大约有 40,000 项符合查询结果(耗时:0.0551秒) [XML]

https://stackoverflow.com/ques... 

MySQL 'create schema' and 'create database' - Is there any difference

... CREATE SCHEMA is a synonym for CREATE DATABASE as of MySQL 5.0.2. this all goes back to an ANSI standard for SQL in the mid-80s. That standard had a "CREATE SCHEMA" command, and it served to introduce multiple name spaces for table and view names. All tables and views were created within a "s...
https://stackoverflow.com/ques... 

How are Python's Built In Dictionaries Implemented?

...e). Python dictionaries are implemented as hash tables. Hash tables must allow for hash collisions i.e. even if two distinct keys have the same hash value, the table's implementation must have a strategy to insert and retrieve the key and value pairs unambiguously. Python dict uses open addressin...
https://stackoverflow.com/ques... 

Java String split removed empty values

...[] split = data.split("\\|", -1); Little more details: split(regex) internally returns result of split(regex, 0) and in documentation of this method you can find (emphasis mine) The limit parameter controls the number of times the pattern is applied and therefore affects the length of the resultin...
https://stackoverflow.com/ques... 

When to use , tag files, composite components and/or custom components?

...nces be the only solution when a composite component doesn't suffice. Generally, having an <ui:include> with one or more <ui:param> which passes a managed bean property (and thus not a hardcoded value) is a signal that the include file can better be a tag file. Examples: How to create a...
https://stackoverflow.com/ques... 

Intercept page exit event

...ser might decide to navigate to another website and in doing so could lose all the edits they have not saved. 4 Answers ...
https://stackoverflow.com/ques... 

Get name of current script in Python

...hen used in the main module, this is the name of the script that was originally invoked. If you want to omit the directory part (which might be present), you can use os.path.basename(__file__). share | ...
https://stackoverflow.com/ques... 

TypeError: method() takes 1 positional argument but 2 were given

...- it's just that the first one is implicit, from the point of view of the caller. This is because most methods do some work with the object they're called on, so there needs to be some way for that object to be referred to inside the method. By convention, this first argument is called self inside ...
https://stackoverflow.com/ques... 

Regular expression matching a multiline block of text

...)((?:(?:\n|\r\n?).+)+)", re.MULTILINE) BTW, you don't want to use the DOTALL modifier here; you're relying on the fact that the dot matches everything except newlines. share | improve this answer ...
https://stackoverflow.com/ques... 

How do I read any request header in PHP

... IF: you only need a single header, instead of all headers, the quickest method is: <?php // Replace XXXXXX_XXXX with the name of the header you need in UPPERCASE (and with '-' replaced by '_') $headerStringValue = $_SERVER['HTTP_XXXXXX_XXXX']; ELSE IF: you run PHP...
https://stackoverflow.com/ques... 

How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?

...o far so good! But instead of rendering the fonts with a higher font size, all texts are just scaled up, too. That of course leads to very blurry text (on all controls like buttons etc.). ...