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Keystore change passwords
...e my.keystore
To change the key's password:
keytool -keypasswd -alias <key_name> -keystore my.keystore
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Good examples of Not a Functor/Functor/Applicative/Monad?
... constructor which is an Applicative, but not a Monad:
newtype T a = T {multidimensional array of a}
You can make an Applicative out of it, with something like:
mkarray [(+10), (+100), id] <*> mkarray [1, 2]
== mkarray [[11, 101, 1], [12, 102, 2]]
But if you make it a monad, you could ...
How to get IP address of the device from code?
...nly on few devices and Emulator but let me know here if you find weird results.
// AndroidManifest.xml permissions
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
// test functions
Utils.getMACAdd...
The new syntax “= default” in C++11
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A defaulted default constructor is specifically defined as being the same as a user-defined default constructor with no initialization list and an empty compound statement.
§12.1/6 [class.ctor] A default constructor that is defaul...
How do you create a dictionary in Java? [closed]
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You'll want a Map<String, String>. Classes that implement the Map interface include (but are not limited to):
HashMap
LinkedHashMap
Hashtable
Each is designed/optimized for certain situations (go to their respective docs for more inf...
A proper wrapper for console.log with correct line number?
...r inheritance...?
Log.prototype.write = function (args) {
/// <summary>
/// Paulirish-like console.log wrapper. Includes stack trace via @fredrik SO suggestion (see remarks for sources).
/// </summary>
/// <param name="args" type="Array">list of...
Overriding the java equals() method - not working?
...uilder.reflectionHashCode(...). Saved me plenty of headache in the past - although of course if you just want to do "equals" on ID it may not fit your circumstances.
I also agree that you should use the @Override annotation whenever you're overriding equals (or any other method).
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Remove columns from dataframe where ALL values are NA
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Try this:
df <- df[,colSums(is.na(df))<nrow(df)]
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How to declare global variables in Android?
... work across processes (should your app be one of the rare ones that has multiple processes).
Something to note from the example above; suppose we had instead done something like:
class MyApp extends Application {
private String myState = /* complicated and slow initialization */;
public Str...
How to Set focus to first text input in a bootstrap modal after shown
... focus on the first input in this modal, and this is not happening by default.
So i wrote this code to do it:
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