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What makes JNI calls slow?
...ime compiled for this specific machine -- they're already compiled.
A Java array may be copied for access in native code, and later copied back. The cost can be linear in the size of the array. I measured JNI copying of a 100,000 array to average about 75 microseconds on my Windows desktop, and 82 m...
Standard concise way to copy a file in Java?
....copy();
EnumSet<FileVisitOption> fileVisitOpts;
if (Arrays.toList(options).contains(java.nio.file.LinkOption.NOFOLLOW_LINKS) {
fileVisitOpts = EnumSet.noneOf(FileVisitOption.class)
} else {
fileVisitOpts = EnumSet.of(FileVisitOption.FOLLOW_LINK...
How to sort objects by multiple keys in Python?
...
Then you could split the string into an array first by calling some_string.split(",")
– Jason Creighton
Jul 17 '09 at 15:44
...
How do I serialize an object and save it to a file in Android?
...
I've tried this 2 options (read/write), with plain objects, array of objects (150 objects), Map:
Option1:
FileOutputStream fos = context.openFileOutput(fileName, Context.MODE_PRIVATE);
ObjectOutputStream os = new ObjectOutputStream(fos);
os.writeObject(this);
os.close();
Option2:
...
Is Python strongly typed?
...;
On a little-endian platform with 32-bit integers, this makes i into an array of the numbers 0x64636261 and 0x00676665. In fact, you can even cast pointers themselves to integers (of the appropriate size):
intptr_t i = (intptr_t)&sz;
And of course this means I can overwrite memory anywhere...
How to convert View Model into JSON object in ASP.NET MVC?
...
Json.Encode encodes my 2-dimensional array to a 1-dimensional array in json. Newtonsoft.Json.JsonConvert.SerializeObject serializes the two dimensions properly into json. So I suggest to use the latter one.
– mono68
Feb 5 '...
Get local IP address
...sses you could simply manipulate the original function to always return an array instead of a single string. For example:
public static string[] GetAllLocalIPv4(NetworkInterfaceType _type)
{
List<string> ipAddrList = new List<string>();
foreach (NetworkInterface item in NetworkI...
Logging in Scala
...have more than two values to interpolate, since then you need to create an Array of values to interpolate.
A more Scala like solution is to use a thunk or cluster to delay the concatenation of the error message. A good example of this is Lift's logger
Log.scala
Slf4jLog.scala
Which looks like th...
How to format a DateTime in PowerShell
...ts(),
$d = Get-Date
$d.GetDateTimeFormats()
This outputs a large string-array of formatting styles for the date-value. You can then pick one of the elements of the array via the []-operator, e.g.,
PS C:\> $d.GetDateTimeFormats()[12]
Dienstag, 29. November 2016 19.14
...
Fast way of finding lines in one file that are not in another?
... stores the entire contents of file1 line by line in a line-number indexed array ll1[], and the entire contents of file2 line by line in a line-content indexed associative array ss2[]. After both files are read, iterate over ll1 and use the in operator to determine if the line in file1 is present in...