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What are some compelling use cases for dependent method types?
...")
def testDuplicates(r : Resource) = assert(r.duplicates(r))
}
trait FileManager extends ResourceManager {
type Resource <: File
trait File extends BasicResource {
def local : Boolean
}
override def create : Resource
}
class NetworkFileManager extends FileManager {
type Resou...
How to redirect the output of an application in background to /dev/null
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If this is the last command in a bash file, one thing that I noticed is that it leaves the command console that called the file without a prompt.
– Dennis
Mar 10 '13 at 17:28
...
Create table in SQLite only if it doesn't exist already
...routine thing of connections and cursors
conn = sqlite3.connect(db_file, timeout=1000)
cursor = conn.cursor()
# get the count of tables with the name
tablename = 'KABOOM'
cursor.execute("SELECT count(name) FROM sqlite_master WHERE type='table' AND name=...
Send string to stdin
...n)
or you can read as
while read line
do
echo =$line=
done < some_file
or simply
echo something | read param
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Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
...t error.
When you push to heroku you need to configure the environment.rb file with the heroku subdomain:
config.action_mailer.default_url_options = { :host => 'yourapp.heroku.com' }
Depending upon version, this should go in production.rb, not environment.rb.
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PreparedStatement IN clause alternatives?
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Sometimes SQL statements are loaded at runtime (e.g., from a properties file) but require a variable number of parameters. In such cases, first define the query:
query=SELECT * FROM table t WHERE t.column IN (?)
Next, load the query. Then determine the number of parameters prior to running it....
What is meant by “managed” vs “unmanaged” resources in .NET?
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Adding a bit more clarification: SqlConnection (or FileStream, etc) are managed resources which internally use unmanaged resources which GC is unaware of.
– jimvfr
Jan 17 '13 at 2:21
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Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin
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With the code as is, you download twice the file over the network: once in the downloadTaks, once with the Data(cntentsOf:). You must user location in place of url because the download task simply actually download over the network and write the data to a temporary fil...
Is there a “default” MIME type?
... over on your end which knows what to do with them". Sometimes there is a file name which helps convey to the recipient what to do with the data.
"unknown" doesn't really add anything over this, except to confuse clients who don't support random unofficial MIME types. Ditto for application/binary...
REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...参数－R
7.2编辑环境变量
编辑文件 vim /home/oracle/.bash_profile，添加如下行：
ORACLE_BASE=/mnt/app/oracle
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1
ORACLE_SID=orcl
LD_LIBRARY_PATH=$ORACLE_HOME/lib
PATH=$PATH:$ORACLE_HOME/bin:$HOME/bin
export NLS_LANG=American_Am...