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Questions tagged [memo]

144 questions
21
votes
1 answer

Why does memo.Lines use TStrings instead of TStringList?

Why does Memo.Lines use the abstract class TStrings? Why doesn't it use TStringList instead? And should I convert it to TStringList before working with it?
Illiou
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20
votes
3 answers

Typescript generic class equivalent for React.memo

Is there any way to set new generic in React.memo? For example, for class components, I can use // set generic class GenericClass extends PureComponent {} // and use like this /> In the below…
Thu San
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20
votes
3 answers

React memo components and re-render when passing function as props

Suppose I have these React components: const Compo1 = ({theName}) => { return ( console.log('Dr. ' + theName)}/> ); }; const Compo2 = ({theName}) => { function theFoo() { console.log('Dr. ' + theName); } return…
rodrigocfd
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13
votes
5 answers

React.memo isn't working - what am I missing?

I'm in the process of refactoring some of our components so I'm trying to incorporate memoization as some components may re-render with the same values (for example, hotlinked image URLs unless they are the same). I have a simple component: const…
user.io
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9
votes
2 answers

React.useMemo does not update the data

I am new to hooks. So this might be easy yet I have no idea how to solve: I have a function like this which takes two arrays columns and data . and those data should be memoized or else it does not work. (recommended by react-table guys) function…
Amir Shahbabaie
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9
votes
3 answers

How do I shallow test a react component wrapped in memo and withStyles?

I have a component which is wrapped in both a Material-UI withStyles HOC and a React memo HOC. I am unable to test this component as I am unable to call dive(): ShallowWrapper::dive() can only be called on components The only option I am currently…
Ed Allonby
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9
votes
12 answers

DBGrid showing "(MEMO)" as the value of string fields

I'm trying to write a simple SQLite application using Lazarus and the SQLdb components. I connect to the database and populate a TDBGrid. Problem is that all columns that are text fields display the value "(MEMO)" rather then the string in database.
HandyGandy
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9
votes
9 answers

Why C/C++ have memory issue?

I have read lots of programmers saying and writing when programming in C/C++ there are lots of issue related to memory. I am planning to learn to program in C/C++. I have beginner knowledge of C/C++ and I want to see some short sample why C/C++ can…
LinuxNewbie
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9
votes
2 answers

How to intercept (detect) a Paste command into a TMemo?

How to catch Paste command and change text of Clipboard before that text is pasted into a TMemo, but, after Paste, text in Clipboard must be same like before changing? Example, Clipboard have text 'Simple Question', text that go in the TMemo is…
Srdjan Vukmirica
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8
votes
5 answers

Newline Inside a String To Be Shown At a TMemoBox

I'm building a String called FullMemo, that would be displayed at a TMemoBox, but the problem is that I'm trying to make newlines like this: FullMemo := txtFistMemo.Text + '\n' + txtDetails.Text What I got is the content of txtFirstMemo the…
Nathan Campos
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7
votes
1 answer

Pass Children prop to React Memo component

I am currently in the process of optimising a number of React SFC components with the use of React.memo. Most of these components have children. The project also uses TypeScript. I was starting to get the impression that memo components did not…
Adam McKenna
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7
votes
4 answers

Load Log.txt From other apps to Memo - Delphi7

I am trying to record the session log from other applications (Proxifier) to a Memo. I've tried using the command : procedure TForm1.TimerTimer(Sender: TObject); begin Memo1.Lines.LoadFromFile('C:\PMASSH\Proxyfier\Profiles\Log.txt'); end; but at…
Pujangga Adhitya
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5
votes
3 answers

How I can replace strings in a memo (FastReport)?

I have a memo object in my report, and a need replace "%...%" strings. For example, in Rave Report: MemoBuf.ReplaceAll('%my_str%', "new string", false); But, don't exists a method (or property) to replace text, in the FastReport. How I can do…
André
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5
votes
2 answers

How do I apply React.memo to all components in an array?

Is it possible to apply React.memo to an array of components with a for loop? Say I have the following three components: const Item1 = (props) => { const { index } = props; return (
{index}
); } const Item2…
Amos
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5
votes
2 answers

Delphi - AutoComplete Memo

I am requiring a Memo with Auto-completion functionality. Ultimately, I would like the ability to display a custom auto-completion list when the user presses a hotkey (Ctrl-space) similar to Delphi IDE auto-completion. I have the TMS AdvMemo, but…
Simon
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