大约有 47,000 项符合查询结果（耗时：0.0654秒） [XML]
Find all records which have a count of an association greater than zero
...> 17
[14] pry(main)> Article.joins(:comments).distinct.to_sql
=> "SELECT DISTINCT \"articles\".* FROM \"articles\" INNER JOIN \"comments\" ON \"comments\".\"article_id\" = \"articles\".\"id\""
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Is it possible to break a long line to multiple lines in Python [duplicate]
...or you will get a list of strings instead of one long string:
queryText= "SELECT * FROM TABLE1 AS T1"\
"JOIN TABLE2 AS T2 ON T1.SOMETHING = T2.SOMETHING"\
"JOIN TABLE3 AS T3 ON T3.SOMETHING = T2.SOMETHING"\
"WHERE SOMETHING BETWEEN <WHATEVER> AND <WHATEVER ELSE>"\
"ORDER BY WHATEVERS DE...
psql: FATAL: database “” does not exist
...euser --interactive
When prompted for role name, enter linux username, and select Yes to superuser question.
Still logged in as postgres user, create a database: createdb <username_from_step_3>
Confirm error(s) are gone by entering: psql at the command prompt.
Output should show psql (x.x.x) T...
Ternary operator in AngularJS templates
... above creates an object with two properties. The array syntax is used to select either the property with name true or the property with name false, and return the associated value.
E.g.,
<li class="{{{true: 'myClass1 myClass2', false: ''}[$first]}}">...</li>
or
<li ng-class="{tru...
Changing the default header comment license in Xcode
...o change the organization name in Xcode click on the project file so it is selected (left sidebar of Xcode in the Project navigator) > In the File Inspector (right sidebar of Xcode) change the Organization text box.
sha...
onMeasure custom view explanation
... there's absolutely no need for you to override it.
Devunwired code (the selected and most voted answer here) is almost identical to what the SDK implementation already does for you (and I checked - it had done that since 2009).
You can check the onMeasure method here :
protected void onMeasure...
Change Checkbox value without triggering onCheckChanged
... The doc reads "Called when the checked radio button has changed. When the selection is cleared, checkedId is -1". This is really misleading, it should either have the isChecked passed through as well.
– AA_PV
Jan 3 '17 at 22:10
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How to check if a file contains a specific string using Bash
...matched.
(-F is specified by POSIX.)
-x, --line-regexp
Select only those matches that exactly match the whole line. (-x is specified by
POSIX.)
-q, --quiet, --silent
Quiet; do not write anything to standard output. Exit immediately with zero
status if any match...
How to create PDFs in an Android app? [closed]
... @lalitm It is not as it is in ios. Pdf generated in iOS has selectable text written in doc. But in android its a image.
– Kantesh
Nov 27 '14 at 11:28
2
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Hide keyboard when scroll UITableView
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You can do this right in Interface Builder. Select your UITableView and open the Attributes Inspector. In the Scroll View section set the Keyboard field to Dismiss on Drag.
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