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为AppInventor2开发自己的拓展(Extension) - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
来源中文网文档：https://www.fun123.cn/reference/extensions/aix_dev.html
为什么需要开发拓展？App Inventor 2 是积木式在线安卓开发环境，利用拖拽式的方式实现代码块堆叠，从而完成相应的逻辑。上手很容易，但是由于代码块提供的功能...
Is it worth using Python's re.compile?
...
dF.dF.
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5
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Python equivalent for PHP's implode?
...t;?php declare(strict_types=1);var_dump(implode("glue",["startString",(int)123,"endString"])); gives you string(31) "startStringglue123glueendString" but in python doing "glue".join(["startString",123,"endString"]); gives you TypeError: sequence item 1: expected str instance, int found
...
How to output something in PowerShell
...int as one could easily be led to believe.
function test {
Write-Host 123
echo 456 # AKA 'Write-Output'
return 789
}
$x = test
Write-Host "x of type '$($x.GetType().name)' = $x"
Write-Host "`$x[0] = $($x[0])"
Write-Host "`$x[1] = $($x[1])"
Terminal output of the above:
123
x of ty...
Can an html element have multiple ids?
...answered Apr 16 '11 at 7:53
user123444555621user123444555621
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...
Alphabet range in Python
... 'y', 'z']
And to do it with range
>>> list(map(chr, range(97, 123))) #or list(map(chr, range(ord('a'), ord('z')+1)))
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
Other helpful string module features:...
What is the difference between self::$bar and static::$bar in PHP?
...which may not be what you intend:
class Foo
{
protected static $bar = 1234;
}
class Bar extends Foo
{
protected static $bar = 4321;
}
When you call a method via static, you're invoking a feature called late static bindings (introduced in PHP 5.3).
In the above scenario, using self will ...
Output first 100 characters in a string
...o handle this. Here are some examples.
The formatting code '%s' converts '12345' to a string, but it's already a string.
>>> '%s' % '12345'
'12345'
'%.3s' specifies to use only the first three characters.
>>> '%.3s' % '12345'
'123'
'%.7s' says to use the first seven charac...
Capturing TAB key in text box [closed]
...swered Sep 9 '10 at 6:14
chintan123chintan123
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...
PadLeft function in T-SQL
...as the number gets bigger it should ALWAYS work.... regardless if its 1 or 123456789...
So if your max value is 123456... you would see 0000123456 and if your min value is 1 you would see 0000000001
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