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List comprehension vs map
...hen you explicitly mutate them; they are containers.
And a bonus: numbers, strings, and tuples are even more predictable since they cannot change at all; they are values.
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Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean
...notation to the class.
@Stateless
public class BookingService {
public String makeReservation(Item Item, Customer customer) {
...
...
}
}
Stateless beans must have a dependent scope while a stateful session bean can have any scope. By default they are transactional, but you can use t...
What are the best JVM settings for Eclipse? [closed]
...the C launcher shim eclipse.exe will still look for the "Sun Microsystems" string, but with 6u21b7, it will now work - again.
For now, I still keep the -XX:MaxPermSize version (because I have no idea when everybody will launch eclipse the right JDK).
Implicit `-startup` and `--launcher.library`...
Multiple working directories with Git?
...gitster -- in commit 2c608e0, 28 Jul 2016)
git worktree lock [--reason <string>] <worktree>
git worktree unlock <worktree>
If a linked working tree is stored on a portable device or network share
which is not always mounted, you can prevent its administrative files from
being pru...
Do you (really) write exception safe code? [closed]
...e in code
Eschew std::sprintf, snprintf, and arrays in general - use std::ostringstream for formatting and replace arrays with std::vector and std::string
When in doubt, look for functionality in Boost or STL before rolling your own
I can only recommend that you learn how to use exceptions properl...
社交应用组件 · App Inventor 2 中文网
... Twitter.
SearchTwitter(query)
This searches Twitter for the given String query.
Requirements: This should only be called after the IsAuthorized event has
been raised, indicating that the user has successfully logged in to Twitter.
StopFollowing(user)
Stops following a user.
...
When writing a directive in AngularJS, how do I decide if I need no new scope, a new child scope, or
...utes evaluated in the context of the parent scope; they are either one-way strings ('@'), one-way expressions ('&'), or two-way variable bindings ('=').
On self-contained components, it doesn't make sense to need to apply other directives or attributes on it because it exists by itself. Its st...
Why does NULL = NULL evaluate to false in SQL server
...not mean they're equal. If when you think of NULL you think of “NULL” (string) then you probably want a different test of equality like Postgresql's IS DISTINCT FROM AND IS NOT DISTINCT FROM
From the PostgreSQL docs on "Comparison Functions and Operators"
expression IS DISTINCT FROM expression
...
How to profile a bash shell script slow startup?
... do better -- using \D{...} in PS4 allows completely arbitrary time format strings to be expanded without the performance overhead of launching date as a subprocess.
– Charles Duffy
Jul 18 '13 at 21:35
...
How to sort my paws?
...atial pattern of paw impacts. "paw_labels" should be a sequence
of the strings: "LH", "RH", "LF", "RF" corresponding to the different paws"""
# Check for problems... (This could be written a _lot_ more cleanly...)
problems = False
last = paw_labels[0]
for paw, dy, dx in zip(paw_l...