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What is the proper way to test if a parameter is empty in a batch file?
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if "!param1!"=="" ( echo it is empty )
rem ... or use the DEFINED keyword now
if defined param1 echo There is something
The advantage of this is that dealing with param1 is absolutly safe.
And the setting of param1 will work in many cases, like
test.bat hello"this is"a"test
test.bat you^&...
When to use wrapper class and primitive type
... exceptions to indicate what has gone wrong. Good, I'll be doing that from now on...
– klaar
Nov 16 '17 at 8:46
1
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What does the PHP error message “Notice: Use of undefined constant” mean?
...sage is due to the unfortunate fact that PHP will implicitly declare an unknown token as a constant string of the same name.
That is, it's trying to interpret this (note the missing quote marks):
$_POST[department]
The only valid way this would be valid syntax in PHP is if there was previously ...
What is C# analog of C++ std::pair?
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Tuple<> is now a better solution.
– dkantowitz
Aug 3 '12 at 7:06
6
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What does mvn install in maven exactly do
...ct you could configure it to always skip the local repo, although I don't know how without looking it up.
– Dave Newton
Jun 19 '13 at 19:53
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Starting Eclipse w/ Specific Workspace
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Now, how do you add this option on a Mac desktop shortcut...?
– Danijel
Sep 18 '19 at 8:23
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Properties file in python (similar to Java Properties)
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Since nowhere here it is mentioned, let me add again that this is not the same. I cant speak for Java or Py3, and maybe it works for simple key/values. But the syntax for string interpolation is different. This solution provides P...
Determine the number of lines within a text file
... rather than greedily reading them all into an array like ReadAllLines. So now you can have both efficiency and conciseness with:
var lineCount = File.ReadLines(@"C:\file.txt").Count();
Original Answer
If you're not too bothered about efficiency, you can simply write:
var lineCount = File.Rea...
Insert auto increment primary key to existing table
...ng to alter a table which has no primary key nor auto_increment column. I know how to add an primary key column but I was wondering if it's possible to insert data into the primary key column automatically (I already have 500 rows in DB and want to give them id but I don't want to do it manually). A...
Is there a point to minifying PHP?
I know you can minify PHP, but I'm wondering if there is any point. PHP is an interpreted language so will run a little slower than a compiled language. My question is: would clients see a visible speed improvement in page loads and such if I were to minify my PHP?
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