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Check if a program exists from a Makefile
...r to /dev/null.
Then you may check the result using ifdef, ifndef, $(if) etc.
YOUR_PROGRAM_VERSION := $(shell your_program --version 2>/dev/null)
all:
ifdef YOUR_PROGRAM_VERSION
@echo "Found version $(YOUR_PROGRAM_VERSION)"
else
@echo Not found
endif
As a bonus, the output (such as ...
How to amend older Git commit? [duplicate]
...ive history
Improve your old commit using git add (git add -i, git stash etc.) now. You can even split your old commit into two or more.
git commit # recreate commit B (result = B*)
git cherry-pick C # copy C to our new branch (result = C')
Intermediate result:
x - A - B - C
| ...
Replacement for “rename” in dplyr
...re is that data is copied. No big deal if this is for playing, i.e. mtcars etc ... but quite dramatic if you deal with substantial data. check dplyr:::changes(mtcars, dat)
– Romain Francois
Feb 2 '14 at 0:10
...
Why not be dependently typed?
... a weaker requirement. We must check. If we must have
distinct type, kind, etc levels, we can at least make sure everything
at the type level and above can always be promoted. It would be great
just to re-use the polymorphism we already have for types, rather than
re-inventing polymorphism at the ki...
What is the idiomatic Go equivalent of C's ternary operator?
...pective; they need to extend the language specification, parser, compiler, etc with extra syntax that isn't used anywhere else in the language for some syntactic sugar that is a potential readability footgun. Go is designed for reading, and while most C-developers may be familiar enough with ternari...
How do I compare two strings in Perl?
...
@Zon except that return values for eq, gt, lt etc are not correct ... They return true or false. Only cmp returns specific numeric values.
– Sinan Ünür
Apr 1 '15 at 16:58
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Convert Existing Eclipse Project to Maven Project
...e project. Rather, it gives the user an option of selecting dependencies, etc., which may be difficult if the user doesn't have much experience with Maven.
– Kaleb Pederson
Mar 15 '10 at 18:58
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How to compare types
...typeField and I want to know if it is System.String , System.DateTime , etc., but typeField.Equals(System.String) doesn't work.
...
IIS 500.19 with 0x80070005 The requested page cannot be accessed because the related configuration d
...st Read, and, depending on your app, maybe Write.
Above, you mention IUSR etc. not being in the properties for web.config. If by that you mean that IUSR is not listed in the security tab of the file then it's a good thing. One doesn't want to give IUSR any kind of permission to web.config. The role...
Simple (non-secure) hash function for JavaScript? [duplicate]
...he 32 character hexadecimal string that's the typical output of MD5, SHA1, etc. It doesn't have to be cryptographically secure, just reasonably resistant to collisions. (My initial use case is URLs, but I'll probably want to use it on other strings in the future.)
...