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How can I clear an HTML file input with JavaScript?
...(f){
if(f.value){
try{
f.value = ''; //for IE11, latest Chrome/Firefox/Opera...
}catch(err){ }
if(f.value){ //for IE5 ~ IE10
var form = document.createElement('form'),
parentNode = f.parentNode, ref = f.nextSibling;
form...
How to extract the n-th elements from a list of tuples?
...s. The returned list is truncated
in length to the length of the shortest argument sequence.
>>> elements = [(1,1,1),(2,3,7),(3,5,10)]
>>> zip(*elements)
[(1, 2, 3), (1, 3, 5), (1, 7, 10)]
>>> zip(*elements)[1]
(1, 3, 5)
>>>
Neat thing I learned today: U...
How does the Windows Command Interpreter (CMD.EXE) parse scripts?
...ise, attempt to parse out an internal command and execute.
The following tests are made to determine if an unquoted command token represents an internal command:
If the command token exactly matches an internal command, then execute it.
Else break the command token before the first occurrence of...
Use underscore inside Angular controllers
...a lot less likely to want to substitute out your underscore library during testing than some other more specific dependency it's understandable that it doesn't seem necessary.
– fess .
Jun 2 '13 at 3:13
...
Match everything except for specified strings
...x library and it only works like this : ^(?!red|green|blue). Also true for testing it on regex101.com . So is the above a typo missing a ^ or does it actually work like that in Java/Perl/Python .. ?
– Peter
Jul 31 '19 at 9:47
...
How to simulate Android killing my process
...rces (RAM, CPU, etc.). I need to be able to simulate this behaviour during testing so that I can ensure that my application is behaving correctly. I want to be able to do this in an automated way so that I can test if the application behaves correctly whenever this happens, which means that I'll hav...
Tri-state Check box in HTML?
... in the HTML markup, it can only be done via Javascript (see this JSfiddle test and this detailed article in CSS tricks)
This state doesn't change the value of the checkbox, it is only a visual cue that masks the input's real state.
Browser test: Worked for me in Chrome 22, Firefox 15, Opera 12 and ...
Add subdomain to localhost URL
..., however, trick your computer into thinking it owns a specific domain and test things that way. For instance, if you have a UNIX-based operating system, open (as root) the file /etc/hosts and add a line (or lines) like this:
127.0.0.1 example.com
127.0.0.1 subdomain.example.com
Your comput...
In Python, how does one catch warnings as if they were exceptions?
...
To quote from the python handbook (27.6.4. Testing Warnings):
import warnings
def fxn():
warnings.warn("deprecated", DeprecationWarning)
with warnings.catch_warnings(record=True) as w:
# Cause all warnings to always be triggered.
warnings.simplefilter("...
How to disable Golang unused import error
...get to the import statement and back when you're just trying to compile or test some code file that you are iteratively fleshing out.
– mtraceur
Nov 19 '19 at 22:22
add a comm...