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How to calculate the number of occurrence of a given character in each row of a column of strings?
I have a data.frame in which certain variables contain a text string. I wish to count the number of occurrences of a given character in each individual string.
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Microsoft Azure: How to create sub directory in a blob container
... is that you can search for a blob at a virtual level, by giving a partial string, up to a '/'.
These 2 things, adding a '/' to a path and a partial string for search, together create a virtual "file-system" storage.
share...
Android emulator shows nothing except black screen and adb devices shows “device offline”
...tor comes up on the screen. But even after waiting for as long as 2-3 hrs, all it shows is a black screen. Not even the android home screen or the android logo. Just a black screen. And while initially "adb devices" shows the emulator as offline.after 2-3 minutes the list of attached devices becomes...
Fit image into ImageView, keep aspect ratio and then resize ImageView to image dimensions?
...nsity);
}
The xml code for the ImageView:
<ImageView a:id="@+id/image_box"
a:background="#ff0000"
a:src="@drawable/star"
a:layout_width="wrap_content"
a:layout_height="wrap_content"
a:layout_marginTop="20dp"
a:layout_gravity="center_horizontal"/>
Thanks to this di...
What is the Java equivalent for LINQ? [closed]
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String for column name, which means compiler and IDE autocomplete won't help against typoes and refactoring is hard. Any plans to change that?
– Ekevoo
Jan 28 '14 at 14:25
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How can I initialize a String array with length 0 in Java?
The Java Docs for the method
String[] java.io.File.list(FilenameFilter filter)
includes this in the returns description:
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How can I fix WebStorm warning “Unresolved function or method” for “require” (Firefox Add-on SDK)
... edited Apr 25 at 9:45
MARSHMALLOW
1,24022 gold badges88 silver badges2323 bronze badges
answered Nov 22 '13 at 15:10
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Best Practices: Salting & peppering passwords?
...sult in a far weaker hash than bcrypt(pw, salt) if hash() returns a binary string.
Working Against Design
The way bcrypt (and other password hashing algorithms) were designed is to work with a salt. The concept of a pepper was never introduced. This may seem like a triviality, but it's not. The rea...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...以参考我摘录的官方的一个说明：http://blog.sina.com.cn/s/blog_66fa66650102w7is.html以及我在实施地图调用过程中的一些记录说明：http://blog.sina.com.cn/s/blog_66fa66650102wwfl.html（3）调用高德地图：
高德地图的uri参考地址：http://lbs.amap.com/api/u...
How many bytes in a JavaScript string?
I have a javascript string which is about 500K when being sent from the server in UTF-8. How can I tell its size in JavaScript?
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