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Differences between “java -cp” and “java -jar”?
..., read the manifest and try to find out if the classpath entries are valid from where the jar is stored... That's avoidable.
I don't expect any performance advantages or disadvantages for either version. It's just telling the jvm which class to use for the main thread and where it can find the libr...
What does LINQ return when the results are empty
...!YourResult.Any())
Just a note that .Any will still retrieve the records from the database; doing a .FirstOrDefault()/.Where() will be just as much overhead but you would then be able to catch the object(s) returned from the query
...
How long should SQL email fields be? [duplicate]
... software that adheres closely to
extant RFCs but accept and parse input from peers that might not be
consistent with those RFCs." - Wikipedia) when writing software that
deals with email addresses. Furthermore, some software may be crippled
by naive assumptions, e.g. thinking that 50 charac...
How to debug heap corruption errors?
...ay off over the long run. The desirable feature list should look familiar from dmalloc and electricfence, and the surprisingly excellent book Writing Solid Code:
sentry values: allow a little more space before and after each alloc, respecting maximum alignment requirement; fill with magic numbers...
How to access a preexisting collection with Mongoose?
...get access to it with mongoose I did mongoose.connect("mongodb://localhost/fromlab"); var Schema = mongoose.Schema; var User = mongoose.model("User", new Schema({}), "users"); User.find({}, function(err, doc){ console.log((doc)) })
– jack blank
Sep 21 '1...
Elegant way to check for missing packages and install them?
...
Yes. If you have your list of packages, compare it to the output from installed.packages()[,"Package"] and install the missing packages. Something like this:
list.of.packages <- c("ggplot2", "Rcpp")
new.packages <- list.of.packages[!(list.of.packages %in% installed.packages()[,"Pac...
Finding Variable Type in JavaScript
...isArray or Object.prototype.toString.call to differentiate regular objects from arrays
typeof new Date() === 'object';
typeof new Boolean(true) === 'object'; // this is confusing. Don't use!
typeof new Number(1) === 'object'; // this is confusing. Don't use!
typeof new String("abc") === '...
What is the meaning of addToBackStack with null parameter?
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You can also add this to your answer from the API doc: Add this transaction to the back stack. This means that the transaction will be remembered after it is committed, and will reverse its operation when later popped off the stack. Parameters name An optional...
How to reset a timer in C#?
...cted, in
milliseconds. Specify
Timeout.Infinite to prevent the
timer from restarting. Specify zero
(0) to restart the timer immediately.
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How can I mock dependencies for unit testing in RequireJS?
...y to return the mock objects if they are there, but fallback to retrieving from the actual .js file if a mock is not provided? I've been trying to dig through the require code to figure it out, but I'm getting a little lost.
– Glen Hughes
Jul 29 '12 at 0:36
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