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What's the difference between lists and tuples?
...and tuple
Literal
someTuple = (1,2)
someList = [1,2]
Size
a = tuple(range(1000))
b = list(range(1000))
a.__sizeof__() # 8024
b.__sizeof__() # 9088
Due to the smaller size of a tuple operation, it becomes a bit faster, but not that much to mention about until you have a huge number of eleme...
HTML for the Pause symbol in audio and video control
... 13.0 (update 2020) provides the Miscellaneous Technical glyphs in the HEX range 2300–23FF
Miscellaneous Technical
Given the extensive Unicode 13.0 documentation, some of the glyphs we can associate to common Media control symbols would be as following:
Keyboard and UI symbols
23CF ...
How to generate a random int in C?
...actice to use the % operator in conjunction with rand() to get a different range (though bear in mind that this throws off the uniformity somewhat). For example:
/* random int between 0 and 19 */
int r = rand() % 20;
If you really care about uniformity you can do something like this:
/* Returns ...
Convert NSData to String?
...h the NSData may contain any byte value, including those outside the UTF-8 range?
– Maarten Bodewes
Aug 6 '13 at 16:20
2
...
Multiple Updates in MySQL
...);
$DoQuery('INSERT INTO '.$TableName.' (i2) VALUES ('.implode('), (', range(2, $NumRows+1)).')');
if($TestNum==0)
{
$TestName='Transaction';
$Start=microtime(true);
$DoQuery('START TRANSACTION');
for($i=1;$i<=$NumRows;$i++)
$DoQuery('UPDAT...
Plot a legend outside of the plotting area in base graphics?
...r=c(5.1, 4.1, 4.1, 8.1), xpd=TRUE)
# Plot both groups
plot(y ~ x, A, ylim=range(c(A$y, B$y)), xlim=range(c(A$x, B$x)), pch=1,
main="Scatter plot of two groups")
points(y ~ x, B, pch=3)
# Add legend to top right, outside plot region
legend("topright", inset=c(-0.2,0), legend=c("A","B...
Why is it string.join(list) instead of list.join(string)?
...port timeit
>>> min(timeit.repeat(lambda: ''.join(str(i) for i in range(10) if i)))
3.839168446022086
>>> min(timeit.repeat(lambda: ''.join([str(i) for i in range(10) if i])))
3.339879313018173
Nevertheless, the str.join operation is still semantically a "string" operation, so it...
Sorting Python list based on the length of the string
... of strings based on length.
def lensort(a):
n = len(a)
for i in range(n):
for j in range(i+1,n):
if len(a[i]) > len(a[j]):
temp = a[i]
a[i] = a[j]
a[j] = temp
return a
print lensort(["hello","bye","good"])
...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...in the form: {r: XXX, g: XXX, b: XXX, a: X.XXX}. Where .r, .g, and .b have range 0 to 255. And when there is no alpha: .a is -1. Otherwise: .a has range 0.000 to 1.000.
For RGB output, it outputs rgba() over rgb() when a color with an alpha channel was passed into c0 (from) and/or c1 (to).
Minor Err...
How to check if a value exists in an array in Ruby
...se method include? exists, for all Enumerables including Array, Hash, Set, Range:
['Cat', 'Dog', 'Bird'].include?('Unicorn') # => false
Note that if you have many values in your array, they will all be checked one after the other (i.e. O(n)), while that lookup for a hash will be constant tim...