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How do I make a list of data frames?
...f data frames here are three good choices:
# base option - slower but not extra dependencies
big_data = do.call(what = rbind, args = df_list)
# data table and dplyr have nice functions for this that
# - are much faster
# - add id columns to identify the source
# - fill in missing values if some...
Interfaces with static fields in java for sharing 'constants'
...ittenConstants
{
private KittenConstants() {}
public static final String KITTEN_SOUND = "meow";
public static final double KITTEN_CUTENESS_FACTOR = 1;
}
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How do getters and setters work?
...utorial is not really required for this. Read up on encapsulation
private String myField; //"private" means access to this is restricted
public String getMyField()
{
//include validation, logic, logging or whatever you like here
return this.myField;
}
public void setMyField(String value)
...
Too many 'if' statements?
... the coding style to their own langauge. The question was how to avoid a string of ifs. This shows how.
– GreenAsJade
Mar 20 '14 at 12:33
6
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How to set HttpResponse timeout for Android in Java
...wer to include a manual DNS lookup with a custom timeout:
//Our objective
String sURL = "http://www.google.com/";
int DNSTimeout = 1000;
int HTTPTimeout = 2000;
//Get the IP of the Host
URL url= null;
try {
url = ResolveHostIP(sURL,DNSTimeout);
} catch (MalformedURLException e) {
Log.d("I...
Why does Javascript's regex.exec() not always return the same value? [duplicate]
...be a very useful feature. You can start the evaluation at any point in the string if desired, or if in a loop, you can stop it after a desired number of matches.
Here's a demonstration of a typical approach to using the regex in a loop. It takes advantage of the fact that exec returns null when t...
Hidden Features of MySQL
...
Binary Protocol:
MySQL 4.1 introduced a binary protocol that allows non-string data values to be sent
and returned in native format without conversion to and from string format. (Very usefull)
Aside, mysql_real_query() is faster than mysql_query() because it does not call strlen()
to opera...
Add Variables to Tuple
...
To add a string to the tuple without breaking the string itself check stackoverflow.com/a/16449189
– Enzo Ferey
Dec 24 '17 at 19:24
...
Loop inside React JSX
...this with a ul (unordered list). <ul> {objects.map((object:string,i:number)=>{ return <li>{object}</li> })} </ul> using TypeScript
– Roberto C Navarro
Sep 28 '15 at 20:10
...
How do I make my GUI behave well when Windows font scaling is greater than 100%
...nction StandardizeFormFont(AForm: TForm): Real;
var
preferredFontName: string;
preferredFontHeight: Integer;
begin
GetUserFontPreference({out}preferredFontName, {out}preferredFontHeight);
//e.g. "Segoe UI",
Result := Toolkit.StandardizeFormFont(AForm, PreferredFontName, Pre...