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$ openssl x509 -in ios_development.cer -inform DER -text -noout

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security find-identity -v -p codesigning

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$ openssl req -text -noout -in CertificateSigningRequest.certSigningRequest

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$ openssl genrsa -out mykey.key 2048
$ openssl req -new -key mykey.key -out CertificateSigningRequest.certSigningRequest -subj "/[email protected], CN=Your Name Dev Key, C=GB"

andrewwoz

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "[email protected]"

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demeter-law-swift

The Law of Demeter in swift.

The Law of Demeter for methods attempts to minimize coupling between classes in any program. In short, the intent of this "law" is to prevent you from reaching into an object to gain access to a third object's methods.

###Good example

andrewwoz

import Foundation

func + <K,V>(left: Dictionary<K,V>, right: Dictionary<K,V>)
    -> Dictionary<K,V>
{
    var map = Dictionary<K,V>()
    for (k, v) in left {
        map[k] = v
    }
    for (k, v) in right {

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func numberToBaseString(number:Int,base:Int) -> String {

    var inner_func:(Int,Int,String) -> String = { (_,_,_) -> String in return "" }
    
    inner_func = { (number:Int,base:Int,result:String) -> String in
        if number < base {
            return String(number) + result
        }else{
            let rem = number % base
            let reducedNumber = (number - rem) / base