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Syntax analyzer (grammatical engineering) ?

carriann last edited by

We need to build a syntax analyzer. In particular, for the language to create a context-dependent grammar (LL), there are examples only for numbers and signs, I have only four letters (A, B, C, D) and they need to build a grammar. Any examples of grammar construction?
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inna last edited by

http://ru.wikipedia.org/wiki/LL-%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7%D0%B0%D1%82%D0%BE%D1%80#.D0.9F.D1.80.D0.B8.D0.BC.D0.B5.D1.80 Not a bad example. Grammas is just a set of rules. The syntax analysis table merely reflects the application of these rules.
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namespace, classes and reduction of syntax
Software Programming • c++ • • Trenton

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You can write.namespace blabla { namespace math { }} There are no other ways at this moment.In the next version of C++, there will be modules (two years minimum), but they do not cancel the namespace.
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How do you turn off the same syntax in PyCharm?
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Settings
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Split the line
Software Programming • java lines gson syntax analysis • • Rossere

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I usually do usually, there's never been a problem. try{ JSONArray result = new JSONArray( url ); for( int i=0; i<result.length(); i++ ) { JSONObject itemJsonObject = result.getJSONObject( i ); JSONArray itemArrayGroup = itemJsonObject.getJSONArray( "Group" + i ); for( int j=0; j<itemArrayGroup.length();j++ ) { String cID = itemArrayGroup.getJSONObject(j).getString("id"); String cName = itemArrayGroup.getJSONObject(j).getString("name"); anyAction( cID , cName ); } } } catch (JSONException e) { Log.d("error","error : " + e.getMessage() ); }
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How do you dissolve mhtml?
Software Programming • php paracer • • gionna

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"ed_printable_decode() is the function of the php that set me up. Saw @splash58, thank you!
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Inscription of the buoyancy cycle
Software Programming • php paracer simple html dom • • Saumya

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Use the method. array_push($arr, $link)and then return the mass with the values you need.function ($links) { $arr = []; foreach ($links as $link) { array_push($arr, $link); } return $arr; }
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Why this SQL syntax error?
Software Programming • mysql sql • • emerson

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Your script is generating an SQL with the clause LIKE without the simple quotes.Something like:SELECT * FROM imovel WHERE 0 OR CATEGORIA LIKE %CASA% OR CATEGORIA LIKE %CASA EM CONDOMINIO% OR CATEGORIA LIKE %COBERTURA% What is not valid according to operator documentation http://dev.mysql.com/doc/refman/5.0/en/string-comparison-functions.html#operator_like the /questions/tagged/mysql .The solution is to include quotes in building your Array, as:foreach($termos as $termo){ $sql[] = 'CATEGORIA LIKE \'%'.$termo.'%\''; } //ou foreach($termos as $termo){ $sql[] = "CATEGORIA LIKE '%".$termo."%'"; }
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Where is the reason for Undefined variable: mas_cat_child?
Software Programming • php paracer • • amarantha

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Well, maybe because you're trying to manipulate the variable before it's initialized.$mas_cat_child[]=$ln; Here, he's trying to turn to a variable like a mass. Where's the announcement? Where's the indication that this is a mass?print_r($mas_cat_child); Especially a printout. If the line is empty, the $mas_cat_child won't be here.
Excel/Javascript
Software Programming • javascript excel masses syntax analysis shells • • Demir

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See the symbol code in the table of symbols (e.g., in the Win, it is somewhere in Puske or in the interior search) and indicate the code. It's if you have to break it. If it's hands, you can put it through Alt+Numpad_Code.Hold on. You're switching on the SWAT. That's what you're looking at. In the program, just a gap and \n/r or just EOL (end of line) in php.
for syntax sugar?
Software Programming • for any language • • Alberto

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for Not syntax sugar, because it can be done with things that can't be done with it without resorting to external design. For example, for life time, RAII objects are given for the exact time of the cycle, for example (c++ code): for (Foo i{0, some_mutex}; i<10; i++){ // Тут класс Foo это RAII который захватит мьютекс и освободит его по завершению цикла. ... ... } If it was used while, it would be necessary to have an extra space of names.
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How do you dissolve the line php?
Software Programming • php regular expression syntax analysis • • Kadir

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This is where you can test: http://writecodeonline.com/php/ $array; $search_string = '<a class="history-item product" title="USB Keyboard Leather Cover Case Bag for 7" Tablet PC MID PDA VIA 8650,Free Shipping + Drop Shipping" href="http://www.aliexpress.com/product-gs/495886336-USB-Keyboard- Leather-Cover-Case-Bag-for-7-Tablet-PC-MID-PDA-VIA-8650- Free-Shipping-wholesalers.html">USB Keyboard Leather Cover Case Bag for 7" Tablet PC MID PDA VIA 8650,Free Shipping + Drop Shipping</a>'; preg_match('/(?<=[t][i][t][l][e][=]["]).+?(?=["])/',$search_string, $array); echo '<br>Здесь title: '; $title = $array[0]; echo $title; $array2; preg_match('/(?<=[>]).+?(?=[<])/',$search_string, $array2); echo '<br>Здесь ссылка: '; $link_a = $array2[0]; echo $link_a;
do while with alternative syntax
Software Programming • php • • Laycee

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The structure of do...while in php is very simpledo{ cuarpo del bloque }while(condición para repetir) In your example<?php $art = $articulos->fetch->object(); ?> <p>Categoría: <?=$art->categoria?></p> <?php do{ ?> <p><?=$art->nombre?></p> <p><?=$art->descripcion?></p> <?php }while($art = $articulos->fetch->object()); ?> The block repeats itself while the condition in while() is true. At least it is repeated once, so this loop can serve you.
Syntax error if in script csh
Software Programming • bash • • Mystic

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The correct would be:if ( $?QINST_VERBOSE ) then set expert_mode = 1 else set expert_mode = 0 fi if ( $?QINST_DEBUG ) then set debug = 1 else set debug = 0 fi
Question of syntax JS ajax
Software Programming • javascript ajax json • • Demir

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I know your name...This is the logic that JS interprets.Creates a variable called a counterInvokes an HXR call, that is Ajax.Evaluate the counterA little more practical it would be, you're making a soup and you need 2 potatoes, but you don't have one, so you send your child to the market for 2 potatoes, but just when you send it you ask if you already have 2 potatoes, but your child doesn't come back. This is how an asynchronous invocation works.It would fix your code a little since you are not using all the ES6 goodties.<script> const validarRut = async () => { let contador = 0; const ajax = {}; ajax.url = 'validar_rut_alias.php'; ajax.dataType = 'json'; try { const result = await $.ajax( ajax ); const alias = $('#alias').val().trim(); const rut = $('#rut').val().trim(); result.data.map( ( nombre ) => { if (nombre.alias === alias || nombre.rut === rut) { contador += 1; } }); return !(contador > 0); } catch (e) { console.log('Ocurrió un error ', e); } }; const registrado = validarRut(); console.log( 'Esta registrado', registrado ); </script>
QLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax (PHP and MySQL)
Software Programming • php mysql • • Marcee

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Try to write the table and column names between two crases ("`...`"), as below:$query = "INSERT INTO `{$this->prefix}order` (`order_date`, `order_time`, `order_code`, `reference`, `value_freight`, `freight_type`, `client_id`, `orderStatus_id`) VALUES ... If the variable $this->prefix do not return anything, will only the word order, which is a reserved word of MySQL. The crases would solve this problem, ignoring any reserved word among them.
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Simple Rule Engine
Software Programming • java java 8 • • Raziyah00

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I suggest you do something like this and transfer it outside as an option: public class TaskSuspenderActions<T> { private final Map<String, Supplier<T>> actions; // TaskSuspenderAction - просто интерфейс, реализация в данном случае не важна private Supplier<T> defaultAction; //Конструктор с пустой мапой public TaskSuspenderActions(Supplier<T> defaultAction) { this.defaultAction = defaultAction; this.actions = new HashMap<>(); } // Конструктор принимающий мапу с экшенами public TaskSuspenderActions(Supplier<T> defaultAction, Map<String, Supplier<T>> actions){ this.actions = actions; this.defaultAction = defaultAction; } // Конструктор заполняющий мапу с помощью переданного кансюмера public TaskSuspenderActions(Supplier<T> defaultAction, Consumer<Map<String, Supplier<T>>> actionMapper) { this(defaultAction); actionMapper.accept(actions); } // Этот сетер нужен если мапа не имутабл public void setActionForInternalStatus(String internalStatus, Supplier<T>action){ actions.put(internalStatus, action); } @NotNull public T get(@NotNull final String internalStatus) { return actions.getOrDefault(internalStatus, defaultAction).get(); } }

Syntax analyzer (grammatical engineering) ?

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