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Best way to check if a Data Table has a null value in it
... || dr1["Columnname"].ToString() == ""
select Columnname);
Here Replace Columnname with table column name and "" your search item in above code we looking null value.
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How do I view an older version of an SVN file?
...itch to another branch/tag/revision. Besides the revision field, you click select, and you'll see all the versions of that file.
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Two versions of python on linux. how to make 2.7 the default
...n in /usr/bin, and may have scripts that depend on this being present, and selected by #! /usr/bin/env python. You can usually get away with running Python 2.6 scripts in 2.7, but do you want to risk it?
On top of that, monkeying with /usr/bin can break your package manager's ability to manage pack...
How do I use a file grep comparison inside a bash if/else statement?
...m grep --help, but also see man grep:
Exit status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specif...
How can I exclude directories from grep -R?
...n regarding syntax and usage see
The GNU man page for File and Directory Selection
A related StackOverflow answer Use grep --exclude/--include syntax to not grep through certain files
For older GNU Greps and POSIX Grep, use find as suggested in other answers.
Or just use ack (Edit: or The Silve...
How do I create a readable diff of two spreadsheets using git diff?
...ally have the references inserted into the formula)
Ctrl+C (copy), Ctrl+A (select all), Ctrl+V (paste) to fill the sheet.
If the sheets are similar, this spreadsheet will be empty except for a few cells with X in them, highlighting the differences. Unzoom to 40% to quickly see what is different.
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Does Notepad++ show all hidden characters?
...ould identify the character, where cursor takes 2 arrow keys
to move, just select that character.
do Ctrl-F
now you can count or
replace or even mark all such characters
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How to list of all the tables defined for the database when using active record?
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Don't know about active record, but here's a simple query:
select table_name
from INFORMATION_SCHEMA.Tables
where TABLE_TYPE = 'BASE TABLE'
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Is it possible to use Swift's Enum in Obj-C?
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To expand on the selected answer...
It is possible to share Swift style enums between Swift and Objective-C using NS_ENUM().
They just need to be defined in an Objective-C context using NS_ENUM() and they are made available using Swift dot ...
Dependency injection with Jersey 2.0
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The selected answer dates from a while back. It is not practical to declare every binding in a custom HK2 binder.
I'm using Tomcat and I just had to add one dependency. Even though it was designed for Glassfish it fits perfectly ...