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How to generate a random string in Ruby
...).chr }.join
I spend too much time golfing.
(0...50).map { ('a'..'z').to_a[rand(26)] }.join
And a last one that's even more confusing, but more flexible and wastes fewer cycles:
o = [('a'..'z'), ('A'..'Z')].map(&:to_a).flatten
string = (0...50).map { o[rand(o.length)] }.join
...
When to use PNG or JPG in iPhone development?
... decoding the image. You may need to decrease the quality of your JPG's in order to see a real benefit in file size but then you are displaying non-optimal images.
File size is certainly a factor but there are other considerations at play as well when choosing an image format.
...
Code coverage with Mocha
...ou're running a locally installed version of mocha, try istanbul cover node_modules/mocha/bin/_mocha.
– Eric McCarthy
May 20 '13 at 4:45
102
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Why do assignment statements return a value?
... to be careful and draw your line for "simple" low for readability: return _myBackingField ?? (_myBackingField = CalculateBackingField()); A lot less chaff than checking for null and assigning.
– Tom Mayfield
Sep 27 '10 at 22:02
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Get Android Phone Model programmatically
...:
Build.BOARD = MSM8974
Build.BOOTLOADER = s1
Build.BRAND = Sony
Build.CPU_ABI = armeabi-v7a
Build.CPU_ABI2 = armeabi
Build.DEVICE = D5503
Build.DISPLAY = 14.6.A.1.236
Build.FINGERPRINT = Sony/D5503/D5503:5.1.1/14.6.A.1.236/2031203XXX:user/release-keys
Build.HARDWARE = qcom
Build.HOST = BuildHost
B...
How to convert SQL Query result to PANDAS Data Structure?
...r. 2015
As noted below, pandas now uses SQLAlchemy to both read from (read_sql) and insert into (to_sql) a database. The following should work
import pandas as pd
df = pd.read_sql(sql, cnxn)
Previous answer:
Via mikebmassey from a similar question
import pyodbc
import pandas.io.sql as psql
cn...
MFC子窗口和父窗口（SetParent,SetOwner） - C/C++ - 清泛网 - 专注C/C++及内核技术
...己的子窗口(child)。在MFC 的CWnd类中，所有者窗口保存在m_hWndOwner成员变量中，父窗口则保存在m_hParent中，但是这两个值并不一定和窗口对象数据结构中的值相对应。
窗口之间的关系，决定了窗口的外在表现。比如显示、销毁等...
Git: How to rebase to a specific commit?
...you don't need this. Note that you must have specified <Upstream> in order to specify <Branch> or git will think you are specifying <Upstream>.
<Target> is the commit we will attach our string of commits to. When providing a branch name, you are simply specifying the head co...
select and update database record with a single queryset
...
Use the queryset object update method:
MyModel.objects.filter(pk=some_value).update(field1='some value')
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String representation of an Enum
...instance = new Dictionary<string,AuthenticationMethod>();
n.b. In order that the initialisation of the the "enum member" fields doesn't throw a NullReferenceException when calling the instance constructor, be sure to put the Dictionary field before the "enum member" fields in your class. Th...