大约有 15,208 项符合查询结果（耗时：0.0344秒） [XML]
Extract a substring according to a pattern
...plit
sapply(strsplit(string, ":"), "[", 2)
## [1] "E001" "E002" "E003"
3) read.table
read.table(text = string, sep = ":", as.is = TRUE)$V2
## [1] "E001" "E002" "E003"
4) substring
This assumes second portion always starts at 4th character (which is the case in the example in the question):
substri...
List comprehension vs map
... kibash on Alex's infinite style points, but sometimes map seems easier to read to me: data = map(str, some_list_of_objects). Some other ones... operator.attrgetter, operator.itemgetter, etc.
– Gregg Lind
Aug 8 '09 at 16:06
...
float64 with pandas to_csv
I'm reading a CSV with float numbers like this:
2 Answers
2
...
Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes
...
I know this has already been answered. But I would like to add my solution as it may helpful for others in the future..
A common key error is: Permission denied (publickey). You can fix this by using keys:add to notify Heroku of your new key....
What are Transient and Volatile Modifiers?
...es to the field should always be synchronously flushed to memory, and that reads of the field should always read from memory. This means that fields marked as volatile can be safely accessed and updated in a multi-thread application without using native or standard library-based synchronization. S...
Why are there no ++ and -- operators in Python?
...
I see the much bigger concern being readability and predictability. Back in my C days, I saw more than enough bugs stemming from misunderstandings about the distinction between i++ and ++i...
– Charles Duffy
Jul 17 '13 at ...
How do I import .sql files into SQLite 3?
...
From a sqlite prompt:
sqlite> .read db.sql
Or:
cat db.sql | sqlite3 database.db
Also, your SQL is invalid - you need ; on the end of your statements:
create table server(name varchar(50),ipaddress varchar(15),id init);
create table client(name varcha...
Fancybox doesn't work with jQuery v1.9.0 [ f.browser is undefined / Cannot read property 'msie' ]
....msie instances, if any), thanks joofow
... that's it!
Or download the already patched version from HERE (UPDATED March 19, 2013 ... thanks fairylee for pointing out the extra closing bracket)
NOTE: this is an unofficial patch and is unsupported by Fancybox's author, however it works as is. You m...
How to iterate through all git branches using bash script
...)
return $( test -n "${HIST_DIFF}" )
}
print_different_branches () {
read -r -a ARGS <<< "${@}"
LOCAL=${ARGS[-1]?}
for REMOTE in "${SOME_REMOTE_BRANCHES[@]}"; do
if has_different_history "${LOCAL}" "${REMOTE}"; then
# { echo; echo; get_history_differences "${LOCAL}" "${R...
How to convert an object to a byte array in C#
...at you're trying to serialize is something that you have written, or has already been pre set up to be serialized.
– Hexum064
Nov 20 '15 at 17:23
3
...