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StringUtils 字符串工具扩展：强大的文本处理工具集 · App Inventor 2 中文网
...本填充
// 左填充到10位
设置 StringUtils1.Text 为 "123"
设置 Label1.Text 为 调用 StringUtils1.LeftPad(10, "0")
// 结果: "0000000123"
// 居中对齐
设置 StringUtils1.Text 为 "Hi"
设置 Label2.Text 为 调用 StringUtils1.Center(10, "*")
// 结果: "****Hi****"
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How to show git log history for a sub directory of a git repo?
...anges for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 Initial Commit
# Show all changes (one additional commit besides in src/nvfs).
$ git log --oneline
d6f6b3b Changes for Mac OS X
96cbb79 gitignore
803fcc3 Initial Commit
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What's the best way to check if a file exists in C?
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POSIX is an ISO standard; it defines access(). C is another ISO standard; it does not.
– Jonathan Leffler
Oct 24 '08 at 7:23
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An efficient way to transpose a file in Bash
...real 0m0.390s
user 0m0.370s
sys 0m0.010s
EDIT by Ed Morton (@ghostdog74 feel free to delete if you disapprove).
Maybe this version with some more explicit variable names will help answer some of the questions below and generally clarify what the script is doing. It also uses tabs as the...
Reorder levels of a factor without changing order of values
... relevant difference between the datasets.
– CoderGuy123
Dec 27 '15 at 21:49
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How to do constructor chaining in C#
... {
}
}
then:
Foo a = new Foo(), b = new Foo(456,"def"), c = new Foo(123), d = new Foo("abc");
Note also:
you can chain to constructors on the base-type using base(...)
you can put extra code into each constructor
the default (if you don't specify anything) is base()
For "why?":
code r...
HTML colspan in CSS
...>
<div class="item-c">3</div>
<div class="item-d">123</div>
</div>
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Loop through all nested dictionary values?
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@Seanny123, Thanks for drawing my attention to this. Python 3 changes the picture in a couple of ways, in fact -- I'm going to rewrite this as a version that uses the new yield from syntax.
– senderle
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Clearing intent
... after that just press home then open the activity again from History). I posted the solution I'm using below. If you could comment on this would be nice.
– tato.rodrigo
Aug 27 '14 at 20:20
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What is the correct way of using C++11's range-based for?
...t() const
{
return m_data;
}
private:
int m_data;
};
ostream& operator<<(ostream& os, const X& x)
{
os << x.Get();
return os;
}
If we use the above for (auto x : v) {...} syntax with this new class:
vector<X> v = {1, 3, 5, 7, 9};
cout &...