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How do I check if file exists in Makefile so I can delete it?
... SHELL := /opt/local/bin/bash
OS_X := true
else ifneq (,$(wildcard /etc/redhat-release))
OS_RHEL := true
else
OS_DEB := true
SHELL := /bin/bash
endif
Update:
I found a way which is really working for me:
ifneq ("$(wildcard $(PATH_TO_FILE))","")
FILE_EXISTS = 1
else
...
Is this the right way to clean-up Fragment back stack when leaving a deeply nested stack?
...ause are loading the Fragment calling onCreateView(), onActivityCreated(), etc. Restoring and Destroing a Fragment instantly is bad. The Fragment can register a receiver for example. This affects the performance.
– VasileM
May 10 '19 at 17:35
...
Best way to get InnerXml of an XElement?
...tween the two. element.Nodes() gives you everything like XText, XAttribute etc, but XElement only an Element.
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Checkstyle vs. PMD
...u during your programming by checking your coding style i.e braces, naming etc. Simple things but very numerous!
PMD will help you by checking more complicate rules like during the design of your classes, or for more special problems like implementing correctly the clone function. Simply, PMD will ...
Are HTTPS headers encrypted?
... header; the browser knows some header information (content type, unicode, etc); and browser history, password management, favorites/bookmarks, and cached pages will all contain the querystring. Server logs on the remote end can also contain querystring as well as some content details.
Also, the U...
java.lang.OutOfMemoryError: Java heap space
...the root cause with help of profiling tools like MAT, Visual VM , jconsole etc. Once you find the root cause, fix the leaks.
Important notes from oracle article
Cause: The detail message Java heap space indicates object could not be allocated in the Java heap. This error does not necessarily i...
PostgreSQL ERROR: canceling statement due to conflict with recovery
...ndby_archive_delay and max_standby_streaming_delay to some sane value:
# /etc/postgresql/10/main/postgresql.conf on a slave
max_standby_archive_delay = 900s
max_standby_streaming_delay = 900s
This way queries on slaves with a duration less than 900 seconds won't be cancelled. If your workload req...
What does %s mean in a python format string?
...e Format Specifiers or placeholders for formatting strings/decimals/floats etc.
MOST common used Format specifier:
%s : string
%d : decimals
%f : float
Self explanatory code:
name = "Gandalf"
extendedName = "the Grey"
age = 84
IQ = 149.9
print('type(name):', type(name)) #type(name): <class...
How do you mock out the file system in C# for unit testing?
...nterface IFileSystem {
bool FileExists(string fileName);
DateTime GetCreationDate(string fileName);
}
and creating a 'real' implementation which uses
System.IO.File.Exists() etc. You can then mock this interface using a
mocking framework; I recommend Moq.
Edit: somebody's done this and kind...
How to parse a query string into a NameValueCollection in .NET
...ded to support controller parameters such as int[], IEnumerable<int> etc (such params might be used to support multiple checkboxes) see "Multiple occurrences of the same query string variable are consolidated in one entry" as per MS site. A handcrafted version of the method might be your only ...