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What are the uses of “using” in C#?
...ementing IDisposable which hold on to unmanaged resources like streams and file handles will also implement a finalizer that will ensure that Dispose is called during garbage collection. The problem is that GC might not happen for a relatively long time. using makes sure that Dispose is called once ...
variable === undefined vs. typeof variable === “undefined”
... makes sense. The jQuery team is likely more concerned about the impact on file size. foo === undefined, when minimized, is probably something like f===u, whereas typeof foo === "undefined" can only be reduced to typeof f==="undefined".
– Patrick McElhaney
Jan ...
How to set default values in Rails?
...efault value for that column on that table, setting them in a DB migration file is the easiest way:
class SetDefault < ActiveRecord::Migration
def self.up
change_column :people, :last_name, :type, :default => "Doe"
end
def self.down
# You can't currently remove default values i...
How to upgrade Git to latest version on macOS?
...if you added:
export PATH=/usr/local/git/bin:/usr/local/sbin:$PATH
to a file named .bashrc in your home folder. This way any other software that you might install in /usr/local/git/bin will also be found first.
For an easy way to do this just type:
echo "export PATH=/usr/local/git/bin:/usr/loca...
Python equivalent for PHP's implode?
...kay I've just found a function that does what I wanted to do;
I read in a file with words in a format like:
Jack/Jill/my/kill/name/bucket
I then split it up using the split() method and once I had the word into an list, I concatenated the words with this method:
concatenatedString = ' - '.join(...
Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
...rt java.util.function.*; and import java.util.stream.*; at the top of your file.
– sffc
Sep 13 '15 at 8:17
...
datetime.parse and making it work with a specific format
I have a datetime coming back from an XML file in the format:
2 Answers
2
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Programmatically set the initial view controller using Storyboards
...ad:
Failed to instantiate the default view controller for UIMainStoryboardFile 'MainStoryboard' - perhaps the designated entry point is not set?
And you'll notice that your window property in the app delegate is now nil.
In the app's setting, go to your target and the Info tab. There clear the v...
How to use NSURLConnection to connect with SSL for an untrusted cert?
...ied from Apple sample code AdvancedURLConnections, and you need to add two files(Credentials.h, Credentials.m) from apple sample code to your projects.
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
return [protection...
How to define “type disjunction” (union types)?
... a StringOrInt[Boolean]") is plugged, at least if StringOrInt resides in a file of its own. Then the witness objects must be defined in the same souce as StringOrInt.
– Randall Schulz
Aug 18 '10 at 3:34
...