大约有 43,000 项符合查询结果（耗时：0.0368秒） [XML]
LINQ: Distinct values
...d it should be okay:
var query = doc.Elements("whatever")
.Select(element => new {
id = (int) element.Attribute("id"),
category = (int) element.Attribute("cat") })
.Distinct();
If you're trying to get a dis...
error, string or binary data would be truncated when trying to insert
...ay cause it.
In my case i was creating the table with a field like this:
Select '' as Period, * From Transactions Into #NewTable
Therefore the field "Period" had a length of Zero and causing the Insert operations to fail. I changed it to "XXXXXX" that is the length of the incoming data and it n...
The model used to open the store is incompatible with the one used to create the store
... searching for a quick fix:
Open your .xcdatamodeld file
click on Editor
select Add model version...
Add a new version of your model (the new group of datamodels added)
select the main file, open file inspector (right-hand panel)
and under Versioned core data model select your new version of data ...
How to read contacts on Android 2.0
...,
ContactsContract.Contacts.HAS_PHONE_NUMBER,
};
String SELECTION = ContactsContract.Contacts.HAS_PHONE_NUMBER + "='1'";
Cursor contacts = managedQuery(contactUri, PROJECTION, SELECTION, null, null );
The above chunk of code returns a Cursor that points to the resulting query t...
Eclipse JPA Project Change Event Handler (waiting)
...ould probably try to open a discussion on the amount of included and not deselectable features/project included in a release. And it should maybe discuss ways to disable packaged features (such as JPT).
– mwhs
Mar 31 '14 at 8:38
...
Frequency table for a single variable
... the columns as such
[my_series[c].value_counts() for c in list(my_series.select_dtypes(include=['O']).columns)]
Breakdown:
my_series.select_dtypes(include=['O'])
Selects just the categorical data
list(my_series.select_dtypes(include=['O']).columns)
Turns the columns f...
Is there a MySQL option/feature to track history of changes to records?
...i AFTER INSERT ON MyDB.data FOR EACH ROW
INSERT INTO MyDB.data_history SELECT 'insert', NULL, NOW(), d.*
FROM MyDB.data AS d WHERE d.primary_key_column = NEW.primary_key_column;
CREATE TRIGGER MyDB.data__au AFTER UPDATE ON MyDB.data FOR EACH ROW
INSERT INTO MyDB.data_history SELECT 'up...
Unix command-line JSON parser? [closed]
... you to do powerful things really easily:
cat earthporn.json | underscore select '.data .title'
# [ 'Fjaðrárgljúfur canyon, Iceland [OC] [683x1024]',
# 'New town, Edinburgh, Scotland [4320 x 3240]',
# 'Sunrise in Bryce Canyon, UT [1120x700] [OC]',
# ...
# 'Kariega Game Reserve, South Afric...
Android Studio IDE: Break on Exception
...s.
The Breakpoints dialog appears. In the left pane, scroll to the bottom. Select Any exception under Java Exception Breakpoints
With Any exception selected, on the right pane, configure as follows:
Suspend: checked
All: selected
Condition: !(this instanceof java.lang.ClassNotFoundException)
Noti...
Move entire line up and down in Vim
...;A-down> but when I try those keys in vim in visual running in tmux the selection disappears and the cursor moves line up; without moving the selected lines.
– Konrad
Dec 27 '16 at 9:49
...