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how to declare char * with input of {"data": "0001"}'


By : Kuba Urbańczyk
Date : October 16 2020, 08:10 PM
should help you out From C++11 onwards, you have the option of using raw string literals.
With that you will be able to do this:
code :
const char * u = R"({ "data": "0001" }')";
const char * u = "{ \"data\": \"0001\" }'";


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How can I avoid gcc warning for plain "char" to : "unsigned char" OR "signed char" convers


By : Slickwall
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The switches -funsigned-char and -fsigned-char do not refer to char *.
You might use -Wno-pointer-signto switch off the warning you receive.

how to use <input type="" class="" form-control" id="" placeholder="">


By : Omar Hassan
Date : March 29 2020, 07:55 AM
will be helpful for those in need If you want to add additional attributes to form controls generated by HTML Helpers, then you can use the htmlAttribues parameter of one of TextBoxFor's overloads.
code :
<div class="form-group">
    @Html.TextBoxFor(a => a.UserName, new { @class = "form-control", id = "usertxt", placeholder = "Your name" })
</div>

C++ Array Sort - problem accounting for "bbba" and "0001" as incorrect sorts


By : rafylamb
Date : March 29 2020, 07:55 AM
Hope this helps You don't need to test for 0 or 1 at start (since the for loop already has the i code :
for(int i=1; i<len; ++i) {
    if(sArr[i-1] > sArr[i]) return false;
}
return true;

Every change of the input is stored separately as data (ex : "t", "te", "tes", "test&


By : user3148059
Date : March 29 2020, 07:55 AM
will be helpful for those in need EDIT:
In the StackSnippet below, I have updated your example (OPs example can be found here) showing how you can get values on submit:
code :
const { useState } = React;

const WORD_LIST = ["Foo", "Bar", "Baz", "Rock", "Paper", "Scissors", "Hello", "Goodbye"];

function InviteInput(props) {
  const { value, onChange } = props;
  const handleChange = e => {
    onChange && onChange(e);
  };
  return (
    <li>
      <input
        value={value}
        onChange={handleChange}
        className="form-input"
        type="email"
        placeholder="nom@exemple.com"
        name="invites"
        required
      />
    </li>
  );
}

function AddInviteButton(props) {
  return (
    <button onClick={props.onClick}>
      Ajouter une autre personne // (Add another person)
    </button>
  );
}

function InviteForm({ onSubmit, initialInputCount }) {
  const [nbInvites, setNbInvites] = useState(
    [...Array(initialInputCount).keys()].map(i=>WORD_LIST[i])
  );

  const onAddInviteClick = () => {
    //let id = nbInvites.length + 1;
    setNbInvites([
      ...nbInvites,
      //{
        //id,
        //***********************************************************
        // THIS IS WHERE YOU SET THE DEFAULT VALUE FOR NEW INPUTS
        //***********************************************************
        /*value:*/ WORD_LIST[Math.floor(Math.random() * WORD_LIST.length)]
        //***********************************************************
      //}
    ]);
  };

  const handleChange = (event, index) => {
    let newstate = [...nbInvites];
    newstate[index]/*.value*/ = event.target.value;
    setNbInvites(newstate);
  };

  const handleSubmit = event => {
    onSubmit(event, nbInvites);
  };

  return (
    <div>
      {nbInvites.map((item, index) => {
        return (
          <InviteInput
            key={index}
            value={item}
            onChange={e => handleChange(e, index)}
          />
        );
      })}
      <AddInviteButton onClick={onAddInviteClick} />
      <br />
      <button onClick={handleSubmit}>Soumettre // Submit</button>
    </div>
  );
}

function App() {
  const [formVals, setFormVals] = useState();

  const doSubmit = (event, formValues) => {
    setFormVals(formValues);
  };

  return (
    <div className="page">
      <h2 className="box-title">
        Qui sont les eleves de cette classe ? // (Who are the students in this
        class?)
      </h2>
      <p>
        Vous pourrez toujours en ajouter par la suite // (You can always add
        some later)
      </p>
      <InviteForm onSubmit={doSubmit} initialInputCount={5} />
      {formVals ? <pre>{JSON.stringify(formVals, null, 2)}</pre> : ""}
    </div>
  );
}

ReactDOM.render(<App />, document.body);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.9.0/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.6/umd/react-dom.production.min.js"></script>
function Test() {
  const [inputs, setInputs] = React.useState([{
    id: 1,
    value: "1 initial"
  }, {
    id: 2,
    value: "2 initial"
  }]);
  
  const handleChange = (event, index) => {
    let newstate = [...inputs];
    newstate[index].value = event.target.value;
    setInputs(newstate);
  }
  
  const addInput = () => {
    let id = inputs.length + 1;
    setInputs([...inputs, {
      id,
      value: `${id} initial`
    }])
  }
  
  return(
    <div>
      <button onClick={addInput}>Add Input</button>
      {inputs.map((item, index) => {
        return <div><input type="text" value={inputs[index].value} onChange={e=>handleChange(e,index)} /></div>
      })}
    </div>
  );
}

ReactDOM.render(<Test />, document.body);
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.9.0/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.6/umd/react-dom.production.min.js"></script>

How can I change an user input char eg. "abcDEF" and return an output "222333"


By : Juraj Guniš
Date : March 29 2020, 07:55 AM
I hope this helps you . You could use a lookup key map then transform your string. A sample with C++11 lambda and C++03:
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