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Python: fastest way to create a list of n lists
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105
The probably only way which is marginally faster than
d = [[] for x in xrange(n)]
is
from ...
CPU Privilege Rings: Why rings 1 and 2 aren't used?
...art of the modern protection model) only has a concept of privileged (ring 0,1,2) and unprivileged, the benefit to rings 1 and 2 were diminished greatly.
The intent by Intel in having rings 1 and 2 is for the OS to put device drivers at that level, so they are privileged, but somewhat separated fro...
JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?
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110
What I think is that somebody realized that the queryForInt/Long methods has confusing semantics...
How to avoid scientific notation for large numbers in JavaScript?
...tific notation if the number is >= 1e21 and has a maximum precision of 20. Other than that, you can roll your own, but it will be messy.
function toFixed(x) {
if (Math.abs(x) < 1.0) {
var e = parseInt(x.toString().split('e-')[1]);
if (e) {
x *= Math.pow(10,e-1);
x = ...
How to remove all leading zeroes in a string
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10 Answers
10
Active
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Selecting with complex criteria from pandas.DataFrame
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406
Sure! Setup:
>>> import pandas as pd
>>> from random import randint
>>...
Crontab Day of the Week syntax
In crontab does the Day of the Week field run from 0 - 6 or 1 -7 ?
3 Answers
3
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Can I add jars to maven 2 build classpath without installing them?
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605
Problems of popular approaches
Most of the answers you'll find around the internet will suggest...
Python: Get the first character of the first string in a list?
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You almost had it right. The simplest way is
mylist[0][0] # get the first character from the first item in the list
but
mylist[0][:1] # get up to the first character in the first item in the list
would also work.
You want to end after the first character (character z...
Programmatically obtain the Android API level of a device?
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107
You can obtain API level programatically by the system constant (Build.VERSION.SDK_INT). For ex...