I working on Flutter project. I have query regarding string manipulation. I storing some value like following
String a="31,31,31,31,31,31,31,41,41,41,41,41,41,41,41,41,41,53,53,53,53,53,53,53,53"
I have output like Distinct in query
a="31,41,53"
may I know how to achieve this function.
Thanks in advance
Sathish
void main() {
String a =
"31,31,31,31,31,31,31,41,41,41,41,41,41,41,41,41,41,53,53,53,53,53,53,53,53";
var values = a.split(',');
var result = Set.from(values).join(',');
print(result);
}
Result:
31,41,53
Related
I need to take 'href'(tag link location value) value from following pattern html text. need some expert help to do it using typescript
String Text one
"<html><body>docker_command.txt </body></html>"
String Text Two
"<html><body>https://www.facebook.com/ </body></html>"
Something like this?
const a = '"<html><body>docker_command.txt </body></html>"';
const b = '"<html><body>https://www.facebook.com/ </body></html>"';
function getHref(html: string): string|null {
if (!html) {
return null;
}
return html.match(/ href=("|')([^'"]*?)('|")/i)[2];
}
console.log(getHref(a));
console.log(getHref(b));
I'm trying to take an input from the user using an Input Text field, this data is a number. I want the user to input the correct number (in this case 1) and then print out yay.
However, i can't get it to work. Any help is much appreciated.
I assume the issue is to do with comparing an int and a string, but honestly im not sure anymore.
import flash.events.MouseEvent;
import flash.text.TextField;
var dayVar:String = dayInput.text;
var dayNum:Number = Number(dayVar);
stop();
button3.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler3);
function mouseDownHandler3(event:MouseEvent):void
{
if(dayNum == 1) {
trace("yay");
} else {
trace("nay");
}
}
You will have to update your dayVal and/or dayNum after user has given input. So in this minimal case you can simply:
function mouseDownHandler3(event:MouseEvent):void{
if(Number(dayInput.text)==1) {
trace("yay");
} else {
trace("nay");
}
}
Other possibilites would be listening Event.CHANGE for the text input, or KeyboardEvent to update your variables, but in this case the MouseEvent handler does the job easier.
You can use restriction property for text field input like this:
dayInput.restrict = "0-9";
This should omit to type only digits.
I am trying to write NHibernate queryover to select all records which has been deleted between two dates. I am using IsBetween().And(). But how do i write if i dont want to include both the fromdate and todate?
Here is my query:
public IEnumerable<DeletedRecord> Search(
DateTime deletedFrom,
DateTime deletedTo
)
{
DeletedRecord delAlias = null;
var query = Session.QueryOver(() => delAlias);
query.Where(() => delAlias.DeletedDate.IsBetween(deletedFrom).And(deletedTo));
return query.Future<DeletedRecord>();
}
Can anyone help me how to achieve so that i can bring all records after the deletedFrom date and before the deletedTo date?
Thanks
Just construct your date in 2 steps:
var query = Session.QueryOver(() => delAlias);
if(youNeedFromDate) //first step
query = query.Where(() => delAlias.DeletedDate >= deletedFrom);
if(youNeedToDate) //second step
query = query.Where(() => delAlias.DeletedDate <= deletedTo);
youNeedFromDate and youNeedToDate are bool variables that you can pass to your function or it could be different condition upon your logic.
Such cases happen quite often . defining extension method helps a lot. see below
public static IQueryOver<T, T> WhereIf<T>(this IQueryOver<T, T> query,bool condition, Expression<Func<T, bool>> expression) where T : class
{
if (condition)
{
query = query.And(expression);
}
return query;
}
Using the above you can chain you conditions and only it will only include the where condition if the first arg evaluates to true.
var query= Session.QueryOver<DeletedRecord>()
.WhereIf(filterByFrom,d=>d.DeletedDate>=fromDate)
.WhereIf(filterByTo,d=>d.DeletedDate<=toDate);
It's difficult to explain the case by words, let me give an example:
var myObj = {
'name': 'Umut',
'age' : 34
};
var prop = 'name';
var value = 'Onur';
myObj[name] = value; // This does not work
eval('myObj.' + name) = value; //Bad coding ;)
How can I set a variable property with variable value in a JavaScript object?
myObj[prop] = value;
That should work. You mixed up the name of the variable and its value. But indexing an object with strings to get at its properties works fine in JavaScript.
myObj.name=value
or
myObj['name']=value (Quotes are required)
Both of these are interchangeable.
Edit: I'm guessing you meant myObj[prop] = value, instead of myObj[name] = value. Second syntax works fine: http://jsfiddle.net/waitinforatrain/dNjvb/1/
You can get the property the same way as you set it.
foo = {
bar: "value"
}
You set the value
foo["bar"] = "baz";
To get the value
foo["bar"]
will return "baz".
You could also create something that would be similar to a value object (vo);
SomeModelClassNameVO.js;
function SomeModelClassNameVO(name,id) {
this.name = name;
this.id = id;
}
Than you can just do;
var someModelClassNameVO = new someModelClassNameVO('name',1);
console.log(someModelClassNameVO.name);
simple as this
myObj.name = value;
When you create an object myObj as you have, think of it more like a dictionary. In this case, it has two keys, name, and age.
You can access these dictionaries in two ways:
Like an array (e.g. myObj[name]); or
Like a property (e.g. myObj.name); do note that some properties are reserved, so the first method is preferred.
You should be able to access it as a property without any problems. However, to access it as an array, you'll need to treat the key like a string.
myObj["name"]
Otherwise, javascript will assume that name is a variable, and since you haven't created a variable called name, it won't be able to access the key you're expecting.
You could do the following:
var currentObj = {
name: 'Umut',
age : 34
};
var newValues = {
name: 'Onur',
}
Option 1:
currentObj = Object.assign(currentObj, newValues);
Option 2:
currentObj = {...currentObj, ...newValues};
Option 3:
Object.keys(newValues).forEach(key => {
currentObj[key] = newValues[key];
});
I'm writing a mini-console of sorts and I'm trying to figure out how to extract things from a link. For example, in PHP this is a request variable
so:
http://somelink.com/somephp.php?variable1=10&variable2=20
Then PHP figures out the url parameters and assigns them to a variable.
How would I parse something like this in Swift?
So, given the string I'd want to take: variable1=10 and variable2=20 etc, is there a simple way to do this? I tried googling around but didn't really know what I was searching for.
I have a really horrible hacky way of doing this but it's not really extendable.
You’d be wanting NSURLComponents:
import Foundation
let urlStr = "http://somelink.com/somephp.php?variable1=10&variable2=20"
let components = NSURLComponents(string: urlStr)
components?.queryItems?.first?.name // Optional("variable1")
components?.queryItems?.first?.value // Optional("10")
You might find it helpful to add a subscript operator for the query items:
extension NSURLComponents {
subscript(queryItemName: String) -> String? {
// of course, if you do this a lot,
// cache it in a dictionary instead
for item in self.queryItems ?? [] {
if item.name == queryItemName {
return item.value
}
}
return nil
}
}
if let components = NSURLComponents(string: urlStr) {
components["variable1"] ?? "No value"
}