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How do I get the first element from an IEnumerable in .net?
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edited May 23 '17 at 11:47
Community♦
111 silver badge
answered Jan 30 '09 at 21:13
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How to convert JSON to CSV format and store in a variable
...n to csv is to use the map function without any framework:
var json = json3.items
var fields = Object.keys(json[0])
var replacer = function(key, value) { return value === null ? '' : value }
var csv = json.map(function(row){
return fields.map(function(fieldName){
return JSON.stringify(row[fi...
What is the --save option for npm install?
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answered Oct 24 '13 at 23:56
voithosvoithos
56.2k99 gold badges8686 silver badges110110 bronze badges
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linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...点。
1．共享网络
2．加快访问速度，节约通信带宽
3．防止内部主机受到攻击
4．限制用户访问，完善网络管理
原理：
① 客户端A向代理服务器提出访问Internet的请求。
② 代理服务器接受到请求后，首先与访问控制列...
Press alt + numeric in bash and you get (arg [numeric]) what is that?
...nswered Feb 18 '09 at 18:00
user3850user3850
2
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Get file size, image width and height before upload
...g the Blob object
<img src="blob:null/026cceb9-edr4-4281-babb-b56cbf759a3d">
const EL_browse = document.getElementById('browse');
const EL_preview = document.getElementById('preview');
const readImage = file => {
if ( !(/^image\/(png|jpe?g|gif)$/).test(file.type) )
return...
How do I measure the execution time of JavaScript code with callbacks?
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Dave McClelland
3,18611 gold badge2525 silver badges4242 bronze badges
answered Aug 25 '13 at 9:39
user2362662user236...
HTML5 check if audio is playing?
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edited Feb 13 at 12:30
Edric
15.5k99 gold badges5656 silver badges7171 bronze badges
answe...
JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
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MultiplyByZer0
3,73333 gold badges2727 silver badges4646 bronze badges
answered Jan 23 '13 at 12:51
Rigg802Rigg802
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Dictionary vs Object - which is more efficient and why?
...me python test_dict.py && time python test_slots.py
real 0m27.398s (using 'normal' object)
real 0m16.747s (using __dict__)
real 0m11.777s (using __slots__)
Using CPython 2.6.2, including the named tuple test:
$ python --version
Python 2.6.2
$ time python test_obj.py && ti...