Excel Date Conversion from yyyymmdd to mm/dd/yyyy
Do you have ROWS of data (horizontal) as you stated or COLUMNS (vertical)?
If it's the latter you can use "Text to columns" functionality to convert a whole column "in situ" - to do that:
Select column > Data > Text to columns > Next > Next > Choose "Date" under "column data format" and "YMD" from dropdown > Finish
....otherwise you can convert with a formula by using
=TEXT(A1,"0000-00-00")+0
and format in required date format
ojdbc14.jar vs. ojdbc6.jar
Actually, ojdbc14.jar doesn't really say anything about the real version of the driver (see JDBC Driver Downloads), except that it predates Oracle 11g. In such situation, you should provide the exact version.
Anyway, I think you'll find some explanation in What is going on with DATE and TIMESTAMP? In short, they changed the behavior in 9.2 drivers and then again in 11.1 drivers.
This might explain the differences you're experiencing (and I suggest using the most recent version i.e. the 11.2 drivers).
Angularjs - display current date
Another way of doing is:
In Controller, create a variable to hold the current date as shown below:
var eventsApp = angular.module("eventsApp", []);
eventsApp.controller("EventController", function EventController($scope)
{
$scope.myDate = Date.now();
});
In HTML view,
<!DOCTYPE html>
<html ng-app="eventsApp">
<head>
<meta charset="utf-8" />
<title></title>
<script src="lib/angular/angular.js"></script>
</head>
<body>
<div ng-controller="EventController">
<span>{{myDate | date : 'yyyy-MM-dd'}}</span>
</div>
</body>
</html>
Where does pip install its packages?
One can import the package then consult its help
import statsmodels
help(sm)
At the very bottom of the help there is a section FILE that indicates where this package was installed.
This solution was tested with at least matplotlib (3.1.2) and statsmodels (0.11.1) (python 3.8.2).
OwinStartup not firing
This worked for me:
add authentication mode="None"
<system.web>
<compilation debug="true" targetFramework="4.6.1" />
<httpRuntime targetFramework="4.6.1" />
<authentication mode="None" /><!--Use OWIN-->
</system.web>
How do I save and restore multiple variables in python?
You could use klepto, which provides persistent caching to memory, disk, or database.
dude@hilbert>$ python
Python 2.7.6 (default, Nov 12 2013, 13:26:39)
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from klepto.archives import file_archive
>>> db = file_archive('foo.txt')
>>> db['1'] = 1
>>> db['max'] = max
>>> squared = lambda x: x**2
>>> db['squared'] = squared
>>> def add(x,y):
... return x+y
...
>>> db['add'] = add
>>> class Foo(object):
... y = 1
... def bar(self, x):
... return self.y + x
...
>>> db['Foo'] = Foo
>>> f = Foo()
>>> db['f'] = f
>>> db.dump()
>>>
Then, after interpreter restart...
dude@hilbert>$ python
Python 2.7.6 (default, Nov 12 2013, 13:26:39)
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from klepto.archives import file_archive
>>> db = file_archive('foo.txt')
>>> db
file_archive('foo.txt', {}, cached=True)
>>> db.load()
>>> db
file_archive('foo.txt', {'1': 1, 'add': <function add at 0x10610a0c8>, 'f': <__main__.Foo object at 0x10510ced0>, 'max': <built-in function max>, 'Foo': <class '__main__.Foo'>, 'squared': <function <lambda> at 0x10610a1b8>}, cached=True)
>>> db['add'](2,3)
5
>>> db['squared'](3)
9
>>> db['f'].bar(4)
5
>>>
Get the code here:
https://github.com/uqfoundation
How can I URL encode a string in Excel VBA?
Similar to Michael-O's code, only without need to reference (late bind) and with less one line .
* I read, that in excel 2013 it can be done more easily like so:
WorksheetFunction.EncodeUrl(InputString)
Public Function encodeURL(str As String)
Dim ScriptEngine As Object
Dim encoded As String
Set ScriptEngine = CreateObject("scriptcontrol")
ScriptEngine.Language = "JScript"
encoded = ScriptEngine.Run("encodeURIComponent", str)
encodeURL = encoded
End Function
Search and replace in bash using regular expressions
I know this is an ancient thread, but it was my first hit on Google, and I wanted to share the following resub that I put together, which adds support for multiple $1, $2, etc. backreferences...
#!/usr/bin/env bash
############################################
### resub - regex substitution in bash ###
############################################
resub() {
local match="$1" subst="$2" tmp
if [[ -z $match ]]; then
echo "Usage: echo \"some text\" | resub '(.*) (.*)' '\$2 me \${1}time'" >&2
return 1
fi
### First, convert "$1" to "$BASH_REMATCH[1]" and 'single-quote' for later eval-ing...
### Utility function to 'single-quote' a list of strings
squot() { local a=(); for i in "$@"; do a+=( $(echo \'${i//\'/\'\"\'\"\'}\' )); done; echo "${a[@]}"; }
tmp=""
while [[ $subst =~ (.*)\${([0-9]+)}(.*) ]] || [[ $subst =~ (.*)\$([0-9]+)(.*) ]]; do
tmp="\${BASH_REMATCH[${BASH_REMATCH[2]}]}$(squot "${BASH_REMATCH[3]}")${tmp}"
subst="${BASH_REMATCH[1]}"
done
subst="$(squot "${subst}")${tmp}"
### Now start (globally) substituting
tmp=""
while read line; do
counter=0
while [[ $line =~ $match(.*) ]]; do
eval tmp='"${tmp}${line%${BASH_REMATCH[0]}}"'"${subst}"
line="${BASH_REMATCH[$(( ${#BASH_REMATCH[@]} - 1 ))]}"
done
echo "${tmp}${line}"
done
}
resub "$@"
##################
### EXAMPLES ###
##################
### % echo "The quick brown fox jumps quickly over the lazy dog" | resub quick slow
### The slow brown fox jumps slowly over the lazy dog
### % echo "The quick brown fox jumps quickly over the lazy dog" | resub 'quick ([^ ]+) fox' 'slow $1 sheep'
### The slow brown sheep jumps quickly over the lazy dog
### % animal="sheep"
### % echo "The quick brown fox 'jumps' quickly over the \"lazy\" \$dog" | resub 'quick ([^ ]+) fox' "\"\$low\" \${1} '$animal'"
### The "$low" brown 'sheep' 'jumps' quickly over the "lazy" $dog
### % echo "one two three four five" | resub "one ([^ ]+) three ([^ ]+) five" 'one $2 three $1 five'
### one four three two five
### % echo "one two one four five" | resub "one ([^ ]+) " 'XXX $1 '
### XXX two XXX four five
### % echo "one two three four five one six three seven eight" | resub "one ([^ ]+) three ([^ ]+) " 'XXX $1 YYY $2 '
### XXX two YYY four five XXX six YYY seven eight
H/T to @Charles Duffy re: (.*)$match(.*)
Change size of text in text input tag?
This works, too.
<input style="width:300px; height:55px; font-size:50px;" />
A CSS stylesheet looks better though, and can easily be used over multiple pages.
How do I concatenate two arrays in C#?
Here's my answer:
int[] z = new List<string>()
.Concat(a)
.Concat(b)
.Concat(c)
.ToArray();
This method can be used at initialization level, for example to define a static concatenation of static arrays:
public static int[] a = new int [] { 1, 2, 3, 4, 5 };
public static int[] b = new int [] { 6, 7, 8 };
public static int[] c = new int [] { 9, 10 };
public static int[] z = new List<string>()
.Concat(a)
.Concat(b)
.Concat(c)
.ToArray();
However, it comes with two caveats that you need to consider:
- The
Concat method creates an iterator over both arrays: it does not create a new array, thus being efficient in terms of memory used: however, the subsequent ToArray will negate such advantage, since it will actually create a new array and take up the memory for the new array.
- As @Jodrell said,
Concat would be rather inefficient for large arrays: it should only be used for medium-sized arrays.
If aiming for performance is a must, the following method can be used instead:
/// <summary>
/// Concatenates two or more arrays into a single one.
/// </summary>
public static T[] Concat<T>(params T[][] arrays)
{
// return (from array in arrays from arr in array select arr).ToArray();
var result = new T[arrays.Sum(a => a.Length)];
int offset = 0;
for (int x = 0; x < arrays.Length; x++)
{
arrays[x].CopyTo(result, offset);
offset += arrays[x].Length;
}
return result;
}
Or (for one-liners fans):
int[] z = (from arrays in new[] { a, b, c } from arr in arrays select arr).ToArray();
Although the latter method is much more elegant, the former one is definitely better for performance.
For additional info, please refer to this post on my blog.
filename and line number of Python script
Handy if used in a common file - prints file name, line number and function of the caller:
import inspect
def getLineInfo():
print(inspect.stack()[1][1],":",inspect.stack()[1][2],":",
inspect.stack()[1][3])
How to remove spaces from a string using JavaScript?
Regex + Replace()
Although regex can be slower, in many use cases the developer is only manipulating a few strings at once so considering speed is irrelevant. Even though / / is faster than /\s/, having the '\s' explains what is going on to another developer perhaps more clearly.
let string = '/var/www/site/Brand new document.docx';
let path = string.replace(/\s/g, '');
// path => '/var/www/site/Brandnewdocument.docx'
Split() + Join()
Using Split + Join allows for further chained manipulation of the string.
let string = '/var/www/site/Brand new document.docx';
let path => string.split('').map(char => /(\s|\.)/.test(char) ? '/' : char).join('');
// "/var/www/site/Brand/new/document/docx";
React passing parameter via onclick event using ES6 syntax
I use the following code:
<Button onClick={this.onSubmit} id={item.key} value={shop.ethereum}>
Approve
</Button>
Then inside the method:
onSubmit = async event => {
event.preventDefault();
event.persist();
console.log("Param passed => Eth addrs: ", event.target.value)
console.log("Param passed => id: ", event.target.id)
...
}
As a result:
Param passed in event => Eth addrs: 0x4D86c35fdC080Ce449E89C6BC058E6cc4a4D49A6
Param passed in event => id: Mlz4OTBSwcgPLBzVZ7BQbwVjGip1
Convert SQL Server result set into string
The following is a solution for MySQL (not SQL Server), i couldn't easily find a solution to this on stackoverflow for mysql, so i figured maybe this could help someone...
ref: https://forums.mysql.com/read.php?10,285268,285286#msg-285286
original query...
SELECT StudentId FROM Student WHERE condition = xyz
original result set...
StudentId
1236
7656
8990
new query w/ concat...
SELECT group_concat(concat_ws(',', StudentId) separator '; ')
FROM Student
WHERE condition = xyz
concat string result set...
StudentId
1236; 7656; 8990
note: change the 'separator' to whatever you would like
GLHF!
How do you load custom UITableViewCells from Xib files?
Here's the class method that I've been using for creating custom cells out of XIBs:
+ (CustomCell*) createNewCustomCellFromNib {
NSArray* nibContents = [[NSBundle mainBundle]
loadNibNamed:@"CustomCell" owner:self options:NULL];
NSEnumerator *nibEnumerator = [nibContents objectEnumerator];
CustomCell *customCell= nil;
NSObject* nibItem = nil;
while ( (nibItem = [nibEnumerator nextObject]) != nil) {
if ( [nibItem isKindOfClass: [CustomCell class]]) {
customCell = (CustomCell*) nibItem;
if ([customCell.reuseIdentifier isEqualToString: @"CustomCell"]) {
break; // we have a winner
}
else
fuelEntryCell = nil;
}
}
return customCell;
}
Then, in the XIB, I set the class name, and reuse identifier. After that, I can just call that method in my view controller instead of the
[[UITableViewCell] alloc] initWithFrame:]
It's plenty fast enough, and being used in two of my shipping applications. It's more reliable than calling [nib objectAtIndex:0], and in my mind at least, more reliable than Stephan Burlot's example because you're guaranteed to only grab a view out of a XIB that is the right type.
Maximum Java heap size of a 32-bit JVM on a 64-bit OS
32-bit JVMs which expect to have a single large chunk of memory and use raw pointers cannot use more than 4 Gb (since that is the 32 bit limit which also applies to pointers). This includes Sun and - I'm pretty sure - also IBM implementations. I do not know if e.g. JRockit or others have a large memory option with their 32-bit implementations.
If you expect to be hitting this limit you should strongly consider starting a parallel track validating a 64-bit JVM for your production environment so you have that ready for when the 32-bit environment breaks down. Otherwise you will have to do that work under pressure, which is never nice.
Edit 2014-05-15: Oracle FAQ:
The maximum theoretical heap limit for the 32-bit JVM is 4G. Due to various additional constraints such as available swap, kernel address space usage, memory fragmentation, and VM overhead, in practice the limit can be much lower. On most modern 32-bit Windows systems the maximum heap size will range from 1.4G to 1.6G. On 32-bit Solaris kernels the address space is limited to 2G. On 64-bit operating systems running the 32-bit VM, the max heap size can be higher, approaching 4G on many Solaris systems.
(http://www.oracle.com/technetwork/java/hotspotfaq-138619.html#gc_heap_32bit)
Convert MySQL to SQlite
There is a mysql2sqlite.sh script on GitHub
As described in the header, the script can be used like this:
./mysql2sqlite.sh myDbase | sqlite3 database.sqlite
alternatives
How to make type="number" to positive numbers only
If you try to enter a negative number, the onkeyup event blocks this and if you use the arrow on the input number, the onblur event resolves that part.
_x000D_
_x000D_
<input type="number" _x000D_
onkeyup="if(this.value<0)this.value=1"_x000D_
onblur="if(this.value<0)this.value=1"_x000D_
>
_x000D_
_x000D_
_x000D_
Given an array of numbers, return array of products of all other numbers (no division)
My first try, in Python. O(2n):
def product(l):
product = 1
num_zeroes = 0
pos_zero = -1
# Multiply all and set positions
for i, x in enumerate(l):
if x != 0:
product *= x
l[i] = 1.0/x
else:
num_zeroes += 1
pos_zero = i
# Warning! Zeroes ahead!
if num_zeroes > 0:
l = [0] * len(l)
if num_zeroes == 1:
l[pos_zero] = product
else:
# Now set the definitive elements
for i in range(len(l)):
l[i] = int(l[i] * product)
return l
if __name__ == "__main__":
print("[0, 0, 4] = " + str(product([0, 0, 4])))
print("[3, 0, 4] = " + str(product([3, 0, 4])))
print("[1, 2, 3] = " + str(product([1, 2, 3])))
print("[2, 3, 4, 5, 6] = " + str(product([2, 3, 4, 5, 6])))
print("[2, 1, 2, 2, 3] = " + str(product([2, 1, 2, 2, 3])))
Output:
[0, 0, 4] = [0, 0, 0]
[3, 0, 4] = [0, 12, 0]
[1, 2, 3] = [6, 3, 2]
[2, 3, 4, 5, 6] = [360, 240, 180, 144, 120]
[2, 1, 2, 2, 3] = [12, 24, 12, 12, 8]
NuGet Package Restore Not Working
The best workaround that I found creating a new Project from scratch,
then import all the source files with the code.
My project was not so complicated so I had no problem from there.
Convert string to number and add one
Parse the Id as it would be string and then add.
e.g.
$('.load_more').live("click",function() { //When user clicks
var newcurrentpageTemp = parseInt($(this).attr("id")) + 1;//Get the id from the hyperlink
alert(newcurrentpageTemp);
dosomething();
});
GROUP BY having MAX date
Another way that doesn't use group by:
SELECT * FROM tblpm n
WHERE date_updated=(SELECT date_updated FROM tblpm n
ORDER BY date_updated desc LIMIT 1)
numbers not allowed (0-9) - Regex Expression in javascript
It is better to rely on regexps like ^[^0-9]+$ rather than on regexps like [a-zA-Z]+ as your app may one day accept user inputs from users speaking language like Polish, where many more characters should be accepted rather than only [a-zA-Z]+. Using ^[^0-9]+$ easily rules out any such undesired side effects.
Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int' warning
Change key in Project > Build Setting
"typecheck calls to printf/scanf : NO"
Explanation : [How it works]
Check calls to printf and scanf, etc., to make sure that the arguments supplied have types appropriate to the format string specified, and that the conversions specified in the format string make sense.
Hope it work
Other warning
objective c implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int
Change key "implicit conversion to 32Bits Type > Debug > *64 architecture : No"
[caution: It may void other warning of 64 Bits architecture conversion].
How can I switch views programmatically in a view controller? (Xcode, iPhone)
This worked for me:
NSTimer *switchTo = [NSTimer scheduledTimerWithTimeInterval:0.1
target:selfselector:@selector(switchToTimer)userInfo:nil repeats:NO];
- (void) switchToTimer {
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPad" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:@"MyViewControllerID"]; // Storyboard ID
[self presentViewController:vc animated:FALSE completion:nil];
}
How to update Ruby with Homebrew?
open terminal
\curl -sSL https://get.rvm.io | bash -s stable
restart terminal then
rvm install ruby-2.4.2
check ruby version it should be 2.4.2
Current user in Magento?
Found under "app/code/core/Mage/Page/Block/Html/Header.php":
public function getWelcome()
{
if (empty($this->_data['welcome'])) {
if (Mage::app()->isInstalled() && Mage::getSingleton('customer/session')->isLoggedIn()) {
$this->_data['welcome'] = $this->__('Welcome, %s!', Mage::getSingleton('customer/session')->getCustomer()->getName());
} else {
$this->_data['welcome'] = Mage::getStoreConfig('design/header/welcome');
}
}
return $this->_data['welcome'];
}
So it looks like Mage::getSingleton('customer/session')->getCustomer() will get your current logged in customer ;)
To get the currently logged in admin:
Mage::getSingleton('admin/session')->getUser();
Format date and Subtract days using Moment.js
var date = new Date();
var targetDate = moment(date).subtract(1, 'day').toDate(); // date object
Now, you can format how you wanna see this date or you can compare this date with another etc.
toDate() function is the point.
Getting value of HTML Checkbox from onclick/onchange events
The short answer:
Use the click event, which won't fire until after the value has been updated, and fires when you want it to:
<label><input type='checkbox' onclick='handleClick(this);'>Checkbox</label>
function handleClick(cb) {
display("Clicked, new value = " + cb.checked);
}
Live example | Source
The longer answer:
The change event handler isn't called until the checked state has been updated (live example | source), but because (as Tim Büthe points out in the comments) IE doesn't fire the change event until the checkbox loses focus, you don't get the notification proactively. Worse, with IE if you click a label for the checkbox (rather than the checkbox itself) to update it, you can get the impression that you're getting the old value (try it with IE here by clicking the label: live example | source). This is because if the checkbox has focus, clicking the label takes the focus away from it, firing the change event with the old value, and then the click happens setting the new value and setting focus back on the checkbox. Very confusing.
But you can avoid all of that unpleasantness if you use click instead.
I've used DOM0 handlers (onxyz attributes) because that's what you asked about, but for the record, I would generally recommend hooking up handlers in code (DOM2's addEventListener, or attachEvent in older versions of IE) rather than using onxyz attributes. That lets you attach multiple handlers to the same element and lets you avoid making all of your handlers global functions.
An earlier version of this answer used this code for handleClick:
function handleClick(cb) {
setTimeout(function() {
display("Clicked, new value = " + cb.checked);
}, 0);
}
The goal seemed to be to allow the click to complete before looking at the value. As far as I'm aware, there's no reason to do that, and I have no idea why I did. The value is changed before the click handler is called. In fact, the spec is quite clear about that. The version without setTimeout works perfectly well in every browser I've tried (even IE6). I can only assume I was thinking about some other platform where the change isn't done until after the event. In any case, no reason to do that with HTML checkboxes.
How to uninstall mini conda? python
To update @Sunil answer: Under Windows, Miniconda has a regular uninstaller. Go to the menu "Settings/Apps/Apps&Features", or click the Start button, type "uninstall", then click on "Add or Remove Programs" and finally on the Miniconda uninstaller.
A fast way to delete all rows of a datatable at once
That's the easiest way to delete all rows from the table in dbms via DataAdapter. But if you want to do it in one batch, you can set the DataAdapter's UpdateBatchSize to 0(unlimited).
Another way would be to use a simple SqlCommand with CommandText DELETE FROM Table:
using(var con = new SqlConnection(ConfigurationSettings.AppSettings["con"]))
using(var cmd = new SqlCommand())
{
cmd.CommandText = "DELETE FROM Table";
cmd.Connection = con;
con.Open();
int numberDeleted = cmd.ExecuteNonQuery(); // all rows deleted
}
But if you instead only want to remove the DataRows from the DataTable, you just have to call DataTable.Clear. That would prevent any rows from being deleted in dbms.
Java Web Service client basic authentication
It turned out that there's a simple, standard way to achieve what I wanted:
import java.net.Authenticator;
import java.net.PasswordAuthentication;
Authenticator myAuth = new Authenticator()
{
@Override
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication("german", "german".toCharArray());
}
};
Authenticator.setDefault(myAuth);
No custom "sun" classes or external dependencies, and no manually encode anything.
I'm aware that BASIC security is not, well, secure, but we are also using HTTPS.
What are the special dollar sign shell variables?
$1, $2, $3, ... are the positional parameters."$@" is an array-like construct of all positional parameters, {$1, $2, $3 ...}."$*" is the IFS expansion of all positional parameters, $1 $2 $3 ....$# is the number of positional parameters.$- current options set for the shell.$$ pid of the current shell (not subshell).$_ most recent parameter (or the abs path of the command to start the current shell immediately after startup).$IFS is the (input) field separator.$? is the most recent foreground pipeline exit status.$! is the PID of the most recent background command.$0 is the name of the shell or shell script.
Most of the above can be found under Special Parameters in the Bash Reference Manual. There are all the environment variables set by the shell.
For a comprehensive index, please see the Reference Manual Variable Index.
How do I split a string into an array of characters?
.split('') would split emojis in half.
Onur's solutions and the regex's proposed work for some emojis, but can't handle more complex languages or combined emojis.
Consider this emoji being ruined:
[..."??"] // returns ["", "?", "?", ""] instead of ["??"]
Also consider this Hindi text "????????" which is split like this:
[..."????????"] // returns ["?", "?", "?", "?", "?", "?", "?", "?"]
but should in fact be split like this:
["?","??","??","??","?"]
because some of the characters are combining marks (think diacritics/accents in European languages).
You can use the grapheme-splitter library for this:
https://github.com/orling/grapheme-splitter
It does proper standards-based letter split in all the hundreds of exotic edge-cases - yes, there are that many.
What is the difference between LATERAL and a subquery in PostgreSQL?
First, Lateral and Cross Apply is same thing. Therefore you may also read about Cross Apply. Since it was implemented in SQL Server for ages, you will find more information about it then Lateral.
Second, according to my understanding, there is nothing you can not do using subquery instead of using lateral. But:
Consider following query.
Select A.*
, (Select B.Column1 from B where B.Fk1 = A.PK and Limit 1)
, (Select B.Column2 from B where B.Fk1 = A.PK and Limit 1)
FROM A
You can use lateral in this condition.
Select A.*
, x.Column1
, x.Column2
FROM A LEFT JOIN LATERAL (
Select B.Column1,B.Column2,B.Fk1 from B Limit 1
) x ON X.Fk1 = A.PK
In this query you can not use normal join, due to limit clause.
Lateral or Cross Apply can be used when there is not simple join condition.
There are more usages for lateral or cross apply but this is most common one I found.
What is a lambda expression in C++11?
The problem
C++ includes useful generic functions like std::for_each and std::transform, which can be very handy. Unfortunately they can also be quite cumbersome to use, particularly if the functor you would like to apply is unique to the particular function.
#include <algorithm>
#include <vector>
namespace {
struct f {
void operator()(int) {
// do something
}
};
}
void func(std::vector<int>& v) {
f f;
std::for_each(v.begin(), v.end(), f);
}
If you only use f once and in that specific place it seems overkill to be writing a whole class just to do something trivial and one off.
In C++03 you might be tempted to write something like the following, to keep the functor local:
void func2(std::vector<int>& v) {
struct {
void operator()(int) {
// do something
}
} f;
std::for_each(v.begin(), v.end(), f);
}
however this is not allowed, f cannot be passed to a template function in C++03.
The new solution
C++11 introduces lambdas allow you to write an inline, anonymous functor to replace the struct f. For small simple examples this can be cleaner to read (it keeps everything in one place) and potentially simpler to maintain, for example in the simplest form:
void func3(std::vector<int>& v) {
std::for_each(v.begin(), v.end(), [](int) { /* do something here*/ });
}
Lambda functions are just syntactic sugar for anonymous functors.
Return types
In simple cases the return type of the lambda is deduced for you, e.g.:
void func4(std::vector<double>& v) {
std::transform(v.begin(), v.end(), v.begin(),
[](double d) { return d < 0.00001 ? 0 : d; }
);
}
however when you start to write more complex lambdas you will quickly encounter cases where the return type cannot be deduced by the compiler, e.g.:
void func4(std::vector<double>& v) {
std::transform(v.begin(), v.end(), v.begin(),
[](double d) {
if (d < 0.0001) {
return 0;
} else {
return d;
}
});
}
To resolve this you are allowed to explicitly specify a return type for a lambda function, using -> T:
void func4(std::vector<double>& v) {
std::transform(v.begin(), v.end(), v.begin(),
[](double d) -> double {
if (d < 0.0001) {
return 0;
} else {
return d;
}
});
}
"Capturing" variables
So far we've not used anything other than what was passed to the lambda within it, but we can also use other variables, within the lambda. If you want to access other variables you can use the capture clause (the [] of the expression), which has so far been unused in these examples, e.g.:
void func5(std::vector<double>& v, const double& epsilon) {
std::transform(v.begin(), v.end(), v.begin(),
[epsilon](double d) -> double {
if (d < epsilon) {
return 0;
} else {
return d;
}
});
}
You can capture by both reference and value, which you can specify using & and = respectively:
[&epsilon] capture by reference[&] captures all variables used in the lambda by reference[=] captures all variables used in the lambda by value[&, epsilon] captures variables like with [&], but epsilon by value[=, &epsilon] captures variables like with [=], but epsilon by reference
The generated operator() is const by default, with the implication that captures will be const when you access them by default. This has the effect that each call with the same input would produce the same result, however you can mark the lambda as mutable to request that the operator() that is produced is not const.
Add Variables to Tuple
Tuples are immutable; you can't change which variables they contain after construction. However, you can concatenate or slice them to form new tuples:
a = (1, 2, 3)
b = a + (4, 5, 6) # (1, 2, 3, 4, 5, 6)
c = b[1:] # (2, 3, 4, 5, 6)
And, of course, build them from existing values:
name = "Joe"
age = 40
location = "New York"
joe = (name, age, location)
Get value of a string after last slash in JavaScript
At least three ways:
A regular expression:
var result = /[^/]*$/.exec("foo/bar/test.html")[0];
...which says "grab the series of characters not containing a slash" ([^/]*) at the end of the string ($). Then it grabs the matched characters from the returned match object by indexing into it ([0]); in a match object, the first entry is the whole matched string. No need for capture groups.
Live example
Using lastIndexOf and substring:
var str = "foo/bar/test.html";
var n = str.lastIndexOf('/');
var result = str.substring(n + 1);
lastIndexOf does what it sounds like it does: It finds the index of the last occurrence of a character (well, string) in a string, returning -1 if not found. Nine times out of ten you probably want to check that return value (if (n !== -1)), but in the above since we're adding 1 to it and calling substring, we'd end up doing str.substring(0) which just returns the string.
Using Array#split
Sudhir and Tom Walters have this covered here and here, but just for completeness:
var parts = "foo/bar/test.html".split("/");
var result = parts[parts.length - 1]; // Or parts.pop();
split splits up a string using the given delimiter, returning an array.
The lastIndexOf / substring solution is probably the most efficient (although one always has to be careful saying anything about JavaScript and performance, since the engines vary so radically from each other), but unless you're doing this thousands of times in a loop, it doesn't matter and I'd strive for clarity of code.
Is it possible to 'prefill' a google form using data from a google spreadsheet?
You can create a pre-filled form URL from within the Form Editor, as described in the documentation for Drive Forms. You'll end up with a URL like this, for example:
https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=Mike+Jones&entry.787184751=1975-05-09&entry.1381372492&entry.960923899
buildUrls()
In this example, question 1, "Name", has an ID of 726721210, while question 2, "Birthday" is 787184751. Questions 3 and 4 are blank.
You could generate the pre-filled URL by adapting the one provided through the UI to be a template, like this:
function buildUrls() {
var template = "https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=##Name##&entry.787184751=##Birthday##&entry.1381372492&entry.960923899";
var ss = SpreadsheetApp.getActive().getSheetByName("Sheet1"); // Email, Name, Birthday
var data = ss.getDataRange().getValues();
// Skip headers, then build URLs for each row in Sheet1.
for (var i = 1; i < data.length; i++ ) {
var url = template.replace('##Name##',escape(data[i][1]))
.replace('##Birthday##',data[i][2].yyyymmdd()); // see yyyymmdd below
Logger.log(url); // You could do something more useful here.
}
};
This is effective enough - you could email the pre-filled URL to each person, and they'd have some questions already filled in.
betterBuildUrls()
Instead of creating our template using brute force, we can piece it together programmatically. This will have the advantage that we can re-use the code without needing to remember to change the template.
Each question in a form is an item. For this example, let's assume the form has only 4 questions, as you've described them. Item [0] is "Name", [1] is "Birthday", and so on.
We can create a form response, which we won't submit - instead, we'll partially complete the form, only to get the pre-filled form URL. Since the Forms API understands the data types of each item, we can avoid manipulating the string format of dates and other types, which simplifies our code somewhat.
(EDIT: There's a more general version of this in How to prefill Google form checkboxes?)
/**
* Use Form API to generate pre-filled form URLs
*/
function betterBuildUrls() {
var ss = SpreadsheetApp.getActive();
var sheet = ss.getSheetByName("Sheet1");
var data = ss.getDataRange().getValues(); // Data for pre-fill
var formUrl = ss.getFormUrl(); // Use form attached to sheet
var form = FormApp.openByUrl(formUrl);
var items = form.getItems();
// Skip headers, then build URLs for each row in Sheet1.
for (var i = 1; i < data.length; i++ ) {
// Create a form response object, and prefill it
var formResponse = form.createResponse();
// Prefill Name
var formItem = items[0].asTextItem();
var response = formItem.createResponse(data[i][1]);
formResponse.withItemResponse(response);
// Prefill Birthday
formItem = items[1].asDateItem();
response = formItem.createResponse(data[i][2]);
formResponse.withItemResponse(response);
// Get prefilled form URL
var url = formResponse.toPrefilledUrl();
Logger.log(url); // You could do something more useful here.
}
};
yymmdd Function
Any date item in the pre-filled form URL is expected to be in this format: yyyy-mm-dd. This helper function extends the Date object with a new method to handle the conversion.
When reading dates from a spreadsheet, you'll end up with a javascript Date object, as long as the format of the data is recognizable as a date. (Your example is not recognizable, so instead of May 9th 1975 you could use 5/9/1975.)
// From http://blog.justin.kelly.org.au/simple-javascript-function-to-format-the-date-as-yyyy-mm-dd/
Date.prototype.yyyymmdd = function() {
var yyyy = this.getFullYear().toString();
var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based
var dd = this.getDate().toString();
return yyyy + '-' + (mm[1]?mm:"0"+mm[0]) + '-' + (dd[1]?dd:"0"+dd[0]);
};
How to Find And Replace Text In A File With C#
You need to write all the lines you read into the output file, even if you don't change them.
Something like:
using (var input = File.OpenText("input.txt"))
using (var output = new StreamWriter("output.txt")) {
string line;
while (null != (line = input.ReadLine())) {
// optionally modify line.
output.WriteLine(line);
}
}
If you want to perform this operation in place then the easiest way is to use a temporary output file and at the end replace the input file with the output.
File.Delete("input.txt");
File.Move("output.txt", "input.txt");
(Trying to perform update operations in the middle of text file is rather hard to get right because always having the replacement the same length is hard given most encodings are variable width.)
EDIT: Rather than two file operations to replace the original file, better to use File.Replace("input.txt", "output.txt", null). (See MSDN.)
Ansible date variable
Note that the ansible command doesn't collect facts, but the ansible-playbook command does. When running ansible -m setup, the setup module happens to run the fact collection so you get the facts, but running ansible -m command does not. Therefore the facts aren't available. This is why the other answers include playbook YAML files and indicate the lookup works.
java.lang.ClassNotFoundException: HttpServletRequest
1 Right click on "your project" in Eclipse EE Project Explorer
2 Click on Properties
3 Click on Targeted Runtimes
4 Checkbox of the version you are currently working with
5 Apply and close
This should do the trick.
Java - How to find the redirected url of a url?
public static URL getFinalURL(URL url) {
try {
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setInstanceFollowRedirects(false);
con.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36");
con.addRequestProperty("Accept-Language", "en-US,en;q=0.8");
con.addRequestProperty("Referer", "https://www.google.com/");
con.connect();
//con.getInputStream();
int resCode = con.getResponseCode();
if (resCode == HttpURLConnection.HTTP_SEE_OTHER
|| resCode == HttpURLConnection.HTTP_MOVED_PERM
|| resCode == HttpURLConnection.HTTP_MOVED_TEMP) {
String Location = con.getHeaderField("Location");
if (Location.startsWith("/")) {
Location = url.getProtocol() + "://" + url.getHost() + Location;
}
return getFinalURL(new URL(Location));
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
return url;
}
To get "User-Agent" and "Referer" by yourself, just go to developer mode of one of your installed browser (E.g. press F12 on Google Chrome). Then go to tab 'Network' and then click on one of the requests. You should see it's details. Just press 'Headers' sub tab (the image below)
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'<>?,./
// The string must contain at least one special character, escaping reserved RegEx characters to avoid conflict
const hasSpecial = password => {
const specialReg = new RegExp(
'^(?=.*[!@#$%^&*"\\[\\]\\{\\}<>/\\(\\)=\\\\\\-_´+`~\\:;,\\.€\\|])',
);
return specialReg.test(password);
};
how to convert numeric to nvarchar in sql command
If the culture of the result doesn't matters or we're only talking of integer values, CONVERT or CAST will be fine.
However, if the result must match a specific culture, FORMAT might be the function to go:
DECLARE @value DECIMAL(19,4) = 1505.5698
SELECT CONVERT(NVARCHAR, @value) --> 1505.5698
SELECT FORMAT(@value, 'N2', 'en-us') --> 1,505.57
SELECT FORMAT(@value, 'N2', 'de-de') --> 1.505,57
For more information on FORMAT see here.
Of course, formatting the result should be a matter of the UI layer of the software.
How do you unit test private methods?
CC -Dprivate=public
"CC" is the command line compiler on the system I use. -Dfoo=bar does the equivalent of #define foo bar. So, this compilation option effectively changes all private stuff to public.
Installing Python 3 on RHEL
yum install python34.x86_64 works if you have epel-release installed, which this answer explains how to, and I confirmed it worked on RHEL 7.3
$ cat /etc/*-release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.3 (Maipo)
$ type python3
python3 is hashed (/usr/bin/python3)
SQL for ordering by number - 1,2,3,4 etc instead of 1,10,11,12
Sometimes you just don't have a choice about having to store numbers mixed with text. In one of our applications, the web site host we use for our e-commerce site makes filters dynamically out of lists. There is no option to sort by any field but the displayed text. When we wanted filters built off a list that said things like
2" to 8"
9" to 12"
13" to 15" etc, we needed it to sort 2-9-13, not 13-2-9 as it will when reading the numeric values. So I used the SQL Server Replicate function along with the length of the longest number to pad any shorter numbers with a leading space. Now 20 is sorted after 3, and so on.
I was working with a view that gave me the minimum and maximum lengths, widths, etc for the item type and class, and here is an example of how I did the text.
(LBnLow and LBnHigh are the Low and High end of the 5 length brackets.)
REPLICATE(' ', LEN(LB5Low) - LEN(LB1High)) + CONVERT(NVARCHAR(4), LB1High) + '" and Under' AS L1Text,
REPLICATE(' ', LEN(LB5Low) - LEN(LB2Low)) + CONVERT(NVARCHAR(4), LB2Low) + '" to ' + CONVERT(NVARCHAR(4), LB2High) + '"' AS L2Text,
REPLICATE(' ', LEN(LB5Low) - LEN(LB3Low)) + CONVERT(NVARCHAR(4), LB3Low) + '" to ' + CONVERT(NVARCHAR(4), LB3High) + '"' AS L3Text,
REPLICATE(' ', LEN(LB5Low) - LEN(LB4Low)) + CONVERT(NVARCHAR(4), LB4Low) + '" to ' + CONVERT(NVARCHAR(4), LB4High) + '"' AS L4Text,
CONVERT(NVARCHAR(4), LB5Low) + '" and Over' AS L5Text
What's the difference between `raw_input()` and `input()` in Python 3?
If You want to ensure, that your code is running with python2 and python3, use function input () in your script and add this to begin of your script:
from sys import version_info
if version_info.major == 3:
pass
elif version_info.major == 2:
try:
input = raw_input
except NameError:
pass
else:
print ("Unknown python version - input function not safe")
Convert an integer to a float number
There is no float type. Looks like you want float64. You could also use float32 if you only need a single-precision floating point value.
package main
import "fmt"
func main() {
i := 5
f := float64(i)
fmt.Printf("f is %f\n", f)
}
How do I set default value of select box in angularjs
<select ng-model="selectedCar" ><option ng-repeat="car in cars " value="{{car.model}}">{{car.model}}</option></select>
<script>var app = angular.module('myApp', []);app.controller('myCtrl', function($scope) { $scope.cars = [{model : "Ford Mustang", color : "red"}, {model : "Fiat 500", color : "white"},{model : "Volvo XC90", color : "black"}];
$scope.selectedCar=$scope.cars[0].model ;});
How to debug JavaScript / jQuery event bindings with Firebug or similar tools?
According to this thread, there is no way in Firebug to view what events are attached to listeners on a DOM element.
It looks like the best you can do is either what tj111 suggests, or you could right-click the element in the HTML viewer, and click "Log Events" so you can see which events are firing for a particular DOM element. I suppose one could do that to see what events could be firing off particular functions.
ArrayBuffer to base64 encoded string
var blob = new Blob([arrayBuffer])
var reader = new FileReader();
reader.onload = function(event){
var base64 = event.target.result
};
reader.readAsDataURL(blob);
find files by extension, *.html under a folder in nodejs
You can use OS help for this. Here is a cross-platform solution:
1. The bellow function uses ls and dir and does not search recursively but it has relative paths
var exec = require('child_process').exec;
function findFiles(folder,extension,cb){
var command = "";
if(/^win/.test(process.platform)){
command = "dir /B "+folder+"\\*."+extension;
}else{
command = "ls -1 "+folder+"/*."+extension;
}
exec(command,function(err,stdout,stderr){
if(err)
return cb(err,null);
//get rid of \r from windows
stdout = stdout.replace(/\r/g,"");
var files = stdout.split("\n");
//remove last entry because it is empty
files.splice(-1,1);
cb(err,files);
});
}
findFiles("folderName","html",function(err,files){
console.log("files:",files);
})
2. The bellow function uses find and dir, searches recursively but on windows it has absolute paths
var exec = require('child_process').exec;
function findFiles(folder,extension,cb){
var command = "";
if(/^win/.test(process.platform)){
command = "dir /B /s "+folder+"\\*."+extension;
}else{
command = 'find '+folder+' -name "*.'+extension+'"'
}
exec(command,function(err,stdout,stderr){
if(err)
return cb(err,null);
//get rid of \r from windows
stdout = stdout.replace(/\r/g,"");
var files = stdout.split("\n");
//remove last entry because it is empty
files.splice(-1,1);
cb(err,files);
});
}
findFiles("folder","html",function(err,files){
console.log("files:",files);
})
Null vs. False vs. 0 in PHP
One interesting fact about NULL in PHP: If you set a var equal to NULL, it is the same as if you had called unset() on it.
NULL essentially means a variable has no value assigned to it; false is a valid Boolean value, 0 is a valid integer value, and PHP has some fairly ugly conversions between 0, "0", "", and false.
UTF-8 all the way through
In addition to setting default_charset in php.ini, you can send the correct charset using header() from within your code, before any output:
header('Content-Type: text/html; charset=utf-8');
Working with Unicode in PHP is easy as long as you realize that most of the string functions don't work with Unicode, and some might mangle strings completely. PHP considers "characters" to be 1 byte long. Sometimes this is okay (for example, explode() only looks for a byte sequence and uses it as a separator -- so it doesn't matter what actual characters you look for). But other times, when the function is actually designed to work on characters, PHP has no idea that your text has multi-byte characters that are found with Unicode.
A good library to check into is phputf8. This rewrites all of the "bad" functions so you can safely work on UTF8 strings. There are extensions like the mbstring extension that try to do this for you, too, but I prefer using the library because it's more portable (but I write mass-market products, so that's important for me). But phputf8 can use mbstring behind the scenes, anyway, to increase performance.
How to get the absolute path to the public_html folder?
put anyfile on the directories you wanted to find, in this case, place 'root' at public_html
/home/user/public_html/root <- note that 'root' is not a folder (you can use root.txt if u want)
And use this function
function findThis($get){
$d = '';
for($i = 0; $i < 20; $i++){//this will try 20 times recursively on upper folder
if(file_exists($d.$get)){
return $d;
}else{
$d.="../";
}
}
}
and get the value by calling it
$pathToRoot = findThis('root');
And it will return, for example the the dir of php script is
/home/user/public_html/test/another-dir/test.php
so the $pathToRoot will be
$pathToRoot => "../../../"
Is this the one you want??
jQuery: get parent tr for selected radio button
Try this.
You don't need to prefix attribute name by @ in jQuery selector. Use closest() method to get the closest parent element matching the selector.
$("#MwDataList input[name=selectRadioGroup]:checked").closest('tr');
You can simplify your method like this
function getSelectedRowGuid() {
return GetRowGuid(
$("#MwDataList > input:radio[@name=selectRadioGroup]:checked :parent tr"));
}
closest() - Gets the first element that matches the selector, beginning at the current element and progressing up through the DOM tree.
As a side note, the ids of the elements should be unique on the page so try to avoid having same ids for radio buttons which I can see in your markup. If you are not going to use the ids then just remove it from the markup.
Displaying a message in iOS which has the same functionality as Toast in Android
Swift 4.0:
Make a new swift file . (File-New-File-Empty Swift File). Name it UIViewToast.Add the following Code.
import UIKit
func /(lhs: CGFloat, rhs: Int) -> CGFloat {
return lhs / CGFloat(rhs)
}
let HRToastDefaultDuration = 2.0
let HRToastFadeDuration = 0.2
let HRToastHorizontalMargin : CGFloat = 10.0
let HRToastVerticalMargin : CGFloat = 10.0
let HRToastPositionDefault = "bottom"
let HRToastPositionTop = "top"
let HRToastPositionCenter = "center"
// activity
let HRToastActivityWidth : CGFloat = 100.0
let HRToastActivityHeight : CGFloat = 100.0
let HRToastActivityPositionDefault = "center"
// image size
let HRToastImageViewWidth : CGFloat = 80.0
let HRToastImageViewHeight: CGFloat = 80.0
// label setting
let HRToastMaxWidth : CGFloat = 0.8; // 80% of parent view width
let HRToastMaxHeight : CGFloat = 0.8;
let HRToastFontSize : CGFloat = 16.0
let HRToastMaxTitleLines = 0
let HRToastMaxMessageLines = 0
// shadow appearance
let HRToastShadowOpacity : CGFloat = 0.8
let HRToastShadowRadius : CGFloat = 6.0
let HRToastShadowOffset : CGSize = CGSize(width: 4.0, height: 4.0)
let HRToastOpacity : CGFloat = 0.5
let HRToastCornerRadius : CGFloat = 10.0
var HRToastActivityView: UnsafePointer<UIView>?
var HRToastTimer: UnsafePointer<Timer>?
var HRToastView: UnsafePointer<UIView>?
// Color Scheme
let HRAppColor:UIColor = UIColor.black//UIappViewController().appUIColor
let HRAppColor_2:UIColor = UIColor.white
let HRToastHidesOnTap = true
let HRToastDisplayShadow = false
//HRToast (UIView + Toast using Swift)
extension UIView {
//public methods
func makeToast(message msg: String) {
self.makeToast(message: msg, duration: HRToastDefaultDuration, position: HRToastPositionDefault as AnyObject)
}
func makeToast(message msg: String, duration: Double, position: AnyObject) {
let toast = self.viewForMessage(msg: msg, title: nil, image: nil)
self.showToast(toast: toast!, duration: duration, position: position)
}
func makeToast(message msg: String, duration: Double, position: AnyObject, title: String) {
let toast = self.viewForMessage(msg: msg, title: title, image: nil)
self.showToast(toast: toast!, duration: duration, position: position)
}
func makeToast(message msg: String, duration: Double, position: AnyObject, image: UIImage) {
let toast = self.viewForMessage(msg: msg, title: nil, image: image)
self.showToast(toast: toast!, duration: duration, position: position)
}
func makeToast(message msg: String, duration: Double, position: AnyObject, title: String, image: UIImage) {
let toast = self.viewForMessage(msg: msg, title: title, image: image)
self.showToast(toast: toast!, duration: duration, position: position)
}
func showToast(toast: UIView) {
self.showToast(toast: toast, duration: HRToastDefaultDuration, position: HRToastPositionDefault as AnyObject)
}
func showToast(toast: UIView, duration: Double, position: AnyObject) {
let existToast = objc_getAssociatedObject(self, &HRToastView) as! UIView?
if existToast != nil {
if let timer: Timer = objc_getAssociatedObject(existToast!, &HRToastTimer) as? Timer {
timer.invalidate();
}
self.hideToast(toast: existToast!, force: false);
}
toast.center = self.centerPointForPosition(position: position, toast: toast)
toast.alpha = 0.0
if HRToastHidesOnTap {
let tapRecognizer = UITapGestureRecognizer(target: toast, action: #selector(handleToastTapped(recognizer:)))
toast.addGestureRecognizer(tapRecognizer)
toast.isUserInteractionEnabled = true;
toast.isExclusiveTouch = true;
}
self.addSubview(toast)
objc_setAssociatedObject(self, &HRToastView, toast, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN)
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0, options: ([.curveEaseOut, .allowUserInteraction]),
animations: {
toast.alpha = 1.0
},
completion: { (finished: Bool) in
let timer = Timer.scheduledTimer(timeInterval: duration, target: self, selector: #selector(self.toastTimerDidFinish(timer:)), userInfo: toast, repeats: false)
objc_setAssociatedObject(toast, &HRToastTimer, timer, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
})
}
func makeToastActivity() {
self.makeToastActivity(position: HRToastActivityPositionDefault as AnyObject)
}
func showToastActivity() {
self.isUserInteractionEnabled = false
self.makeToastActivity()
}
func removeToastActivity() {
self.isUserInteractionEnabled = true
self.hideToastActivity()
}
func makeToastActivityWithMessage(message msg: String){
self.makeToastActivity(position: HRToastActivityPositionDefault as AnyObject, message: msg)
}
func makeToastActivityWithMessage(message msg: String,addOverlay: Bool){
self.makeToastActivity(position: HRToastActivityPositionDefault as AnyObject, message: msg,addOverlay: true)
}
func makeToastActivity(position pos: AnyObject, message msg: String = "",addOverlay overlay: Bool = false) {
let existingActivityView: UIView? = objc_getAssociatedObject(self, &HRToastActivityView) as? UIView
if existingActivityView != nil { return }
let activityView = UIView(frame: CGRect(x:0, y:0, width: self.frame.width, height: self.frame.height))
activityView.center = self.centerPointForPosition(position: pos, toast: activityView)
activityView.alpha = 0.0
activityView.autoresizingMask = ([.flexibleLeftMargin, .flexibleTopMargin, .flexibleRightMargin, .flexibleBottomMargin])
activityView.layer.cornerRadius = HRToastCornerRadius
if HRToastDisplayShadow {
activityView.layer.shadowColor = UIColor.black.cgColor
activityView.layer.shadowOpacity = Float(HRToastShadowOpacity)
activityView.layer.shadowRadius = HRToastShadowRadius
activityView.layer.shadowOffset = HRToastShadowOffset
}
let activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
activityIndicatorView.center = CGPoint(x:activityView.bounds.size.width / 2, y: activityView.bounds.size.height / 2)
activityIndicatorView.color = HRAppColor
activityView.addSubview(activityIndicatorView)
activityIndicatorView.startAnimating()
if (!msg.isEmpty){
activityIndicatorView.frame.origin.y -= 10
let activityMessageLabel = UILabel(frame: CGRect(x: activityView.bounds.origin.x, y: (activityIndicatorView.frame.origin.y + activityIndicatorView.frame.size.height + 10), width: activityView.bounds.size.width, height: 20))
activityMessageLabel.textColor = UIColor.white
activityMessageLabel.font = (msg.count<=10) ? UIFont(name:activityMessageLabel.font.fontName, size: 16) : UIFont(name:activityMessageLabel.font.fontName, size: 16)
activityMessageLabel.textAlignment = .center
activityMessageLabel.text = msg + ".."
if overlay {
activityMessageLabel.textColor = UIColor.white
activityView.backgroundColor = HRAppColor.withAlphaComponent(HRToastOpacity)
activityIndicatorView.color = UIColor.white
}
else {
activityMessageLabel.textColor = HRAppColor
activityView.backgroundColor = UIColor.clear
activityIndicatorView.color = HRAppColor
}
activityView.addSubview(activityMessageLabel)
}
self.addSubview(activityView)
// associate activity view with self
objc_setAssociatedObject(self, &HRToastActivityView, activityView, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0,
options: UIViewAnimationOptions.curveEaseOut,
animations: {
activityView.alpha = 1.0
},
completion: nil)
self.isUserInteractionEnabled = false
}
func hideToastActivity() {
self.isUserInteractionEnabled = true
let existingActivityView = objc_getAssociatedObject(self, &HRToastActivityView) as! UIView?
if existingActivityView == nil { return }
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0,
options: UIViewAnimationOptions.curveEaseOut,
animations: {
existingActivityView!.alpha = 0.0
},
completion: { (finished: Bool) in
existingActivityView!.removeFromSuperview()
objc_setAssociatedObject(self, &HRToastActivityView, nil, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
})
}
/*
* private methods (helper)
*/
func hideToast(toast: UIView) {
self.isUserInteractionEnabled = true
self.hideToast(toast: toast, force: false);
}
func hideToast(toast: UIView, force: Bool) {
let completeClosure = { (finish: Bool) -> () in
toast.removeFromSuperview()
objc_setAssociatedObject(self, &HRToastTimer, nil, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
if force {
completeClosure(true)
} else {
UIView.animate(withDuration: HRToastFadeDuration,
delay: 0.0,
options: ([.curveEaseIn, .beginFromCurrentState]),
animations: {
toast.alpha = 0.0
},
completion:completeClosure)
}
}
@objc func toastTimerDidFinish(timer: Timer) {
self.hideToast(toast: timer.userInfo as! UIView)
}
@objc func handleToastTapped(recognizer: UITapGestureRecognizer) {
// var timer = objc_getAssociatedObject(self, &HRToastTimer) as! NSTimer
// timer.invalidate()
self.hideToast(toast: recognizer.view!)
}
func centerPointForPosition(position: AnyObject, toast: UIView) -> CGPoint {
if position is String {
let toastSize = toast.bounds.size
let viewSize = self.bounds.size
if position.lowercased == HRToastPositionTop {
return CGPoint(x: viewSize.width/2, y: toastSize.height/2 + HRToastVerticalMargin)
} else if position.lowercased == HRToastPositionDefault {
return CGPoint(x:viewSize.width/2, y:viewSize.height - toastSize.height - 15 - HRToastVerticalMargin)
} else if position.lowercased == HRToastPositionCenter {
return CGPoint(x:viewSize.width/2, y:viewSize.height/2)
}
} else if position is NSValue {
return position.cgPointValue
}
print("Warning: Invalid position for toast.")
return self.centerPointForPosition(position: HRToastPositionDefault as AnyObject, toast: toast)
}
func viewForMessage(msg: String?, title: String?, image: UIImage?) -> UIView? {
if msg == nil && title == nil && image == nil { return nil }
var msgLabel: UILabel?
var titleLabel: UILabel?
var imageView: UIImageView?
let wrapperView = UIView()
wrapperView.autoresizingMask = ([.flexibleLeftMargin, .flexibleRightMargin, .flexibleTopMargin, .flexibleBottomMargin])
wrapperView.layer.cornerRadius = HRToastCornerRadius
wrapperView.backgroundColor = UIColor.black.withAlphaComponent(HRToastOpacity)
if HRToastDisplayShadow {
wrapperView.layer.shadowColor = UIColor.black.cgColor
wrapperView.layer.shadowOpacity = Float(HRToastShadowOpacity)
wrapperView.layer.shadowRadius = HRToastShadowRadius
wrapperView.layer.shadowOffset = HRToastShadowOffset
}
if image != nil {
imageView = UIImageView(image: image)
imageView!.contentMode = .scaleAspectFit
imageView!.frame = CGRect(x:HRToastHorizontalMargin, y: HRToastVerticalMargin, width: CGFloat(HRToastImageViewWidth), height: CGFloat(HRToastImageViewHeight))
}
var imageWidth: CGFloat, imageHeight: CGFloat, imageLeft: CGFloat
if imageView != nil {
imageWidth = imageView!.bounds.size.width
imageHeight = imageView!.bounds.size.height
imageLeft = HRToastHorizontalMargin
} else {
imageWidth = 0.0; imageHeight = 0.0; imageLeft = 0.0
}
if title != nil {
titleLabel = UILabel()
titleLabel!.numberOfLines = HRToastMaxTitleLines
titleLabel!.font = UIFont.boldSystemFont(ofSize: HRToastFontSize)
titleLabel!.textAlignment = .center
titleLabel!.lineBreakMode = .byWordWrapping
titleLabel!.textColor = UIColor.white
titleLabel!.backgroundColor = UIColor.clear
titleLabel!.alpha = 1.0
titleLabel!.text = title
// size the title label according to the length of the text
let maxSizeTitle = CGSize(width: (self.bounds.size.width * HRToastMaxWidth) - imageWidth, height: self.bounds.size.height * HRToastMaxHeight)
let expectedHeight = title!.stringHeightWithFontSize(fontSize: HRToastFontSize, width: maxSizeTitle.width)
titleLabel!.frame = CGRect(x: 0.0, y: 0.0, width: maxSizeTitle.width, height: expectedHeight)
}
if msg != nil {
msgLabel = UILabel();
msgLabel!.numberOfLines = HRToastMaxMessageLines
msgLabel!.font = UIFont.systemFont(ofSize: HRToastFontSize)
msgLabel!.lineBreakMode = .byWordWrapping
msgLabel!.textAlignment = .center
msgLabel!.textColor = UIColor.white
msgLabel!.backgroundColor = UIColor.clear
msgLabel!.alpha = 1.0
msgLabel!.text = msg
let maxSizeMessage = CGSize(width: (self.bounds.size.width * HRToastMaxWidth) - imageWidth, height: self.bounds.size.height * HRToastMaxHeight)
let expectedHeight = msg!.stringHeightWithFontSize(fontSize: HRToastFontSize, width: maxSizeMessage.width)
msgLabel!.frame = CGRect(x: 0.0, y: 0.0, width: maxSizeMessage.width, height: expectedHeight)
}
var titleWidth: CGFloat, titleHeight: CGFloat, titleTop: CGFloat, titleLeft: CGFloat
if titleLabel != nil {
titleWidth = titleLabel!.bounds.size.width
titleHeight = titleLabel!.bounds.size.height
titleTop = HRToastVerticalMargin
titleLeft = imageLeft + imageWidth + HRToastHorizontalMargin
} else {
titleWidth = 0.0; titleHeight = 0.0; titleTop = 0.0; titleLeft = 0.0
}
var msgWidth: CGFloat, msgHeight: CGFloat, msgTop: CGFloat, msgLeft: CGFloat
if msgLabel != nil {
msgWidth = msgLabel!.bounds.size.width
msgHeight = msgLabel!.bounds.size.height
msgTop = titleTop + titleHeight + HRToastVerticalMargin
msgLeft = imageLeft + imageWidth + HRToastHorizontalMargin
} else {
msgWidth = 0.0; msgHeight = 0.0; msgTop = 0.0; msgLeft = 0.0
}
let largerWidth = max(titleWidth, msgWidth)
let largerLeft = max(titleLeft, msgLeft)
// set wrapper view's frame
let wrapperWidth = max(imageWidth + HRToastHorizontalMargin * 2, largerLeft + largerWidth + HRToastHorizontalMargin)
let wrapperHeight = max(msgTop + msgHeight + HRToastVerticalMargin, imageHeight + HRToastVerticalMargin * 2)
wrapperView.frame = CGRect(x: 0.0, y: 0.0, width: wrapperWidth, height: wrapperHeight)
// add subviews
if titleLabel != nil {
titleLabel!.frame = CGRect(x: titleLeft, y: titleTop, width: titleWidth, height: titleHeight)
wrapperView.addSubview(titleLabel!)
}
if msgLabel != nil {
msgLabel!.frame = CGRect(x: msgLeft, y: msgTop, width: msgWidth, height: msgHeight)
wrapperView.addSubview(msgLabel!)
}
if imageView != nil {
wrapperView.addSubview(imageView!)
}
return wrapperView
}
}
extension String {
func stringHeightWithFontSize(fontSize: CGFloat,width: CGFloat) -> CGFloat {
let font = UIFont.systemFont(ofSize: fontSize)
let size = CGSize(width: width, height: CGFloat.greatestFiniteMagnitude)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineBreakMode = .byWordWrapping;
let attributes = [NSAttributedStringKey.font:font,
NSAttributedStringKey.paragraphStyle:paragraphStyle.copy()]
let text = self as NSString
let rect = text.boundingRect(with: size, options:.usesLineFragmentOrigin, attributes: attributes, context:nil)
return rect.size.height
}
}
Usage:
self.view.makeToast(message: "Simple Toast")
self.view.makeToast(message: "Simple Toast", duration: 2.0, position:HRToastPositionTop)
self.view.makeToast(message: "Simple Toast", duration: 2.0, position: HRToastPositionCenter, image: UIImage(named: "ic_120x120")!)
self.view.makeToast(message: "It is just awesome", duration: 2.0, position: HRToastPositionDefault, title: "Simple Toast")
self.view.makeToast(message: "It is just awesome", duration: 2.0, position: HRToastPositionCenter, title: "Simple Toast", image: UIImage(named: "ic_120x120")!)
self.view.makeToastActivity()
self.view.makeToastActivity(position: HRToastPositionCenter)
self.view.makeToastActivity(position: HRToastPositionDefault, message: "Loading")
self.view.makeToastActivityWithMessage(message: "Loading")
// Hide Toast
self.view.hideToast(toast: self.view)
self.view.hideToast(toast: self.view, force: true)
self.view.hideToastActivity()
CSS Select box arrow style
Please follow the way like below:
_x000D_
_x000D_
.selectParent {_x000D_
width:120px;_x000D_
overflow:hidden; _x000D_
}_x000D_
.selectParent select { _x000D_
display: block;_x000D_
width: 100%;_x000D_
padding: 2px 25px 2px 2px; _x000D_
border: none; _x000D_
background: url("http://cdn1.iconfinder.com/data/icons/cc_mono_icon_set/blacks/16x16/br_down.png") right center no-repeat; _x000D_
appearance: none; _x000D_
-webkit-appearance: none;_x000D_
-moz-appearance: none; _x000D_
}_x000D_
.selectParent.left select {_x000D_
direction: rtl;_x000D_
padding: 2px 2px 2px 25px;_x000D_
background-position: left center;_x000D_
}_x000D_
/* for IE and Edge */ _x000D_
select::-ms-expand { _x000D_
display: none; _x000D_
}
_x000D_
<div class="selectParent">_x000D_
<select>_x000D_
<option value="1">Option 1</option>_x000D_
<option value="2">Option 2</option> _x000D_
</select>_x000D_
</div>_x000D_
<br />_x000D_
<div class="selectParent left">_x000D_
<select>_x000D_
<option value="1">Option 1</option>_x000D_
<option value="2">Option 2</option> _x000D_
</select>_x000D_
</div>
_x000D_
_x000D_
_x000D_
PowerShell: Format-Table without headers
Another approach is to use ForEach-Object to project individual items to a string and then use the Out-String CmdLet to project the final results to a string or string array:
gci Microsoft.PowerShell.Core\Registry::HKEY_CLASSES_ROOT\CID | foreach { "CID Key {0}" -f $_.Name } | Out-String
#Result: One multi-line string equal to:
@"
CID Key HKEY_CLASSES_ROOT\CID\2a621c8a-7d4b-4d7b-ad60-a957fd70b0d0
CID Key HKEY_CLASSES_ROOT\CID\2ec6f5b2-8cdc-461e-9157-ffa84c11ba7d
CID Key HKEY_CLASSES_ROOT\CID\5da2ceaf-bc35-46e0-aabd-bd826023359b
CID Key HKEY_CLASSES_ROOT\CID\d13ad82e-d4fb-495f-9b78-01d2946e6426
"@
gci Microsoft.PowerShell.Core\Registry::HKEY_CLASSES_ROOT\CID | foreach { "CID Key {0}" -f $_.Name } | Out-String -Stream
#Result: An array of single line strings equal to:
@(
"CID Key HKEY_CLASSES_ROOT\CID\2a621c8a-7d4b-4d7b-ad60-a957fd70b0d0",
"CID Key HKEY_CLASSES_ROOT\CID\2ec6f5b2-8cdc-461e-9157-ffa84c11ba7d",
"CID Key HKEY_CLASSES_ROOT\CID\5da2ceaf-bc35-46e0-aabd-bd826023359b",
"CID Key HKEY_CLASSES_ROOT\CID\d13ad82e-d4fb-495f-9b78-01d2946e6426")
The benefit of this approach is that you can store the result to a variable and it will NOT have any empty lines.
With ng-bind-html-unsafe removed, how do I inject HTML?
Strict Contextual Escaping can be disabled entirely, allowing you to inject html using ng-html-bind. This is an unsafe option, but helpful when testing.
Example from the AngularJS documentation on $sce:
angular.module('myAppWithSceDisabledmyApp', []).config(function($sceProvider) {
// Completely disable SCE. For demonstration purposes only!
// Do not use in new projects.
$sceProvider.enabled(false);
});
Attaching the above config section to your app will allow you inject html into ng-html-bind, but as the doc remarks:
SCE gives you a lot of security benefits for little coding overhead.
It will be much harder to take an SCE disabled application and either
secure it on your own or enable SCE at a later stage. It might make
sense to disable SCE for cases where you have a lot of existing code
that was written before SCE was introduced and you're migrating them a
module at a time.
struct in class
If you give the struct no name it will work
class E
{
public:
struct
{
int v;
};
};
Otherwise write X x and write e.x.v
How to round a number to n decimal places in Java
I came here just wanting a simple answer on how to round a number. This is a supplemental answer to provide that.
How to round a number in Java
The most common case is to use Math.round().
Math.round(3.7) // 4
Numbers are rounded to the nearest whole number. A .5 value is rounded up. If you need different rounding behavior than that, you can use one of the other Math functions. See the comparison below.
As stated above, this rounds to the nearest whole number. .5 decimals round up. This method returns an int.
Math.round(3.0); // 3
Math.round(3.1); // 3
Math.round(3.5); // 4
Math.round(3.9); // 4
Math.round(-3.0); // -3
Math.round(-3.1); // -3
Math.round(-3.5); // -3 *** careful here ***
Math.round(-3.9); // -4
Any decimal value is rounded up to the next integer. It goes to the ceiling. This method returns a double.
Math.ceil(3.0); // 3.0
Math.ceil(3.1); // 4.0
Math.ceil(3.5); // 4.0
Math.ceil(3.9); // 4.0
Math.ceil(-3.0); // -3.0
Math.ceil(-3.1); // -3.0
Math.ceil(-3.5); // -3.0
Math.ceil(-3.9); // -3.0
Any decimal value is rounded down to the next integer. This method returns a double.
Math.floor(3.0); // 3.0
Math.floor(3.1); // 3.0
Math.floor(3.5); // 3.0
Math.floor(3.9); // 3.0
Math.floor(-3.0); // -3.0
Math.floor(-3.1); // -4.0
Math.floor(-3.5); // -4.0
Math.floor(-3.9); // -4.0
This is similar to round in that decimal values round to the closest integer. However, unlike round, .5 values round to the even integer. This method returns a double.
Math.rint(3.0); // 3.0
Math.rint(3.1); // 3.0
Math.rint(3.5); // 4.0 ***
Math.rint(3.9); // 4.0
Math.rint(4.5); // 4.0 ***
Math.rint(5.5); // 6.0 ***
Math.rint(-3.0); // -3.0
Math.rint(-3.1); // -3.0
Math.rint(-3.5); // -4.0 ***
Math.rint(-3.9); // -4.0
Math.rint(-4.5); // -4.0 ***
Math.rint(-5.5); // -6.0 ***
How to parse JSON with VBA without external libraries?
There are two issues here. The first is to access fields in the array returned by your JSON parse, the second is to rename collections/fields (like sentences) away from VBA reserved names.
Let's address the second concern first. You were on the right track. First, replace all instances of sentences with jsentences If text within your JSON also contains the word sentences, then figure out a way to make the replacement unique, such as using "sentences":[ as the search string. You can use the VBA Replace method to do this.
Once that's done, so VBA will stop renaming sentences to Sentences, it's just a matter of accessing the array like so:
'first, declare the variables you need:
Dim jsent as Variant
'Get arr all setup, then
For Each jsent in arr.jsentences
MsgBox(jsent.orig)
Next
How to add multiple classes to a ReactJS Component?
This is how you can do that with ES6:
className = {`
text-right
${itemId === activeItemId ? 'active' : ''}
${anotherProperty === true ? 'class1' : 'class2'}
`}
You can list multiple classes and conditions and also you can include static classes. It is not necessary to add an additional library.
Good luck ;)
Correct way to pass multiple values for same parameter name in GET request
Indeed, there is no defined standard. To support that information, have a look at wikipedia, in the Query String chapter. There is the following comment:
While there is no definitive standard, most web frameworks allow
multiple values to be associated with a single field.[3][4]
Furthermore, when you take a look at the RFC 3986, in section 3.4 Query, there is no definition for parameters with multiple values.
Most applications use the first option you have shown: http://server/action?id=a&id=b. To support that information, take a look at this Stackoverflow link, and this MSDN link regarding ASP.NET applications, which use the same standard for parameters with multiple values.
However, since you are developing the APIs, I suggest you to do what is the easiest for you, since the caller of the API will not have much trouble creating the query string.
What is the difference between a web API and a web service?
A web service typically offers a WSDL from which you can create client stubs automatically. Web Services are based on the SOAP protocol.
ASP.NET Web API is a newer Microsoft framework which helps you to build REST based interfaces. The response can be either JSON or XML, but there is no way to generate clients automatically because Web API does not offer a service description like the WSDL from Web Services.
So it depends on your requirements which one of the techniques you want to use. Perhaps even WCF fits your requirements better, just look at the MSDN documentation.
How to prevent a jQuery Ajax request from caching in Internet Explorer?
you can define it like this :
let table = $('.datatable-sales').DataTable({
processing: true,
responsive: true,
serverSide: true,
ajax: {
url: "<?php echo site_url("your url"); ?>",
cache: false,
type: "POST",
data: {
<?php echo your api; ?>,
}
}
or like this :
$.get({url: <?php echo json_encode(site_url('your api'))?>, cache: false})
hope it helps
byte array to pdf
Usually this happens if something is wrong with the byte array.
File.WriteAllBytes("filename.PDF", Byte[]);
This creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.
Asynchronous implementation of this is also available.
public static System.Threading.Tasks.Task WriteAllBytesAsync
(string path, byte[] bytes, System.Threading.CancellationToken cancellationToken = null);
SQL query with avg and group by
If I understand what you need, try this:
SELECT id, pass, AVG(val) AS val_1
FROM data_r1
GROUP BY id, pass;
Or, if you want just one row for every id, this:
SELECT d1.id,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 1) as val_1,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 2) as val_2,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 3) as val_3,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 4) as val_4,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 5) as val_5,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 6) as val_6,
(SELECT IFNULL(ROUND(AVG(d2.val), 4) ,0) FROM data_r1 d2
WHERE d2.id = d1.id AND pass = 7) as val_7
from data_r1 d1
GROUP BY d1.id
Getting error while sending email through Gmail SMTP - "Please log in via your web browser and then try again. 534-5.7.14"
There are at least these two issues I have observed for this problem:
1) It could be either because your sender username or password might not be correct
2) Or it could be as answered by Avinash above, the security condition on the account. Once you try SendMail using SMTP, you normally get a notification in to your account that it may be an unauthorized attempt to access your account, if not user can follow the link to turn the settings to lessSecureApp. Once this is done and smtp SendMail is tried again, it works.
How to loop through a directory recursively to delete files with certain extensions
This method handles spaces well.
files="$(find -L "$dir" -type f)"
echo "Count: $(echo -n "$files" | wc -l)"
echo "$files" | while read file; do
echo "$file"
done
Edit, fixes off-by-one
function count() {
files="$(find -L "$1" -type f)";
if [[ "$files" == "" ]]; then
echo "No files";
return 0;
fi
file_count=$(echo "$files" | wc -l)
echo "Count: $file_count"
echo "$files" | while read file; do
echo "$file"
done
}
pointer to array c++
j[0]; dereferences a pointer to int, so its type is int.
(*j)[0] has no type. *j dereferences a pointer to an int, so it returns an int, and (*j)[0] attempts to dereference an int. It's like attempting int x = 8; x[0];.
Required attribute HTML5
Just put the following below your form. Make sure your input fields are required.
<script>
var forms = document.getElementsByTagName('form');
for (var i = 0; i < forms.length; i++) {
forms[i].noValidate = true;
forms[i].addEventListener('submit', function(event) {
if (!event.target.checkValidity()) {
event.preventDefault();
alert("Please complete all fields and accept the terms.");
}
}, false);
}
</script>
Python - How to convert JSON File to Dataframe
There are 2 inputs you might have and you can also convert between them.
- input: listOfDictionaries --> use @VikashSingh solution
example: [{"":{"...
The pd.DataFrame() needs a listOfDictionaries as input.
- input: jsonStr --> use @JustinMalinchak solution
example: '{"":{"...
If you have jsonStr, you need an extra step to listOfDictionaries first. This is obvious as it is generated like:
jsonStr = json.dumps(listOfDictionaries)
Thus, switch back from jsonStr to listOfDictionaries first:
listOfDictionaries = json.loads(jsonStr)
How do I close a tkinter window?
you only need to type this:
root.destroy()
and you don't even need the quit() function cause when you set that as commmand it will quit the entire program.
rails generate model
The code is okay but you are in the wrong directory. You must run these commands inside your rails project-directory.
The normal way to get there from scratch is:
$ rails new PROJECT_NAME
$ cd PROJECT_NAME
$ rails generate model ad \
name:string \
description:text \
price:decimal \
seller_id:integer \
email:string img_url:string
PHP to search within txt file and echo the whole line
one way...
$needle = "blah";
$content = file_get_contents('file.txt');
preg_match('~^(.*'.$needle.'.*)$~',$content,$line);
echo $line[1];
though it would probably be better to read it line by line with fopen() and fread() and use strpos()
bash: pip: command not found
Installing using apt-get installs a system wide pip, not just a local one for your user. Try this command to get pip running on your system ...
$ sudo apt-get install python-pip python-dev build-essential
Then pip will be installed without any issues and you will be able to use "sudo pip...".
Font-awesome, input type 'submit'
Well, technically it's not possible to get :before and :after pseudo elements work on input elements
From W3C:
12.1 The :before and :after pseudo-elements
Authors specify the style and location of generated content with the
:before and :after pseudo-elements. As their names indicate, the
:before and :after pseudo-elements specify the location of content
before and after an element's document tree content. The 'content'
property, in conjunction with these pseudo-elements, specifies what is
inserted.
So I had a project where I had submit buttons in the form of input tags and for some reason the other developers restricted me to use <button> tags instead of the usual input submit buttons, so I came up with another solution, of wrapping the buttons inside a span set to position: relative; and then absolutely positioning the icon using :after pseudo.
Note: The demo fiddle uses the content code for FontAwesome 3.2.1 so
you may need to change the value of content property accordingly.
HTML
<span><input type="submit" value="Send" class="btn btn-default" /></span>
CSS
input[type="submit"] {
margin: 10px;
padding-right: 30px;
}
span {
position: relative;
}
span:after {
font-family: FontAwesome;
content: "\f004"; /* Value may need to be changed in newer version of font awesome*/
font-size: 13px;
position: absolute;
right: 20px;
top: 1px;
pointer-events: none;
}
Demo
Now here everything is self explanatory here, about one property i.e pointer-events: none;, I've used that because on hovering over the :after pseudo generated content, your button won't click, so using the value of none will force the click action to go pass through that content.
From Mozilla Developer Network :
In addition to indicating that the element is not the target of mouse
events, the value none instructs the mouse event to go "through" the
element and target whatever is "underneath" that element instead.
Hover the heart font/icon Demo and see what happens if you DON'T use pointer-events: none;
Java: Rotating Images
Sorry, but all the answers are difficult to understand for me as a beginner in graphics...
After some fiddling, this is working for me and it is easy to reason about.
@Override
public void draw(Graphics2D g) {
AffineTransform tr = new AffineTransform();
// X and Y are the coordinates of the image
tr.translate((int)getX(), (int)getY());
tr.rotate(
Math.toRadians(this.rotationAngle),
img.getWidth() / 2,
img.getHeight() / 2
);
// img is a BufferedImage instance
g.drawImage(img, tr, null);
}
I suppose that if you want to rotate a rectangular image this method wont work and will cut the image, but I thing you should create square png images and rotate that.
Create a directory if it does not exist and then create the files in that directory as well
I would suggest the following for Java8+.
/**
* Creates a File if the file does not exist, or returns a
* reference to the File if it already exists.
*/
private File createOrRetrieve(final String target) throws IOException{
final Path path = Paths.get(target);
if(Files.notExists(path)){
LOG.info("Target file \"" + target + "\" will be created.");
return Files.createFile(Files.createDirectories(path)).toFile();
}
LOG.info("Target file \"" + target + "\" will be retrieved.");
return path.toFile();
}
/**
* Deletes the target if it exists then creates a new empty file.
*/
private File createOrReplaceFileAndDirectories(final String target) throws IOException{
final Path path = Paths.get(target);
// Create only if it does not exist already
Files.walk(path)
.filter(p -> Files.exists(p))
.sorted(Comparator.reverseOrder())
.peek(p -> LOG.info("Deleted existing file or directory \"" + p + "\"."))
.forEach(p -> {
try{
Files.createFile(Files.createDirectories(p));
}
catch(IOException e){
throw new IllegalStateException(e);
}
});
LOG.info("Target file \"" + target + "\" will be created.");
return Files.createFile(
Files.createDirectories(path)
).toFile();
}
Using C++ base class constructors?
No, that's not how it is done. Normal way to initialize the base class is in the initialization list :
class A
{
public:
A(int val) {}
};
class B : public A
{
public:
B( int v) : A( v )
{
}
};
void main()
{
B b(10);
}
Help with packages in java - import does not work
Okay, just to clarify things that have already been posted.
You should have the directory com, containing the directory company, containing the directory example, containing the file MyClass.java.
From the folder containing com, run:
$ javac com\company\example\MyClass.java
Then:
$ java com.company.example.MyClass
Hello from MyClass!
These must both be done from the root of the source tree. Otherwise, javac and java won't be able to find any other packages (in fact, java wouldn't even be able to run MyClass).
A short example
I created the folders "testpackage" and "testpackage2". Inside testpackage, I created TestPackageClass.java containing the following code:
package testpackage;
import testpackage2.MyClass;
public class TestPackageClass {
public static void main(String[] args) {
System.out.println("Hello from testpackage.TestPackageClass!");
System.out.println("Now accessing " + MyClass.NAME);
}
}
Inside testpackage2, I created MyClass.java containing the following code:
package testpackage2;
public class MyClass {
public static String NAME = "testpackage2.MyClass";
}
From the directory containing the two new folders, I ran:
C:\examples>javac testpackage\*.java
C:\examples>javac testpackage2\*.java
Then:
C:\examples>java testpackage.TestPackageClass
Hello from testpackage.TestPackageClass!
Now accessing testpackage2.MyClass
Does that make things any clearer?
AngularJS: No "Access-Control-Allow-Origin" header is present on the requested resource
CORS is Cross Origin Resource Sharing, you get this error if you are trying to access from one domain to another domain.
Try using JSONP. In your case, JSONP should work fine because it only uses the GET method.
Try something like this:
var url = "https://api.getevents.co/event?&lat=41.904196&lng=12.465974";
$http({
method: 'JSONP',
url: url
}).
success(function(status) {
//your code when success
}).
error(function(status) {
//your code when fails
});
How to import functions from different js file in a Vue+webpack+vue-loader project
After a few hours of messing around I eventually got something that works, partially answered in a similar issue here: How do I include a JavaScript file in another JavaScript file?
BUT there was an import that was screwing the rest of it up:
Use require in .vue files
<script>
var mylib = require('./mylib');
export default {
....
Exports in mylib
exports.myfunc = () => {....}
Avoid import
The actual issue in my case (which I didn't think was relevant!) was that mylib.js was itself using other dependencies. The resulting error seems to have nothing to do with this, and there was no transpiling error from webpack but anyway I had:
import models from './model/models'
import axios from 'axios'
This works so long as I'm not using mylib in a .vue component. However as soon as I use mylib there, the error described in this issue arises.
I changed to:
let models = require('./model/models');
let axios = require('axios');
And all works as expected.
Javascript: How to generate formatted easy-to-read JSON straight from an object?
JSON.stringify takes more optional arguments.
Try:
JSON.stringify({a:1,b:2,c:{d:1,e:[1,2]}}, null, 4); // Indented 4 spaces
JSON.stringify({a:1,b:2,c:{d:1,e:[1,2]}}, null, "\t"); // Indented with tab
From:
How can I beautify JSON programmatically?
Should work in modern browsers, and it is included in json2.js if you need a fallback for browsers that don't support the JSON helper functions. For display purposes, put the output in a <pre> tag to get newlines to show.
SQL server query to get the list of columns in a table along with Data types, NOT NULL, and PRIMARY KEY constraints
To avoid duplicate rows for some columns, use user_type_id instead of system_type_id.
SELECT
c.name 'Column Name',
t.Name 'Data type',
c.max_length 'Max Length',
c.precision ,
c.scale ,
c.is_nullable,
ISNULL(i.is_primary_key, 0) 'Primary Key'
FROM
sys.columns c
INNER JOIN
sys.types t ON c.user_type_id = t.user_type_id
LEFT OUTER JOIN
sys.index_columns ic ON ic.object_id = c.object_id AND ic.column_id = c.column_id
LEFT OUTER JOIN
sys.indexes i ON ic.object_id = i.object_id AND ic.index_id = i.index_id
WHERE
c.object_id = OBJECT_ID('YourTableName')
Just replace YourTableName with your actual table name - works for SQL Server 2005 and up.
In case you are using schemas, replace YourTableName by YourSchemaName.YourTableName where YourSchemaName is the actual schema name and YourTableName is the actual table name.
Can't install APK from browser downloads
It shouldn't be HTTP headers if the file has been downloaded successfully and it's the same file that you can open from OI.
A shot in the dark, but could it be that you are not allowing installation from unknown sources, and that OI is somehow bypassing that?
Settings > Applications > Unknown sources...
Edit
Answer extracted from comments which worked. Ensure the Content-Type is set to application/vnd.android.package-archive
Reset textbox value in javascript
With jQuery, I've found that sometimes using val to clear the value of a textbox has no effect, in those situations I've found that using attr does the job
$('#searchField').attr("value", "");
How to get the current date and time of your timezone in Java?
I couldn't get it to work using Calendar. You have to use DateFormat
//Wednesday, July 20, 2011 3:54:44 PM PDT
DateFormat df = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL);
df.setTimeZone(TimeZone.getTimeZone("PST"));
final String dateTimeString = df.format(new Date());
//Wednesday, July 20, 2011
df = DateFormat.getDateInstance(DateFormat.FULL);
df.setTimeZone(TimeZone.getTimeZone("PST"));
final String dateString = df.format(new Date());
//3:54:44 PM PDT
df = DateFormat.getTimeInstance(DateFormat.FULL);
df.setTimeZone(Timezone.getTimeZone("PST"));
final String timeString = df.format(new Date());
How can I consume a WSDL (SOAP) web service in Python?
I recently stumbled up on the same problem. Here is the synopsis of my solution:
Basic constituent code blocks needed
The following are the required basic code blocks of your client application
- Session request section: request a session with the provider
- Session authentication section: provide credentials to the provider
- Client section: create the Client
- Security Header section: add the WS-Security Header to the Client
- Consumption section: consume available operations (or methods) as needed
What modules do you need?
Many suggested to use Python modules such as urllib2 ; however, none of the modules work-at least for this particular project.
So, here is the list of the modules you need to get.
First of all, you need to download and install the latest version of suds from the following link:
pypi.python.org/pypi/suds-jurko/0.4.1.jurko.2
Additionally, you need to download and install requests and suds_requests modules from the following links respectively ( disclaimer: I am new to post in here, so I can't post more than one link for now).
pypi.python.org/pypi/requests
pypi.python.org/pypi/suds_requests/0.1
Once you successfully download and install these modules, you are good to go.
The code
Following the steps outlined earlier, the code looks like the following:
Imports:
import logging
from suds.client import Client
from suds.wsse import *
from datetime import timedelta,date,datetime,tzinfo
import requests
from requests.auth import HTTPBasicAuth
import suds_requests
Session request and authentication:
username=input('Username:')
password=input('password:')
session = requests.session()
session.auth=(username, password)
Create the Client:
client = Client(WSDL_URL, faults=False, cachingpolicy=1, location=WSDL_URL, transport=suds_requests.RequestsTransport(session))
Add WS-Security Header:
...
addSecurityHeader(client,username,password)
....
def addSecurityHeader(client,username,password):
security=Security()
userNameToken=UsernameToken(username,password)
timeStampToken=Timestamp(validity=600)
security.tokens.append(userNameToken)
security.tokens.append(timeStampToken)
client.set_options(wsse=security)
Please note that this method creates the security header depicted in Fig.1. So, your implementation may vary depending on the correct security header format provided by the owner of the service you are consuming.
Consume the relevant method (or operation) :
result=client.service.methodName(Inputs)
Logging:
One of the best practices in such implementations as this one is logging to see how the communication is executed. In case there is some issue, it makes debugging easy. The following code does basic logging. However, you can log many aspects of the communication in addition to the ones depicted in the code.
logging.basicConfig(level=logging.INFO)
logging.getLogger('suds.client').setLevel(logging.DEBUG)
logging.getLogger('suds.transport').setLevel(logging.DEBUG)
Result:
Here is the result in my case. Note that the server returned HTTP 200. This is the standard success code for HTTP request-response.
(200, (collectionNodeLmp){
timestamp = 2014-12-03 00:00:00-05:00
nodeLmp[] =
(nodeLmp){
pnodeId = 35010357
name = "YADKIN"
mccValue = -0.19
mlcValue = -0.13
price = 36.46
type = "500 KV"
timestamp = 2014-12-03 01:00:00-05:00
errorCodeId = 0
},
(nodeLmp){
pnodeId = 33138769
name = "ZION 1"
mccValue = -0.18
mlcValue = -1.86
price = 34.75
type = "Aggregate"
timestamp = 2014-12-03 01:00:00-05:00
errorCodeId = 0
},
})
How to write a UTF-8 file with Java?
var out = new java.io.PrintWriter(new java.io.File(path), "UTF-8");
text = new java.lang.String( src || "" );
out.print(text);
out.flush();
out.close();
How to access parent Iframe from JavaScript
I would recommend using the postMessage API.
In your iframe, call:
window.parent.postMessage({message: 'Hello world'}, 'http://localhost/');
In the page you're including the iframe you can listen for events like this:
window.addEventListener('message', function(event) {
if(event.origin === 'http://localhost/')
{
alert('Received message: ' + event.data.message);
}
else
{
alert('Origin not allowed!');
}
}, false);
By the way, it is also possible to do calls to other windows, and not only iframes.
Read more about the postMessage API on John Resigs blog here
Storing Data in MySQL as JSON
I would say the only two reasons to consider this are:
- performance just isn't good enough with a normalised approach
- you cannot readily model your particularly fluid/flexible/changing data
I wrote a bit about my own approach here:
What scalability problems have you encountered using a NoSQL data store?
(see the top answer)
Even JSON wasn't quite fast enough so we used a custom-text-format approach. Worked / continues to work well for us.
Is there a reason you're not using something like MongoDB? (could be MySQL is "required"; just curious)
disable editing default value of text input
You can either use the readonly or the disabled attribute. Note that when disabled, the input's value will not be submitted when submitting the form.
<input id="price_to" value="price to" readonly="readonly">
<input id="price_to" value="price to" disabled="disabled">
How do I extract data from JSON with PHP?
We can decode json string into array using json_decode function in php
1) json_decode($json_string) // it returns object
2) json_decode($json_string,true) // it returns array
$json_string = '{
"type": "donut",
"name": "Cake",
"toppings": [
{ "id": "5002", "type": "Glazed" },
{ "id": "5006", "type": "Chocolate with Sprinkles" },
{ "id": "5004", "type": "Maple" }
]
}';
$array = json_decode($json_string,true);
echo $array['type']; //it gives donut
Convert an int to ASCII character
I suppose that
std::to_string(i)
could do the job, it's an overloaded function, it could be any numeric type such as int, double or float
How can I change the remote/target repository URL on Windows?
Take a look in .git/config and make the changes you need.
Alternatively you could use
git remote rm [name of the url you sets on adding]
and
git remote add [name] [URL]
Or just
git remote set-url [URL]
Before you do anything wrong, double check with
git help remote
Printing chars and their ASCII-code in C
Simplest approach in printing ASCII values of a given alphabet.
Here is an example :
#include<stdio.h>
int main()
{
//we are printing the ASCII value of 'a'
char a ='a'
printf("%d",a)
return 0;
}
How to tell if UIViewController's view is visible
You want to use the UITabBarController's selectedViewController property. All view controllers attached to a tab bar controller have a tabBarController property set, so you can, from within any of the view controllers' code:
if([[[self tabBarController] selectedViewController] isEqual:self]){
//we're in the active controller
}else{
//we are not
}
Why does one use dependency injection?
Quite frankly, I believe people use these Dependency Injection libraries/frameworks because they just know how to do things in runtime, as opposed to load time. All this crazy machinery can be substituted by setting your CLASSPATH environment variable (or other language equivalent, like PYTHONPATH, LD_LIBRARY_PATH) to point to your alternative implementations (all with the same name) of a particular class. So in the accepted answer you'd just leave your code like
var logger = new Logger() //sane, simple code
And the appropriate logger will be instantiated because the JVM (or whatever other runtime or .so loader you have) would fetch it from the class configured via the environment variable mentioned above.
No need to make everything an interface, no need to have the insanity of spawning broken objects to have stuff injected into them, no need to have insane constructors with every piece of internal machinery exposed to the world. Just use the native functionality of whatever language you're using instead of coming up with dialects that won't work in any other project.
P.S.: This is also true for testing/mocking. You can very well just set your environment to load the appropriate mock class, in load time, and skip the mocking framework madness.
Where does Git store files?
I also couldn't find my git repository. I am using Windows 8 and created my repository (by mistake) under C:\Program Files (x86)\Git. I could see the repository folder in bash but not in cmd or Windows Explorer.
Then I remembered about Windows's "Virtual Store" feature. My repository folder was actually created under C:\Users\<username>\AppData\Local\VirtualStore\Program Files (x86)\Git\<myrepo> and in there was my .git folder!
Creating a ZIP archive in memory using System.IO.Compression
Function to return stream that contain zip file
public static Stream ZipGenerator(List<string> files)
{
ZipArchiveEntry fileInArchive;
Stream entryStream;
int i = 0;
List<byte[]> byteArray = new List<byte[]>();
foreach (var file in files)
{
byteArray.Add(File.ReadAllBytes(file));
}
var outStream = new MemoryStream();
using (var archive = new ZipArchive(outStream, ZipArchiveMode.Create, true))
{
foreach (var file in files)
{
fileInArchive=(archive.CreateEntry(Path.GetFileName(file), CompressionLevel.Optimal));
using (entryStream = fileInArchive.Open())
{
using (var fileToCompressStream = new MemoryStream(byteArray[i]))
{
fileToCompressStream.CopyTo(entryStream);
}
i++;
}
}
}
outStream.Position = 0;
return outStream;
}
If you want , write zip to file stream.
using (var fileStream = new FileStream(@"D:\Tools\DBExtractor\DBExtractor\bin\Debug\test.zip", FileMode.Create))
{
outStream.Position = 0;
outStream.WriteTo(fileStream);
}
`
JavaScript split String with white space
In case you're sure you have only one space between two words, you can use this one
str.replace(/\s+/g, ' ').split(' ')
so you replace one space by two, the split by space
No provider for Http StaticInjectorError
Update: Angular v6+
For Apps converted from older versions (Angular v2 - v5): HttpModule is now deprecated and you need to replace it with HttpClientModule or else you will get the error too.
- In your app.module.ts replace
import { HttpModule } from '@angular/http'; with the new HttpClientModule import { HttpClientModule} from "@angular/common/http"; Note: Be sure to then update the modules imports[] array by removing the old HttpModule and replacing it with the new HttpClientModule.
- In any of your services that used HttpModule replace
import { Http } from '@angular/http'; with the new HttpClient import { HttpClient } from '@angular/common/http';
Update how you handle your Http response. For example - If you have code that looks like this
http.get('people.json').subscribe((res:Response) => this.people = res.json());
The above code example will result in an error. We no longer need to parse the response, because it already comes back as JSON in the config object.
The subscription callback copies the data fields into the component's config object, which is data-bound in the component template for display.
For more information please see the -
Angular HttpClientModule - Official Documentation
Difference between EXISTS and IN in SQL?
Difference lies here:
select *
from abcTable
where exists (select null)
Above query will return all the records while below one would return empty.
select *
from abcTable
where abcTable_ID in (select null)
Give it a try and observe the output.
How do I get bootstrap-datepicker to work with Bootstrap 3?
I also use Stefan Petre’s http://www.eyecon.ro/bootstrap-datepicker and it does not work with Bootstrap 3 without modification. Note that http://eternicode.github.io/bootstrap-datepicker/ is a fork of Stefan Petre's code.
You have to change your markup (the sample markup will not work) to use the new CSS and form grid layout in Bootstrap 3. Also, you have to modify some CSS and JavaScript in the actual bootstrap-datepicker implementation.
Here is my solution:
<div class="form-group row">
<div class="col-xs-8">
<label class="control-label">My Label</label>
<div class="input-group date" id="dp3" data-date="12-02-2012" data-date-format="mm-dd-yyyy">
<input class="form-control" type="text" readonly="" value="12-02-2012">
<span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span>
</div>
</div>
</div>
CSS changes in datepicker.css on lines 176-177:
.input-group.date .input-group-addon i,
.input-group.date .input-group-addon i {
Javascript change in datepicker-bootstrap.js on line 34:
this.component = this.element.is('.date') ? this.element.find('.input-group-addon') : false;
UPDATE
Using the newer code from http://eternicode.github.io/bootstrap-datepicker/ the changes are as follows:
CSS changes in datepicker.css on lines 446-447:
.input-group.date .input-group-addon i,
.input-group.date .input-group-addon i {
Javascript change in datepicker-bootstrap.js on line 46:
this.component = this.element.is('.date') ? this.element.find('.input-group-addon, .btn') : false;
Finally, the JavaScript to enable the datepicker (with some options):
$(".input-group.date").datepicker({ autoclose: true, todayHighlight: true });
Tested with Bootstrap 3.0 and JQuery 1.9.1. Note that this fork is better to use than the other as it is more feature rich, has localization support and auto-positions the datepicker based on the control position and window size, avoiding the picker going off the screen which was a problem with the older version.
Facebook Oauth Logout
A note for Christoph's answer:
Facebook Oauth Logout
The logout function requires a callback function to be specified and will fail without
it, at least on Firefox. Chrome works without the callback.
FB.logout(function(response) {});
Sort a list of tuples by 2nd item (integer value)
>>> from operator import itemgetter
>>> data = [('abc', 121),('abc', 231),('abc', 148), ('abc',221)]
>>> sorted(data,key=itemgetter(1))
[('abc', 121), ('abc', 148), ('abc', 221), ('abc', 231)]
IMO using itemgetter is more readable in this case than the solution by @cheeken. It is
also faster since almost all of the computation will be done on the c side (no pun intended) rather than through the use of lambda.
>python -m timeit -s "from operator import itemgetter; data = [('abc', 121),('abc', 231),('abc', 148), ('abc',221)]" "sorted(data,key=itemgetter(1))"
1000000 loops, best of 3: 1.22 usec per loop
>python -m timeit -s "data = [('abc', 121),('abc', 231),('abc', 148), ('abc',221)]" "sorted(data,key=lambda x: x[1])"
1000000 loops, best of 3: 1.4 usec per loop
How to retrieve checkboxes values in jQuery
Here's an alternative in case you need to save the value to a variable:
var _t = $('#c_b :checkbox:checked').map(function() {
return $(this).val();
});
$('#t').append(_t.join(','));
(map() returns an array, which I find handier than the text in textarea).
how to customise input field width in bootstrap 3
<form role="form">
<div class="form-group">
<div class="col-xs-2">
<label for="ex1">col-xs-2</label>
<input class="form-control" id="ex1" type="text">
</div>
<div class="col-xs-3">
<label for="ex2">col-xs-3</label>
<input class="form-control" id="ex2" type="text">
</div>
<div class="col-xs-4">
<label for="ex3">col-xs-4</label>
<input class="form-control" id="ex3" type="text">
</div>
</div>
</form>
Import CSV into SQL Server (including automatic table creation)
You can create a temp table variable and insert the data into it, then insert the data into your actual table by selecting it from the temp table.
declare @TableVar table
(
firstCol varchar(50) NOT NULL,
secondCol varchar(50) NOT NULL
)
BULK INSERT @TableVar FROM 'PathToCSVFile' WITH (FIELDTERMINATOR = ',', ROWTERMINATOR = '\n')
GO
INSERT INTO dbo.ExistingTable
(
firstCol,
secondCol
)
SELECT firstCol,
secondCol
FROM @TableVar
GO
Wait until all promises complete even if some rejected
There is a finished proposal for a function which can accomplish this natively, in vanilla Javascript: Promise.allSettled, which has made it to stage 4, is officialized in ES2020, and is implemented in all modern environments. It is very similar to the reflect function in this other answer. Here's an example, from the proposal page. Before, you would have had to do:
function reflect(promise) {
return promise.then(
(v) => {
return { status: 'fulfilled', value: v };
},
(error) => {
return { status: 'rejected', reason: error };
}
);
}
const promises = [ fetch('index.html'), fetch('https://does-not-exist/') ];
const results = await Promise.all(promises.map(reflect));
const successfulPromises = results.filter(p => p.status === 'fulfilled');
Using Promise.allSettled instead, the above will be equivalent to:
const promises = [ fetch('index.html'), fetch('https://does-not-exist/') ];
const results = await Promise.allSettled(promises);
const successfulPromises = results.filter(p => p.status === 'fulfilled');
Those using modern environments will be able to use this method without any libraries. In those, the following snippet should run without problems:
_x000D_
_x000D_
Promise.allSettled([_x000D_
Promise.resolve('a'),_x000D_
Promise.reject('b')_x000D_
])_x000D_
.then(console.log);
_x000D_
_x000D_
_x000D_
Output:
[
{
"status": "fulfilled",
"value": "a"
},
{
"status": "rejected",
"reason": "b"
}
]
For older browsers, there is a spec-compliant polyfill here.
How to draw circle in html page?
If you're using sass to write your CSS you can do:
@mixin draw_circle($radius){
width: $radius*2;
height: $radius*2;
-webkit-border-radius: $radius;
-moz-border-radius: $radius;
border-radius: $radius;
}
.my-circle {
@include draw_circle(25px);
background-color: red;
}
Which outputs:
.my-circle {
width: 50px;
height: 50px;
-webkit-border-radius: 25px;
-moz-border-radius: 25px;
border-radius: 25px;
background-color: red;
}
Try it here: https://www.sassmeister.com/
Why does my 'git branch' have no master?
if it is a new repo you've cloned, it may still be empty, in which case:
git push -u origin master
should likely sort it out.
(did in my case. not sure this is the same issue, thought i should post this just incase. might help others.)
Using LINQ to remove elements from a List<T>
You can remove in two ways
var output = from x in authorsList
where x.firstname != "Bob"
select x;
or
var authors = from x in authorsList
where x.firstname == "Bob"
select x;
var output = from x in authorsList
where !authors.Contains(x)
select x;
I had same issue, if you want simple output based on your where condition , then first solution is better.
Dynamically Add Variable Name Value Pairs to JSON Object
From what the other answers have proposed, I believe this might help:
var object = ips[ipId];
var name = "Joe";
var anothername = "Fred";
var value = "Thingy";
var anothervalue = "Fingy";
object[name] = value;
object[anothername] = anothervalue;
However, this is not tested, just an assumption based on the constant repetition of:
object["string"] = value;
//object = {string: value}
How to check for registry value using VbScript
Set objShell = WScript.CreateObject("WScript.Shell")
skey = "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{9A25302D-30C0-39D9-BD6F-21E6EC160475}\"
with CreateObject("WScript.Shell")
on error resume next ' turn off error trapping
sValue = .regread(sKey) ' read attempt
bFound = (err.number = 0) ' test for success
end with
if bFound then
msgbox "exists"
else
msgbox "not exists"
End If
Sorting Directory.GetFiles()
Here's the VB.Net solution that I've used.
First make a class to compare dates:
Private Class DateComparer
Implements System.Collections.IComparer
Public Function Compare(ByVal info1 As Object, ByVal info2 As Object) As Integer Implements System.Collections.IComparer.Compare
Dim FileInfo1 As System.IO.FileInfo = DirectCast(info1, System.IO.FileInfo)
Dim FileInfo2 As System.IO.FileInfo = DirectCast(info2, System.IO.FileInfo)
Dim Date1 As DateTime = FileInfo1.CreationTime
Dim Date2 As DateTime = FileInfo2.CreationTime
If Date1 > Date2 Then Return 1
If Date1 < Date2 Then Return -1
Return 0
End Function
End Class
Then use the comparer while sorting the array:
Dim DirectoryInfo As New System.IO.DirectoryInfo("C:\")
Dim Files() As System.IO.FileInfo = DirectoryInfo.GetFiles()
Dim comparer As IComparer = New DateComparer()
Array.Sort(Files, comparer)
COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'latin1'
Firstly run this query
SHOW VARIABLES LIKE '%char%';
You have character_set_server='latin1'
If so,go into your config file,my.cnf and add or uncomment these lines:
character-set-server = utf8
collation-server = utf8_unicode_ci
Restart the server.
Yes late to the party,just encountered the same issue.
Uses for the '"' entity in HTML
In my experience it may be the result of auto-generation by a string-based tools, where the author did not understand the rules of HTML.
When some developers generate HTML without the use of special XML-oriented tools, they may try to be sure the resulting HTML is valid by taking the approach that everything must be escaped.
Referring to your example, the reason why every occurrence of " is represented by " could be because using that approach, you can safely use such "special" characters in both attributes and values.
Another motivation I've seen is where people believe, "We must explicitly show that our symbols are not part of the syntax." Whereas, valid HTML can be created by using the proper string-manipulation tools, see the previous paragraph again.
Here is some pseudo-code loosely based on C#, although it is preferred to use valid methods and tools:
public class HtmlAndXmlWriter
{
private string Escape(string badString)
{
return badString.Replace("&", "&").Replace("\"", """).Replace("'", "'").Replace(">", ">").Replace("<", "<");
}
public string GetHtmlFromOutObject(Object obj)
{
return "<div class='type_" + Escape(obj.Type) + "'>" + Escape(obj.Value) + "</div>";
}
}
It's really very common to see such approaches taken to generate HTML.
Groovy write to file (newline)
As @Steven points out, a better way would be:
public void writeToFile(def directory, def fileName, def extension, def infoList) {
new File("$directory/$fileName$extension").withWriter { out ->
infoList.each {
out.println it
}
}
}
As this handles the line separator for you, and handles closing the writer as well
(and doesn't open and close the file each time you write a line, which could be slow in your original version)
How to check whether an array is empty using PHP?
Making the most appropriate decision requires knowing the quality of your data and what processes are to follow.
- If you are going to disqualify/disregard/remove this row, then the earliest point of filtration should be in the mysql query.
WHERE players IS NOT NULL WHERE players != '' WHERE COALESCE(players, '') != '' WHERE players IS NOT NULL AND players != ''- ...it kind of depends on your store data and there will be other ways, I'll stop here.
If you aren't 100% sure if the column will exist in the result set, then you should check that the column is declared. This will mean calling array_key_exists(), isset(), or empty() on the column. I am not going to bother delineating the differences here (there are other SO pages for that breakdown, here's a start: 1, 2, 3). That said, if you aren't in total control of the result set, then maybe you have over-indulged application "flexibility" and should rethink if the trouble of potentially accessing non-existent column data is worth it. Effectively, I am saying that you should never need to check if a column is declared -- ergo you should never need empty() for this task. If anyone is arguing that empty() is more appropriate, then they are pushing their own personal opinion about expressiveness of scripting. If you find the condition in #5 below to be ambiguous, add an inline comment to your code -- but I wouldn't. The bottom line is that there is no programmatical advantage to making the function call.
Might your string value contain a 0 that you want to deem true/valid/non-empty? If so, then you only need to check if the column value has length.
Here is a Demo using strlen(). This will indicated whether or not the string will create meaningful array elements if exploded.
I think it is important to mention that by unconditionally exploding, you are GUARANTEED to generate a non-empty array. Here's proof: Demo In other words, checking if the array is empty is completely useless -- it will be non-empty every time.
If your string will NOT POSSIBLY contain a zero value (because, say, this is a csv consisting of ids which start from 1 and only increment), then if ($gamerow['players']) { is all you need -- end of story.
...but wait, what are you doing after determining the emptiness of this value? If you have something down-script that is expecting $playerlist, but you are conditionally declaring that variable, then you risk using the previous row's value or again generating Notices. So do you need to unconditionally declare $playerlist as something? If there are no truthy values in the string, does your application benefit from declaring an empty array? Chances are, the answer is yes. In this case, you can ensure that the variable is array-type by falling back to an empty array -- this way it won't matter if you feed that variable into a loop. The following conditional declarations are all equivalent.
if ($gamerow['players']) { $playerlist = explode(',', $gamerow['players']); } else { $playerlist = []; }$playerlist = $gamerow['players'] ? explode(',', $gamerow['players']) : [];
Why have I gone to such length to explain this very basic task?
- I have whistleblown nearly every answer on this page and this answer is likely to draw revenge votes (this happens often to whistleblowers who defend this site -- if an answer has downvotes and no comments, always be skeptical).
- I think it is important that Stackoverflow is a trusted resource that doesn't poison researchers with misinformation and suboptimal techniques.
- This is how I show how much I care about upcoming developers so that they learn the how and the why instead of just spoon-feeding a generation of copy-paste programmers.
- I frequently use old pages to close new duplicate pages -- this is the responsibility of veteran volunteers who know how to quickly find duplicates. I cannot bring myself to use an old page with bad/false/suboptimal/misleading information as a reference because then I am actively doing a disservice to a new researcher.
how to display a javascript var in html body
<html>
<head>
<script type="text/javascript">
var number = 123;
var string = "abcd";
function docWrite(variable) {
document.write(variable);
}
</script>
</head>
<body>
<h1>the value for number is: <script>docWrite(number)</script></h1>
<h2>the text is: <script>docWrite(string)</script> </h2>
</body>
</html>
You can shorten document.write but
can't avoid <script> tag
vuetify center items into v-flex
v-flex does not have a display flex!
Inspect v-flex in your browser and you will find out it is just a simple block div.
So, you should override it with display: flex in your HTML or CSS to make it work with justify-content.
Match everything except for specified strings
If you want to make sure that the string is neither red, green nor blue, caskey's answer is it. What is often wanted, however, is to make sure that the line does not contain red, green or blue anywhere in it. For that, anchor the regular expression with ^ and include .* in the negative lookahead:
^(?!.*(red|green|blue))
Also, suppose that you want lines containing the word "engine" but without any of those colors:
^(?!.*(red|green|blue)).*engine
You might think you can factor the .* to the head of the regular expression:
^.*(?!red|green|blue)engine # Does not work
but you cannot. You have to have both instances of .* for it to work.
Adding Image to xCode by dragging it from File
For xCode 10, first you need to add the image in your assetsCatalogue and then type this:
let imageView = UIImageView(image: #imageLiteral(resourceName: "type the name of your image here..."))
For beginners, let imageView is the name of the UIImageView object we are about to create.
An example for embedding an image into a viewControler file would look like this:
import UIKit
class TutorialViewCotroller: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let imageView = UIImageView(image: #imageLiteral(resourceName: "intoImage"))
view.addSubview(imageView)
}
}
Please notice that I did not use any extension for the image file name, as in my case it is a group of images.
How do I download a binary file over HTTP?
Following solutions will first read the whole content to memory before writing it to disc (for more i/o efficient solutions look at the other answers).
You can use open-uri, which is a one liner
require 'open-uri'
content = open('http://example.com').read
Or by using net/http
require 'net/http'
File.write("file_name", Net::HTTP.get(URI.parse("http://url.com")))
How to print multiple lines of text with Python
I wanted to answer to the following question which is a little bit different than this:
Best way to print messages on multiple lines
He wanted to show lines from repeated characters too. He wanted this output:
----------------------------------------
# Operator Micro-benchmarks
# Run_mode: short
# Num_repeats: 5
# Num_runs: 1000
----------------------------------------
You can create those lines inside f-strings with a multiplication, like this:
run_mode, num_repeats, num_runs = 'short', 5, 1000
s = f"""
{'-'*40}
# Operator Micro-benchmarks
# Run_mode: {run_mode}
# Num_repeats: {num_repeats}
# Num_runs: {num_runs}
{'-'*40}
"""
print(s)
Can you control how an SVG's stroke-width is drawn?
I found an easy way, which has a few restrictions, but worked for me:
- define the shape in defs
- define a clip path referencing the shape
- use it and double the stroke with as the outside is clipped
Here a working example:
_x000D_
_x000D_
<svg width="240" height="240" viewBox="0 0 1024 1024">_x000D_
<defs>_x000D_
<path id="ld" d="M256,0 L0,512 L384,512 L128,1024 L1024,384 L640,384 L896,0 L256,0 Z"/>_x000D_
<clipPath id="clip">_x000D_
<use xlink:href="#ld"/>_x000D_
</clipPath>_x000D_
</defs>_x000D_
<g>_x000D_
<use xlink:href="#ld" stroke="#0081C6" stroke-width="160" fill="#00D2B8" clip-path="url(#clip)"/>_x000D_
</g>_x000D_
</svg>
_x000D_
_x000D_
_x000D_
Where is my m2 folder on Mac OS X Mavericks
If you have used brew to install maven, create .m2 directory and then copy settings.xml in .m2 directory.
mkdir ~/.m2
cp /usr/local/Cellar/maven32/3.2.5/libexec/conf/settings.xml ~/.m2
You may need to change the maven version in the path, mine is 3.2.5
How to use refs in React with Typescript
Lacking a complete example, here is my little test script for getting user input when working with React and TypeScript. Based partially on the other comments and this link https://medium.com/@basarat/strongly-typed-refs-for-react-typescript-9a07419f807#.cdrghertm
/// <reference path="typings/react/react-global.d.ts" />
// Init our code using jquery on document ready
$(function () {
ReactDOM.render(<ServerTime />, document.getElementById("reactTest"));
});
interface IServerTimeProps {
}
interface IServerTimeState {
time: string;
}
interface IServerTimeInputs {
userFormat?: HTMLInputElement;
}
class ServerTime extends React.Component<IServerTimeProps, IServerTimeState> {
inputs: IServerTimeInputs = {};
constructor() {
super();
this.state = { time: "unknown" }
}
render() {
return (
<div>
<div>Server time: { this.state.time }</div>
<input type="text" ref={ a => this.inputs.userFormat = a } defaultValue="s" ></input>
<button onClick={ this._buttonClick.bind(this) }>GetTime</button>
</div>
);
}
// Update state with value from server
_buttonClick(): void {
alert(`Format:${this.inputs.userFormat.value}`);
// This part requires a listening web server to work, but alert shows the user input
jQuery.ajax({
method: "POST",
data: { format: this.inputs.userFormat.value },
url: "/Home/ServerTime",
success: (result) => {
this.setState({ time : result });
}
});
}
}
