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Opposite of %in%: exclude rows with values specified in a vector
... variable V1 in a data frame D1 can have values represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
...
Have Grunt generate index.html for different setups
...automate environment configuration for future tasks.
Below are snippets from my Gruntfile.js.
ENV setup:
env : {
options : {
/* Shared Options Hash */
//globalOption : 'foo'
},
dev: {
NODE_ENV : 'DEVELOPMENT'
},
prod : {
NODE_ENV : 'PR...
The new syntax “= default” in C++11
...
We are creating new object in the memory started from address of variable x (instead of new memory allocation). This syntax is used to create object at pre-allocated memory. As in our case the size of B = the size of int, so new(&x)A() will create new object in the plac...
Disable a Maven plugin defined in a parent POM
...nterested.
The shortest form I found is further improvement on the example from λlex and bmargulies. The execution tag will look like:
<execution>
<id>TheNameOfTheRelevantExecution</id>
<phase/>
</execution>
2 points I want to highlight:
phase is set to no...
What is git actually doing when it says it is “resolving deltas”?
...hat deals with making sure all of that stays consistent.
Here's a chapter from the "Git Internals" section of the Pro Git book, which is available online, that talks about this.
share
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improve thi...
Using a custom typeface in Android
...ich I am creating.
I can individually change the typeface of each object from Code, but I have hundreds of them.
21 Answe...
Is it possible to remove inline styles with jQuery?
...splay', '');
and it'll automatically be removed for you.
Here's a quote from the docs:
Setting the value of a style property to an empty string — e.g. $('#mydiv').css('color', '') — removes that property from an element if it has already been directly applied, whether in the HTML style at...
Benefits of EBS vs. instance-store (and vice-versa) [closed]
I'm unclear as to what benefits I get from EBS vs. instance-store for my instances on Amazon EC2. If anything, it seems that EBS is way more useful (stop, start, persist + better speed) at relatively little difference in cost...? Also, is there any metric as to whether more people are using EBS now ...
Changing one character in a string
...probably:
text = "Z" + text[1:]
The text[1:] returns the string in text from position 1 to the end, positions count from 0 so '1' is the second character.
edit:
You can use the same string slicing technique for any part of the string
text = text[:1] + "Z" + text[2:]
Or if the letter only appe...
How do I purge a linux mail box with huge number of emails? [closed]
...
It is not a good praxis data manipulation from outside an application. If there is an option or command that can do the job, it is better to use it. As @timaschew answered, you can use the ‘d’ command inside the mail tool.
– pocjoc
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