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When to use f:viewAction / preRenderView versus PostConstruct?
... I mentioned bean scope because @PostConstruct would only be called once if the bean were SessionScoped (at the time bean is first created) but preRenderView would be called every time the page is accessed. Or did I get that wrong?
– BestPractices
...
How do JavaScript closures work?
...eclared outside the function, regardless of when and where the function is called.
If a function was called by a function, which in turn was called by another function, then a chain of references to outer lexical environments is created. This chain is called the scope chain.
In the following code, i...
What does the Java assert keyword do, and when should it be used?
...In fact, the assert checks are turned off by default.
However, it is critically important that invariant checks continue to be done in production. This is because perfect test coverage is impossible, and all production code will have bugs which assertions should help to diagnose and mitigate.
Ther...
Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes
...and it still didn't work. I ended up having to add an environment variable called HOME set to the directory my .ssh folder was in
– Justin
Dec 31 '13 at 21:31
...
Reshaping data.frame from wide to long format
...as melt/cast. Here is a solution with reshape, assuming your data frame is called d:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
...
NHibernate ISession Flush: Where and when to use it, and why?
...
Briefly:
Always use transactions
Don't use Close(), instead wrap your calls on an ISession inside a using statement or manage the lifecycle of your ISession somewhere else.
From the documentation:
From time to time the ISession will execute the SQL statements needed to synchronize the ADO.NET...
Invalidating JSON Web Tokens
... their password. Thus if the password changes, any previous tokens automatically fail to verify. You can extend this to logout by including a last-logout-time in the user's record and using a combination of the last-logout-time and password hash to sign the token. This requires a DB lookup each time...
jQuery scroll to element
...rolled to the right position, and if a user copies the URL it will automatically snap to the right place on the page.
– Sander
Jan 23 '14 at 8:09
10
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What is the colon operator in Ruby?
... 0.180000 0.000000 0.180000 ( 0.179374)
Both symbol tests are basically the same as far as speed. After 1,000,000 iterations there's only 0.004733 second difference, so I'd say it's a wash between which to use.
shar...
bind event only once
...
The obvious solution is to not call someMethod() twice. If you can't fix that, then you can keep a state variable so it only ever binds once like this:
function someMethod()
{
if (!someMethod.bound) {
$(obj).click(function() {});
some...