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rsync copy over only certain types of files using include option
...to exclude all files --exclude="*", include all directories --include="*/" and include all *.sh files --include="*.sh".
You can find some good examples in the section Include/Exclude Pattern Rules of the man page
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Checking the equality of two slices
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You need to loop over each of the elements in the slice and test. Equality for slices is not defined. However, there is a bytes.Equal function if you are comparing values of type []byte.
func testEq(a, b []Type) bool {
// If one is nil, the other must also be nil.
if (a ...
Generate random numbers following a normal distribution in C/C++
How can I easily generate random numbers following a normal distribution in C or C++?
18 Answers
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In C++, is it still bad practice to return a vector from a function?
...d Jun 28 '10 at 17:55
Peter AlexanderPeter Alexander
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What is the best way to test for an empty string in Go?
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Both styles are used within the Go's standard libraries.
if len(s) > 0 { ... }
can be found in the strconv package: http://golang.org/src/pkg/strconv/atoi.go
if s != "" { ... }
can be found in the encoding/json package: http://golang.org/src/pkg/encoding/...
Java regex capturing groups indexes
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Capturing and grouping
Capturing group (pattern) creates a group that has capturing property.
A related one that you might often see (and use) is (?:pattern), which creates a group without capturing property, hence named non-capturi...
Abort makefile if variable not set
...ning an auxiliary function for that:
# Check that given variables are set and all have non-empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. (optional) Error message to print.
check_defined = \
$(strip $(foreach 1,$1, \
$(call __check_defin...
What does (x ^ 0x1) != 0 mean?
...expression is false if x == 1.
So the test is the same as:
if (x != 1)
and is therefore (arguably) unnecessarily obfuscated.
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Why not use always android:configChanges=“keyboardHidden|orientation”?
I was wondering why not use android:configChanges="keyboardHidden|orientation" in every (almost every ;)) activity?
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How do I get PyLint to recognize numpy members?
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@Peter 's solution working in Windows 7 x64 and Visual Studio Code 1.15.1!!
– BSP
Sep 4 '17 at 13:15
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