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Does Ruby regular expression have a not match operator like “!~” in Perl?
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Yes: !~ works just fine – you probably thought it wouldn’t because it’s missing from the...
ActiveRecord: size vs count
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edited Jul 10 '12 at 22:15
Jo Liss
22.5k1414 gold badges101101 silver badges150150 bronze badges
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JSON.parse unexpected character error
...e not parsing a string, you're parsing an already-parsed object :)
var obj1 = JSON.parse('{"creditBalance":0,...,"starStatus":false}');
// ^ ^
// if you want to parse, the input should be a string
var obj2 = {"creditBa...
理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...B, anon-rss:3744kB, file-rss:80kB
httpd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
httpd cpuset=/ mems_allowed=0
Pid: 8911, comm: httpd Not tainted 2.6.32-279.1.1.el6.i686 #1
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21556 total pagecache pages
21049 pages in swap cache
Swap cache stats: add ...
How to determine the number of days in a month in SQL Server?
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You can use the following with the first day of the specified month:
datediff(day, @date, dat...
Set operations (union, intersection) on Swift array?
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Yes, Swift has the Set class.
let array1 = ["a", "b", "c"]
let array2 = ["a", "b", "d"]
let ...
Passing a URL with brackets to curl
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edited Jul 2 '19 at 20:14
moveson
4,45011 gold badge99 silver badges3131 bronze badges
answe...
parseInt vs unary plus, when to use which?
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175
#Please see this answer for a more complete set of cases
Well, here are a few differences I...
How to merge 2 JSON objects from 2 files using jq?
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Since 1.4 this is now possible with the * operator. When given two objects, it will merge them...
Creating Multifield Indexes in Mongoose / MongoDB
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You call the index method on your Schema object to do that as shown here. For your case it wo...