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how to calculate binary search complexity
... formula this would be this:
1 = N / 2x
multiply by 2x:
2x = N
now do the log2:
log2(2x) = log2 N
x * log2(2) = log2 N
x * 1 = log2 N
this means you can divide log N times until you have everything divided. Which means you have to divide log N ("do the bin...
Conda: Installing / upgrading directly from github
...
There's better support for this now through conda-env. You can, for example, now do:
name: sample_env
channels:
dependencies:
- requests
- bokeh>=0.10.0
- pip:
- "--editable=git+https://github.com/pythonforfacebook/facebook-sdk.git@8c0d34...
Why does Javascript getYear() return 108?
...the years since 1900 are counted.
There are potential compatibility issues now that getYear() has been deprecated in favour of getFullYear() - from quirksmode:
To make the matter even more complex, date.getYear() is deprecated nowadays and you should use date.getFullYear(), which, in turn, is not s...
Subtract 7 days from current date
...
use dateByAddingTimeInterval method:
NSDate *now = [NSDate date];
NSDate *sevenDaysAgo = [now dateByAddingTimeInterval:-7*24*60*60];
NSLog(@"7 days ago: %@", sevenDaysAgo);
output:
7 days ago: 2012-04-11 11:35:38 +0000
Hope it helps
...
How to redirect output of an already running process [duplicate]
... ps aux | grep cat
rjc 6760 0.0 0.0 1580 376 pts/5 S+ 15:31 0:00 cat
Now check the file handles it has open:
$ ls -l /proc/6760/fd
total 3
lrwx—— 1 rjc rjc 64 Feb 27 15:32 0 -> /dev/pts/5
l-wx—— 1 rjc rjc 64 Feb 27 15:32 1 -> /tmp/foo1
lrwx—— 1 rjc rjc 64 Feb 27 15:32 2 ->...
MySQL: multiple tables or one table with many columns?
...r if I separate the tables in this manner to improve the performance? I'll now go read about the wiki that you mentioned :)
– Xavier_Ex
Mar 19 '12 at 17:45
...
Dynamically creating keys in a JavaScript associative array
...l = dict["2bob2"];
// Read value of our cool secret key
val = dict[key];
Now let's change values:
// Change the value of fred
dict.fred = "astra";
// The assignment creates and/or replaces key-value pairs
// Change the value of 2bob2
dict["2bob2"] = [1, 2, 3]; // Any legal value can be used
// ...
What is null in Java?
...ify:
Uninitialized state
Termination condition
Non-existing object
An unknown value
How is it represented in the memory?
In Java? None of your concern. And it's best kept that way.
Is null a good thing?
This is now borderline subjective. Some people say that null causes many programme...
IntelliJ: Viewing diff of all changed files between local and a git commit/branch
... answered Apr 4 '18 at 4:17
unknownerrorunknownerror
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Express-js wildcard routing to cover everything under and including a path
...
The connect router has now been removed (https://github.com/senchalabs/connect/issues/262), the author stating that you should use a framework on top of connect (like Express) for routing.
Express currently treats app.get("/foo*") as app.get(/\/fo...