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How to add /usr/local/bin in $PATH on Mac
...se it's on the right hand side of an assignment, but in general, and especially on Macs with their tradition of spacy pathnames, expansions like $PATH should be double-quoted as "$PATH".
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imp...
Remove duplicated rows using dplyr
... @hadley I like the unique() and distinct() function, however, they all remove the 2nd duplicate from the data frame. what if I want to have all 1st encounters of the duplicate value removed? How could this be done? Thanks for any help!
– FlyingDutch
Feb...
How to pass macro definition from “make” command line arguments (-D) to C source code?
I usually pass macro definitions from "make command line" to a "makefile" using the option :
-Dname=value. The definition is accessible inside the makefile.
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Can I run javascript before the whole page is loaded?
... script execution is complete (because the script might do document.write calls to output markup that the parser should handle).
That's the default behavior, but you have a few options for delaying script execution:
Use JavaScript modules. A type="module" script is deferred until the HTML has bee...
ReactJS: Modeling Bi-Directional Infinite Scrolling
...following:
Overview
Make a <List> component that takes an array of all children. Since we do not render them, it's really cheap to just allocate them and discard them. If 10k allocations is too big, you can instead pass a function that takes a range and return the elements.
<List>
{...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
...ing. You should not rely on unauthenticated encryption for security, especially since the code as provided is vulnerable to padding oracle attacks.
See also:
https://stackoverflow.com/a/30189841/2224584
https://stackoverflow.com/a/30166085/2224584
https://stackoverflow.com/a/30159120/2224584
Al...
How do I script a “yes” response for installing programs?
...mazon Linux instances and I have a couple scripts to populate data and install all the programs I work with, but a couple of the programs ask:
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What's the meaning of Base SDK, iOS deployment target, Target, and Project in xcode
...ect can have multiple targets and you might not want the same settings for all targets. The project-level settings override the default settings and the target-level settings override the project-level settings.
For example I have projects with both OSX and iOS targets and some are ARC and some ar...
#define macro for debug printing in C?
.... } while (0) idiom ensures that the code acts like a statement (function call). The unconditional use of the code ensures that the compiler always checks that your debug code is valid — but the optimizer will remove the code when DEBUG is 0.
If you want to work with #ifdef DEBUG, then change th...
How to RSYNC a single file?
... anywhere on the server by just specifying it's path? The man page isn't really clear about that.
– user1115652
Jun 18 '16 at 9:11
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