大约有 39,000 项符合查询结果（耗时：0.0245秒） [XML]
任何组件块 · App Inventor 2 中文网
...念是“不要重复自己”（或 DRY）。与其制作大量重复代码，例如通过复制和粘贴，不如使用称为“任何组件”块的特殊块。
“任何组件”块到底是什么？
每一个组件块，比如设置 按钮1.文本 为，都包含三个部分：
（1）被改...
App Inventor 2 代码调试方式：App调试、问题排查方法 · App Inventor 2 中文网
... App Inventor 2 代码调试方式：App调试、问题排查方法
App Inventor 2 调试方式
“标签”调试法
”预览代码块“调试功能
adb 调试：万能利器，...
Join strings with a delimiter only if strings are not null or empty
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Consider
var address = "foo";
var city;
var state = "bar";
var zip;
text = [address, city, state, zip].filter(Boolean).join(", ");
console.log(text)
.filter(Boolean) (which is the same as .filter(x => x)) removes all "falsy" values (nulls, undefineds, empty strings etc). If...
Sorting list based on values from another list?
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Shortest Code
[x for _,x in sorted(zip(Y,X))]
Example:
X = ["a", "b", "c", "d", "e", "f", "g", "h", "i"]
Y = [ 0, 1, 1, 0, 1, 2, 2, 0, 1]
Z = [x for _,x in sorted(zip(Y,X))]
print(Z) # ["a", "d", "h", "b", "c", "e", "i", "f", "g"]
Gen...
Reverse engineering from an APK file to a project
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@sri just rename the apk file to zip and extract it, you will have the resource files in res folder
– Hoang Huynh
Nov 5 '13 at 3:58
8
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regex for zip-code
I need Regex which can satisfy all my three condtions for zip-code. E.g-
3 Answers
3...
I didn't find “ZipFile” class in the “System.IO.Compression” namespace
I can't use "Zipfile" class in the name space "System.IO.Compression" my code is :
10 Answers
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App Inventor 2 列表的函数式编程 · App Inventor 2 中文网
...据和副作用。
函数式编程中的许多运算符通常用于使代码更简洁、更简单。
本教程演示了功能运算符块的用法：过滤器、映射、缩减和排序。
第 1 部分：贝瑞的柠檬水摊
贝瑞正在通过设立一个柠檬水摊来筹款，每瓶柠檬...
Unpacking a list / tuple of pairs into two lists / tuples [duplicate]
...list = ('1','a'),('2','b'),('3','c'),('4','d')
>>> list1, list2 = zip(*source_list)
>>> list1
('1', '2', '3', '4')
>>> list2
('a', 'b', 'c', 'd')
Edit: Note that zip(*iterable) is its own inverse:
>>> list(source_list) == zip(*zip(*source_list))
True
When unp...
What is the difference between tar and zip? [closed]
What is the difference between tar and zip? What are the use cases for each?
1 Answer
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