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What is the difference between JSON and Object Literal Notation?
...ther syntax).
The values can be any valid JavaScript expression, including function definitions and undefined.
Duplicate keys produce defined, specified results (in loose mode, the latter definition replaces the former; in strict mode, it's an error).
Knowing that, just by looking at the syntax,...
Convert JavaScript string in dot notation into an object reference
...,'etc']) #works with both strings and lists
5
> index(obj,'a.b.etc', 123) #setter-mode - third argument (possibly poor form)
123
> index(obj,'a.b.etc')
123
...though personally I'd recommend making a separate function setIndex(...). I would like to end on a side-note that the original...
Blocks and yields in Ruby
... gift from foo!") if block_given?
end
foo(10)
# OK: called as foo(10)
foo(123) {|y| puts "BLOCK: #{y} How nice =)"}
# OK: called as foo(123)
# BLOCK: A gift from foo! How nice =)
Or, using the special block argument syntax:
def bar(x, &block)
puts "OK: called as bar(#{x.inspect})"
block....
What is the benefit of zerofill in MySQL?
... y INT(8) NOT NULL);
INSERT INTO yourtable (x,y) VALUES
(1, 1),
(12, 12),
(123, 123),
(123456789, 123456789);
SELECT x, y FROM yourtable;
Result:
x y
00000001 1
00000012 12
00000123 123
123456789 123456789
...
partial string formatting
...n't 100% control. Imagine: "{foo} {{bar}}".format(foo="{bar}").format(bar="123") from the other examples. I would expect "{bar} 123" but they output "123 123".
– Benjamin Manns
Sep 21 '18 at 13:53
...
Checking if an Android application is running in the background
...tained, and it works throughout your whole application. Plus, there are no funky permissions required either.
MyLifecycleHandler.java:
public class MyLifecycleHandler implements ActivityLifecycleCallbacks {
// I use four separate variables here. You can, of course, just use two and
// incr...
让 App 不休眠：屏幕常亮与熄屏后继续运行 · App Inventor 2 中文网
...运行
用 KeepAwake 保持唤醒拓展（下载页里有 .aix，导入即可）。
这个实验必须编译成 APK 安装后测试：拓展要启动前台服务，服务得写进安装包的清单文件，AI 伴侣里没有，在伴侣里点了不会有效果。
它申请一个部分...
An operation on a socket could not be performed because the system lac...
...重复使用。
参考：https://support.microsoft.com/zh-cn/help/196271/when-you-try-to-connect-from-tcp-ports-greater-than-5000-you-receive-t
How to get the browser language using JavaScript [duplicate]
...turns an array of language preference: navigator.languages //["en-US", "zh-CN", "ja-JP"] This should work on at least 95% of browsers in 2020.
– Cornelius Roemer
Mar 9 at 13:13
...
An operation on a socket could not be performed because the system lac...
...重复使用。
参考：https://support.microsoft.com/zh-cn/help/196271/when-you-try-to-connect-from-tcp-ports-greater-than-5000-you-receive-t