大约有 48,000 项符合查询结果（耗时：0.0558秒） [XML]
NodeJS: Saving a base64-encoded image to disk
My Express app is receiving a base64-encoded PNG from the browser (generated from canvas with toDataURL() ) and writing it to a file. But the file isn't a valid image file, and the "file" utility simply identifies it as "data".
...
Difference between Pig and Hive? Why have both? [closed]
My background - 4 weeks old in the Hadoop world. Dabbled a bit in Hive, Pig and Hadoop using Cloudera's Hadoop VM. Have read Google's paper on Map-Reduce and GFS ( PDF link ).
...
A generic error occurred in GDI+, JPEG Image to MemoryStream
...
34 Answers
34
Active
...
Google Maps API v3: How to remove all markers?
...
488
Simply do the following:
I. Declare a global variable:
var markersArray = [];
II. Define a...
How to clone a Date object?
...r date = new Date();
var copiedDate = new Date(date.getTime());
In Safari 4, you can also write:
var date = new Date();
var copiedDate = new Date(date);
...but I'm not sure whether this works in other browsers. (It seems to work in IE8).
...
What are the rules for JavaScript's automatic semicolon insertion (ASI)?
...
466
First of all you should know which statements are affected by the automatic semicolon insertio...
Which version of MVC am I using?
...d it for some reason, feeling a little dumb. How do I know? I'm using .net 4 with VS2010.
9 Answers
...
Why there is no ConcurrentHashSet against ConcurrentHashMap
...
|
edited Jan 4 '16 at 21:11
answered Aug 9 '11 at 7:17
...
Postgresql - change the size of a varchar column to lower length
...ts columns is a varchar(255) and I would like to resize it to a varchar(40) .
Basically, I would like to change my column by running the following command:
...
What's the best way to convert a number to a string in JavaScript? [closed]
...
like this:
var foo = 45;
var bar = '' + foo;
Actually, even though I typically do it like this for simple convenience, over 1,000s of iterations it appears for raw speed there is an advantage for .toString()
See Performance tests here (not by ...