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C++, variable declaration in 'if' expression
.... If you really need to restrict the scope of that variable you can put an extra block around the if block. I have never used this syntax.
– Giorgio
Oct 20 '11 at 15:53
2
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StringIO in Python3
I am using Python 3.2.1 and I can't import the StringIO module. I use
io.StringIO and it works, but I can't use it with numpy 's genfromtxt like this:
...
What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
...Array, NSDictionary, and NSNumber (just like one can create literals for NSString)
NSArray Literals
Previously:
array = [NSArray arrayWithObjects:a, b, c, nil];
Now:
array = @[ a, b, c ];
NSDictionary Literals
Previously:
dict = [NSDictionary dictionaryWithObjects:@[o1, o2, o3]
...
How to vertically center content with variable height within a div?
...o element: CSS-Tricks: Centering in the Unknown.
It doesn’t require any extra markup and seems to work extremely well. I couldn’t use the display: table method because table elements don’t obey the max-height property.
.block {
height: 300px;
text-align: center;
background: #c0...
C# Lazy Loaded Automatic Properties
...can use the 4.0 Lazy<T> type to create this pattern
private Lazy<string> _someVariable =new Lazy<string>(SomeClass.IOnlyWantToCallYouOnce);
public string SomeVariable => _someVariable.Value;
This code will lazily calculate the value of _someVariable the first time the Value e...
How to achieve function overloading in C?
...ce, and you need to mess about a bit if you want your overloads to support string literals. Still overall pretty cool though.
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CSS text-overflow in a table cell?
...the ‘text-overflow’ property
text-overflow clip | ellipsis | <string>
Initial: clip
APPLIES TO: BLOCK CONTAINERS <<<<
Inherited: no
Percentages: N/A
Media: visual
Computed value: as specified
The M...
What is the difference between “text” and new String(“text”)?
...
new String("text");
explicitly creates a new and referentially distinct instance of a String object; String s = "text"; may reuse an instance from the string constant pool if one is available.
You very rarely would ever want to ...
Validating with an XML schema in Python
...bjectify
from lxml.etree import XMLSyntaxError
def xml_validator(some_xml_string, xsd_file='/path/to/my_schema_file.xsd'):
try:
schema = etree.XMLSchema(file=xsd_file)
parser = objectify.makeparser(schema=schema)
objectify.fromstring(some_xml_string, parser)
prin...
Jade: Links inside a paragraph
... "<a href='$2'>$1</a>");
return jade.compile(txt)();
};
jadestring = ""+ // p.s. I hate javascript's non-handling of multiline strings
"h1 happy days\n"+
":inline\n"+
" p this can have [a link](http://going-nowhere.com/) in it"
f = jade.compile(jadestring);
console.log(f());...