertical"
android:layout_rowSpan="4"
android:text="3" />
<Button
android:layout_columnSpan="3"
android:layout_gravity="fill"
android:layout_rowSpan="2"
android:text="4" />
<Button
android:layout_columnSpan="3"
android:layout_gravity="fill_horizontal"
android:text="5" />
<Button
android:layout_columnSpan="2"
android:layout_gravity="fill_horizontal"
android:text="6" />
<Space
android:layout_width="36dp"
android:layout_column="0"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="1"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="2"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="3"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="4"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="5"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="6"
android:layout_row="7" />
<Space
android:layout_width="36dp"
android:layout_column="7"
android:layout_row="7" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="0" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="1" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="2" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="3" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="4" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="5" />
<Space
android:layout_height="36dp"
android:layout_column="8"
android:layout_row="6" />
</GridLayout>
My 2 cents addition to the answers here are:
With reference to Field or Property access (away from performance considerations) both are legitimately accessed by means of getters and setters, thus, my model logic can set/get them in the same manner. The difference comes to play when the persistence runtime provider (Hibernate, EclipseLink or else) needs to persist/set some record in Table A which has a foreign key referring to some column in Table B. In case of a Property access type, the persistence runtime system uses my coded setter method to assign the cell in Table B column a new value. In case of a Field access type, the persistence runtime system sets the cell in Table B column directly. This difference is not of importance in the context of a uni-directional relationship, yet it is a MUST to use my own coded setter method (Property access type) for a bi-directional relationship provided the setter method is well designed to account for consistency. Consistency is a critical issue for bi-directional relationships refer to this link for a simple example for a well-designed setter.
With reference to Equals/hashCode: It is impossible to use the Eclipse auto-generated Equals/hashCode methods for entities participating in a bi-directional relationship, otherwise they will have a circular reference resulting in a stackoverflow Exception. Once you try a bidirectional relationship (say OneToOne) and auto-generate Equals() or hashCode() or even toString() you will get caught in this stackoverflow exception.
127 - command not found
example: $caat The error message will
bash:
caat: command not found
now you check using echo $?
The solution which worked for me is, when you get the message:
Waiting for HOME ('android.process.acore') to be launched...
Wait for few seconds and then right click on the project and click run as Android application once again.
I recommend the FileHelpers Library which is a free and easy to use .NET library to import/export data from EXCEL, fixed length or delimited records in files, strings or streams + More.
The Excel Data Link Documentation Section http://filehelpers.sourceforge.net/example_exceldatalink.html
If you can stand to use sed
(possibly execute from within your program, it'd be as simple as:
sed 's/(.*)//g'
If you set "Use regular expressions" flag then \n would be translated. But keep in mind that you would have to modify you search term to be regexp friendly. In your case it should be escaped like this "\~\~\?" (no quotes).
URIs are a standard for identifying documents using a short string of numbers, letters, and symbols. They are defined by RFC 3986 - Uniform Resource Identifier (URI): Generic Syntax. URLs, URNs, and URCs are all types of URI.
Contains information about how to fetch a resource from its location. For example:
http://example.com/mypage.html
ftp://example.com/download.zip
mailto:[email protected]
file:///home/user/file.txt
tel:1-888-555-5555
http://example.com/resource?foo=bar#fragment
/other/link.html
(A relative URL, only useful in the context of another URL)URLs always start with a protocol (http
) and usually contain information such as the network host name (example.com
) and often a document path (/foo/mypage.html
). URLs may have query parameters and fragment identifiers.
Identifies a resource by a unique and persistent name, but doesn't necessarily tell you how to locate it on the internet. It usually starts with the prefix urn:
For example:
urn:isbn:0451450523
to identify a book by its ISBN number.urn:uuid:6e8bc430-9c3a-11d9-9669-0800200c9a66
a globally unique identifierurn:publishing:book
- An XML namespace that identifies the document as a type of book.URNs can identify ideas and concepts. They are not restricted to identifying documents. When a URN does represent a document, it can be translated into a URL by a "resolver". The document can then be downloaded from the URL.
Points to meta data about a document rather than to the document itself. An example of a URC is one that points to the HTML source code of a page like: view-source:http://example.com/
Rather than locating it on the internet, or naming it, data can be placed directly into a URI. An example would be data:,Hello%20World
.
The W3 spec for HTML says that the href
of an anchor tag can contain a URI, not just a URL. You should be able to put in a URN such as <a href="urn:isbn:0451450523">
. Your browser would then resolve that URN to a URL and download the book for you.
Not that I know of, but modern web browser do implement the data URI scheme.
No. Both relative and absolute URLs are URLs (and URIs.)
No. Both URLs with and without query parameters are URLs (and URIs.)
No. Both URLs with and without fragment identifiers are URLs (and URIs.)
No. URLs are defined to be a strict subset of URIs. If a parser allows a character in a URL but not in a URI, there is a bug in the parser. The specs go into great detail about which characters are allowed in which parts of URLs and URIs. Some characters may be allowed only in some parts of the URL, but characters alone are not a difference between URLs and URIs.
Yes. The W3C realized that there is a ton of confusion about this. They issued a URI clarification document that says that it is now OK to use the terms URL and URI interchangeably (to mean URI). It is no longer useful to strictly segment URIs into different types such as URL, URN, and URC.
The definition of URN is now looser than what I stated above. The latest RFC on URIs says that any URI can now be a URN (regardless of whether it starts with urn:
) as long as it has "the properties of a name." That is: It is globally unique and persistent even when the resource ceases to exist or becomes unavailable. An example: The URIs used in HTML doctypes such as http://www.w3.org/TR/html4/strict.dtd
. That URI would continue to name the HTML4 transitional doctype even if the page on the w3.org website were deleted.
This solution might be a bit complicated, but boost-range
has also some other nice things to offer.
#include <iostream>
#include <vector>
#include <boost/range/algorithm/copy.hpp>
int main(int, char**) {
std::vector<int> a = { 1,2,3 };
std::vector<int> b = { 4,5,6 };
boost::copy(b, std::back_inserter(a));
for (auto& iter : a) {
std::cout << iter << " ";
}
return EXIT_SUCCESS;
}
Often ones intention is to combine vector a
and b
just iterate over it doing some operation. In this case, there is the ridiculous simple join
function.
#include <iostream>
#include <vector>
#include <boost/range/join.hpp>
#include <boost/range/algorithm/copy.hpp>
int main(int, char**) {
std::vector<int> a = { 1,2,3 };
std::vector<int> b = { 4,5,6 };
std::vector<int> c = { 7,8,9 };
// Just creates an iterator
for (auto& iter : boost::join(a, boost::join(b, c))) {
std::cout << iter << " ";
}
std::cout << "\n";
// Can also be used to create a copy
std::vector<int> d;
boost::copy(boost::join(a, boost::join(b, c)), std::back_inserter(d));
for (auto& iter : d) {
std::cout << iter << " ";
}
return EXIT_SUCCESS;
}
For large vectors this might be an advantage, as there is no copying. It can be also used for copying an generalizes easily to more than one container.
For some reason there is nothing like boost::join(a,b,c)
, which could be reasonable.
EDIT 2020-09-21: Since 3.4.0, Mockito supports mocking static methods, API is still incubating and is likely to change, in particular around stubbing and verification. It requires the mockito-inline
artifact. And you don't need to prepare the test or use any specific runner. All you need to do is :
@Test
public void name() {
try (MockedStatic<LoggerFactory> integerMock = mockStatic(LoggerFactory.class)) {
final Logger logger = mock(Logger.class);
integerMock.when(() -> LoggerFactory.getLogger(any(Class.class))).thenReturn(logger);
new Controller().log();
verify(logger).warn(any());
}
}
The two inportant aspect in this code, is that you need to scope when the static mock applies, i.e. within this try block. And you need to call the stubbing and verification api from the MockedStatic
object.
@Mick, try to prepare the owner of the static field too, eg :
@PrepareForTest({GoodbyeController.class, LoggerFactory.class})
EDIT1 : I just crafted a small example. First the controller :
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Controller {
Logger logger = LoggerFactory.getLogger(Controller.class);
public void log() { logger.warn("yup"); }
}
Then the test :
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.verify;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.mockStatic;
import static org.powermock.api.mockito.PowerMockito.when;
@RunWith(PowerMockRunner.class)
@PrepareForTest({Controller.class, LoggerFactory.class})
public class ControllerTest {
@Test
public void name() throws Exception {
mockStatic(LoggerFactory.class);
Logger logger = mock(Logger.class);
when(LoggerFactory.getLogger(any(Class.class))).thenReturn(logger);
new Controller().log();
verify(logger).warn(anyString());
}
}
Note the imports ! Noteworthy libs in the classpath : Mockito, PowerMock, JUnit, logback-core, logback-clasic, slf4j
EDIT2 : As it seems to be a popular question, I'd like to point out that if these log messages are that important and require to be tested, i.e. they are feature / business part of the system then introducing a real dependency that make clear theses logs are features would be a so much better in the whole system design, instead of relying on static code of a standard and technical classes of a logger.
For this matter I would recommend to craft something like= a Reporter
class with methods such as reportIncorrectUseOfYAndZForActionX
or reportProgressStartedForActionX
. This would have the benefit of making the feature visible for anyone reading the code. But it will also help to achieve tests, change the implementations details of this particular feature.
Hence you wouldn't need static mocking tools like PowerMock. In my opinion static code can be fine, but as soon as the test demands to verify or to mock static behavior it is necessary to refactor and introduce clear dependencies.
I made this in my code to do that
note: I am a beginner.
It is my jsp code.
<%
java.sql.Connection Conn = DBconnector.SetDBConnection(); /* make connector as you make in your code */
Statement st = null;
ResultSet rs = null;
st = Conn.createStatement();
rs = st.executeQuery("select * from department"); %>
<tr>
<td>
Student Major : <select name ="Major">
<%while(rs.next()){ %>
<option value="<%=rs.getString(1)%>"><%=rs.getString(1)%></option>
<%}%>
</select>
</td>
One possible (and common) use is when you have some object that is not thread-safe, but you want to avoid synchronizing access to that object (I'm looking at you, SimpleDateFormat). Instead, give each thread its own instance of the object.
For example:
public class Foo
{
// SimpleDateFormat is not thread-safe, so give one to each thread
private static final ThreadLocal<SimpleDateFormat> formatter = new ThreadLocal<SimpleDateFormat>(){
@Override
protected SimpleDateFormat initialValue()
{
return new SimpleDateFormat("yyyyMMdd HHmm");
}
};
public String formatIt(Date date)
{
return formatter.get().format(date);
}
}
The following regular expression in Python works well for detecting URL(s) in the text:
source_text = '''
text1
text2
http://url.com/bla1/blah1/
text3
text4
http://url.com/bla2/blah2/
text5
text6 '''
import re
url_reg = r'[a-z]*[:.]+\S+'
result = re.sub(url_reg, '', source_text)
print(result)
Output:
text1
text2
text3
text4
text5
text6
The formula for the number of binary bits required to store n integers (for example, 0 to n - 1) is:
and round up.
For example, for values -128 to 127 (signed byte) or 0 to 255 (unsigned byte), the number of integers is 256, so n is 256, giving 8 from the above formula.
For 0 to n, use n + 1 in the above formula (there are n + 1 integers).
On your calculator, loge may just be labelled log or ln (natural logarithm).
The generic HttpRequestMessage<T>
has been removed. This :
new HttpRequestMessage<Widget>(widget)
will no longer work.
Instead, from this post, the ASP.NET team has included some new calls to support this functionality:
HttpClient.PostAsJsonAsync<T>(T value) sends “application/json”
HttpClient.PostAsXmlAsync<T>(T value) sends “application/xml”
So, the new code (from dunston) becomes:
Widget widget = new Widget()
widget.Name = "test"
widget.Price = 1;
HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:44268");
client.PostAsJsonAsync("api/test", widget)
.ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode() );
apparently this problem got solved just by increasing queue size on my 3rd party smtp server. but the answer by Nip sounds like it is fairly usefull too
In your generic method, T
is just a placeholder for a type. However, the compiler doesn't per se know anything about the concrete type(s) being used runtime, so it can't assume that they will have a var
member.
The usual way to circumvent this is to add a generic type constraint to your method declaration to ensure that the types used implement a specific interface (in your case, it could be ITest
):
public void PrintGeneric<T>(T test) where T : ITest
Then, the members of that interface would be directly available inside the method. However, your ITest
is currently empty, you need to declare common stuff there in order to enable its usage within the method.
Swift 2.0 solution is here:
let urlStr = “http://url_to_manage_post_requests”
let url = NSURL(string: urlStr)
let request: NSMutableURLRequest =
NSMutableURLRequest(URL: url!) request.HTTPMethod = "POST"
request.setValue(“application/json” forHTTPHeaderField:”Content-Type”)
request.timeoutInterval = 60.0
//additional headers
request.setValue(“deviceIDValue”, forHTTPHeaderField:”DeviceId”)
let bodyStr = “string or data to add to body of request”
let bodyData = bodyStr.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
request.HTTPBody = bodyData
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request){
(data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in
if let httpResponse = response as? NSHTTPURLResponse {
print("responseCode \(httpResponse.statusCode)")
}
if error != nil {
// You can handle error response here
print("\(error)")
}else {
//Converting response to collection formate (array or dictionary)
do{
let jsonResult: AnyObject = (try NSJSONSerialization.JSONObjectWithData(data!, options:
NSJSONReadingOptions.MutableContainers))
//success code
}catch{
//failure code
}
}
}
task.resume()
It is worth mentioning that while starting the keys with numbers is valid, it could cause some unintended issues.
Example:
var testObject = {
"1tile": "test value"
};
console.log(testObject.1tile); // fails, invalid syntax
console.log(testObject["1tile"]; // workaround
According to a slideshow about Facebook's Messaging system, Facebook uses the comet technology to "push" message to web browsers. Facebook's comet server is built on the open sourced Erlang web server mochiweb.
In the picture below, the phrase "channel clusters" means "comet servers".
Many other big web sites build their own comet server, because there are differences between every company's need. But build your own comet server on a open source comet server is a good approach.
You can try icomet, a C1000K C++ comet server built with libevent. icomet also provides a JavaScript library, it is easy to use as simple as:
var comet = new iComet({
sign_url: 'http://' + app_host + '/sign?obj=' + obj,
sub_url: 'http://' + icomet_host + '/sub',
callback: function(msg){
// on server push
alert(msg.content);
}
});
icomet supports a wide range of Browsers and OSes, including Safari(iOS, Mac), IEs(Windows), Firefox, Chrome, etc.
This simple solution posted here Force page refresh on back button worked ...
I've tried to force a page to be downloaded again by browser when user clicks back button, but nothing worked. I appears that modern browsers have separate cache for pages, which stores complete state of a page (including JavaScript generated DOM elements), so when users presses back button, previous page is shown instantly in state the user has left it. If you want to force browser to reload page on back button, add onunload="" to your (X)HTML body element:
<body onunload="">
This disables special cache and forces page reload when user presses back button. Think twice before you use it. Fact of needing such solution is a hint your site navigation concept is flawed.
HTML5 has included a much better solution than using hashchange which is the HTML5 State Management APIs - https://developer.mozilla.org/en/DOM/Manipulating_the_browser_history - they allow you to change the url of the page, without needing to use hashes!
Though the HTML5 State Functionality is only available to HTML5 Browsers. So you probably want to use something like History.js which provides a backwards compatible experience to HTML4 Browsers (via hashes, but still supports data and titles as well as the replaceState functionality).
You can read more about it here: https://github.com/browserstate/History.js
The problem is that flex: 1
sets flex-basis: 0
. Instead, you need
.container .box {
min-width: 200px;
max-width: 400px;
flex-basis: auto; /* default value */
flex-grow: 1;
}
.container {_x000D_
display: -webkit-flex;_x000D_
display: flex;_x000D_
-webkit-flex-wrap: wrap;_x000D_
flex-wrap: wrap;_x000D_
}_x000D_
_x000D_
.container .box {_x000D_
-webkit-flex-grow: 1;_x000D_
flex-grow: 1;_x000D_
min-width: 100px;_x000D_
max-width: 400px;_x000D_
height: 200px;_x000D_
background-color: #fafa00;_x000D_
overflow: hidden;_x000D_
}
_x000D_
<div class="container">_x000D_
<div class="box">_x000D_
<table>_x000D_
<tr>_x000D_
<td>Content</td>_x000D_
<td>Content</td>_x000D_
<td>Content</td>_x000D_
</tr>_x000D_
</table> _x000D_
</div>_x000D_
<div class="box">_x000D_
<table>_x000D_
<tr>_x000D_
<td>Content</td>_x000D_
</tr>_x000D_
</table> _x000D_
</div>_x000D_
<div class="box">_x000D_
<table>_x000D_
<tr>_x000D_
<td>Content</td>_x000D_
<td>Content</td>_x000D_
</tr>_x000D_
</table> _x000D_
</div>_x000D_
</div>
_x000D_
The API docs give some good hints:
print() ? nil
print(obj, ...) ? nil
Writes the given object(s) to ios. Returns
nil
.The stream must be opened for writing. Each given object that isn't a string will be converted by calling its
to_s
method. When called without arguments, prints the contents of$_
.If the output field separator (
$,
) is notnil
, it is inserted between objects. If the output record separator ($\
) is notnil
, it is appended to the output....
puts(obj, ...) ? nil
Writes the given object(s) to ios. Writes a newline after any that do not already end with a newline sequence. Returns
nil
.The stream must be opened for writing. If called with an array argument, writes each element on a new line. Each given object that isn't a string or array will be converted by calling its
to_s
method. If called without arguments, outputs a single newline.
Experimenting a little with the points given above, the differences seem to be:
Called with multiple arguments, print
separates them by the 'output field separator' $,
(which defaults to nothing) while puts
separates them by newlines. puts
also puts a newline after the final argument, while print
does not.
2.1.3 :001 > print 'hello', 'world'
helloworld => nil
2.1.3 :002 > puts 'hello', 'world'
hello
world
=> nil
2.1.3 :003 > $, = 'fanodd'
=> "fanodd"
2.1.3 :004 > print 'hello', 'world'
hellofanoddworld => nil
2.1.3 :005 > puts 'hello', 'world'
hello
world
=> nil
puts
automatically unpacks arrays, while print
does not:
2.1.3 :001 > print [1, [2, 3]], [4] [1, [2, 3]][4] => nil 2.1.3 :002 > puts [1, [2, 3]], [4] 1 2 3 4 => nil
print
with no arguments prints $_
(the last thing read by gets
), while puts
prints a newline:
2.1.3 :001 > gets
hello world
=> "hello world\n"
2.1.3 :002 > puts
=> nil
2.1.3 :003 > print
hello world
=> nil
print
writes the output record separator $\
after whatever it prints, while puts
ignores this variable:
mark@lunchbox:~$ irb
2.1.3 :001 > $\ = 'MOOOOOOO!'
=> "MOOOOOOO!"
2.1.3 :002 > puts "Oink! Baa! Cluck! "
Oink! Baa! Cluck!
=> nil
2.1.3 :003 > print "Oink! Baa! Cluck! "
Oink! Baa! Cluck! MOOOOOOO! => nil
If the main problem is the loss of precision when converting from a float to a string, one possible way to go is to convert the floats to the decimal
S: http://docs.python.org/library/decimal.html.
In python 2.7 and higher you can directly convert a float to a decimal
object.
A better way in long run is to integrate Gradle in your project environment. Its a build tool for Java, and now being used a lot in the android development space.
You will need to make a .gradle file and list your library dependencies. Then, all you would need to do is import the project in IntelliJ using Gradle.
Cheers
I worked on this same issue and I am sure I have found out the exact reason for it.
Neither BindingResult nor plain target object for bean name 'command' available as request attribute
If your successView property value (name of jsp page) is the same as your input page name, then second value of ModelAndView constructor must be match with the commandName of the input page.
E.g.
index.jsp
<html>
<body>
<table>
<tr><td><a href="Login.html">Login</a></td></tr>
</table>
</body>
</html>
dispatcher-servlet.xml
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="urlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="urlMap">
<map>
<entry key="/Login.html">
<ref bean="userController"/>
</entry>
</map>
</property>
</bean>
<bean id="userController" class="controller.AddCountryFormController">
<property name="commandName"><value>country</value></property>
<property name="commandClass"><value>controller.Country</value></property>
<property name="formView"><value>countryForm</value></property>
<property name="successView"><value>countryForm</value></property>
</bean>
AddCountryFormController.java
package controller;
import javax.servlet.http.*;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.mvc.SimpleFormController;
public class AddCountryFormController extends SimpleFormController
{
public AddCountryFormController(){
setCommandName("Country.class");
}
protected ModelAndView onSubmit(HttpServletRequest request,HttpServletResponse response,Object command,BindException errors){
Country country=(Country)command;
System.out.println("calling onsubmit method !!!!!");
return new ModelAndView(getSuccessView(),"country",country);
}
}
Country.java
package controller;
public class Country
{
private String countryName;
public void setCountryName(String value){
countryName=value;
}
public String getCountryName(){
return countryName;
}
}
countryForm.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<body>
<form:form commandName="country" method="POST" >
<table>
<tr><td><form:input path="countryName"/></td></tr>
<tr><td><input type="submit" value="Save"/></td></tr>
</table>
</form:form>
</body>
<html>
Input page commandName="country"
ModelAndView Constructor as return new ModelAndView(getSuccessView(),"country",country);
Means inputpage commandName==ModeAndView(,"commandName",)
I am talking here from a theoretical point of view; I have not tried BitLocker.
BitLocker uses AES encryption with a 128-bit key. On a Core2 machine, clocked at 2.53 GHz, encryption speed should be about 110 MB/s, using one core. The two cores could process about 220 MB/s, assuming perfect data transfer and core synchronization with no overhead, and that nothing requires the CPU in the same time (that one hell of an assumption, actually). The X25-M G2 is announced at 250 MB/s read bandwidth (that's what the specs say), so, in "ideal" conditions, BitLocker necessarily involves a bit of a slowdown.
However read bandwidth is not that important. It matters when you copy huge files, which is not something that you do very often. In everyday work, access time is much more important: as a developer, you create, write, read and delete many files, but they are all small (most of them are much smaller than one megabyte). This is what makes SSD "snappy". Encryption does not impact access time. So my guess is that any performance degradation will be negligible(*).
(*) Here I assume that Microsoft's developers did their job properly.
There should be three pages here:
I don't see this short, linear flow being sufficiently complex to warrant using Spring Web Flow.
I would just use straight Spring Web MVC for steps 1 and 2. I wouldn't use Spring Security for the initial login form, because Spring Security's login form expects a password and a login processing URL. Similarly, Spring Security doesn't provide special support for CAPTCHAs or security questions, so you can just use Spring Web MVC once again.
You can handle step 3 using Spring Security, since now you have a username and a password. The form login page should display the security image, and it should include the user-provided username as a hidden form field to make Spring Security happy when the user submits the login form. The only way to get to step 3 is to have a successful POST
submission on step 1 (and 2 if applicable).
Use variables i.e. the .BAT
variables and called %0
to %9
There is no "better" but the more common one is ||
. They have different precedence and ||
would work like one would expect normally.
See also: Logical operators (the following example is taken from there):
// The result of the expression (false || true) is assigned to $e
// Acts like: ($e = (false || true))
$e = false || true;
// The constant false is assigned to $f and then true is ignored
// Acts like: (($f = false) or true)
$f = false or true;
From the StringBuilder Class documentation:
The String object is immutable. Every time you use one of the methods in the System.String class, you create a new string object in memory, which requires a new allocation of space for that new object. In situations where you need to perform repeated modifications to a string, the overhead associated with creating a new String object can be costly. The System.Text.StringBuilder class can be used when you want to modify a string without creating a new object. For example, using the StringBuilder class can boost performance when concatenating many strings together in a loop.
You need to prevent the default behaviour. You can either use e.preventDefault()
or return false;
In this case, the best thing is, you can use return false;
here:
<form onsubmit="completeAndRedirect(); return false;">
You must use CSS. Can't be done with PHP.
Increased cohesion and decreased coupling do lead to good software design.
Cohesion partitions your functionality so that it is concise and closest to the data relevant to it, whilst decoupling ensures that the functional implementation is isolated from the rest of the system.
Decoupling allows you to change the implementation without affecting other parts of your software.
Cohesion ensures that the implementation more specific to functionality and at the same time easier to maintain.
The most effective method of decreasing coupling and increasing cohesion is design by interface.
That is major functional objects should only 'know' each other through the interface(s) that they implement. The implementation of an interface introduces cohesion as a natural consequence.
Whilst not realistic in some senarios it should be a design goal to work by.
Example (very sketchy):
public interface IStackoverFlowQuestion
void SetAnswered(IUserProfile user);
void VoteUp(IUserProfile user);
void VoteDown(IUserProfile user);
}
public class NormalQuestion implements IStackoverflowQuestion {
protected Integer vote_ = new Integer(0);
protected IUserProfile user_ = null;
protected IUserProfile answered_ = null;
public void VoteUp(IUserProfile user) {
vote_++;
// code to ... add to user profile
}
public void VoteDown(IUserProfile user) {
decrement and update profile
}
public SetAnswered(IUserProfile answer) {
answered_ = answer
// update u
}
}
public class CommunityWikiQuestion implements IStackoverflowQuestion {
public void VoteUp(IUserProfile user) { // do not update profile }
public void VoteDown(IUserProfile user) { // do not update profile }
public void SetAnswered(IUserProfile user) { // do not update profile }
}
Some where else in your codebase you could have a module that processes questions regardless of what they are:
public class OtherModuleProcessor {
public void Process(List<IStackoverflowQuestion> questions) {
... process each question.
}
}
if it's inside the transaction, the database locking system will take care of concurrency issues. of course, if you use one (the mssql default is that it uses lock, so it states if you don't override that)
This meta tag is used by all responsive web pages, that is those that are designed to layout well across device types - phone, tablet, and desktop. The attributes do what they say. However, as MDN's Using the viewport meta tag to control layout on mobile browsers indicates,
On high dpi screens, pages with
initial-scale=1
will effectively be zoomed by browsers.
I've found that the following ensures that the page displays with zero zoom by default.
<meta name="viewport" content="width=device-width, initial-scale=0.86, maximum-scale=3.0, minimum-scale=0.86">
def wordCount(mystring):
tempcount = 0
count = 1
try:
for character in mystring:
if character == " ":
tempcount +=1
if tempcount ==1:
count +=1
else:
tempcount +=1
else:
tempcount=0
return count
except Exception:
error = "Not a string"
return error
mystring = "I am having a very nice 23!@$ day."
print(wordCount(mystring))
output is 8
I can't comment on @omega's comment because I don't have enough reputation but the answer to that question should be something like:
shake.xml
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="100" <!-- how long the animation lasts -->
android:fromDegrees="-5" <!-- how far to swing left -->
android:pivotX="50%" <!-- pivot from horizontal center -->
android:pivotY="50%" <!-- pivot from vertical center -->
android:repeatCount="10" <!-- how many times to swing back and forth -->
android:repeatMode="reverse" <!-- to make the animation go the other way -->
android:toDegrees="5" /> <!-- how far to swing right -->
Class.java
Animation shake = AnimationUtils.loadAnimation(this, R.anim.shake);
view.startAnimation(shake);
This is just one way of doing what you want, there may be better methods out there.
Assuming your "states" collection is like:
{"name" : "Spain", "cities" : [ { "name" : "Madrid" }, { "name" : null } ] }
{"name" : "France" }
The query to find states with null cities would be:
db.states.find({"cities.name" : {"$eq" : null, "$exists" : true}});
It is a common mistake to query for nulls as:
db.states.find({"cities.name" : null});
because this query will return all documents lacking the key (in our example it will return Spain and France). So, unless you are sure the key is always present you must check that the key exists as in the first query.
The compiler needs to know the size of the second dimension in your two dimensional array. For example:
void print_graph(g_node graph_node[], double weight[][5], int nodes);
This link helped me boost npm installs. Force npm to use http over https and disable progress display.
- (NSInteger)tableView:(UITableView *)theTableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)theTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"HistoryCell";
UITableViewCell *cell = (UITableViewCell *)[theTableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
cell.descriptionLabel.text = @"Testing";
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//Code for selection.
}
these are UITableView delegate methods.
Multi dimensional array to single array with one line code !!! Enjoy the code.
$array=[1=>[2,5=>[4,2],[7,8=>[3,6]],5],4];
$arr=[];
array_walk_recursive($array, function($k){global $arr; $arr[]=$k;});
print_r($arr);
...Enjoy the code.
Change your client application to 4.5 and above. IF you are 4.5 then use : System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12 / Tls1.1 / Tls1.0 as needed or you can upgrade your application to above 4.6.1.
You can access the id after calling the persist method of the entity manager.
$widgetEntity = new WidgetEntity();
$entityManager->persist($widgetEntity);
$entityManager->flush();
$widgetEntity->getId();
You do need to flush in order to get this id.
Syntax Error Fix: Added semi-colon after $entityManager->flush() is called.
The spec files are unit tests for your source files. The convention for Angular applications is to have a .spec.ts file for each .ts file. They are run using the Jasmine javascript test framework through the Karma test runner (https://karma-runner.github.io/) when you use the ng test
command.
You can use this for some further reading:
Because you did not post the csrfmiddlewaretoken, so Django forbid you. this document can help you.
The best way to get good control over the colorbar position is to give it its own axis. Like so:
# What I imagine your plotting looks like so far
fig = plt.figure()
ax1 = fig.add_subplot(111)
ax1.plot(your_data)
# Now adding the colorbar
cbaxes = fig.add_axes([0.8, 0.1, 0.03, 0.8])
cb = plt.colorbar(ax1, cax = cbaxes)
The numbers in the square brackets of add_axes refer to [left, bottom, width, height], where the coordinates are just fractions that go from 0 to 1 of the plotting area.
Adapting paxdiablo's solution, I run on the 28th and 29th of February. The data from the 29th overwrites the 28th.
# min hr date month dow
55 23 31 1,3,5,7,8,10,12 * /path/monthly_copy_data.sh
55 23 30 4,6,9,11 * /path/monthly_copy_data.sh
55 23 28,29 2 * /path/monthly_copy_data.sh
Instead of loading a gigantic log file in an editor, I'm using Unix command line tools like grep
, tail
, gawk
, etc. to filter the interesting parts into a much smaller file and then, I open that.
On Windows, try Cygwin.
you can use row() instead of result().
$this->db->where('id', '3');
$q = $this->db->get('my_users_table')->row();
Just use readLines
on your file:
R> res <- readLines(system.file("DESCRIPTION", package="MASS"))
R> length(res)
[1] 27
R> res
[1] "Package: MASS"
[2] "Priority: recommended"
[3] "Version: 7.3-18"
[4] "Date: 2012-05-28"
[5] "Revision: $Rev: 3167 $"
[6] "Depends: R (>= 2.14.0), grDevices, graphics, stats, utils"
[7] "Suggests: lattice, nlme, nnet, survival"
[8] "Authors@R: c(person(\"Brian\", \"Ripley\", role = c(\"aut\", \"cre\", \"cph\"),"
[9] " email = \"[email protected]\"), person(\"Kurt\", \"Hornik\", role"
[10] " = \"trl\", comment = \"partial port ca 1998\"), person(\"Albrecht\","
[11] " \"Gebhardt\", role = \"trl\", comment = \"partial port ca 1998\"),"
[12] " person(\"David\", \"Firth\", role = \"ctb\"))"
[13] "Description: Functions and datasets to support Venables and Ripley,"
[14] " 'Modern Applied Statistics with S' (4th edition, 2002)."
[15] "Title: Support Functions and Datasets for Venables and Ripley's MASS"
[16] "License: GPL-2 | GPL-3"
[17] "URL: http://www.stats.ox.ac.uk/pub/MASS4/"
[18] "LazyData: yes"
[19] "Packaged: 2012-05-28 08:47:38 UTC; ripley"
[20] "Author: Brian Ripley [aut, cre, cph], Kurt Hornik [trl] (partial port"
[21] " ca 1998), Albrecht Gebhardt [trl] (partial port ca 1998), David"
[22] " Firth [ctb]"
[23] "Maintainer: Brian Ripley <[email protected]>"
[24] "Repository: CRAN"
[25] "Date/Publication: 2012-05-28 08:53:03"
[26] "Built: R 2.15.1; x86_64-pc-mingw32; 2012-06-22 14:16:09 UTC; windows"
[27] "Archs: i386, x64"
R>
There is an entire manual devoted to this...
You can use deparse
and substitute
to get the name of a function argument:
myfunc <- function(v1) {
deparse(substitute(v1))
}
myfunc(foo)
[1] "foo"
To check whether a process/command returned 0 or not, use the operators && == 0 or
: not == 0 ||
Just add operator to your script:
execute_command && (
echo\Return 0, with no execution error
) || (
echo\Return non 0, something went wrong
)
command && echo\Return 0 || echo\Return non 0
Include the jQuery file first:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript" src="./javascript.js"></script>
<script
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCJnj2nWoM86eU8Bq2G4lSNz3udIkZT4YY&sensor=false">
</script>
Both choices refer to what algorithm the identity provider uses to sign the JWT. Signing is a cryptographic operation that generates a "signature" (part of the JWT) that the recipient of the token can validate to ensure that the token has not been tampered with.
RS256 (RSA Signature with SHA-256) is an asymmetric algorithm, and it uses a public/private key pair: the identity provider has a private (secret) key used to generate the signature, and the consumer of the JWT gets a public key to validate the signature. Since the public key, as opposed to the private key, doesn't need to be kept secured, most identity providers make it easily available for consumers to obtain and use (usually through a metadata URL).
HS256 (HMAC with SHA-256), on the other hand, involves a combination of a hashing function and one (secret) key that is shared between the two parties used to generate the hash that will serve as the signature. Since the same key is used both to generate the signature and to validate it, care must be taken to ensure that the key is not compromised.
If you will be developing the application consuming the JWTs, you can safely use HS256, because you will have control on who uses the secret keys. If, on the other hand, you don't have control over the client, or you have no way of securing a secret key, RS256 will be a better fit, since the consumer only needs to know the public (shared) key.
Since the public key is usually made available from metadata endpoints, clients can be programmed to retrieve the public key automatically. If this is the case (as it is with the .Net Core libraries), you will have less work to do on configuration (the libraries will fetch the public key from the server). Symmetric keys, on the other hand, need to be exchanged out of band (ensuring a secure communication channel), and manually updated if there is a signing key rollover.
Auth0 provides metadata endpoints for the OIDC, SAML and WS-Fed protocols, where the public keys can be retrieved. You can see those endpoints under the "Advanced Settings" of a client.
The OIDC metadata endpoint, for example, takes the form of https://{account domain}/.well-known/openid-configuration
. If you browse to that URL, you will see a JSON object with a reference to https://{account domain}/.well-known/jwks.json
, which contains the public key (or keys) of the account.
If you look at the RS256 samples, you will see that you don't need to configure the public key anywhere: it's retrieved automatically by the framework.
Press ctrl
+ -
to decrease, and ctrl
+ +
to increase the Font Size.
It's working for me in Eclipse Oxygen.
finish your current_activity using method finish() onBack method of your current_activity
and then add below lines in onDestroy of the current_activity for Removing Force close
@Override
public void onDestroy()
{
android.os.Process.killProcess(android.os.Process.myPid());
super.onDestroy();
}
This is too late but I'm giving an example. Imagine you have a Vector
class and a Point
class. Both take x, y
as positional args. Let's imagine you want to create a function that moves the point to be put on the vector.
put_point_on_vec(point, vec)
Make it a method on the vector class. e.g my_vec.put_point(point)
Point
class. my_point.put_on_vec(vec)
Vector
implements __call__
, So you can use it like my_vec_instance(point)
This is actually part of some examples I'm working on for a guide for dunder methods explained with Maths that I'm gonna release sooner or later.
I left the logic of moving the point itself because this is not what this question is about
Now we can do this with:
<style type="text/css" media="print">
@page {
size: auto; /* auto is the initial value */
margin: 0; /* this affects the margin in the printer settings */
}
</style>
RAII is usually better, but you can have easily the finally semantics in C++. Using a tiny amount of code.
Besides, the C++ Core Guidelines give finally.
Here is a link to the GSL Microsoft implementation and a link to the Martin Moene implementation
Bjarne Stroustrup multiple times said that everything that is in the GSL it meant to go in the standard eventually. So it should be a future-proof way to use finally.
You can easily implement yourself if you want though, continue reading.
In C++11 RAII and lambdas allows to make a general finally:
namespace detail { //adapt to your "private" namespace
template <typename F>
struct FinalAction {
FinalAction(F f) : clean_{f} {}
~FinalAction() { if(enabled_) clean_(); }
void disable() { enabled_ = false; };
private:
F clean_;
bool enabled_{true}; }; }
template <typename F>
detail::FinalAction<F> finally(F f) {
return detail::FinalAction<F>(f); }
example of use:
#include <iostream>
int main() {
int* a = new int;
auto delete_a = finally([a] { delete a; std::cout << "leaving the block, deleting a!\n"; });
std::cout << "doing something ...\n"; }
the output will be:
doing something...
leaving the block, deleting a!
Personally I used this few times to ensure to close POSIX file descriptor in a C++ program.
Having a real class that manage resources and so avoids any kind of leaks is usually better, but this finally is useful in the cases where making a class sounds like an overkill.
Besides, I like it better than other languages finally because if used naturally you write the closing code nearby the opening code (in my example the new and delete) and destruction follows construction in LIFO order as usual in C++. The only downside is that you get an auto variable you don't really use and the lambda syntax make it a little noisy (in my example in the fourth line only the word finally and the {}-block on the right are meaningful, the rest is essentially noise).
Another example:
[...]
auto precision = std::cout.precision();
auto set_precision_back = finally( [precision, &std::cout]() { std::cout << std::setprecision(precision); } );
std::cout << std::setprecision(3);
The disable member is useful if the finally has to be called only in case of failure. For example, you have to copy an object in three different containers, you can setup the finally to undo each copy and disable after all copies are successful. Doing so, if the destruction cannot throw, you ensure the strong guarantee.
disable example:
//strong guarantee
void copy_to_all(BIGobj const& a) {
first_.push_back(a);
auto undo_first_push = finally([first_&] { first_.pop_back(); });
second_.push_back(a);
auto undo_second_push = finally([second_&] { second_.pop_back(); });
third_.push_back(a);
//no necessary, put just to make easier to add containers in the future
auto undo_third_push = finally([third_&] { third_.pop_back(); });
undo_first_push.disable();
undo_second_push.disable();
undo_third_push.disable(); }
If you cannot use C++11 you can still have finally, but the code becomes a bit more long winded. Just define a struct with only a constructor and destructor, the constructor take references to anything needed and the destructor does the actions you need. This is basically what the lambda does, done manually.
#include <iostream>
int main() {
int* a = new int;
struct Delete_a_t {
Delete_a_t(int* p) : p_(p) {}
~Delete_a_t() { delete p_; std::cout << "leaving the block, deleting a!\n"; }
int* p_;
} delete_a(a);
std::cout << "doing something ...\n"; }
Hopefully you can use C++11, this code is more to show how the "C++ does not support finally" has been nonsense since the very first weeks of C++, it was possible to write this kind of code even before C++ got its name.
I've seen this happen a few times on my HTC Desire. I've never figured out whether the problem is in adb or the device but I usually do the following:
99% of my issues have been resolved with these steps.
Correct Code is
class A
{
public:
explicit A(int x) {}
};
class B: public A
{
public:
B(int a):A(a){
}
};
main()
{
B *b = new B(5);
delete b;
}
Error is b/c Class B has not parameter constructor and second it should have base class initializer to call the constructor of Base Class parameter constructor
Here is an example that's working for me with MVC and Javascript in the Razor. The first function calls an action via ajax on my controller and passes two parameters.
function redirectToAction(var1, var2)
{
try{
var url = '../actionnameinsamecontroller/' + routeId;
$.ajax({
type: "GET",
url: url,
data: { param1: var1, param2: var2 },
dataType: 'html',
success: function(){
},
error: function(xhr, ajaxOptions, thrownError){
alert(error);
}
});
}
catch(err)
{
alert(err.message);
}
}
Use the ajaxStart to start your progress bar code.
$(document).ajaxStart(function(){
try
{
// showing a modal
$("#progressDialog").modal();
var i = 0;
var timeout = 750;
(function progressbar()
{
i++;
if(i < 1000)
{
// some code to make the progress bar move in a loop with a timeout to
// control the speed of the bar
iterateProgressBar();
setTimeout(progressbar, timeout);
}
}
)();
}
catch(err)
{
alert(err.message);
}
});
When the process completes close the progress bar
$(document).ajaxStop(function(){
// hide the progress bar
$("#progressDialog").modal('hide');
});
I encountered a similar problem and to overcome it, I implemented the code below in styles, i.e res->values->styles->resource tag
<item name="android:windowDisablePreview">true</item>
Here is the whole code:
<style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowDisablePreview">true</item>
</style>
There seems to be an issue with the version "node-sass": "4.5.3"
, try updating to the latest version. Such as you could try adding ^
"node-sass": "^4.5.3"
for the latest version
The problem is that omega
in your case is matrix
of dimensions 1 * 1
. You should convert it to a vector if you wish to multiply t(X) %*% X
by a scalar (that is omega
)
In particular, you'll have to replace this line:
omega = rgamma(1,a0,1) / L0
with:
omega = as.vector(rgamma(1,a0,1) / L0)
everywhere in your code. It happens in two places (once inside the loop and once outside). You can substitute as.vector(.)
or c(t(.))
. Both are equivalent.
Here's the modified code that should work:
gibbs = function(data, m01 = 0, m02 = 0, k01 = 0.1, k02 = 0.1,
a0 = 0.1, L0 = 0.1, nburn = 0, ndraw = 5000) {
m0 = c(m01, m02)
C0 = matrix(nrow = 2, ncol = 2)
C0[1,1] = 1 / k01
C0[1,2] = 0
C0[2,1] = 0
C0[2,2] = 1 / k02
beta = mvrnorm(1,m0,C0)
omega = as.vector(rgamma(1,a0,1) / L0)
draws = matrix(ncol = 3,nrow = ndraw)
it = -nburn
while (it < ndraw) {
it = it + 1
C1 = solve(solve(C0) + omega * t(X) %*% X)
m1 = C1 %*% (solve(C0) %*% m0 + omega * t(X) %*% y)
beta = mvrnorm(1, m1, C1)
a1 = a0 + n / 2
L1 = L0 + t(y - X %*% beta) %*% (y - X %*% beta) / 2
omega = as.vector(rgamma(1, a1, 1) / L1)
if (it > 0) {
draws[it,1] = beta[1]
draws[it,2] = beta[2]
draws[it,3] = omega
}
}
return(draws)
}
To me, it is better to put the transition codes with the original/minimum selectors than with the :hover or any other additional selectors:
#content #nav a {_x000D_
background-color: #FF0;_x000D_
_x000D_
-webkit-transition: background-color 1000ms linear;_x000D_
-moz-transition: background-color 1000ms linear;_x000D_
-o-transition: background-color 1000ms linear;_x000D_
-ms-transition: background-color 1000ms linear;_x000D_
transition: background-color 1000ms linear;_x000D_
}_x000D_
_x000D_
#content #nav a:hover {_x000D_
background-color: #AD310B;_x000D_
}
_x000D_
<div id="content">_x000D_
<div id="nav">_x000D_
<a href="#link1">Link 1</a>_x000D_
</div>_x000D_
</div>
_x000D_
The index method of a list will do this for you. If you want to guarantee order, sort the list first using sorted()
. Sorted accepts a cmp or key parameter to dictate how the sorting will happen:
a = [5, 4, 3]
print sorted(a).index(5)
Or:
a = ['one', 'aardvark', 'a']
print sorted(a, key=len).index('a')
For SQL Server 2012, or later, an easier solution is to use FORMAT ()
Documentation.
EG:
SELECT Format(1234567.8, '##,##0')
Results in: 1,234,568
The problem occurs when your custom class has for property some other class e.g. "Bitmap". What I made is to change the property field from "private Bitmap photo" to "private transient Bitmap photo". However the image is empty after I getIntent() in the receiver activity. Because of this I passed the custom class to the intent and also I've created a byte array from the image and pass it separatly to the intent:
selectedItem is my custom object and getPlacePhoto is his method to get image. I've already set it before and now I just get it first than convert it and pass it separatly:
Bitmap image = selectedItem.getPlacePhoto();
image.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
Intent intent = new Intent(YourPresentActivity.this,
TheReceiverActivity.class);
intent.putExtra("selectedItem", selectedItem);
intent.putExtra("image", byteArray);
startActivity(intent);
`
Then in the receiver activity I get my object and the image as byte array, decode the image and set it to my object as photo property.
Intent intent = getIntent();
selectedItem = (ListItem) intent.getSerializableExtra("selectedItem");
byte[] byteArray = getIntent().getByteArrayExtra("image");
Bitmap image = BitmapFactory.decodeByteArray(byteArray, 0,
byteArray.length);
selectedItem.setPhoto(image);
Just use Python's standard string formatting methods:
>>> "{0:.2}".format(1.234232)
'1.2'
>>> "{0:.3}".format(1.234232)
'1.23'
If you are using a Python version under 2.6, use
>>> "%f" % 1.32423
'1.324230'
>>> "%.2f" % 1.32423
'1.32'
>>> "%d" % 1.32423
'1'
I tried ComboBox1_KeyPress but it allows to delete the character & you can also use copy paste command. My DropDownStyle is set to DropDownList but still no use. So I did below step to avoid combobox text editing.
Below code handles delete & backspace key. And also disables combination with control key (e.g. ctr+C or ctr+X)
Private Sub CmbxInType_KeyDown(sender As Object, e As KeyEventArgs) Handles CmbxInType.KeyDown
If e.KeyCode = Keys.Delete Or e.KeyCode = Keys.Back Then
e.SuppressKeyPress = True
End If
If Not (e.Control AndAlso e.KeyCode = Keys.C) Then
e.SuppressKeyPress = True
End If
End Sub
In form load use below line to disable right click on combobox control to avoid cut/paste via mouse click.
CmbxInType.ContextMenu = new ContextMenu()
If you look at the docs for bytes
, it points you to bytearray
:
bytearray([source[, encoding[, errors]]])
Return a new array of bytes. The bytearray type is a mutable sequence of integers in the range 0 <= x < 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence Types, as well as most methods that the bytes type has, see Bytes and Byte Array Methods.
The optional source parameter can be used to initialize the array in a few different ways:
If it is a string, you must also give the encoding (and optionally, errors) parameters; bytearray() then converts the string to bytes using str.encode().
If it is an integer, the array will have that size and will be initialized with null bytes.
If it is an object conforming to the buffer interface, a read-only buffer of the object will be used to initialize the bytes array.
If it is an iterable, it must be an iterable of integers in the range 0 <= x < 256, which are used as the initial contents of the array.
Without an argument, an array of size 0 is created.
So bytes
can do much more than just encode a string. It's Pythonic that it would allow you to call the constructor with any type of source parameter that makes sense.
For encoding a string, I think that some_string.encode(encoding)
is more Pythonic than using the constructor, because it is the most self documenting -- "take this string and encode it with this encoding" is clearer than bytes(some_string, encoding)
-- there is no explicit verb when you use the constructor.
Edit: I checked the Python source. If you pass a unicode string to bytes
using CPython, it calls PyUnicode_AsEncodedString, which is the implementation of encode
; so you're just skipping a level of indirection if you call encode
yourself.
Also, see Serdalis' comment -- unicode_string.encode(encoding)
is also more Pythonic because its inverse is byte_string.decode(encoding)
and symmetry is nice.
Here is a Swift 3 version of Anth0's answer. I'm posting it here to help any swift developers in wanting to take advantage of his great answer! I took the liberty of adding a return key type of "Next" when you set the associated object.
extension UITextField {
@nonobjc static var NextHashKey: UniChar = 0
var nextTextField: UITextField? {
get {
return objc_getAssociatedObject(self,
&UITextField.NextHashKey) as? UITextField
}
set(next) {
self.returnKeyType = UIReturnKeyType.next
objc_setAssociatedObject(self,
&UITextField.NextHashKey,next,.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
}
Here is another extension that shows a possibility of using the above code to cycle through a list of UITextFields.
extension UIViewController: UITextFieldDelegate {
public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
guard let next = textField.nextTextField else {
textField.resignFirstResponder()
return true
}
next.becomeFirstResponder()
return false
}
}
And then in your ViewController or wherever, you can setup your textfields like so...
@IBOutlet fileprivate weak var textfield1: UITextField!
@IBOutlet fileprivate weak var textfield2: UITextField!
@IBOutlet fileprivate weak var textfield3: UITextField!
...
[textfield1, textfield2, textfield3].forEach{ $0?.delegate = self }
textfield1.nextTextField = textfield2
textfield2.nextTextField = textfield3
// We don't assign a nextTextField to textfield3 because we want
// textfield3 to be the last one and resignFirstResponder when
// the return button on the soft keyboard is tapped.
To build a .tar.gz
(aka .tgz
) for an entire directory tree:
import tarfile
import os.path
def make_tarfile(output_filename, source_dir):
with tarfile.open(output_filename, "w:gz") as tar:
tar.add(source_dir, arcname=os.path.basename(source_dir))
This will create a gzipped tar archive containing a single top-level folder with the same name and contents as source_dir
.
Example: Display different output depending on whether the user is logged in or not.
<?php
if ( is_user_logged_in() ) {
echo 'Welcome, registered user!';
} else {
echo 'Welcome, visitor!';
}
?>
This code for those who are experiencing the same problem trying to accessing the camera could be written with a safety check.
if ret is True:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
else:
continue
OR in case you want to close the camera/ discontinue if there will be some problem with the frame itself
if ret is True:
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
else:
break
For reference https://github.com/HackerShackOfficial/AI-Smart-Mirror/issues/36
Primary autoincrement keys in database are used to uniquely identify a given row and shouldn't be given any business meaning. So leave the primary key as is and add another column called for example courseOrder
. Then when you delete a record from the database you may want to send an additional UPDATE statement in order to decrement the courseOrder
column of all rows that have courseOrder
greater than the one you are currently deleting.
As a side note you should never modify the value of a primary key in a relational database because there could be other tables that reference it as a foreign key and modifying it might violate referential constraints.
beware when comparing numbers that are package versions, like checking if grep 2.20 is greater than version 2.6:
$ awk 'BEGIN { print (2.20 >= 2.6) ? "YES" : "NO" }'
NO
$ awk 'BEGIN { print (2.2 >= 2.6) ? "YES" : "NO" }'
NO
$ awk 'BEGIN { print (2.60 == 2.6) ? "YES" : "NO" }'
YES
I solved such problem with such shell/awk function:
# get version of GNU tool
toolversion() {
local prog="$1" operator="$2" value="$3" version
version=$($prog --version | awk '{print $NF; exit}')
awk -vv1="$version" -vv2="$value" 'BEGIN {
split(v1, a, /\./); split(v2, b, /\./);
if (a[1] == b[1]) {
exit (a[2] '$operator' b[2]) ? 0 : 1
}
else {
exit (a[1] '$operator' b[1]) ? 0 : 1
}
}'
}
if toolversion grep '>=' 2.6; then
# do something awesome
fi
I solved my z-index
problem by making the body wrapper z-index:-1
and the body z-index:-2
, and the other divs z-index:1
.
And then the later divs didn't work unless I had z-index
200+. Even though I had position:relative
on each element, with the body at default z-index
it wouldn't work.
Hope this helps somebody.
Newtonsoft is faster than java script serializer. ... this one depends on the Newtonsoft NuGet package, which is popular and better than the default serializer.
one line code solution.
var myclass = Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(Jsonstring);
Myclass oMyclass = Newtonsoft.Json.JsonConvert.DeserializeObject<Myclass>(Jsonstring);
I think many other people have given you mostly correct answers on this matter.
One detail that has been missed, however, is that the "heap" should in fact probably be called the "free store". The reason for this distinction is that the original free store was implemented with a data structure known as a "binomial heap." For that reason, allocating from early implementations of malloc()/free() was allocation from a heap. However, in this modern day, most free stores are implemented with very elaborate data structures that are not binomial heaps.
Basically onSaveInstanceState(Bundle outBundle) will give you a bundle. When you look at the Bundle class, you will see that you can put lots of different stuff inside it. At the next call of onCreate(), you just get that Bundle back as an argument. Then you can read your values again and restore your activity.
Lets say you have an activity with an EditText. The user wrote some text inside it. After that the system calls your onSaveInstanceState(). You read the text from the EditText and write it into the Bundle via Bundle.putString("edit_text_value", theValue).
Now onCreate is called. You check if the supplied bundle is not null. If thats the case, you can restore your value via Bundle.getString("edit_text_value") and put it back into your EditText.
I found the perfect solution
First, you need this script (put it into a file called 'mysql-to-sqlite.sh'):
#!/bin/bash
if [ "x$1" == "x" ]; then
echo "Usage: $0 <dumpname>"
exit
fi
cat $1 |
grep -v ' KEY "' |
grep -v ' UNIQUE KEY "' |
grep -v ' PRIMARY KEY ' |
sed '/^SET/d' |
sed 's/ unsigned / /g' |
sed 's/ auto_increment/ primary key autoincrement/g' |
sed 's/ smallint([0-9]*) / integer /g' |
sed 's/ tinyint([0-9]*) / integer /g' |
sed 's/ int([0-9]*) / integer /g' |
sed 's/ character set [^ ]* / /g' |
sed 's/ enum([^)]*) / varchar(255) /g' |
sed 's/ on update [^,]*//g' |
sed 's/\\r\\n/\\n/g' |
sed 's/\\"/"/g' |
perl -e 'local $/;$_=<>;s/,\n\)/\n\)/gs;print "begin;\n";print;print "commit;\n"' |
perl -pe '
if (/^(INSERT.+?)\(/) {
$a=$1;
s/\\'\''/'\'\''/g;
s/\\n/\n/g;
s/\),\(/\);\n$a\(/g;
}
' > $1.sql
cat $1.sql | sqlite3 $1.db > $1.err
ERRORS=`cat $1.err | wc -l`
if [ $ERRORS == 0 ]; then
echo "Conversion completed without error. Output file: $1.db"
rm $1.sql
rm $1.err
else
echo "There were errors during conversion. Please review $1.err and $1.sql for details."
fi
Then, dump a copy of your database:
you@prompt:~$ mysqldump -u root -p --compatible=ansi --skip-opt generator > dumpfile
And now, run the conversion:
you@prompt:~$ mysql-to-sqlite.sh dumpfile
And if all goes well, you should now have a dumpfile.db which can be used via sqlite3.
you@prompt:~$ sqlite3 dumpfile.db
SQLite version 3.6.10
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> .tables
dg_cities dg_forms dg_surnames
dg_counties dg_provinces dg_user_accounts
dg_countries dg_provinces_netherlands
dg_first_names dg_states
package
will add packaged jar
or war
to your target
folder, We can check it when, we empty the target folder (using mvn clean
) and then run mvn package
.
install
will do all the things that package
does, additionally it will add packaged jar
or war
in local repository as well. We can confirm it by checking in your .m2
folder.
Oracle support Mathematical Subtract -
operator on Data datatype. You may directly put in select clause following statement:
to_char (s.last_upd – s.created, ‘999999D99')
Check the EXAMPLE for more visibility.
In case you need the output in termes of hours, then the below might help;
Select to_number(substr(numtodsinterval([END_TIME]-[START_TIME]),’day’,2,9))*24 +
to_number(substr(numtodsinterval([END_TIME]-[START_TIME],’day’),12,2))
||':’||to_number(substr(numtodsinterval([END_TIME]-[START_TIME],’day’),15,2))
from [TABLE_NAME];
Try this:
<?php
/*
Template Name: [contact us]
*/
get_header();
echo do_shortcode('[CONTACT-US-FORM]');
?>
If you add to RelativeLayout, don't forget to set imageView's position. For instance:
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(200, 200);
lp.addRule(RelativeLayout.CENTER_IN_PARENT); // A position in layout.
ImageView imageView = new ImageView(this); // initialize ImageView
imageView.setLayoutParams(lp);
// imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setImageResource(R.drawable.photo);
RelativeLayout layout = (RelativeLayout) findViewById(R.id.layout);
layout.addView(imageView);
Most answers get you the current path and are context sensitive. In order to run your script from any directory, use the below snippet.
DIR="$( cd "$( dirname "$0" )" && pwd )"
By switching directories in a subshell, we can then call pwd
and get the correct path of the script regardless of context.
You can then use $DIR
as "$DIR/path/to/file"
A List<T>
is already an IEnumerable<T>
, so you can run LINQ statements directly on your List<T>
variable.
If you don't see the LINQ extension methods like OrderBy()
I'm guessing it's because you don't have a using System.Linq
directive in your source file.
You do need to convert the LINQ expression result back to a List<T>
explicitly, though:
List<Customer> list = ...
list = list.OrderBy(customer => customer.Name).ToList()
problem is not in the code, but you don't have added the driver to your project!!!
You have to add the *.jar
driver to your project...
Try putting this in your lib directory, then re-starting tomcat...
problem is Class.forName("com.mysql.jdbc.Driver");
it tries to load the driver, but it is not getting it, this is the reason you are getting:
java.lang.ClassNotFoundException.