我想使用git在bitbucket上托管我的源码,因为我显然得到了一个免费的私人仓库,我想使用bitbucket的源代码在heroku上托管我的应用程序.
我可以使用github客户端和heroku工具带来完成它.它会起作用吗？Github很棒,但我不希望每个人都看到我的代码,我不想支付私人回购,因为它是一个小项目.
我已经运行了git status
# On branch master
# Your branch is ahead of 'origin/master' by 4 commits.
# (use "git push" to publish your local commits)
#
# Changes not staged for commit:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: app/views/layouts/_header.html.erb
#
no changes added to commit (use "git add" and/or "git commit -a")
我希望在提交到我的远程存储库之前撤消所有4次提交和更改未提交的提交.我怎样才能做到这一点？
我尝试使用自制软件安装elixir,我得到以下错误
==> Pouring libtiff-4.0.3.yosemite.bottle.tar.gz
Error: An unexpected error occurred during the `brew link` step
The formula built, but is not symlinked into /usr/local
文件存在 - /usr/local/lib错误:文件存在 - /usr/local/lib
我跑了brew doctor,我看到了这个
Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
libpng
libtiff
所以我跑了brew link libpng,我得到了这个
Linking /usr/local/Cellar/libpng/1.6.17... Error: File exists - …我克隆了此应用程序https://github.com/sequelize/express-example，它似乎是官方的sequelize express示例，但是当我尝试运行它时出现此错误
Unhandled rejection TypeError: Cannot read property '_pseudo' of undefined
at conformInclude (/Users/wasswasam/express-example-master/node_modules/sequelize/lib/model.js:277:14)
我不确定发生了什么。
我在数据框中有一列有分类数据,但缺少一些数据,即NaN.我想对这些数据进行线性插值以填补缺失值,但我不确定如何去做.我不能删除NaN来将数据转换为分类类型,因为我需要填充它们.一个简单的例子来演示我想要做什么.
col1 col2
5 cloudy
3 windy
6 NaN
7 rainy
10 NaN
假设我想转换 col2为分类数据但保留NaN并使用线性插值填充它们我该如何处理它.让我们说在将列转换为分类数据后,它看起来像这样
col2
1
2
NaN
3
NaN
然后我可以做线性插值并得到这样的东西
col2
1
2
3
3
2
我怎样才能做到这一点？
我使用ember-cli创建了一个新的ember应用程序
ember new myapp
cd myapp
ember server.
我得到以下神秘错误.
ember server
version: 0.2.0-beta.1
Livereload server on port 35729
Serving on http://0.0.0.0:4200/
undefined is not a function
TypeError: undefined is not a function
at rimraf (/vagrant/fadis-web/node_modules/ember-cli/node_modules/broccoli-caching-writer/node_modules/rimraf/rimraf.js:57:13)
at lib$rsvp$node$$tryApply (/vagrant/fadis-web/node_modules/ember-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1467:11)
at lib$rsvp$node$$handleValueInput (/vagrant/fadis-web/node_modules/ember-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1567:20)
at fn (/vagrant/fadis-web/node_modules/ember-cli/node_modules/broccoli-caching-writer/node_modules/rsvp/dist/rsvp.js:1555:18)
at /vagrant/fadis-web/node_modules/ember-cli/node_modules/broccoli-caching-writer/index.js:100:14
at lib$rsvp$$internal$$tryCatch (/vagrant/fadis-web/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:489:16)
at lib$rsvp$$internal$$invokeCallback (/vagrant/fadis-web/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:501:17)
at lib$rsvp$$internal$$publish (/vagrant/fadis-web/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:472:11)
at lib$rsvp$asap$$flush (/vagrant/fadis-web/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:1290:9)
at process._tickCallback (node.js:355:11)
我是新手,所以我不知道发生了什么.有什么建议.
我尝试homebrew在 Macbook pro Apple M1 上安装 MacOS Monterey，但在这一步总是失败，如下所示。
HEAD is now at 472edc06e Merge pull request #12943 from Homebrew/update-man-
completions
==> Tapping homebrew/core
remote: Enumerating objects: 1150006, done.
remote: Counting objects: 100% (29/29), done.
remote: Compressing objects: 100% (19/19), done.
error: RPC failed; curl 56 LibreSSL SSL_read: error:06FFF064:digital envelope
routines:CRYPTO_internal:bad decrypt, errno 0
error: 1835 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output
Failed during: …我试图生成具有11个系数的10阶多项式的值.我也试图产生它的衍生物.我写了三个函数如下所示.此代码生成多项式的值.a1到a10是系数.
float polynm( float a0,float a1,float a2,float a3,float a4,float a5,float a6,float a7,float a8,float a9,float a10,float x)
{
float poly = a0 + a1*x + a2*pow(x,2)+a3*pow(x,3)+a4*pow(x,4)+a5*pow(x,5)+a6*pow(x,6)+a7*pow(x,7)+a8*pow(x,8)+a9*pow(x,9)+a10*pow(x,10);
return poly;
}
此代码生成它调用函数deri的多项式的导数值
float polynm_der(float a0,float a1,float a2,float a3,float a4,float a5,float a6,float a7,float a8,float a9,float a10,float x)
{ float der = a1 + a2*deri(x,2)+a3*deri(x,3)+a4*deri(x,4)+a5*deri(x,5)+a6*deri(x,6)+a7*deri(x,7)+a8*deri(x,8)+a9*deri(x,9)+a10*deri(x,10);
return der;
}
deri is below
float deri(float x,int n)
{
float term_der = n*pow(x,n-1);
return term_der;
}
多项式的代码是低效的.如果我想生成一个100阶多项式,它将变得不可能.有没有办法可以递归生成多项式及其导数,以避免笨重的代码.
我在c中创建了一个程序，该程序假设要使用牛顿拉夫森方法估算10阶多项式的根。用户输入10个系数，并假设估计方程的根。绝对相对误差为0.00000001，允许的最大迭代次数为70。示例代码如下。
n=0;
while(abserr<=0.00000001){
yold=y;
y = y-(poly(y,coefficients,11)/poly_der(y,coefficients,11));
ynew = y;
error=ynew-yold;
abserr=sqrt(error*error);
printf("iteration x%d = %.2f error =%.2f\n",n+1,y,abserr);
n++;
iteration++;
if(iteration==70){
printf("you have reached the maximum number of iterations\n");
break;}
}
函数poly和poly_der分别计算多项式的值及其导数。下面有定义。
float poly(float x, float coefficients[], int order)
{
int idx;
float total;
for (idx = 0; idx < order; idx++)
total += coefficients[idx] * pow(x, idx);
return total;
}
float poly_der(float x, float coefficients[], int order)
{
int idx;
float total;
for (idx = 0; idx < order; …我在vista机器上安装了apache server 2.2.19.它运行正常但我尝试通过修改httpd.conf文件来配置它以使用php.这些是我添加的行
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
PHPIniDir “C:\PHP”
我在这一行下面加了这个
AddType application/x-gzip .gz .tgz
我也添加了这一行
LoadModule php5_module “C:\PHP\php5apache2_2.dll”
我在这一行下面加了这个
#LoadModule vhost_alias_module modules/mod_vhost_alias.so
我试图重新启动apache服务器,但每次我这样做都会返回一条错误消息,指出请求的操作失败了.可能是什么问题呢？