大约有 21,000 项符合查询结果（耗时：0.0220秒） [XML]
Can you center a Button in RelativeLayout?
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Try
android:layout_centerHorizontal="true"
Exactly like this, it works for me:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android...
MySQL Update Inner Join tables query
I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query:
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How do I partially update an object in MongoDB so the new object will overlay / merge with the exist
... data then?
You know you can do the following:
db.collection.update( { _id:...} , { $set: someObjectWithNewData }
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android.view.InflateException: Binary XML file: Error inflating class fragment
I have a very frustrating error that I cannot explain. I created an Android application that uses Android AppCompat to make it compatible with older versions. Here is my main activity layout file:
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Postgres manually alter sequence
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The parentheses are misplaced:
SELECT setval('payments_id_seq', 21, true); # next value will be 22
Otherwise you're calling setval with a single argument, while it requires two or three.
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Android - Dynamically Add Views into View
...in any details dynamically here
TextView textView = (TextView) v.findViewById(R.id.a_text_view);
textView.setText("your text");
// insert into main view
ViewGroup insertPoint = (ViewGroup) findViewById(R.id.insert_point);
insertPoint.addView(v, 0, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.F...
Best way to use multiple SSH private keys on one client
...it usage within the same server). I tried simply stacking the keys in the id_rsa files to no avail.
20 Answers
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Javascript Equivalent to C# LINQ Select
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Yes, Array.map() or $.map() does the same thing.
//array.map:
var ids = this.fruits.map(function(v){
return v.Id;
});
//jQuery.map:
var ids2 = $.map(this.fruits, function (v){
return v.Id;
});
console.log(ids, ids2);
http://jsfiddle.net/NsCXJ/1/
Since array.map isn't supported ...
Difference between one-to-many and many-to-one relationship
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Yes, it a vice versa. It depends on which side of the relationship the entity is present on.
For example, if one department can employ for several employees then, department to employee is a one to many relationship (1 department employs many employees), while employ...
ruby on rails f.select options with custom attributes
...e in your question. Using html5 data-attributes:
<%= f.select :country_id, options_for_select(
@countries.map{ |c| [c.name, c.id, {'data-currency_code'=>c.currency_code}] }) %>
Adding an initial selection:
<%= f.select :country_id, options_for_select(
@countries.map{ |c| [c.n...