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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...层做得好不好，直接决定整个BLE芯片的功耗，灵敏度以及selectivity等射频指标。Link Layer，简称：LL，链路层。LL层是整个BLE协议栈的核心，也是BLE协议栈的难点和重点。像Nordic的BLE协议栈能同时支持20个link（连接），就是LL层的功...
Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
...est choice. I suppose the main point is that the HTML element shouldn't be selected based on its default presentation appearance, but rather its significance to the structure of the document.
– crush
Sep 3 '14 at 13:08
...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
... table view cell is tapped
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped cell number \(indexPath.row).")
}
}
Important Note:
It is the following two lines of code (along with auto layout) that make the variable cell height possi...
How to align checkboxes and their labels consistently cross-browsers
... various label font sizes, big and small. Now, for fixing IE's baseline on selects and inputs...
Update: (Third-Party Edit)
The proper bottom position depends on font-family and font-size! I found using bottom: .08em; for checkbox & radio elements is a good general value. I tested it in Chro...
Android: textColor of disabled button in selector not showing?
I am trying to make a button with a selector my button can have the following states:
5 Answers
...
What encoding/code page is cmd.exe using?
... code page for instance, but I do not know since when these code pages are selectable. (It is under Win7.)
– Adam L. S.
Dec 26 '14 at 14:08
...
What does .SD stand for in data.table in R
...iping can be beautiful
library(Lahman)
Teams = as.data.table(Teams)
# *I'm selectively suppressing the printed output of tables here*
Teams
Pitching = as.data.table(Pitching)
# subset for conciseness
Pitching = Pitching[ , .(playerID, yearID, teamID, W, L, G, ERA)]
Pitching
Naked .SD
To illustrat...
How to add texture to fill colors in ggplot2
... draw textured rectangles and bars with ggplot2.
# Image/pattern randomly selected from README
path_image <- "http://www.hypergridbusiness.com/wp-content/uploads/2012/12/rocks2-256.jpg"
library(ggplot2)
# devtools::install_github("clauswilke/ggtextures")
ggplot(mtcars, aes(cyl, mpg)) +
ggtex...
Set markers for individual points on a line in Matplotlib
...rve which happens to have markers. So you are expected to have to manually select the points. This subject is interesting and goes deeper, will comment more in a future post, after releasing relevant code.
– Ioannis Filippidis
Nov 25 '13 at 7:41
...
How do I Sort a Multidimensional Array in PHP [duplicate]
...'s associative if you want: this code takes care of sorting items, but you select the actual sort function (usort or uasort).
Finally, it does not use array_multisort: while array_multisort is convenient, it depends on creating a projection of all your input data before sorting. This consumes time a...