问题标签 [argument-unpacking]
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javascript - What would be the best way to handle language files in NodeJS
I am currently working on a website and I want to implement a language file. Meaning, I want to be able to have a file called language.js, which contains an object of all code-generated strings.
An example:
I am unsure how I would be able to achieve this in a fast but functional way. I was planning to use util.format, but this takes every replacement as a single argument, rather than a table or array. In Lua, there is unpack()
(Source), which unpacks a table into separate elements. I'm wondering if there is a similar function in JavaScript, or if there are better ways of handling the formatting of an unknown amount of variables to a string
arrays - Matlab 箱线图句柄/属性值
我正在尝试访问用于创建boxplot()
.
我创建了一个情节:
找到异常值的句柄:
获取异常值的数据:
问题是它返回这个:
因为有些地块有多个异常值。如何解压 1x2 双精度值?
python - 按列解压缩 NumPy 数组
如果我有一个 NumPy 数组,例如 5x3,有没有办法一次将其逐列解包以传递给函数,而不是像这样:my_func(arr[:, 0], arr[:, 1], arr[:, 2])
?
有点像*args
列表解包但按列。
python - 按名称动态传递参数到函数
是否可以动态设置传递给函数的参数的名称?
像这样:
python - 在字典的for循环中解包多个变量
有人可以告诉我为什么我在下面的代码中遇到解包错误吗?
python - 带星号参数和不带星号参数的差异调用函数
我知道星号在 Python 中的函数定义中是什么意思。
不过,我经常看到带有以下参数的函数调用的星号:
第一个和第二个函数调用有什么区别?
c++ - 在 C++ 中解压缩参数包
我有两个功能f
和g
. f
异步计算它的返回值并返回一个未来。现在,基于 的几个返回值f
,我想调用g
,但我想确保 的值的计算f
并行发生。
考虑以下代码:
如何从函数的可变参数模板T
中解压缩类型call_wrapper
?
python - 为 map() 的参数解包嵌套列表
我敢肯定有办法做到这一点,但我一直无法找到它。说我有:
那么我如何使用map(add, foo)
它使其通过num1=1
,num2=2
对于第一次迭代,即它通过add(1, 2)
,然后add(3, 4)
对于第二次,等等?
- 尝试
map(add, foo)
显然是add([1, 2], #nothing)
第一次迭代 - 尝试
map(add, *foo)
第add(1, 3, 5)
一次迭代
我想在第一次迭代map(add, foo)
中做一些事情。add(1, 2)
预期输出:[3, 7, 11]
python - 如果变量不为空,则将参数解包到函数
如果变量不为空,我正在尝试将参数列表传递给函数。
这是变量:
但是这个变量有时可能是 None :
如果它不为空,我想从 shape_properties 中提取论点。这是我尝试过的:
我收到此错误:
错误代码向我暗示我不能在这种情况下使用 **args?
这是 add_textbox() 的样子:
python - Python: Splat/unpack operator * in python cannot be used in an expression?
Does anybody know the reasoning as to why the unary (*
) operator cannot be used in an expression involving iterators/lists/tuples?
Why is it only limited to function unpacking? or am I wrong in thinking that?
For example:
Why doesn't the *
operator:
whereas when the *
operator is used with a function call it does expand:
There is a similarity between the +
and the *
when using lists but not when extending a list with another type.
For example: