Question: after exporting to p.12 in MacOSX, can i run the following 3 step in Linux? Or i must get it done in the same machine where i export to P.12 before i upload to Linux server to use with my php script?

```
openssl pkcs12 -clcerts -nokeys -out apns-dev-cert.pem -in apns-dev-cert.p12
openssl pkcs12 -nocerts -out apns-dev-key.pem -in apns-dev-key.p12
openssl rsa -in apns-dev-key.pem -out apns-dev-key-noenc.pem

```

Answer: 
```
double dArray[][];

```

is Array-of-arrays while

```
double dArray[,];

```

is a two dimentional array.

it's easy enough to look them up.

[MSDN Reference link](http://msdn.microsoft.com/en-us/library/aa288453%28v=vs.71%29.aspx)
The last syntax is easy, it declares a multidimensional array of doubles. Imagine the array is 3x2, then there would be 6 doubles in the array.

The 1st syntax declares a jagged array. The second syntax is rectangular or square, but this syntax need not be. You could have three rows, followed by 3 columns, then 2 columns, then 1 column, ie: its jagged.

```
2nd: 1-1, 1-2, 1-3
     2-1, 2-2, 2-3

1st: 1-1, 1-2, 1-3
     2-1, 2-2,
     3-1,

```