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阿里的线下野心 - 资讯 - 清泛网 - 专注C/C++及内核技术
...下主攻实体商业的O2O平台喵街日前宣布，将于7月4日升级2.0版本，该版本中推出了通用积分系统“元宝”，在为实体商业提供会员营销解决方案的同时，打通阿里体系的积分。阿里在做了两年铺垫后开始向线下更深处“伸手”。
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Finding three elements in an array whose sum is closest to a given number
...fy the problem statement, instead we will search for aj and ak that sum to ai +S.
– Boolean
May 20 '11 at 14:59
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Jackson: how to prevent field serialization
...ter out fields conditionally (by default, not used for deserialization; in 2.0 will be available but you can use different view on serialization, deserialization)
@JsonIgnoreProperties on class may be useful
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
... every polynomial factors uniquely (ring of polynomials is an Euclidean domain), this means ai are uniquely determined, up to permutation.
This ends a proof that remembering powers is enough to recover the numbers. For constant k, this is a good approach.
However, when k is varying, the direct app...
Using Tint color on UIImageView
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In swift 2.0+, you can do:
let image = UIImage(named: "your_image_name")!.imageWithRenderingMode(.AlwaysTemplate)
yourImageView.image = image
yourImageView.tintColor = UIColor.blueColor()
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Find which commit is currently checked out in Git
...how.
git log -1.
Bash prompt.
git status.
git bisect visualize.
I'll explain each option in detail below.
Option 1: git show
As explained in this answer to the general question of how to determine which commit you currently have checked-out (not just during git bisect), you can use git show wit...
How are 3D games so efficient? [closed]
...timized instructions and special techniques exist when you're developing against a particular set of hardware, to enable even better speedups.
The other part of your question is why a demo uses so much CPU:
... while a DX demo of a rotating Teapot @ 60fps uses a whopping 30% ?
It's common fo...
How to create a GUID/UUID using iOS
...oper documentation I found the CFUUID object is available on the iPhone OS 2.0 and later.
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Find the division remainder of a number
...er() function:
from math import remainder
print(remainder(26,7))
Output:
-2.0 # not 5
Note, as above, it's not the same as %.
Quoting the documentation:
math.remainder(x, y)
Return the IEEE 754-style remainder of x with
respect to y. For finite x and finite nonzero y, this is the
difference x - ...
How to round the corners of a button
... self.btnFoldButton.layer.cornerRadius = self.btnFoldButton.frame.height/2.0;
If button frame is an square it does not matter frame.height or frame.width. Otherwise use the largest of both ones.
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