I could not get this working with the accepted answer, mainly because I did not know where to enter that code. I looked everywhere for some explanation of the URL Rewrite tool that made sense, but could not find any. I ended up using the HTTP Redirect tool in IIS.
Hope this helps.
Depending on your need you can use one of following method:
if required in all subsequent views then add "using your.domainName;" in _ViewStart.cshtml. You can find more about this in: Where and how is the _ViewStart.cshtml layout file linked?
Or add Assembly reference in View web.config as described by others explained in: How do you implement a @using across all Views in Asp.Net MVC 3?
How to make sure that the application is not tampered with, and how to make sure that the registration mechanism can't be reverse engineered.
Both have the same very simple answer: don't hand out object code to untrusted parties, such as (apparently) your customers. Whether it's feasible to host the application on your machines only depends on what it does.
If it isn't a web application, maybe you can allow for SSH login with X forwarding to an application server (or Remote Desktop Connection, I guess, for Windows).
If you give object code to nerdy type persons, and they think your program might be fun to crack, it will get cracked. No way around it.
If you don't believe me, point out a high-profile application that hasn't been cracked and pirated.
If you go with the hardware keys, it'll make production more expensive and your users are going to hate you for it. It's a real bitch to crawl around on the floor plugging and unplugging your 27 different USB thingies because software makers don't trust you (I imagine).
There are packages out there that will encrypt your EXE and decrypt it when the user is allowed to use it
Of course, the way around it is to crack the "can-I-use-it" test so that it always returns true.
A nasty trick might be to use the byte values of the opcodes that perform the test somewhere else in the program in a dirty way that'll make the program crash with high probability unless the value is just right. It makes you linked to a particular architecture, though :-(
If you are getting a timeout while on the table designer, change the "Transaction time-out after" value under Tools --> Options --> Designers --> Table and Database Designers
This will get rid of this message: "Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding."
Tomcat can work in 2 modes:
Tomcat 7 is BIO by default, although consensus seems to be "don't use Bio because Nio is better in every way". You set this using the protocol
parameter in the server.xml
file.
HTTP/1.1
or org.apache.coyote.http11.Http11Protocol
org.apache.coyote.http11.Http11NioProtocol
If you're using BIO then I believe they should be more or less the same.
If you're using NIO then actually "maxConnections=1000" and "maxThreads=10" might even be reasonable. The defaults are maxConnections=10,000 and maxThreads=200. With NIO, each thread can serve any number of connections, switching back and forth but retaining the connection so you don't need to do all the usual handshaking which is especially time-consuming with HTTPS but even an issue with HTTP. You can adjust the "keepAlive" parameter to keep connections around for longer and this should speed everything up.
If you are already restricted/hardcoded your algorithm to using a std::vector::iterator
and std::vector::iterator
only, it doesn't really matter which method you will end up using. Your algorithm is already concretized beyond the point where choosing one of the other can make any difference. They both do exactly the same thing. It is just a matter of personal preference. I would personally use explicit subtraction.
If, on the other hand, you want to retain a higher degree of generality in your algorithm, namely, to allow the possibility that some day in the future it might be applied to some other iterator type, then the best method depends on your intent. It depends on how restrictive you want to be with regard to the iterator type that can be used here.
If you use the explicit subtraction, your algorithm will be restricted to a rather narrow class of iterators: random-access iterators. (This is what you get now from std::vector
)
If you use distance
, your algorithm will support a much wider class of iterators: input iterators.
Of course, calculating distance
for non-random-access iterators is in general case an inefficient operation (while, again, for random-access ones it is as efficient as subtraction). It is up to you to decide whether your algorithm makes sense for non-random-access iterators, efficiency-wise. It the resultant loss in efficiency is devastating to the point of making your algorithm completely useless, then you should better stick to subtraction, thus prohibiting the inefficient uses and forcing the user to seek alternative solutions for other iterator types. If the efficiency with non-random-access iterators is still in usable range, then you should use distance
and document the fact that the algorithm works better with random-access iterators.
> myMatrix <- matrix(1:10, nrow=2)
> rownames(myMatrix) <- c("A", "B")
> colnames(myMatrix) <- c("A", "B", "C", "D", "E")
> myMatrix
A B C D E
A 1 3 5 7 9
B 2 4 6 8 10
> myMatrix["A", "A"]
[1] 1
> myMatrix["A", ]
A B C D E
1 3 5 7 9
> myMatrix[, "A"]
A B
1 2
If you could get the data as a generic tuple when you read it in or retrieved it, it would be a lot easier; then you would just have to write a Sort function that compares the desired column of the tuple, and you have a single dimension array of tuples.
You can also use get_object_or_404(), it will raise a Http404
if the object wasn't found:
user_pass = log_in(request.POST) #form class
if user_pass.is_valid():
cleaned_info = user_pass.cleaned_data
user_object = get_object_or_404(User, email=cleaned_info['username'])
# User object found, you are good to go!
...
In this specific case it is Smarty, but it could also be Jinja2 templates. They usually also have a .tpl extension.
I obtained much better results with wxPython than tkinter, as suggested in this answer to a later duplicate question:
https://stackoverflow.com/a/9319832
The wxPython version produced the file dialog that looked the same as the open file dialog from just about any other application on my OpenSUSE Tumbleweed installation with the xfce desktop, whereas tkinter produced something cramped and hard to read with an unfamiliar side-scrolling interface.
It's ugly, but you can use the setfacl command to achieve exactly what you want.
On a Solaris machine, I have a file that contains the acls for users and groups. Unfortunately, you have to list all of the users (at least I couldn't find a way to make this work otherwise):
user::rwx
user:user_a:rwx
user:user_b:rwx
...
group::rwx
mask:rwx
other:r-x
default:user:user_a:rwx
default:user:user_b:rwx
....
default:group::rwx
default:user::rwx
default:mask:rwx
default:other:r-x
Name the file acl.lst and fill in your real user names instead of user_X.
You can now set those acls on your directory by issuing the following command:
setfacl -f acl.lst /your/dir/here
I just had this issue from a namespace mismatch. My XAML file was getting ported over and it had a different namespace from that in the code behind file.
The simplest solution is to use option -B or --databases.Then CREATE database command appears in the output file. For example:
mysqldump -uuser -ppassword -d -B --events --routines --triggers database_example > database_example.sql
Here is a dumpfile's header:
-- MySQL dump 10.13 Distrib 5.5.36-34.2, for Linux (x86_64)
--
-- Host: localhost Database: database_example
-- ------------------------------------------------------
-- Server version 5.5.36-34.2-log
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
--
-- Current Database: `database_example`
--
CREATE DATABASE /*!32312 IF NOT EXISTS*/ `database_example` /*!40100 DEFAULT CHARACTER SET utf8 */;
Supposing you have the following file structure:
-css
--index.css
-images
--image1.png
--image2.png
--image3.png
In CSS you can access image1
, for example, using the line ../images/image1.png
.
NOTE: If you are using Chrome, it may doesn't work and you will get an error that the file could not be found. I had the same problem, so I just deleted the entire cache history from chrome and it worked.
Fastest way to do this would be:
int count = 0;
for(int i = 0; i < str.length(); i++) {
if(Character.isWhitespace(str.charAt(i))) count++;
}
This would catch all characters that are considered whitespace.
Regex solutions require compiling regex and excecuting it - with a lot of overhead. Getting character array requires allocation. Iterating over byte array would be faster, but only if you are sure that your characters are ASCII.
I built on sabithpocker's idea and made a more generalized version that lets you control more than one selectbox from a given trigger.
I assigned the selectboxes I wanted to be controlled the classname "switchable," and cloned them all like this:
$j(this).data('options',$j('select.switchable option').clone());
and used a specific naming convention for the switchable selects, which could also translate into classes. In my case, "category" and "issuer" were the select names, and "category_2" and "issuer_1" the class names.
Then I ran an $.each on the select.switchable groups, after making a copy of $(this) for use inside the function:
var that = this;
$j("select.switchable").each(function() {
var thisname = $j(this).attr('name');
var theseoptions = $j(that).data('options').filter( '.' + thisname + '_' + id );
$j(this).html(theseoptions);
});
By using a classname on the ones you want to control, the function will safely ignore other selects elsewhere on the page (such as the last one in the example on Fiddle).
Here's a Fiddle with the complete code:
Pointers can be used like any other iterators:
int x[3] = {1, 2, 3};
std::vector<int> v(x, x + 3);
test(v)
You don't really need any JavaScript with Bootstrap:
<ul class="nav">
<li><a data-target="#" data-toggle="pill" href="#accounts">Accounts</a></li>
<li><a data-target="#" data-toggle="pill" href="#users">Users</a></li>
</ul>
To do more tasks after the menu item is selected you need JS as explained by other posts here.
Hope this helps.
Just passing: and thought i would add some extra info...
you can also throw an exception, this will auto close the windows service, and the auto re-start options just kick in. the only issue with this is that if you have a dev enviroment on your pc then the JIT tries to kick in, and you will get a prompt saying debug Y/N. say no and then it will close, and then re-start properly. (on a PC with no JIT it just all works). the reason im trolling, is this JIT is new to Win 7 (it used to work fine with XP etc) and im trying to find a way of disabling the JIT.... i may try the Environment.Exit method mentioned here see how that works too.
Kristian : Bristol, UK
Ok, personal opinion here, but Append and Prepend imply precise positions in a set.
Push and Pop are really concepts that can be applied to either end of a set... Just as long as you're consistent... For some reason, to me, Push() seems like it should apply to the front of a set...
The simplest way is
>>> a = range(1, 10)
>>> for x in [2, 3, 7]:
... a.remove(x)
...
>>> a
[1, 4, 5, 6, 8, 9]
One possible problem here is that each time you call remove(), all the items are shuffled down the list to fill the hole. So if a
grows very large this will end up being quite slow.
This way builds a brand new list. The advantage is that we avoid all the shuffling of the first approach
>>> removeset = set([2, 3, 7])
>>> a = [x for x in a if x not in removeset]
If you want to modify a
in place, just one small change is required
>>> removeset = set([2, 3, 7])
>>> a[:] = [x for x in a if x not in removeset]
very simple solution for this is by using useRef
hook
const buttonRef = useRef();
const disableButton = () =>{
buttonRef.current.disabled = true; // this disables the button
}
<button
className="btn btn-primary mt-2"
ref={buttonRef}
onClick={disableButton}
>
Add
</button>
Similarly you can enable the button by using buttonRef.current.disabled = false
I am not sure what you understand by "execute from the Command line interface", but you're probably looking after the following select statement:
select * from dba_users;
or
select username from dba_users;
Just an observation I just made while building naive code on OSX with cmake:
cmake ... -DBUILD_SHARED_LIBS=OFF ...
creates .so files
while
cmake ... -DBUILD_SHARED_LIBS=ON ...
creates .dynlib files.
Perhaps this helps anyone.
I just created some directories, shared them and mapped using:
net use y: "\\mycomputername\folder with spaces"
So this solution gets "works on my machine" certificate. What error code do you get?
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//check if spinner2 has a selected item and show the value in edittext
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// sometimes you need nothing here
}
});
spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//check if spinner1 has a selected item and show the value in edittext
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// sometimes you need nothing here
}
});
This answer is written for C++ developers, because I was haunted by such problem as one. Here is the solution:
Instead of
main()
{
}
please type
int main()
{
}
so the main function can be executed.
By the way, if you compile a C/C++ source file with no main function to execute, there will definitely be a bug message saying:
"[Error] Id returned 1 exist status"
But sometimes we just don't need main function in the file, in such a case, just ignore the bug message.
If the data to be encoded contains "exotic" characters, I think you have to encode in "UTF-8"
encoded = base64.b64encode (bytes('data to be encoded', "utf-8"))
I wanted to add that I was having the same issue and flexWrap, flex:1 (in the text components), nothing flex was working for me.
Eventually, I set the width of my text components' wrapper to the width of the device and the text started wrapping.
const win = Dimensions.get('window');
<View style={{
flex: 1,
flexDirection: 'column',
justifyContent: 'center',
alignSelf: 'center',
width: win.width
}}>
<Text style={{ top: 0, alignSelf: 'center' }} >{image.title}</Text>
<Text style={{ alignSelf: 'center' }}>{image.description}</Text>
</View>
If we are use chosen dropdown list, then we can use below css(No JS/JQuery require)
<select chosen="{width: '100%'}" ng-
model="modelName" class="form-control input-
sm"
ng-
options="persons.persons as
persons.persons for persons in
jsonData"
ng-
change="anyFunction(anyParam)"
required>
<option value=""> </option>
</select>
<style>
.chosen-container .chosen-drop {
border-bottom: 0;
border-top: 1px solid #aaa;
top: auto;
bottom: 40px;
}
.chosen-container.chosen-with-drop .chosen-single {
border-top-left-radius: 0px;
border-top-right-radius: 0px;
border-bottom-left-radius: 5px;
border-bottom-right-radius: 5px;
background-image: none;
}
.chosen-container.chosen-with-drop .chosen-drop {
border-bottom-left-radius: 0px;
border-bottom-right-radius: 0px;
border-top-left-radius: 5px;
border-top-right-radius: 5px;
box-shadow: none;
margin-bottom: -16px;
}
</style>
How many characters can a type text field store?
According to Documentation You can use maximum of 21,844 characters if the charset is UTF8
If a lot, would I be able to specify length in the db text type field as I would with varchar?
You dont need to specify the length. If you need more character use data types MEDIUMTEXT or LONGTEXT. With VARCHAR, specifieng length is not for Storage requirement, it is only for how the data is retrieved from data base.
So you cant have the behavior that you want but you can do something that feels like it. You want to be able to do Choice.first.question
what I have done in the past is something like this
class Choice
belongs_to :user
belongs_to :answer
validates_uniqueness_of :answer_id, :scope => [ :question_id, :user_id ]
...
def question
answer.question
end
end
this way the you can now call question on Choice
You can also define a super class for all your activities and find the view once in the parent activity.
for example
AppActivity.java :
public class AppActivity extends AppCompatActivity {
protected View content;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
changeLanguage("fa");
content = findViewById(android.R.id.content);
}
}
and your snacks would look like this in every activity in your app:
Snackbar.make(content, "hello every body", Snackbar.LENGTH_SHORT).show();
It is better for performance you have to find the view once for every activity.
I may be too late to reply this but recently I figured out that jinja2 filters have the capability to handle the generation of encrypted passwords. In my main.yml
I'm generating the encrypted password as:
- name: Creating user "{{ uusername }}" with admin access
user:
name: {{ uusername }}
password: {{ upassword | password_hash('sha512') }}
groups: admin append=yes
when: assigned_role == "yes"
- name: Creating users "{{ uusername }}" without admin access
user:
name: {{ uusername }}
password: {{ upassword | password_hash('sha512') }}
when: assigned_role == "no"
- name: Expiring password for user "{{ uusername }}"
shell: chage -d 0 "{{ uusername }}"
"uusername " and "upassword " are passed as --extra-vars
to the playbook and notice I have used jinja2 filter here to encrypt the passed password.
I have added below tutorial related to this to my blog
If you are using grep
or sed
the syntax will be a little different. Notice that the sequential [^a][^b]
method does not work here:
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n'
jd8a
8$fb
q(c
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^a]$"
8$fb
q(c
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^b]$"
jd8a
q(c
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^c]$"
jd8a
8$fb
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^a][^b]$"
jd8a
q(c
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^a][^c]$"
jd8a
8$fb
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^a^b]$"
q(c
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^a^c]$"
8$fb
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^b^c]$"
jd8a
balter@spectre3:~$ printf 'jd8a\n8$fb\nq(c\n' | grep ".*[^b^c^a]$"
FWIW, I'm finding the same results in Regex101, which I think is JavaScript syntax.
Bad: https://regex101.com/r/MJGAmX/2
Good: https://regex101.com/r/LzrIBu/2
In case anyone is still looking for this functionality: I made an Android library that has this ability and much more, called ExpandableFab (https://github.com/nambicompany/expandable-fab).
The Material Design spec refers to this functionality as 'Speed Dial' and ExpandableFab implements it along with many additional features.
Nearly everything is customizable (colors, text, size, placement, margins, animations and more) and optional (don't need an Overlay, or FabOptions, or Labels, or icons, etc). Every property can be accessed or set through XML layouts or programmatically - whatever you prefer.
Written 100% in Kotlin but comes with full JavaDoc and KDoc (published API is well documented). Also comes with an example app so you can see different use cases with 0 coding.
Github: https://github.com/nambicompany/expandable-fab
Library website (w/ links to full documentation): https://nambicompany.github.io/expandable-fab/
You make a bog standard HTTP GET Request. You get a bog standard HTTP Response with an application/json content type and a JSON document as the body. You then parse this.
Since you have tagged this 'JavaScript' (I assume you mean "from a web page in a browser"), and I assume this is a third party service, you're stuck. You can't fetch data from remote URI in JavaScript unless explicit workarounds (such as JSONP) are put in place.
Oh wait, reading the documentation you linked to - JSONP is available, but you must say 'js' not 'json' and specify a callback: format=js&callback=foo
Then you can just define the callback function:
function foo(myData) {
// do stuff with myData
}
And then load the data:
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = theUrlForTheApi;
document.body.appendChild(script);
Hopefully this helps:
>>> seta = set('1234')
>>> listb = ['a','b','c']
>>> seta.union(listb)
set(['a', 'c', 'b', '1', '3', '2', '4'])
>>> seta
set(['1', '3', '2', '4'])
>>> seta = seta.union(listb)
>>> seta
set(['a', 'c', 'b', '1', '3', '2', '4'])
ORACLE_HOME needs to be at the top level of the Oracle directory structure for the database installation. From that point, Oracle knows how to find all the other files it needs. For example, the error message you get is because Oracle can't locate the message files to report errors with (should be in the various mesg directories below the oracle home. Instead of the above value you give, I would try
export ORACLE_HOME=/usr/lib/oracle/xe/app/oracle/product/10.2.0
If anyone came here from python-graphql client looking for a solution to pass an object as variable here's what I used:
query = """
{{
pairs(block: {block} first: 200, orderBy: trackedReserveETH, orderDirection: desc) {{
id
txCount
reserveUSD
trackedReserveETH
volumeUSD
}}
}}
""".format(block=''.join(['{number: ', str(block), '}']))
query = gql(query)
Make sure to escape all curly braces like I did: "{{", "}}"
You can use it like this: http://plnkr.co/edit/vtNjEgmpItqxX5fdwtPi?p=preview
Like you found, filter
accepts predicate function which accepts item
by item from the array.
So, you just have to create an predicate function based on the given criteria
.
In this example, criteriaMatch
is a function which returns a predicate
function which matches the given criteria
.
template:
<div ng-repeat="item in items | filter:criteriaMatch(criteria)">
{{ item }}
</div>
scope:
$scope.criteriaMatch = function( criteria ) {
return function( item ) {
return item.name === criteria.name;
};
};
Set Copy Enbale to true in netstandard.dll properties.
Open Solution Explorer and right click on netstandard.dll. Set Copy Local to true.
Try to use createChild() method of DOM or insertRow() and insertCell() method of table object in script tag.
Using setInterval:
setInterval(function() {
// your code goes here...
}, 60 * 1000); // 60 * 1000 milsec
The function returns an id you can clear your interval with clearInterval:
var timerID = setInterval(function() {
// your code goes here...
}, 60 * 1000);
clearInterval(timerID); // The setInterval it cleared and doesn't run anymore.
A "sister" function is setTimeout/clearTimeout look them up.
If you want to run a function on page init and then 60 seconds after, 120 sec after, ...:
function fn60sec() {
// runs every 60 sec and runs on init.
}
fn60sec();
setInterval(fn60sec, 60*1000);
There is a method update
on BaseQuery object in SQLAlchemy, which is returned by filter_by
.
num_rows_updated = User.query.filter_by(username='admin').update(dict(email='[email protected]')))
db.session.commit()
The advantage of using update
over changing the entity comes when there are many objects to be updated.
If you want to give add_user
permission to all the admin
s,
rows_changed = User.query.filter_by(role='admin').update(dict(permission='add_user'))
db.session.commit()
Notice that filter_by
takes keyword arguments (use only one =
) as opposed to filter
which takes an expression.
This error is very non-descriptive but the key here is that 'ID' is in uppercase. This indicates that the route has not been correctly set up. To let the application handle URLs with an id, you need to make sure that there's at least one route configured for it. You do this in the RouteConfig.cs located in the App_Start folder. The most common is to add the id as an optional parameter to the default route.
public static void RegisterRoutes(RouteCollection routes)
{
//adding the {id} and setting is as optional so that you do not need to use it for every action
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
Now you should be able to redirect to your controller the way you have set it up.
[HttpPost]
public ActionResult RedirectToImages(int id)
{
return RedirectToAction("Index","ProductImageManager", new { id });
//if the action is in the same controller, you can omit the controller:
//RedirectToAction("Index", new { id });
}
In one or two occassions way back I ran into some issues by normal redirect and had to resort to doing it by passing a RouteValueDictionary. More information on RedirectToAction with parameter
return RedirectToAction("Index", new RouteValueDictionary(
new { controller = "ProductImageManager", action = "Index", id = id } )
);
If you get a very similar error but in lowercase 'id', this is usually because the route expects an id parameter that has not been provided (calling a route without the id /ProductImageManager/Index
). See this so question for more information.
BEWARE : Order of update columns is critical
GOOD: What I want saves existing Value of Status to PrevStatus
UPDATE Collections SET PrevStatus=Status, Status=44 WHERE ID=1487496;
BAD: Status & PrevStatus both end up as 44
UPDATE Collections SET Status=44, PrevStatus=Status WHERE ID=1487496;
I just had the same problem.
By using Task Manager to kill the build process and exiting Eclipse with no projects open, I was able to get back into Eclipse and clean the project without opening it. I then restarted Eclipse again,loaded my project and all OK.
The most important reason of a String being made immutable in Java is Security consideration. Next would be Caching.
I believe other reasons given here, such as efficiency, concurrency, design and string pool follows from the fact that String in made immutable. For eg. String Pool could be created because String was immutable and not the other way around.
Check Gosling interview transcript here
From a strategic point of view, they tend to more often be trouble free. And there are usually things you can do with immutables that you can't do with mutable things, such as cache the result. If you pass a string to a file open method, or if you pass a string to a constructor for a label in a user interface, in some APIs (like in lots of the Windows APIs) you pass in an array of characters. The receiver of that object really has to copy it, because they don't know anything about the storage lifetime of it. And they don't know what's happening to the object, whether it is being changed under their feet.
You end up getting almost forced to replicate the object because you don't know whether or not you get to own it. And one of the nice things about immutable objects is that the answer is, "Yeah, of course you do." Because the question of ownership, who has the right to change it, doesn't exist.
One of the things that forced Strings to be immutable was security. You have a file open method. You pass a String to it. And then it's doing all kind of authentication checks before it gets around to doing the OS call. If you manage to do something that effectively mutated the String, after the security check and before the OS call, then boom, you're in. But Strings are immutable, so that kind of attack doesn't work. That precise example is what really demanded that Strings be immutable
There is an operator missing, likely a *
:
-3.7 need_something_here (prof[x])
The "is not callable" occurs because the parenthesis -- and lack of operator which would have switched the parenthesis into precedence operators -- make Python try to call the result of -3.7
(a float) as a function, which is not allowed.
The parenthesis are also not needed in this case, the following may be sufficient/correct:
-3.7 * prof[x]
As Legolas points out, there are other things which may need to be addressed:
2.25 * (1 - math.pow(math.e, (-3.7(prof[x])/2.25))) * (math.e, (0/2.25)))
^-- op missing
extra parenthesis --^
valid but questionable float*tuple --^
expression yields 0.0 always --^
I think that is your need.
a href="#" onclick="document.forms[0].submit();return false;"
What other answers missed, is that the path given to the function could actually be a directory. Following function makes sure, that the path is really a file.
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}
Another thing to point out: This code could still lead to a race condition, where another thread or process deletes or creates the specified file, while the fileExists function is running.
If you're worried about this, use a lock in your threads, serialize the access to this function or use an inter-process semaphore if multiple applications are involved. If other applications are involved, outside of your control, you're out of luck, I guess.
Just use \t
to space it.
Example:
System.out.println(monthlyInterest + "\t")
//as far as the two 0 in front of it just use a if else statement. ex:
x = x+1;
if (x < 10){
System.out.println("00" +x);
}
else if( x < 100){
System.out.println("0" +x);
}
else{
System.out.println(x);
}
There are other ways to do it, but this is the simplest.
There are subtle and not-so-subtle differences between generic and non-generic collections. They merely use different underlying data structures. For example, Hashtable guarantees one-writer-many-readers without sync. Dictionary does not.
This is more of an xpath question, but like this, assuming the context is the parent element:
<xsl:value-of select="name/@attribute1" />
I use GenMyModel, first released in 2013. It's a real UML modeler, not a drawing tool. Your diagrams are UML-compliant, generate code and can be exported as UML/XMI files. It's web-based and free so it matches your criteria.
Set the minOccurs
attribute to 0
in the schema like so:
<?xml version="1.0"?>
<xs:schema version="1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
<xs:element name="request">
<xs:complexType>
<xs:sequence>
<xs:element name="amenity">
<xs:complexType>
<xs:sequence>
<xs:element name="description" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element> </xs:schema>
If you want to do it right, you need something like this:
use autodie qw(open sysseek sysread truncate);
my $file = shift;
open my $fh, '+>>', $file;
my $pos = tell $fh;
sysseek $fh, $pos - 1, 0;
sysread $fh, my $buf, 1 or die 'No data to read?';
if($buf eq "\n"){
truncate $fh, $pos - 1;
}
We open the file for reading and appending; opening for appending means that we are already seek
ed to the end of the file. We then get the numerical position of the end of the file with tell
. We use that number to seek back one character, and then we read that one character. If it's a newline, we truncate the file to the character before that newline, otherwise, we do nothing.
This runs in constant time and constant space for any input, and doesn't require any more disk space, either.
I ran into this issue after updating the Java JDK, but had not yet restarted my command prompt. After restarting the command prompt, everything worked fine. Presumably, because the PATH variable need to be reset after the JDK update.
If your keys are dynamic I would suggest deserializing directly into a DataTable:
class SampleData
{
[JsonProperty(PropertyName = "items")]
public System.Data.DataTable Items { get; set; }
}
public void DerializeTable()
{
const string json = @"{items:["
+ @"{""Name"":""AAA"",""Age"":""22"",""Job"":""PPP""},"
+ @"{""Name"":""BBB"",""Age"":""25"",""Job"":""QQQ""},"
+ @"{""Name"":""CCC"",""Age"":""38"",""Job"":""RRR""}]}";
var sampleData = JsonConvert.DeserializeObject<SampleData>(json);
var table = sampleData.Items;
// write tab delimited table without knowing column names
var line = string.Empty;
foreach (DataColumn column in table.Columns)
line += column.ColumnName + "\t";
Console.WriteLine(line);
foreach (DataRow row in table.Rows)
{
line = string.Empty;
foreach (DataColumn column in table.Columns)
line += row[column] + "\t";
Console.WriteLine(line);
}
// Name Age Job
// AAA 22 PPP
// BBB 25 QQQ
// CCC 38 RRR
}
You can determine the DataTable column names and types dynamically once deserialized.
Here is a workaround using a flag:
//outside your event or method, but inside your class
private bool IsExecuted = false;
private async Task MethodA()
{
//Do Stuff Here
IsExecuted = true;
}
.
.
.
//Inside your event or method
{
await MethodA();
while (!isExecuted) Thread.Sleep(200); // <-------
await MethodB();
}
Your logic is backwards.
SELECT
*
FROM
`test_table`
WHERE
start_date NOT BETWEEN CAST('2009-12-15' AS DATE) and CAST('2010-01-02' AS DATE)
AND end_date NOT BETWEEN CAST('2009-12-15' AS DATE) and CAST('2010-01-02' AS DATE)
You can do something like this:
public class Example
{
public String name;
public String location;
public String[] getExample()
{
String ar[] = new String[2];
ar[0]= name;
ar[1] = location;
return ar; //returning two values at once
}
}
Most of the issues I've seen with developers complaining that Get Latest doesn't do what they expect stem from the fact that they're performing a Get Latest from Solution Explorer rather than from Source Control Explorer. Solution Explorer only gets the files that are part of the solution and ignores anything that may be required by files within the solution, and therefore part of source control, whereas Source Control explorer compares your local workspace against the repository on the server to determine which files are needed.
If you have your vim compiled with +menu
, you can follow menus with the :help
of console-menu
. From there, you can navigate to Edit.Color\ Scheme
to get the same list as with in gvim
.
Other method is to use a cool script ScrollColors that previews the colorschemes while you scroll the schemes with j/k
.
I came across this solution but this does not really fit my need. So I digged a bit in the d3 source code. I personally would recommend to do it like d3.scale does.
So here you scale the domain to the range. The advantage is that you can flip signs to your target range. This is useful since the y axis on a computer screen goes top down so large values have a small y.
public class Rescale {
private final double range0,range1,domain0,domain1;
public Rescale(double domain0, double domain1, double range0, double range1) {
this.range0 = range0;
this.range1 = range1;
this.domain0 = domain0;
this.domain1 = domain1;
}
private double interpolate(double x) {
return range0 * (1 - x) + range1 * x;
}
private double uninterpolate(double x) {
double b = (domain1 - domain0) != 0 ? domain1 - domain0 : 1 / domain1;
return (x - domain0) / b;
}
public double rescale(double x) {
return interpolate(uninterpolate(x));
}
}
And here is the test where you can see what I mean
public class RescaleTest {
@Test
public void testRescale() {
Rescale r;
r = new Rescale(5,7,0,1);
Assert.assertTrue(r.rescale(5) == 0);
Assert.assertTrue(r.rescale(6) == 0.5);
Assert.assertTrue(r.rescale(7) == 1);
r = new Rescale(5,7,1,0);
Assert.assertTrue(r.rescale(5) == 1);
Assert.assertTrue(r.rescale(6) == 0.5);
Assert.assertTrue(r.rescale(7) == 0);
r = new Rescale(-3,3,0,1);
Assert.assertTrue(r.rescale(-3) == 0);
Assert.assertTrue(r.rescale(0) == 0.5);
Assert.assertTrue(r.rescale(3) == 1);
r = new Rescale(-3,3,-1,1);
Assert.assertTrue(r.rescale(-3) == -1);
Assert.assertTrue(r.rescale(0) == 0);
Assert.assertTrue(r.rescale(3) == 1);
}
}
Try in your connection string to set MultipleActiveResultSets=true
.
This allow multitasking on database.
Server=yourserver ;AttachDbFilename=database;User Id=sa;Password=blah ;MultipleActiveResultSets=true;App=EntityFramework
That works for me ... whether your connection in app.config or you set it programmatically ... hope this helpful
Check this validation library Files : http://bassistance.de/jquery-plugins/jquery-plugin-validation/ Demo : http://jquery.bassistance.de/validate/demo/
In C#, the For loop is slightly faster.
For loop average about 2.95 to 3.02 ms.
The While loop averaged about 3.05 to 3.37 ms.
Quick little console app to prove:
class Program
{
static void Main(string[] args)
{
int max = 1000000000;
Stopwatch stopWatch = new Stopwatch();
if (args.Length == 1 && args[0].ToString() == "While")
{
Console.WriteLine("While Loop: ");
stopWatch.Start();
WhileLoop(max);
stopWatch.Stop();
DisplayElapsedTime(stopWatch.Elapsed);
}
else
{
Console.WriteLine("For Loop: ");
stopWatch.Start();
ForLoop(max);
stopWatch.Stop();
DisplayElapsedTime(stopWatch.Elapsed);
}
}
private static void WhileLoop(int max)
{
int i = 0;
while (i <= max)
{
//Console.WriteLine(i);
i++;
};
}
private static void ForLoop(int max)
{
for (int i = 0; i <= max; i++)
{
//Console.WriteLine(i);
}
}
private static void DisplayElapsedTime(TimeSpan ts)
{
// Format and display the TimeSpan value.
string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
ts.Hours, ts.Minutes, ts.Seconds,
ts.Milliseconds / 10);
Console.WriteLine(elapsedTime, "RunTime");
}
}
The correct form, based on the original syntax, and correctly normalized is:
def gaussian(x, mu, sig):
return 1./(np.sqrt(2.*np.pi)*sig)*np.exp(-np.power((x - mu)/sig, 2.)/2)
awk -F"," '!_[$1]++' file
-F
sets the field separator.$1
is the first field._[val]
looks up val
in the hash _
(a regular variable).++
increment, and return old value.!
returns logical not.http://www.jetbrains.com/idea/docs/ReferenceCard70_mac.pdf has everything you need. after a while, you'll develop your own preference for certain shortcuts.
Cloning the objects before adding them. For example, instead of newList.addAll(oldList);
for(Person p : oldList) {
newList.add(p.clone());
}
Assuming clone
is correctly overriden inPerson
.
Do I understand correctly that you just want to define some utility methods and make them available in templates?
You don't have to add them to every controller. Just define a single controller for all the utility methods and attach that controller to <html> or <body> (using the ngController directive). Any other controllers you attach anywhere under <html> (meaning anywhere, period) or <body> (anywhere but <head>) will inherit that $scope and will have access to those methods.
I personally think about it like a for
loop:
a[start:end:step]
# for(i = start; i < end; i += step)
Also, note that negative values for start
and end
are relative to the end of the list and computed in the example above by given_index + a.shape[0]
.
I have read some article before and it's working fine but really don't know is safe or not
a. Create new folder local.
b. Move all project into the local folder expect public folder.
c. Move all the content of public folder to project root.
d. Delete the blank public folder
f. Edit the index file.
Edit the index.php
require __DIR__.'/../bootstrap/autoload.php';
$app = require_once __DIR__.'/../bootstrap/app.php';
to
require __DIR__.'/local/bootstrap/autoload.php';
$app = require_once __DIR__.'/local/bootstrap/app.php';
I've had a few cranberry-vodkas tonight so I might be missing something...Is setting the range necessary? Why not use:
Activeworkbook.Sheets("Game").Range("A1").value = "Subtotal"
Does this fail as well?
Looks like you tried something similar:
'Worksheets("Game").Range("A1") = "Asdf"
However, Worksheets is a collection, so you can't reference "Game". I think you need to use the Sheets object instead.
In most regex implementations (including Java's), :
has no special meaning, neither inside nor outside a character class.
Your problem is most likely due to the fact the -
acts as a range operator in your class:
[A-Za-z0-9.,-:]*
where ,-:
matches all ascii characters between ','
and ':'
. Note that it still matches the literal ':'
however!
Try this instead:
[A-Za-z0-9.,:-]*
By placing -
at the start or the end of the class, it matches the literal "-"
. As mentioned in the comments by Keoki Zee, you can also escape the -
inside the class, but most people simply add it at the end.
A demo:
public class Test {
public static void main(String[] args) {
System.out.println("8:".matches("[,-:]+")); // true: '8' is in the range ','..':'
System.out.println("8:".matches("[,:-]+")); // false: '8' does not match ',' or ':' or '-'
System.out.println(",,-,:,:".matches("[,:-]+")); // true: all chars match ',' or ':' or '-'
}
}
Doesn't allow duplicates in the sense, It allow to add you but it does'nt care about this key already have a value or not. So at present for one key there will be only one value
It silently overrides the value
for null
key. No exception.
When you try to get, the last inserted value with null
will be return.
That is not only with null
and for any key.
Have a quick example
Map m = new HashMap<String, String>();
m.put("1", "a");
m.put("1", "b"); //no exception
System.out.println(m.get("1")); //b
Here is another solution which uses any/2
map(select(any(.Names[]; contains("data"))|not)|.Id)[]
with the sample data and the -r
option it produces
cb94e7a42732b598ad18a8f27454a886c1aa8bbba6167646d8f064cd86191e2b
a4b7e6f5752d8dcb906a5901f7ab82e403b9dff4eaaeebea767a04bac4aada19
Any user whose login shell setting in /etc/passwd
is an interactive shell can login. I don't think there's a totally reliable way to tell if a program is an interactive shell; checking whether it's in /etc/shells
is probably as good as you can get.
Other users can also login, but the program they run should not allow them to get much access to the system. And users that aren't allowed to login at all should have /etc/false
as their shell -- this will just log them out immediately.
The data
variable contains a Buffer
object. Convert it into ASCII encoding using the following syntax:
data.toString('ascii', 0, data.length)
Asynchronously:
fs.readFile('test.txt', 'utf8', function (error, data) {
if (error) throw error;
console.log(data.toString());
});
Here is the script I use:
@ECHO off
SETLOCAL ENABLEDELAYEDEXPANSION
mode con:cols=210 lines=50
ECHO Starting 1-way backup of MEDIA(M:) to BACKUP(G:)...
robocopy.exe M:\ G:\ *.* /E /PURGE /SEC /NP /NJH /NJS /XD "$RECYCLE.BIN" "System Volume Information" /TEE /R:5 /COPYALL /LOG:from_M_to_G.log
ECHO Finished with backup.
pause
You can't put a div
directly inside a table
, like this:
<!-- INVALID -->
<table>
<div>
Hello World
</div>
</table>
Putting a div
inside a td
or th
element is fine, however:
<!-- VALID -->
<table>
<tr>
<td>
<div>
Hello World
</div>
</td>
</tr>
</table>
You can do so by creating an array of dtype=object
. If you try to assign a long string to a normal numpy array, it truncates the string:
>>> a = numpy.array(['apples', 'foobar', 'cowboy'])
>>> a[2] = 'bananas'
>>> a
array(['apples', 'foobar', 'banana'],
dtype='|S6')
But when you use dtype=object
, you get an array of python object references. So you can have all the behaviors of python strings:
>>> a = numpy.array(['apples', 'foobar', 'cowboy'], dtype=object)
>>> a
array([apples, foobar, cowboy], dtype=object)
>>> a[2] = 'bananas'
>>> a
array([apples, foobar, bananas], dtype=object)
Indeed, because it's an array of objects, you can assign any kind of python object to the array:
>>> a[2] = {1:2, 3:4}
>>> a
array([apples, foobar, {1: 2, 3: 4}], dtype=object)
However, this undoes a lot of the benefits of using numpy, which is so fast because it works on large contiguous blocks of raw memory. Working with python objects adds a lot of overhead. A simple example:
>>> a = numpy.array(['abba' for _ in range(10000)])
>>> b = numpy.array(['abba' for _ in range(10000)], dtype=object)
>>> %timeit a.copy()
100000 loops, best of 3: 2.51 us per loop
>>> %timeit b.copy()
10000 loops, best of 3: 48.4 us per loop
All the above answers are of good quality,but this one's just to memorize.The name Mutex is derived from Mutually Exclusive hence you are motivated to think of a mutex lock as Mutual Exclusion between two as in only one at a time,and if I possessed it you can have it only after I release it.On the other hand such case doesn't exist for Semaphore is just like a traffic signal(which the word Semaphore also means).
I'm adding this for posterity; There's an easier way that doesn't involve writing more JS. Using the amazing firebug addon for firefox,
Try following if your looking for while loop implementation.
List<String> myString = new ArrayList<String>();
// How you add your data in string list
myString.add("Test 1");
myString.add("Test 2");
myString.add("Test 3");
myString.add("Test 4");
int i = 0;
while (i < myString.size()) {
System.out.println(myString.get(i));
i++;
}
By the way it is written, clean rule is invoked only if it is explicitly called:
make clean
I think it is better, than make clean every time. If you want to do this by your way, try this:
CXX = g++ -O2 -Wall all: clean code1 code2 code1: code1.cc utilities.cc $(CXX) $^ -o $@ code2: code2.cc utilities.cc $(CXX) $^ -o $@ clean: rm ... echo Clean done
You can get this if you ONLY configure https
as a site binding inside IIS.
You need to add http(80)
as well as https(443)
- at least I did :-)
In Python self
is the conventional name given to the first argument of instance methods of classes, which is always the instance the method was called on:
class A(object):
def f(self):
print self
a = A()
a.f()
Will give you something like
<__main__.A object at 0x02A9ACF0>
From the printf manpage:
l (ell) A following integer conversion corresponds to a long int or unsigned long int argument, or a following n conversion corresponds to a pointer to a long int argument, or a following c conversion corresponds to a wint_t argument, or a following s conversion corresponds to a pointer to wchar_t argument.
and
L A following a, A, e, E, f, F, g, or G conversion corresponds to a long double argument. (C99 allows %LF, but SUSv2 does not.)
So, you want %Le
, not %le
Edit: Some further investigation seems to indicate that Mingw uses the MSVC/win32 runtime(for stuff like printf) - which maps long double to double. So mixing a compiler (like gcc) that provides a native long double with a runtime that does not seems to .. be a mess.
I think there's an even easier way now. This enables basic caching for all $http requests (which $resource inherits):
var app = angular.module('myApp',[])
.config(['$httpProvider', function ($httpProvider) {
// enable http caching
$httpProvider.defaults.cache = true;
}])
Just add
xAxis: {
...
lineWidth: 0,
minorGridLineWidth: 0,
lineColor: 'transparent',
...
labels: {
enabled: false
},
minorTickLength: 0,
tickLength: 0
}
to the xAxis definition.
Since Version 4.1.9 you can simply use the axis attribute visible
:
xAxis: {
visible: false,
}
Following will work like a charm (assuming you have div/span/table/tr/td/etc with "id"="myId"
)
$("#myId").hover(function() {
$(this).css('cursor','pointer').attr('title', 'This is a hover text.');
}, function() {
$(this).css('cursor','auto');
});
As a complimentary, .css('cursor','pointer')
will change the mouse pointer on hover.
The inputmask plugin does the best job of this. Its extremely flexible in that you can supply whatever regex you like to restrict input. It also does not require JQuery.
Step 1: Install the plugin:
npm install --save inputmask
Step2: create a directive to wrap the input mask:
import {Directive, ElementRef, Input} from '@angular/core';
import * as Inputmask from 'inputmask';
@Directive({
selector: '[app-restrict-input]',
})
export class RestrictInputDirective {
// map of some of the regex strings I'm using (TODO: add your own)
private regexMap = {
integer: '^[0-9]*$',
float: '^[+-]?([0-9]*[.])?[0-9]+$',
words: '([A-z]*\\s)*',
point25: '^\-?[0-9]*(?:\\.25|\\.50|\\.75|)$'
};
constructor(private el: ElementRef) {}
@Input('app-restrict-input')
public set defineInputType(type: string) {
Inputmask({regex: this.regexMap[type], placeholder: ''})
.mask(this.el.nativeElement);
}
}
Step 3:
<input type="text" app-restrict-input="integer">
Check out their github docs for more information.
Well, as far as primitive integer types go, Java doesnt handle Over/Underflow at all (for float and double the behaviour is different, it will flush to +/- infinity just as IEEE-754 mandates).
When adding two int's, you will get no indication when an overflow occurs. A simple method to check for overflow is to use the next bigger type to actually perform the operation and check if the result is still in range for the source type:
public int addWithOverflowCheck(int a, int b) {
// the cast of a is required, to make the + work with long precision,
// if we just added (a + b) the addition would use int precision and
// the result would be cast to long afterwards!
long result = ((long) a) + b;
if (result > Integer.MAX_VALUE) {
throw new RuntimeException("Overflow occured");
} else if (result < Integer.MIN_VALUE) {
throw new RuntimeException("Underflow occured");
}
// at this point we can safely cast back to int, we checked before
// that the value will be withing int's limits
return (int) result;
}
What you would do in place of the throw clauses, depends on your applications requirements (throw, flush to min/max or just log whatever). If you want to detect overflow on long operations, you're out of luck with primitives, use BigInteger instead.
Edit (2014-05-21): Since this question seems to be referred to quite frequently and I had to solve the same problem myself, its quite easy to evaluate the overflow condition by the same method a CPU would calculate its V flag.
Its basically a boolean expression that involves the sign of both operands as well as the result:
/**
* Add two int's with overflow detection (r = s + d)
*/
public static int add(final int s, final int d) throws ArithmeticException {
int r = s + d;
if (((s & d & ~r) | (~s & ~d & r)) < 0)
throw new ArithmeticException("int overflow add(" + s + ", " + d + ")");
return r;
}
In java its simpler to apply the expression (in the if) to the entire 32 bits, and check the result using < 0 (this will effectively test the sign bit). The principle works exactly the same for all integer primitive types, changing all declarations in above method to long makes it work for long.
For smaller types, due to the implicit conversion to int (see the JLS for bitwise operations for details), instead of checking < 0, the check needs to mask the sign bit explicitly (0x8000 for short operands, 0x80 for byte operands, adjust casts and parameter declaration appropiately):
/**
* Subtract two short's with overflow detection (r = d - s)
*/
public static short sub(final short d, final short s) throws ArithmeticException {
int r = d - s;
if ((((~s & d & ~r) | (s & ~d & r)) & 0x8000) != 0)
throw new ArithmeticException("short overflow sub(" + s + ", " + d + ")");
return (short) r;
}
(Note that above example uses the expression need for subtract overflow detection)
So how/why do these boolean expressions work? First, some logical thinking reveals that an overflow can only occur if the signs of both arguments are the same. Because, if one argument is negative and one positive, the result (of add) must be closer to zero, or in the extreme case one argument is zero, the same as the other argument. Since the arguments by themselves can't create an overflow condition, their sum can't create an overflow either.
So what happens if both arguments have the same sign? Lets take a look at the case both are positive: adding two arguments that create a sum larger than the types MAX_VALUE, will always yield a negative value, so an overflow occurs if arg1 + arg2 > MAX_VALUE. Now the maximum value that could result would be MAX_VALUE + MAX_VALUE (the extreme case both arguments are MAX_VALUE). For a byte (example) that would mean 127 + 127 = 254. Looking at the bit representations of all values that can result from adding two positive values, one finds that those that overflow (128 to 254) all have bit 7 set, while all that do not overflow (0 to 127) have bit 7 (topmost, sign) cleared. Thats exactly what the first (right) part of the expression checks:
if (((s & d & ~r) | (~s & ~d & r)) < 0)
(~s & ~d & r) becomes true, only if, both operands (s, d) are positive and the result (r) is negative (the expression works on all 32 bits, but the only bit we're interested in is the topmost (sign) bit, which is checked against by the < 0).
Now if both arguments are negative, their sum can never be closer to zero than any of the arguments, the sum must be closer to minus infinity. The most extreme value we can produce is MIN_VALUE + MIN_VALUE, which (again for byte example) shows that for any in range value (-1 to -128) the sign bit is set, while any possible overflowing value (-129 to -256) has the sign bit cleared. So the sign of the result again reveals the overflow condition. Thats what the left half (s & d & ~r) checks for the case where both arguments (s, d) are negative and a result that is positive. The logic is largely equivalent to the positive case; all bit patterns that can result from adding two negative values will have the sign bit cleared if and only if an underflow occured.
nchar requires more space than nvarchar.
eg,
A nchar(100) will always store 100 characters even if you only enter 5, the remaining 95 chars will be padded with spaces. Storing 5 characters in a nvarchar(100) will save 5 characters.
When you define any variable then you do not have to put in any extra spaces.
E.g.
name = "Stack Overflow"
// it is not valid, you will get an error saying- "Command not found"
So remove spaces:
name="Stack Overflow"
and it will work fine.
The MySQL Utilities contain the nice tool mysqldbcopy
which by default copies a DB including all related objects (“tables, views, triggers, events, procedures, functions, and database-level grants”) and data from one DB server to the same or to another DB server. There are lots of options available to customize what is actually copied.
So, to answer the OP’s question:
mysqldbcopy \
--source=root:your_password@localhost \
--destination=root:your_password@localhost \
sitedb1:sitedb2
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
serves two purposes.
IE=edge
: specifies that IE should run in the highest mode available to that version of IE as opposed to a compatability mode; IE8 can support up to IE8 modes, IE9 can support up to IE9 modes, and so on.chrome=1
: specifies that Google Chrome frame should start if the user has it installedThe IE=edge
flag is still relevant for IE versions 10 and below. IE11 sets this mode as the default.
As for the chrome flag, you can leave it if your users still use Chrome Frame. Despite support and updates for Chrome Frame ending, one can still install and use the final release. If you remove the flag, Chrome Frame will not be activated when installed. For other users, chrome=1
will do nothing more than consume a few bytes of bandwidth.
I recommend you analyze your audience and see if their browsers prohibit any needed features and then decide. Perhaps it might be better to encourage them to use a more modern, evergreen browser.
Note, the W3C validator will flag chrome=1
as an error:
Error: A meta element with an http-equiv attribute whose value is
X-UA-Compatible must have a content attribute with the value IE=edge.
Following code should work,
URL url = new URL("http://maps.google.at/maps?saddr=4714&daddr=Marchtrenk&hl=de");
InputStream is = url.openConnection().getInputStream();
BufferedReader reader = new BufferedReader( new InputStreamReader( is ) );
String line = null;
while( ( line = reader.readLine() ) != null ) {
System.out.println(line);
}
reader.close();
As supplementary, if you are reading a vvvvery large file, and you don't want read all of the content into memory at once, you might consider using a buffer, then return each word by yield:
def read_words(inputfile):
with open(inputfile, 'r') as f:
while True:
buf = f.read(10240)
if not buf:
break
# make sure we end on a space (word boundary)
while not str.isspace(buf[-1]):
ch = f.read(1)
if not ch:
break
buf += ch
words = buf.split()
for word in words:
yield word
yield '' #handle the scene that the file is empty
if __name__ == "__main__":
for word in read_words('./very_large_file.txt'):
process(word)
Setting the timeout in the web.xml is the correct way to set the timeout.
CONVERT(DATA_TYPE , Your_Column)
is the syntax for CONVERT method in SQL. From this convert function we can convert the data of the Column which is on the right side of the comma (,) to the data type in the left side of the comma (,) Please see below example.
SELECT CONVERT (VARCHAR(10), ColumnName) FROM TableName
Create repository on dockerhub :
$docker tag IMAGE_ID UsernameOnDockerhub/repoNameOnDockerhub:latest
$docker push UsernameOnDockerhub/repoNameOnDockerhub:latest
Note : here "repoNameOnDockerhub" : repository with the name you are mentioning has to be present on dockerhub
"latest" : is just tag
tf.contrib
has moved out of TF starting TF 2.0 alpha.
Take a look at these tf 2.0 release notes https://github.com/tensorflow/tensorflow/releases/tag/v2.0.0-alpha0
You can upgrade your TF 1.x code to TF 2.x using the tf_upgrade_v2
script
https://www.tensorflow.org/alpha/guide/upgrade
min_element
and max_element
return iterators, not values. So you need *min_element...
and *max_element...
.
Another option might be numpy.asarray:
import numpy as np
a = ["1.1", "2.2", "3.2"]
b = np.asarray(a, dtype=np.float64, order='C')
For Python 2*:
print a, type(a), type(a[0])
print b, type(b), type(b[0])
resulting in:
['1.1', '2.2', '3.2'] <type 'list'> <type 'str'>
[1.1 2.2 3.2] <type 'numpy.ndarray'> <type 'numpy.float64'>
Yes you can do this. RelativeLayout, LinearLayout, etc are Views so a custom layout is a custom view. Just something to consider because if you wanted to create a custom layout you could.
What you want to do is create a Compound Control. You'll create a subclass of RelativeLayout, add all our your components in code (TextView, etc), and in your constructor you can read the attributes passed in from the XML. You can then pass that attribute to your title TextView.
http://developer.android.com/guide/topics/ui/custom-components.html
Even I was thinking the same. If you open Activity Monitor
you can see that it is downloading something at there on the name of GIT.
I found this tip useful.
The following will parse an XML string into an XML document in all major browsers, including Internet Explorer 6. Once you have that, you can use the usual DOM traversal methods/properties such as childNodes and getElementsByTagName() to get the nodes you want.
var parseXml;
if (typeof window.DOMParser != "undefined") {
parseXml = function(xmlStr) {
return ( new window.DOMParser() ).parseFromString(xmlStr, "text/xml");
};
} else if (typeof window.ActiveXObject != "undefined" &&
new window.ActiveXObject("Microsoft.XMLDOM")) {
parseXml = function(xmlStr) {
var xmlDoc = new window.ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async = "false";
xmlDoc.loadXML(xmlStr);
return xmlDoc;
};
} else {
throw new Error("No XML parser found");
}
Example usage:
var xml = parseXml("<foo>Stuff</foo>");
alert(xml.documentElement.nodeName);
Which I got from https://stackoverflow.com/a/8412989/1232175.
You want to apply a custom formatting rule. The "Applies to" field should be your entire row (If you want to format row 5, put in =$5:$5
. The custom formula should be =IF($B$5="X", TRUE, FALSE)
, shown in the example below.
In NHibernate (with NHibernate.Linq) you could do it as follows:
return session.Query<T>()
.Single(a => a.Filter == filter &&
a.Id == session.Query<T>()
.Where(a2 => a2.Filter == filter)
.Max(a2 => a2.Id));
Which will generate SQL like follows:
select *
from TableName foo
where foo.Filter = 'Filter On String'
and foo.Id = (select cast(max(bar.RowVersion) as INT)
from TableName bar
where bar.Name = 'Filter On String')
Which seems pretty efficient to me.
iOS 3.2 and later support this. Straight from the What's New in iPhone OS 3.2 doc:
Custom Font Support
Applications that want to use custom fonts can now include those fonts in their application bundle and register those fonts with the system by including the UIAppFonts key in their Info.plist file. The value of this key is an array of strings identifying the font files in the application’s bundle. When the system sees the key, it loads the specified fonts and makes them available to the application.
Once the fonts have been set in the Info.plist
, you can use your custom fonts as any other font in IB or programatically.
There is an ongoing thread on Apple Developer Forums:
https://devforums.apple.com/thread/37824 (login required)
And here's an excellent and simple 3 steps tutorial on how to achieve this (broken link removed)
Info.plist
file called UIAppFonts
.UIAppFonts
arrayInfo.plist
[UIFont fontWithName:@"CustomFontName" size:12]
to get the custom font to use with your UILabels and UITextViews, etc…Also: Make sure the fonts are in your Copy Bundle Resources.
Simply set includeantruntime="false"
:
<javac includeantruntime="false" ...>...</javac>
If you have to use the javac
-task multiple times you might want to consider using PreSetDef
to define your own javac
-task that always sets includeantruntime="false"
.
From http://www.coderanch.com/t/503097/tools/warning-includeantruntime-was-not-set:
That's caused by a misfeature introduced in Ant 1.8. Just add an attribute of that name to the javac task, set it to false, and forget it ever happened.
From http://ant.apache.org/manual/Tasks/javac.html:
Whether to include the Ant run-time libraries in the classpath; defaults to yes, unless build.sysclasspath is set. It is usually best to set this to false so the script's behavior is not sensitive to the environment in which it is run.
You can add the rules based on that selector using .rules("add", options)
, just remove any rules you want class based out of your validate options, and after calling $(".formToValidate").validate({... });
, do this:
$(".checkBox").rules("add", {
required:true,
minlength:3
});
You should use is as follows:
DECIMAL(m,a)
m
is the number of total digits your decimal can have.
a
is the max number of digits you can have after the decimal point.
http://www.tsqltutorials.com/datatypes.php has descriptions for all the datatypes.
If the two ranges to be tested (your given cell and your given range) are not in the same Worksheet
, then Application.Intersect
throws an error. Thus, a way to avoid it is with something like
Sub test_inters(rng1 As Range, rng2 As Range)
If (rng1.Parent.Name = rng2.Parent.Name) Then
Dim ints As Range
Set ints = Application.Intersect(rng1, rng2)
If (Not (ints Is Nothing)) Then
' Do your job
End If
End If
End Sub
If need to run ant in eclipse with inbuilt eclipse jdk add the below line in build.xml
<property name="build.compiler" value="org.eclipse.jdt.core.JDTCompilerAdapter"/>
Quoted from monsur,
The Access-Control-Allow-Headers header does not allow wildcards. It must be an exact match: http://www.w3.org/TR/cors/#access-control-allow-headers-response-header.
So here is my php solution.
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
$headers=getallheaders();
@$ACRH=$headers["Access-Control-Request-Headers"];
header("Access-Control-Allow-Headers: $ACRH");
}
To restore all those deleted files in a folder, enter the following command.
git ls-files -d | xargs git checkout --
In jQuery, a new element can be created by passing a HTML string to the constructor, as shown below:
var img = $('<img id="dynamic">'); //Equivalent: $(document.createElement('img'))
img.attr('src', responseObject.imgurl);
img.appendTo('#imagediv');
If you want to go with the add-open option, here's a command to find which module provides which package ->
java --list-modules | tr @ " " | awk '{ print $1 }' | xargs -n1 java -d
the name of the module will be shown with the @ while the name of the packages without it
NOTE: tested with JDK 11
IMPORTANT: obviously is better than the provider of the package does not do the illegal access
This is a stab in the dark, but maybe do you need to wrap your JSON arguments; like say something like this:
data: "{'Ids':[{'Id1':'2'},{'Id2':'2'}]}"
Make sure your JSON is properly formed?
For now no jquery or php needed. Use just "required" HTML5 input attrbute like here
<form>
<p>
<input class="form-control" type="text" name="email" />
<input type="submit" value="ok" class="btn btn-success" name="submit" />
<input type="hidden" name="action" value="0" />
</p>
<p><input type="checkbox" required name="terms">I have read and accept <a href="#">SOMETHING Terms and Conditions</a></p>
</form>
This will validate and prevent any submit before checkbox is opt in. Language independent solution because its generated by users web browser.
This is what has worked for me:
Consider the partial map.cshtml
at Partials/Map.cshtml
. This can be called from the Page where the partial is to be rendered, simply by using the <partial>
tag:
<partial name="Partials/Map" model="new Pages.Partials.MapModel()" />
This is one of the easiest methods I encountered (although I am using razor pages, I am sure same is for MVC too)
The issue is with the h1
header margin. You need to try this:
h1 {
margin-top:0;
}
1.Generate a war file from your application
2. open tomcat manager, go down the page
3. Click on browse to deploy the war.
4. choose your war file.
There you go!
The best move is to just nest a flexbox inside of a flexbox. All you have to do is give the child align-items: center
. This will vertically align the text inside of its parent.
// Assuming a horizontally centered row of items for the parent but it doesn't have to be
.parent {
align-items: center;
display: flex;
justify-content: center;
}
.child {
display: flex;
align-items: center;
}
This code makes a window with the conditions that the user cannot change the dimensions of the Tk()
window, and also disables the maximise button.
import tkinter as tk
root = tk.Tk()
root.resizable(width=False, height=False)
root.mainloop()
Within the program you can change the window dimensions with @Carpetsmoker's answer, or by doing this:
root.geometry('{}x{}'.format(<widthpixels>, <heightpixels>))
It should be fairly easy for you to implement that into your code. :)
This error happens when the branch you are switching to, has changes that your current branch doesn't have.
If you are seeing this error when you try to switch to a new branch, then your current branch is probably behind one or more commits. If so, run:
git fetch
You should also remove dependencies which may also conflict with the destination branch.
For example, for iOS developers:
pod deintegrate
then try checking out a branch again.
If the desired branch isn't new you can either cherry pick a commit and fix the conflicts or stash the changes and then fix the conflicts.
1. Git Stash (recommended)
git stash
git checkout <desiredBranch>
git stash apply
2. Cherry pick (more work)
git add <your file>
git commit -m "Your message"
git log
Copy the sha of your commit. Then discard unwanted changes:
git checkout .
git checkout -- .
git clean -f -fd -fx
Make sure your branch is up to date:
git fetch
Then checkout to the desired branch
git checkout <desiredBranch>
Then cherry pick the other commit:
git cherry-pick <theSha>
Now fix the conflict.
git checkout -f branch
If you want timestamps that correspond to actual real times BUT also want them to be unique (for a given application instance), you can use the following code:
public class HiResDateTime
{
private static long lastTimeStamp = DateTime.UtcNow.Ticks;
public static long UtcNowTicks
{
get
{
long orig, newval;
do
{
orig = lastTimeStamp;
long now = DateTime.UtcNow.Ticks;
newval = Math.Max(now, orig + 1);
} while (Interlocked.CompareExchange
(ref lastTimeStamp, newval, orig) != orig);
return newval;
}
}
}
For IPv4 addresses, you can use VARCHAR to store them as strings, but also look into storing them as long integesrs INT(11) UNSIGNED
. You can use MySQL's INET_ATON()
function to convert them to integer representation. The benefit of this is it allows you to do easy comparisons on them, like BETWEEN
queries
I would suggest that you do not use the solutions that use a <span>
wrapper because it isn't valid HTML, which could cause problems down the road. I think the preferred solution is to actually remove any options that you wish to hide, and restore them as needed. Using jQuery, you'll only need these 3 functions:
The first function will save the original contents of the select. Just to be safe, you may want to call this function when you load the page.
function setOriginalSelect ($select) {
if ($select.data("originalHTML") == undefined) {
$select.data("originalHTML", $select.html());
} // If it's already there, don't re-set it
}
This next function calls the above function to ensure that the original contents have been saved, and then simply removes the options from the DOM.
function removeOptions ($select, $options) {
setOriginalSelect($select);
$options.remove();
}
The last function can be used whenever you want to "reset" back to all the original options.
function restoreOptions ($select) {
var ogHTML = $select.data("originalHTML");
if (ogHTML != undefined) {
$select.html(ogHTML);
}
}
Note that all these functions expect that you're passing in jQuery elements. For example:
// in your search function...
var $s = $('select.someClass');
var $optionsThatDontMatchYourSearch= $s.find('options.someOtherClass');
restoreOptions($s); // Make sure you're working with a full deck
removeOptions($s, $optionsThatDontMatchYourSearch); // remove options not needed
Here is a working example: http://jsfiddle.net/9CYjy/23/
@Martin Konecny's answer provides the correct answer, but - as he mentions - it only works if the actual script is not invoked through a symlink residing in a different directory.
This answer covers that case: a solution that also works when the script is invoked through a symlink or even a chain of symlinks:
Linux / GNU readlink
solution:
If your script needs to run on Linux only or you know that GNU readlink
is in the $PATH
, use readlink -f
, which conveniently resolves a symlink to its ultimate target:
scriptDir=$(dirname -- "$(readlink -f -- "$BASH_SOURCE")")
Note that GNU readlink
has 3 related options for resolving a symlink to its ultimate target's full path: -f
(--canonicalize
), -e
(--canonicalize-existing
), and -m
(--canonicalize-missing
) - see man readlink
.
Since the target by definition exists in this scenario, any of the 3 options can be used; I've chosen -f
here, because it is the most well-known one.
Multi-(Unix-like-)platform solution (including platforms with a POSIX-only set of utilities):
If your script must run on any platform that:
has a readlink
utility, but lacks the -f
option (in the GNU sense of resolving a symlink to its ultimate target) - e.g., macOS.
readlink
; note that recent versions of FreeBSD/PC-BSD do support -f
.does not even have readlink
, but has POSIX-compatible utilities - e.g., HP-UX (thanks, @Charles Duffy).
The following solution, inspired by https://stackoverflow.com/a/1116890/45375,
defines helper shell function, rreadlink()
, which resolves a given symlink to its ultimate target in a loop - this function is in effect a POSIX-compliant implementation of GNU readlink
's -e
option, which is similar to the -f
option, except that the ultimate target must exist.
Note: The function is a bash
function, and is POSIX-compliant only in the sense that only POSIX utilities with POSIX-compliant options are used. For a version of this function that is itself written in POSIX-compliant shell code (for /bin/sh
), see here.
If readlink
is available, it is used (without options) - true on most modern platforms.
Otherwise, the output from ls -l
is parsed, which is the only POSIX-compliant way to determine a symlink's target.
Caveat: this will break if a filename or path contains the literal substring ->
- which is unlikely, however.
(Note that platforms that lack readlink
may still provide other, non-POSIX methods for resolving a symlink; e.g., @Charles Duffy mentions HP-UX's find
utility supporting the %l
format char. with its -printf
primary; in the interest of brevity the function does NOT try to detect such cases.)
An installable utility (script) form of the function below (with additional functionality) can be found as rreadlink
in the npm registry; on Linux and macOS, install it with [sudo] npm install -g rreadlink
; on other platforms (assuming they have bash
), follow the manual installation instructions.
If the argument is a symlink, the ultimate target's canonical path is returned; otherwise, the argument's own canonical path is returned.
#!/usr/bin/env bash
# Helper function.
rreadlink() ( # execute function in a *subshell* to localize the effect of `cd`, ...
local target=$1 fname targetDir readlinkexe=$(command -v readlink) CDPATH=
# Since we'll be using `command` below for a predictable execution
# environment, we make sure that it has its original meaning.
{ \unalias command; \unset -f command; } &>/dev/null
while :; do # Resolve potential symlinks until the ultimate target is found.
[[ -L $target || -e $target ]] || { command printf '%s\n' "$FUNCNAME: ERROR: '$target' does not exist." >&2; return 1; }
command cd "$(command dirname -- "$target")" # Change to target dir; necessary for correct resolution of target path.
fname=$(command basename -- "$target") # Extract filename.
[[ $fname == '/' ]] && fname='' # !! curiously, `basename /` returns '/'
if [[ -L $fname ]]; then
# Extract [next] target path, which is defined
# relative to the symlink's own directory.
if [[ -n $readlinkexe ]]; then # Use `readlink`.
target=$("$readlinkexe" -- "$fname")
else # `readlink` utility not available.
# Parse `ls -l` output, which, unfortunately, is the only POSIX-compliant
# way to determine a symlink's target. Hypothetically, this can break with
# filenames containig literal ' -> ' and embedded newlines.
target=$(command ls -l -- "$fname")
target=${target#* -> }
fi
continue # Resolve [next] symlink target.
fi
break # Ultimate target reached.
done
targetDir=$(command pwd -P) # Get canonical dir. path
# Output the ultimate target's canonical path.
# Note that we manually resolve paths ending in /. and /.. to make sure we
# have a normalized path.
if [[ $fname == '.' ]]; then
command printf '%s\n' "${targetDir%/}"
elif [[ $fname == '..' ]]; then
# Caveat: something like /var/.. will resolve to /private (assuming
# /var@ -> /private/var), i.e. the '..' is applied AFTER canonicalization.
command printf '%s\n' "$(command dirname -- "${targetDir}")"
else
command printf '%s\n' "${targetDir%/}/$fname"
fi
)
# Determine ultimate script dir. using the helper function.
# Note that the helper function returns a canonical path.
scriptDir=$(dirname -- "$(rreadlink "$BASH_SOURCE")")
After you run MySQL Shell and you have seen following:
mysql-js>
Firstly, you should:
mysql-js>\sql
Secondly:
mysql-sql>\connect username@servername (root@localhost)
And finally:
Enter password:*********
Use YAML files for properties, this supports properties as an array.
Quick glance about YAML:
A superset of JSON, it can do everything JSON can + more
On >=2.x, you can do
db.listCollections()
On 1.x you can do
db.getCollectionNames()
This answer is not for DevOps/ system admin guys, but for them who are using IDE like eclipse and facing invalid LOC header (bad signature)
issue.
You can force update the maven dependencies, as follows:
You have fallen victim to the most common of errors in Makefiles. You always need to put a Tab at the beginning of each command. You've put spaces before the $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
and @rm -f $(PROGRAMS) *.o core
lines. If you replace them with a Tab, you'll be fine.
However, this error doesn't lead to a "No rule to make target ..." error. That probably means your issue lies beyond your Makefile. Have you checked this is the correct Makefile, as in the one you want to be specifying your commands? Try explicitly passing it as a parameter to make, make -f Makefile
and let us know what happens.
Like this:
{{ data.title | slice:0:20 }}
And if you want the ellipsis, here's a workaround
{{ data.title | slice:0:20 }}...
For ssh
you can use sshpass
: sshpass -p yourpassphrase ssh user@host
.
You just need to download sshpass first :)
$ apt-get install sshpass
$ sshpass -p 'password' ssh username@server
What I usually do is supply the path to the executable explicitly:
EXE=./bin/
...
test all:
$(EXE)x
I also use this technique to run non-native binaries under an emulator like QEMU if I'm cross compiling:
EXE = qemu-mips ./bin/
If make is using the sh shell, this should work:
test all:
PATH=bin:$PATH x
http://www.verypdf.com/app/pdf-font-extractor/pdf-font-extracting-tool.html IMO easiest way to extract fonts (Windows).
I have build such kind of application using approximatively the same approach except :
UIImage
but instead draw the image in the layer when zooming is 1. Those tiles will be released automatically when memory warnings are issued.Whenever the user start zooming, I acquire the CGPDFPage
and render it using the appropriate CTM. The code in - (void)drawLayer: (CALayer*)layer inContext: (CGContextRef) context
is like :
CGAffineTransform currentCTM = CGContextGetCTM(context);
if (currentCTM.a == 1.0 && baseImage) {
//Calculate ideal scale
CGFloat scaleForWidth = baseImage.size.width/self.bounds.size.width;
CGFloat scaleForHeight = baseImage.size.height/self.bounds.size.height;
CGFloat imageScaleFactor = MAX(scaleForWidth, scaleForHeight);
CGSize imageSize = CGSizeMake(baseImage.size.width/imageScaleFactor, baseImage.size.height/imageScaleFactor);
CGRect imageRect = CGRectMake((self.bounds.size.width-imageSize.width)/2, (self.bounds.size.height-imageSize.height)/2, imageSize.width, imageSize.height);
CGContextDrawImage(context, imageRect, [baseImage CGImage]);
} else {
@synchronized(issue) {
CGPDFPageRef pdfPage = CGPDFDocumentGetPage(issue.pdfDoc, pageIndex+1);
pdfToPageTransform = CGPDFPageGetDrawingTransform(pdfPage, kCGPDFMediaBox, layer.bounds, 0, true);
CGContextConcatCTM(context, pdfToPageTransform);
CGContextDrawPDFPage(context, pdfPage);
}
}
issue is the object containg the CGPDFDocumentRef
. I synchronize the part where I access the pdfDoc
property because I release it and recreate it when receiving memoryWarnings. It seems that the CGPDFDocumentRef
object do some internal caching that I did not find how to get rid of.
You can use >>
to print in another file.
echo "hello" >> logfile.txt
The DragListView lib does this really neat with very nice support for custom animations such as elevation animations. It is also still maintained and updated on a regular basis.
Here is how you use it:
1: Add the lib to gradle first
dependencies {
compile 'com.github.woxthebox:draglistview:1.2.1'
}
2: Add list from xml
<com.woxthebox.draglistview.DragListView
android:id="@+id/draglistview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
3: Set the drag listener
mDragListView.setDragListListener(new DragListView.DragListListener() {
@Override
public void onItemDragStarted(int position) {
}
@Override
public void onItemDragEnded(int fromPosition, int toPosition) {
}
});
4: Create an adapter overridden from DragItemAdapter
public class ItemAdapter extends DragItemAdapter<Pair<Long, String>, ItemAdapter.ViewHolder>
public ItemAdapter(ArrayList<Pair<Long, String>> list, int layoutId, int grabHandleId, boolean dragOnLongPress) {
super(dragOnLongPress);
mLayoutId = layoutId;
mGrabHandleId = grabHandleId;
setHasStableIds(true);
setItemList(list);
}
5: Implement a viewholder that extends from DragItemAdapter.ViewHolder
public class ViewHolder extends DragItemAdapter.ViewHolder {
public TextView mText;
public ViewHolder(final View itemView) {
super(itemView, mGrabHandleId);
mText = (TextView) itemView.findViewById(R.id.text);
}
@Override
public void onItemClicked(View view) {
}
@Override
public boolean onItemLongClicked(View view) {
return true;
}
}
For more detailed info go to https://github.com/woxblom/DragListView
Calling preventDefault
on touchmove
while you're actively scrolling is not working in Chrome. To prevent performance issues, you cannot interrupt a scroll.
Try to call preventDefault()
from touchstart
and everything should be ok.
jquery - Get the value in an input text box
<script type="text/javascript">
jQuery(document).ready(function(){
var classValues = jQuery(".cart tr").find("td.product-name").text();
classValues = classValues.replace(/[_\W]+/g, " ")
jQuery('input[name=your-p-name]').val(classValues);
//alert(classValues);
});
</script>
You have the annotation in the wrong place - it needs to be on the class, not the field. i.e:
@JsonInclude(Include.NON_NULL) //or Include.NON_EMPTY, if that fits your use case
public static class Request {
// ...
}
As noted in comments, in versions below 2.x the syntax for this annotation is:
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL) // or JsonSerialize.Inclusion.NON_EMPTY
The other option is to configure the ObjectMapper
directly, simply by calling
mapper.setSerializationInclusion(Include.NON_NULL);
(for the record, I think the popularity of this answer is an indication that this annotation should be applicable on a field-by-field basis, @fasterxml)
Normally there are two ways of initializing variables, 1) using the sess.run(tf.global_variables_initializer())
as the previous answers noted; 2) the load the graph from checkpoint.
You can do like this:
sess = tf.Session(config=config)
saver = tf.train.Saver(max_to_keep=3)
try:
saver.restore(sess, tf.train.latest_checkpoint(FLAGS.model_dir))
# start from the latest checkpoint, the sess will be initialized
# by the variables in the latest checkpoint
except ValueError:
# train from scratch
init = tf.global_variables_initializer()
sess.run(init)
And the third method is to use the tf.train.Supervisor. The session will be
Create a session on 'master', recovering or initializing the model as needed, or wait for a session to be ready.
sv = tf.train.Supervisor([parameters])
sess = sv.prepare_or_wait_for_session()
All even numbers divided by 2 will result in an integer
$number = 4;
if(is_int($number/2))
{
echo("Integer");
}
else
{
echo("Not Integer");
}
From APUE, Section 5.14 :
char good_template[] = "/tmp/dirXXXXXX"; /* right way */
char *bad_template = "/tmp/dirXXXXXX"; /* wrong way*/
... For the first template, the name is allocated on the stack, because we use an array variable. For the second name, however, we use a pointer. In this case, only the memory for the pointer itself resides on the stack; the compiler arranges for the string to be stored in the read-only segment of the executable. When the
mkstemp
function tries to modify the string, a segmentation fault occurs.
The quoted text matches @Ciro Santilli 's explanation.
requests
does not handle parsing XML responses, no. XML responses are much more complex in nature than JSON responses, how you'd serialize XML data into Python structures is not nearly as straightforward.
Python comes with built-in XML parsers. I recommend you use the ElementTree API:
import requests
from xml.etree import ElementTree
response = requests.get(url)
tree = ElementTree.fromstring(response.content)
or, if the response is particularly large, use an incremental approach:
response = requests.get(url, stream=True)
# if the server sent a Gzip or Deflate compressed response, decompress
# as we read the raw stream:
response.raw.decode_content = True
events = ElementTree.iterparse(response.raw)
for event, elem in events:
# do something with `elem`
The external lxml project builds on the same API to give you more features and power still.
You should use a sticky footer solution such as this one :
* {
margin: 0;
}
html, body {
height: 100%;
}
.wrapper {
min-height: 100%;
height: auto !important;
height: 100%;
margin: 0 auto -142px; /* the bottom margin is the negative value of the footer's height */
}
.footer, .push {
height: 142px; /* .push must be the same height as .footer */
}
There are others like this;
* {margin:0;padding:0;}
/* must declare 0 margins on everything, also for main layout components use padding, not
vertical margins (top and bottom) to add spacing, else those margins get added to total height
and your footer gets pushed down a bit more, creating vertical scroll bars in the browser */
html, body, #wrap {height: 100%;}
body > #wrap {height: auto; min-height: 100%;}
#main {padding-bottom: 150px;} /* must be same height as the footer */
#footer {position: relative;
margin-top: -150px; /* negative value of footer height */
height: 150px;
clear:both;}
/* CLEAR FIX*/
.clearfix:after {content: ".";
display: block;
height: 0;
clear: both;
visibility: hidden;}
.clearfix {display: inline-block;}
/* Hides from IE-mac \*/
* html .clearfix { height: 1%;}
.clearfix {display: block;}
with the html:
<div id="wrap">
<div id="main" class="clearfix">
</div>
</div>
<div id="footer">
</div>
Try this:
Environment.Is64BitOperatingSystem
Environment.Is64BitProcess
Logging to stdout
and rotating file
with different levels and formats:
import logging
import logging.handlers
import sys
if __name__ == "__main__":
# Change root logger level from WARNING (default) to NOTSET in order for all messages to be delegated.
logging.getLogger().setLevel(logging.NOTSET)
# Add stdout handler, with level INFO
console = logging.StreamHandler(sys.stdout)
console.setLevel(logging.INFO)
formater = logging.Formatter('%(name)-13s: %(levelname)-8s %(message)s')
console.setFormatter(formater)
logging.getLogger().addHandler(console)
# Add file rotating handler, with level DEBUG
rotatingHandler = logging.handlers.RotatingFileHandler(filename='rotating.log', maxBytes=1000, backupCount=5)
rotatingHandler.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
rotatingHandler.setFormatter(formatter)
logging.getLogger().addHandler(rotatingHandler)
log = logging.getLogger("app." + __name__)
log.debug('Debug message, should only appear in the file.')
log.info('Info message, should appear in file and stdout.')
log.warning('Warning message, should appear in file and stdout.')
log.error('Error message, should appear in file and stdout.')
I had the same issue when upgrading from Tomcat 7 to 8: a continuous large flood of log warnings about cache.
Add this within the Context
xml element of your $CATALINA_BASE/conf/context.xml
:
<!-- The default value is 10240 kbytes, even when not added to context.xml.
So increase it high enough, until the problem disappears, for example set it to
a value 5 times as high: 51200. -->
<Resources cacheMaxSize="51200" />
So the default is 10240
(10 mbyte), so set a size higher than this. Than tune for optimum settings where the warnings disappear.
Note that the warnings may come back under higher traffic situations.
The problem is caused by Tomcat being unable to reach its target cache size due to cache entries that are less than the TTL of those entries. So Tomcat didn't have enough cache entries that it could expire, because they were too fresh, so it couldn't free enough cache and thus outputs warnings.
The problem didn't appear in Tomcat 7 because Tomcat 7 simply didn't output warnings in this situation. (Causing you and me to use poor cache settings without being notified.)
The problem appears when receiving a relative large amount of HTTP requests for resources (usually static) in a relative short time period compared to the size and TTL of the cache. If the cache is reaching its maximum (10mb by default) with more than 95% of its size with fresh cache entries (fresh means less than less than 5 seconds in cache), than you will get a warning message for each webResource that Tomcat tries to load in the cache.
Use JMX if you need to tune cacheMaxSize on a running server without rebooting it.
The quickest fix would be to completely disable cache: <Resources cachingAllowed="false" />
, but that's suboptimal, so increase cacheMaxSize as I just described.
A WebSource is a file or directory in a web application. For performance reasons, Tomcat can cache WebSources. The maximum of the static resource cache (all resources in total) is by default 10240 kbyte (10 mbyte). A webResource is loaded into the cache when the webResource is requested (for example when loading a static image), it's then called a cache entry. Every cache entry has a TTL (time to live), which is the time that the cache entry is allowed to stay in the cache. When the TTL expires, the cache entry is eligible to be removed from the cache. The default value of the cacheTTL is 5000 milliseconds (5 seconds).
There is more to tell about caching, but that is irrelevant for the problem.
The following code from the Cache class shows the caching policy in detail:
152 // Content will not be cached but we still need metadata size
153 long delta = cacheEntry.getSize();
154 size.addAndGet(delta);
156 if (size.get() > maxSize) {
157 // Process resources unordered for speed. Trades cache
158 // efficiency (younger entries may be evicted before older
159 // ones) for speed since this is on the critical path for
160 // request processing
161 long targetSize =
162 maxSize * (100 - TARGET_FREE_PERCENT_GET) / 100;
163 long newSize = evict(
164 targetSize, resourceCache.values().iterator());
165 if (newSize > maxSize) {
166 // Unable to create sufficient space for this resource
167 // Remove it from the cache
168 removeCacheEntry(path);
169 log.warn(sm.getString("cache.addFail", path));
170 }
171 }
When loading a webResource, the code calculates the new size of the cache. If the calculated size is larger than the default maximum size, than one or more cached entries have to be removed, otherwise the new size will exceed the maximum. So the code will calculate a "targetSize", which is the size the cache wants to stay under (as an optimum), which is by default 95% of the maximum. In order to reach this targetSize, entries have to be removed/evicted from the cache. This is done using the following code:
215 private long evict(long targetSize, Iterator<CachedResource> iter) {
217 long now = System.currentTimeMillis();
219 long newSize = size.get();
221 while (newSize > targetSize && iter.hasNext()) {
222 CachedResource resource = iter.next();
224 // Don't expire anything that has been checked within the TTL
225 if (resource.getNextCheck() > now) {
226 continue;
227 }
229 // Remove the entry from the cache
230 removeCacheEntry(resource.getWebappPath());
232 newSize = size.get();
233 }
235 return newSize;
236 }
So a cache entry is removed when its TTL is expired and the targetSize hasn't been reached yet.
After the attempt to free cache by evicting cache entries, the code will do:
165 if (newSize > maxSize) {
166 // Unable to create sufficient space for this resource
167 // Remove it from the cache
168 removeCacheEntry(path);
169 log.warn(sm.getString("cache.addFail", path));
170 }
So if after the attempt to free cache, the size still exceeds the maximum, it will show the warning message about being unable to free:
cache.addFail=Unable to add the resource at [{0}] to the cache for web application [{1}] because there was insufficient free space available after evicting expired cache entries - consider increasing the maximum size of the cache
So as the warning message says, the problem is
insufficient free space available after evicting expired cache entries - consider increasing the maximum size of the cache
If your web application loads a lot of uncached webResources (about maximum of cache, by default 10mb) within a short time (5 seconds), then you'll get the warning.
The confusing part is that Tomcat 7 didn't show the warning. This is simply caused by this Tomcat 7 code:
1606 // Add new entry to cache
1607 synchronized (cache) {
1608 // Check cache size, and remove elements if too big
1609 if ((cache.lookup(name) == null) && cache.allocate(entry.size)) {
1610 cache.load(entry);
1611 }
1612 }
combined with:
231 while (toFree > 0) {
232 if (attempts == maxAllocateIterations) {
233 // Give up, no changes are made to the current cache
234 return false;
235 }
So Tomcat 7 simply doesn't output any warning at all when it's unable to free cache, whereas Tomcat 8 will output a warning.
So if you are using Tomcat 8 with the same default caching configuration as Tomcat 7, and you got warnings in Tomcat 8, than your (and mine) caching settings of Tomcat 7 were performing poorly without warning.
There are multiple solutions:
As described here: http://tomcat.apache.org/tomcat-8.0-doc/config/resources.html
By adding <Resources cacheMaxSize="XXXXX" />
within the Context
element in $CATALINA_BASE/conf/context.xml
, where "XXXXX" stands for an increased cache size, specified in kbytes. The default is 10240 (10 mbyte), so set a size higher than this.
You'll have to tune for optimum settings. Note that the problem may come back when you suddenly have an increase in traffic/resource requests.
To avoid having to restart the server every time you want to try a new cache size, you can change it without restarting by using JMX.
To enable JMX, add this to $CATALINA_BASE/conf/server.xml
within the Server
element:
<Listener className="org.apache.catalina.mbeans.JmxRemoteLifecycleListener" rmiRegistryPortPlatform="6767" rmiServerPortPlatform="6768" />
and download catalina-jmx-remote.jar
from https://tomcat.apache.org/download-80.cgi and put it in $CATALINA_HOME/lib
.
Then use jConsole (shipped by default with the Java JDK) to connect over JMX to the server and look through the settings for settings to increase the cache size while the server is running. Changes in these settings should take affect immediately.
Lower the cacheTtl
value by something lower than 5000 milliseconds and tune for optimal settings.
For example: <Resources cacheTtl="2000" />
This comes effectively down to having and filling a cache in ram without using it.
Configure logging to disable the logger for org.apache.catalina.webresources.Cache
.
For more info about logging in Tomcat: http://tomcat.apache.org/tomcat-8.0-doc/logging.html
You can disable the cache by setting cachingAllowed
to false
.
<Resources cachingAllowed="false" />
Although I can remember that in a beta version of Tomcat 8, I was using JMX to disable the cache. (Not sure why exactly, but there may be a problem with disabling the cache via server.xml.)
If the starting cell of the range and of the key is static, the solution can be very simple:
Range("A3").Select
Range(Selection, Selection.End(xlToRight)).Select
Range(Selection, Selection.End(xlDown)).Select
Selection.Sort key1:=Range("B3", Range("B3").End(xlDown)), _
order1:=xlAscending, Header:=xlNo
Chang your application level build.gradle file's:
implementation 'com.android.support:appcompat-v7:23.1.0'
to
implementation 'com.android.support:appcompat-v7:23.0.1'
Since state isn't tightly coupled with component instance in functional components, previous state cannot be reached in useEffect
without saving it first, for instance, with useRef
. This also means that state update was possibly incorrectly implemented in wrong place because previous state is available inside setState
updater function.
This is a good use case for useReducer
which provides Redux-like store and allows to implement respective pattern. State updates are performed explicitly, so there's no need to figure out which state property is updated; this is already clear from dispatched action.
Here's an example what it may look like:
function reducer({ sendAmount, receiveAmount, rate }, action) {
switch (action.type) {
case "sendAmount":
sendAmount = action.payload;
return {
sendAmount,
receiveAmount: sendAmount * rate,
rate
};
case "receiveAmount":
receiveAmount = action.payload;
return {
sendAmount: receiveAmount / rate,
receiveAmount,
rate
};
case "rate":
rate = action.payload;
return {
sendAmount: receiveAmount ? receiveAmount / rate : sendAmount,
receiveAmount: sendAmount ? sendAmount * rate : receiveAmount,
rate
};
default:
throw new Error();
}
}
function handleChange(e) {
const { name, value } = e.target;
dispatch({
type: name,
payload: value
});
}
...
const [state, dispatch] = useReducer(reducer, {
rate: 2,
sendAmount: 0,
receiveAmount: 0
});
...
The accepted solution does not work when there are multiple different timezones in a Series. It throws ValueError: Tz-aware datetime.datetime cannot be converted to datetime64 unless utc=True
The solution is to use the apply
method.
Please see the examples below:
# Let's have a series `a` with different multiple timezones.
> a
0 2019-10-04 16:30:00+02:00
1 2019-10-07 16:00:00-04:00
2 2019-09-24 08:30:00-07:00
Name: localized, dtype: object
> a.iloc[0]
Timestamp('2019-10-04 16:30:00+0200', tz='Europe/Amsterdam')
# trying the accepted solution
> a.dt.tz_localize(None)
ValueError: Tz-aware datetime.datetime cannot be converted to datetime64 unless utc=True
# Make it tz-naive. This is the solution:
> a.apply(lambda x:x.tz_localize(None))
0 2019-10-04 16:30:00
1 2019-10-07 16:00:00
2 2019-09-24 08:30:00
Name: localized, dtype: datetime64[ns]
# a.tz_convert() also does not work with multiple timezones, but this works:
> a.apply(lambda x:x.tz_convert('America/Los_Angeles'))
0 2019-10-04 07:30:00-07:00
1 2019-10-07 13:00:00-07:00
2 2019-09-24 08:30:00-07:00
Name: localized, dtype: datetime64[ns, America/Los_Angeles]
You can define a method in spec_helper.rb that sends a message both to Rails.logger.info and to puts and use that for debugging:
def log_test(message)
Rails.logger.info(message)
puts message
end
There is now a beta available of Google Maps KML Importing Utility.
It is part of the Google Maps Android API Utility Library. As documented it allows loading KML files from streams
KmlLayer layer = new KmlLayer(getMap(), kmlInputStream, getApplicationContext());
or local resources
KmlLayer layer = new KmlLayer(getMap(), R.raw.kmlFile, getApplicationContext());
After you have created a KmlLayer, call addLayerToMap() to add the imported data onto the map.
layer.addLayerToMap();
New to python so I don't know if this is advisable, but it works great for not re-writing boilerplate.
Your project must have an init.py so it can be loaded as a module
# Put this in your module's __init__.py
import logging.config
import sys
# I used this dictionary test, you would put:
# logging.config.fileConfig('logging.conf')
# The "" entry in loggers is the root logger, tutorials always
# use "root" but I can't get that to work
logging.config.dictConfig({
"version": 1,
"formatters": {
"default": {
"format": "%(asctime)s %(levelname)s %(name)s %(message)s"
},
},
"handlers": {
"console": {
"level": 'DEBUG',
"class": "logging.StreamHandler",
"stream": "ext://sys.stdout"
}
},
"loggers": {
"": {
"level": "DEBUG",
"handlers": ["console"]
}
}
})
def logger():
# Get the name from the caller of this function
return logging.getLogger(sys._getframe(1).f_globals['__name__'])
sys._getframe(1)
suggestion comes from here
Then to use your logger in any other file:
from [your module name here] import logger
logger().debug("FOOOOOOOOO!!!")
Caveats:
import [your module]
won't work:
python -m [your module name].[your filename without .py]
__main__
, but any solution using __name__
will have that issue.std::string var = "sometext" + somevar + "sometext" + somevar;
This doesn't work because the additions are performed left-to-right and "sometext"
(the first one) is just a const char *
. It has no operator+
to call. The simplest fix is this:
std::string var = std::string("sometext") + somevar + "sometext" + somevar;
Now, the first parameter in the left-to-right list of +
operations is a std::string
, which has an operator+(const char *)
. That operator produces a string, which makes the rest of the chain work.
You can also make all the operations be on var
, which is a std::string
and so has all the necessary operators:
var = "sometext";
var += somevar;
var += "sometext";
var += somevar;
How about this ? Example illusrated using a file:
f = open('abc.log','r')
content = f.readlines()
for line in content:
m = re.search(r"\[(.*?)\]", line)
print m.group(1)
Hope this helps:
Magic regex : \[(.*?)\]
Explanation:
\[
: [
is a meta char and needs to be escaped if you want to match it literally.
(.*?)
: match everything in a non-greedy way and capture it.
\]
: ]
is a meta char and needs to be escaped if you want to match it literally.
Platform.runLater works to prevent execution until initialization is complete. In this case, i want to refresh a list view every time I resize the window width.
Platform.runLater(() -> {
((Stage) listView.getScene().getWindow()).widthProperty().addListener((obs, oldVal, newVal) -> {
listView.refresh();
});
});
in your case
Platform.runLater(()->{
((Stage)myPane.getScene().getWindow()).setOn*whatIwant*(...);
});
Like it's already mentioned, I would highly recommend using regular expression (in System.Text) to get this kind of job done.
In combo with a solid tool like RegexBuddy, you are looking at handling any complex text record parsing situations, as well as getting results quickly. The tool makes it real easy.
Hope that helps.
In linear regression, the outcome (dependent variable) is continuous. It can have any one of an infinite number of possible values. In logistic regression, the outcome (dependent variable) has only a limited number of possible values.
For instance, if X contains the area in square feet of houses, and Y contains the corresponding sale price of those houses, you could use linear regression to predict selling price as a function of house size. While the possible selling price may not actually be any, there are so many possible values that a linear regression model would be chosen.
If, instead, you wanted to predict, based on size, whether a house would sell for more than $200K, you would use logistic regression. The possible outputs are either Yes, the house will sell for more than $200K, or No, the house will not.
It's a new feature called Modules or "semantic import". There's more info in the WWDC 2013 videos for Session 205 and 404. It's kind of a better implementation of the pre-compiled headers. You can use modules with any of the system frameworks in iOS 7 and Mavericks. Modules are a packaging together of the framework executable and its headers and are touted as being safer and more efficient than #import
.
One of the big advantages of using @import
is that you don't need to add the framework in the project settings, it's done automatically. That means that you can skip the step where you click the plus button and search for the framework (golden toolbox), then move it to the "Frameworks" group. It will save many developers from the cryptic "Linker error" messages.
You don't actually need to use the @import
keyword. If you opt-in to using modules, all #import
and #include
directives are mapped to use @import
automatically. That means that you don't have to change your source code (or the source code of libraries that you download from elsewhere). Supposedly using modules improves the build performance too, especially if you haven't been using PCHs well or if your project has many small source files.
Modules are pre-built for most Apple frameworks (UIKit, MapKit, GameKit, etc). You can use them with frameworks you create yourself: they are created automatically if you create a Swift framework in Xcode, and you can manually create a ".modulemap" file yourself for any Apple or 3rd-party library.
You can use code-completion to see the list of available frameworks:
Modules are enabled by default in new projects in Xcode 5. To enable them in an older project, go into your project build settings, search for "Modules" and set "Enable Modules" to "YES". The "Link Frameworks" should be "YES" too:
You have to be using Xcode 5 and the iOS 7 or Mavericks SDK, but you can still release for older OSs (say iOS 4.3 or whatever). Modules don't change how your code is built or any of the source code.
From the WWDC slides:
- Imports complete semantic description of a framework
- Doesn't need to parse the headers
- Better way to import a framework’s interface
- Loads binary representation
- More flexible than precompiled headers
- Immune to effects of local macro definitions (e.g.
#define readonly 0x01
)- Enabled for new projects by default
To explicitly use modules:
Replace #import <Cocoa/Cocoa.h>
with @import Cocoa;
You can also import just one header with this notation:
@import iAd.ADBannerView;
The submodules autocomplete for you in Xcode.
iFrames CAN be FULLY responsive while keeping their aspect ratio with a little CSS technique called the Intrinsic Ratio Technique. I wrote a blog post addressing this question specifically: https://benmarshall.me/responsive-iframes/
This gist is:
.intrinsic-container {_x000D_
position: relative;_x000D_
height: 0;_x000D_
overflow: hidden;_x000D_
}_x000D_
_x000D_
_x000D_
/* 16x9 Aspect Ratio */_x000D_
_x000D_
.intrinsic-container-16x9 {_x000D_
padding-bottom: 56.25%;_x000D_
}_x000D_
_x000D_
_x000D_
/* 4x3 Aspect Ratio */_x000D_
_x000D_
.intrinsic-container-4x3 {_x000D_
padding-bottom: 75%;_x000D_
}_x000D_
_x000D_
.intrinsic-container iframe {_x000D_
position: absolute;_x000D_
top: 0;_x000D_
left: 0;_x000D_
width: 100%;_x000D_
height: 100%;_x000D_
}
_x000D_
<div class="intrinsic-container intrinsic-container-16x9">_x000D_
<iframe src="//www.youtube.com/embed/KMYrIi_Mt8A" allowfullscreen></iframe>_x000D_
</div>
_x000D_
BOOM, fully responsive!
I also had to do this myself. I did it via the --parents argument for cp:
find SOURCEPATH -name filename*.txt -exec cp --parents {} DESTPATH \;
Using a background image, you need to absolutely specify the dimensions. This can be a significant problem if you don't actually know them in advance or cannot determine them.
A big problem with <img />
is overlays. What if I want an CSS inner shadow on my image (box-shadow:inset 0 0 5px rgb(0,0,0,.5)
)? In this case, since <img />
can't have child elements, you need to use positioning and add empty elements which equates to useless markup.
In conclusion, it's quite situational.
following should be your right solution
ren somefile.txt somefile_%time:~0,2%%time:~3,2%-%DATE:/=%.txt
Both of the options you provided are the same. Both of them will still point to the same object in memory and have the same array values. You should treat the state object as immutable as you said, however you need to re-create the array so its pointing to a new object, set the new item, then reset the state. Example:
onChange(event){
var newArray = this.state.arr.slice();
newArray.push("new value");
this.setState({arr:newArray})
}
I found an easy way to render this out... simply declare a dynamic object and assign the first item within the dynamic object to be your collection class...This example assumes you're using Newtonsoft.Json
private class YourModelClass
{
public string firstName { get; set; }
public string lastName { get; set; }
}
var collection = new List<YourModelClass>();
var collectionWrapper = new {
myRoot = collection
};
var output = JsonConvert.SerializeObject(collectionWrapper);
What you should end up with is something like this:
{"myRoot":[{"firstName":"John", "lastName": "Citizen"}, {...}]}
You can do it by in one query by stringing together the individual LIKEs with ORs:
SELECT * FROM tablename
WHERE column LIKE 'M510%'
OR column LIKE 'M615%'
OR column LIKE 'M515%'
OR column LIKE 'M612%';
Just be aware that things like LIKE and per-row functions don't always scale that well. If your table is likely to grow large, you may want to consider adding another column to your table to store the first four characters of the field independently.
This duplicates data but you can guarantee it stays consistent by using insert and update triggers. Then put an index on that new column and your queries become:
SELECT * FROM tablename WHERE newcolumn IN ('M510','M615','M515','M612');
This moves the cost-of-calculation to the point where it's necessary (when the data changes), not every single time you read it. In fact, you could go even further and have your new column as a boolean indicating that it was one of the four special types (if that group of specials will change infrequently). Then the query would be an even faster:
SELECT * FROM tablename WHERE is_special = 1;
This tradeoff of storage requirement for speed is a useful trick for larger databases - generally, disk space is cheap, CPU grunt is precious, and data is read far more often than written. By moving the cost-of-calculation to the write stage, you amortise the cost across all the reads.
My suggestion would be to get the book Programming From Ground Up:
http://nongnu.askapache.com/pgubook/ProgrammingGroundUp-1-0-booksize.pdf
That is a very good starting point for getting into assembler programming under linux and it explains a lot of the basics you need to understand to get started.
The following is equivalent to your second code block:
var f = function () {
//Some logic here...
};
var fr = f;
fr(pars);
If you want to actually pass a reference to a function to some other function, you can do something like this:
function fiz(x, y, z) {
return x + y + z;
}
// elsewhere...
function foo(fn, p, q, r) {
return function () {
return fn(p, q, r);
}
}
// finally...
f = foo(fiz, 1, 2, 3);
f(); // returns 6
You're almost certainly better off using a framework for this sort of thing, though.
I have been stucked a while on the same problem, which I eventually resolved.
My problem: I could not execute any push. I could check & see my remote (using git remote -v
), but when I executed git push origin master
, it returned : Permission denied (publickey). fatal: Could not read from remote repository.
and so.
How I solved it :
ssh-keygen -t rsa
. Entering a name for the key file (when asked) was useless.ssh-add /Users/federico/.ssh/id_rsa
, which successfully returned Identity added: /Users/myname/.ssh/id_rsa (/Users/myname/.ssh/id_rsa)
ssh-add -l
command worked / seemed useful (after having ran the previous steps), it successfully returned my key. The last step shows you where to check your public key on your GitHub page. And this command will help you check all your keys : ls -al ~/.ssh
.Then the push command eventually worked !
I hope this will help ! Best luck to all.
If you are using TOAD, you will need to download the 32-bit version of the Oracle Client Tools.
Since the Client Tools are different on a per-processor architecture basis, you probably need to install versions.
If you are using Ipython Notebook (Jupyter). You can use HTML
from IPython.core.display import HTML
display(HTML(df.to_html()))
You can specify properties according profiles in one application.properties(yml) like here. Then
mvn clean spring-boot:run -Dspring.profiles.active=dev
should run it correct. It works for me
Install these 2 packages
<packages>
<package id="ExcelDataReader" version="3.3.0" targetFramework="net451" />
<package id="ExcelDataReader.DataSet" version="3.3.0" targetFramework="net451" />
</packages>
Helper function
using ExcelDataReader;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ExcelToCsv
{
public class ExcelFileHelper
{
public static bool SaveAsCsv(string excelFilePath, string destinationCsvFilePath)
{
using (var stream = new FileStream(excelFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
IExcelDataReader reader = null;
if (excelFilePath.EndsWith(".xls"))
{
reader = ExcelReaderFactory.CreateBinaryReader(stream);
}
else if (excelFilePath.EndsWith(".xlsx"))
{
reader = ExcelReaderFactory.CreateOpenXmlReader(stream);
}
if (reader == null)
return false;
var ds = reader.AsDataSet(new ExcelDataSetConfiguration()
{
ConfigureDataTable = (tableReader) => new ExcelDataTableConfiguration()
{
UseHeaderRow = false
}
});
var csvContent = string.Empty;
int row_no = 0;
while (row_no < ds.Tables[0].Rows.Count)
{
var arr = new List<string>();
for (int i = 0; i < ds.Tables[0].Columns.Count; i++)
{
arr.Add(ds.Tables[0].Rows[row_no][i].ToString());
}
row_no++;
csvContent += string.Join(",", arr) + "\n";
}
StreamWriter csv = new StreamWriter(destinationCsvFilePath, false);
csv.Write(csvContent);
csv.Close();
return true;
}
}
}
}
Usage :
var excelFilePath = Console.ReadLine();
string output = Path.ChangeExtension(excelFilePath, ".csv");
ExcelFileHelper.SaveAsCsv(excelFilePath, output);
The answers here took the OP's question too literally. How can these answers be expanded into a scenario where there are MANY child elements, not just a single <a>
tag? Here's one way.
Let's say you have a photo gallery with a blacked out background and the photos centered in the browser. When you click the black background (but not anything inside of it) you want the overlay to close.
Here's some possible HTML:
<div class="gallery" style="background: black">
<div class="contents"> <!-- Let's say this div is 50% wide and centered -->
<h1>Awesome Photos</h1>
<img src="img1.jpg"><br>
<img src="img2.jpg"><br>
<img src="img3.jpg"><br>
<img src="img4.jpg"><br>
<img src="img5.jpg">
</div>
</div>
And here's how the JavaScript would work:
$('.gallery').click(
function()
{
$(this).hide();
}
);
$('.gallery > .contents').click(
function(e) {
e.stopPropagation();
}
);
This will stop the click events from elements inside .contents
from every research .gallery
so the gallery will close only when you click in the faded black background area, but not when you click in the content area. This can be applied to many different scenarios.
Input. We will start with the text of the input shown in the question since the question did not provide the csv input:
Lines <- "Dates Bajaj_close Hero_close
3/14/2013 1854.8 1669.1
3/15/2013 1850.3 1684.45
3/18/2013 1812.1 1690.5
3/19/2013 1835.9 1645.6
3/20/2013 1840 1651.15
3/21/2013 1755.3 1623.3
3/22/2013 1820.65 1659.6
3/25/2013 1802.5 1617.7
3/26/2013 1801.25 1571.85
3/28/2013 1799.55 1542"
zoo. "ts"
class series normally do not represent date indexes but we can create a zoo series that does (see zoo package):
library(zoo)
z <- read.zoo(text = Lines, header = TRUE, format = "%m/%d/%Y")
Alternately, if you have already read this into a data frame DF
then it could be converted to zoo as shown on the second line below:
DF <- read.table(text = Lines, header = TRUE)
z <- read.zoo(DF, format = "%m/%d/%Y")
In either case above z
ia a zoo series with a "Date"
class time index. One could also create the zoo series, zz
, which uses 1, 2, 3, ... as the time index:
zz <- z
time(zz) <- seq_along(time(zz))
ts. Either of these could be converted to a "ts"
class series:
as.ts(z)
as.ts(zz)
The first has a time index which is the number of days since the Epoch (January 1, 1970) and will have NAs for missing days and the second will have 1, 2, 3, ... as the time index and no NAs.
Monthly series. Typically "ts"
series are used for monthly, quarterly or yearly series. Thus if we were to aggregate the input into months we could reasonably represent it as a "ts"
series:
z.m <- as.zooreg(aggregate(z, as.yearmon, mean), freq = 12)
as.ts(z.m)
I'm making an assumption that you mean not checked. I don't have a C# compiler handy but:
if (checkbox1.Checked && !checkbox2.Checked)
{
}
else if (!checkbox1.Checked && checkbox2.Checked)
{
}
I appreciate everyone saying use tags, but really you need to extend the UIButton class and simply add the object there..
Tags are a hopeless way round this. Extend the UIButton like this (in Swift 4)
import UIKit
class PassableUIButton: UIButton{
var params: Dictionary<String, Any>
override init(frame: CGRect) {
self.params = [:]
super.init(frame: frame)
}
required init?(coder aDecoder: NSCoder) {
self.params = [:]
super.init(coder: aDecoder)
}
}
then your call may be call (NOTE THE colon ":" in Selector(("webButtonTouched:"))
)
let webButton = PassableUIButton(frame: CGRect(x:310, y:40, width:40, height:40))
webButton.setTitle("Visit",for: .normal)
webButton.addTarget(self, action: #selector(YourViewController.webButtonTouched(_:)), for:.touchUpInside)
webButton.params["myvalue"] = "bob"
then finally catch it all here
@IBAction func webButtonTouched(_ sender: PassableUIButton) {
print(sender.params["myvalue"] ?? "")
}
You do this one time and use it throughout your project (you can even make the child class have a generic "object" and put whatever you like into the button!). Or use the example above to put an inexhaustible number of key/string params into the button.. Really useful for including things like urls, confirm message methodology etc
As an aside, it's important that the SO
community realise this there is an entire generation of bad practice being cut'n'paste round the internet by an alarming number of programmers who don't understand/haven't been taught/missed the point of the concept of object extensions
Fixed positioning will do what you need:
#main
{
position:fixed;
top:0px;
bottom:0px;
left:0px;
right:0px;
}
Just an additional note - if the server runs on a port other than 80 (as might be common on a development/intranet machine) then HTTP_HOST
contains the port, while SERVER_NAME
does not.
$_SERVER['HTTP_HOST'] == 'localhost:8080'
$_SERVER['SERVER_NAME'] == 'localhost'
(At least that's what I've noticed in Apache port-based virtualhosts)
As Mike has noted below, HTTP_HOST
does not contain :443
when running on HTTPS (unless you're running on a non-standard port, which I haven't tested).
ie ---> Tools ----> Internet options -----> Programe ------> Make Defualt
You can try:
<label id ="label_id"></label>
$("#label_id").html('value');
Actually I would advocate .profile
if you need it to work from scripts, and in particular, scripts run by /bin/sh instead of Bash. If this is just for your own private interactive use, .bashrc
is fine, though.
Had the same problem. found some videos on Youtube. So here is an even simpler suggestion. This is all the code you need:
#include <QDebug>
int main(int argc, char *argv[])
{
qDebug() <<"Hello World"<< endl;
return 0;
}
The above code comes from Qt5 Tutorial: Building a simple Console application by
Dominique Thiebaut