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Why do most C developers use define instead of const? [duplicate]
...the preprocessor: you can use it with #ifdef to do conditional compilation based on its value, or use the stringizing operator # to get a string with its value. And as the compiler knows its value at compile time it may optimize code based on that value.
For example:
#define SCALE 1
...
scaled_x...
How do I test for an empty string in a Bash case statement?
I have a Bash script that performs actions based on the value of a variable. The general syntax of the case statement is:
3...
Aggregate / summarize multiple variables per group (e.g. sum, mean)
...('.*[0-9]')), sum)
# summarising a specific set of non-grouping variables based on condition (class)
df2 <- df1 %>% group_by(year, month) %>% summarise_if(is.numeric, sum)
The result of the latter two options:
year month x1 x2
<dbl> <dbl> <dbl>...
Ansible: Set variable to file content
...suggesting it)
vars:
amazon_linux_ami: "ami-fb8e9292"
user_data_file: "base-ami-userdata.sh"
tasks:
- name: Load data
slurp:
src: "{{ user_data_file }}"
register: slurped_user_data
- name: Decode data and store as fact # You can skip this if you want to use the right hand side directly.....
What is the scope of variables in JavaScript?
...n have block scope in strict mode.
Overview
Scope is the region of the codebase over which an identifier is valid.
A lexical environment is a mapping between identifier names and the values associated with them.
Scope is formed of a linked nesting of lexical environments, with each level in the nest...
Eclipse returns error message “Java was started but returned exit code = 1”
...erver_10.3
So a 32-bit Java for a 32-bit Eclipse, but still exit code 1. Based on all answers I had seen here, and the only change being a new laptop with Windows 10, the only possible explanation was that the new OS and the Eclipse were disagreeing on something. So I started playing around with e...
NUnit's Assert.Equals throws exception “Assert.Equals should not be used for assertions”
...ov Because that is impossible. You can't override a virtual method from a base class with a private one.
– Odrade
Jun 30 '15 at 21:01
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Missing XML comment for publicly visible type or member
... more understandable so you use a tool that generates documentation solely based on the method name and arguments types. Does it make sense to you? The user can see the name and types of the arguments, add comment to DateTime date- The date really doesn't help.
– gdoron is supp...
Check for internet connection availability in Swift
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As @Isuru said, this is based on stackoverflow.com/a/25623647/1187415, which has now been updated for Swift 2.
– Martin R
Jun 10 '15 at 1:52
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Groovy / grails how to determine a data type?
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instanceof is great for filtering based on interface.
– cdeszaq
Mar 12 '13 at 13:15
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