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How can I get the sha1 hash of a string in node.js?
...
Obligatory: SHA1 is broken, you can compute SHA1 collisions for 45,000 USD. You should use sha256:
var getSHA256ofJSON = function(input){
return crypto.createHash('sha256').update(JSON.stringify(input)).digest('hex')
}
To answer your question and make a SHA1 hash:
const INSECURE_ALG...
Replace a value if null or undefined in JavaScript
...at this doesn't work if 0 is a valid value of i.
– jt000
Feb 1 '15 at 17:40
14
If anything falsey...
Google Maps JS API v3 - Simple Multiple Marker Example
...ake it unique. This example will be very helpful if you want to test 500, 1000, xxx markers and performance.
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List comprehension on a nested list?
...ke to keep elements per list to be 10 and vary number of lists from 10-100,000
>>> python -m timeit "[list(map(float,k)) for k in [list(range(0,10))]*10]"
>>> 100000 loops, best of 3: 15.2 usec per loop
>>> python -m timeit "[[float(y) for y in x] for x in [list(range(...
Why no ICloneable?
... 'real world' that also does something other than implement it (in the ~60,000 apps that we have access to).
Now if you would just like to enforce a pattern that you want your 'cloneable' objects to implement, that's a completely fine usage - and go ahead. You can also decide on exactly what "cloni...
How do I get currency exchange rates via an API such as Google Finance? [closed]
...%22USDCHF%22%29
Open Source Exchange Rates API
Free for personal use (1000 hits per month)
Changing "base" (from "USD") is not allowed in Free account
Requires registration.
Request: http://openexchangerates.org/latest.json
Response:
<!-- language: lang-js -->
{
"disclaimer":...
Fastest way to replace NAs in a large data.table
...) # v2.8.2
set.seed(1)
dt1 = create_dt(2e5, 200, 0.1)
dim(dt1)
[1] 200000 200 # more columns than Ramnath's answer which had 5 not 200
f_andrie = function(dt) remove_na(dt)
f_gdata = function(dt, un = 0) gdata::NAToUnknown(dt, un)
f_dowle = function(dt) { # see EDIT later for mor...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %timeit pd.Series(df.A.values,index=df.B).to_dict()
1000 loops, best of 3: 987 us per loop
...
String output: format or concat in C#?
...ded the result by some iterations was wrong. See what happens if you have 1000 milliseconds and 100 milliseconds. In both situations, you will get 0 ms after dividing it by 1000000.
Stopwatch s = new Stopwatch();
var p = new { FirstName = "Bill", LastName = "Gates" };
int n = 1000000;
long fElaps...
C# switch statement limitations - why?
...le use if they aren't:
case 10: blah; break;
case 200: blah; break;
case 3000: blah; break;
(You'd need a table ~3000 entries in size, with only 3 slots used)
With non-adjacent expressions, the compiler may start to perform linear if-else-if-else checks.
With larger non- adjacent expression set...