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node.js shell command execution
...arg1 arg2 ... "). Your foo.sh script can reference these using $1, $2 ... etc.
– Tony O'Hagan
Jul 7 '18 at 1:13
If th...
Using union and order by clause in mysql
I want to use order by with union in mysql query.
I am fetching different types of record based on different criteria from a table based on distance for a search on my site.
The first select query returns data related to the exact place search .
The 2nd select query returns data related to distance ...
PHP array delete by value (not key)
...
Well, deleting an element from array is basically just set difference with one element.
array_diff( [312, 401, 15, 401, 3], [401] ) // removing 401 returns [312, 15, 3]
It generalizes nicely, you can remove as many elements as you like at the same time, if you want.
...
Watch multiple $scope attributes
...bject in scope.
$scope.$watchGroup(
[function () { return _this.$scope.ViewModel.Monitor1Scale; },
function () { return _this.$scope.ViewModel.Monitor2Scale; }],
function (newVal, oldVal, scope)
{
if (newVal != oldVal) {
...
Replace console output in Python
...his is something I am using:
def startProgress(title):
global progress_x
sys.stdout.write(title + ": [" + "-"*40 + "]" + chr(8)*41)
sys.stdout.flush()
progress_x = 0
def progress(x):
global progress_x
x = int(x * 40 // 100)
sys.stdout.write("#" * (x - progress_x))
s...
Grep characters before and after match?
...
3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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Running JAR file on Windows
...
Easiest route is probably upgrading or re-installing the Java Runtime Environment (JRE).
Or this:
Open the Windows Explorer, from the Tools select 'Folder Options...'
Click the File Types tab, scroll down and select JAR File type.
Press the Advanced button.
In the Edi...
is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
...make sense conceptually. However, the wrapper classes (Integer, Character, etc.), as well as any other instantiable class can be null.
Besides that fact, there isn't any short-hand syntax for a null coalescing operator. You must use the expanded form.
...
Stateless and Stateful Enterprise Java Beans
...s. If stateless session beans do not retain their state in between method calls, why is my program acting the way it is?
7 ...
How to select unique records by SQL
...ng allows you to add aggregated data, like the min(id), max(id), count(*), etc:
SELECT word, num, min(id), max(id), count(*)
FROM dupes
GROUP BY word, num
ORDER BY word, num;
/*
word|num|min|max|count|
----|---|---|---|-----|
aaa |100| 1| 9| 2|
bbb |200| 2| 5| 2|
bbb |400| 4| 8| ...