Jacob Quinn quinnj
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| reload("/Users/jacobquinn/julia/base/mmap2.jl") | |
| function seg(n) | |
| file = tempname() | |
| s = open(file, "w") do f | |
| write(f, "Hello World\n") | |
| end | |
| for i = 1:n | |
| m = Mmap2.Array(file) | |
| m[1] |
quinnj
/ juliacon2015.jl
Last active
August 29, 2015 14:23
Managing Data in Julia: Old Tricks, New Tricks Code
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| Pkg.clone("https://github.com/quinnj/Mmap.jl") | |
| Pkg.clone("https://github.com/quinnj/CSV.jl") | |
| Pkg.add("ODBC") | |
| Pkg.checkout("SQLite","jq/remodel") | |
| Pkg.add("SQLite") | |
| Pkg.checkout("SQLite","jq/updates") | |
| reload("Mmap") | |
| reload("CSV") |
quinnj
/ gist:bb1b5d8170301801c012
Last active
August 29, 2015 14:24
Base String Performance Benchmarks
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| ### Micro performance benchmarks | |
| # Results Data | |
| ## String Type | Benchmark | DateTime Run | | |
| ## Julia Version | Strings.jl Version | | |
| ## Time Elapsed | Bytes Allocated | GC Time | |
| # reload("Strings") | |
| results = Dict("String Type"=>ASCIIString[], | |
| "String Length"=>Int[], |
quinnj
/ gist:38ec81c770bed6291391
Created
October 15, 2015 22:09
Potential Julia tabular data structure
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| type Table{T} <: Source | |
| schema::Schema | |
| index::Vector{Int} | |
| ints::Vector{NullableVector{Int}} | |
| floats::Vector{NullableVector{Float64}} | |
| ptrstrings::Vector{NullableVector{PointerString}} | |
| strings::Vector{NullableVector{UTF8String}} | |
| dates::Vector{NullableVector{Date}} | |
| datetimes::Vector{NullableVector{DateTime}} | |
| any::Vector{NullableVector{Any}} |
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| julia> function f(v::Vector{Int8}, n) | |
| s = Int8(0) | |
| @inbounds for i = 1:n | |
| s += v[i] | |
| end | |
| return s | |
| end | |
| f (generic function with 2 methods) | |
| julia> function f(v::Vector{Union{Void, Int8}}, n) |
quinnj
/ selector bytes.jl
Created
August 15, 2017 19:12
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| """ | |
| Base.selectorbytes(A::Array{T, N}) -> Array{UInt8, N} | |
| For an Array with `isbits` Union elements, return the "selector bytes" that indicate the | |
| index of the type for each array element, i.e. the type of `A[1]` is | |
| `Base.uniontypes(eltype(A))[Base.selectorbytes(A)[1] + 1]`. | |
| **NOTE**: The actual array selector bytes are returned, meaning if individual elements | |
| are modified, the original array will reflect those changes. Setting selector bytes to | |
| invalid or out-of-bounds type indexes may corrupt the original array. | |
| """ |
quinnj
/ gist:3ab5f31305d5f76056e2e7b79b2b58c3
Created
October 10, 2017 03:16
Pure julia float parsing
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| const EXPONENTS = [ | |
| 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, | |
| 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19, | |
| 1e20, 1e21, 1e22, 1e23, 1e24, 1e25, 1e26, 1e27, 1e28, 1e29, | |
| 1e30, 1e31, 1e32, 1e33, 1e34, 1e35, 1e36, 1e37, 1e38, 1e39, | |
| 1e40, 1e41, 1e42, 1e43, 1e44, 1e45, 1e46, 1e47, 1e48, 1e49, | |
| 1e50, 1e51, 1e52, 1e53, 1e54, 1e55, 1e56, 1e57, 1e58, 1e59, | |
| 1e60, 1e61, 1e62, 1e63, 1e64, 1e65, 1e66, 1e67, 1e68, 1e69, | |
| 1e70, 1e71, 1e72, 1e73, 1e74, 1e75, 1e76, 1e77, 1e78, 1e79, | |
| 1e80, 1e81, 1e82, 1e83, 1e84, 1e85, 1e86, 1e87, 1e88, 1e89, |
quinnj
/ gist:df388d2946503593c2124f9de1039a95
Created
February 25, 2018 01:15
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| const BYTES = fill(false, 128) | |
| BYTES[Int(',')] = true | |
| BYTES[Int('\n')] = true | |
| BYTES[Int('\r')] = true | |
| const COMMA = UInt8(',') | |
| const NEWLINE = UInt8('\n') | |
| const RETURN = UInt8('\r') |
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| call plug#begin('~/.config/nvim/plugged') | |
| Plug 'morhetz/gruvbox' | |
| Plug 'vim-airline/vim-airline' | |
| Plug 'vim-airline/vim-airline-themes' | |
| Plug 'JuliaEditorSupport/julia-vim' | |
| Plug 'cespare/vim-toml' | |
| Plug 'tpope/vim-fugitive' | |
| Plug 'ararslan/license-to-vim' | |
| call plug#end() |
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| FROM debian:stretch-slim | |
| # Create the home directory for the new user. | |
| RUN mkdir -p /home/default | |
| # Create an default user so our program doesn't run as root. | |
| RUN groupadd -r default &&\ | |
| useradd -r -g default -d /home/default -s /sbin/nologin -c "Docker image user" default | |
| # Set the home directory to our default user's home. | |
| ENV HOME=/home/default |