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How to get error message when ifstream open fails
...r between the execution of the f.open and use of errno.
On system with POSIX standard:
errno is thread-local; setting it in one thread does not affect its
value in any other thread.
Edit (thanks to Arne Mertz and other people in the comments):
e.what() seemed at first to be a more C++-...
How to pre-populate the sms body text via an html link
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It turns out this is 100% possible, though a little hacky.
If you want it to work on Android you need to use this format:
<a href="sms:/* phone number here */?body=/* body text here */">Link</a>
If you want it to work on iOS, you need t...
How do I set cell value to Date and apply default Excel date format?
...rmats (not just date formats) that Excel knows. I'm sticking with one of those to use as my parameter to the getFormat() method shown in the snippet above.
– Jim Tough
Apr 27 '11 at 12:08
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Hiding a password in a python script (insecure obfuscation only)
...d it out. For anyone else who cares: If a script has a setuid bit set the OS will 'pass' the setuid bit to the interpreter. Unfortunately, there are massive gaping security holes so most modern distros turn off setuid for scripts.
– Youarefunny
Apr 22 '11 at ...
What is a message pump?
In this thread (posted about a year ago) there is a discussion of problems that can come with running Word in a non-interactive session. The (quite strong) advice given there is not to do so. In one post it is stated "The Office APIs all assume you are running Office in an interactive session on...
Is there an easy way to check the .NET Framework version?
...ryKey installed_versions = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\NET Framework Setup\NDP");
string[] version_names = installed_versions.GetSubKeyNames();
//version names start with 'v', eg, 'v3.5' which needs to be trimmed off before conversion
double Framework = Convert.ToDouble(ver...
How to export a Vagrant virtual machine to transfer it
... Trying to be that clean, foresightful admin... You don't have to put an OS install iso in your git repo do you? Are you suggesting that, for example. using ansible, your repo would contain the Vagrantfile and an ansible playbook. The Vagrantfile would 1. download a basebox from vagrantcloud 2. r...
Why do you not use C for your web apps?
...s having a look at a few different web servers this morning when I came across G-WAN . As I understand, its a web server written in C and you have to make use of it by writing your websites/webapps in C. One clear benefit is speed as the G-WAN site suggests.
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How to create a CPU spike with a bash command
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You can also do
dd if=/dev/zero of=/dev/null
To run more of those to put load on more cores, try to fork it:
fulload() { dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null & }; fulload; read; killall dd
Repea...
How do I rename a repository on GitHub?
I wanted to rename one of my repositories on GitHub, but I got scared when a big red warning said:
12 Answers
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