大约有 26,000 项符合查询结果（耗时：0.0351秒） [XML]
Is there any advantage of using map over unordered_map in case of trivial keys?
A recent talk about unordered_map in C++ made me realize that I should use unordered_map for most cases where I used map before, because of the efficiency of lookup ( amortized O(1) vs. O(log n) ). Most times I use a map, I use either int or std::string as the key type; hence, I've got...
MySQL and GROUP_CONCAT() maximum length
...ecute("SET SESSION group_concat_max_len = ..."); inside the Dao initialize method but as keatkeat has stated, this is only temporary. If anyone knows the right way to make this change permanently pls let me know
– IcedDante
Nov 18 '14 at 22:42
...
Autocompletion in Vim
...matic code completion as you type.
2015 Edit: I personally use YouCompleteMe now.
share
|
improve this answer
|
follow
|
...
JQuery to check for duplicate ids in a DOM
... already discovered three places where I have duplicate IDs. it frustrates me slightly that most peoples solution to this problem is to use 'firebug' or 'html validator'. thats not good enough! i want to catch the unexpected duplicates in wierd situations.
– Simon_Weaver
...
How to take a screenshot programmatically on iOS
...
|
show 7 more comments
46
...
Django template how to look up a dictionary value with a variable
...nary[key] it will raise a KeyError then.)
usage:
{{ mydict|get_item:item.NAME }}
share
|
improve this answer
|
follow
|
...
How do I pre-populate a jQuery Datepicker textbox with today's date?
...
Update: There are reports this no longer works in Chrome.
This is concise and does the job (obsolete):
$(".date-pick").datepicker('setDate', new Date());
This is less concise, utilizing chaining allows it to work in chrome (2019-06-04):
$(".date-pick").datepicker().datepick...
How can I recursively find all files in current and subfolders based on wildcard matching?
...
Use find for that:
find . -name "foo*"
find needs a starting point, and the . (dot) points to the current directory.
share
|
improve this answer
...
Splitting string into multiple rows in Oracle
I know this has been answered to some degree with PHP and MYSQL, but I was wondering if someone could teach me the simplest approach to splitting a string (comma delimited) into multiple rows in Oracle 10g (preferably) and 11g.
...
Graphviz: How to go from .dot to a graph?
...
type: dot -Tps filename.dot -o outfile.ps
If you want to use the dot renderer. There are alternatives like neato and twopi. If graphiz isn't in your path, figure out where it is installed and run it from there.
You can change the output format ...