tkersey

Quick access

• Compiling Swift Generics

• Steve Yegge & Gene Kim's Vibe Coding ebook due Fall '25

2025

April

• Protecting keys with the Secure Enclave

  Create an extra layer of security for your private keys.

  Keeping a private key in a keychain is a great way to secure it. The key data is encrypted on disk and accessible only to your app or the apps you authorize. However, to use the key, you must briefly copy a plain-text version of it into system memory. While this presents a reasonably small attack surface, there’s still the chance that if your app is compromised, the key could also become compromised. As an added layer of protection, you can protect a private key using the Secure Enclave. >

tkersey

extension UIView {
  func calculatePreferredHeight(preferredWidth: CGFloat? = nil) -> CGFloat {
    let width = preferredWidth ?? frame.width
    let widthConstraint = NSLayoutConstraint.constraintsWithVisualFormat("H:[view(==\(width)@999)]", options: .allZeros, metrics: nil, views: ["view": self])
    addConstraints(contraint)
    let height = systemLayoutSizeFittingSize(UILayoutFittingCompressedSize).height
    removeConstraints(constraint)
    return height
  }
}

tkersey

"fundamental constants of human-computer interaction", which can be split into the human and computer halves.

Very roughly:

~16 ms – frame budget for interactive animation
100 ms – user action feels instantaneous
200 ms – typical human reaction time
500+ ms – perceptible delay
3+ seconds – perceived sluggishness
10+ seconds – attention span is broken

tkersey

Verifying myself: My Bitcoin username is +tk. https://onename.io/tk

tkersey

Keybase proof

I hereby claim:

• I am tkersey on github.
• I am twk (https://keybase.io/twk) on keybase.
• I have a public key whose fingerprint is 53D0 44AE 9245 5BF9 ACB4 7ACF ACBE D759 C16F 62B7

To claim this, I am signing this object:

tkersey

found at: http://fascinated.fm/post/2379188731/getting-a-motorola-sbg6580-into-bridge-mode-on

Getting a Motorola SBG6580 into “Bridge” mode on TimeWarner Wideband

1. Unplug coax cable from Motorola
2. Hold down the white reset button on the back panel with a pen for 30s.  This resets all settings to factory defaults. The modem will be auto-reconfigured once you plug in the coax cable.
3. When modem is back on plug in a computer with an Ethernet cable into the modem.
4. Connect to http://192.168.0.1 and login with “admin” / “motorola”
5. Now you will make some changes:
 

• Wireless -> Primary Network -> Disabled

tkersey

|ψ> = α|0> β|1>

tkersey

http://stackoverflow.com/questions/927358/git-undo-last-commit

Undo a commit and redo

$ git commit ...
$ git reset --soft HEAD^      (1)
$ edit                        (2)
$ git commit -a -c ORIG_HEAD  (3)
This is most often done when you remembered what you just committed is incomplete, or you misspelled your commit message, or both. Leaves working tree as it was before "reset".

tkersey

Remove file from git repository (history)

SOLUTION: This is the shortest way to get rid of the files:

1. check .git/packed-refs - my problem was that I had there a refs/remotes/origin/master line for a remote repository, delete it, otherwise git won't remove those files

2. (optional) git verify-pack -v .git/objects/pack/#{pack-name}.idx | sort -k 3 -n | tail -5 - to check for the largest files

3. (optional) git rev-list --objects --all | grep #{SHA_FROM_#_3} - to check what files those are