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Why am I getting “undefined reference to sqrt” error even though I include math.h header? [duplicate
...ary must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command:
gcc test.c -o test -lm
The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.
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Differences for a certain folder between git branches [duplicate]
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what do you mean by extracting a certain commiter? retrieve the last commit of this person? To write this diff to a file you juste redirect the output like this ` git diff master..yourbranch path/to/file > filename
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JS strings “+” vs concat method [duplicate]
... (+, +=) instead of this method for perfomance reasons
Also see the link by @Bergi.
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Generating a Random Number between 1 and 10 Java [duplicate]
... get numbers from 0 to 9 in your case. So you've done everything correctly by adding one to that number.
Generally speaking, if you need to generate numbers from min to max (including both), you write
random.nextInt(max - min + 1) + min
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Why aren't my ball (objects) shrinking/disappearing?
...JS fiddle. There are 3 different effects which can be applied to the balls by uncommenting lines 141-146. The 'bounce' effect works as it should, but the 'asplode' effect does nothing. Should I include the 'shrink' function inside the asplode function?
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Oracle 分组后取每组第一条数据 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...下，亲测有效：SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T field1, T Oracle 分组后取每组第一条数据的SQL如下，亲测有效：
SELECT *
FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T.field1, T.field2 ORDER BY T.field3 DESC) rowNo, T.*
FROM table_...
MongoDB sort排序、index索引教程 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "https://www.tsingfun.com", "tags" : [ "php" ], "likes" : 200 }
{ "_id" : ObjectId("56066549ade2f21f36b0313b"), "title" : "Java 教程", "description" : "Java 是由Sun Microsystems公司于1995...
How do I automatically sort a has_many relationship in Rails?
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end
Or, if you want a simple, non-database method of sorting, use sort_by:
article.comments.sort_by &:created_at
Collecting this with the ActiveRecord-added methods of ordering:
article.comments.find(:all, :order => 'created_at DESC')
article.comments.all(:order => 'created_at DESC...
A proper wrapper for console.log with correct line number?
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@A.B.Carroll You could console.log twice by binding a custom log() function containing two calls to console.log, however the line numbers would reflect the line that console.log actually resides on, not where debug.log is called. However, you could do things like ad...
Nested Models in Backbone.js, how to approach
... note that you are actually invoking the parse method in your nested model by calling:
new embeddedClass(embeddedData, {parse:true});
You can define as many nested models in the model field as you need.
Of course, if you want to go as far as saving the nested model in its own table. This wouldn'...