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Given a class, see if instance has method (Ruby)
I know in Ruby that I can use respond_to? to check if an object has a certain method.
12 Answers
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How to get the insert ID in JDBC?
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If it is an auto generated key, then you can use Statement#getGeneratedKeys() for this. You need to call it on the same Statement as the one being used for the INSERT. You first need to create the statement using Statement.RE...
Safely casting long to int in Java
What's the most idiomatic way in Java to verify that a cast from long to int does not lose any information?
10 Answers
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Decimal separator comma (',') with numberDecimal inputType in EditText
...public void afterTextChanged(Editable s) {
double doubleValue = 0;
if (s != null) {
try {
doubleValue = Double.parseDouble(s.toString().replace(',', '.'));
} catch (NumberFormatException e) {
//Error
}
}
//Do something with doubleValue
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How to output a comma delimited list in jinja python template?
If I have a list of users say ["Sam", "Bob", "Joe"] , I want to do something where I can output in my jinja template file:
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How can I click a button behind a transparent UIView?
...rn false when the point isn't within an eligible child view, like this:
Swift:
class PassThroughView: UIView {
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
for subview in subviews {
if !subview.isHidden && subview.isUserInteractionEn...
Print a file, skipping the first X lines, in Bash [duplicate]
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$ tail great-big-file.log
< Last 10 lines of great-big-file.log >
If you really need to SKIP a particular number of "first" lines, use
$ tail -n +<N+1> <filename>
< filename, excluding first N lines. >
That is, if you want to skip N lines, you start printing line N+1. E...
How to remove a column from an existing table?
...y additional table changes but generally speaking this is not so trivial.
If this column is referenced by other tables then you need to figure out what to do with other tables/columns. One option is to remove foreign keys and keep referenced data in other tables.
Another option is to find all refe...
Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Best way to work with transactions in MS SQL Server Management Studio
... some T-SQL queries here.
Rollback transaction -- OR commit transaction
If you want to incorporate error handling you can do so by using a TRY...CATCH BLOCK. Should an error occur you can then rollback the tranasction within the catch block.
For example:
USE AdventureWorks;
GO
BEGIN TRANSACTION...