大约有 41,000 项符合查询结果（耗时：0.0539秒） [XML]
how to create a Java Date object of midnight today and midnight tomorrow?
...ime zone (CDT). 7pm in CDT is midnight in GMT. If you need a midnight in a selected time zone, you have to add this time zone's offset, taking DST into account.
– Andrei Volgin
Nov 2 '12 at 18:30
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In Bash, how can I check if a string begins with some value?
...
You can select just the part of the string you want to check:
if [ "${HOST:0:4}" = user ]
For your follow-up question, you could use an OR:
if [[ "$HOST" == user1 || "$HOST" == node* ]]
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How to delete history of last 10 commands in shell?
...16 17:55:11 echo "Command 9"
1012 25-04-2016 17:55:14 echo "Command 10"
Select the start and end positions for the items you want to delete. I'm going to delete entries 1006 to 1008.
for h in $(seq 1006 1008); do history -d 1006; done
This will generate history -d commands for 1006, then 1007...
Calculate distance between 2 GPS coordinates
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This is very easy to do with geography type in SQL Server 2008.
SELECT geography::Point(lat1, lon1, 4326).STDistance(geography::Point(lat2, lon2, 4326))
-- computes distance in meters using eliptical model, accurate to the mm
4326 is SRID for WGS84 elipsoidal Earth model
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jQuery UI Dialog - missing close icon
... fix it manually with some dom manipulation on the Dialog Open event:
$("#selector").dialog({
open: function() {
$(this).closest(".ui-dialog")
.find(".ui-dialog-titlebar-close")
.removeClass("ui-dialog-titlebar-close")
.html("<span class='ui-button-icon-primar...
Is a LINQ statement faster than a 'foreach' loop?
...ter than a flat foreach, but most likely you wouldn't have done a blanket "select * from foo" anyway, so that isn't necessarily a fair comparison.
Re PLINQ; parallelism may reduce the elapsed time, but the total CPU time will usually increase a little due to the overheads of thread management etc.
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Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements. Previ
...h
declare @error int, @message varchar(4000), @xstate int;
select @error = ERROR_NUMBER(), @message = ERROR_MESSAGE(), @xstate = XACT_STATE();
if @xstate = -1
rollback;
if @xstate = 1 and @trancount = 0
rollback
if @xstate = 1 and @tran...
Left align two graph edges (ggplot)
...we have two columns? gA$heights[2:3] does not seem to work. Do I have to select another element of the grob than 2:3? Thank you!
– Etienne Low-Décarie
Jun 28 '13 at 16:23
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SVN+SSH, not having to do ssh-add every time? (Mac OS)
...e is a -K flag on OS X for ssh-add. Additional to that, this should be the selected answer.
– kaiser
Dec 8 '15 at 13:54
1
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How to simulate a mouse click using JavaScript?
...n;
}
var eventMatchers = {
'HTMLEvents': /^(?:load|unload|abort|error|select|change|submit|reset|focus|blur|resize|scroll)$/,
'MouseEvents': /^(?:click|dblclick|mouse(?:down|up|over|move|out))$/
}
var defaultOptions = {
pointerX: 0,
pointerY: 0,
button: 0,
ctrlKey: false,
...