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FirstOrDefault: Default value other than null
...d NullReferenceException when I'm working with collections:
public class Foo
{
public string Bar{get; set;}
}
void Main()
{
var list = new List<Foo>();
//before C# 6.0
string barCSharp5 = list.DefaultIfEmpty(new Foo()).FirstOrDefault().Bar;
//C# 6.0 or later
var barCS...
Deploy a project using Git push
...f .git happens to be in the same naming scheme as working directory. i.e. /foo/bar (working directory) and /foo/bar.git (barebone git repository). So make sure you rename /foo/bar to something else, such as /foo/bar.live or /foo/blah Well, in case you are wondering, the exact error message you woul...
Ignore .pyc files in git repository
... "**" followed by a slash means match in all directories. For example, "**/foo" matches file or directory "foo" anywhere, the same as pattern "foo". "**/foo/bar" matches file or directory "bar" anywhere that is directly under directory "foo".
...
ValueError: setting an array element with a sequence
...uple into a numpy
#array element
def foo():
return 3
numpy.array([2, foo()]) #good
def foo():
return [3,4]
numpy.array([2, foo()]) #Fail, can't convert a list into a numpy
#array element
2. B...
How to read data From *.CSV file using javascript?
...an example that streams a remote file):
Papa.parse("http://example.com/bigfoo.csv", {
download: true,
step: function(row) {
console.log("Row:", row.data);
},
complete: function() {
console.log("All done!");
}
});
If your web page locks up during parsing, Papa c...
How do you overcome the HTML form nesting limitation?
...on="/post/dispatch/save" method="post">
<input type="text" name="foo" /> <!-- several of those here -->
</form>
<form id="deleteForm" action="/post/dispatch/delete" method="post">
<input type="hidden" value="some_id" />
</form>
<div id="toolbar">...
What's the “big idea” behind compojure routes?
... :remote-addr "127.0.0.1"
:uri "/foo/bar"
:scheme :http
:headers {}
:request-method :get})
{:status 200,
:headers {"Content-Type" "text/html"},
:body "http://127.0.0.1:8...
Editing Javascript using Chrome Developer Tools
... need to be redefined.
for instance, if the page has:
<script>
var foo = function() { console.log("Hi"); }
</script>
I can take the content between the script, edit it, then enter it into the debugger like:
foo = function() { console.log("DO SOMETHING DIFFERENT"); }
and it will wo...
Read-only list or unmodifiable list in .NET 4.0
...eadOnlyCollection, which has been around since .NET2.
IList<string> foo = ...;
// ...
ReadOnlyCollection<string> bar = new ReadOnlyCollection<string>(foo);
or
List<string> foo = ...;
// ...
ReadOnlyCollection<string> bar = foo.AsReadOnly();
This creates a read-onl...
CoffeeScript on Windows?
...on Windows/Linux) looks like this:
java -jar jcoffeescript-1.0.jar < foo.coffee > foo.js
You will need to download & build the Java source code (use IntelliJ Community Edition to avoid downloading Ant) or a pre-built download for CoffeeScript v1.0.
I now use jcoffeescript in place of...