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How do I compile and run a program in Java on my Mac?
How do I compile and run a program in Java on my mac?
5 Answers
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How do I properly clean up Excel interop objects?
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Excel does not quit because your application is still holding references to COM objects.
I guess you're invoking at least one member of a COM object without assigning it to a variable.
For me it was the excelApp.Worksheets object...
Split column at delimiter in data frame [duplicate]
... <- data.frame(ID=11:13, FOO=c('a|b','b|c','x|y'))
foo <- data.frame(do.call('rbind', strsplit(as.character(df$FOO),'|',fixed=TRUE)))
Or, if you want to replace the columns in the existing data.frame:
within(df, FOO<-data.frame(do.call('rbind', strsplit(as.character(FOO), '|', fixed=TRUE...
How to disable postback on an asp Button (System.Web.UI.WebControls.Button)
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Have your javascript return false when it's done.
<asp:button runat="server".... OnClientClick="myfunction(); return false;" />
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How do I copy SQL Azure database to my local development server?
Does anyone know how I can copy a SQL Azure database to my development machine? I'd like to stop paying to have a development database in the cloud, but it's the best way to get production data. I copy my production database to a new development database but I'd like to have that same database local...
Use of 'prototype' vs. 'this' in JavaScript?
...et by the call or by the use of bind, it defaults to the global object (window in a browser) or in strict mode, remains undefined.
JavaScript is an object-oriented language, i.e. most values are objects, including functions. (Strings, numbers, and booleans are not objects.)
So here are the snippet...
How do I add a placeholder on a CharField in Django?
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Look at the widgets documentation. Basically it would look like:
q = forms.CharField(label='search',
widget=forms.TextInput(attrs={'placeholder': 'Search'}))
More writing, yes, but the separation allows for better abstrac...
How do I format a date in Jinja2?
Using Jinja2, how do I format a date field? I know in Python I can simply do this:
9 Answers
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How to do the equivalent of pass by reference for primitives in Java
... The one that makes the most sense really depends on what you're trying to do.
Choice 1: make toyNumber a public member variable in a class
class MyToy {
public int toyNumber;
}
then pass a reference to a MyToy to your method.
void play(MyToy toy){
System.out.println("Toy number in play...
Database development mistakes made by application developers [closed]
...be using it.
It's quite common to see this failure on MySQL databases. I don't believe MyISAM supports it. InnoDB does. You'll find people who are using MyISAM or those that are using InnoDB but aren't using it anyway.
More here:
How important are constraints like NOT NULL and FOREIGN KEY if ...