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App Inventor 2 数学代码块 · App Inventor 2 中文网
...表中出现次数最多的元素 (mode)
拓展案例：
案例：文本转数字
案例：数字转文本
案例：指定将二进制的某一位(Bit)改为1
案例：指定将二进制的某一位(Bit)改为0
内置块中找不到你要查找的数学代码块？
一些数学代...
How to initialise a string from NSData in Swift
...
Swift 2.X or older
let datastring = NSString(data: fooData, encoding: NSUTF8StringEncoding)
Swift 3 or newer:
let datastring = NSString(data: fooData, encoding: String.Encoding.utf8.rawValue)
This doc explains the syntax.
...
What's the fundamental difference between MFC and ATL?
...red Document Storage, Serialization and Versioning, Automation (from early VBA years), and of course MVC. The latest versions have support for Visual Studio style window docking, and the Office ribbon. Basically every technology out of Redmond in 20 years is in there somewhere. It's just HUGE!
H...
MySQL Cannot Add Foreign Key Constraint
...th. e.g. VARCHAR(20)
Collation Columns charset should be the same. e.g. utf8
Watchout: Even if your tables have same Collation, columns still could have different one.
Unique - Foreign key should refer to field that is unique (usually primary key) in the reference table.
...
Export and Import all MySQL databases at one time
...efault-character-set as you need.
mysql -uroot -p --default-character-set=utf8
mysql> SET names 'utf8';
mysql> SOURCE backup.sql;
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XmlWriter to Write to a String Instead of to a File
...L is in UTF-8. You can fix this by subclassing StringWriter;
public class Utf8StringWriter : StringWriter
{
public override Encoding Encoding
{
get { return Encoding.UTF8; }
}
}
This will affect the declaration written by XmlWriter. Of course, if you then write the string out...
PHP DOMDocument loadHTML not encoding UTF-8 correctly
... is still an issue) - this is a really annoying problem, because I defined utf8 in the HTML document (with <meta charset="UTF-8" />) but that has no effect, it seems to need the <?xml part, which is totally unintuitive.
– iquito
Apr 20 '16 at 14:00
...
Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La
...
If you have UTF8, use this (actually works with SVG source), like:
btoa(unescape(encodeURIComponent(str)))
example:
var imgsrc = 'data:image/svg+xml;base64,' + btoa(unescape(encodeURIComponent(markup)));
var img = new Image(1, 1);...
Read and write a String from text file
... do {
try text.write(to: fileURL, atomically: false, encoding: .utf8)
}
catch {/* error handling here */}
//reading
do {
let text2 = try String(contentsOf: fileURL, encoding: .utf8)
}
catch {/* error handling here */}
}
Swift 2.2
let file = "file.txt" /...
How to view UTF-8 Characters in VIM or Gvim
...
Try to reload the document using:
:e! ++enc=utf8
If that works you should maybe change the fileencodings settings in your .vimrc.
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