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Optimistic vs. Pessimistic locking
...stay unmodified for the duration, it's as accurate as pessimistic locking (select for update style) on those same records. The main difference is that optimistic locking incurs overhead only if there's a conflict, whereas pessimistic locking has reduced overhead on conflict. So optimistic is best ...
How do I change the data type for a column in MySQL?
...n type to another type, you can generate queries using a query like this:
select distinct concat('alter table ',
table_name,
' modify ',
column_name,
' <new datatype> ',
if(is_nu...
Converting a List to a comma separated string
...
List<int> list = ...;
string.Join(",", list.Select(n => n.ToString()).ToArray())
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File Upload ASP.NET MVC 3.0
...esult Index(HttpPostedFileBase file)
{
// Verify that the user selected a file
if (file != null && file.ContentLength > 0)
{
// extract only the filename
var fileName = Path.GetFileName(file.FileName);
// store the file insi...
Convert data.frame column to a vector?
... The reminder of drop=FALSE is useful - this helps me in cases where I may select N columns from a data.frame, in those cases where N=1.
– Iterator
Aug 15 '11 at 20:42
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How do I free my port 80 on localhost Windows?
...ative rights. open start, and write in search "cmd" right click on cmd and select Run as administrator.
– MuhFred
Dec 5 '14 at 19:30
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How do I make $.serialize() take into account those disabled :input elements?
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Best solution, works for select, checkbox, radio , hidden and disabled inputs
– Plasebo
Jun 19 '18 at 9:32
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How to set radio button checked as default in radiogroup?
...not properly set with your Radio Buttons. This is the reason you can multi-select the radio buttons. I tried many things, finally i did a trick which is wrong actually, but works fine.
for ( int i = 0 ; i < myCount ; i++ )
{
if ( i != k )
{
System.out.println ( "i = " + i );
...
How to reset Android Studio
...e list of recent projects. Now right click the item you want to remove and select Remove from list (repeat for all items to remove).
– free3dom
Nov 19 '14 at 7:24
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Can you resolve an angularjs promise before you return it?
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I think this answer should be selected.
– Morteza Tourani
May 8 '16 at 20:13
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