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ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...t /etc/hosts. Assuming the Raspberry has hostname "berry" and ip "172.16.0.100", add one line:
# ip hostname
172.16.0.100 berry
Now: ssh user@berry should work.
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Align image in center and middle within div
...;
display: block;
}
<div id="over" style="position:absolute; width:100%; height:100%">
<img src="http://www.garcard.com/images/garcard_symbol.png">
</div>
JSFiddle
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How can I get the browser's scrollbar sizes?
...dth () {
var inner = document.createElement('p');
inner.style.width = "100%";
inner.style.height = "200px";
var outer = document.createElement('div');
outer.style.position = "absolute";
outer.style.top = "0px";
outer.style.left = "0px";
outer.style.visibility = "hidden";
outer.sty...
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...
How many threads is too many?
...t guess. One suggestion is to make it configurable and initially set it to 100, then release your software to the wild and monitor what happens.
If your thread usage peaks at 3, then 100 is too much. If it remains at 100 for most of the day, bump it up to 200 and see what happens.
You could actual...
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
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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
...
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,...
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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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...