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Difference between del, remove and pop on lists
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@rite2hhh it tests for equality. Equality tests test for identity first as an optimisation
– Martijn Pieters♦
Dec 26 '19 at 20:33
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How to check that an object is empty in PHP?
...$two == new stdClass()); // TRUE
var_dump($one == $two); // TRUE
$two->test = TRUE;
var_dump($two == new stdClass()); // FALSE
var_dump($one == $two); // FALSE
$two->test = FALSE;
var_dump($one == $two); // FALSE
$two->test = NULL;
var_dump($one == $two); // FALSE
$two->test = TRUE;
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How to run a program without an operating system?
...s possible, as that is safer and more convenient for development. The QEMU tests have been on an Ubuntu 18.04 host with the pre-packaged QEMU 2.11.1.
The code of all x86 examples below and more is present on this GitHub repo.
How to run the examples on x86 real hardware
Remember that running example...
How to download image using requests
...ts
from StringIO import StringIO
from PIL import Image
import profile
def testRequest():
image_name = 'test1.jpg'
url = 'http://example.com/image.jpg'
r = requests.get(url, stream=True)
with open(image_name, 'wb') as f:
for chunk in r.iter_content():
f.write(chu...
How to get string objects instead of Unicode from JSON?
...json.loads('[' * 991 + ']' * 991)). It crashes at 992. So at least in this test, Mark's can go deeper, contrary to what you said.
– Stefan Pochmann
May 3 '17 at 21:26
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Getting the name of a variable as a string
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Somehow the function does not work in a loop: test = {} print(varname.nameof(test)) for i in [0]: print(varname.nameof(test)) The first print gives test, the print in the loop raises VarnameRetrievingError: Callee's node cannot be detected.
– Tillus...
Difference between RegisterStartupScript and RegisterClientScriptBlock?
...rtupScript method:
Page.ClientScript.RegisterStartupScript(Me.GetType(), "Testing", _
"document.forms[0]['TextBox1'].focus();", True)
This works well because the textbox on the page is generated and placed on the page by the time the browser gets down to the bottom of the page and gets to this l...
How to check if an element is in an array
... be equatable and takes a predicate as an
argument, see e.g. Shorthand to test if an object exists in an array for Swift?.
Swift older versions:
let elements = [1,2,3,4,5]
if contains(elements, 5) {
println("yes")
}
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How to count the number of files in a directory using Python
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os.listdir() will be slightly more efficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():
import os, os.path
# simple version for working with CWD
print len([name for name in os.listdir('.') if os.path.isfile(name...
Should I declare Jackson's ObjectMapper as a static field?
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I've faced strange behaviors during unit/integration tests of a large enterprise application. When putting ObjectMapper as static final class attribute I started facing PermGen issues. Would anyone care to explain probable causes? I was using jackson-databind version 2.4.1.
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