Tutorial by Examples: f

Predefined exceptions are internally defined exceptions but they have names. Oracle database raise this type of exceptions automatically. Example create or replace procedure insert_emp is begin insert into emp (emp_id, ename) values ('1','Jon'); exception when dup_val_on_index then ...
As the name suggest user defined exceptions are created by users. If you want to create your own exception you have to: Declare the exception Raise it from your program Create suitable exception handler to catch him. Example I want to update all salaries of workers. But if there are no work...
Bootstrap components are a collection of optional jQuery plugins which bundled with Bootstrap. The purpose of Bootstrap components is to provide extended features and capabilities which would be difficult (or impossible) to accomplish without the use of Javascript. Some components provide are pure...
To list all the git repository locations on your you can run the following find $HOME -type d -name ".git" Assuming you have locate, this should be much faster: locate .git |grep git$ If you have gnu locate or mlocate, this will select only the git dirs: locate -ber \\.git$
To find a file in the Hadoop Distributed file system: hdfs dfs -ls -R / | grep [search_term] In the above command, -ls is for listing files -R is for recursive(iterate through sub directories) / means from the root directory | to pipe the output of first command to the second grep command t...
Note: The shown CMake error messages already include the fix for "non-standard" library/tool installation paths. The following examples just demonstrate more verbose CMake find_package() outputs. CMake internally supported Package/Module If the following code (replace the FindBoost modul...
In order to build an IPA file in XCode, you require to sign your application with a certificate and provisioning profile. These can be created at https://developer.apple.com/account/ios/profile/create Provisioning Profile Types Provisioning Profiles are split into two types, Development, and Distr...
DateUtils.formatDateTime() allows you to supply a time, and based on the flags you provide, it creates a localized datetime string. The flags allow you to specify whether to include specific elements (like the weekday). Date date = new Date(); String localizedDate = DateUtils.formatDateTime(contex...
Format a date: Date date = new Date(); DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM); String localizedDate = df.format(date) Format a date and time. Date is in short format, time is in long format: Date date = new Date(); DateFormat df = DateFormat.getDateTimeInstance(DateFor...
Date date = new Date(); df = new SimpleDateFormat("HH:mm", Locale.US); String localizedDate = df.format(date) Commonly used patterns: HH: hour (0-23) hh: hour (1-12) a: AM/PM marker mm: minute (0-59) ss: second dd: day in month (1-31) MM: month yyyy: year
Based on this blog post. Assume you have a method like this: def get[T]: Option[T] = ??? When you try to call it without specifying the generic parameter, Nothing gets inferred, which is not very useful for an actual implementation (and its result is not useful). With the following solution t...
These are general tips that in general improve performance. If your code is slow, it is always important to profile it to figure out what parts are slow. Guessing is never enough. Improving the execution speed of something that only takes up 1% of the execution time probably isn't worth the effort. ...
FlowRouter is more modular compared to Iron Router. Install FlowRouter meteor add kadira:flow-router Rendering a template In particular, you must manually add a layout rendering package to link with your rendering engine: Blaze Layout for Blaze: meteor add kadira:blaze-layout React Layout ...
MAPCAR is the most used function of the family: CL-USER> (mapcar #'1+ '(1 2 3)) (2 3 4) CL-USER> (mapcar #'cons '(1 2 3) '(a b c)) ((1 . A) (2 . B) (3 . C)) CL-USER> (mapcar (lambda (x y z) (+ (* x y) z)) '(1 2 3) '(10 20 30) '(1...
CL-USER> (maplist (lambda (list) (cons 0 list)) '(1 2 3 4)) ((0 1 2 3 4) (0 2 3 4) (0 3 4) (0 4)) CL-USER> (maplist #'append '(a b c d -) '(1 2 3)) ((A B C D - 1 2 3) (B C D - 2 3) (C D - 3))
MAPCAN: CL-USER> (mapcan #'reverse '((1 2 3) (a b c) (100 200 300))) (3 2 1 C B A 300 200 100) CL-USER> (defun from-to (min max) (loop for i from min to max collect i)) FROM-TO CL-USER> (from-to 1 5) (1 2 3 4 5) CL-USER> (mapcan #'from-to '(1 2 3) '(5 5 5)) (1 2 3 4 5...
MAPC: CL-USER> (mapc (lambda (x) (print (* x x))) '(1 2 3 4)) 1 4 9 16 (1 2 3 4) CL-USER> (let ((sum 0)) (mapc (lambda (x y) (incf sum (* x y))) '(1 2 3) '(100 200 300)) sum) 1400 ; => (1 x 100) + (2 x 200) + (3 x 30...
As mentioned in "Remarks", a partition is a part/slice/chunk of an RDD. Below is a minimal example on how to request a minimum number of partitions for your RDD: In [1]: mylistRDD = sc.parallelize([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 2) In [2]: mylistRDD.getNumPartitions() Out[2]: 2 No...
As rule of thumb, one would want his RDD to have as many partitions as the product of the number of executors by the number of used cores by 3 (or maybe 4). Of course, that's a heuristic and it really depends on your application, dataset and cluster configuration. Example: In [1]: data = sc.textF...
private static final String TAG = "IntentBitmapFetch"; private static final String COLON_SEPARATOR = ":"; private static final String IMAGE = "image"; @Nullable public Bitmap getBitmap(@NonNull Uri bitmapUri, int maxDimen) { InputStream is = context.getConten...

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