大约有 46,000 项符合查询结果（耗时：0.0694秒） [XML]
What is in your Mathematica tool bag? [closed]
...e one liner:
SelectEquivalents[hamlst,
#[[;; 3]] &,
#[[{4, 5}]] -> (Complex @@ #[[6 ;;]]) &,
{#1, SparseArray[#2]} &]
Honestly, this is my Swiss Army Knife, and it makes complex things very simple. Most of my other tools are somewhat domain specific, so I'll p...
Evenly distributing n points on a sphere
...answer here (and using Python):
> cat ll.py
from math import asin
nx = 4; ny = 5
for x in range(nx):
lon = 360 * ((x+0.5) / nx)
for y in range(ny):
midpt = (y+0.5) / ny
...
Should I impose a maximum length on passwords?
...
Passwords are hashed to 32, 40, 128, whatever length. The only reason for a minimum length is to prevent easy to guess passwords. There is no purpose for a maximum length.
The obligatory XKCD explaining why you're doing your user a disservice if you im...
How can I specify a branch/tag when adding a Git submodule?
... |
edited Jul 2 '19 at 21:43
Julius Smith
322 bronze badges
answered Nov 22 '09 at 9:19
...
Create Windows service from executable
...
474
To create a Windows Service from an executable, you can use sc.exe:
sc.exe create <new_ser...
How to reverse apply a stash?
...ges
$ git commit -am 'Initial commit'
[master (root-commit)]: created 1ff2478: "Initial commit"
1 files changed, 1 insertions(+), 0 deletions(-)
create mode 100644 messages
$ echo Hello again >>messages
$ git stash
$ git status
# On branch master
nothing to commit (working directory clea...
How to group time by hour or by 10 minutes
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answered Feb 24 '11 at 7:00
cndcnd
27.7k6060 gold badges164164 silver badges287287 bronze badges
...
Is there a JavaScript / jQuery DOM change listener?
...ilable solution, but they have been deprecated for performance reasons. DOM4 Mutation Observers are the replacement for deprecated DOM3 mutation events. They are currently implemented in modern browsers as MutationObserver (or as the vendor-prefixed WebKitMutationObserver in old versions of Chrome)...
@UniqueConstraint annotation in Java
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427
To ensure a field value is unique you can write
@Column(unique=true)
String username;
The @...
How do I force Postgres to use a particular index?
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104
Assuming you're asking about the common "index hinting" feature found in many databases, Postgre...