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How to list the contents of a package using YUM?
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To search faster for installed packages, include --installed option. eg $ repoquery -lq --installed time.
– Mohsenme
Mar 5 '14 at 8:06
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How do you round a float to two decimal places in jruby
... I know it does not appear to be the intention of Sam to round the number for the purpose of presenting something like a currency, but be aware that using #round(precision) will not work as intended if you are trying to do this (3.round(2) #=> 3.0, not 3.00). To get this, check out the answer by...
How to convert ActiveRecord results into an array of hashes
...ash and you can convert any ActiveRecord results to an Array with to_a, so for your example :
tasks_records = TaskStoreStatus.all
tasks_records.to_a.map(&:serializable_hash)
And if you want an ugly solution for Rails prior to v2.3
JSON.parse(tasks_records.to_json) # please don't do it
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Getting the object's property name
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i is the name.
for(var name in obj) {
alert(name);
var value = obj[name];
alert(value);
}
So you could do:
seperateObj[i] = myObject[i];
share
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Specifying an Index (Non-Unique Key) Using JPA
...ever need to create and index with two or more columns you may use commas. For example:
@Entity
@Table(name = "company__activity",
indexes = {@Index(name = "i_company_activity", columnList = "activity_id,company_id")})
public class CompanyActivity{
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Python Infinity - Any caveats?
...ar smaller than infinity. Putting infinity into such a place may be useful for the exception handler of your particular application logic, but would be incorrect for Python in general.
– Lutz Prechelt
Mar 30 '16 at 16:08
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error LNK2019: 无法解析的外部符号_socket，该符号在函数 中被引用 - c++1...
1>NetClient.obj : error LNK2019: 无法解析的外部符号 _closesocket@4，该符号在函数 _main 中被引用
1>NetClient.obj : error LNK2019: 无法解析的外部符号 _inet_ntoa@4，该符号在函数 _main 中被引用
1>NetClient.obj : error LNK2019: 无法解析的外部符...
How do I check if a list is empty?
For example, if passed the following:
27 Answers
27
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ReSharper warns: “Static field in generic type”
...his wrong? I would assume that this actually has a static readonly field for each of the possible EnumRouteConstraint<T> that I happen to instance.
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Weak and strong property setter attributes in Objective-C
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You either have ARC on or off for a particular file. If its on you cannot use retain release autorelease etc... Instead you use strong weak for properties or __strong
__weak
for variables (defaults to __strong). Strong is the equivalent to retain, how...