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How do I make a LinearLayout scrollable?
...iew
android:id="@+id/title"
android:text="@string/title"
android:layout_widt
Rails :include vs. :joins
...ment belongs_to a User.
The User model has the following attributes: Name(string), Age(integer). The Comment model has the following attributes:Content, user_id. For a comment a user_id can be null.
Joins:
:joins performs a inner join between two tables. Thus
Comment.joins(:user)
#=> <A...
Why is std::map implemented as a red-black tree?
...cause the main operation is already O(log n). even after all the slightly extra work that AVL trees do results in a more tightly balanced tree which leads to slightly faster lookups. so it is a perfectly valid tradeoff and does not make AVL trees inferior to red-black trees.
–...
How to get ID of the last updated row in MySQL?
...uids := CONCAT_WS(',', fooid, @uids) );
SELECT @uids;
This will return a string with all the IDs concatenated by a comma.
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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...ds names - 1 per line
-q [ --query ] arg query filter, as a JSON string
--csv export to csv instead of json
-o [ --out ] arg output file; if not specified, stdout is used
--jsonArray output to a json array rather than one object per
...
How can I find the first occurrence of a sub-string in a python string?
So if my string is "the dude is a cool dude".
I'd like to find the first index of 'dude':
5 Answers
...
Handle ModelState Validation in ASP.NET Web API
...BaseApiController or something like that
var errors = new List<string>();
foreach (var state in ModelState)
{
foreach (var error in state.Value.Errors)
{
errors.Add(error.ErrorMessage);
}
}
return Requ...
Check whether a string contains a substring
How can I check whether a given string contains a certain substring, using Perl?
3 Answers
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NSString: isEqual vs. isEqualToString
What is the difference between isEqual: and isEqualToString: ?
5 Answers
5
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Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”
... Version,
algorithm AlgorithmIdentifier,
PrivateKey BIT STRING
}
AlgorithmIdentifier ::= SEQUENCE {
algorithm OBJECT IDENTIFIER,
parameters ANY DEFINED BY algorithm OPTIONAL
}
So for an RSA private key, the OID is 1.2.840.113549.1.1.1 and there is a RSAPrivat...