| // Copyright 2021 Google LLC | |
| // SPDX-License-Identifier: Apache-2.0 | |
| #include <cstddef> // ptrdiff_t | |
| #include <string> | |
| #include <tuple> | |
| #include <utility> | |
| namespace introspect { |
This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
| #!bash.exe | |
| export SSH_AUTH_SOCK=/tmp/.ssh-socket | |
| echo ; | |
| echo Starting connection with ssh-agent... | |
| ssh-add -l 2>&1 >/dev/null | |
| if [ $? = 2 ]; then | |
| rm -f /tmp/.ssh-script /tmp/.ssh-agent-pid /tmp/.ssh-socket | |
| # Exit status 2 means couldn't connect to ssh-agent; start one now | |
| echo Creating new ssh-agent... | |
| ssh-agent -a $SSH_AUTH_SOCK > /tmp/.ssh-script |
A lot of math grad school is reading books and papers and trying to understand what's going on. The difficulty is that reading math is not like reading a mystery thriller, and it's not even like reading a history book or a New York Times article.
The main issue is that, by the time you get to the frontiers of math, the words to describe the concepts don't really exist yet. Communicating these ideas is a bit like trying to explain a vacuum cleaner to someone who has never seen one, except you're only allowed to use words that are four letters long or shorter.
What can you say?
| <dl> | |
| <dt>selector</dt> | |
| <dd>dl</dd> | |
| <dt>apply</dt> | |
| <dd> | |
| <ul> | |
| <li> | |
| <dl> | |
| <dt>selector</dt> | |
| <dd>> dt</dd> |
| // Given a prototype-like object, create a class based on that object's | |
| // properties. | |
| function buildClass(spec) { | |
| // Throw an exception of the argument is inappropriate: | |
| if (typeof(spec) != 'object' || spec === null) | |
| throw 'expected an object.'; | |
| var empty = true; | |
| for (var name in spec) { empty = false; break; } | |
| if (empty) | |
| throw 'expected a non-empty object.'; |
