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jQuery map vs. each
...ems = $.map(items, function(i) {
return i + 1;
});
// newItems is [2,3,4,5]
You can also use the map function to remove an item from an array. For example:
var items = [0,1,2,3,4,5,6,7,8,9];
var itemsLessThanEqualFive = $.map(items, function(i) {
// removes all items > 5
if (i > 5) ...
Keep only first n characters in a string?
...
547
You are looking for JavaScript's String method substring
e.g.
'Hiya how are you'.substring(0...
海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...否重复就需要4s，就算4s一个文档，单线程一分钟才处理15个文档，一个小时才900个，一天也才21600个文档，这个数字和一天100w相差甚远，需要多少机器和资源才能解决。
为此我们需要一种应对于海量数据场景的去重方案，经过...
bash HISTSIZE vs. HISTFILESIZE?
...command history), is truncated to contain HISTFILESIZE=10 lines.
You write 50 lines.
At the end of your 50 commands, only commands 41 to 50 are in your history list, whose size is determined by HISTSIZE=10.
You end your session.
Assuming histappend is not enabled, commands 41 to 50 are saved to yo...
How to get a DOM Element from a JQuery Selector
... Mosh Feu
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answered Nov 5 '09 at 2:11
cletuscletus
561k152152 gold bad...
Pandas index column title or name
...index name.
– Piotr Migdal
Apr 11 '15 at 20:37
14
it should be possible to specify index name at ...
How to increment a pointer address and pointer's value?
...
5 Answers
5
Active
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How to add 10 days to current time in Rails
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answered Jan 11 '11 at 5:22
gunngunn
7,54122 gold badges2020 silver badges2323 bronze badges
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Run Cron job every N minutes plus offset
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529
To run a task every 20 minutes starting at 5 past the hour, try this:
5-59/20 * * * *
Expl...
Array initializing in Scala
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Vasil RemeniukVasil Remeniuk
19.7k55 gold badges6666 silver badges8181 bronze badges
...