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How to convert a string to integer in C?
... wrong as unsafe. atoi() works if input is valid. But what if you do atoi("cat")? strtol() has defined behavior if the value cannot be represented as a long, atoi() does not.
– Daniel B.
Jul 22 '15 at 19:13
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Passing command line arguments to R CMD BATCH
...st.Rout, will show that the argument 4 has been successfully passed to R:
cat test.Rout
> args <- commandArgs(trailingOnly = F)
> myargument <- args[length(args)]
> myargument <- sub("-","",myargument)
> print(myargument)
[1] "4"
> q(save="no")
> proc.time()
user system...
Wget output document and headers to STDOUT
...Note the trailing -. This is part of the normal command argument for -O to cat out to a file, but since we don't use > to direct to a file, it goes out to the shell. You can use -qO- or -qO -.
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How to assign the output of a command to a Makefile variable
...R=$(shell echo whatever)
me@Zack:~$make
MY_VAR IS whatever
me@Zack:~$ cat Makefile
MY_VAR := $(shell echo whatever)
all:
@echo MY_VAR IS $(MY_VAR)
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How to urlencode data for curl command?
...part should begin with a name followed by a separator and a content specification.
Example usage:
curl \
--data-urlencode "paramName=value" \
--data-urlencode "secondParam=value" \
http://example.com
See the man page for more info.
This requires curl 7.18.0 or newer (released Janua...
What is the difference between static func and class func in Swift?
...c identity() -> String {
// return "I'm once a dog but now I'm a cat"
// }
// Can not override a "class func", but redeclare is ok
func talk() -> String {
return "I'm a bulldog, and I don't woof."
}
// Same as "class func"
func eat() -> String {
...
How to make HTML table cell editable?
...e one of the following values:
true or the empty string, which indicates that the element must be editable;
false, which indicates that the element must not be editable.
If this attribute is not set, its default value is inherited from its
parent element.
This attribute is a...
How to check whether a file or directory exists?
...ning here. Go uses panic for an actual "exception" like object. You can "catch" with a call to recover. Explicitly returning an err as a second return value is an extremely common, idiomatic Go technique. See: golang.org/doc/effective_go.html#errors
– Chris Pfohl
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How to keep/exclude a particular package path when using proguard?
... Proguard completely ignore package
Prevent a directory from proguard obfuscation
The problem with this solution is that there is still some level of obfuscation happening, which can break your code. You can see the mapping in the mapping print out:
java.lang.String toString() -> toString
int ...
How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
...ote 2: You might want to add the -chain option to preserve the full certificate chain. (Thanks Mafuba)
Step two: Convert the pkcs12 file to a Java keystore
keytool -importkeystore \
-deststorepass [changeit] -destkeypass [changeit] -destkeystore server.keystore \
-srckeystore serve...