大约有 6,261 项符合查询结果（耗时：0.0241秒） [XML]
Check if class already assigned before adding
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$("label")
.not(".foo")
.addClass("foo");
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Join a list of strings in python and wrap each string in quotation marks
...n 3.6+), I've used backticks for a string used for a SQL script.
keys = ['foo', 'bar' , 'omg']
', '.join(f'`{k}`' for k in keys)
# result: '`foo`, `bar`, `omg`'
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Log exception with traceback
... print 'got exception %s' % (args,)
sys.excepthook = log_exception
def foo():
a = 1 / 0
threading.Thread(target=foo).start()
The messages on this Python Issue thread really result in 2 suggested hacks. Either subclass Thread and wrap the run method in our own try except block in order to ...
How to break out of a loop from inside a switch?
...ions, which are no harder than arbitrary end conditions. Simply, a "while(foo)" loop, where foo is a boolean variable set in an arbitrary way, is no better than "while(true)" with breaks. You have to look through the code in both cases. Putting forth a silly reason (and microefficiency is a silly...
Why is i++ not atomic?
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Thread B fetches i
Time 2:
Thread A overwrites i with a new value say -foo-
Thread B overwrites i with a new value say -bar-
Thread B stores -bar- in i
// At this time thread B seems to be more 'active'. Not only does it overwrite
// its local copy of i but also makes it in time to store -bar-...
Convert JsonNode into POJO
...;
JsonParser jsonParser = mapper.getJsonFactory().createJsonParser("{\"foo\":\"bar\"}");
JsonNode tree = jsonParser.readValueAsTree();
// Do stuff to the tree
mapper.readValue(tree, Foo.class);
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REST Complex/Composite/Nested Resources [closed]
...comic book (form: POST /draft-comic-books).
POST /draft-comic-books
title=foo
author=boo
publisher=goo
published=2011-01-01
=> 302 Found, Location: /draft-comic-books/3, Redirect to draft comic book (id: 3) with covers (binary).
GET /draft-comic-books/3
=> 200 OK, Get draft comic book (id: 3...
jQuery attr vs prop?
...electedIndex, or defaultValue you had to do something like:
var elem = $("#foo")[0];
if ( elem ) {
index = elem.selectedIndex;
}
That sucked, so prop was added:
index = $("#foo").prop("selectedIndex");
This was great, but annoyingly this wasn't backward compatible, as:
<input type="checkbox" ...
The data-toggle attributes in Twitter Bootstrap
...modal" on a
controller element, like a button, along with a data-target="#foo" or href="#foo"
to target a specific modal to toggle.-->
<button type="button" data-toggle="modal" data-target="#myModal">Launch modal</button>
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Resolve absolute path from relative path and/or file name
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@KurtPfeifle d:\foo\..\bar\xyz.txt can still be normalized. I recommend using this approach with @axel-heider's answer below (using a batch subroutine -- then you can do it on any variable, not just a numbered variable).
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