大约有 32,000 项符合查询结果（耗时：0.0448秒） [XML]
Bash Script: count unique lines in file
...wc:
sort ips.txt | uniq | wc -l
awk '!seen[$0]++' ips.txt | wc -l
Awk's arrays are associative so it may run a little faster than sorting.
Generating text file:
$ for i in {1..100000}; do echo $RANDOM; done > random.txt
$ time sort random.txt | uniq | wc -l
31175
real 0m1.193s
user ...
How to use Elasticsearch with MongoDB?
...ongoose.model('Page', new mongoose.Schema({
title: String,
categories: Array
}), 'your_collection_name');
// stream query
var stream = Page.find({
}, {title: 1, _id: 0, categories: 1}).limit(1500000).skip(0).batchSize(500).stream();
elasticbulk.import(stream, {
index: 'my_index_name',
typ...
How can I get a file's size in C? [duplicate]
...
Have you considered not computing the file size and just growing the array if necessary? Here's an example (with error checking ommitted):
#define CHUNK 1024
/* Read the contents of a file into a buffer. Return the size of the file
* and set buf to point to a buffer allocated with malloc...
Is there a way to measure how sorted a list is?
...ckoverflow.com/questions/6523712/… Basically, they amount to sorting the array in order to figure out how many inversions there are.
– Mark Bessey
Jun 8 '13 at 1:54
4
...
pretty-print JSON using JavaScript
...
Better way.
Prettify JSON Array in Javascript
JSON.stringify(jsonobj,null,'\t')
share
|
improve this answer
|
follow
...
What is TypeScript and why would I use it in place of JavaScript? [closed]
...pear. Just create a .d.ts file and include it in the tsconfig.json's files array, so that it is always considered by the TypeScript compiler. In it declare those bits that TypeScript does not know about as type any. Once you've eliminated all errors you can gradually introduce typing to those parts ...
Finding child element of parent pure javascript
...
The children property returns an array of elements, like so:
parent = document.querySelector('.parent');
children = parent.children; // [<div class="child1">]
There are alternatives to querySelector, like document.getElementsByClassName('parent')[0]...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
...cted void onDraw(Canvas canvas) {
// The matrix is stored in a single array, and its treated as follows: [ a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t ]
// When applied to a color [r, g, b, a], the resulting color is computed as (after clamping) ;
// R' = a*R + b*G + c*...
How to negate a method reference predicate
...EmptyStrings = s.filter(notEmpty).count();
Or, if having a collection or array, just use a for-loop which is simple, has less overhead, and *might be **faster:
int notEmpty = 0;
for(String s : list) if(!s.isEmpty()) notEmpty++;
*If you want to know what is faster, then use JMH http://openjdk.ja...
What's the best way of scraping data from a website? [closed]
...ing a bad choice, but with the right libraries it's not too bad. Regex and array/sting manipulation is clumsy but on the plus side it's fast and everywhere.
– pguardiario
Mar 5 '14 at 1:01
...