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max value of integer
In C, the integer (for 32 bit machine) is 32 bits, and it ranges from -32,768 to +32,767.
In Java, the integer(long) is also 32 bits, but ranges from -2,147,483,648 to +2,147,483,647.
...
Initializing a list to a known number of elements in Python [duplicate]
...o'); now inspect a[1], and you will be shocked. In contrast a=[[] for k in range(2)] works fine.
– Joachim W
Aug 12 '13 at 21:40
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OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可以通过pNMHDR或者pLVKeyDow访问通告消息结构体。
ON_NOTIFY_RANGE
如果你需要处理一组控件的同一个WM_NOTIFY消息，你可使用ON_NOTIFY_RANGE而不是ON_NOTIFY。例如，你有一组按钮，想让它们对某一通告消息执行相同的动作。
When you use ON_NO...
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()
...
Python Progress Bar
...("\b" * (toolbar_width+1)) # return to start of line, after '['
for i in xrange(toolbar_width):
time.sleep(0.1) # do real work here
# update the bar
sys.stdout.write("-")
sys.stdout.flush()
sys.stdout.write("]\n") # this ends the progress bar
Note: progressbar2 is a fork of progr...
What is an unsigned char?
...s as numbers, use:
signed char, which gives you at least the -127 to 127 range. (-128 to 127 is common)
unsigned char, which gives you at least the 0 to 255 range.
"At least", because the C++ standard only gives the minimum range of values that each numeric type is required to cover. sizeof (cha...
How to retry after exception?
I have a loop starting with for i in range(0, 100) . Normally it runs correctly, but sometimes it fails due to network conditions. Currently I have it set so that on failure, it will continue in the except clause (continue on to the next number for i ).
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How to measure time taken between lines of code in python?
...# your code here with time.sleep(10) and got 0.0 seconds. Adding for i in range(10000):/pass produced the same results. Under any circumstances I tried, time.process_time() always returns the same number. I got expected results using time.perf_counter() though
– biscuit314
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How to make URL/Phone-clickable UILabel?
...y 21 '12 at 18:46
Sameera ChathurangaSameera Chathuranga
3,41611 gold badge2424 silver badges4646 bronze badges
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How to generate random number with the specific length in python
...r of digits:
from random import randint
def random_with_N_digits(n):
range_start = 10**(n-1)
range_end = (10**n)-1
return randint(range_start, range_end)
print random_with_N_digits(2)
print random_with_N_digits(3)
print random_with_N_digits(4)
Output:
33
124
5127
...