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PostgreSQL - fetch the row which has the Max value for a column
...le (called "lives") that contains records with columns for time_stamp, usr_id, transaction_id, and lives_remaining. I need a query that will give me the most recent lives_remaining total for each usr_id
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The key must be an application-specific resource id
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The tag id must be unique so it wants it to be an id created in a resources file to guarantee uniqueness.
If the view will only contain one tag though you can just do
setTag(objContact.onlineid);
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How to find serial number of Android device?
I need to use a unique ID for an Android app and I thought the serial number for the device would be a good candidate. How do I retrieve the serial number of an Android device in my app ?
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Can multiple different HTML elements have the same ID if they're different elements?
Can multiple HTML elements have the same ID if they're of different element types? Is a scenario like this valid? Eg:
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How can I assign an ID to a view programmatically?
In an XML file, we can assign an ID to a view like android:id="@+id/something" and then call findViewById() , but when creating a view programmatically, how do I assign an ID?
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Rails find_or_create_by more than one attribute?
...ibutes can be connected with an and:
GroupMember.find_or_create_by_member_id_and_group_id(4, 7)
(use find_or_initialize_by if you don't want to save the record right away)
Edit: The above method is deprecated in Rails 4. The new way to do it will be:
GroupMember.where(:member_id => 4, :group...
App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...tipleWindows
Returns whether the WebView supports multiple windows
UseWideViewPort
Returns whether the WebView should enable support for the ‘viewport’ HTML meta tag or should use a wide viewport.
UserAgent
Sets the WebView’s user-agent string. If the string is null or empty, the sys...
PHP/MySQL insert row then get 'id'
The 'id' field of my table auto increases when I insert a row. I want to insert a row and then get that ID.
10 Answers
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What is the standard naming convention for html/css ids and classes?
...sing it a lot. For example, if you've got your underscore key on the underside of the keyboard (unlikely, but entirely possible), then stick to hyphens. Just go with what is best for yourself. Additionally, all 3 of these conventions are easily readable. If you're working in a team, remember to keep...
SQL WHERE ID IN (id1, id2, …, idn)
I need to write a query to retrieve a big list of ids.
9 Answers
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