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How to create a tuple with only one element
...x has some extra quirks to accommodate these. Empty tuples are constructed by an empty pair of parentheses; a tuple with one item is constructed by following a value with a comma (it is not sufficient to enclose a single value in parentheses). Ugly, but effective.
If you truly hate the trailing co...
Does free(ptr) where ptr is NULL corrupt memory?
...tr);
Description
The free function causes the space pointed to by ptr to be deallocated, that is, made
available for further allocation. If ptr is a null pointer, no action occurs.
See ISO-IEC 9899.
That being said, when looking at different codebases in the wild, you'll notice peo...
How to test Spring Data repositories?
...Criteria API as well as the meta.model.
We verify manually defined queries by asking the EntityManager to create a Query instance for those (which effectively triggers query syntax validation).
We inspect the Metamodel for meta-data about the domain types handled to prepare is-new checks etc.
All ...
How to avoid overflow in expr. A * B - C * D
...st general solution is to use a representation that can't overflow, either by using a long integer library (e.g. http://gmplib.org/) or representing using a struct or array and implementing a kind of long multiplication (i.e. separating each number to two 32bit halves and performing the multiplicati...
“aapt” IOException error=2, No such file or directory" why can't I build my gradle on jenkins?
...
building chrome on Ubuntu 14.04 and this helped get me by the same error I was having with aapt. Note ldd aapt now works, and shows dependencies. Previously it stated that the program wasn't a dynamic executable "not a dynamic executable". Now on to the next problem!
...
How to check if a Ruby object is a Boolean
...check if an object is a boolean easily. Is there something like this in Ruby?
9 Answers
...
Fit background image to div
...can achieve this with the background-size property, which is now supported by most browsers.
To scale the background image to fit inside the div:
background-size: contain;
To scale the background image to cover the whole div:
background-size: cover;
JSFiddle example
There also exists a filte...
Git SVN error: a Git process crashed in the repository earlier
...ck file like Schwern stated will solve this
problem.
You can remove it by running rm -f ./.git/index.lock
The rm command is used to remove (delete) files and directories.
The -f stands for force which tells your computer to remove the files without prompting for confirmation
...
In SQL Server, when should you use GO and when should you use semi-colon ;?
...
A MERGE statement must be terminated by a semi-colon.
– onedaywhen
Sep 15 '10 at 7:43
15
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ADB Install Fails With INSTALL_FAILED_TEST_ONLY
...the apk to device first.
$ adb push bin/hello.apk /tmp/
5210 KB/s (825660 bytes in 0.154s)
$ adb shell pm install /tmp/hello.apk
pkg: /tmp/hello.apk
Failure [INSTALL_FAILED_TEST_ONLY]
$ adb shell pm install -t /tmp/hello.apk
pkg: /tmp/hello.apk
Success
I was able to reproduce the same...