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How to force file download with PHP
...
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...
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...
LINQ to read XML
... });
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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...
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...
constant pointer vs pointer on a constant value [duplicate]
...ecause these sit to the right of the variable name) this becomes a case of reading from right-to-left.
So with char *const a; you have a, which is a const pointer (*) to a char. In other words you can change the char which a is pointing at, but you can't make a point at anything different.
Convers...
Making macOS Installer Packages which are Developer ID ready
...he Distribution.xml you can change things like title, background, welcome, readme, license, and so on. You turn your component packages and distribution definition with this command into a product archive:
$ productbuild --distribution ./Distribution.xml \
--package-path . \
./Installer.pkg...
Blocks and yields in Ruby
... I agree. I don't think I knew half of the stuff explained until I read it.
– theIV
Jun 18 '10 at 1:58
1
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java get file size efficiently
...rn the file length. It returns the amount of bytes which are available for read without blocking other streams. It is not necessarily the same amount of bytes as file length. To get the real length from a stream, you really need to read it (and count the read bytes meanwhile).
–...
Mean per group in a data.frame [duplicate]
...his type of operation is exactly what aggregate was designed for:
d <- read.table(text=
'Name Month Rate1 Rate2
Aira 1 12 23
Aira 2 18 73
Aira 3 19 45
Ben 1 53 19
Ben 2 22 87
Ben 3 19...