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# Associative Arrays

declare -A characters
AA="abcdabcaba"
for ((x=0; x<${#AA}; x++))
do
    tmp=${AA:$x:1}
    ((characters[$tmp]++))
done

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function httpdate2unixtimestamp(date,    array, time_string, timestamp) {
    # input: [02/Dec/2011:04:02:42 -0500]
    # output: 1322816562
    # date is argument
    # array, time_string, timestamp is local variable
    split(date, array, "[]/: []")
    if (array[3]=="Jan") month="01"
    else if (array[3]=="Feb") month="02"
    else if (array[3]=="Mar") month="03"
    else if (array[3]=="Apr") month="04"

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# Recipe 6.18. Automatically Initializing Instance Variables from _ _init_ _ Arguments

# Solution
# You can "factor out" the attribute-assignment task to an auxiliary function:
def set_attributes_from_dict(d):
    self = d.pop('self')
    for n, v in d.iteritems():
        setattr(self, n, v)

# Now, the typical boilerplate code for an _ _init_ _ method such as:

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Save MySQL query results into a text or CSV file

Given a query such as

SELECT order_id,product_name,qty FROM orders

which returns three columns of data, the results can be placed into the file /tmo/orders.txt using the query:

SELECT order_id,product_name,qty FROM orders

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graphite_index = json.loads(open('index.json').read())

result = json.dumps(instances, sort_keys=True, indent=4, encoding='utf-8')

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#!/bin/bash

app_path="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
app_name="$(basename "${BASH_SOURCE[0]}")"
pid_file="${app_path}/run.pid"
VERSION="${app_name} ver. 0.9.0"

function help () {
  cat <<EOF
usage: ${app_name} [-h] [-v]

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utime(){ date -d @$1; }
utime(){ date -d "1970-01-01 GMT $1 seconds"; }
utime(){ awk -v d=$1 'BEGIN{print strftime("%a %b %d %H:%M:%S %Y", d)}'; }
utime(){ perl -e "print localtime($1).\"\n\""; }
utime(){ python -c "import time; print(time.strftime('%a %b %d %H:%M:%S %Y', time.localtime($1)))"; }
 
[root@test test]# utime(){ date -d @$1; }
[root@test test]# utime 1273817956
Fri May 14 14:19:16 CST 2010
 

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{
  "title": "Templated Graphs",
  "services": {
    "filter": {
      "list": [
        {
          "type": "filter",
          "name": "host",
          "query": "sensu.*",
          "includeAll": true,

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Setup Docker on OSX

Install Homebrew on your laptop

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Install some packages you like

brew update

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{
  "id": 3,
  "title": "cAdvisor Templated",
  "originalTitle": "cAdvisor Templated",
  "tags": [],
  "style": "dark",
  "timezone": "browser",
  "editable": true,
  "hideControls": false,
  "sharedCrosshair": false,