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How do tie the procedure to the elements on the list?

briley

ListBox.

procedure TFUsers.FormCreate(Sender: TObject);
var
  i: integer;
begin
  QueryUsers.Connection := FConnection.MainConnection;
  QueryUsers.SQL.Clear;
  QueryUsers.SQL.Add('select login from users');
  QueryUsers.Active := True;
  QueryUsers.Open;
  for i := 0 to QueryUsers.RecordCount-1 do
  begin
    ListBox_ListUsers.AddItem(QueryUsers.FieldByName('login').AsString, ****);
    QueryUsers.Next;
  end;
end;

Where are the stars? How am I supposed to write a procedure?

kalena

ListBox_ListUsers.AddItem(QueryUsers.FieldByName('login').AsString, @MyProc);

Right?

delphi 3974

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D

how to remove the element from the list
Software Programming • javascript • • derk

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removeItem It's just inside. Init♪ At this point this.listItem There's no element.That's why the processors don't go anywhere.Simple solution instead removeItemthat runs all the elements, you can. removeItemwhich adds to a particular element by the processor:removeItem: function(elem) { elem.onclick = function() { console.log(elem); } }, For disposal, use method https://developer.mozilla.org/ru/docs/Web/API/ChildNode/remove (function() { "use strict" let List = { items: [], init: function() { this.casheDom(); this.bindEvent(); }, casheDom: function() { this.input = document.querySelector(".js-input"); this.button = document.querySelector(".js-btn-add"); this.view = document.querySelector(".js-list-view"); this.listItem = document.querySelectorAll(".item"); }, bindEvent: function() { this.button.addEventListener("click", this.addItem.bind(this)); }, render: function() { this.clearList(); let arr = this.items; for (let i = 0; arr.length > i; i++) { let elem = document.createElement("div"), itemTxt = document.createTextNode(arr[i]); elem.setAttribute("class", "item"); elem.appendChild(itemTxt); this.view.appendChild(elem); this.removeItem(elem); } this.listItem = document.querySelectorAll(".item"); }, addItem: function() { this.items.push(this.input.value); this.render(); this.input.value = ''; }, removeItem: function(elem) { elem.onclick = function() { console.log(elem); elem.remove(); } }, clearList: function() { let myNode = this.view; while (myNode.firstChild) { myNode.removeChild(myNode.firstChild); } } }; window.addEventListener("load", function() { List.init(); }); })();<div class="list"> <input type="text" class="js-input"> <button class="js-btn-add">add</button> <div class="js-list-view"></div> </div>
G

How to number the elements of the list
Software Programming • python • • guilherme

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Example:list = ['apple','1','5'] for x,y in enumerate(list, start=1): print(f'{x}:{y}')
NullPointException when inserting element in list
Software Programming • java nullpointerexc languageep • • Marcee

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K

One of the issues in the code is when trying to add a product in an unbooted list produtos of class Orcamento, to initialize your list you can do so:private List<Produto>produtos = new ArrayList<>(); Still for this case, you could optimize your class as you will hardly add an entire list of Products instead of the old one, so you could change your method setProduto() For addProduto(). See in the example below:class Orcamento { private List<Produto>produtos = new ArrayList<>(); private String descricao; public String getDescricao() { return descricao; } public void setDescricao(String descricao) { this.descricao = descricao; } public List<Produto> getProdutos() { return produtos; } public void addProduto(Produto produto) { this.produtos.add(produto); } } To add a new product, instead:this.orcamento.getProduto().add(produto); You put it:this.orcamento.addProduto(produto); I also found some errors in the Crud class, such as not initializing the variable orcamento. You can do this in the class builder or direct in your statement. In the example below I made via constructor, so remember to pass the variable orcamento created in your main to it via builder like this: Crud ct = new Crud(orcamento);.Besides, you don't pass the produto for the method addProduto. Fixing would be like this:class Crud { private Orcamento orcamento; public Crud(Orcamento orcamento) { this.orcamento = orcamento; } public void adicionarProduto(Produto produto){ this.orcamento.addProduto(produto); produto.setOrcamento(orcamento); } }
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Delphi + MySQL and Bounds
Software Programming • mysql delphi demand • • zymir

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Sovereignty Fields It allows us to contact the cells of the current record.In your example Fields[0] - works correctly (returns the first cell of the current entry from the set, i.e. the contents text_answer current recording). Fields[1] He's making a mistake because there's no second column.Transfers to records should be carried out through methods First♪ NextIn your case, it would look like,i:=1; ADOQuery1.Open; while not ADOQuery1.Eof do begin // вполне возможно, радиобаттоны лежат на каком-нибудь контроле, например - панели. // тогда нужно проводить поиск по компонентам этой панели. // в этом примере поиск идет по форме. RadioButton:=FindComponent('RadioButton'+IntToStr(i)) as TRadioButton; RadioButton.Caption:=ADOQuery1.Fields[0].AsString; Inc(i); ADOQuery1.Next; end;
T

Time
Software Programming • delphi delphi 7 • • Trenton

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Dear /users/4924/%D0%BF%D0%B0%D0%B2%D0%B5%D0%BB-%D0%B1%D0%BE%D1%80%D1%89%D1%91%D0%B2 ♪After all, you need to fix the grammar because a man is tarnished, and not everyone will read such a galimat and deal with your clinos.Now, on the substance of the matter (there is a complaint that the Builder has given the opportunity to create in the interface the listed fields (Calculated Fields). These fields are not contained in the OBD tables and are virtual. They shall be filled at the time of request (but not mentioned in its text). After further progress, the courseor will be followed by the event of OnCalc Fields, the processor shall be provided with a code comparing today ' s date and date of expiry. If it's bigger today, this field can be filled with an appropriate line and even painted with some disturbing color.Good luck. "Teach good is easier than bad!"
C

How can I make a list with the elements that are present on one list but not on the other, with Python?
Software Programming • python • • Cleofas

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In the event that the elements are not repeated we could turn them to set and make the typical joint operations.list1 = ['1','2','3','4','5'] list2 = ['1','7','8','3','2'] set1 = set(list1) set2 = set(list2) print(set1-set2) Here we have made the difference operation of sets, which results in:{'4', '5'} This can lead to a function to make it more dynamicdef diferencia(c1,c2): return set(c1)-set(c2) #list(set(c1)-set(c2)) print(diferencia(list2,list1)) Here is a function that will receive 2 parameters (in principle it is thought to be lists). The function returns the result of converting to set and operate, bone that returns the value resulting from set(c1)-set(c2).This can also happen to a lambda function to make it more simplified, but for now I leave it this way.Outcome{'8', '7'} If you want the result to be a list, you must convert it using it. list() this can be added when you return the value or when you print it.
TcxCanvas, unlike TCanvas
Software Programming • delphi dbgrid • • Marcee

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You' StrCanvas like, TCanvasWho's going to make an object for you? In the first line of method, you're approaching StrCanvas.TextRect♪ Nothing. StrCanvas This place. = nil?procedure TFormClient.DrawGridCheckBox(Canvas: TcxCanvas; Rect: TRect; Checked: boolean); var StrCanvas : TCanvas; begin StrCanvas.TextRect(Rect, Rect.Left + 1, Rect.Top + 1, ' '); You want to use a ready canvas, take a canvas of shape:Canvas.TextRect(Rect, Rect.Left + 1, Rect.Top + 1, ' '); Just take into account that the size of the text will be considered for the type that is in shape.
Finding elements on the list
Software Programming • python • • Mystic

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We can do this:set(b).issubset(a) Since this decision is intended to be used setthe facilities contained in the lists should be maintained https://docs.python.org/3.8/glossary.html#term-hashable ♪
K

Expand list A, adding the list elements in square at the end
Software Programming • python • • Kadyn

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K

It's better to use it. List reductionwhich makes a direct argument a.extend([...])Then you'll have all the decisions in one line (not including the line of initialization and the line of withdrawal). Well, I'm actually on this one.But that's what you can do right on the original list. append New elements in the cycle, that's also an obvious option. (The only problem there is is is that you're irritating on a list that changes, but it's decided to take a copy of the list for irration).
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Manage Sequence Records with ClientDataSet (MultiUsuario)
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Well, after some tests, I came to a point that I managed to solve as follows:I use a trigger before insert (Firebird) to generate sequential. The code was like this: SELECT COALESCE(MAX(NUMERO_PEDIDO) + 1,1) FROM PEDIDO WHERE EMPRESA = NEW.EMPRESA INTO NEW.NUMERO_PEDIDO; IF (EXISTS(SELECT NUMERO_PEDIDO FROM PEDIDO WHERE EMPRESA = NEW.EMPRESA AND NUMERO_PEDIDO = NEW.NUMERO_PEDIDO)) THEN BEGIN SELECT COALESCE(MAX(NUMERO_PEDIDO) + 1,1) FROM PEDIDO WHERE EMPRESA = NEW.EMPRESA INTO NEW.NUMERO_PEDIDO; END Interesting that you leave only the first block to generate sequential without the test and two or more people include a record of the primary key error.
A

Why is the compiler making a mistake when entering the negative values of the list elements? IndexError: list index out of range
Software Programming • python 3.x list • • authera

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Let's let you in. 5 6 8Then on the first cycle, in terms i-1 number 4♪ And the element with that number on the list a No.I suggest a correction of your code:a = [int(g) for g in input().split()] b = 0 for i in a: print(i) b += i print(b) Either waya = [int(g) for g in input().split()] b = 0 for i in range(len(a)): print(a[i]) b += a[i] print(b)
A

Image, delphi
Software Programming • delphi • • Amritpal

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E

Since you don't give examples of your code, I'll try to tell one of the possible directions.Create a DLL with the resources of which your pictures will be stored and download them from there. And look at MSDN like LoadResource LoadBitmap LoadImage. ♪ ♪Use the blob database file to store the drawings. Like Access.Use the archive file like zip or rar for storage. There's a lot to do with the archives or use the dll function as proposed by RAR.Develop your data storage structure to store information on the number of images and stores on the file.
Where the return is List<list<string>> convert this result to only List<string> combining the elements</string></list<string>
Software Programming • java kotlin lambda expressions • • morde

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You can use the flatMap to "call" the results at a single level, bringing Stream<List<String>> for only the content of the streams List<String>: val x = list .stream() .flatMap { findMessages(it).stream() } .collect(Collectors.toList())
N

How to use hands on delphi?
Software Programming • delphi delphi 7 • • nishika

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Attributing it to a variable by reference. This simplifies access and search amount will be greatly reduced.var mi: TMenuItem; begin mi := TMenuItem(fmPrincipal.FindComponent('teste')); if mi <> nil then begin if mi.Visible then ... mi.Enabled:= ... end; end;
S

Selection of list elements by jQuery
Software Programming • jquery • • Saumya

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T

Like, $('ul ul constituentli:lt(3)') is if you need the first three sub-paragraphs of any big paragraph. Or $('ul:first ul constituentli:lt(3)' unless it's the first.

How do tie the procedure to the elements on the list?

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