我正在观看此视频使用Homebrew安装git.我已经安装了Homebrew.我遇到的问题是使用Homebrew安装git.我键入brew install git并有一些错误消息.
错误消息:
./generate-cmdlist.sh > common-cmds.h+ && mv common-cmds.h+ common-cmds.h
/usr/bin/xcrun clang -o hex.o -c -MF ./.depend/hex.o.d -MMD -MP -Os -w -pipe -march=native -Qunused-arguments -I. -DUSE_ST_TIMESPEC -DNO_GETTEXT -DHAVE_DEV_TTY -DSHA1_HEADER='<openssl/sha.h>' -DNO_MEMMEM hex.c
/usr/bin/xcrun clang -o ident.o -c -MF ./.depend/ident.o.d -MMD -MP -Os -w -pipe -march=native -Qunused-arguments -I. -DUSE_ST_TIMESPEC -DNO_GETTEXT -DHAVE_DEV_TTY -DSHA1_HEADER='<openssl/sha.h>' -DNO_MEMMEM ident.c
/usr/bin/xcrun clang -o kwset.o -c -MF ./.depend/kwset.o.d -MMD -MP -Os -w -pipe -march=native -Qunused-arguments -I. -DUSE_ST_TIMESPEC -DNO_GETTEXT -DHAVE_DEV_TTY -DSHA1_HEADER='<openssl/sha.h>' -DNO_MEMMEM kwset.c
In file included from …我想在iPhone的启动画面中添加一些背景音乐.我已经将启动画面时间增加了几秒钟..而且音乐时间不长......但我不知道该怎么做？需要一些指导......
我想在我的urls.py中添加一些网址.
urls.py
urlpatterns = patterns('',
# Examples:
# url(r'^$', 'Permissions.views.home', name='home'),
# url(r'^Permissions/', include('Permissions.foo.urls')),
#url(r'^Permissions$', include('Permissions.Authenication.urls')),
url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
url(r'^admin/', include(admin.site.urls)),
url(r'^$',RedirectView.as_view(url='/welcome/'),
)
urlpatterns += patterns('',
url(r'^register/$', 'drinker.views.DrinkerRegistration',name='DrinkerRegistration'),
url(r'^welcome/$','drinker.views.DrinkerWelcome',name='DrinkerWelcome'),
url(r'^home/(?P<userpk>[^/]+)/$','drinker.views.DrinkerHome', name='DrinkerHome'),
)
错误:
Traceback:
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
101. request.path_info)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/urlresolvers.py" in resolve
298. for pattern in self.url_patterns:
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/urlresolvers.py" in url_patterns
328. patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/urlresolvers.py" in urlconf_module
323. self._urlconf_module = import_module(self.urlconf_name)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
Exception Type: SyntaxError at /
Exception Value: invalid …我需要使用javascript和regex替换文本.使得borex,edge和rss字样替换为borex,edge和rss feed.文字看起来像这样.
<body>
<img src="http://some.web.site/image.jpg" title="borex" />
These words are highlighted: borex, edge, rss feeds while these words are not: bewedge, borexlumina, rss feedssss
</body>
替换为:
<body>
<img src="http://some.web.site/image.jpg" title="borex" />
These words are highlighted: <b>borex</b>, <b>edge</b>, <b>rss feeds</b> while these words are not: bewedge, borexlumina, rss feedssss
</body>
我试过了:
var str = document.getElementByTagName("body")
str.replace(/borex/g,'<b>borex</b>').replace(/edge/g,'<b>edge</b>').replace(/rss feeds/,'<b>rss feeds</b>')
这得到了所有这些.我如何只获得不属于另一个词的单词？欢迎任何其他建议..需要一些帮助......
例如，我会使用 cumsum 来找到最多为 5 的总和，但我想要的不是所有中间值。
例如：
A = [1:5];
B = cumsum(A)
返回
B =
1 3 6 10 15
我只想要 15 个而不是其他的。
我尝试过的：
B = cumsum(A)(end) 但它给了我这个错误：
??? Error: ()-indexing must appear last in an index expression.
class Personaje:
def__init__(self,name):
self.name=pepe
self.type=warrior
self.health=100
def eat(self,food):
if(food=="manzana"):
self.health-=10
elif(food=="leche"):
self.health+=5
else(food=="mondongo"):
self.health+= int(0.0001)
我在(self.name)上获得了无效的语法:<<
为什么不能将静态成员函数声明为const？
我知道静态函数不会对任何特定的类实例起作用.这意味着此类函数没有此指针(隐式地作为隐藏参数传递)到任何特定实例.但我不明白为什么在声明为const时会出现编译器错误,因为它没有更改任何特定实例.
其次,为什么不能将静态成员函数声明为虚拟？
需要对此进行一些澄清.
我正在运行这样的代码,它返回给我这个错误:
Incompatible integer to pointer conversion initializing NSArray *_strong with an expression of type 'int'.
代码是这样的:
- (NSArray *)randperm:(int)total
{
NSMutableArray *array = [[NSMutableArray alloc] init];
int counter = 0;
while (counter < total) {
NSNumber *randomInteger = [NSNumber numberWithInt:(arc4random_uniform(total)+1)];
if (![array containsObject:randomInteger]) {
[array addObject:(randomInteger)];
counter++;
}
}
NSArray *arr = [array copy];
return arr;
}
我这叫它:
NSArray *array = randperm(6);
这一行给我一个错误.不确定为什么会出现这样的错误.
表中的一列包含“NULL”值，我想将它们替换为某些值。
我看了这个帖子： Replace nulls values in sql using select statements? 并遵循答案。
我的sql语句：
Select ifnull(`option`, 'MCQ') as `option`
from question_table
此语句返回已包含“MCQ”的列，但“NULL”值尚未替换。
需要一些指导来改变这一点。
我尝试将应用程序添加到Django并命名为app main.我键入了django-admin.py startapp main.
当我运行python manage.py runserver时,我遇到这个错误:
Traceback (most recent call last):
File "manage.py", line 14, in <module>
execute_manager(settings)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 459, in execute_manager
utility.execute()
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command
klass = load_command_class(app_name, subcommand)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 69, in load_command_class
module = import_module('%s.management.commands.%s' % (app_name, name))
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 8, in <module>
from django.core.management.sql import custom_sql_for_model, emit_post_sync_signal
File "/Users/cnnlakshmen_2000/Projects/env/lib/python2.7/site-packages/django/core/management/sql.py", line 6, in <module>
from …我有一个疑问..这是我的测验中的问题..想知道这个问题的答案.
Question:
int foo(int);
double foo(int);
double foo(double);
void bar(int value){
double score = foo(value);
}
将选择哪个函数声明？或者它不是上述的？
假设代码是这样的:
#include <iostream>
using namespace std;
class dog
{
public:
virtual ~dog()
{
}
};
class yellowdog : public dog
{
int age;
public:
void bark() { cout << "woof." << endl;}
};
int main()
{
dog *pd = new dog();
yellowdog *py = dynamic_cast<yellowdog*>(pd);
py->bark();
cout << "py = " << py << endl;
cout << "pd = " << pd << endl;
}
输出:
woof.
py = 0x0
pd = 0x7fd4d34000e0
我明白了为什么PY = 0.我知道,有一个运行时检查,并在运行时检查,有一项不合格转换dog到yellowdog,PY …