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" list.vim
" @Author: Tom Link (micathom AT gmail com?subject=[vim])
" @Website: http://www.vim.org/account/profile.php?user_id=4037
" @License: GPL (see http://www.gnu.org/licenses/gpl.txt)
" @Created: 2007-06-30.
" @Last Change: 2016-03-22.
" @Revision: 68
""" List related functions {{{1
" For the following functions please see ../../test/tlib.vim for examples.
" :def: function! tlib#list#Inject(list, initial_value, funcref)
" EXAMPLES: >
" echo tlib#list#Inject([1,2,3], 0, function('Add')
" => 6
function! tlib#list#Inject(list, value, Function) "{{{3
if empty(a:list)
return a:value
else
let item = a:list[0]
let rest = a:list[1:-1]
let value = call(a:Function, [a:value, item])
return tlib#list#Inject(rest, value, a:Function)
endif
endf
" EXAMPLES: >
" tlib#list#Compact([0,1,2,3,[], {}, ""])
" => [1,2,3]
function! tlib#list#Compact(list) "{{{3
return filter(copy(a:list), '!empty(v:val)')
endf
" EXAMPLES: >
" tlib#list#Flatten([0,[1,2,[3,""]]])
" => [0,1,2,3,""]
function! tlib#list#Flatten(list) "{{{3
let acc = []
for e in a:list
if type(e) == 3
let acc += tlib#list#Flatten(e)
else
call add(acc, e)
endif
unlet e
endfor
return acc
endf
" :def: function! tlib#list#FindAll(list, filter, ?process_expr="")
" Basically the same as filter()
"
" EXAMPLES: >
" tlib#list#FindAll([1,2,3], 'v:val >= 2')
" => [2, 3]
function! tlib#list#FindAll(list, filter, ...) "{{{3
let rv = filter(copy(a:list), a:filter)
if a:0 >= 1 && a:1 != ''
let rv = map(rv, a:1)
endif
return rv
endf
" :def: function! tlib#list#Find(list, filter, ?default="", ?process_expr="")
"
" EXAMPLES: >
" tlib#list#Find([1,2,3], 'v:val >= 2')
" => 2
function! tlib#list#Find(list, filter, ...) "{{{3
let default = a:0 >= 1 ? a:1 : ''
let expr = a:0 >= 2 ? a:2 : ''
return get(tlib#list#FindAll(a:list, a:filter, expr), 0, default)
endf
" EXAMPLES: >
" tlib#list#Any([1,2,3], 'v:val >= 2')
" => 1
function! tlib#list#Any(list, expr) "{{{3
return !empty(tlib#list#FindAll(a:list, a:expr))
endf
" EXAMPLES: >
" tlib#list#All([1,2,3], 'v:val >= 2')
" => 0
function! tlib#list#All(list, expr) "{{{3
return len(tlib#list#FindAll(a:list, a:expr)) == len(a:list)
endf
" EXAMPLES: >
" tlib#list#Remove([1,2,1,2], 2)
" => [1,1,2]
function! tlib#list#Remove(list, element) "{{{3
let idx = index(a:list, a:element)
if idx != -1
call remove(a:list, idx)
endif
return a:list
endf
" EXAMPLES: >
" tlib#list#RemoveAll([1,2,1,2], 2)
" => [1,1]
function! tlib#list#RemoveAll(list, element) "{{{3
call filter(a:list, 'v:val != a:element')
return a:list
endf
" :def: function! tlib#list#Zip(lists, ?default='')
" EXAMPLES: >
" tlib#list#Zip([[1,2,3], [4,5,6]])
" => [[1,4], [2,5], [3,6]]
function! tlib#list#Zip(lists, ...) "{{{3
TVarArg 'default'
let lists = copy(a:lists)
let max = 0
for l in lists
let ll = len(l)
if ll > max
let max = ll
endif
endfor
" TLogVAR default, max
return map(range(0, max - 1), 's:GetNthElement(v:val, lists, default)')
endf
function! s:GetNthElement(n, lists, default) "{{{3
" TLogVAR a:n, a:lists, a:default
return map(copy(a:lists), 'get(v:val, a:n, a:default)')
endf
function! tlib#list#Uniq(list, ...) "{{{3
" TLogVAR a:list
TVarArg ['get_value', ''], ['remove_empty', 0]
if remove_empty
call filter(a:list, 'type(v:val) == 0 || !empty(v:val)')
endif
" CREDITS: Based on syntastic#util#unique(list) by scrooloose
let emptystring = 0
let seen = {}
let uniques = []
if empty(get_value)
for e in a:list
if e == ''
if !emptystring
let emptystring = 1
call add(uniques, e)
endif
elseif !has_key(seen, e)
let seen[e] = 1
call add(uniques, e)
endif
unlet e
endfor
else
for e in a:list
let v = eval(printf(get_value, string(e)))
if v == ''
if !emptystring
let emptystring = 1
call add(uniques, v)
endif
elseif !has_key(seen, v)
let seen[v] = 1
call add(uniques, v)
endif
unlet e v
endfor
endif
return uniques
endf
function! tlib#list#ToDictionary(list, default, ...) "{{{3
TVarArg ['generator', '']
let dict = {}
for item in a:list
if !empty(item)
let dict[item] = empty(generator) ? a:default : call(generator, [item, a:default])
endif
endfor
return dict
endf
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