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Linux bash: Multiple variable assignment
...good point, though I'm not sure if one needs the return status of echo command :-) I think at the time of writing the answer bash supporting this syntax was less common (as in installed by default), though I'm not 100% sure.
– Michael Krelin - hacker
Oct 21 '15...
Difference between single and double square brackets in Bash
...ix shell compliant condition tests.
Double [[]] are an extension to the standard [] and are supported by bash and other shells (e.g. zsh, ksh). They support extra operations (as well as the standard posix operations). For example: || instead of -o and regex matching with =~. A fuller list of differ...
Can you make just part of a regex case-insensitive?
...e minus sign will be turned off. E.g. (?i-sm) turns on case insensitivity, and turns off both single-line mode and multi-line mode.
Not all regex flavors support this. JavaScript and Python apply all mode modifiers to the entire regular expression. They don't support the (?-ismx) syntax, since turn...
How to detect the physical connected state of a network cable/connector?
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grep "" eth0/* is so elegant and easy, thanks! :) With the -s switch grep will not complain about the directories.
– Ray
Apr 10 '15 at 10:17
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Getting vertical gridlines to appear in line plot in matplotlib
I want to get both horizontal and vertical grid lines on my plot but only the horizontal grid lines are appearing by default. I am using a pandas.DataFrame from an sql query in python to generate a line plot with dates on the x-axis. I'm not sure why they do not appear on the dates and I have trie...
What's the meaning of * (asterisk) in XAML ColumnDefinition?
...efinitions>
The first column will get 7% of the total space available and the second column would get 93%. On the other hand if you had this definition:
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.07*"/>
<ColumnDefinition Width="0.14*"/>
</Grid.ColumnDefinition...
Type.GetType(“namespace.a.b.ClassName”) returns null
...
the type exists, it's in a different class library, and i need to get it by string name
– Omu
Dec 1 '09 at 9:58
28
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Check to see if a string is serialized?
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In case the passed string is not
unserializeable, FALSE is returned and
E_NOTICE is issued.
So, you have to check if the return value is false or not (with === or !==, to be sure not to have any problem with 0 or null or anything that equals to false, I'd say).
Just beware the notice : y...
What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
Please help me understand where to use a regular JOIN and where a JOIN FETCH.
5 Answers
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Add icon to submit button in twitter bootstrap 2
...gs/tag_button.asp for more information on what the button tag is meant for and its cross browser effect. Use this with caution, especially with forms.
– Matenia Rossides
Mar 3 '12 at 7:22
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