As for the inverse, the function is inv(A)
, but I won't recommend using it, since for huge matrices it is very computationally costly and unstable. Instead, you should use an approximation to the inverse, or if you want to solve Ax = b you don't really need A-1.
a = ['1', '1', '1', '1', '1', '1', '2', '2', '2', '2', '7', '7', '7', '10', '10']
print a.count("1")
It's probably optimized heavily at the C level.
Edit: I randomly generated a large list.
In [8]: len(a)
Out[8]: 6339347
In [9]: %timeit a.count("1")
10 loops, best of 3: 86.4 ms per loop
Edit edit: This could be done with collections.Counter
a = Counter(your_list)
print a['1']
Using the same list in my last timing example
In [17]: %timeit Counter(a)['1']
1 loops, best of 3: 1.52 s per loop
My timing is simplistic and conditional on many different factors, but it gives you a good clue as to performance.
Here is some profiling
In [24]: profile.run("a.count('1')")
3 function calls in 0.091 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 0.091 0.091 <string>:1(<module>)
1 0.091 0.091 0.091 0.091 {method 'count' of 'list' objects}
1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Prof
iler' objects}
In [25]: profile.run("b = Counter(a); b['1']")
6339356 function calls in 2.143 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 2.143 2.143 <string>:1(<module>)
2 0.000 0.000 0.000 0.000 _weakrefset.py:68(__contains__)
1 0.000 0.000 0.000 0.000 abc.py:128(__instancecheck__)
1 0.000 0.000 2.143 2.143 collections.py:407(__init__)
1 1.788 1.788 2.143 2.143 collections.py:470(update)
1 0.000 0.000 0.000 0.000 {getattr}
1 0.000 0.000 0.000 0.000 {isinstance}
1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Prof
iler' objects}
6339347 0.356 0.000 0.356 0.000 {method 'get' of 'dict' objects}
I'll add that if you want to read the dimensions, you can do this:
int[][][] a = new int[4][3][2];
System.out.println(a.length); // 4
System.out.println(a[0].length); // 3
System.out.println(a[0][0].length); //2
You can also have jagged arrays, where different rows have different lengths, so a[0].length != a[1].length
.
Here you go with word-wrap on Visual Studio Code.
Not in general but if you are using Github:
For me wget
to the raw url turned out to be the best and easiest way to download one particular file.
Open the file in the browser and click on "Raw" button. Now refresh your browser, copy the url and do a wget
or curl
on it.
wget example:
wget 'https://github.abc.abc.com/raw/abc/folder1/master/folder2/myfile.py?token=DDDDnkl92Kw8829jhXXoxBaVJIYW-h7zks5Vy9I-wA%3D%3D' -O myfile.py
Curl example:
curl 'https://example.com/raw.txt' > savedFile.txt
A clean and easy solution (C#):
static class Utilities {
public static List<T> GetAllControls<T>(this Control container) where T : Control {
List<T> controls = new List<T>();
if (container.Controls.Count > 0) {
controls.AddRange(container.Controls.OfType<T>());
foreach (Control c in container.Controls) {
controls.AddRange(c.GetAllControls<T>());
}
}
return controls;
}
}
Get all textboxes:
List<TextBox> textboxes = myControl.GetAllControls<TextBox>();
Actually, when you use git reset
, you should refer to the commit that you are resetting to; so you would want the db0c078
commit, probably.
An easier version would be git reset --hard HEAD^
, to reset to the previous commit before the current head; that way you don't have to be copying around commit IDs.
Beware when you do any git reset --hard
, as you can lose any uncommitted changes you have. You might want to check git status
to make sure your working copy is clean, or that you do want to blow away any changes that are there.
In addition, instead of HEAD you can use origin/master
as reference, as suggested by @bdonlan in the comments: git reset --hard origin/master
It looks like you need a MySQL server installed, there is install packages on mysql's site, or you can install through macports (I assume from the darwin11 line). I installed mine via ports, and the socket lives in /opt/local/var/run/mysql5/.
Using $rootScope.$broadcast and $scope.$on for a PubSub communication.
Also, see this post: AngularJS – Communicating Between Controllers
have a look at mysql_insert_id()
here the documentation: http://in.php.net/manual/en/function.mysql-insert-id.php
I was playing around with C# code an I accidentally found the solution to your problem haha
This is the code for the Principal view:
`@model dynamic
@Html.Partial("_Partial", Model as IDictionary<string, object>)`
Then in the Partial view:
`@model dynamic
@if (Model != null) {
foreach (var item in Model)
{
<div>@item.text</div>
}
}`
It worked for me, I hope this will help you too!!
let str = "{\"names\": [\"Bob\", \"Tim\", \"Tina\"]}"
let data = str.data(using: String.Encoding.utf8, allowLossyConversion: false)!
do {
let json = try JSONSerialization.jsonObject(with: data, options: []) as! [String: AnyObject]
if let names = json["names"] as? [String]
{
print(names)
}
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
There are more than one way to increment a variable in bash, but what you tried is not correct.
You can use for example arithmetic expansion:
i=$((i+1))
or only:
((i=i+1))
or:
((i+=1))
or even:
((i++))
Or you can use let:
let "i=i+1"
or only:
let "i+=1"
or even:
let "i++"
See also: http://tldp.org/LDP/abs/html/dblparens.html.
If your grep -i does not work then try using tr command to convert the the output of your file to lower case and then pipe it into standard grep with whatever you are looking for. (it sounds complicated but the actual command which I have provided for you is not !).
Notice the tr command does not change the content of your original file, it just converts it just before it feeds it into grep.
1.here is how you can do this on a file
tr '[:upper:]' '[:lower:]' <your_file.txt|grep what_ever_you_are_searching_in_lower_case
2.or in your case if you are just echoing something
echo "ABC"|tr '[:upper:]' '[:lower:]' | grep abc
A very common issue not described yet that front-end coders often run into is the scope that is visible to an inline event handler in the HTML - for example, with
<button onclick="foo()"></button>
The scope of the variables that an on*
attribute can reference must be either:
querySelector
as a standalone variable will point to document.querySelector
; rare)Otherwise, you'll get a ReferenceError when the handler is invoked. So, for example, if the inline handler references a function which is defined inside window.onload
or $(function() {
, the reference will fail, because the inline handler may only reference variables in the global scope, and the function is not global:
window.addEventListener('DOMContentLoaded', () => {_x000D_
function foo() {_x000D_
console.log('foo running');_x000D_
}_x000D_
});
_x000D_
<button onclick="foo()">click</button>
_x000D_
Properties of the document
and properties of the element the handler is attached to may also be referenced as standalone variables inside inline handlers because inline handlers are invoked inside of two with
blocks, one for the document
, one for the element. The scope chain of variables inside these handlers is extremely unintuitive, and a working event handler will probably require a function to be global (and unnecessary global pollution should probably be avoided).
Since the scope chain inside inline handlers is so weird, and since inline handlers require global pollution to work, and since inline handlers sometimes require ugly string escaping when passing arguments, it's probably easier to avoid them. Instead, attach event handlers using Javascript (like with addEventListener
), rather than with HTML markup.
function foo() {_x000D_
console.log('foo running');_x000D_
}_x000D_
document.querySelector('.my-button').addEventListener('click', foo);
_x000D_
<button class="my-button">click</button>
_x000D_
On a different note, unlike normal <script>
tags, which run on the top level, code inside ES6 modules runs in its own private scope. A variable defined at the top of a normal <script>
tag is global, so you can reference it in other <script>
tags, like this:
<script>_x000D_
const foo = 'foo';_x000D_
</script>_x000D_
<script>_x000D_
console.log(foo);_x000D_
</script>
_x000D_
But the top level of an ES6 module is not global. A variable declared at the top of an ES6 module will only be visible inside that module, unless the variable is explicitly export
ed, or unless it's assigned to a property of the global object.
<script type="module">_x000D_
const foo = 'foo';_x000D_
</script>_x000D_
<script>_x000D_
// Can't access foo here, because the other script is a module_x000D_
console.log(typeof foo);_x000D_
</script>
_x000D_
The top level of an ES6 module is similar to that of the inside of an IIFE on the top level in a normal <script>
. The module can reference any variables which are global, and nothing can reference anything inside the module unless the module is explicitly designed for it.
If you guys are looking for a solution for Android, you can use the following code to get the epoch seconds from the timestamp string.
public static long timestampToEpochSeconds(String srcTimestamp) {
long epoch = 0;
try {
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
Instant instant = Instant.parse(srcTimestamp);
epoch = instant.getEpochSecond();
} else {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss.SSSSSS'Z'", Locale.getDefault());
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
Date date = sdf.parse(srcTimestamp);
if (date != null) {
epoch = date.getTime() / 1000;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return epoch;
}
Sample input: 2019-10-15T05:51:31.537979Z
Sample output: 1571128673
Since SHA-1 maps several byte sequences to one, you can't "decrypt" a hash, but in theory you can find collisions: strings that have the same hash.
It seems that breaking a single hash would cost about 2.7 million dollars worth of computer time currently, so your efforts are probably better spent somewhere else.
I used the above command line as follow: update TABLE-NAME set FIELD = replace(FIELD, 'And', 'and'); the purpose was to replace And with and ("A" should be lowercase). The problem is it cannot find the "And" in database, but if I use like "%And%" then it can find it along with many other ands that are part of a word or even the ones that are already lowercase.
Mostly in /usr/local/git
(there are also /etc/paths.d/git
and /etc/manpaths.d/git
items).
I also encountered the same issue. Deleting the app didn't work, but when I tried deleting another app which was the current one's 'parent'(I copied the whole project from the previous app, modified some urls and images, then I clicked 'Run' and saw the unhappy 'could not be verified' dialog). Seems the issue is related to provisioning and code signing and/or some configurations of the project. Very tricky.
if you are developing QGIS plugins then simply
self.dlg.cbo_load_net.currentIndex()
$(".price").each(function(){
total_price += parseFloat($(this).val());
});
please try like this...
Use the random
module: http://docs.python.org/library/random.html
import random
random.sample(set([1, 2, 3, 4, 5, 6]), 2)
This samples the two values without replacement (so the two values are different).
Let's say you have a shiny Foo class. Well you have 3 options:
1) You want to use the method (or attribute) of a class inside the definition of that class:
class Foo(object):
attribute1 = 1 # class attribute (those don't use 'self' in declaration)
def __init__(self):
self.attribute2 = 2 # instance attribute (those are accessible via first
# parameter of the method, usually called 'self'
# which will contain nothing but the instance itself)
def set_attribute3(self, value):
self.attribute3 = value
def sum_1and2(self):
return self.attribute1 + self.attribute2
2) You want to use the method (or attribute) of a class outside the definition of that class
def get_legendary_attribute1():
return Foo.attribute1
def get_legendary_attribute2():
return Foo.attribute2
def get_legendary_attribute1_from(cls):
return cls.attribute1
get_legendary_attribute1() # >>> 1
get_legendary_attribute2() # >>> AttributeError: type object 'Foo' has no attribute 'attribute2'
get_legendary_attribute1_from(Foo) # >>> 1
3) You want to use the method (or attribute) of an instantiated class:
f = Foo()
f.attribute1 # >>> 1
f.attribute2 # >>> 2
f.attribute3 # >>> AttributeError: 'Foo' object has no attribute 'attribute3'
f.set_attribute3(3)
f.attribute3 # >>> 3
In plain English: Get the parent element. Check it's height, and save that value. Then loop through all the child elements and check their individual heights.
This is dirty, but you might get the basic idea: http://jsfiddle.net/VgDgz/
Unfortunately, this is one of the many misnomers in the framework, or at best a violation of SRP.
To use the DateTimePicker for times, set the Format property to either Time or Custom (Use Custom if you want to control the format of the time using the CustomFormat property). Then set the ShowUpDown property to true.
Although a user may set the date and time together manually, they cannot use the GUI to set both.
First take a label. set its visibility to false, then on the DataGridView_CellClick event write this
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
label.Text=dataGridView1.Rows[e.RowIndex].Cells["Your Coloumn name"].Value.ToString();
// then perform your select statement according to that label.
}
//try it it might work for you
I was solving same problem recently. I was designing a write cmdlet for my Subtitle module. I had six different user stories:
I end up in the big frustration because I though that 4 parameters will be enough. Like most of the times, the frustration was pointless because it was my fault. I didn't know enough about parameter sets.
After some research in documentation, I realized where is the problem. With knowledge how the parameter sets should be used, I developed a general and simple approach how to solve this problem. A pencil and a sheet of paper is required but a spreadsheet editor is better:
Example:
The practical example could be seen over here.
BTW: The parameter uniqueness within parameter sets is the reason why the ParameterSetName
property doesn't support [String[]]
. It doesn't really make any sense.
You can also simply use http authentication with Digest (Here some infos if you use Apache httpd, Apache Tomcat, and here an explanation of digest).
With Java, for interesting informations, take a look at :
One technology you should consider is SQLJ - a way to embed SQL statements directly in Java. As a simple example, you might have the following in a file called TestQueries.sqlj:
public class TestQueries
{
public String getUsername(int id)
{
String username;
#sql
{
select username into :username
from users
where pkey = :id
};
return username;
}
}
There is an additional precompile step which takes your .sqlj files and translates them into pure Java - in short, it looks for the special blocks delimited with
#sql
{
...
}
and turns them into JDBC calls. There are several key benefits to using SQLJ:
There are implementations of the translator around for most of the major database vendors, so you should be able to find everything you need easily.
def is_prime(x):
if x < 2:
return False
else:
if x == 2:
return True
else:
for i in range(2, x):
if x % i == 0:
return False
return True
x = int(raw_input("enter a prime number"))
print is_prime(x)
A Simple and an easy way
var cusid_ele = document.getElementsByClassName('custid');
for (var i = 0; i < cusid_ele.length; ++i) {
var item = cusid_ele[i];
item.innerHTML = 'this is value';
}
Here are some libraries that have multiple degrees of tuples for your convenience:
Other libraries have been mentioned to contain at least the Pair
tuple.
Specifically, in the context of functional programming which makes use of a lot of structural typing, rather than nominal typing (as advocated in the accepted answer), those libraries and their tuples come in very handy.
It looks like people answered the first part of your question (use application/json).
For the second part: It is perfectly legal to send query parameters in a HTTP POST Request.
Example:
POST /members?id=1234 HTTP/1.1
Host: www.example.com
Content-Type: application/json
{"email":"[email protected]"}
Query parameters are commonly used in a POST request to refer to an existing resource. The above example would update the email address of an existing member with the id of 1234.
Back in 1967, Edgar Dijkstra wrote an article in a trade magazine about why goto should be eliminated from high level languages to improve code quality. A whole programming paradigm called "structured programming" came out of this, though certainly not everyone agrees that goto automatically means bad code.
The crux of structured programming is essentially that the structure of the code should determine its flow rather than having gotos or breaks or continues to determine flow, wherever possible. Similiarly, having multiple entry and exit points to a loop or function are also discouraged in that paradigm.
Obviously this is not the only programming paradigm, but often it can be easily applied to other paradigms like object oriented programming (ala Java).
Your teachers has probably been taught, and is trying to teach your class that we would best avoid "spaghetti code" by making sure our code is structured, and following the implied rules of structured programming.
While there is nothing inherently "wrong" with an implementation that uses break, some consider it significantly easier to read code where the condition for the loop is explicitly specified within the while() condition, and eliminates some possibilities of being overly tricky. There are definitely pitfalls to using a while(true) condition that seem to pop up frequently in code by novice programmers, such as the risk of accidentally creating an infinite loop, or making code that is hard to read or unnecessarily confusing.
Ironically, exception handling is an area where deviation from structured programming will certainly come up and be expected as you get further into programming in Java.
It is also possible your instructor may have expected you to demonstrate your ability to use a particular loop structure or syntax being taught in that chapter or lesson of your text, and while the code you wrote is functionally equivalent, you may not have been demonstrating the particular skill you were supposed to be learning in that lesson.
In ASP.Net Core anti forgery token is automatically added to forms, so you don't need to add @Html.AntiForgeryToken()
if you use razor form element or if you use IHtmlHelper.BeginForm and if the form's method isn't GET.
It will generate input element for your form similar to this:
<input name="__RequestVerificationToken" type="hidden"
value="CfDJ8HSQ_cdnkvBPo-jales205VCq9ISkg9BilG0VXAiNm3Fl5Lyu_JGpQDA4_CLNvty28w43AL8zjeR86fNALdsR3queTfAogif9ut-Zd-fwo8SAYuT0wmZ5eZUYClvpLfYm4LLIVy6VllbD54UxJ8W6FA">
And when user submits form this token is verified on server side if validation is enabled.
[ValidateAntiForgeryToken]
attribute can be used against actions. Requests made to actions that have this filter applied are blocked unless the request includes a valid antiforgery token.
[AutoValidateAntiforgeryToken]
attribute can be used against controllers. This attribute works identically to the ValidateAntiForgeryToken attribute, except that it doesn't require tokens for requests made using the following HTTP methods:
GET HEAD OPTIONS TRACE
Additional information: docs.microsoft.com/aspnet/core/security/anti-request-forgery
I found the solution to this problem in a "}". I did some changes to my sketch and forgot to check for "}" and I had an extra one. As soon as I deleted it and compiled everything was fine.
KeyPress is only fired by printable characters and is fired after the KeyDown event. Depending on the typing delay settings there can be multiple KeyDown and KeyPress events but only one KeyUp event.
KeyDown
KeyPress
KeyUp
You can add an attribute using ES6 spread operator, e.g.
let myAttr = {'data-attr': 'value'}
and in render method:
<MyComponent {...myAttr} />
There is equally formatDate
const format = 'dd/MM/yyyy';
const myDate = '2019-06-29';
const locale = 'en-US';
const formattedDate = formatDate(myDate, format, locale);
According to the API it takes as param either a date string, a Date object, or a timestamp.
Gotcha: Out of the box, only en-US
is supported.
If you need to add another locale, you need to add it and register it in you app.module, for example for Spanish:
import { registerLocaleData } from '@angular/common';
import localeES from "@angular/common/locales/es";
registerLocaleData(localeES, "es");
Don't forget to add corresponding import:
import { formatDate } from "@angular/common";
Adding a separate answer because it is radically different.
You could use rgba and set the alpha channel low (to get transparency) to make your drop shadow less noticeable.
Try something like this (play with the .5)
-webkit-box-shadow: 0px -4px 7px rbga(230, 230, 230, .5);
-moz-box-shadow: 0px -4px 7px rbga(230, 230, 230, .5);
box-shadow: 0px -4px 7px rbga(230, 230, 230, .5);
Hope this helps!
There are two categories as follows
Core java is a language basics. For example (Data structures, Semantics..etc) https://malalanayake.wordpress.com/category/java/data-structures/
But if you see the Java EE you can see the Sevlet, JSP, JSF all the web technologies and the patterns. https://malalanayake.wordpress.com/2014/10/10/jsp-servlet-scope-variables-and-init-parameters/
Instead of:
void addStudent(person)
{
return;
}
try this:
void addStudent(student person)
{
return;
}
Since you have already declared a structure called 'student' you don't necessarily have to specify so in the function implementation as in:
void addStudent(struct student person)
{
return;
}
The setOnPageChangeListener() method is deprecated. Use addOnPageChangeListener(OnPageChangeListener) instead.
You can use OnPageChangeListener and getting the position inside onPageSelected()
method, this is an example:
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
Log.d(TAG, "my position is : " + position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
Or just use getCurrentItem() to get the real position:
viewPager.getCurrentItem();
With the verify
parameter you can provide a custom certificate authority bundle
requests.get(url, verify=path_to_bundle_file)
From the docs:
You can pass
verify
the path to a CA_BUNDLE file with certificates of trusted CAs. This list of trusted CAs can also be specified through the REQUESTS_CA_BUNDLE environment variable.
Not sure if this is what you mean, but try setting las=1
. Here's an example:
require(grDevices)
tN <- table(Ni <- stats::rpois(100, lambda=5))
r <- barplot(tN, col=rainbow(20), las=1)
That represents the style of axis labels. (0=parallel, 1=all horizontal, 2=all perpendicular to axis, 3=all vertical)
New answer for iTerm2 Build 3.3.4 users:
Step 1: (macOS X) System Preferences > Keyboard > Shortcuts tab > Select Mission Control (left panel) > Uncheck shortcuts that labeled as "Move left a space" and "Move right a space"
Step 2: (iTerm2 Build 3.3.4) Preferences > Profiles > Select * Default (left panel) > Keys tab > Delete both "?->" and "?<-" entries > Set both "Left Option (?) Key:" and "Right Option (?) Key:" to Esc+
No messing around with shell profiles, no messing around with inferior masOS (default) Terminal, no awkwards Esc+F/B, rinse & repeat non-sense.
Done deal!!!
Enjoy this tip, my fellow PROGRAMMERS!
If you happen to be using jQuery, you might want to give this a shot: http://api.jquery.com/category/deferred-object/
It allows you to defer the execution of your callback function until the ajax request (or any async operation) is completed. This can also be used to call a callback once several ajax requests have all completed.
Use fetchAll()
to fetch all rows as an associative array.
$stmt = $pdo->query('SELECT * FROM article');
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
echo json_encode($rows);
When your SQL has parameters:
$stmt = $pdo->prepare('SELECT * FROM article WHERE id=?');
$stmt->execute([1]);
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
echo json_encode($rows);
When you need to rekey the table you can use foreach
loop and build the array manually.
$stmt = $pdo->prepare('SELECT * FROM article WHERE id=?');
$stmt->execute([1]);
$rows = [];
foreach ($stmt as $row) {
$rows[] = [
'newID' => $row['id'],
'Description' => $row['text'],
];
}
echo json_encode($rows);
Use fetch_all()
to fetch all rows as an associative array.
$res = $mysqli->query('SELECT * FROM article');
$rows = $res->fetch_all(MYSQLI_ASSOC);
echo json_encode($rows);
When your SQL has parameters you need to perform prepare/bind/execute/get_result.
$id = 1;
$stmt = $mysqli->prepare('SELECT * FROM article WHERE id=?');
$stmt->bind_param('s', $id); // binding by reference. Only use variables, not literals
$stmt->execute();
$res = $stmt->get_result(); // returns mysqli_result same as mysqli::query()
$rows = $res->fetch_all(MYSQLI_ASSOC);
echo json_encode($rows);
When you need to rekey the table you can use foreach
loop and build the array manually.
$stmt = $mysqli->prepare('SELECT * FROM article WHERE id=?');
$stmt->bind_param('s', $id);
$stmt->execute();
$res = $stmt->get_result();
$rows = [];
foreach ($res as $row) {
$rows[] = [
'newID' => $row['id'],
'Description' => $row['text'],
];
}
echo json_encode($rows);
Please, upgrade as soon as possible to a supported PHP version! Please take it seriously. If you need a solution using the old API, this is how it could be done:
$res = mysql_query("SELECT * FROM article");
$rows = [];
while ($row = mysql_fetch_assoc($res)) {
$rows[] = $row;
}
echo json_encode($rows);
Print lines where the third field is either snow
or snowman
only:
awk '$3~/^snow(man)?$/' file
A lambda
is an anonymous function:
>>> f = lambda: 'foo'
>>> print f()
foo
It is often used in functions such as sorted()
that take a callable as a parameter (often the key
keyword parameter). You could provide an existing function instead of a lambda
there too, as long as it is a callable object.
Take the sorted()
function as an example. It'll return the given iterable in sorted order:
>>> sorted(['Some', 'words', 'sort', 'differently'])
['Some', 'differently', 'sort', 'words']
but that sorts uppercased words before words that are lowercased. Using the key
keyword you can change each entry so it'll be sorted differently. We could lowercase all the words before sorting, for example:
>>> def lowercased(word): return word.lower()
...
>>> lowercased('Some')
'some'
>>> sorted(['Some', 'words', 'sort', 'differently'], key=lowercased)
['differently', 'Some', 'sort', 'words']
We had to create a separate function for that, we could not inline the def lowercased()
line into the sorted()
expression:
>>> sorted(['Some', 'words', 'sort', 'differently'], key=def lowercased(word): return word.lower())
File "<stdin>", line 1
sorted(['Some', 'words', 'sort', 'differently'], key=def lowercased(word): return word.lower())
^
SyntaxError: invalid syntax
A lambda
on the other hand, can be specified directly, inline in the sorted()
expression:
>>> sorted(['Some', 'words', 'sort', 'differently'], key=lambda word: word.lower())
['differently', 'Some', 'sort', 'words']
Lambdas are limited to one expression only, the result of which is the return value.
There are loads of places in the Python library, including built-in functions, that take a callable as keyword or positional argument. There are too many to name here, and they often play a different role.
setInterval
repeats the call, setTimeout
only runs it once.
I had the same issue after installing the 64 bit Oracle client on Windows 7 64 bit. The solution that worked for me:
cd \oracle\product\11.2.0\client_64\BIN
c:\Windows\system32\regsvr32.exe OraOLEDB11.dll
Here is a merged version of the C++ code for the first two answers.
#include <iostream>
#include <string>
using namespace std;
class Animal
{
public:
#ifdef VIRTUAL
virtual string says() { return "??"; }
#else
string says() { return "??"; }
#endif
};
class Dog: public Animal
{
public:
string says() { return "woof"; }
};
string func(Animal *a)
{
return a->says();
}
int main()
{
Animal *a = new Animal();
Dog *d = new Dog();
Animal *ad = d;
cout << "Animal a says\t\t" << a->says() << endl;
cout << "Dog d says\t\t" << d->says() << endl;
cout << "Animal dog ad says\t" << ad->says() << endl;
cout << "func(a) :\t\t" << func(a) << endl;
cout << "func(d) :\t\t" << func(d) << endl;
cout << "func(ad):\t\t" << func(ad)<< endl;
}
Two different results are:
Without #define virtual, it binds at compile time. Animal *ad and func(Animal *) all point to the Animal's says() method.
$ g++ virtual.cpp -o virtual
$ ./virtual
Animal a says ??
Dog d says woof
Animal dog ad says ??
func(a) : ??
func(d) : ??
func(ad): ??
With #define virtual, it binds at run time. Dog *d, Animal *ad and func(Animal *) point/refer to the Dog's says() method as Dog is their object type. Unless [Dog's says() "woof"] method is not defined, it will be the one searched first in the class tree, i.e. derived classes may override methods of their base classes [Animal's says()].
$ g++ virtual.cpp -D VIRTUAL -o virtual
$ ./virtual
Animal a says ??
Dog d says woof
Animal dog ad says woof
func(a) : ??
func(d) : woof
func(ad): woof
It is interesting to note that all class attributes (data and methods) in Python are effectively virtual. Since all objects are dynamically created at runtime, there is no type declaration or a need for keyword virtual. Below is Python's version of code:
class Animal:
def says(self):
return "??"
class Dog(Animal):
def says(self):
return "woof"
def func(a):
return a.says()
if __name__ == "__main__":
a = Animal()
d = Dog()
ad = d # dynamic typing by assignment
print("Animal a says\t\t{}".format(a.says()))
print("Dog d says\t\t{}".format(d.says()))
print("Animal dog ad says\t{}".format(ad.says()))
print("func(a) :\t\t{}".format(func(a)))
print("func(d) :\t\t{}".format(func(d)))
print("func(ad):\t\t{}".format(func(ad)))
The output is:
Animal a says ??
Dog d says woof
Animal dog ad says woof
func(a) : ??
func(d) : woof
func(ad): woof
which is identical to C++'s virtual define. Note that d and ad are two different pointer variables referring/pointing to the same Dog instance. The expression (ad is d) returns True and their values are the same <main.Dog object at 0xb79f72cc>.
You start a thread which runs the static method SumData
. However, SumData
calls SetTextboxText
which isn't static. Thus you need an instance of your form to call SetTextboxText
.
You can change from settings menu (at least from version 1.30.2 and above)...
On Mac, just hit Code > Preferences > Settings.
Then just search for "clear" and check Clear Previous Output.
If you are using asp.net mvc, here is a simple way to access the session.
From a Controller:
{Controller}.ControllerContext.HttpContext.Session["{name}"]
From a View:
<%=Session["{name}"] %>
This is definitely not the best way to access your session variables, but it is a direct route. So use it with caution (preferably during rapid prototyping), and use a Wrapper/Container and OnSessionStart when it becomes appropriate.
HTH
When an element, such as a div
is floated
, its parent container no longer considers its height, i.e.
<div id="main">
<div id="child" style="float:left;height:40px;"> Hi</div>
</div>
The parent container will not be be 40 pixels tall by default. This causes a lot of weird little quirks if you're using these containers to structure layout.
So the clearfix
class that various frameworks use fixes this problem by making the parent container "acknowledge" the contained elements.
Day to day, I normally just use frameworks such as 960gs, Twitter Bootstrap for laying out and not bothering with the exact mechanics.
Can read more here
Check your manifest,Open the file with .xml extension and then all your activities are listed your first activity should have this code enclosed in its tags
<intent-filter>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
or there is another way u can choose from configuration which is drop down list on the left side of run button choose from App from it Hope it will help!!
Here's what we use:
using System;
using System.IO;
namespace crmachine.CommonClasses
{
public static class CRMPath
{
public static bool IsDirectory(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
string reason;
if (!IsValidPathString(path, out reason))
{
throw new ArgumentException(reason);
}
if (!(Directory.Exists(path) || File.Exists(path)))
{
throw new InvalidOperationException(string.Format("Could not find a part of the path '{0}'",path));
}
return (new System.IO.FileInfo(path).Attributes & FileAttributes.Directory) == FileAttributes.Directory;
}
public static bool IsValidPathString(string pathStringToTest, out string reasonForError)
{
reasonForError = "";
if (string.IsNullOrWhiteSpace(pathStringToTest))
{
reasonForError = "Path is Null or Whitespace.";
return false;
}
if (pathStringToTest.Length > CRMConst.MAXPATH) // MAXPATH == 260
{
reasonForError = "Length of path exceeds MAXPATH.";
return false;
}
if (PathContainsInvalidCharacters(pathStringToTest))
{
reasonForError = "Path contains invalid path characters.";
return false;
}
if (pathStringToTest == ":")
{
reasonForError = "Path consists of only a volume designator.";
return false;
}
if (pathStringToTest[0] == ':')
{
reasonForError = "Path begins with a volume designator.";
return false;
}
if (pathStringToTest.Contains(":") && pathStringToTest.IndexOf(':') != 1)
{
reasonForError = "Path contains a volume designator that is not part of a drive label.";
return false;
}
return true;
}
public static bool PathContainsInvalidCharacters(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
bool containedInvalidCharacters = false;
for (int i = 0; i < path.Length; i++)
{
int n = path[i];
if (
(n == 0x22) || // "
(n == 0x3c) || // <
(n == 0x3e) || // >
(n == 0x7c) || // |
(n < 0x20) // the control characters
)
{
containedInvalidCharacters = true;
}
}
return containedInvalidCharacters;
}
public static bool FilenameContainsInvalidCharacters(string filename)
{
if (filename == null)
{
throw new ArgumentNullException("filename");
}
bool containedInvalidCharacters = false;
for (int i = 0; i < filename.Length; i++)
{
int n = filename[i];
if (
(n == 0x22) || // "
(n == 0x3c) || // <
(n == 0x3e) || // >
(n == 0x7c) || // |
(n == 0x3a) || // :
(n == 0x2a) || // *
(n == 0x3f) || // ?
(n == 0x5c) || // \
(n == 0x2f) || // /
(n < 0x20) // the control characters
)
{
containedInvalidCharacters = true;
}
}
return containedInvalidCharacters;
}
}
}
Another simple way is to use a tuple:
// Declare a tuple type
let x: [string, number];
// Initialize it
x = ["hello", 10];
// Access elements
console.log("First: " + x["0"] + " Second: " + x["1"]);
Output:
First: hello Second: 10
You can use Expressions windows: while debugging, menu window -> Show View -> Expressions, then it has place to type variables of which you need to see contents
Keep in mind that you probably shouldn't be using either one of those methods. Microsoft's Anti-Cross Site Scripting Library includes replacements for HttpUtility.UrlEncode
and HttpUtility.HtmlEncode
that are both more standards-compliant, and more secure. As a bonus, you get a JavaScriptEncode
method as well.
It sounds like you hit the "Insert" key .. in most applications this results in a fat (solid rectangle) cursor being displayed, as your screenshot suggests. This indicates that you are in overwrite mode rather than the default insert mode.
Just hit the "insert" key on your keyboard once more... it's usually near the 'delete' (not backspace), scroll lock and 'Print Screen' (often above the cursor keys in a full size keyboard.) This will switch back to insert mode and turn your cursor into a vertical line rather than a rectangle.
Could it be that you are passing the data through get, not post?
<form method="get" ..>
..
</form>
These days, ECMAScript 6 (ECMA-262) is "in the house". Use Number.isInteger(x)
to ask the question you want to ask with respect to the type of x:
js> var x = 3
js> Number.isInteger(x)
true
js> var y = 3.1
js> Number.isInteger(y)
false
try this :
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
targetSdkVersion 26
}
}
compile 'com.android.support:appcompat-v7:25.1.0'
It has worked for me
Here is some code I've wrote to automatically turn URL's into links and automatically embed any video urls from youtube. I made it for a chat room I'm working on and it works pretty well. I'm sure it will work just fine for any other purpose as well like a blog for instance.
All you have to do is call the function "autolink()" and pass it the string to be parsed.
For example include the function below and then echo this code.
`
echo '<div id="chat_message">'.autolink($string).'</div>';
/****************Function to include****************/
<?php
function autolink($string){
// force http: on www.
$string = str_ireplace( "www.", "http://www.", $string );
// eliminate duplicates after force
$string = str_ireplace( "http://http://www.", "http://www.", $string );
$string = str_ireplace( "https://http://www.", "https://www.", $string );
// The Regular Expression filter
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
// Check if there is a url in the text
$m = preg_match_all($reg_exUrl, $string, $match);
if ($m) {
$links=$match[0];
for ($j=0;$j<$m;$j++) {
if(substr($links[$j], 0, 18) == 'http://www.youtube'){
$string=str_replace($links[$j],'<a href="'.$links[$j].'" rel="nofollow" target="_blank">'.$links[$j].'</a>',$string).'<br /><iframe title="YouTube video player" class="youtube-player" type="text/html" width="320" height="185" src="http://www.youtube.com/embed/'.substr($links[$j], -11).'" frameborder="0" allowFullScreen></iframe><br />';
}else{
$string=str_replace($links[$j],'<a href="'.$links[$j].'" rel="nofollow" target="_blank">'.$links[$j].'</a>',$string);
}
}
}
return ($string);
}
?>
`
The .browser call has been removed in jquery 1.9 have a look at http://jquery.com/upgrade-guide/1.9/ for more details.
I think you would like to learn ajax
first, try this: Ajax Tutorial
If you want to know how ajax works, it is not a good way to use jQuery directly. I support to learn the native way to send a ajax request to the server, see something about XMLHttpRequest
:
var xhr = new XMLHttpReuqest();
xhr.open("GET", "http://some.com");
xhr.onreadystatechange = handler; // do something here...
xhr.send();
"s" is not a "char*", it's a "char[4]". And so, "&s" is not a "char**", but actually "a pointer to an array of 4 characater". Your compiler may treat "&s" as if you had written "&s[0]", which is roughly the same thing, but is a "char*".
When you write "char** p = &s;" you are trying to say "I want p to be set to the address of the thing which currently points to "asd". But currently there is nothing which points to "asd". There is just an array which holds "asd";
char s[] = "asd";
char *p = &s[0]; // alternately you could use the shorthand char*p = s;
char **pp = &p;
pixels = np.array(pixels)
in this line you reassign pixels
. So, it may not a list anyhow. Though pixels
is not a list it has no attributes append
. Does it make sense?
If anyone is coming here looking to do this with Font Awesome Icons (like I was) view here: https://fontawesome.com/how-to-use/on-the-web/styling/icons-in-a-list
<ul class="fa-ul">
<li><i class="fa-li fa fa-check-square"></i>List icons</li>
<li><i class="fa-li fa fa-check-square"></i>can be used</li>
<li><i class="fa-li fa fa-spinner fa-spin"></i>as bullets</li>
<li><i class="fa-li fa fa-square"></i>in lists</li>
</ul>
The fa-ul
and fa-li
classes easily replace default bullets in unordered lists.
Below is the information about screen sizes. These details are taken from the apple website
You need some JS to achieve this by simply adding alert('Your message')
within your PHP code.
See example below
<?php
//my other php code here
function function_alert() {
// Display the alert box; note the Js tags within echo, it performs the magic
echo "<script>alert('Your message Here');</script>";
}
?>
when you visit your browser using the route supposed to triger your function_alert
, you will see the alert box with your message displayed on your screen.
Read more at https://www.geeksforgeeks.org/how-to-pop-an-alert-message-box-using-php/
Go to the folder where Python is installed, e.g., in my case (Mac OS) it is installed in the Applications folder with the folder name 'Python 3.6'. Now double click on 'Install Certificates.command'. You will no longer face this error.
For those not running a mac, or having a different setup and can't find this file, the file merely runs:
pip install --upgrade certifi
Hope that helps someone :)
First you need to get the counts for each category, i.e. how many Bads and Goods and so on are there for each group (Food, Music, People). This would be done like so:
raw <- read.csv("http://pastebin.com/raw.php?i=L8cEKcxS",sep=",")
raw[,2]<-factor(raw[,2],levels=c("Very Bad","Bad","Good","Very Good"),ordered=FALSE)
raw[,3]<-factor(raw[,3],levels=c("Very Bad","Bad","Good","Very Good"),ordered=FALSE)
raw[,4]<-factor(raw[,4],levels=c("Very Bad","Bad","Good","Very Good"),ordered=FALSE)
raw=raw[,c(2,3,4)] # getting rid of the "people" variable as I see no use for it
freq=table(col(raw), as.matrix(raw)) # get the counts of each factor level
Then you need to create a data frame out of it, melt it and plot it:
Names=c("Food","Music","People") # create list of names
data=data.frame(cbind(freq),Names) # combine them into a data frame
data=data[,c(5,3,1,2,4)] # sort columns
# melt the data frame for plotting
data.m <- melt(data, id.vars='Names')
# plot everything
ggplot(data.m, aes(Names, value)) +
geom_bar(aes(fill = variable), position = "dodge", stat="identity")
Is this what you're after?
To clarify a little bit, in ggplot multiple grouping bar you had a data frame that looked like this:
> head(df)
ID Type Annee X1PCE X2PCE X3PCE X4PCE X5PCE X6PCE
1 1 A 1980 450 338 154 36 13 9
2 2 A 2000 288 407 212 54 16 23
3 3 A 2020 196 434 246 68 19 36
4 4 B 1980 111 326 441 90 21 11
5 5 B 2000 63 298 443 133 42 21
6 6 B 2020 36 257 462 162 55 30
Since you have numerical values in columns 4-9, which would later be plotted on the y axis, this can be easily transformed with reshape
and plotted.
For our current data set, we needed something similar, so we used freq=table(col(raw), as.matrix(raw))
to get this:
> data
Names Very.Bad Bad Good Very.Good
1 Food 7 6 5 2
2 Music 5 5 7 3
3 People 6 3 7 4
Just imagine you have Very.Bad
, Bad
, Good
and so on instead of X1PCE
, X2PCE
, X3PCE
. See the similarity? But we needed to create such structure first. Hence the freq=table(col(raw), as.matrix(raw))
.
zsh has a builtin command emulate
which can emulate different shells by setting the appropriate options, although csh will never be fully emulated.
emulate bash
perform commands
emulate -R zsh
The -R flag restores all the options to their default values for that shell.
See: zsh manual
When you try to execute a program in unix (one with the executable bit set), the operating system will look at the first few bytes of the file. These form the so-called "magic number", which can be used to decide the format of the program and how to execute it.
#!
corresponds to the magic number 0x2321 (look it up in an ascii table). When the system sees that the magic number, it knows that it is dealing with a text script and reads until the next \n
(there is a limit, but it escapes me atm). Having identified the interpreter (the first argument after the shebang) it will call the interpreter.
Other files also have magic numbers. Try looking at a bitmap (.BMP) file via less
and you will see the first two characters are BM
. This magic number denotes that the file is indeed a bitmap.
simple is the best and works in every version.
if a>10:
value="b"
else:
value="c"
info registers
show registers.display $esp
continue display esp registers in gdb command line.layout regs
continue show registers, with TUI mode.Usefull script which you can delete all data in all tables of a database , replace tt with you databse name :
declare @tablename nvarchar(100)
declare c1 cursor for
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_CATALOG='tt' AND TABLE_TYPE='BASE TABLE'
open c1
fetch next from c1 into @tablename
while @@FETCH_STATUS = 0
begin
print @t1
exec('alter table ' + @tablename + ' nocheck constraint all')
exec('delete from ' + @tablename)
exec ('alter table ' + @tablename + ' check constraint all')
fetch next from c1 into @tablename
end
close c1
DEALLOCATE c1
Firebase.remove()
like probably most Firebase methods is asynchronous, thus you have to listen to events to know when something happened:
parent = ref.parent()
parent.on('child_removed', function (snapshot) {
// removed!
})
ref.remove()
According to Firebase docs it should work even if you lose network connection. If you want to know when the change has been actually synchronized with Firebase servers, you can pass a callback function to Firebase.remove
method:
ref.remove(function (error) {
if (!error) {
// removed!
}
}
If antak's answer:
git fetch [email protected]:<THEIR USERNAME>/<REPO>.git <THEIR BRANCH>:<OUR NAME FOR BRANCH>
gives you:
Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
Then (following Przemek D's advice) use
git fetch https://github.com/<THEIR USERNAME>/<REPO>.git <THEIR BRANCH>:<OUR NAME FOR BRANCH>
I think that using colnames
and rownames
makes the most sense; here's why.
Using names
has several disadvantages. You have to remember that it means "column names", and it only works with data frame, so you'll need to call colnames
whenever you use matrices. By calling colnames
, you only have to remember one function. Finally, if you look at the code for colnames
, you will see that it calls names
in the case of a data frame anyway, so the output is identical.
rownames
and row.names
return the same values for data frame and matrices; the only difference that I have spotted is that where there aren't any names, rownames
will print "NULL" (as does colnames
), but row.names
returns it invisibly. Since there isn't much to choose between the two functions, rownames
wins on the grounds of aesthetics, since it pairs more prettily withcolnames
. (Also, for the lazy programmer, you save a character of typing.)
calling select
will result is lazy
evaluation: for example:
val df1 = df.select("col1")
val df2 = df1.filter("col1 == 3")
both above statements create lazy path that will be executed when you call action on that df
, such as show
, collect
etc.
val df3 = df2.collect()
use .explain
at the end of your transformation to follow its plan
here is more detailed info Transformations and Actions
open -n -a Terminal
and you can pass the target directory as parameter
open -n -a Terminal /Users
You can also add underscore.js to your project and will be able to do it in one line:
_.map($("input[name='category_ids[]']:checked"), function(el){return $(el).val()})
You have to define a table alias for a derived table in SQL Server:
SELECT x.*
INTO [NEW_TABLE]
FROM (SELECT * FROM TABLE1
UNION
SELECT * FROM TABLE2) x
"x" is the table alias in this example.
You can simply subtract two dates. You have to cast it first, using to_date
:
select to_date('2000-01-01', 'yyyy-MM-dd')
- to_date('2000-01-02', 'yyyy-MM-dd')
datediff
from dual
;
The result is in days, to the difference of these two dates is -1
(you could swap the two dates if you like). If you like to have it in hours, just multiply the result with 24.
You set an element's id by setting its corresponding property:
myPara.id = ID;
Here is how we got out of the infinite routing loop and still used $state.go
instead of $location.path
if('401' !== toState.name) {
if (principal.isIdentityResolved()) authorization.authorize();
}
Instead of the -f
of make
you might want to use the -C <path>
option. This first changes the to the path '<path>
', and then calles make
there.
Example:
clean:
rm -f ./*~ ./gmon.out ./core $(SRC_DIR)/*~ $(OBJ_DIR)/*.o
rm -f ../svn-commit.tmp~
rm -f $(BIN_DIR)/$(PROJECT)
$(MAKE) -C gtest-1.4.0/make clean
Know that there is an X-XSRF-TOKEN cookie that is set for convenience. Framework like Angular and others set it by default. Check this in the doc https://laravel.com/docs/5.7/csrf#csrf-x-xsrf-token You may like to use it.
The best way is to use the meta, case the cookies are deactivated.
var xsrfToken = decodeURIComponent(readCookie('XSRF-TOKEN'));
if (xsrfToken) {
$.ajaxSetup({
headers: {
'X-XSRF-TOKEN': xsrfToken
}
});
} else console.error('....');
Here the recommended meta way (you can put the field any way, but meta is quiet nice):
$.ajaxSetup({
headers: {
'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
}
});
Note the use of decodeURIComponent()
, it's decode from uri format which is used to store the cookie. [otherwise you will get an invalid payload exception in laravel].
Here the section about the csrf cookie in the doc to check : https://laravel.com/docs/5.7/csrf#csrf-x-csrf-token
Also here how laravel (bootstrap.js) is setting it for axios by default:
let token = document.head.querySelector('meta[name="csrf-token"]');
if (token) {
window.axios.defaults.headers.common['X-CSRF-TOKEN'] = token.content;
} else {
console.error('CSRF token not found: https://laravel.com/docs/csrf#csrf-x-csrf-token');
}
you can go check resources/js/bootstrap.js
.
And here read cookie function:
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
}
return null;
}
The ImportError message is a bit misleading because of the reference to Win32, whereas the problem was simply the opencv DLLs were not found.
This problem was solved by adding the path the opencv binaries to the Windows PATH environment variable (as an example, on my computer this path is : C:\opencv\build\bin\Release).
Under Windows only: You may try to use ini_set()
functionDocs for the SMTP
Docs and smtp_port
Docs settings:
ini_set('SMTP', 'mysmtphost');
ini_set('smtp_port', 25);
This is due to IFS (Internal Field Separator) variable which contains newline.
$ cat xx1
1
2
$ A=`cat xx1`
$ echo $A
1 2
$ echo "|$IFS|"
|
|
A workaround is to reset IFS to not contain the newline, temporarily:
$ IFSBAK=$IFS
$ IFS=" "
$ A=`cat xx1` # Can use $() as well
$ echo $A
1
2
$ IFS=$IFSBAK
To REVERT this horrible change for IFS:
IFS=$IFSBAK
The Visual Studio debugger comes with four standard visualizers. These are the text, HTML, and XML visualizers, all of which work on string objects, and the dataset visualizer, which works for DataSet, DataView, and DataTable objects.
To use it, break into your code, mouse over your DataSet, expand the quick watch, view the Tables, expand that, then view Table[0] (for example). You will see something like {Table1} in the quick watch, but notice that there is also a magnifying glass icon. Click on that icon and your DataTable will open up in a grid view.
Late Entry.
Following is a succinct implementation using Java8 streams, a one liner:
String foobarspam = "foobarspam";
AtomicInteger splitCounter = new AtomicInteger(0);
Collection<String> splittedStrings = foobarspam
.chars()
.mapToObj(_char -> String.valueOf((char)_char))
.collect(Collectors.groupingBy(stringChar -> splitCounter.getAndIncrement() / 3
,Collectors.joining()))
.values();
Output:
[foo, bar, spa, m]
Open your build.gradle file and make sure you have versionCode
and versionName
inside defaultConfig
element. If not, add them. Refer to this link for more details.
Ned Batchelder has posted a short script that will unmarshal a .pyc file and disassemble any code objects within, so you'll be able to see the Python bytecode.
It looks like with newer versions of Python, you'll need to comment out the lines that set modtime
and print it (but don't comment the line that sets moddate
).
Turning that back into Python source would be somewhat more difficult, although theoretically possible. I assume all these programs that work for older versions of Python do that.
I had something simular: I have an attribute picture in my model, this contains the location of the file in the Storage folder. The image must be returned base64 encoded
//Add extra attribute
protected $attributes = ['picture_data'];
//Make it available in the json response
protected $appends = ['picture_data'];
//implement the attribute
public function getPictureDataAttribute()
{
$file = Storage::get($this->picture);
$type = Storage::mimeType($this->picture);
return "data:" . $type . ";base64," . base64_encode($file);
}
Another alternative way to achieve the same is to use the tail calls. But, we don’t have anything like that in JavaScript. So generally, the goto is accomplished in JS using the below two keywords. break and continue, reference: Goto Statement in JavaScript
Here is an example:
var number = 0;
start_position: while(true) {
document.write("Anything you want to print");
number++;
if(number < 100) continue start_position;
break;
}
I had win10 SDK and I only had to do retarget and then I stopped getting this error. The idea was that the project needs to upgrade its target Windows SDK.
A trick would be to include your piece of code into ()
like this:
(wd <- getwd())
which means that the current working directory is assigned to wd
and then printed.
Disabled Select
in angular 9.
one thing keep in mind disabled work with boolean
values
in this example, I am using the (change)
event with the select
option if the country is not selected region will be disabled.
find.component.ts file
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'app-find',
templateUrl: './find.component.html',
styleUrls: ['./find.component.css']
})
export class FindComponent implements OnInit {
isCountrySelected:boolean;
constructor() { }
//onchange event disabled false
onChangeCountry(id:number){
this.isCountrySelected = false;
}
ngOnInit(): void {
//initially disabled true
this.isCountrySelected = true;
}
}
find.component.html
//Country select option
<select class="form-control" (change)="onChangeCountry()" value="Choose Country">
<option value="">Choose a Country</option>
<option value="US">United States</option>
</select>
//region disabled till country is not selected
<select class="form-control" [disabled]="isCountrySelected">
<option value="">Choose a Region</option>
<option value="">Any regions.</option>
</select>
AWS released a new Service to query S3 buckets with SQL: Amazon Athena https://aws.amazon.com/athena/
A different approach:
The vrapper plugin emulates vim
inside the Eclipse editor. One of its features is visual block
mode which works fine inside Eclipse.
It is by default mapped to Ctrl-V
which interferes with the paste command in Eclipse. You can either remap the visual block
mode to a different shortcut, or remap the paste
command to a different key. I chose the latter: remapped the paste
command to Ctrl-Shift-V
to match my terminal's behavior.
in javascript, object properties can be accessed with . operator or with associative array indexing using []. ie. object.property
is equivalent to object["property"]
this should do the trick
var smth = mydata.list[0]["points.bean.pointsBase"][0].time;
pip has a --no-dependencies
switch. You should use that.
For more information, run pip install -h
, where you'll see this line:
--no-deps, --no-dependencies
Ignore package dependencies
In swift 4 : by overriding method
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let storyboard = UIStoryboard(name : "Main", bundle: nil)
let next vc = storyboard.instantiateViewController(withIdentifier: "nextvcIdentifier") as! NextViewController
self.navigationController?.pushViewController(prayerVC, animated: true)
}
Solution using gulp-uglify
, gulp-concat
and gulp-sourcemaps
. This is from a project I'm working on.
gulp.task('scripts', function () {
return gulp.src(scripts, {base: '.'})
.pipe(plumber(plumberOptions))
.pipe(sourcemaps.init({
loadMaps: false,
debug: debug,
}))
.pipe(gulpif(debug, wrapper({
header: fileHeader,
})))
.pipe(concat('all_the_things.js', {
newLine:'\n;' // the newline is needed in case the file ends with a line comment, the semi-colon is needed if the last statement wasn't terminated
}))
.pipe(uglify({
output: { // http://lisperator.net/uglifyjs/codegen
beautify: debug,
comments: debug ? true : /^!|\b(copyright|license)\b|@(preserve|license|cc_on)\b/i,
},
compress: { // http://lisperator.net/uglifyjs/compress, http://davidwalsh.name/compress-uglify
sequences: !debug,
booleans: !debug,
conditionals: !debug,
hoist_funs: false,
hoist_vars: debug,
warnings: debug,
},
mangle: !debug,
outSourceMap: true,
basePath: 'www',
sourceRoot: '/'
}))
.pipe(sourcemaps.write('.', {
includeContent: true,
sourceRoot: '/',
}))
.pipe(plumber.stop())
.pipe(gulp.dest('www/js'))
});
This combines and compresses all your scripts
, puts them into a file called all_the_things.js
. The file will end with a special line
//# sourceMappingURL=all_the_things.js.map
Which tells your browser to look for that map file, which it also writes out.
This is the only way it worked for me, with smooth scrolling transition:
$('html, body').animate({
scrollTop: $('#containerDiv').offset().top,
}, 250);
Even though you asked for wait()
and notify()
specifically, I feel that this quote is still important enough:
Josh Bloch, Effective Java 2nd Edition, Item 69: Prefer concurrency utilities to wait
and notify
(emphasis his):
Given the difficulty of using
wait
andnotify
correctly, you should use the higher-level concurrency utilities instead [...] usingwait
andnotify
directly is like programming in "concurrency assembly language", as compared to the higher-level language provided byjava.util.concurrent
. There is seldom, if ever, reason to usewait
andnotify
in new code.
A web service endpoint is the URL that another program would use to communicate with your program. To see the WSDL you add ?wsdl
to the web service endpoint URL.
Web services are for program-to-program interaction, while web pages are for program-to-human interaction.
So:
Endpoint is: http://www.blah.com/myproject/webservice/webmethod
Therefore,
WSDL is: http://www.blah.com/myproject/webservice/webmethod?wsdl
To expand further on the elements of a WSDL, I always find it helpful to compare them to code:
A WSDL has 2 portions (physical & abstract).
Physical Portion:
Definitions - variables - ex: myVar, x, y, etc.
Types - data types - ex: int, double, String, myObjectType
Operations - methods/functions - ex: myMethod(), myFunction(), etc.
Messages - method/function input parameters & return types
Porttypes - classes (i.e. they are a container for operations) - ex: MyClass{}, etc.
Abstract Portion:
Binding - these connect to the porttypes and define the chosen protocol for communicating with this web service. - a protocol is a form of communication (so text/SMS, vs. phone vs. email, etc.).
Service - this lists the address where another program can find your web service (i.e. your endpoint).
Let's face it: php does NOT have a simple out of the box function to properly handle every array sort scenario.
This routine is intuitive, which means faster debugging and maintenance:
// automatic population of array
$tempArray = array();
$annotations = array();
// ... some code
// SQL $sql retrieves result array $result
// $row[0] is the ID, but is populated out of order (comes from
// multiple selects populating various dimensions for the same DATE
// for example
while($row = mysql_fetch_array($result)) {
$needle = $row[0];
arrayIndexes($needle); // create a parallel array with IDs only
$annotations[$needle]['someDimension'] = $row[1]; // whatever
}
asort($tempArray);
foreach ($tempArray as $arrayKey) {
$dataInOrder = $annotations[$arrayKey]['someDimension'];
// .... more code
}
function arrayIndexes ($needle) {
global $tempArray;
if (!in_array($needle,$tempArray)) {
array_push($tempArray,$needle);
}
}
Apache Commons allows:
String myString = IOUtils.toString(myInputStream, "UTF-8");
Of course, you could choose other character encodings besides UTF-8.
Also see: (documentation)
Here's a slightly changed version of this answer that:
To use it:
~/bin/watch
chmod 700 ~/bin/watch
in a terminal to make it executable.watch 1 echo "hi there"
~/bin/watch
#!/bin/bash
function show_help()
{
echo ""
echo "usage: watch [sleep duration in seconds] [command]"
echo ""
echo "e.g. To cat a file every second, run the following"
echo ""
echo " watch 1 cat /tmp/it.txt"
exit;
}
function show_help_if_required()
{
if [ "$1" == "help" ]
then
show_help
fi
if [ -z "$1" ]
then
show_help
fi
}
function require_numeric_value()
{
REG_EX='^[0-9]+$'
if ! [[ $1 =~ $REG_EX ]] ; then
show_help
fi
}
show_help_if_required $1
require_numeric_value $1
DURATION=$1
shift
while :; do
clear
echo "Updating every $DURATION seconds. Last updated $(date)"
bash -c "$*"
sleep $DURATION
done
Apart from the fact that unlike DISTINCT
, GROUP BY
allows for aggregating data per group (which has been mentioned by many other answers), the most important difference in my opinion is the fact that the two operations "happen" at two very different steps in the logical order of operations that are executed in a SELECT
statement.
Here are the most important operations:
FROM
(including JOIN
, APPLY
, etc.)WHERE
GROUP BY
(can remove duplicates)HAVING
SELECT
DISTINCT
(can remove duplicates)UNION
, INTERSECT
, EXCEPT
(can remove duplicates)ORDER BY
OFFSET
LIMIT
As you can see, the logical order of each operation influences what can be done with it and how it influences subsequent operations. In particular, the fact that the GROUP BY
operation "happens before" the SELECT
operation (the projection) means that:
An example where not depending on the projection is useful is if you want to calculate window functions on distinct values:
SELECT rating, row_number() OVER (ORDER BY rating) AS rn
FROM film
GROUP BY rating
When run against the Sakila database, this yields:
rating rn
-----------
G 1
NC-17 2
PG 3
PG-13 4
R 5
The same couldn't be achieved with DISTINCT
easily:
SELECT DISTINCT rating, row_number() OVER (ORDER BY rating) AS rn
FROM film
That query is "wrong" and yields something like:
rating rn
------------
G 1
G 2
G 3
...
G 178
NC-17 179
NC-17 180
...
This is not what we wanted. The DISTINCT
operation "happens after" the projection, so we can no longer remove DISTINCT
ratings because the window function was already calculated and projected. In order to use DISTINCT
, we'd have to nest that part of the query:
SELECT rating, row_number() OVER (ORDER BY rating) AS rn
FROM (
SELECT DISTINCT rating FROM film
) f
Side-note: In this particular case, we could also use DENSE_RANK()
SELECT DISTINCT rating, dense_rank() OVER (ORDER BY rating) AS rn
FROM film
One of SQL's drawbacks is its verbosity at times. For the same reason as what we've seen before (namely the logical order of operations), we cannot "easily" group by something we're projecting.
This is invalid SQL:
SELECT first_name || ' ' || last_name AS name
FROM customer
GROUP BY name
This is valid (repeating the expression)
SELECT first_name || ' ' || last_name AS name
FROM customer
GROUP BY first_name || ' ' || last_name
This is valid, too (nesting the expression)
SELECT name
FROM (
SELECT first_name || ' ' || last_name AS name
FROM customer
) c
GROUP BY name
This is working for me
Podfile:
platform :ios, '9.0'
use_frameworks!
target '<Your Target Name>' do
pod 'SwiftGifOrigin', '~> 1.7.0'
end
Usage:
// An animated UIImage
let jeremyGif = UIImage.gif(name: "jeremy")
// A UIImageView with async loading
let imageView = UIImageView()
imageView.loadGif(name: "jeremy")
// A UIImageView with async loading from asset catalog(from iOS9)
let imageView = UIImageView()
imageView.loadGif(asset: "jeremy")
For more information follow this link: https://github.com/swiftgif/SwiftGif
Way 1: only works for dataURL, not for other types of url.
function dataURLtoFile(dataurl, filename) {
var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
while(n--){
u8arr[n] = bstr.charCodeAt(n);
}
return new File([u8arr], filename, {type:mime});
}
//Usage example:
var file = dataURLtoFile('data:image/png;base64,......', 'a.png');
console.log(file);
Way 2: works for any type of url, (http url, dataURL, blobURL, etc...)
//return a promise that resolves with a File instance
function urltoFile(url, filename, mimeType){
mimeType = mimeType || (url.match(/^data:([^;]+);/)||'')[1];
return (fetch(url)
.then(function(res){return res.arrayBuffer();})
.then(function(buf){return new File([buf], filename, {type:mimeType});})
);
}
//Usage example:
urltoFile('data:image/png;base64,......', 'a.png')
.then(function(file){
console.log(file);
})
Both works in Chrome and Firefox.
//
is floor division, it will always give you the integer floor of the result. The other is 'regular' division.
With recent browsers you can use the HTML5 download attribute as well:
<a download="quot.pdf" href="../doc/quot.pdf">Click here to Download quotation</a>
It is supported by most of the recent browsers except MSIE11. You can use a polyfill, something like this (note that this is for data uri only, but it is a good start):
(function (){
addEvent(window, "load", function (){
if (isInternetExplorer())
polyfillDataUriDownload();
});
function polyfillDataUriDownload(){
var links = document.querySelectorAll('a[download], area[download]');
for (var index = 0, length = links.length; index<length; ++index) {
(function (link){
var dataUri = link.getAttribute("href");
var fileName = link.getAttribute("download");
if (dataUri.slice(0,5) != "data:")
throw new Error("The XHR part is not implemented here.");
addEvent(link, "click", function (event){
cancelEvent(event);
try {
var dataBlob = dataUriToBlob(dataUri);
forceBlobDownload(dataBlob, fileName);
} catch (e) {
alert(e)
}
});
})(links[index]);
}
}
function forceBlobDownload(dataBlob, fileName){
window.navigator.msSaveBlob(dataBlob, fileName);
}
function dataUriToBlob(dataUri) {
if (!(/base64/).test(dataUri))
throw new Error("Supports only base64 encoding.");
var parts = dataUri.split(/[:;,]/),
type = parts[1],
binData = atob(parts.pop()),
mx = binData.length,
uiArr = new Uint8Array(mx);
for(var i = 0; i<mx; ++i)
uiArr[i] = binData.charCodeAt(i);
return new Blob([uiArr], {type: type});
}
function addEvent(subject, type, listener){
if (window.addEventListener)
subject.addEventListener(type, listener, false);
else if (window.attachEvent)
subject.attachEvent("on" + type, listener);
}
function cancelEvent(event){
if (event.preventDefault)
event.preventDefault();
else
event.returnValue = false;
}
function isInternetExplorer(){
return /*@cc_on!@*/false || !!document.documentMode;
}
})();
There's a -f option to umount that you can try:
umount -f /mnt/fileshare
Are you specifying the '-t cifs' option to mount? Also make sure you're not specifying the 'hard' option to mount.
You may also want to consider fusesmb, since the filesystem will be running in userspace you can kill it just like any other process.
Slight changes over earlier version - tested on CHROME
function PrintElem(elem)
{
var mywindow = window.open('', 'PRINT', 'height=400,width=600');
mywindow.document.write('<html><head><title>' + document.title + '</title>');
mywindow.document.write('</head><body >');
mywindow.document.write('<h1>' + document.title + '</h1>');
mywindow.document.write(document.getElementById(elem).innerHTML);
mywindow.document.write('</body></html>');
mywindow.document.close(); // necessary for IE >= 10
mywindow.focus(); // necessary for IE >= 10*/
mywindow.print();
mywindow.close();
return true;
}
There are three basic options:
1) If retrieval performance is paramount and it is practical to do so, use a form of hash table built once (and altered as/if the List changes).
2) If the List is conveniently sorted or it is practical to sort it and O(log n) retrieval is sufficient, sort and search.
3) If O(n) retrieval is fast enough or if it is impractical to manipulate/maintain the data structure or an alternate, iterate over the List.
Before writing code more complex than a simple iteration over the List, it is worth thinking through some questions.
Why is something different needed? (Time) performance? Elegance? Maintainability? Reuse? All of these are okay reasons, apart or together, but they influence the solution.
How much control do you have over the data structure in question? Can you influence how it is built? Managed later?
What is the life cycle of the data structure (and underlying objects)? Is it built up all at once and never changed, or highly dynamic? Can your code monitor (or even alter) its life cycle?
Are there other important constraints, such as memory footprint? Does information about duplicates matter? Etc.
To Import Data through URL in pandas just apply the simple below code it works actually better.
import pandas as pd
train = pd.read_table("https://urlandfile.com/dataset.csv")
train.head()
If you are having issues with a raw data then just put 'r' before URL
import pandas as pd
train = pd.read_table(r"https://urlandfile.com/dataset.csv")
train.head()
Add { } while importing and exporting:
export { ... };
|
import { ... } from './Template';
export → import { ... } from './Template'
export default → import ... from './Template'
Here is a working example:
// ExportExample.js
import React from "react";
function DefaultExport() {
return "This is the default export";
}
function Export1() {
return "Export without default 1";
}
function Export2() {
return "Export without default 2";
}
export default DefaultExport;
export { Export1, Export2 };
// App.js
import React from "react";
import DefaultExport, { Export1, Export2 } from "./ExportExample";
export default function App() {
return (
<>
<strong>
<DefaultExport />
</strong>
<br />
<Export1 />
<br />
<Export2 />
</>
);
}
??Working sandbox to play around: https://codesandbox.io/s/export-import-example-react-jl839?fontsize=14&hidenavigation=1&theme=dark
In Python 3, the default encoding is "utf-8"
, so you can directly use:
b'hello'.decode()
which is equivalent to
b'hello'.decode(encoding="utf-8")
On the other hand, in Python 2, encoding defaults to the default string encoding. Thus, you should use:
b'hello'.decode(encoding)
where encoding
is the encoding you want.
Note: support for keyword arguments was added in Python 2.7.
Note : Make sure internet permission is given.
In android 9.0,
Webview or Imageloader can not load url or image because android 9 have network security issue which need to be enable by manifest file for all sub domain. so either you can add security config file.
<network-security-config>_x000D_
<domain-config cleartextTrafficPermitted="true">_x000D_
<domain includeSubdomains="true">www.google.com</domain>_x000D_
</domain-config>_x000D_
</network-security-config>
_x000D_
<application_x000D_
_x000D_
android:networkSecurityConfig="@xml/network_security_config"_x000D_
...>_x000D_
</application>
_x000D_
if you want to allow all sub domain
<application_x000D_
android:usesCleartextTraffic="true"_x000D_
...>_x000D_
</application>
_x000D_
Note: To solve the problem, don't use both of point 2 (android:networkSecurityConfig="@xml/network_security_config"
and android:usesCleartextTraffic="true"
) choose one of them
For those who are finding for a thread safe solution, take a look here.
Code:
UPDATE Account
SET sg_status = 'A'
OUTPUT INSERTED.AccountId --You only need this if you want to return some column of the updated item
WHERE AccountId =
(
SELECT TOP 1 AccountId
FROM Account WITH (UPDLOCK) --this is what makes the query thread safe!
ORDER BY CreationDate
)
Currently, they are the same. but previously
VARCHAR
is reserved by Oracle to support distinction between NULL
and empty string in future, as ANSI standard prescribes.
VARCHAR2
does not distinguish between a NULL
and empty string, and never will.
Emp_name varchar(10)
- if you enter value less than 10 digits then remaining space cannot be deleted. it used total of 10 spaces.
Emp_name varchar2(10)
- if you enter value less than 10 digits then remaining space is automatically deleted
easy enough to use the unname()
function:
data.frame <- unname(data.frame)
Use the bash built-in variable SECONDS
. Each time you reference the variable it will return the elapsed time since the script invocation.
Example:
echo "Start $SECONDS"
sleep 10
echo "Middle $SECONDS"
sleep 10
echo "End $SECONDS"
Output:
Start 0
Middle 10
End 20
You can use finds null separated output option with read to iterate over directory structures safely.
#!/bin/bash
find . -type f -print0 | while IFS= read -r -d $'\0' file;
do echo "$file" ;
done
So for your case
#!/bin/bash
find . -maxdepth 1 -type f -print0 | while IFS= read -r -d $'\0' file; do
for ((i=0; i<=3; i++)); do
./MyProgram.exe "$file" 'Logs/'"`basename "$file"`""$i"'.txt'
done
done
additionally
#!/bin/bash
while IFS= read -r -d $'\0' file; do
for ((i=0; i<=3; i++)); do
./MyProgram.exe "$file" 'Logs/'"`basename "$file"`""$i"'.txt'
done
done < <(find . -maxdepth 1 -type f -print0)
will run the while loop in the current scope of the script ( process ) and allow the output of find to be used in setting variables if needed
To add that using Jquery:
$('#commentForm').submit(function(){ //listen for submit event
$.each(params, function(i,param){
$('<input />').attr('type', 'hidden')
.attr('name', param.name)
.attr('value', param.value)
.appendTo('#commentForm');
});
return true;
});
public boolean FileExists(String fname) {
File file = getBaseContext().getFileStreamPath(fname);
return file.exists();
}
Your data homes
is an array, so you would have to iterate over the array using Array.prototype.map() for it to work.
return (
<div className="col">
<h1>Mi Casa</h1>
<p>This is my house y'all!</p>
{homes.map(home => <div>{home.name}</div>)}
</div>
);
I think accepted answer outdated and is not valid anymore.
You can terminate jupyter notebook from web interface on file menü item.
When you move Mouse cursor on "close and halt", you will see following explanation.
And when you click "close and halt", you will see following message on terminal screen.
Make sure your default namespace in the web project properties is the same as the namespace in the Global.asax.cs. I had modified the default namespace to make it a subnamespace, changing it back fixed this issue for me.
Since Python 3.5, subprocess.run() is recommended over subprocess.check_output():
>>> subprocess.run(['cat','/tmp/text.txt'], stdout=subprocess.PIPE).stdout
b'First line\nSecond line\n'
Since Python 3.7, instead of the above, you can use capture_output=true
parameter to capture stdout and stderr:
>>> subprocess.run(['cat','/tmp/text.txt'], capture_output=True).stdout
b'First line\nSecond line\n'
Also, you may want to use universal_newlines=True
or its equivalent since Python 3.7 text=True
to work with text instead of binary:
>>> stdout = subprocess.run(['cat', '/tmp/text.txt'], capture_output=True, text=True).stdout
>>> print(stdout)
First line
Second line
See subprocess.run() documentation for more information.
Just use this website. It'll convert any curl command into Python, Node.js, PHP, R, or Go.
Example:
curl -X POST -H 'Content-type: application/json' --data '{"text":"Hello, World!"}' https://hooks.slack.com/services/asdfasdfasdf
Becomes this in Python,
import requests
headers = {
'Content-type': 'application/json',
}
data = '{"text":"Hello, World!"}'
response = requests.post('https://hooks.slack.com/services/asdfasdfasdf', headers=headers, data=data)
@media screen and (max-width : 760px)
(for tablets and phones) and use with this: <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
mvn package -Dmaven.test.skip=true
create table xyz_new as select * from xyz where 1=0;
http://www.codeassists.com/questions/oracle/copy-table-data-to-new-table-in-oracle
You can use Arrays.asList to get some list (not necessarily ArrayList) and then use addAll() to add it to an ArrayList:
new ArrayList<Double>().addAll(Arrays.asList(1.38L, 2.56L, 4.3L));
If you're using Java6 (or higher) you can also use the ArrayList constructor that takes another list:
new ArrayList<Double>(Arrays.asList(1.38L, 2.56L, 4.3L));
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.')
You can define more details by extending AbstractMongoConfiguration.
@Configuration
@EnableMongoRepositories("demo.mongo.model")
public class SpringMongoConfig extends AbstractMongoConfiguration {
@Value("${spring.profiles.active}")
private String profileActive;
@Value("${spring.application.name}")
private String proAppName;
@Value("${spring.data.mongodb.host}")
private String mongoHost;
@Value("${spring.data.mongodb.port}")
private String mongoPort;
@Value("${spring.data.mongodb.database}")
private String mongoDB;
@Override
public MongoMappingContext mongoMappingContext()
throws ClassNotFoundException {
// TODO Auto-generated method stub
return super.mongoMappingContext();
}
@Override
@Bean
public Mongo mongo() throws Exception {
return new MongoClient(mongoHost + ":" + mongoPort);
}
@Override
protected String getDatabaseName() {
// TODO Auto-generated method stub
return mongoDB;
}
}
You can also use partial
from functools
if you want to use a function that takes parameters but the function you are mocking does not. E.g. like this:
def mock_year(year):
return datetime.datetime(year, 11, 28, tzinfo=timezone.utc)
@patch('django.utils.timezone.now', side_effect=partial(mock_year, year=2020))
This will return a callable that doesn't accept parameters (like Django's timezone.now()), but my mock_year function does.
If you use Libpq binding for respective language, according to its documentation URI is formed as follows:
postgresql://[user[:password]@][netloc][:port][/dbname][?param1=value1&...]
Here are examples from same document
postgresql://
postgresql://localhost
postgresql://localhost:5432
postgresql://localhost/mydb
postgresql://user@localhost
postgresql://user:secret@localhost
postgresql://other@localhost/otherdb?connect_timeout=10&application_name=myapp
postgresql://localhost/mydb?user=other&password=secret
/C
Carries out the command specified by the string and then terminates.
You can get all the cmd command line switches by typing cmd /?
.
Some more info for Browser window : http://www.w3schools.com/js/js_window.asp?output=print
This command is for the PERL fans :
ls -1 | perl -l40pe0
Here 40 is the octal ascii code for space.
-p will process line by line and print
-l will take care of replacing the trailing \n with the ascii character we provide.
-e is to inform PERL we are doing command line execution.
0 means that there is actually no command to execute.
perl -e0 is same as perl -e ' '
e
doesn't have any special meaning. It's just a convention to use e
as function parameter name when the parameter is event
.
It can be
$(this).click(function(loremipsumdolorsitamet) {
// does something
}
as well.
From the documentation (assuming that you use SQL-Server):
USE AdventureWorks;
GO
DECLARE @returnstatus nvarchar(15);
SET @returnstatus = NULL;
EXEC @returnstatus = dbo.ufnGetSalesOrderStatusText @Status = 2;
PRINT @returnstatus;
GO
So yes, it should work that way.
If you really want to match only the dot, then StringComparison.Ordinal
would be fastest, as there is no case-difference.
"Ordinal" doesn't use culture and/or casing rules that are not applicable anyway on a symbol like a .
.
CSS supports text input for colors (i.e. "black" = #000000 "white" = #ffffff) So I think the helpful solution we are looking for here is how can one have PHP take the output from an HTML form text input box and have it tell CSS to use this line of text for background color.
So that when a a user types "blue" into the text field titled "what is your favorite color", they are returned a page with a blue background, or whatever color they happen to type in so long as it is recognized by CSS.
I believe Dan is on the right track, but may need to elaborate for use PHP newbies, when I try this I am returned a green screen no matter what is typed in (I even set this up as an elseif to display a white background if no data is entered in the text field, still green?
This will work in the latest Xcode.
-(UITableViewCell *) tableView: (UITableView *) tableView cellForRowAtIndexPath: (NSIndexPath *) indexPath {
cell.backgroundColor = [UIColor grayColor];
}
First thing you should check is that whether the image exists in the root directory or not. This is mostly due to image with height = 0. Which means that cv2.imread(imageName)
is not reading the image.
const sleep = t => new Promise(s => setTimeout(s, t));
DEMO
const sleep = t => new Promise(s => setTimeout(s, t));
// usage
async function demo() {
// count down
let i = 6;
while (i--) {
await sleep(1000);
console.log(i);
}
// sum of numbers 0 to 5 using by delay of 1 second
const sum = await [...Array(6).keys()].reduce(async (a, b) => {
a = await a;
await sleep(1000);
const result = a + b;
console.log(`${a} + ${b} = ${result}`);
return result;
}, Promise.resolve(0));
console.log("sum", sum);
}
demo();
_x000D_
It is possible to use the format()
function, so in your case you can use:
return '{:02d}:{:02d}:{:.2f} {}'.format(hours, minutes, seconds, ampm)
There are multiple ways of using this function, so for further information you can check the documentation.
f-strings is a new feature that has been added to the language in Python 3.6. This facilitates formatting strings notoriously:
return f'{hours:02d}:{minutes:02d}:{seconds:.2f} {ampm}'
You should watch this: Node Tuts episode 19 - Asynchronous Iteration Patterns
It should answers your questions.
It can work for all kind of layout.
android:windowSoftInputMode="adjustResize"
for example:
<activity android:name=".ActivityLogin"
android:screenOrientation="portrait"
android:theme="@style/AppThemeTransparent"
android:windowSoftInputMode="adjustResize"/>
android:fitsSystemWindows="true"
and
android:layout_alignParentBottom="true"
for example:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:fitsSystemWindows="true">
The cd
command on Windows is not intuitive for users of Linux systems. If you expect cd
to go to another directory no matter whether it is in the current drive or another drive, you can create an alias for cd
. Here is how to do it in Cmder:
$CMDER_ROOT/config
and open the file user_aliases.cmd
cd=cd /d $*
Restart Cmder and you should be able to cd to any directory you want. It is a small trick but works great and saves your time.
Using python, here are few methods:
import statistics as st
n = int(input())
data = list(map(int, input().split()))
stdev = st.pstdev(data)
variance = st.pvariance(data)
devia = math.sqrt(variance)
mean = sum(data)/n
variance = sum([((x - mean) ** 2) for x in X]) / n
stddev = variance ** 0.5
print("{0:0.1f}".format(stddev))
variance
calculates variance of sample population pvariance
calculates variance of entire population stdev
and pstdev
Updated....For ubuntu users
sudo apt-get install libapache2-mod-php php-common php-gd php-mysql php-curl php-intl php-xsl php-mbstring php-zip php-bcmath php-soap php-xdebug php-imagick
As mentioned in other answers: "The new line character is \n. It is used inside a string".
I found the most simple and readable way is to use the "format" function, using nl as the name for a new line, and break the string you want to print to the exact format you going to print it:
python2:
print("line1{nl}"
"line2{nl}"
"line3".format(nl="\n"))
python3:
nl = "\n"
print(f"line1{nl}"
f"line2{nl}"
f"line3")
That will output:
line1
line2
line3
This way it performs the task, and also gives high readability of the code :)
A. Grab file data from the file field
The first thing to do is bind a function to the change event on your file field and a function for grabbing the file data:
// Variable to store your files
var files;
// Add events
$('input[type=file]').on('change', prepareUpload);
// Grab the files and set them to our variable
function prepareUpload(event)
{
files = event.target.files;
}
This saves the file data to a file variable for later use.
B. Handle the file upload on submit
When the form is submitted you need to handle the file upload in its own AJAX request. Add the following binding and function:
$('form').on('submit', uploadFiles);
// Catch the form submit and upload the files
function uploadFiles(event)
{
event.stopPropagation(); // Stop stuff happening
event.preventDefault(); // Totally stop stuff happening
// START A LOADING SPINNER HERE
// Create a formdata object and add the files
var data = new FormData();
$.each(files, function(key, value)
{
data.append(key, value);
});
$.ajax({
url: 'submit.php?files',
type: 'POST',
data: data,
cache: false,
dataType: 'json',
processData: false, // Don't process the files
contentType: false, // Set content type to false as jQuery will tell the server its a query string request
success: function(data, textStatus, jqXHR)
{
if(typeof data.error === 'undefined')
{
// Success so call function to process the form
submitForm(event, data);
}
else
{
// Handle errors here
console.log('ERRORS: ' + data.error);
}
},
error: function(jqXHR, textStatus, errorThrown)
{
// Handle errors here
console.log('ERRORS: ' + textStatus);
// STOP LOADING SPINNER
}
});
}
What this function does is create a new formData object and appends each file to it. It then passes that data as a request to the server. 2 attributes need to be set to false:
C. Upload the files
Quick and dirty php script to upload the files and pass back some info:
<?php // You need to add server side validation and better error handling here
$data = array();
if(isset($_GET['files']))
{
$error = false;
$files = array();
$uploaddir = './uploads/';
foreach($_FILES as $file)
{
if(move_uploaded_file($file['tmp_name'], $uploaddir .basename($file['name'])))
{
$files[] = $uploaddir .$file['name'];
}
else
{
$error = true;
}
}
$data = ($error) ? array('error' => 'There was an error uploading your files') : array('files' => $files);
}
else
{
$data = array('success' => 'Form was submitted', 'formData' => $_POST);
}
echo json_encode($data);
?>
IMP: Don't use this, write your own.
D. Handle the form submit
The success method of the upload function passes the data sent back from the server to the submit function. You can then pass that to the server as part of your post:
function submitForm(event, data)
{
// Create a jQuery object from the form
$form = $(event.target);
// Serialize the form data
var formData = $form.serialize();
// You should sterilise the file names
$.each(data.files, function(key, value)
{
formData = formData + '&filenames[]=' + value;
});
$.ajax({
url: 'submit.php',
type: 'POST',
data: formData,
cache: false,
dataType: 'json',
success: function(data, textStatus, jqXHR)
{
if(typeof data.error === 'undefined')
{
// Success so call function to process the form
console.log('SUCCESS: ' + data.success);
}
else
{
// Handle errors here
console.log('ERRORS: ' + data.error);
}
},
error: function(jqXHR, textStatus, errorThrown)
{
// Handle errors here
console.log('ERRORS: ' + textStatus);
},
complete: function()
{
// STOP LOADING SPINNER
}
});
}
Final note
This script is an example only, you'll need to handle both server and client side validation and some way to notify users that the file upload is happening. I made a project for it on Github if you want to see it working.
You have to upload your public key to Heroku:
heroku keys:add ~/.ssh/id_rsa.pub
If you don't have a public key, Heroku will prompt you to add one automatically which works seamlessly. Just use:
heroku keys:add
To clear all your previous keys do :
heroku keys:clear
To display all your existing keys do :
heroku keys
EDIT:
The above did not seem to work for me. I had messed around with the HOME
environment variable and so SSH was searching for keys in the wrong directory.
To ensure that SSH checks for the key in the correct directory do :
ssh -vT [email protected]
Which will display the following ( Sample ) lines
OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007
debug1: Connecting to heroku.com [50.19.85.156] port 22.
debug1: Connection established.
debug1: identity file /c/Wrong/Directory/.ssh/identity type -1
debug1: identity file /c/Wrong/Directory/.ssh/id_rsa type -1
debug1: identity file /c/Wrong/Directory/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version Twisted
debug1: no match: Twisted
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: sending SSH2_MSG_KEXDH_INIT
debug1: expecting SSH2_MSG_KEXDH_REPLY
debug1: Host 'heroku.com' is known and matches the RSA host key.
debug1: Found key in /c/Wrong/Directory/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /c/Wrong/Directory/.ssh/identity
debug1: Trying private key: /c/Wrong/Directory/.ssh/id_rsa
debug1: Trying private key: /c/Wrong/Directory/.ssh/id_dsa
debug1: No more authentication methods to try.
Permission denied (publickey).
From the above you could observe that ssh looks for the keys in the /c/Wrong/Directory/.ssh
directory which is not where we have the public keys that we just added to heroku ( using heroku keys:add ~/.ssh/id_rsa.pub
) ( Please note that in windows OS ~
refers to the HOME
path which in win 7 / 8 is C:\Users\UserName
)
To view your current home directory do : echo $HOME
or echo %HOME%
( Windows )
To set your HOME
directory correctly ( by correctly I mean the parent directory of .ssh
directory, so that ssh could look for keys in the correct directory ) refer these links :
Panagiotis Kanavos is right, sometimes copy and paste T-SQL can make appear unwanted characters...
I finally found a simple and fast way (only Notepad++ needed) to detect which character is wrong, without having to manually rewrite the whole statement: there is no need to save any file to disk.
It's pretty quick, in Notepad++:
You should easily find the wrong character(s)
I had this problem, when I was trying to create a new feature branch that contained name of the old branch, e.g. origin - branch1 and I wanted to create branch1-feature. It wasn't possibble, but branch1/feature was already.
Create APC.php file
foreach(array('user','opcode','') as $v ){
apc_clear_cache($v);
}
Run it from your browser.
In my experience, MyISAM was a better choice as long as you don't do DELETEs, UPDATEs, a whole lot of single INSERT, transactions, and full-text indexing. BTW, CHECK TABLE is horrible. As the table gets older in terms of the number of rows, you don't know when it will end.
I think you what you want is a tuple. If you use return (i, card)
, you can get these two results by:
i, card = select_choice()
Call this method to check the network Connection.
public static bool IsConnectedToInternet()
{
bool returnValue = false;
try
{
int Desc;
returnValue = Utility.InternetGetConnectedState(out Desc, 0);
}
catch
{
returnValue = false;
}
return returnValue;
}
Put this below line of code.
[DllImport("wininet.dll")]
public extern static bool InternetGetConnectedState(out int Description, int ReservedValue);
Here's the exact definition of UsedRange
(MSDN reference) :
Every Worksheet object has a UsedRange property that returns a Range object representing the area of a worksheet that is being used. The UsedRange property represents the area described by the farthest upper-left and farthest lower-right nonempty cells in a worksheet and includes all cells in between.
So basically, what that line does is :
.UsedRange
-> "Draws" a box around the outer-most cells with content inside..Columns
-> Selects the entire columns of those cells.Count
-> Returns an integer corresponding to how many columns there are (in this selection)- 8
-> Subtracts 8 from the previous integer.I assume VBA calculates the UsedRange by finding the non-empty cells with lowest and highest index values.
Most likely, you're getting an error because the number of lines in your range is smaller than 3, and therefore the number returned is negative.
try
block contains set of statements where an exception can occur.
catch
block will be used to used to handle the exception that occur with in try
block. A try
block is always followed by a catch
block and we can have multiple catch blocks.
finally
block is executed after catch block. We basically use it to put some common code when there are multiple catch blocks. Even if there is an exception or not finally block gets executed.
throw
keyword will allow you to throw an exception and it is used to transfer control from try block to catch block.
throws
keyword is used for exception handling without try & catch block. It specifies the exceptions that a method can throw to the caller and does not handle itself.
// Java program to demonstrate working of throws, throw, try, catch and finally.
public class MyExample {
static void myMethod() throws IllegalAccessException
{
System.out.println("Inside myMethod().");
throw new IllegalAccessException("demo");
}
// This is a caller function
public static void main(String args[])
{
try {
myMethod();
}
catch (IllegalAccessException e) {
System.out.println("exception caught in main method.");
}
finally(){
System.out.println("I am in final block.");
}
}
}
Output:
Inside myMethod().
exception caught in main method.
I am in final block.
It is always better to close the database/resource objects after usage.
Better close the connection, resultset and statement objects in the finally
block.
Until Java 7, all these resources need to be closed using a finally
block. If you are using Java 7, then for closing the resources, you can do as follows.
try(Connection con = getConnection(url, username, password, "org.postgresql.Driver");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(sql);
) {
// Statements
}
catch(....){}
Now, the con
, stmt
and rs
objects become part of try block and Java automatically closes these resources after use.
Sorry for reviving old thread - Compass' stretch with an :after pseudo-selector might suit your purpose - eg. if you want a div to fill width from left to (50% + 10px) of screen you could use (in SASS indented syntax):
.example
background: red
+stretch(0, -10px, 0, 0)
&:after
+stretch(0, 0, 0, 50%)
content: ' '
background: blue
The :after element fills 50% to the right of .example (leaving 50% available for .example's width), then .example is stretched to that width plus 10px.
For Intellij IDEA Community 2019.1 you will need to follow these steps :
File -> New -> Edit File Templates.. -> Class -> /* Created by ${USER} on ${DATE} */
If you want to add you custom Overlay screen on Layout, you can create a Custom Linear Layout and get control of drawing and key events. You can my tutorial- Overlay on Android Layout- http://prasanta-paul.blogspot.com/2010/08/overlay-on-android-layout.html
Array indexes in JavaScript start at zero for the first item, so try this:
var firstArrayItem = myValues[0]
Of course, if you actually want the second item in the array at index 1, then it's myValues[1]
.
See Accessing array elements for more info.
From a lambda, you can't get a reference to anything that isn't final. You need to declare a final wrapper from outside the lamda to hold your variable.
I've added the final 'reference' object as this wrapper.
private TimeZone extractCalendarTimeZoneComponent(Calendar cal,TimeZone calTz) {
final AtomicReference<TimeZone> reference = new AtomicReference<>();
try {
cal.getComponents().getComponents("VTIMEZONE").forEach(component->{
VTimeZone v = (VTimeZone) component;
v.getTimeZoneId();
if(reference.get()==null) {
reference.set(TimeZone.getTimeZone(v.getTimeZoneId().getValue()));
}
});
} catch (Exception e) {
//log.warn("Unable to determine ical timezone", e);
}
return reference.get();
}
This is an adding to @Sam answer that though is correct is missing the fact that anytime you open a folder in visual studio code, it create a .vscode folder, but those can be multiple, created any time you eventually open a directory. The .vscode folder has JSON objects that content properties such "setting.json", in which one declare the Interpreter to use at that ".vscode" level( refer to this for more clarifications What is a 'workspace' in VS Code?).
{
{
"python.pythonPath": "VirtualEnPath/bin/python3.6"
}
}
So potentially you could open VS code at another level in the virtual Env, it create another .vscode folder that assume as Python directory those of the global machine and so having such error, and has I experienced has nothing to do if the Virtual Env is activated or not.
This indeed what happened to me, I have indeed a DjangoRESTAPI_GEN folder in which I initially opened the IDE and it did recognize the Virtual Env Python path, the a few days after I opened it at the level where git is, so it did created another .vscode, that picked the global Python Interpreter, causing my lint in the Virtual Environment not been used, and the virtual env interpreter not even showed in "select python interpreter". But as wrote opening the IDE at the level where the .vscode that has the settings.json with correct path, it does.
Once you set the correct path in the setting.json and select the virtual env interpreter, then VS Code will automatically activate the VE in its terminal
When this happened to me (out of nowhere) I was about to dive into the top answer above, and then I figured I'd close the project, close Visual Studio, and then re-open everything. Problem solved. VS bug?
I'm solved this problem more simple way using regex
fun parseTime(time: String?): Long {
val longRegex = "\\d{4}+-\\d{2}+-\\d{2}+\\w\\d{2}:\\d{2}:\\d{2}.\\d{3}[Z]\$"
val shortRegex = "\\d{4}+-\\d{2}+-\\d{2}+\\w\\d{2}:\\d{2}:\\d{2}Z\$"
val longDateFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sssXXX")
val shortDateFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX")
return when {
Pattern.matches(longRegex, time) -> longDateFormat.parse(time).time
Pattern.matches(shortRegex, time) -> shortDateFormat.parse(time).time
else -> throw InvalidParamsException(INVALID_TIME_MESSAGE, null)
}
}
The EOF
token must be at the beginning of the line, you can't indent it along with the block of code it goes with.
If you write <<-EOF
you may indent it, but it must be indented with Tab characters, not spaces. So it still might not end up even with the block of code.
Also make sure you have no whitespace after the EOF
token on the line.
thanks @iuryxavier
from multiprocessing import Pool
from multiprocessing import cpu_count
def add_1(x):
return x + 1
if __name__ == "__main__":
pool = Pool(cpu_count())
results = pool.map(add_1, range(10**12))
pool.close() # 'TERM'
pool.join() # 'KILL'
Check out perlfaq4: How do I merge two hashes. There is a lot of good information already in the Perl documentation and you can have it right away rather than waiting for someone else to answer it. :)
Before you decide to merge two hashes, you have to decide what to do if both hashes contain keys that are the same and if you want to leave the original hashes as they were.
If you want to preserve the original hashes, copy one hash (%hash1) to a new hash (%new_hash), then add the keys from the other hash (%hash2 to the new hash. Checking that the key already exists in %new_hash gives you a chance to decide what to do with the duplicates:
my %new_hash = %hash1; # make a copy; leave %hash1 alone
foreach my $key2 ( keys %hash2 )
{
if( exists $new_hash{$key2} )
{
warn "Key [$key2] is in both hashes!";
# handle the duplicate (perhaps only warning)
...
next;
}
else
{
$new_hash{$key2} = $hash2{$key2};
}
}
If you don't want to create a new hash, you can still use this looping technique; just change the %new_hash to %hash1.
foreach my $key2 ( keys %hash2 )
{
if( exists $hash1{$key2} )
{
warn "Key [$key2] is in both hashes!";
# handle the duplicate (perhaps only warning)
...
next;
}
else
{
$hash1{$key2} = $hash2{$key2};
}
}
If you don't care that one hash overwrites keys and values from the other, you could just use a hash slice to add one hash to another. In this case, values from %hash2 replace values from %hash1 when they have keys in common:
@hash1{ keys %hash2 } = values %hash2;
There is an infinity in the NumPy library: from numpy import inf
. To get negative infinity one can simply write -inf
.
Just do:
echo substr($string, 0, -3);
You don't need to use a strlen
call, since, as noted in the substr docs:
If length is given and is negative, then that many characters will be omitted from the end of string
Try to use r.hasNext() instead of r.hasNextLine():
while(r.hasNext()) {
scan = r.next();
Just try to remove clear:both
property from the div
with class
sample
and see how it follows floating divs
.
Use nested dictionaries. Take a look:
INI File: example.ini
[Section]
Key = Value
Code:
class IniOpen:
def __init__(self, file):
self.parse = {}
self.file = file
self.open = open(file, "r")
self.f_read = self.open.read()
split_content = self.f_read.split("\n")
section = ""
pairs = ""
for i in range(len(split_content)):
if split_content[i].find("[") != -1:
section = split_content[i]
section = string_between(section, "[", "]") # define your own function
self.parse.update({section: {}})
elif split_content[i].find("[") == -1 and split_content[i].find("="):
pairs = split_content[i]
split_pairs = pairs.split("=")
key = split_pairs[0].trim()
value = split_pairs[1].trim()
self.parse[section].update({key: value})
def read(self, section, key):
try:
return self.parse[section][key]
except KeyError:
return "Sepcified Key Not Found!"
def write(self, section, key, value):
if self.parse.get(section) is None:
self.parse.update({section: {}})
elif self.parse.get(section) is not None:
if self.parse[section].get(key) is None:
self.parse[section].update({key: value})
elif self.parse[section].get(key) is not None:
return "Content Already Exists"
Apply code like so:
ini_file = IniOpen("example.ini")
print(ini_file.parse) # prints the entire nested dictionary
print(ini_file.read("Section", "Key") # >> Returns Value
ini_file.write("NewSection", "NewKey", "New Value"
Here is a simple serializer library I knocked up. It's header only, c11 and has examples for serializing basic types. Here's one for a map to class.
https://github.com/goblinhack/simple-c-plus-plus-serializer
#include "c_plus_plus_serializer.h"
class Custom {
public:
int a;
std::string b;
std::vector c;
friend std::ostream& operator<<(std::ostream &out,
Bits my)
{
out << bits(my.t.a) << bits(my.t.b) << bits(my.t.c);
return (out);
}
friend std::istream& operator>>(std::istream &in,
Bits my)
{
in >> bits(my.t.a) >> bits(my.t.b) >> bits(my.t.c);
return (in);
}
friend std::ostream& operator<<(std::ostream &out,
class Custom &my)
{
out << "a:" << my.a << " b:" << my.b;
out << " c:[" << my.c.size() << " elems]:";
for (auto v : my.c) {
out << v << " ";
}
out << std::endl;
return (out);
}
};
static void save_map_key_string_value_custom (const std::string filename)
{
std::cout << "save to " << filename << std::endl;
std::ofstream out(filename, std::ios::binary );
std::map< std::string, class Custom > m;
auto c1 = Custom();
c1.a = 1;
c1.b = "hello";
std::initializer_list L1 = {"vec-elem1", "vec-elem2"};
std::vector l1(L1);
c1.c = l1;
auto c2 = Custom();
c2.a = 2;
c2.b = "there";
std::initializer_list L2 = {"vec-elem3", "vec-elem4"};
std::vector l2(L2);
c2.c = l2;
m.insert(std::make_pair(std::string("key1"), c1));
m.insert(std::make_pair(std::string("key2"), c2));
out << bits(m);
}
static void load_map_key_string_value_custom (const std::string filename)
{
std::cout << "read from " << filename << std::endl;
std::ifstream in(filename);
std::map< std::string, class Custom > m;
in >> bits(m);
std::cout << std::endl;
std::cout << "m = " << m.size() << " list-elems { " << std::endl;
for (auto i : m) {
std::cout << " [" << i.first << "] = " << i.second;
}
std::cout << "}" << std::endl;
}
void map_custom_class_example (void)
{
std::cout << "map key string, value class" << std::endl;
std::cout << "============================" << std::endl;
save_map_key_string_value_custom(std::string("map_of_custom_class.bin"));
load_map_key_string_value_custom(std::string("map_of_custom_class.bin"));
std::cout << std::endl;
}
Output:
map key string, value class
============================
save to map_of_custom_class.bin
read from map_of_custom_class.bin
m = 2 list-elems {
[key1] = a:1 b:hello c:[2 elems]:vec-elem1 vec-elem2
[key2] = a:2 b:there c:[2 elems]:vec-elem3 vec-elem4
}
I wanted also to check if a remote file exist but with RSH. I have tried the previous solutions but they didn't work with RSH.
Finally, I did I short function which works fine:
function existRemoteFile ()
{
REMOTE=$1
FILE=$2
RESULT=$(rsh -l user $REMOTE "test -e $FILE && echo \"0\" || echo \"1\"")
if [ $RESULT -eq 0 ]
then
return 0
else
return 1
fi
}
Sometimes, the right set of keys (Pause, Break or ScrLk) are not available on the keyboard (mostly happens with laptop users) and pressing Esc 2, 3 or multiple times doesn't halt the macro too.
I got stuck too and eventually found the solution in accessibility feature of Windows after which I tried all the researched options and 3 of them worked for me in 3 different scenarios.
Step #01: If your keyboard does not have a specific key, please do not worry and open the 'OnScreen Keyboard' from Windows Utilities by pressing Win + U.
Step #02: Now, try any of the below option and of them will definitely work depending on your system architecture i.e. OS and Office version
You will be put into break mode using the above key combinations as the macro suspends execution immediately finishing the current task. For eg. if it is pulling the data from web then it will halt immediately before execting any next command but after pulling the data, following which one can press F5 or F8 to continue the debugging.
Similar to getting the length of a dataframe, len(df)
, the following worked for pandas and blaze:
Total = sum(df['MyColumn'])
or alternatively
Total = sum(df.MyColumn)
print Total
Suppose I have the following table T
:
a b
--------
1 abc
1 def
1 ghi
2 jkl
2 mno
2 pqr
And I do the following query:
SELECT a, b
FROM T
GROUP BY a
The output should have two rows, one row where a=1
and a second row where a=2
.
But what should the value of b show on each of these two rows? There are three possibilities in each case, and nothing in the query makes it clear which value to choose for b in each group. It's ambiguous.
This demonstrates the single-value rule, which prohibits the undefined results you get when you run a GROUP BY query, and you include any columns in the select-list that are neither part of the grouping criteria, nor appear in aggregate functions (SUM, MIN, MAX, etc.).
Fixing it might look like this:
SELECT a, MAX(b) AS x
FROM T
GROUP BY a
Now it's clear that you want the following result:
a x
--------
1 ghi
2 pqr
Assuming type TreeMap<String,Integer> :
for(Map.Entry<String,Integer> entry : treeMap.entrySet()) {
String key = entry.getKey();
Integer value = entry.getValue();
System.out.println(key + " => " + value);
}
(key and Value types can be any class of course)
Step 1: Create a Type as Table with name TableType that will accept a table having one varchar column
create type TableType
as table ([value] varchar(100) null)
Step 2: Create a function that will accept above declared TableType as Table-Valued Parameter and String Value as Separator
create function dbo.fn_get_string_with_delimeter (@table TableType readonly,@Separator varchar(5))
returns varchar(500)
As
begin
declare @return varchar(500)
set @return = stuff((select @Separator + value from @table for xml path('')),1,1,'')
return @return
end
Step 3: Pass table with one varchar column to the user-defined type TableType and ',' as separator in the function
select dbo.fn_get_string_with_delimeter(@tab, ',')