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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
... well, you get the picture. It has been pointed out that sort -R doesn't really shuffle but instead sort items according to their hash value.
[Editor's note: sort -R almost shuffles, except that duplicate lines / sort keys always end up next to each other. In other words: only with unique input lin...
How to discard local commits in Git?
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git reset --hard origin/master
will remove all commits not in origin/master where origin is the repo name and master is the name of the branch.
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How to remove a package in sublime text 2
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If you installed with package control, search for "Package Control: Remove Package" in the command palette (accessed with Ctrl+Shift+P). Otherwise you can just remove the Emmet directory.
If you wish to use a custom caption to access c...
How do I “git blame” a deleted line?
...an I find when a line that existed in a specific previous commit was eventually deleted. I'm thinking bisect , but I was hoping for something handier.
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mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
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You have to set "slave okay" mode to let the mongo shell know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from ...
how to edit .csproj file
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The CSPROJ file, saved in XML format, stores all the references for your project including your compilation options. There is also a SLN file which stores information about projects that make up your solution.
If you are using Visual Studio and have the need to view or...
How to convert a DOM node list to an array in Javascript?
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Using spread (ES2015), it's as easy as: [...document.querySelectorAll('p')]
(optional: use Babel to transpile the above ES6 code to ES5 syntax)
Try it in your browser's console and see the magic:
for( links of [...document.links] )
console.log(links);
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How to fix: “HAX is not working and emulator runs in emulation mode”
...r has to be lower or equal to the memory usage you have set during the installation of HAXM. You can launch its installation again to modify it.
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Add file extension to files with bash
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second one adds an extension on all files, not just extensionless ones
– Jeff
Mar 24 '15 at 15:55
5
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How to join (merge) data frames (inner, outer, left, right)
...nner join: merge(df1, df2) will work for these examples because R automatically joins the frames by common variable names, but you would most likely want to specify merge(df1, df2, by = "CustomerId") to make sure that you were matching on only the fields you desired. You can also use the by.x and b...