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Powerlevel9k

Browser histories

Unless you are using Safari on OSX, most browsers will have some kind of free plugin that you can use to export the browser's history. So that's probably the easiest way. The harder way, which seems to be what Safari wants is a bit more hacky but it will also work for other browsers. Turns out that most of them, including Safari, have their history saved in some kind of sqlite database file somewhere in your home directory.

The OSX Finder cheats a little bit and doesn't show us all the files that actually exist on our drive. It tries to protect us from ourselves by hiding some system and application-specific files. You can work around this by either using the terminal (my preferred method) or by using the Cmd+Shft+G in Finder.

Once you locate the file containing the browser's history, copy it to make a backup just in case we screw up.

一、总结

1.1 总体过程

1.2 SQLContext 里面包含了 parser、analyzer、optimer。其中 analyzer 和 optimzer 都是包含了一些规则，用来对查询计划树进行转换，实现上主要是利用 pattern matching 做转换。其中这些规则按照作用的次数（Once 或者 FixedPoint）进行了分组，详细情况见第 1.4 条。

https://www.g2crowd.com/categories/business-intelligence/compare

	from inspect import isgenerator
	import re
	import copy


	class Dict(dict):

	"""
	Dict is a subclass of dict, which allows you to get AND SET(!!)
	items in the dict using the attribute syntax!

	#include <lua.h>
	#include <lauxlib.h>
	#include <lualib.h>
	#include <stdlib.h>

	int map_create(lua_State *lua);
	int map_slice(lua_State *lua);

	int main(int argc, char **argv){
	lua_State *lua = lua_open();

	#include <stdio.h>
	#include <string.h>

	#define METRIC_BUFSIZ 8192

	int
	clean_metric(char metric, char allowed_chars) {
	char cleaned_metric[METRIC_BUFSIZ];
	char p, q, *lastnl;
	char *firstspace = NULL;

	BREW_HOME=$HOME/.homebrew

	$ brew install zookeeper
	$ C_INCLUDE_PATH=${BREW_HOME}/Cellar/zookeeper/3.3.3/include/c-client-src/ pip install zkpython