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Why does z-index not work?
...line blocks, except that order-modified document order is used in place of raw
document order, and z-index values other than auto create a stacking context even if position is static.
5.4. Z-axis Ordering: the z-index property
The painting order of grid items is exactly the same as inli...
Concatenating two lists - difference between '+=' and extend()
...ng code a few times (for Python 3):
import time
def test():
x = list(range(10000000))
y = list(range(10000000))
z = list(range(10000000))
# INPLACE_ADD
t0 = time.process_time()
z += x
t_inplace_add = time.process_time() - t0
# ADD
t0 = time.process_time()
...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
... The first point glosses over the fact that MessagePack has raw bytes capability which cannot be represented in JSON. So its just the same as BSON in that regard...
– user172783
Sep 2 '11 at 2:40
...
Double Iteration in List Comprehension
... iterators may seem counter-intuitive.
Take for example: [str(x) for i in range(3) for x in foo(i)]
Let's decompose it:
def foo(i):
return i, i + 0.5
[str(x)
for i in range(3)
for x in foo(i)
]
# is same as
for i in range(3):
for x in foo(i):
yield str(x)
...
When should I use the “strictfp” keyword in java?
...
leeway is granted for an
implementation to use an extended
exponent range to represent
intermediate results; the net effect,
roughly speaking, is that a
calculation might produce "the correct
answer" in situations where exclusive
use of the float value set or double
value set migh...
How can I detect if a file is binary (non-text) in python?
...1) behavior:
>>> textchars = bytearray({7,8,9,10,12,13,27} | set(range(0x20, 0x100)) - {0x7f})
>>> is_binary_string = lambda bytes: bool(bytes.translate(None, textchars))
Example:
>>> is_binary_string(open('/usr/bin/python', 'rb').read(1024))
True
>>> is_binar...
How can I cast int to enum?
...
Just cast it:
MyEnum e = (MyEnum)3;
You can check if it's in range using Enum.IsDefined:
if (Enum.IsDefined(typeof(MyEnum), 3)) { ... }
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Most efficient way to reverse a numpy array
... ],
labels=["a[::-1]", "ascontiguousarray(a[::-1])", "fliplr"],
n_range=[2 ** k for k in range(25)],
xlabel="len(a)",
logx=True,
logy=True,
)
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How do I capture the output into a variable from an external process in PowerShell?
...hen communicating with external programs. There is generally no concept of raw byte data in a PowerShell pipeline. If you want raw byte data returned from an external program, you must shell out to cmd.exe /c (Windows) or sh -c (Unix), save to a file there, then read that file in PowerShell. See thi...
How do I get indices of N maximum values in a NumPy array?
...t;>> a = numpy.array([1, 3, 2, 4, 5])
>>> heapq.nlargest(3, range(len(a)), a.take)
[4, 3, 1]
For regular Python lists:
>>> a = [1, 3, 2, 4, 5]
>>> heapq.nlargest(3, range(len(a)), a.__getitem__)
[4, 3, 1]
If you use Python 2, use xrange instead of range.
Source...