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In Java, what is the best way to determine the size of an object?
...ents, use VMSupport.vmDetails(). On Oracle JDK 1.8.0_40 running on 64-bit Windows (used for all following examples), this method returns
Running 64-bit HotSpot VM.
Using compressed oop with 0-bit shift.
Using compressed klass with 3-bit shift.
Objects are 8 bytes aligned.
Field sizes by type: 4, 1...
Clang vs GCC - which produces faster binaries? [closed]
...built for Linux with both GCC and Clang,
and with Microsoft's compiler for Windows. The tool, coan, is a preprocessor
and analyser of C/C++ source files and codelines of such: its
computational profile majors on recursive-descent parsing and file-handling.
The development branch (to which these re...
Hidden Features of MySQL
...projects with a great free database. I develop application data servers on windows platforms mostly with MySQL. The worst mess I had to straighten out was
The ultimate MySQL legacy database nightmare
This required a series of appplications to process the tables into something usefull using many of...
Multiple working directories with Git?
...
For those using msysgit (windows) you can use this ported version of the script: github.com/joero74/git-new-workdir
– amos
Jan 13 '12 at 9:24
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What is an optional value in Swift?
...icate either a specific kind of value, or a lack of value — e.g. does my window have a delegate, and if so, who is it? Optionals are Swift's type-safe, memory-safe way to do this.
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What are the main disadvantages of Java Server Faces 2.0?
...g and navigating to the same view (independently of the opened browser tab/window!), either synchronously or asynchronously (Ajax). See also Difference between View and Request scope in managed beans and How to choose the right bean scope?
Although practically all disadvantages of JSF 1.x were elim...
Do you (really) write exception safe code? [closed]
...vert back to C and avoid C++ libraries, as well as external surprises like Windows SEH).
Writing exception safe code
To write exception safe code, you must know first what level of exception safety each instruction you write is.
For example, a new can throw an exception, but assigning a built-in (e....
Perforce for Git users? [closed]
...stick these settings in your shell config file, use p4 set to save them on Windows and OS X, or use a Perforce config file.
1) Create a workspace
p4 workspace
# set your root to where your files should live:
Root: /Users/matt/work
# in the resulting editor change your view to map the depot files...
How to “perfectly” override a dict?
...ase info (the strings are paths to files displayed to the user, but it's a windows app so internally all operations must be case insensitive)
I needed keys to be as small as possible (it did make a difference in memory performance, chopped off 110 mb out of 370). This meant that caching lowercase ve...
u'\ufeff' in Python string
... It is not required for UTF-8, but serves only as a signature (usually on Windows).
Output:
utf-8 'ABC'
utf-8-sig '\xef\xbb\xbfABC'
utf-16 '\xff\xfeA\x00B\x00C\x00' # Adds BOM and encodes using native processor endian-ness.
utf-16le 'A\x00B\x00C\x00'
utf-16be '\x00A\x00B\x00C'
utf-8 ...