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Fastest way to replace NAs in a large data.table
...ystem.time(res2 <- f_andrie(dt1))
User System verstrichen
2.95 0.33 3.28
system.time(f_dowle2(dt2))
User System verstrichen
0.78 0.00 0.78
system.time(f_dowle3(dt3))
User System verstrichen
0.17 0.00 0.17
system.time...
How can javascript upload a blob?
...actly is in upload.php. So here you go:
(tested only in Chrome 28.0.1500.95)
// javascript function that uploads a blob to upload.php
function uploadBlob(){
// create a blob here for testing
var blob = new Blob(["i am a blob"]);
//var blob = yourAudioBlobCapturedFromWebAudioAPI;// for...
What does 'const static' mean in C and C++?
...
MottiMotti
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...
How to create a multi-tenant database with shared table structures?
...
95
However there are some companies of
course who fear that their data might
be compromised...
Purpose of Django setting ‘SECRET_KEY’
...ckled + settings.SECRET_KEY).hexdigest()
contrib/sessions/backends/base.py:95: if md5_constructor(pickled + settings.SECRET_KEY).hexdigest() != tamper_check:
contrib/sessions/backends/base.py:134: # Use settings.SECRET_KEY as added salt.
contrib/sessions/backends/base.py:143: ...
Mozilla PDF.js：PDF在线预览 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以通过参数传值方式打开PDF的，我用的版本是39.0.2171.95 m
回答网友提问 2015-7-28
因为好多人问能不能显示中文的问题，我总结大致分为两类问题：
1.能否显示中文？2.能否读取远程服务器上的PDF（包括中文文件名）
第一...
Simplest way to detect a mobile device in PHP
...
95
I wrote this script to detect a mobile browser in PHP.
The code detects a user based on the us...
Erasing elements from a vector
...
MottiMotti
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Quicksort: Choosing the pivot
...1
KipKip
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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
矿石漏
5.26
5.19
4.21
4.00
2.95
2.74
2.46
1.90
0.64
1.27
倒装场Ⅰ
1.90
0.99
1.90
1.13
1.27
2.25
1.48
2.04
3.09
3.51
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