大约有 40,000 项符合查询结果（耗时：0.0488秒） [XML]
What to do with “Unexpected indent” in python?
... "hello"
IndentationError: unexpected indent
Unindent does not match any outer indentation level. This line of code has fewer spaces at the start than the one before, but equally it does not match any other block it could be part of. Python cannot decide where it goes. For instance, in the followi...
How do I format a long integer as a string without separator in Java?
...tion, etc. Specifically, we have a need to use a "choice" format where the output depends upon the values being displayed, and that's what java.text.ChoiceFormat is for.
Here is an example for how to get this done:
MessageFormat fmt = new MessageFormat("{0,choice,0#zero!|1#one!|1<{0,number,...
Thread context switch Vs. process context switch
...stem kernel to perform the context switch. The process of switching in and out of the OS kernel along with the cost of switching out the registers is the largest fixed cost of performing a context switch.
A more fuzzy cost is that a context switch messes with the processors cacheing mechanisms. Bas...
How to sort an array in Bash
... "[%s]\n" "${sorted[@]}"
[3 5]
[a c]
[b]
[f]
Note: @sorontar has pointed out that care is required if elements contain wildcards such as * or ?:
The sorted=($(...)) part is using the "split and glob" operator. You should turn glob off: set -f or set -o noglob or shopt -op noglob or an element ...
How do you detect the clearing of a “search” HTML5 input?
...
Thanks, can't figure out when search event happens other than when you click on the 'x'. It doesn't seem to fire on keyup, blur or when form it's in is submitted. But this deserves to be marked as an answer.
– Maksim Vi.
...
How can you debug a CORS request with cURL?
...request. Substitute in whatever your domain is.
The --verbose flag prints out the entire response so you can see the request and response headers.
The url I'm using above is a sample request to a Google API that supports CORS, but you can substitute in whatever url you are testing.
The response s...
Update MongoDB field using value of another field
...tName"]}}}
]
)
MongoDB 3.4+
In 3.4+ you can use $addFields and the $out aggregation pipeline operators.
db.collection.aggregate(
[
{ "$addFields": {
"name": { "$concat": [ "$firstName", " ", "$lastName" ] }
}},
{ "$out": "collection" }
]
)
Note...
How to remove focus around buttons on click
...for me. This problem may be specific to MacOS with Chrome.
.btn:focus {
outline: none;
box-shadow: none;
}
Note though that this has implications for accessibility and isn't advised until you have a good consistent focus state for your buttons and inputs. As per the comments below, there are ...
What is a bank conflict? (Doing Cuda/OpenCL programming)
...een reading the programming guide for CUDA and OpenCL, and I cannot figure out what a bank conflict is. They just sort of dive into how to solve the problem without elaborating on the subject itself. Can anybody help me understand it? I have no preference if the help is in the context of CUDA/OpenCL...
JavaScript DOM remove element
...
Thanks figured it out right before I read your post. Had to change it to whereto.removeChild(whereto.childNodes[0]);
– Joshua Redfield
Jan 12 '12 at 6:18
...