I have an array and want to fetch some values from array which has Strings as key.Please suggest how can i retrieve those values from array have string as key.
Code for Controller is:
var ultColumn=undefined;
$scope.ultColm="Attained Age";
for(var i=0;i<5;i++){
ultColumn=ultrowCellData[i][$scope.ultColmn];//This is not working
}//ultrowCellData contains the array
Please suggest how to get the value of key "Attained Age"
You can use angular.forEach(); For example:
angular.forEach(yourArray, function(value, key){
if(typeof key === 'string'){
console.log("Your result is here :", value);
}
});
Thanks.
If screenshot which you provided shows data included in ultrowCellData then it is not an array but map - var something = ultrowCellData['Attained Age '] will assign value 28 to something
You seem to have forgotten a space at the end of your key, on line 2.
Try Attained Age<space> instead of Attained Age (replace <space> with an actual space).
Notice, though, that this is a non-standard use for an Array, as arrays usually use only numbers as keys.
if at all possible, try using an Object instead.
Related
I’m a beginner in Laravel but have a problem at first. I wrote this query and I’m waiting for Sonya Bins as result but unexpectedly I see ["Sonya Bins"]. what’s the problem?
Route::get('products', function () {
$articles=DB::table('users')->where('id','2')->get()->pluck('name');
return view('products',compact('articles'));
});
pluck will return array if you want to get only single value then use value
// will return array
$articles=DB::table('users')->where('id','2')->get()->pluck('name');
//will return string
$articles=DB::table('users')->where('id','2')->value('name');
// output Sonya Bins
here is an example from the documentation:
if you don't even need an entire row, you may extract a single value from a record using the value method. This method will return the value of the column directly:
$email = DB::table('users')->where('name', 'John')->value('email');
Read more about it here
Hope it helps.
Thanks
pluck() used to return a String before Laravel 5.1, but now it returns an array.
The alternative for that behavior now is value()
Try this:
Route::get('products', function () {
$articles=DB::table('users')->where('id','2')->get()->value('name');
return view('products',compact('articles'));
});
I think it's easier to use the Model + find function + value function.
Route::get('products', function () {
$articles = User::find(2)->value('name');
return view('products',compact('articles'));
});
pluck will return the collection.
I think id is your primary key.
You can just get the first record, and call its attribute's name:
DB::table('users')->where('id','2')->first()->name;
or
DB::table('users')->find(2)->name;
First thing is that you used invalid name for what you pass to view - you don't pass articles but user name.
Second thing is that you use get method to get results instead of first (or find) - you probably expect there is only single user with id = 2.
So to sum up you should use:
$userName = DB::table('users')->find(2)->name;
return view('products',compact('userName'));
Of course above code is for case when you are 100% sure there is user with id = 2 in database. If it might happen there won't be such user, you should use construction like this:
$userName = optional(DB::table('users')->find(2))->name;
($userName will be null if there is no such record)
or
$userName = optional(DB::table('users')->find(2))->name ?? 'No user';
in case you want to use custom string.
I have a array variable viewedprofiles= []; initialized.
I'll be assigning the profiles that have been viewed to this viewedprofiles array. Now if I try to display it (By assigning it to a $scope), I get NULL for other values that have not got assigned or touched.
var viewedprofiles= [];
angular.forEach(profiles, function(value, key){
if(value.viewed== "yes") {
viewedprofiles[value.id] = TRUE;
}
});
The output of viewedprofiles is as follows
[NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,TRUE]
Output explanation :
Since the 9th id's profile viewed value was yes, the output returned TRUE at the 9th element of the viewedprofiles array.
Nothing wrong actually.
But I was wondering as far as the above code, the id was TRUE for 9th element. What if the id was some large number say 15640, Will there be 15639 NULLs before TRUE? Am I doing anything wrong or is there another way to work this out?
I found the answer.
What I was trying to do was basically wrong at the assigning part. I should push the element instead of assigning.
The following worked.
angular.forEach(profiles, function(value, key){
if(value.viewed== "yes") {
viewedprofiles.push(value.id);
}
}, viewedprofiles);
I have an array of subscription instances #subscription_valids and an array of subscribed player that look like that :
array_subscribed_players = [{"name0" => "link1"}, {"name1"=>"link2"}, {"name2"=>"link3"}....]
What I need to do is : for each subscription in #subscription_valids :
#subscription_valids.each do |subscription|
I need to check if subscription.user.full_name or if subscription.user.full_name_inversed matches a key in one of the hashes of array_subscribed_player (in the exemple "name0", "name1" or "name2").
If it matches then I should store the relevant subscription as key in a hash in a new array and extract the relevant link as value of this hash. My final outpout should be an array that looks like this :
[{subscription1 => "link1"}, {subscription2 => "link2}, ...]
else if the subscription.user.full_name doesnt match i'll just store the subscription in a failure array.
How can I achieve this result ?
See http://ruby-doc.org/core-2.2.3/Hash.html
A user-defined class may be used as a hash key if the hash and eql?
methods are overridden to provide meaningful behavior. By default,
separate instances refer to separate hash keys.
so I think you should override your .eql? method in #subscription_valids to something meaningful (like a unique string)
I can't think for a Array method so you can go like:
demo
results = []
failures = []
#subscription_valids.each do |subscription|
array_subscribed_players.each do |player|
if player.keys.first == subscription.user.full_name || player.keys.first == subscription.user.full_name_inversed
results << { subscription => player[player.keys.first] }
else
failures << subscription
end
end
end
You can try the following:
valid = array_subscribed_players.select{|x| #subscription_valids.map(&:name).include?(x.keys.first)}
Demo
If you need to store both valid and invalid values somewhere:
valid, invalid = array_subscribed_players.partition{|x| #subscription_valids.map(&:name).include?(x.keys.first)}
In my Angular controller, i loop through an array of cities to retrieve each value sent :
angular.forEach($scope.outPutcities, function (value, key) {
// value.id are 3,4
$scope.countries.cityId = value.id;
$scope.cities.push($scope.countries.cityId)
});
But the cityId value has always the last value in the array which is 4.
[Object { countryName=Canada, cityId=**4**}, Object {countryName=Canada, cityId=**4**]
But what i want is :
[Object { countryName=Canada, cityId=**3**}, Object {countryName=Canada, cityId=**4**]
Is there an easy to fix this ? Thanks
Firstly this is redundant
$scope.countries.cityId = value.id;
You are assigning to countries.cityId and overwriting it on each iteration, rather just do
$scope.cities.push(value.id)
Your code does look fine besides that, are you sure the $scope.outPutcities has the values you are expecting?
I have an array, lets call it _persons.
I am populating this array with Value Objects, lets call this object PersonVO
Each PersonVO has a name and a score property.
What I am trying to do is search the array &
//PSEUDO CODE
1 Find any VO's with same name (there should only be at most 2)
2 Do a comparison of the score propertys
3 Keep ONLY the VO with the higher score, and delete remove the other from the _persons array.
I'm having trouble with the code implementation. Any AS3 wizards able to help?
You'd better use a Dictionary for this task, since you have a designated unique property to query. A dictionary approach is viable in case you only have one key property, in your case name, and you need to have only one object to have this property at any given time. An example:
var highscores:Dictionary;
// load it somehow
function addHighscore(name:String,score:Number):Boolean {
// returns true if this score is bigger than what was stored, aka personal best
var prevScore:Number=highscores[name];
if (isNaN(prevScore) || (prevScore<score)) {
// either no score, or less score - write a new value
highscores[name]=score;
return true;
}
// else don't write, the new score is less than what's stored
return false;
}
The dictionary in this example uses passed strings as name property, that is the "primary key" here, thus all records should have unique name part, passed into the function. The score is the value part of stored record. You can store more than one property in the dictionary as value, you'll need to wrap then into an Object in this case.
you want to loop though the array and check if there are any two people with the same name.
I have another solution that may help, if not please do say.
childrenOnStage = this.numChildren;
var aPerson:array = new array;
for (var c:int = 0; c < childrenOnStage; c++)
{
if (getChildAt(c).name == "person1")
{
aPerson:array =(getChildAt(c);
}
}
Then trace the array,