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How do I write a for loop in bash
... can use the seq command to generate a list of numbers for you: (from 1 to 100 for example)
seq 1 100
and use it in the FOR loop:
for n in $(seq 1 100)
do
doSomething($n)
done
Note the $(...) syntax. It's a bash behaviour, it allows you to pass the output from one command (in our case from s...
What is the difference between Amazon SNS and Amazon SQS?
... enables batch processing. Each batch can contain up to 10 messages, so if 100 messages arrive at once in your SQS queue, then 10 Lambda functions will spin up (considering the default auto-scaling behaviour for Lambda) and they'll process these 100 messages (keep in mind this is the happy path as i...
Can you determine if Chrome is in incognito mode via a script?
...ole.log("check failed?");
} else {
fs(window.TEMPORARY,
100,
console.log.bind(console, "not in incognito mode"),
console.log.bind(console, "incognito mode"));
}
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|...
Filter dict to contain only certain keys?
...
Code 1:
dict = { key: key * 10 for key in range(0, 100) }
d1 = {}
for key, value in dict.items():
if key % 2 == 0:
d1[key] = value
Code 2:
dict = { key: key * 10 for key in range(0, 100) }
d2 = {key: value for key, value in dict.items() if key % 2 == 0}
Code ...
LINQPad [extension] methods [closed]
....ProgressBar("Analyzing data");
pb.Dump();
for (int index = 0; index <= 100; index++)
{
pb.Percent = index;
Thread.Sleep(100);
}
share
|
improve this answer
|
fol...
How to sort Map values by key in Java?
...sert an element will go from O(1) to O(Log(N)).
In a HashMap, moving from 1000 items to 10,000 doesn't really affect your time to lookup an element, but for a TreeMap the lookup time will be about 3 times slower (assuming Log2). Moving from 1000 to 100,000 will be about 6 times slower for every el...
What is declarative programming? [closed]
...e.
In CSS (used to style HTML pages), if you want an image element to be 100 pixels high and 100 pixels wide, you simply "declare" that that's what you want as follows:
#myImageId {
height: 100px;
width: 100px;
}
You can consider CSS a declarative "style sheet" language.
The browser engine tha...
Numpy first occurrence of value greater than existing value
...rst occurrence are returned.") and doesn't save another list.
In [2]: N = 10000
In [3]: aa = np.arange(-N,N)
In [4]: timeit np.argmax(aa>N/2)
100000 loops, best of 3: 52.3 us per loop
In [5]: timeit np.where(aa>N/2)[0][0]
10000 loops, best of 3: 141 us per loop
In [6]: timeit np.nonzero(a...
How to round to 2 decimals with Python?
...er up to a certain decimal place?
import math
v = 2.357
print(math.ceil(v*100)/100) # -> 2.36
print(math.floor(v*100)/100) # -> 2.35
or:
from math import floor, ceil
def roundDown(n, d=8):
d = int('1' + ('0' * d))
return floor(n * d) / d
def roundUp(n, d=8):
d = int('1' + (...
Cannot create an array of LinkedLists in Java…?
...
This implementation is outrageously slow. Getting the [1000][2000] element (nodeLists.get(1000).get(2000)) will make LinkedList iterate 3000 times! Avoid LinkedList if anyone may be indexing into it. ArrayList will index faster, but Fredrik's solution is better overall.
...