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Check if a string matches a regex in Bash script
...amp; echo "yes"
Or more a accurate test:
[[ $date =~ ^[0-9]{4}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])$ ]] && echo "yes"
# |^^^^^^^^ ^^^^^^ ^^^^^^ ^^^^^^ ^^^^^^^^^^ ^^^^^^ |
# | | ^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^ |
# | | | ...
What is difference between functional and imperative programming languages?
... to add a series of numbers:
int total = 0;
int number1 = 5;
int number2 = 10;
int number3 = 15;
total = number1 + number2 + number3;
Each statement changes the state of the program, from assigning values to each variable to the final addition of those values. Using a sequence of five state...
Python memory usage of numpy arrays
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246
You can use array.nbytes for numpy arrays, for example:
>>> import numpy as np
>&...
How to run a JAR file
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210
You need to specify a Main-Class in the jar file manifest.
Oracle's tutorial contains a compl...
AngularJS : Differences among = & @ in directive scope? [duplicate]
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Persistent invalid graphics state error when using ggplot2
...n't get reset. This worked for me and it's simpler than reinstalling ggplot2.
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Android Studio: Where is the Compiler Error Output Window?
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edited Jul 27 '18 at 9:28
answered Jun 1 '13 at 20:32
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When should I mock?
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124
A unit test should test a single codepath through a single method. When the execution of a met...
Reading a binary file with python
...using struct.unpack:
The start bytes: struct.unpack("iiiii", fileContent[:20])
The body: ignore the heading bytes and the trailing byte (= 24); The remaining part forms the body, to know the number of bytes in the body do an integer division by 4; The obtained quotient is multiplied by the string ...
jQuery UI DatePicker - Change Date Format
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