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What is the logic behind the “using” keyword in C++?
...::f; // lift Base's f into Derived's scope -- works in C++98
void f(char); // provide a new f
void f(int); // prefer this f to Base::f(int)
using Base::Base; // lift Base constructors Derived's scope -- C++11 only
Derived(char); // provide a new constructor
Der...
What's the difference between the various methods to get a Context?
...e:
public class MyApplication extends Application {
public static String getPackageName() {
String packageName = null;
try {
PackageInfo mPackageInfo = getApplicationContext().getPackageManager().getPackageInfo(getApplicationContext().getPackageName(), 0);
...
Split (explode) pandas dataframe string entry to separate rows
I have a pandas dataframe in which one column of text strings contains comma-separated values. I want to split each CSV field and create a new row per entry (assume that CSV are clean and need only be split on ','). For example, a should become b :
...
map function for objects (instead of arrays)
...
There is no need to add an extra HTTP call and an extra library just for one function. In any case, this answer is now outdated and you can simply call Object.entries({a: 1, b: 2, c: 3}) to get an array.
– user6269864
...
How do I stop a web page from scrolling to the top when a link is clicked that triggers JavaScript?
...the way to handle an empty fragment identifier:
2. If fragid is the empty string, then the indicated part of the document is the top of the document
Using a href of "#!" instead works simply because it avoids this rule. There's nothing magic about the exclamation mark - it just makes a convenient ...
Overriding superclass property with different type in Swift
...
This seems to work
class Chassis {
func description() -> String {
return "Chassis"
}
}
class RacingChassis : Chassis {
override func description() -> String {
return "Racing Chassis"
}
func racingChassisMethod() -> String {
return "Wro...
How to execute XPath one-liners from shell?
...this query, use the -wrap option on the command line. If you just want the string value of the attribute, add /string() to the query.
– Michael Kay
Mar 26 '13 at 18:25
...
Android: Difference between Parcelable and Serializable?
...Parcelable;
public class MyObjects implements Serializable {
private String name;
private int age;
public ArrayList<String> address;
public MyObjects(String name, int age, ArrayList<String> address) {
super();
this.name = name;
this.age = age;
...
How to sort objects by multiple keys in Python?
... So this does work well. I call my function with the list and string as parameters. I split the string first then call the multikeysort with the list and the list of keys from the split string. It does not matter which item in the string has the '-' at the start of the column name, beca...
Jade: Links inside a paragraph
... "<a href='$2'>$1</a>");
return jade.compile(txt)();
};
jadestring = ""+ // p.s. I hate javascript's non-handling of multiline strings
"h1 happy days\n"+
":inline\n"+
" p this can have [a link](http://going-nowhere.com/) in it"
f = jade.compile(jadestring);
console.log(f());...