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Rename multiple files based on pattern in Unix
... @nik Without quotes renaming this list of files would throw an error: touch fghfilea fghfileb fghfilec fghfile\ d. I kindly suggest to take into consideration @DaveNelson remarks.
– luissquall
Jun 2 '14 at 21:09
...
Find a class somewhere inside dozens of JAR files?
...rom the output of the jar command, for the given class name; this will set ERRORLEVEL to 1 iff there's a match (otherwise 0).
&& echo %G - iff ERRORLEVEL is non-zero, write the Java archive file name to standard output (the console).
Web
Use a search engine that scans JAR files.
...
Converting java.util.Properties to HashMap
...
If some key or value is not a String it will produce a ClassCastException error. With current Properties implementation this is very unlikely to happen, as long as you don't use the mutable call methods from the super Hashtable<Object,Object> of Properties.
So, if don't do nasty things with ...
Difference between := and = operators in Go
...n't use them twice (in the same scope):
legal := 42
legal := 42 // <-- error
Because, := introduces "a new variable", hence using it twice does not redeclare a second variable, so it's illegal.
★ 3rd Rule:
You can use them for multi-variable declarations and assignments:
foo, bar := 4...
Extracting extension from filename in Python
...filename = "example.jpeg"
>>> filename.split(".")[-1]
'jpeg'
No error when file doesn't have an extension:
>>> "filename".split(".")[-1]
'filename'
But you must be careful:
>>> "png".split(".")[-1]
'png' # But file doesn't have an extension
Also will not work wi...
IBOutlet and IBAction
...then that code would read id UIlabel *namelabel; which produces a compiler error. As I originally stated, IBOutlet resolves to nothing.
– Jasarien
Aug 20 '12 at 11:25
add a co...
CardView layout_width=“match_parent” does not match parent RecyclerView width
... from the specified xml resource. Throws
InflateException if there is an error.
Parameters
resource ID for an XML layout resource to load (e.g.,
R.layout.main_page) root
view to be the parent of the
generated hierarchy (if attachToRoot is true), or else simply an
object that provid...
How to use null in switch
...of a reference type, such as a boxed primitive type or an enum, a run-time error will occur if the expression evaluates to null at run-time.
You must have to verify for null before Swithch statement execution.
if (i == null)
See The Switch Statement
case null: // will never be executed, theref...
How to get the last character of a string in a shell?
...echo "${str: -1}") This will result in the nasty red bar showing a syntax error starting at the :
– krb686
May 22 '15 at 18:33
...
How do I read and parse an XML file in C#?
... @GabrielGarcia true, sometimes beginner would stuck at missing include's error
– Anonymous
Jan 22 at 7:53
1
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