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nil detection in Go
...ck every member for its
respective zero value (e.g. host == "", port == 0, etc.) or have a private field which
is set by an internal initialization method. Example:
type Config struct {
Host string
Port float64
setup bool
}
func NewConfig(host string, port float64) *Config {
retu...
Appropriate datatype for holding percent values?
...r potentially even into the negatives).
Treat value 1 as 100%, 0.5 as 50%, etc. This will allow any math operations to function as expected (i.e. as opposed to using value 100 as 100%).
Amend precision and scale as required (these are the two values in brackets columnName decimal(precision, scale)....
How does the “final” keyword in Java work? (I can still modify an object.)
...erent ways depending on what it's used on:
Value types: For ints, doubles etc, it will ensure that the value cannot change,
Reference types: For references to objects, final ensures that the reference will never change, meaning that it will always refer to the same object. It makes no guarantees w...
Should the folders in a solution match the namespace?
...olders equals namespaces
One type per file (class, struct, enum, delegate, etc.) makes it easy to find the right file
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REST HTTP status codes for failed validation or invalid duplicate
... thrown error or a business constraint error in REST) or other HTTP errors etc...
From the code, it's hard to understand what was the failure reason, a HTTP (transport) failure or a REST (logical) failure.
If the HTTP request physically was performed successfully it should always return 200 code, ...
What is the recommended batch size for SqlBulkCopy?
... If it works, then I keep doubling the number of rows (e.g. to 2000, 4000, etc.) until I get a timeout.
Otherwise, if a timeout occurs at 1000, then I decrease the number of rows by half (e.g. 500) until it works.
In each case, I keep doubling (if successful) or halving (if failed) the difference ...
Are there any O(1/n) algorithms?
...he numbers, minimum of time that sleep can wait, time to process arguments etc.): this limit would then be a constant lower bound so in fact the above function still has runtime O(1).
But there are in fact real-world algorithms where the runtime can decrease (at least partially) when the input size...
Haskell: Where vs. Let
... has a different emphasis and you see both used in math papers, textbooks, etc. Generally, variables that are sufficiently unintuitive that the formula doesn't make sense without them should be defined above; variables that are intuitive due to context or their names should be defined below. For exa...
Android studio, gradle and NDK
... for each architecture you’re targeting (e.g. x86, arm, mips, arm64-v8a, etc…)
The code you want to be compiled by default by the NDK toolchain will be located in (module)/src/main/jni and similarly to above, you can change it by setting sourceSets.main.jni.srcDirs in your module’s build....
Joda-Time: what's the difference between Period, Interval and Duration?
... is a lapse of "civil time", expressed as a number of months, days, hours, etc. It does not -by itself- represent a "physical" interval, hence it can't be directly converted to a duration (months have variable lengths...).
This answers question 3: you can only divide by two a physical time (a durat...