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What is referential transparency?
...hing that an expression refers to. It is roughly the same as what we mean by "meaning" or "denotation" in programming language semantics. Using Andrew Birkett's example (blog post), the term "the capital of Scotland" refers to the city of Edinburgh. That is a straightforward example of a "referen...
How to use OrderBy with findAll in Spring Data
...t;StudentEntity, Integer> {
public List<StudentEntity> findAllByOrderByIdAsc();
}
The code above should work. I'm using something similar:
public List<Pilot> findTop10ByOrderByLevelDesc();
It returns 10 rows with the highest level.
IMPORTANT:
Since I've been told that it's e...
Environment variables in Mac OS X
...
There's no need for duplication. You can set environment variables used by launchd (and child processes, i.e. anything you start from Spotlight) using launchctl setenv.
For example, if you want to mirror your current path in launchd after setting it up in .bashrc or wherever:
PATH=whatever:you:...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
... @stakx: Nevertheless it is getting deprecated and superseded by unique_ptr with clearer and more powerful semantics.
– UncleBens
May 2 '10 at 10:47
3
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What are the security risks of setting Access-Control-Allow-Origin?
...
By responding with Access-Control-Allow-Origin: *, the requested resource allows sharing with every origin. This basically means that any site can send an XHR request to your site and access the server’s response which woul...
How to force Selenium WebDriver to click on element which is not currently visible?
...
Selenium determines an element is visible or not by the following criteria (use a DOM inspector to determine what css applies to your element, make sure you look at computed style):
visibility != hidden
display != none (is also checked against every parent element)
opacit...
What is the garbage collector in Java?
...he Java Virtual Machine which gets rid of objects which are not being used by a Java application anymore. It is a form of automatic memory management.
When a typical Java application is running, it is creating new objects, such as Strings and Files, but after a certain time, those objects are not u...
Brew update failed: untracked working tree files would be overwritten by merge
...
you might want to do also git add . followed by git stash :P
– mkk
Feb 28 '14 at 16:30
W...
What's the _ underscore representative of in Swift References?
...
Swift gives the first parameter name in a method a local parameter name by default, and gives the second and subsequent parameter names both local and external parameter names by default.
On the other hand, functions by default don't have external parameter names.
For example, we have this foo...
Multiple commands in gdb separated by some sort of delimiter ';'?
...en printed a backtrace, but it doesn't.
You can accomplish the same thing by calling into the Python interpreter.
python import gdb ; print(gdb.execute("s")) ; print(gdb.execute("bt"))
It's possible to wrap this up into a dedicated command, here called "cmds", backed by a python definition.
Here...