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Can someone explain __all__ in Python?
...xplicitly mentioned here, is exactly when __all__ is used. It is a list of strings defining what symbols in a module will be exported when from <module> import * is used on the module.
For example, the following code in a foo.py explicitly exports the symbols bar and baz:
__all__ = ['bar', '...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...of the information about the HTTP request, such as its URL, headers, query string and body. The response object provides the ability to control and send the HTTP response the way you want by, for instance, allowing you to set the headers and the body (usually with generated HTML content from a JSP f...
How can I check if a key exists in a dictionary? [duplicate]
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And, be sure to put the key name in quotes if it's a string.
– JAL
Oct 2 '10 at 11:04
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/data/user/0/xxxx/files（内部存储）和 /storage/emulated/0/Android/data...
...件）MediaScannerConnection.scanFile(context, new String[]{externalFile.getPath()}, null, null);
7. 注意事项Android 11+ 的权限限制：
如果应用以 Android 11 为目标版本，访问外部存储的其他应用私有目录会直接失败（即使有 MANAGE_EXTER...
How to elegantly deal with timezones
...ly update itself. The only thing that they stored were the datetime format string for the locale of the user.
I'm not saying it was the best approach, but it was a different one that I had not seen before. Maybe you'll glean some interesting ideas from it.
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Re-enabling window.alert in Chrome
...cted by this, and I was dumbfounded trying to figure out why the localized strings broke the alert while doing i18n, until I figured out I had simply tested it one too many times.
– falstro
Dec 5 '15 at 21:38
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How can I select the first day of a month in SQL?
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The casting of a string (i.e. "5/1/2009") to datetime is certainly more legible but we found code a while back that would return the first of the month...
DECLARE @Date DATETIME
//...
SELECT DATEADD(mm, DATEDIFF(mm,0,@Date), 0)
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Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
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By default
Primitives are passed by value. Unlikely to Java, string is primitive in PHP
Arrays of primitives are passed by value
Objects are passed by reference
Arrays of objects are passed by value (the array) but each object is passed by reference.
<?php
$obj=new stdClass();
$obj...
Get Image Height and Width as integer values?
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Don't work: getimagesize() expects parameter 1 to be string, resource given, function getimagesize expects filename
– lopisan
Aug 14 '15 at 7:48
add a co...
Download multiple files as a zip-file using php
...pfilename should read $zipname - it's the filename of the created zip as a string.
– Chris
Mar 31 '14 at 15:56
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