小编Min*_* Li的帖子

基本上，当单击按钮时，它会告诉移动设备转到相机。一旦相机拍照，它就会给我图像数据（它被称为数据 URL 吗？）。这是我处理它的代码：

var imagesrc = "data:image/jpeg;base64," + imageData;

var myimage = new Image(500, 500);
myimage.src = imagesrc;            <---- to populate the object with the colored image
myimage.src = grayscale(myimage);  <---- here I set it to the grayscale image

我想调用一个方法叫它grayscale()返回已经变成灰度的图像。我试过这个：

function grayscale(image){
    var canvasContext = canvas.getContext('2d');
    var imgW = image.width;
    var imgH = image.height;
    canvas.width = imgW;
    canvas.height = imgH;

    canvasContext.drawImage(image, 0, 0);

    var imgPixels = canvasContext.getImageData(0, 0, imgW, imgH);


    for(>var y = 0; y < imgPixels.height; y++){ …

我正在运行 Gitlab-CE v8.11.3-ce.1

我的房子断电了，所以我的 Gitlab 服务器突然关闭了。我重新打开电源，它给了我 500 错误。当我这样做时sudo gitlab-ctl reconfigure，我在日志中得到了这个：

[execute] psql: could not connect to server: Connection refused
            Is the server running locally and accepting
            connections on Unix domain socket "/var/opt/gitlab/postgresql/.s.PGSQL.5432"?

这是我的数据库部分gitlab.rb：

# gitlab_rails['db_adapter'] = "postgresql"
# gitlab_rails['db_encoding'] = "unicode"
# gitlab_rails['db_collation'] = nil
# gitlab_rails['db_database'] = "gitlabhq_production"
# gitlab_rails['db_pool'] = 10
# gitlab_rails['db_username'] = "gitlab"
# gitlab_rails['db_password'] = nil
# gitlab_rails['db_host'] = nil
# gitlab_rails['db_port'] = 5432
# gitlab_rails['db_socket'] = nil
# gitlab_rails['db_sslmode'] = …

简单的问题。我的选择下拉菜单是这样的：

<select class="selectpicker" multiple data-container="body" data-title="Options" data-size="10" data-width="100%" data-selectedTextFormat="static" >  
    <option value="default">Test</option>
</select>

我希望无论选择什么，都保留该标题（“选项”）。即使我这样做：

$('.selectpicker').selectpicker('val', "default");

我希望它保留标题“选项”。正如您所看到的，我尝试了 anddata-title属性data-selectedTextFormat，但它不起作用。