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What's the difference between sleep and wait?

Analeea last edited by

Different TimeUnit.SECONDS.sleep(1); from this.wait(1000)?
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O
Oba22 last edited by
wait Could be "built" by another flow using notify♪ sleep No way. Same. wait (sighs)notifyshould be synchronized block.
```
Object obj = ...;
synchronized (obj) {
    obj.wait();
} 
```
To date, current (exhaustive) flow is expected waits and releasesAnother flow can do
```
synchronized (obj) { obj.notify(); }
```
(laughs) objand the first flow will wake up. You might as well call. notifyAllIf more than one flow is expected, it will wake them all. However, only one of the flows will be able to capture the monitor (i.e.) wait Total synchronized block).
Another difference is that wait Called Objectwhile sleep Called Thread♪
If you sum it up, use it. sleep() for time-syncronization and wait() for multi-thread-synchronization.
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Are there differences between //, /* */ and #?
Software Programming • php • • rielyn

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The essential is this:O // and # are identical in terms of operation;O // and /* are completely different in terms of functioning, and each has a specific scenario of use:O // or # are to line comments. Everything that comes after them is ignored until a line break is found.Now, the /* is a block comment which can end: 1) before the end of the line; or 2) in different line from where it started. In both cases what determines the end of the comment is the sequence */;It has a third situation, https://pt.stackoverflow.com/questions/72473/70 , which is not comment, but also causes the code to be ignored from that point forward (it can be used to "ignor" a more extensive comment, or even have a special function for reuse of the source file).No difference at all.Notes:You cannot nest comments from block./* abc /* 123 */ def */ in the above case, the def is no longer commented, it will make a mistake. The first */ It's worth it. (The fact is that the second /* is ignored).It has a technique to "key" rather curious block comments, which is this (credits to the PHP comment section):When you define a block like this, just modify a bar to it "valer" or not://* Bloco "chaveável" com várias linhas. Em princípio, são duas linhas com "comment de linha" Basta modificar UMA barra, que vira um "comment de bloco" // */ Except only the first bar:/* Bloco "chaveável" com várias linhas. Em princípio, são duas linhas com "comment de linha" Basta modificar UMA barra, que vira um "comment de bloco" // */ Has a type of comment that is used in documentation tools (not part of the language itself) that is the /**. In practice is a normal block comment /* followed by an asterisk (although, https://github.com/php/php-src/search?q=T_DOC_COMMENT&unscoped_q=T_DOC_COMMENT , T_DOC_COMMENT).For more details, see this post: https://pt.stackoverflow.com/questions/94374/70
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How to put a successful alert on a data insert via ajax?
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var qtdRegistros = dados.length; var contador = 0; success: (function(data) { contador++; if (contador == dados.length) alert('Mensagem'); }); Implement a counter and compare if the logs entered are the same amount as that of your data.
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Data from firebase in graphview
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Fixed this task with the Cloud Functions violin, which is raised every day with help https://cron-job.org/en/
query mysql to count and group records of different days in different hours ranges
Software Programming • mysql • • emmalee

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Basically, the question is summarized in how to define GROUP BY to group dates that touch 2 different days. And the answer depends on which 2 days you want. In both cases, one way of achieving it is by adding or subtracting hours to the date so that all working hours remain under the same day.For example, let's say in the case of having 2 records with dates 14/03/2017 20:00:00 and 15/03/2017 05:59:59. If your wish is for both dates to grow low 14/03/2017 (with your last edition, it looks like this is what you're looking for), you can do it by making a GROUP BY of the date less than 6 hours (using addtime), and then extracting the date without the time using the function date. You can use that same expression in yours. SELECT and apply it date_format you want.SELECT date_format(date(addtime(carXesta_fechaHora, '-06:00:00')), '%Y-%m-%d'), ... ... GROUP BY date(addtime(carXesta_fechaHora, '-06:00:00')) (With your last edition, it seems you don't need this option. You can use the previous one) If on the other hand, your desire is for both dates to grow low 15/03/2017, then you can follow the same principle, but add 4 hours instead of subtracting 6 hours:SELECT date_format(date(addtime(carXesta_fechaHora, '04:00:00')), '%Y-%m-%d'), ... ... GROUP BY date(addtime(carXesta_fechaHora, '04:00:00')) EditionAnd to exclude records with dates outside the accepted hours, you need to add one more condition for that.AND (hour(carreraXestado.carXest_fechaHora) >= 20 OR hour(carreraXestado.carXest_fechaHora) < 6) So the consultation will remain this way:SELECT count(carreraXestado.carXest_estCar_id) AS num_carreras, date_format(date(addtime(carreraXestado.carXest_fechaHora, '-06:00:00')), '%Y-%m-%d') AS fecha FROM carreraXestado WHERE carreraXestado.carXest_fechaHora >= '2017-03-08 20:00:00' AND carreraXestado.carXest_fechaHora < '2017-03-14 06:00:00' AND carreraXestado.carXest_estCar_id = 6 AND (hour(carreraXestado.carXest_fechaHora) >= 20 OR hour(carreraXestado.carXest_fechaHora) < 6) GROUP BY date(addtime(carreraXestado.carXest_fechaHora, '-06:00:00'))
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Convert Unixtimestamp in Date
Software Programming • java android datha unixtimestamp • • chanisef

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Unixtimestamp in Java broadcasts in milliseconds. It's hard to guess, in milliseconds, you don't have much time to use a standard 4-bytes int, so you need to use a long type:timeLong = timeInt * 1000L; // или так: timeLong = (long)timeInt * 1000; So your code should look like:new SimpleDateFormat("HH:mm:ss").format(new Date(1432877865 * 1000L)) // или так: new SimpleDateFormat("HH:mm:ss").format(new Date((long)1432877865 * 1000)) I don't know whether or not you use kk to indicate the hours, but in case, you've identified it as HH (format 0-23)
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You can't share 0. In this case, we're just returning 0.
Software Programming • java • • emran

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... System.out.println(divide(1, 5)); // 0.2 System.out.println(divide(1, 0)); // 0.0 System.out.println(divide(5, 0)); // 0.0 System.out.println(divide(5, 1)); // 5.0 System.out.println(divide(0, 5)); // 0.0 ... public static double divide(double d1, double d2) { return d2 == 0 ? 0 : d1/d2; // если делитель равен 0, то возвращаем ноль, иначе же делим }
When comparing the same number of different types, is the result different with == and Equals?
Software Programming • • Bogopo

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Object.Equals(object)if the type is the sameoperator ==(T, T)If the result is differentfalseis a standard operation.However, in the example of the question sentence, it is overloadedintHomelongimplicit conversion is included and the type on the code does not match.The first two expressions, but the、al comparison of C# isintHomeuintHomelongHomeulongBecause it is only defined as a comparison betweenoperator ==(long, long)is selected.LastIEquatable<T>implementationInt64.Equals(long)Because there is an implicit conversion, this is also included.These resultsFalseThat’s why
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How to write the text in the photo.
Software Programming • java android • • meriah

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Bitmap bitmap = BitmapFactory.decodeStream(inputStream); //Создаем Bitmap содержащий нужное фото Canvas canvas = new Canvas(ditmap); //Создаем Canvas на его основе Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);// Создаем кисть со сглаживанием paint.setColor(Color.rgb(0, 0, 0)); //Ставим цвет paint.setTextSize(20); //Ставим размер текста в пикселях //делаем некоторые действия чтобы выяснить куда рисовать Rect bounds = new Rect();//объект, в который положим размеры, которые займет наш текст paint.getTextBounds(gText, 0, gText.length(), bounds); //вычисляем размеры текста, нарисованного этой кистью int x = (bitmap.getWidth() - bounds.width())/2; //зная ширину и высоту текста, вычисляем координаты верхнего левого угла надписи в координатах вашего фото, поменяйте на то что вам нужно int y = (bitmap.getHeight() + bounds.height())/2; canvas.drawText(gText, x, y, paint);//рисуем ваш текст в ваших координатах вашей кистью FileOutputStream fos = new FileOutputStream(outFile); //создаем поток для записи в итоговый файл bitmap.compress(CompressFormat.JPEG, 90, outputStream);//пишем в этот поток конвертированное в JPEG ил PNG изображение fos.close();//закрываем поток We could forget something, say the record in the file, we're definitely gonna have to wrap it up in the /catch, but the point should be caught.
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Letters sent through mail(s) are displayed differently on different postal services
Software Programming • php email objective c encoding afnetworking • • Amritpal

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The reason for the incoding of the service mail is not clear. $headers mail function clearly indicate code (in my case UTF-8)$header = "From: \"Admin\" <admin@site.com>\n"; $header .= "Content-type: text/plain; charset=\"utf-8\""; mail($to, $title, $mess, $header);
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How to combine different dataframes of different dimensions python pandas
Software Programming • python pandas • • zymir

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First we will create a reproducible example based on your example:import pandas as pd data = pd.DataFrame( {"Fecha": ("1995-01-01", "1995-01-02", "1999-08-24", "2000-03-21", "2018-10-13", "2018-12-31" ), "1": (4, 6, 7, 13, 23, 17), } ) ipc = pd.DataFrame( {"Año": (1995, 1996, 1999, 2000, 2017, 2018), "indice": (20.2, 40.3, 50.2, 70.4, 101.2, 104.4), } ) data["Fecha"] = pd.to_datetime(data["Fecha"], format='%Y-%M-%d', exact=True).dt.normalize() ipc["Año"] = pd.to_datetime(ipc["Año"], format='%Y').dt.normalize() Based on the basis that both columns are dated type (Datetime64, <M8, >M8, ...) we can simply apply pandas.DataFrame.merge. The key is to apply it to the attribute dt.year of columns Fecha and Año:res = data.merge( ipc["indice"], how="left", left_on=data["Fecha"].dt.year, right_on=ipc["Año"].dt.year ) res.drop('key_0', axis=1, inplace=True) >>> res Fecha 1 indice 0 1995-01-01 4 20.2 1 1995-01-02 6 20.2 2 1999-01-24 7 50.2 3 2000-01-21 13 70.4 4 2018-01-13 23 104.4 5 2018-01-31 17 104.4
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How to make the modular window contents different for different blocks
Software Programming • javascript c sharp asp.net mvc • • emerson

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All those who seek information on this issue. Genius, as always, simple.If they don't come up with JS, in the cycle, each block is given ID data-target=#@item.LinkID (in my case)<div class="col-xs-12 col-sm-4 col-md-4 link-item linkCard"> <div class="thumbnail"> <img class="imgCardLink" data-toggle="modal" data-target="#@item.LinkID" title="Подробнее..." src="http://checkitlink.com/img/screen/3596.jpeg"> <div class="caption"> <h5 data-toggle="modal" data-target="#showLink"> And we're doing the same in the fashion window id=@item.LinkID."<div class="modal" id="@item.LinkID" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> The cards now have different IDs and each ID fashion window has an appropriate card.Good luck!
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Explain the difference.
Software Programming • php mysql phpmyadmin • • baileigh

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Imagine my user name is D'Artagnan.Try the second request and do it.It's not gonna work. More specifically:... VALUES('Д'Артаньян', ... The database will decide that the name is D, and then some blighbourd.Because when you put the variable directly on the request, that is, the risk that the variable content will be interpreted as part of the request. And at best, there's a mistake, and at worst, breaking the website.That's why you always have to use the first option when the variables are in the request not directly, but through the markers, that's how you have question marks. In fact, PDO supports not only question marks but also labelled markers, type :name - It's easier for some to read.
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How do I change the color of AlertDialog
Software Programming • java android alertdialog • • esther

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To change the properties of a https://developer.android.com/reference/android/app/AlertDialog.html , you should add the style to the builder of the dialog box:alerta = new AlertDialog.Builder(this, R.style.DialogStyle); In this way, you can create the configuration you want within the DialogStyle.<style name="DialogStyle" parent="@android:style/Theme.Material.Light.Dialog.Alert"> <item name="android:colorAccent">@color/material_blue_700</item> </style> Note that the use of this constructor is only available at the level https://developer.android.com/reference/android/app/AlertDialog.Builder.html .
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How to change Look and Feel (Swing)
Software Programming • java swing • • gionna

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I decided five minutes later. UIManager.setLookAndFeel(com.formdev.flatlaf.FlatLightLaf()); Replace by UIManager.setLookAndFeel("com.formdev.flatlaf.FlatLightLaf");
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BASH: Write a random number until the user writes "s" or "S"
Software Programming • bash shell shell sc languageript • • Cleofas

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To start, if you want to define a content variable that enters the user, use this.read exit_key That is, it removes the weight sign (or dollar or whatever you call it) $ by defining. You will only use it when you make use of the variable, not by defining it.Then another problem of your script is logic, that is, in the line where you askwhile [ "$exit_key" != 's' ] || [ "$exit_key" != 'S' ] osea, if the user writes something different from "s" or "S" he warns you in the face, then, when you run it and introduce it, say, the letter "s" turns out that happens the first condition, that is false, which is good, but it turns out that "s" and "S" are different, which gives true in your second condition. Like token || execute the following instruction if the previous "false act," then, put whatever it is, will execute what is inside the loop while. Since if it is not "s" to the first, then "returns real" and runs, but if it is "s" then gives false in the first and true in the second, then it also runs.What you could do is change the operator || for the && And your program would be something like that. #!/bin/bash echo "A continuació s'escriuràn numeros aleatoris." echo "Si en qualsevol moment vols parar, pressiona la tecla 's' o 'S'." read exit_key while [ "$exit_key" != 's' ] && [ "$exit_key" != 'S' ] do echo "$RANDOM" done Now that if, as I understood, you want to get me to throw you down and ask if you want to continue selling numbers one by one, you can use this script.`#!/bin/bash echo "A continuació s'escriuràn numeros aleatoris." while : # Es lo equivalente a un "while True" do echo -n "Si en qualsevol moment vols parar, pressiona la tecla 's' o 'S': " read exit_key [[ "$exit_key" =~ ^(s|S)$ ]] && exit # ^^^^^^ ------- Usa una expresion regular para asegurarse # que "exit_key" sea igual a "s" o "S" echo "$RANDOM" done

What's the difference between sleep and wait?

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