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# This file includes example usage and tests for the 'run-with-cleanup' call-able function.

.PHONY: test test-success test-failure main cleanup

-include cleanup.mk

test:
    test.sh

main:

henrybear327

You might want to read this to get an introduction to armel vs armhf.

If the below is too much, you can try Ubuntu-ARMv7-Qemu but note it contains non-free blobs.

Running ARM programs under linux (without starting QEMU VM!)

First, cross-compile user programs with GCC-ARM toolchain. Then install qemu-arm-static so that you can run ARM executables directly on linux

If there's no qemu-arm-static in the package list, install qemu-user-static instead

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Table of Contents

• Installing
• Adding A Shortcut
• Process
• Features

henrybear327

To remove a submodule you need to:

• Delete the relevant section from the .gitmodules file.
• Stage the .gitmodules changes git add .gitmodules
• Delete the relevant section from .git/config.
• Run git rm --cached path_to_submodule (no trailing slash).
• Run rm -rf .git/modules/path_to_submodule (no trailing slash).
• Commit git commit -m "Removed submodule "
• Delete the now untracked submodule files rm -rf path_to_submodule

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Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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henrybear327

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

(A Russian translation of this article can be found here, contributed by Timur Demin.)

Why not?

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Concurrency Patterns in Go

Notes taken from Rob Pike's presentation 'Google I/O 2012 - Go Concurrency Patterns'.

1. Generator: function that returns a channel

The code is as follows:

c := boring("boring!")  // function returning a channel

for i := 0; i < 5; i++ {

henrybear327

進修計劃書

在大學期間的選修課程選擇，令我廣泛的接觸了多個不同的資訊研究領域。在這其中，我對於電腦視覺與圖形識別的發展特別有興趣，接下來也打算朝著這個方面進行探索，期許自己可以在進入研究所前，有更明確的研究方向。

短程- 進入研究所前

在取得入學許可之後，會盡速與相關實驗室進行聯絡，尋求意見與協助，以利未來入學做準備。並且複習電腦科學的基本課程，重新溫習一些重要的概念，不忘記基本的準則，為此後的研究進行準備。準備複習的內容為下表：

• 線性代數
• 離散數學

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Pretty print bookmarklet helper for Gist pages

Create a new bookmark somewhere handy in your browser with the following URL:

javascript:var el=document.createElement('style');el.media='print';el.innerHTML='#header,.pagehead.repohead,.gist-description.container,.file-box .meta,#comments,.js-comment-form,#footer{display:none;}.file-box{border:0!important;}';document.getElementsByTagName('head')[0].appendChild(el);alert('Please consider the environment before printing :)');

• Navigate to your Gist of choice
• Hit the bookmarklet
• Now print