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IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
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This error happend to me after i've updated my JDK version to jdk1.8.0_161 -
But the project's sdk was still pointing to the old jdk 1.8.0_131
(Seems that updgrading java causing the previous version to be wiped).
Do this:
In the IntelliJ IDE go to File > Project Structure, from there:
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Longest line in a file
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awk '{print length, $0}' Input_file |sort -nr|head -1
For reference : Finding the longest line in a file
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Delete element in a slice
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There are two options:
A: You care about retaining array order:
a = append(a[:i], a[i+1:]...)
// or
a = a[:i+copy(a[i:], a[i+1:])]
B: You don't care about retaining order (this is probably faster):
a[i] = a[len(a)-1] // Replace it with the last one. CAREFUL only works if you ha...
python pandas dataframe to dictionary
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See the docs for to_dict. You can use it like this:
df.set_index('id').to_dict()
And if you have only one column, to avoid the column name is also a level in the dict (actually, in this case you use the Series.to_dict()):
df.set_index('id')...
Role/Purpose of ContextLoaderListener in Spring?
...om/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="
http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID"
version="2.5">
<display-name>Some Minimal Webapp<...
What are the performance characteristics of sqlite with very large database files? [closed]
... Another option is to keep the indexes, but pre-sort the data in index-order before you insert it.
– Steven Kryskalla
Feb 19 '14 at 23:42
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Is the pImpl idiom really used in practice?
...hose benefits come at a cost: an extra level of indirection is required in order to access the implementation methods.
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How to pretty print XML from Java?
...?xml ...> declaration, add transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes")
– rustyx
Aug 25 '15 at 20:01
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iOS 7 TextKit - How to insert images inline with text?
...the following link for more details on customising the NSTextAttachment in order to resize the image.
http://ossh.com.au/design-and-technology/software-development/implementing-rich-text-with-images-on-os-x-and-ios/
In my example I resize the image to fit the width, in your case you may want to res...
How do I find numeric columns in Pandas?
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You could use select_dtypes method of DataFrame. It includes two parameters include and exclude. So isNumeric would look like:
numerics = ['int16', 'int32', 'int64', 'float16', 'float32', 'float64']
newdf = df.select_dtypes(include=numerics)
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