通过CMake 教程:
??? CMakeLists.txt
??? src
? ??? main.cpp
??? templates
??? fooConf.h.in
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cmake_minimum_required(VERSION 3.2)
project(foo)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(PROJECT_SOURCE_DIR src)
set(PROJECT_TEMPLATE_DIR templates)
set(SOURCE_FILES ${PROJECT_SOURCE_DIR}/main.cpp)
set(${PROJECT_NAME}_MAJOR 0)
set(${PROJECT_NAME}_MINOR 1)
set(${PROJECT_NAME}_MICRO 1)
configure_file (
"${PROJECT_TEMPLATE_DIR}/fooConf.h.in"
"${PROJECT_SOURCE_DIR}/fooConf.h"
)
add_executable(foo ${SOURCE_FILES})
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#define @PROJECT_NAME@_VERSION_MAJOR @PROJECT_NAME@@_VERSION_MAJOR@
#define @PROJECT_NAME@_VERSION_MINOR @PROJECT_NAME@@_VERSION_MINOR@
#define @PROJECT_NAME@_VERSION_MICRO @PROJECT_NAME@@_VERSION_MICRO@
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#include <iostream>
#include "src/fooConf.h"
// Also tried: "fooConf.h"
int main() {
std::cout << foo_VERSION_MAJOR;
return 0;
}
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fatal error: src/fooConf.h: No such file or directory
Run Code Online (Sandbox Code Playgroud) 我一直在学习Ruby中的元编程,并且发现它非常有用.我确信我可以在Python中做同样的事情.
例如:如何使用元编程以简洁和通用的方式重写此函数?
def foo(bar=None, baz=None, qux=None, haz=None):
txt = {}
if bar:
txt.update({'bar': bar})
if baz:
txt.update({'baz': baz})
if qux:
txt.update({'qux': qux})
if haz:
txt.update({'haz': haz})
return txt
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(这显然过于简化,实际上可能会根据各个键的值设置执行不同的任务)
python conditional dictionary exception-handling metaprogramming
如何stdin在Scala中继续阅读直到到达“ END”字符串?
这是我尝试过的:
val text = Iterator.continually(Console.readLine).takeWhile(_ != "END").toString
Run Code Online (Sandbox Code Playgroud) 将其显示为 JSON 的最佳方式是什么?
{'foo': 'bar'}
[1,2,3,4,5]
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我的部分解决方案:
import json
def json_tuple(*args, **kwargs):
if args:
if kwargs:
return json.dumps(args), json.dumps(kwargs)
return json.dumps(args)
return json.dumps(kwargs)
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提供:
>>> json_tuple(1,2,3,4,5, **{'foo': 'bar'})
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('[1, 2, 3, 4, 5]', '{"foo": "bar"}')
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将args列表放入kwargs——例如:在args钥匙下——是唯一的解决方案吗?
<div fxLayout="row wrap" fxLayout.xs="column" fxLayoutAlign="space-around center" fxLayoutGap="10px">
<mat-card *ngFor="let o of cards">
<mat-card-header>
<div mat-card-avatar class="example-header-image"></div>
<mat-card-title>{{o.title}}</mat-card-title>
<mat-card-subtitle>{{o.subtitle}}</mat-card-subtitle>
</mat-card-header>
<img mat-card-image [src]="o.url" alt="Photo of {{o.title}}">
<mat-card-content>
<p>
{{o.content}}
</p>
</mat-card-content>
</mat-card>
</div>
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在cards组件上的哪里定义为:
// const url = 'https://material.angular.io/assets/img/examples/shiba2.jpg';
cards: {title: string, subtitle: string, content: string, url: string}[] = [
{ title: 'Title', subtitle: 'Subtitle', content: 'Content here', url },
{ title: 'Title', subtitle: 'Subtitle', content: 'Content here', url },
{ title: 'Title', subtitle: 'Subtitle', content: 'Content …Run Code Online (Sandbox Code Playgroud) python ×3
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