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Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...s not apply to the specific case linked, but it does apply to the question title and may be interesting to future readers:
Due to finite precision, repeated floating-point addition is not equivalent to multiplication. Consider:
float const step = 1e-15;
float const init = 1;
long int const count ...
MS-DOS Batch file pause with enter key
Is it possible in MS-DOS batch file to pause the script and wait for user to hit enter key?
5 Answers
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Choosing a file in Python with simple Dialog
...uce a dependency on any python GUI toolkits, but I wanted some of my debug scripts to be parameterized by input files and wanted to visually prompt the user for a file if they didn't specify one on the command line. Zenity was a perfect fit. To achieve this, invoke "zenity --file-selection" using th...
Compare integer in bash, unary operator expected
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Your piece of script works just great. Are you sure you are not assigning anything else before the if to "i"?
A common mistake is also not to leave a space after and before the square brackets.
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How to send only one UDP packet with netcat?
... -q1 option on my netcat. Instead I used the -w1 option. Below is the bash script I did to send an udp packet to any host and port:
#!/bin/bash
def_host=localhost
def_port=43211
HOST=${2:-$def_host}
PORT=${3:-$def_port}
echo -n "$1" | nc -4u -w1 $HOST $PORT
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Creation timestamp and last update timestamp with Hibernate and MySQL
...e(name = "post")
public class Post extend BaseEntity {
private String title;
@OneToMany(
mappedBy = "post",
cascade = CascadeType.ALL,
orphanRemoval = true
)
private List<PostComment> comments = new ArrayList<>();
@OneToOne(
mappedBy...
Where does Jenkins store configuration files for the jobs it runs?
...nkins installation folder, you could create a simple jenkins job and run a script that tars all the config files for the jobs: "tar -zcvf jenkins-jobs-configs.tar.gz $(find ${JENKINS_HOME}/jobs -name config.xml -maxdepth 2) ". You could then archive jenkins-jobs-configs.tar.gz
...
What is the “-d” in “npm -d install”?
...argument. For example, this issue refers to doing npm -d install coffee-script . There are a few other pages that also refer to this syntax, including the install instructions for at least one npm package.
...
Creating an empty file in Ruby: “touch” equivalent?
... When is "at some point" going to happen? At the end of the script, or immediately because it hasn't been assigned to any variable? I'm creating the file so other processes on the system can start working with it immediately, and they will be blocked if the file handle is still open f...
Why use 'virtual' for class properties in Entity Framework model definitions?
...ect because what is deemed "correct" doesn't merely depend on the question title. I imagine most people, myself and OP included, first deal with virtual properties through Entity Framework - even tho it's not explicit in OP's title. The accepted answer is so because it touches on the Entity Framewor...