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Deleting all files in a directory with Python
... list of file names which end it '.bak'. The elements of the list are just strings.
Then you could use os.unlink to remove the files. (PS. os.unlink and os.remove are synonyms for the same function.)
#!/usr/bin/env python
import glob
import os
directory='/path/to/dir'
os.chdir(directory)
files=glo...
Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...' the matrix.
#'
#' @param data data.frame: input data
#' @param rowtitle string: row-dimension; name of the column in data, which distinct values should be used as row names in the output matrix
#' @param coltitle string: col-dimension; name of the column in data, which distinct values should be u...
What is the function of the push / pop instructions used on registers in x86 assembly?
...e terms. For read-only locals spilled to the stack, the main cost is just extra load uops (sometimes memory operands, sometimes with separate mov loads). For spilled non-const variables, the store-forwarding round trips are a lot of extra latency (an extra ~5c vs. forwarding directly, and the stor...
Difference between single and double square brackets in Bash
...nsion.
expr a \< b > /dev/null: POSIX equivalent², see: How to test strings for lexicographic less than or equal in Bash?
&& and ||
[[ a = a && b = b ]]: true, logical and
[ a = a && b = b ]: syntax error, && parsed as an AND command separator cmd1 &&...
Collections.emptyMap() vs new HashMap()
...e this, and does not allow null references:
public ResultSet executeQuery(String query, Map<String, Object> queryParameters);
If you have a query that doesn't take any parameters, it's certainly a bit wasteful to create a HashMap, which involves allocating an array, when you could just pass...
How can I use different certificates on specific connections?
...eArrayInputStream derInputStream = new ByteArrayInputStream(app.certificateString.getBytes());
CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate) certificateFactory.generateCertificate(derInputStream);
String alias = "alias";//ce...
The entitlements specified…profile. (0xE8008016). Error iOS 4.2
... run the HealthKit "fit" app for iOS8 - there was an additional identifier string in the entitlements file. Removing it allowed the project to run after following other steps mentioned in this thread
– Alex Stone
Jul 17 '14 at 18:38
...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
...
Yes, it's certainly "possible"; Here's the pseudo-code:
string MakeRegexFromExamples(<listOfPosExamples>, <listOfNegExamples>)
{
if HasIntersection(<listOfPosExamples>, <listOfNegExamples>)
return <IntersectionError>
string regex = "";
...
Flexbox Not Centering Vertically in IE
... 2019, the best solution by far is the one by @sergey-fedirko requiring no extra HTML elements and no hard heights ;) This one: stackoverflow.com/a/54796082/134120
– AsGoodAsItGets
Mar 12 '19 at 12:19
...
Installing Ruby Gem in Windows
...uby 2.0.0p353 (2013-11-22) [i386-mingw32]
For Ruby 2.4 or later, run the extra installation at the end to install the DevelopmentKit. If you forgot to do that, run ridk install in your windows console to install it.
For earlier versions:
Download and install DevelopmentKit from the same downloa...