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Remove rows with all or some NAs (missing values) in data.frame
...mptions --------------------
fakeData <- function(m, n, p){
set.seed(123)
m <- matrix(runif(m*n), nrow=m, ncol=n)
m[m<p] <- NA
return(m)
}
df <- cbind( data.frame(id = paste0('ID',seq(row_size)),
stringsAsFactors = FALSE),
data.frame(fak...
Guid.NewGuid() vs. new Guid()
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I'll add this for fun. For a 1% chance of collision, you'd need to generate about 2,600,000,000,000,000,000 GUIDs
– Clinton Ward
Aug 13 '12 at 16:20
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HTTP status code for update and delete?
...atus code is the request sent by the client is valid (DELETE mySite/entity/123) and the entity to delete does not exist.
– Martin
Dec 30 '11 at 21:27
69
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How do I print a double value without scientific notation using Java?
...
123
You could use printf() with %f:
double dexp = 12345678;
System.out.printf("dexp: %f\n", dexp)...
Best way to store time (hh:mm) in a database
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Another fun problem is if you are relying on the time component, it will not account for the Daylight savings adjustments when used at different times of the year.
– Chris Seufert
Nov 23 '17 at ...
Get an object properties list in Objective-C
...}
free(properties);
}
This required me to make a 'getPropertyType' C function, which is mainly taken from an Apple code sample (can't remember right now the exact source):
static const char *getPropertyType(objc_property_t property) {
const char *attributes = property_getAttributes(proper...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...╰ 0x00007fc09d1ece8e: jl 0x00007fc09d1ece60 ;*if_icmpge
Have fun storming the castle!
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Detect if called through require or directly by command line
...rk since accessing caller's module info is not straightforward, but it was fun to see how it could be done.
So the idea is to call a module and ask it if the caller module is the main one. We have to figure out the module of the caller function. My first approach was a variation of the accepted answ...
Why implement interface explicitly?
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Michael BMichael B
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How to create local notifications?
...notification.
Swift:
You AppDelegate.swift file should look like this:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
application.registerUser...