- You can store a price in a floating point variable.
- All currencies are subdivided in 1/100th units (like US dollar/cents, euro/eurocents etc.).
- All currencies are subdivided in decimal units (like dinar/fils)
- All currencies currently in circulation are subdivided in decimal units. (to exclude shillings, pennies) (counter-example: MGA)
- All currencies are subdivided. (counter-examples: KRW, COP, JPY... Or subdivisions can be deprecated.)
- Prices can't have more precision than the smaller sub-unit of the currency. (e.g. gas prices)
- For any currency you can have a price of 1. (ZWL)
- Every country has its own currency. (EUR is the best example, but also Franc CFA, etc.)
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| ;; Datomic example code | |
| ;; demonstrates various update scenarios, using a news database | |
| ;; that contains stories, users, and upvotes | |
| ;; grab an in memory database | |
| (use '[datomic.api :only (q db) :as d]) | |
| (def uri "datomic:mem://foo") | |
| (d/create-database uri) | |
| (def conn (d/connect uri)) |
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| # download latest libevent2 and tmux sources, and extract them somewhere | |
| # (thx bluejedi for tip on latest tmux URL) | |
| # | |
| # at the time of writing: | |
| # https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz | |
| # http://sourceforge.net/projects/tmux/files/latest/download?source=files | |
| # | |
| # install deps | |
| yum install gcc kernel-devel make ncurses-devel |
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| (defn entity->map [convert-data entity] | |
| (reduce (fn [m attr] | |
| (if (keyword? attr) | |
| (if-let [v (attr entity)] | |
| (assoc m attr v) | |
| m) | |
| (let [[attr conv-fn] attr] | |
| (if-let [v (attr entity)] | |
| (assoc m attr (conv-fn v)) | |
| m)))) |
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| (ns example.errors) | |
| (defn clean-address [params] | |
| "Ensure (params :address) is present" | |
| (if (empty? (params :address)) | |
| [nil "Please enter your address"] | |
| [params nil])) | |
| (defn clean-email [params] | |
| "Ensure (params :email) matches *@*.*" |
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| #!/bin/bash | |
| #title :wildfly-install.sh | |
| #description :The script to install Wildfly 10.x | |
| #more :http://sukharevd.net/wildfly-8-installation.html | |
| #author :Dmitriy Sukharev | |
| #date :2016-06-18T02:45-0700 | |
| #usage :/bin/bash wildfly-install.sh | |
| #tested-version1 :10.0.0.CR3 | |
| #tested-distros1 :Ubuntu 15.10; Debian 7,8; CentOS 7; Fedora 22 | |
| #tested-version2 :10.0.0.Final |
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| # How to configure a Clojure/Herokup app to use the New Relic add-on | |
| # for monitoring and to prevent the app from sleeping. | |
| # | |
| # by James Thornton, http://jamesthornton.com | |
| # | |
| # Here's what you need to do to get the New Relic plugin working with a | |
| # Clojure/Pedestal app on Heroku. | |
| # It took some fiddling because there are several versions of docs |
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| (ns my-todo.core | |
| (:require [io.pedestal.http :as http] | |
| [io.pedestal.http.route :refer [router]] | |
| [io.pedestal.http.route.definition :refer [defroutes]])) | |
| (defn hello-world [context] | |
| {:status 200 | |
| :body "Hello, world!" | |
| :headers {}}) |
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