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Is there any advantage of using map over unordered_map in case of trivial keys?
... x86_64 Linux system
$ ./time_hash_map
TR1 UNORDERED_MAP (4 byte objects, 10000000 iterations):
map_grow 126.1 ns (27427396 hashes, 40000000 copies) 290.9 MB
map_predict/grow 67.4 ns (10000000 hashes, 40000000 copies) 232.8 MB
map_replace 22.3 ns (37427396 hashes,...
Difference between dict.clear() and assigning {} in Python
... the dict for many times.
import timeit
p1 = '''
d = {}
for i in xrange(1000):
d[i] = i * i
for j in xrange(100):
d = {}
for i in xrange(1000):
d[i] = i * i
'''
p2 = '''
d = {}
for i in xrange(1000):
d[i] = i * i
for j in xrange(100):
d.clear()
for i in xrange(10...
Why does this method print 4?
...arge.
Let's look at this with some examples.
Example 1: Suppose
X = 100
M = 1
R = 2
P = 1
Then C = floor((X-M)/R) = 49, and cnt = ceiling((P - (X - M - C*R))/R) = 0.
Example 2: Suppose that
X = 100
M = 1
R = 5
P = 12
Then C = 19, and cnt = 2.
Example 3: Suppose that
X = 101
M = 1
R...
How to split the name string in mysql?
... mysql pro skills. I have ave completely removed PHP processing and turned 100 lines of logic in a one single query. This is amazing!
– TeaCupApp
Feb 4 '14 at 3:35
1
...
Get decimal portion of a number with JavaScript
... this was returning a non exact number like I expected to get 0.80 from 100.80, not 0.79999... I solved this by adding decimal.toFixed(2)
– Luis Febro
Feb 4 at 3:21
...
Converting an array of objects to ActiveRecord::Relation
...ord::StatementInvalid (PG::TooManyArguments: ERROR: cannot pass more than 100 arguments to a function) This workaround can not stand over 100 arguments to a function, thus, it works with relations of total length up to 100, ids like 112 and 12 won't be separated from each other.
...
How to delete a whole folder and content?
...matter is DCIM is not deleted as long as the photos are...so even deleting 100MEDIA the folder within this would do the job
– Beginner
Feb 9 '11 at 11:00
1
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tag in Twitter Bootstrap not functioning correctly?
...
<div class="w-100"><hr></div>
– drzymala
Oct 11 '18 at 20:22
...
What does ':' (colon) do in JavaScript?
...
And also, a colon can be used to label a statement. for example
var i = 100, j = 100;
outerloop:
while(i>0) {
while(j>0) {
j++
if(j>50) {
break outerloop;
}
}
i++
}
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...
Node.js: printing to console without a trailing newline?
...ardcoded escape sequences due to their own FUD, but almost everyone uses VT100 now, so compatibility is not really an issue any more. The functionality you are referring to is "alternate screen" behavior. A basic intro can be found in man console_codes (on Linux or online) and my favorite reference ...