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Save PL/pgSQL output from PostgreSQL to a CSV file
...truction \copy. \copy invokes COPY FROM STDIN or COPY TO STDOUT, and then fetches/stores the data in a file accessible to the psql client. Thus, file accessibility and access rights depend on the client rather than the server when \copy is used.
Your application programming language may also have ...
Why use Ruby instead of Smalltalk? [closed]
...rary of most of the main smalltalk implementations (VisualWorks, VisualAge etc.) was large and had reputation for a fairly steep learning curve. Most key functionality in Smalltalk is hidden away somewhere in the class library, even basic stuff like streams and collections. The language paradigm i...
Macro vs Function in C
...hort _square_us(unsigned short a) { return a * a; }
/* ... long, char ... etc */
#define square(a) \
_Generic((a), \
float: _square_fl(a), \
double: _square_dbl(a), \
int: _square_i(a), \
...
What platforms have something other than 8-bit char?
...
Control Data mainframes (CDC-6400, 6500, 6600, 7600, Cyber 170, Cyber 176 etc.) 6-bit chars, packed 10 per 60-bit word.
Unisys mainframes: 9 bits/byte
Windows CE: simply doesn't support the `char` type at all -- requires 16-bit wchar_t instead
...
How to change the name of a Django app?
...step is deployed through all active checkouts (CI, other devs, production, etc) before the next step is tackled, it worked perfectly -- no problems with the existing historical migrations. Do the steps in order, and propagate the changes everywhere before moving to the following step.
...
Variable number of arguments in C++?
...builder pattern (as in operator<<() in streams) or default arguments etc. These are all safer: the compiler gets to know more about what you're trying to do so there are more occasions it can stop you before you blow your leg off.
...
iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]
...
All apps will continue to work in the vertically stretched screen from what I could tell in today's presentation. They will be letterboxed or basically the extra 88 points in height would simply be black.
If you only plan to support iOS 6+, then definitely consider using Auto...
How to pipe stdout while keeping it on screen ? (and not to a output file)
...dev/tty".
Using "wc" for "foo", the above examples work OK (on linux, OSX, etc.) as:
% echo 'Hi' | tee /dev/tty | wc
Hi
1 1 3
To add a count at the bottom of a list of matching files, I use something like:
% ls [A-J]* | tee /dev/tty | wc -l
To avoid having to remember all...
Mediator Vs Observer Object-Oriented Design Patterns
...ter themselves and receive notifications upon events, e. g. ButtonListener etc.
Both of these patterns allow for lesser coupling, but are quite different.
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Get/pick an image from Android's built-in Gallery app programmatically
...savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.Button01)
.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// in onCreate or a...