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Java: Get first item from a collection
If I have a collection, such as Collection<String> strs , how can I get the first item out? I could just call an Iterator , take its first next() , then throw the Iterator away. Is there a less wasteful way to do it?
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Git: Show all of the various changes to a single line in a specified file over the entire git histor
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@AndySong - If the string you are searching for is unique enough, perhaps you can just leave off the file name and still get what you're looking for.
– rob
Jul 21 '13 at 16:25
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Moving average or running mean
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UPD: more efficient solutions have been proposed by Alleo and jasaarim.
You can use np.convolve for that:
np.convolve(x, np.ones((N,))/N, mode='valid')
Explanation
The running mean is a case of the mathematical operation of convolution. For the running mean, you slide...
How to sort a NSArray alphabetically?
...s for pointing that out. localizedCaseInsensitiveCompare: is a method of NSString and should be sufficient to sort an array of strings.
– Thomas Zoechling
Dec 20 '10 at 16:37
1
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C# - How to get Program Files (x86) on Windows 64 bit
...ng on 64 bit Windows
64 bit program running on 64 bit windows
static string ProgramFilesx86()
{
if( 8 == IntPtr.Size
|| (!String.IsNullOrEmpty(Environment.GetEnvironmentVariable("PROCESSOR_ARCHITEW6432"))))
{
return Environment.GetEnvironmentVariable("ProgramFiles(x86)...
How can I pipe stderr, and not stdout?
... preserved as stderr, but you won't see any lines in stderr containing the string "something".
This has the unique advantage of not reversing or discarding stdout and stderr, nor smushing them together, nor using any temporary files.
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How do I find a default constraint using INFORMATION_SCHEMA?
...efault value constraint
SELECT
default_constraints.name
FROM
sys.all_columns
INNER JOIN
sys.tables
ON all_columns.object_id = tables.object_id
INNER JOIN
sys.schemas
ON tables.schema_id = schemas.schema_id
INNER JOIN
sys.default_const...
Simple way to find if two different lists contain exactly the same elements?
...ch has the same quantity of any value.
public boolean arraysMatch(List<String> elements1, List<String> elements2) {
// Optional quick test since size must match
if (elements1.size() != elements2.size()) {
return false;
}
List<String> work = newArrayList(ele...
Propagate all arguments in a bash shell script
... This does this work for pure pass through of quoted/escaped strings: Observe: cat rsync_foo.sh #!/bin/bash echo "$@" rsync "$@" ./rsync_foo.sh -n "bar me" bar2 bar me bar2skipping directory bar me Is it possible to have shell script that can see the ...
How to read values from properties file?
...ans:
@Component
class MyClass {
@Value("${my.property.name}")
private String[] myValues;
}
EDIT: updated the code to parse property with mutliple comma-separated values:
my.property.name=aaa,bbb,ccc
If that doesnt work, you can define a bean with properties, inject and process it manually:...