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App Inventor 2 SideBarV2 侧边栏拓展 · App Inventor 2 中文网
...建应用侧边栏
在屏幕中准备一个用于打开菜单的按钮、一个内容布局和侧边栏图标列表。调用 Create 创建菜单，再用 Show 和 Hide 控制显示：
when Screen1.Initialize() {
SidebarV2_1.Create(
垂直布局_内容,
["首页", "消息", "...
Remove insignificant trailing zeros from a number?
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143
If you convert it to a string it will not display any trailing zeros, which aren't stored in th...
.NET String.Format() to add commas in thousands place for a number
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1249
String.Format("{0:n}", 1234); // Output: 1,234.00
String.Format("{0:n0}", 9876); // No digits ...
Using numpy to build an array of all combinations of two arrays
...implementation:
@pv's solution
In [113]:
%timeit cartesian(([1, 2, 3], [4, 5], [6, 7]))
10000 loops, best of 3: 135 µs per loop
In [114]:
cartesian(([1, 2, 3], [4, 5], [6, 7]))
Out[114]:
array([[1, 4, 6],
[1, 4, 7],
[1, 5, 6],
[1, 5, 7],
[2, 4, 6],
[2, 4, 7],...
JavaScript string newline character?
...8 and Opera 9 on Windows use \r\n. All the other browsers I tested (Safari 4 and Firefox 3.5 on Windows, and Firefox 3.0 on Linux) use \n. They can all handle \n just fine when setting the value, though IE and Opera will convert that back to \r\n again internally. There's a SitePoint article with so...
How to display line numbers in 'less' (GNU)
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Luke Peterson
7,30988 gold badges4040 silver badges4444 bronze badges
answered May 6 '09 at 20:56
dirkgentlydirkgently
...
Minimal web server using netcat
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54
Try this:
while true ; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n $(date)"'; done
The ...
How do I break a string over multiple lines?
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1041
Using yaml folded style, each line break is replaced by a space. The indention in each line wil...
How to escape a JSON string containing newline characters using JavaScript?
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140
Take your JSON and .stringify() it. Then use the .replace() method and replace all occurrences ...
How do I get the first n characters of a string without checking the size or going out of bounds?
... |
edited Apr 11 '18 at 3:47
answered Oct 18 '09 at 4:00
St...