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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...same
b = new Array(), // a and b are arrays with length 0
c = ['foo', 'bar'], // these are the same
d = new Array('foo', 'bar'), // c and d are arrays with 2 strings
// these are different:
e = [3] // e.length == 1, e[0] == 3
f = new Array(3), // ...
How to modify a text file?
... on what you want to do. To append you can open it with "a":
with open("foo.txt", "a") as f:
f.write("new line\n")
If you want to preprend something you have to read from the file first:
with open("foo.txt", "r+") as f:
old = f.read() # read everything in the file
f.seek(0) # re...
No appenders could be found for logger(log4j)?
...%x - %m%n
# Print only messages of level WARN or above in the package com.foo.
log4j.logger.com.foo=WARN
Here is another configuration file that uses multiple appenders:
log4j.rootLogger=debug, stdout, R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apa...
django 1.5 - How to use variables inside static tag
... This won't work with things like ManifestStaticfilesStorage that changes foo.js into foo.8c9a23d.js
– Kos
Oct 25 '16 at 8:21
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...
What is the worst gotcha in C# or .NET? [closed]
...t only looking at methods originally declared in the type it's looking at. Foo(int) overrides the base method, so isn't considered. Foo(object) is applicable, so overload resolution stops there. Odd, I know.
– Jon Skeet
Jul 8 '09 at 13:24
...
A std::map that keep track of the order of insertion?
...; myTable;
// Initialize the hash table and record insert order.
myTable["foo"] = 0;
insertOrder.push_back("foo");
myTable["bar"] = 0;
insertOrder.push_back("bar");
myTable["baz"] = 0;
insertOrder.push_back("baz");
/* Increment things in myTable 100000 times */
// Print the final results.
for (in...
How to use transactions with dapper.net?
...on.BeginTransaction())
{
connection.Execute(
"INSERT INTO data(Foo, Bar) values (@Foo, @Bar);", listOf5000Items, transaction);
transaction.Commit();
}
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...
sort object properties and JSON.stringify
...('make properties in order', () => {
const obj = {
name: 'foo',
arr: [
{ x: 1, y: 2 },
{ y: 4, x: 3 },
],
value: { y: 2, x: 1, },
};
expect(orderedJsonStringify(obj))
.to.equal('{"arr":[{"x":1,"y":2},{"x":3,"y":4}],"nam...
AngularJs “controller as” syntax - clarification?
...use an es6 class as your controller and reference the methods in the HTML. foo() { ... } is way cleaner than $scope.foo = function() { ... }.
– Brian McCutchon
Aug 7 '16 at 5:01
...
Is there a performance gain in using single quotes vs double quotes in ruby?
...t waste your time.
Actual interpolation is a different story, of course. 'foo' will be almost exactly 1 second faster than "#{sleep 1; nil}foo".
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