Functions that allow you to call a function not more than once in a given timeframe.
This can be illustrated with timing diagrams. In the following diagrams, f
designates call to the throttled function, t
is the period where the timer is running, and x
shows you the actual execution point of the throttled function.
f 1 2 3 4 5 6
t -------- --------
x 1-- 4--
In this case, the function f
was called 6 times. f
's timer t
was started on the first invocation of f, and stopped shortly after the third invocation, taking 8 'ticks'.
During this run of the timer, the function f
was ex
ecuted only once –– at the beginning (leading edge) --, taking 3 ticks to execute.
This is then repeated for function invocations 4 through 6.
You can use the test_defer()
function from this module to show you an example that corresponds to the timing diagrams.
Its invocation and output will look something like this:
:lua require'defer'.test_defer('tl')
" tl: 1
" 1
" 2
" 3
" tl: 4
" 4
" 5
" 6
Using the arguments of the first function call while the timer was running (the default).
f 1 2 3 4 5 6
t -------- --------
x 1-- 4--
:lua require'defer'.test_defer('tt')`
" 1
" 2
" 3
" tt: 1
" 4
" 5
" 6
" tt: 4
Using the arguments of the last call while the timer was running:
f 1 2 3 4 5 6
t -------- --------
x 3-- 6--
:lua require'defer'.test_defer('tt', true)`
" 1
" 2
" 3
" tt: 3
" 4
" 5
" 6
" tt: 6
On each function call, the timer is reset (indicated by an r
):
f 1 2 3 4 5 6
t ---r--r--r--r--r-------
x 1--
:lua require'defer'.test_defer('dl')
" dl: 1
" 1
" 2
" 3
" 4
" 5
" 6
Using the arguments of the last function call while the timer was running (the default).
f 1 2 3 4 5 6
t ---r--r--r--r--r-------
x 6--
:lua require'defer'.test_defer('dt')
" 1
" 2
" 3
" 4
" 5
" 6
" (pause, press <cr>)
" dt: 6
Using the arguments of the first function call while the timer was running.
f 1 2 3 4 5 6
t ---r--r--r--r--r-------
x 1--
:lua require'defer'.test_defer('dt', true)
" 1
" 2
" 3
" 4
" 5
" 6
" (pause, press <cr>)
" dt: 1
Hello thanks for publishing this.
What's the license for this code? MIT?