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How to do a batch insert in MySQL
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Insert into table(col1,col2) select col1,col2 from table_2;
Please refer to MySQL documentation on INSERT Statement
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Aggregate / summarize multiple variables per group (e.g. sum, mean)
...-date), sum)
# summarising a specific set of non-grouping variables using select_helpers
# see ?select_helpers for more options
df2 <- df1 %>% group_by(year, month) %>% summarise_at(vars(starts_with('x')), sum)
df2 <- df1 %>% group_by(year, month) %>% summarise_at(vars(matches('.*...
Can't start Eclipse - Java was started but returned exit code=13
...ava. Click on it and you will find all the different versions. Now you can select which one to uninstall.
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“Use of undeclared type” in Swift, even though type is internal, and exists in same module
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In my case I had selected 3 targets (Project, UI & Unit tests), I had to deselect UI & Unit tests targets in order to solve this error
– Frakcool
Jan 15 '19 at 21:08
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Is there a way to do repetitive tasks at intervals?
...(5 * time.Second)
quit := make(chan struct{})
go func() {
for {
select {
case <- ticker.C:
// do stuff
case <- quit:
ticker.Stop()
return
}
}
}()
You can stop the worker by closing the quit channel: close(quit).
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git pushes with wrong user from terminal
...d + space, type keychain, press enter)
Under keychains on the upper left, select "login"
Under category on the left, select "passwords"
find the name "github" and delete it.
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Pick any kind of file via an Intent in Android
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how can I get the selected file ? I guess it's the path, but how ?
– Francisco Corrales Morales
Nov 26 '14 at 17:31
1
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Could not load file or assembly 'System.Web.Mvc'
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In VS2010, right click the project in the Solution Explorer and select 'Add Deployable Dependencies'. Then check the MVC related check boxes in the following dialog.
This creates a '_bin_deployableAssemblies' folder in the project which contains all the .dll files mentioned in other answ...
Solving a “communications link failure” with JDBC and MySQL [duplicate]
... TOMCAT6_SECURITY=no
use validationQuery property
use validationQuery="select now()" to make sure each query has responses
AutoReconnect
Add this code to your connection string:
&autoReconnect=true&failOverReadOnly=false&maxReconnects=10
Although non of these solutions worke...
Why does jQuery or a DOM method such as getElementById not find the element?
...for document.getElementById , $("#id") or any other DOM method / jQuery selector not finding the elements?
9 Answers
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