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Releasing memory in Python
...roc.get_memory_info().rss
# create approx. 10**7 int objects and pointers
foo = ['abc' for x in range(10**7)]
mem1 = proc.get_memory_info().rss
# unreference, including x == 9999999
del foo, x
mem2 = proc.get_memory_info().rss
# collect() calls PyInt_ClearFreeList()
# or use ctypes: pythonapi.PyI...
Add new attribute (element) to JSON object using JavaScript
... you have to do is address it using the dot notation.
mything.NewField = 'foo';
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Remove by _id in MongoDB console
...
I've just bumped into this myself and this variation worked for me:
db.foo.remove({**_id**: new ObjectId("4f872685a64eed5a980ca536")})
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foll...
SQL update query using joins
... the FROM clause. So im in this case is valid
Generic example
UPDATE A
SET foo = B.bar
FROM TableA A
JOIN TableB B
ON A.col1 = B.colx
WHERE ...
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How do I tell CPAN to install all dependencies?
...
From then on install modules by executing (as root if necessary)
cpanm Foo::Bar
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Extracting specific columns in numpy array
...nswered Dec 5 '11 at 14:24
Fred FooFred Foo
317k6464 gold badges662662 silver badges785785 bronze badges
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PHP - How to check if a string contains a specific text [duplicate]
...trpos function: http://php.net/manual/en/function.strpos.php
$haystack = "foo bar baz";
$needle = "bar";
if( strpos( $haystack, $needle ) !== false) {
echo "\"bar\" exists in the haystack variable";
}
In your case:
if( strpos( $a, 'some text' ) !== false ) echo 'text';
Note that my use ...
Assign variable value inside if-statement [duplicate]
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I pity the int foo.
– xdhmoore
May 9 '18 at 22:44
@wviana ...
get just the integer from wc in bash
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To get just line count without whitespace: wc -l < foo.txt | xargs ref - stackoverflow.com/a/12973694/149428
– Taylor Edmiston
Feb 7 '19 at 22:17
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Extracting .jar file with command line
...es from a jar file, supply their filenames:
C:\Java> jar xf myFile.jar foo bar
The folder where jar is probably isn't C:\Java for you, on my Windows partition it's:
C:\Program Files (x86)\Java\jdk[some_version_here]\bin
Unless the location of jar is in your path environment variable, you'l...