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Best way to check if a Data Table has a null value in it
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Try comparing the value of the column to the DBNull.Value value to filter and manage null values in whatever way you see fit.
foreach(DataRow row in table.Rows)
{
object value = row["ColumnName"];
if (value == DBNull.Value)
// do something
else
// do something else
}
...
Using switch statement with a range of value in each case?
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This works great and is simple. Also if you want to select numbers not in the range all you need is if(!isBetween... , good job.
– a54studio
Jul 20 '13 at 13:43
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Is it possible to delete an object's property in PHP?
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unset($a->new_property);
This works for array elements, variables, and object attributes.
Example:
$a = new stdClass();
$a->new_property = 'foo';
var_export($a); // -> stdClass::__set_state(array('new_property' => 'foo'))
unset($a->new_property);
var_export($a); // -> st...
Multiline bash commands in makefile
...e a very comfortable way to compile my project via a few lines of bash commands. But now I need to compile it via makefile. Considering, that every command is run in its own shell, my question is what is the best way to run multi-line bash command, depended on each other, in makefile?
For example,...
No “pull” in Git Gui?
How can I make a pull using Git GUI tool? It seems there is no pull command anywhere.
3 Answers
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Why use symbols as hash keys in Ruby?
... basically "immutable strings" .. that means that they can not be changed, and it implies that the same symbol when referenced many times throughout your source code, is always stored as the same entity, e.g. has the same object id.
Strings on the other hand are mutable, they can be changed anytim...
Difference between a clickable ImageView and ImageButton
...utton.onSetAlpha() method always returns false, scaleType is set to center and it's always inflated as focusable.
Here's ImageButton's default style:
<style name="Widget.ImageButton">
<item name="android:focusable">true</item>
<item name="android:clickable">true&...
Path to MSBuild
...\MSBuild\ToolsVersions\4.0
may be what you're after; fire up regedit.exe and have a look.
Query via command line (per Nikolay Botev)
reg.exe query "HKLM\SOFTWARE\Microsoft\MSBuild\ToolsVersions\4.0" /v MSBuildToolsPath
Query via PowerShell (per MovGP0)
dir HKLM:\SOFTWARE\Microsoft\MSBuild\Too...
Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
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One little question: Why both the label and the input are wrapped ? How Rails decide what to wrap ?
– Misha Moroshko
Mar 11 '11 at 2:03
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Where to find “Microsoft.VisualStudio.TestTools.UnitTesting” missing dll?
...rofessional or above; .NET Framework 4.0).
or right click on your project and select: Add Reference... > .NET:
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