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Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr
...ing so i had to run open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
That didnt work for me at first because the version of CommandLineTools i had installed did not have the "Packages" folder. So i uninstalled and reinstalled like this:
rm -rf /Library/Devel...
join list of lists in python [duplicate]
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@ZachEstela, I'm happy to see someone call this unpythonic. It seems like many techniques others like to call pythonic are not easily understood at first glance. Readability is one of the things that makes Python attractive to me. This solution is cool, and pro...
What's the difference between TRUNCATE and DELETE in SQL
...nces highlighted below.
General Overview
If you want to quickly delete all of the rows from a table, and you're really sure that you want to do it, and you do not have foreign keys against the tables, then a TRUNCATE is probably going to be faster than a DELETE.
Various system-specific issues h...
jQuery hasAttr checking to see if there is an attribute on an element [duplicate]
...is).attr('name') ) != 'undefined' ) { // ... } since undefined can actually be redefined using a simple: undefined = 1
– Shane Tomlinson
Nov 22 '10 at 12:34
7
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psql: FATAL: Ident authentication failed for user “postgres”
I have installed PostgreSQL and pgAdminIII on my Ubuntu Karmic box.
23 Answers
23
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What is the best way to get all the divisors of a number?
... i += 1
if i >= nfactors:
return
The overall efficiency of this algorithm will depend entirely on the efficiency of the factorGenerator.
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How to add a button to UINavigationBar?
...= CGRectMake(0, 0, 32, 32);
[button setImage:[UIImage imageNamed:@"settings_b.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(openView) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *barButton=[[UIBarButtonItem alloc] init];
[barButton setCustomView:bu...
Java switch statement: Constant expression required, but it IS constant
....4 Final Variables which defines a "constant variable" as follows:
We call a variable, of primitive type or type String, that is final and initialized with a compile-time constant expression (§15.28) a constant variable. Whether a variable is a constant variable or not may have implications wit...
How can I delete a service in Windows?
I have a couple old services that I want to completely uninstall. How can I do this?
13 Answers
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How do I split a string with multiple separators in javascript?
...ntation of JavaScript in Java: mozilla.org/rhino (... or "sudo apt-get install rhino").
– Aaron Maenpaa
Mar 16 '09 at 11:39
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