大约有 44,000 项符合查询结果（耗时：0.0507秒） [XML]
How can I get a count of the total number of digits in a number?
...
Without converting to a string you could try:
Math.Ceiling(Math.Log10(n));
Correction following ysap's comment:
Math.Floor(Math.Log10(n) + 1);
share
|
improve this answer
|
...
Generate a random number in the range 1 - 10
... way to tell pg's random() function to get me only numbers between 1 and 10?
7 Answers
...
Length of an integer in Python
...
answered Feb 3 '10 at 5:00
GeekTantraGeekTantra
9,33355 gold badges3535 silver badges4747 bronze badges
...
How do I efficiently iterate over each entry in a Java Map?
...
ScArcher2ScArcher2
75.5k3838 gold badges109109 silver badges155155 bronze badges
93
...
What are the differences between json and simplejson Python modules?
...chmark:
import json
import simplejson
from timeit import repeat
NUMBER = 100000
REPEAT = 10
def compare_json_and_simplejson(data):
"""Compare json and simplejson - dumps and loads"""
compare_json_and_simplejson.data = data
compare_json_and_simplejson.dump = json.dumps(data)
assert...
List comprehension on a nested list?
...
>>> l = [['40', '20', '10', '30'], ['20', '20', '20', '20', '20', '30', '20'], ['30', '20', '30', '50', '10', '30', '20', '20', '20'], ['100', '100'], ['100', '100', '100', '100', '100'], ['100', '100', '100', '100']]
>>> new_list = [float...
How to get the top 10 values in postgresql?
...For this you can use limit
select *
from scores
order by score desc
limit 10
If performance is important (when is it not ;-) look for an index on score.
Starting with version 8.4, you can also use the standard (SQL:2008) fetch first
select *
from scores
order by score desc
fetch first 10 rows...
How to round up to the nearest 10 (or 100 or X)?
...
If you just want to round up to the nearest power of 10, then just define:
roundUp <- function(x) 10^ceiling(log10(x))
This actually also works when x is a vector:
> roundUp(c(0.0023, 3.99, 10, 1003))
[1] 1e-02 1e+01 1e+01 1e+04
..but if you want to round to a "nice...
JavaScript variables declare outside or inside loop?
...ou've got yourself an accidental global.
In particular:
for (var i; i<100; i++)
do something;
for (var i; i<100; i++)
do something else;
Crockford will recommend you remove the second var (or remove both vars and do var i; above), and jslint will whinge at you for this. But IMO it...