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How do you create a random string that's suitable for a session ID in PostgreSQL?
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202ed325-b8b1-477f-8494-02475973a28f
May be worth reading the docs on UUID too
The data type uuid stores Universally Unique Identifiers (UUID) as defined by RFC 4122, ISO/IEC 9834-8:2005, and related standards. (Some systems refer to this data type as a globally unique i...
Using setImageDrawable dynamically to set image in an ImageView
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However using setImageResource() "does Bitmap reading and decoding on the UI thread, which can cause a latency hiccup ... consider using setImageDrawable() or setImageBitmap()." (Android documentation)
– chetto
Oct 25 '12 at 18:30
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Virtual Memory Usage from Java under Linux, too much memory used
...ory-map a JAR, you can access the files within it very efficiently (versus reading it from the start each time). The Sun JVM will memory-map all JARs on the classpath; if your application code needs to access a JAR, you can also memory-map it.
Per-thread data for two threads. The 1M block is the thr...
UnboundLocalError on local variable when reassigned after first use
...nd parsing.
Consider how the parse of this line of code works. The lexer reads the source text and breaks it into lexemes, the "smallest components" of the grammar. So when it hits the line
c+=1
it breaks it up into something like
SYMBOL(c) OPERATOR(+=) DIGIT(1)
The parser eventually wants ...
Read password from stdin
... });
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Jquery - How to make $.post() use contentType=application/json?
... anyKey: "anyvalue and type" } will be application/json. Many servers that read json, will only allow an object or array, not a string--thus why jquery predicts things this way. If you have a server that reads strings, numbers, etc without being wrapped in an object, you must specify the content-typ...
LINQ to read XML
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How to force file download with PHP
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Read the docs about built-in PHP function readfile
$file_url = 'http://www.myremoteserver.com/file.exe';
header('Content-Type: application/octet-stream');
header("Content-Transfer-Encoding: Binary");
header("Content-disposi...
Why use the params keyword?
...e) [] {} to Calls where it doesn't apply.
Btw, imho, the safest (and most readable practice) is to:
pass via Named Parameters (which we can now do even in C# ~2 decades after we could in VB ;P) (because:
1.1. it's the only way that guarantees prevention of unintended values passed to Parameter...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
...用如下命令查看：
mysql> SHOW SLAVE STATUS;
Master_Log_File & Read_Master_Log_Pos：下一个传输的主日志信息。
Relay_Master_Log_File & Exec_Master_Log_Pos：下一个执行的主日志信息。
Relay_Log_File & Relay_Log_Pos：下一个执行的中继日志信息。
理...