大约有 3,285 项符合查询结果（耗时：0.0194秒） [XML]
Is there a “null coalescing” operator in JavaScript?
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Good catch. And by the way, that is a fast way of checking NaNs taking advantage of the fact NaN !== NaN. If you would like, you can explain that.
– Isiah Meadows
Aug 22 '15 at 7:47
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data.frame rows to a list
...implemented in R. lapply performs the looping in C, which is significantly faster. This list-of-rows format is actually preferable if you're doing a lot of looping.
– Liz Sander
Dec 21 '15 at 16:54
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How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...et.io
npm install hiredis redis # hiredis to use c binding for redis => FAST :)
Download sample
You can download complete sample from mediafire.
Unzip package
unzip pbsb.zip # can also do via graphical interface if you prefer.
What's inside zip
./app.js
const PORT = 3000;
const HOST = 'l...
Generate random numbers following a normal distribution in C/C++
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If you need speed, then the polar method is faster, though. And the Ziggurat algorithm even more (albeit much more complex to write).
– Joey
Feb 24 '10 at 12:15
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What is N-Tier architecture?
...del served well for decades, and it is the classic 'client-server' model. Fast forward to cloud offerings, where web browsers are the user interface for a broad and physically distributed set of users, and one typically ends up having to add content distribution services, which aren't a part of the...
Invoking a static method using reflection
...ing the method millions of times in some inner loop then iteration will be fast enough
– Tony Eastwood
Sep 16 '13 at 8:32
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Subset of rows containing NA (missing) values in a chosen column of a data frame
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Thanks for your fast answer (this was quick)! Indeed, due to the csv-delivery of the data, the 'NA' are character values and your second statement might be very useful. Can you also clarify your first statement? The use of rowSums() is not c...
Find the files existing in one directory but not in the other [closed]
... in another directory. So the output is quite concise and the script works fast.
#!/usr/bin/env python3
import os, sys
def compare_dirs(d1: "old directory name", d2: "new directory name"):
def print_local(a, msg):
print('DIR ' if a[2] else 'FILE', a[1], msg)
# ensure validity
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JavaScript function to add X months to a date
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This function handles edge cases and is fast:
function addMonthsUTC (date, count) {
if (date && count) {
var m, d = (date = new Date(+date)).getUTCDate()
date.setUTCMonth(date.getUTCMonth() + count, 1)
m = date.getUTCMonth()
date.setUTCD...
Sending an HTTP POST request on iOS
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This "postexample" function is more fast that Response :p @DaanLuttik
– Ronny Morán
Nov 24 '17 at 15:09
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