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What's the idiomatic syntax for prepending to a short python list?
...
If someone finds this question like me, here are my performance tests of proposed methods:
Python 2.7.8
In [1]: %timeit ([1]*1000000).insert(0, 0)
100 loops, best of 3: 4.62 ms per loop
In [2]: %timeit ([1]*1000000)[0:0] = [0]
100 loops, best of 3: 4.55 ms per loop
In [3]: %timeit [0]...
How do I print bold text in Python?
...inal import render
print render('%(BG_YELLOW)s%(RED)s%(BOLD)sHey this is a test%(NORMAL)s')
print render('%(BG_GREEN)s%(RED)s%(UNDERLINE)sAnother test%(NORMAL)s')
UPDATED:
I wrote a simple module named colors.py to make this a little more pythonic:
import colors
with colors.pretty_output(colors...
How to remove all line breaks from a string
...plest solution would be:
let str = '\t\n\r this \n \t \r is \r a \n test \t \r \n';
str.replace(/\s+/g, ' ').trim();
console.log(str); // logs: "this is a test"
.replace() with /\s+/g regexp is changing all groups of white-spaces characters to a single space in the whole string then we .tr...
How to list all installed packages and their versions in Python?
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WOW: Just looked into documentation of latest version of pip and seems like they have added pip list: pip-installer.org/en/latest/usage.html#pip-list - so this is actually something that is coming already!
– jsalonen
Feb 9 '13 ...
Better way to cast object to int
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Use Int32.TryParse as follows.
int test;
bool result = Int32.TryParse(value, out test);
if (result)
{
Console.WriteLine("Sucess");
}
else
{
if (value == null) value = "";
Console.WriteLine("Failure");
}
...
Does Internet Explorer 8 support HTML 5?
... var div = document.createElement('div'); div.innerHTML = '<section>test</section>'; We end up with div.childNodes.length = 2. I ran into the problem using jQuery and have been trying to figure out what's going on in IE.
– Nick Spacek
Feb 23 '10 a...
How to change string into QString?
...ng str("hello !");
qDebug() << QVariant(str.c_str()).toString();
int test = 10;
double titi = 5.42;
qDebug() << QVariant(test).toString();
qDebug() << QVariant(titi).toString();
qDebug() << QVariant(titi).toInt();
output
"hello !"
"10"
"5.42"
5
...
How can I check for NaN values?
...
The usual way to test for a NaN is to see if it's equal to itself:
def isNaN(num):
return num != num
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Why does the jquery change event not trigger when I set the value of a select using val()?
...x up with default change event you can provide your custom event
$('input.test').on('value_changed', function(e){
console.log('value changed to '+$(this).val());
});
to trigger the event on value set, you can do
$('input.test').val('I am a new value').trigger('value_changed');
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How can a string be initialized using “ ”?
...eral.
But you should keep in mind the string equality.
Here a short JUnit test to demonstrate what I mean.
@Test
public void stringTest() {
// a string literal and a string object created
// with the same literal are equal
assertEquals("string", new String("string"));...