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setState vs replaceState in React.js
...components are setting their states frequently.
I asserted this with this test case.
If your current state is {a: 1}, and you call this.setState({b: 2}); when the state is applied, it will be {a: 1, b: 2}. If you called this.replaceState({b: 2}) your state would be {b: 2}.
Side note: State isn...
bundler vs RVM vs gems vs RubyGems vs gemsets vs system ruby [closed]
...s are to Java. Inside a gem file, you find Ruby code (.rb files), but also tests, and a special file giving information on the gem itself, such as its name, dependencies and version (gemspec). Any Ruby project can define the gems it needs via a Gemfile that just need to declare dependencies. Rubygem...
What is the Python 3 equivalent of “python -m SimpleHTTPServer”
... utils, 2to3 accepts stdin if the argument passed is -. Therefore, you can test without creating any files like so:
$ 2to3 - <<< "import SimpleHTTPServer"
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bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need
... Soup and lxml, which both installed successfully and work with a separate test file located here . In the Python script that causes this error, I have included this line:
from pageCrawler import comparePages
And in the pageCrawler file I have included the following two lines:
from bs4 i...
How to remove folders with a certain name
...according to your wishes, as follows:
find . -name a -exec rm -rf {} \;
Test it first using ls to list:
find . -name a -exec ls {} \;
To ensure this only removes directories and not plain files, use the "-type d" arg (as suggested in the comments):
find . -name a -type d -exec rm -rf {} \;
...
Mac OSX Lion DNS lookup order [closed]
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Thanks so much for this. Waiting 10-30 seconds to test changes to my code was driving me crazy and you saved me a ton of time by not having to figure this out myself.
– Zack Angelo
Aug 13 '11 at 16:34
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preventDefault() on an tag
...
This is a non-JQuery solution I just tested and it works.
<html lang="en">
<head>
<script type="text/javascript">
addEventListener("load",function(){
var links= document.getElementsByTagName("a");
for (var i=0;i<links.length;i++){
...
How can I remove all my changes in my SVN working directory?
...ert the current directory and everything under it and then update to the latest version.
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Which is better, return value or out parameter?
...out parameters are slightly harder to use with reflection and usually make testing harder too. (More effort is usually put into making it easy to mock return values than out parameters). Basically there's nothing I can think of that they make easier...
Return values FTW.
EDIT: In terms of what's g...
How to grep (search) committed code in the Git history
...dded, removed, or changed.
Take this commit as an example:
diff --git a/test b/test
index dddc242..60a8ba6 100644
--- a/test
+++ b/test
@@ -1 +1 @@
-hello hello
+hello goodbye hello
Because the number of times "hello" appears in the file is the same before and after this commit, it will not mat...