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What does “all” stand for in a makefile?
...unning just make should do the same as make all.
To achieve 1 all is typically defined as a .PHONY target that depends on the executable(s) that form the entire program:
.PHONY : all
all : executable
To achieve 2 all should either be the first target defined in the make file or be assigned as t...
Best way to check if a Data Table has a null value in it
...Null class
If you want to check if a null value exists in the table you can use this method:
public static bool HasNull(this DataTable table)
{
foreach (DataColumn column in table.Columns)
{
if (table.Rows.OfType<DataRow>().Any(r => r.IsNull(column)))
return ...
Is having an 'OR' in an INNER JOIN condition a bad idea?
...
This kind of JOIN is not optimizable to a HASH JOIN or a MERGE JOIN.
It can be expressed as a concatenation of two resultsets:
SELECT *
FROM maintable m
JOIN othertable o
ON o.parentId = m.id
UNION
SELECT *
FROM maintable m
JOIN othertable o
ON o.id = m.parentId
, each ...
Merge Images Side by Side(Horizontally)
...le).
montage [0-5].png -tile 5x1 -geometry +0+0 out.png
Other examples can be found on Montage Usage page
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How do I use a file grep comparison inside a bash if/else statement?
...ing in comments, names that merely start with "master", etc.
This works because the if takes a command and runs it, and uses the return value of that command to decide how to proceed, with zero meaning true and non-zero meaning false—the same as how other return codes are interpreted by the shell...
How to access test resources in Scala?
...ur example of data.xml being in $SBT_PROJECT_HOME/src/test/resources/, you can access it in a test like so:
import scala.io.Source
// The string argument given to getResource is a path relative to
// the resources directory.
val source = Source.fromURL(getClass.getResource("/data.xml"))
Of cours...
Rails detect if request was AJAX
In my action I wish to only respond with processing if it was called from an AJAX request. How do I check?
5 Answers
...
jQuery: Adding two attributes via the .attr(); method
...inutes, it's not letting me accept it right now.
– Ricardo Zea
Oct 22 '12 at 15:17
Correction: you can change type att...
Generate full SQL script from EF 5 Code First Migrations
...
Just in case someone is looking how to do this in EfCore and ended up here like me, the command is: dotnet ef migrations script. More on documentation: docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/…
...
CocoaPods - use specific pod version
...2.0'
Check 'Get started' at http://cocoapods.org
Once this is done, you can then issue a pod update in the terminal for the change to take place. Of course, this needs to be done from your project's top level folder. If the update does not occur, edit your Podfile.lock file and change the AFNet...