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Accessing class variables from a list comprehension in the class definition
...entions class scopes explicitly:
The scope of names defined in a class block is limited to the class block; it does not extend to the code blocks of methods – this includes comprehensions and generator expressions since they are implemented using a function scope. This means that the following...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...地图：
百度地图的uri参考地址：http://lbsyun.baidu.com/index.php?title=uri/api/web?（5）本程序的前台界面如图10-9所示：（6）后台程序模块如图10-10所示：
图10-7 将输入的文本读出来的程序设计
Timeout a command in bash without unnecessary delay
...ime-out expiration SIGTERM (15) is sent to the process. If the signal
# is blocked, then the subsequent SIGKILL (9) terminates it.
#
# Based on the Bash documentation example.
# Hello Chet,
# please find attached a "little easier" :-) to comprehend
# time-out example. If you find it suitable, fe...
What is the maximum length of latitude and longitude? [closed]
...
More on lat/lng precision: mysql.rjweb.org/doc.php/latlng#representation_choices
– Rick James
Mar 4 '19 at 0:08
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Center a popup window on screen?
...ops = Number((screen.height/2)-(h/2));
window.open("templates/sales/index.php?go=new_sale", '', 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+tops+', left='+left);
...
Why use a READ UNCOMMITTED isolation level?
... relevant to a decision. In fact, if you can't pull a small subset without blocking it might be for the good reason that it's being currently edited.
Historical data. It rarely makes a practical difference but whereas users understand constantly changing data can't be perfect, they don't feel the sa...
scp or sftp copy multiple files with single command
...edu:/some/remote/directory/
Source: http://www.hypexr.org/linux_scp_help.php
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Building a notification system [closed]
...r users on the site, I would tie them with nodejs + websockets client with php pushing update to nodejs for all listeners as change gets added.
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answe...
What's the fuss about Haskell? [closed]
...pically happen when you run the above program is this: the program reads a block (say 8KB) of the first file, then writes it to the second file, then reads another block from the first file, and writes it to the second file, and so on. (Try running strace on it!)
... which looks a lot like what the...
How to set the thumbnail image on HTML5 video?
...
<?php
$thumbs_dir = 'E:/xampp/htdocs/uploads/thumbs/';
$videos = array();
if (isset($_POST["name"])) {
if (!preg_match('/data:([^;]*);base64,(.*)/', $_POST['data'], $matches)) {
die("error");
}
$data = $matches[2];
$data ...