大约有 15,475 项符合查询结果（耗时：0.0234秒） [XML]
What are the main performance differences between varchar and nvarchar SQL Server data types?
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@Thomas Harlan A simple test demonstrates to me that there is no tangible difference between joining nvarchar to varchar vs converting nvarchar to varchar and joining to varchar. Unless of course you meant being consistent in column datatypes, not i...
Android SDK installation doesn't find JDK
... that the likely Windows haters that coded this never bothered to actually test it, and their Unix forwardslashes weren't converted to Windows backslashes.
– Kenton Price
May 20 '12 at 1:38
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Generate a heatmap in MatPlotLib using a scatter data set
...as np
import numpy.random
import matplotlib.pyplot as plt
# Generate some test data
x = np.random.randn(8873)
y = np.random.randn(8873)
heatmap, xedges, yedges = np.histogram2d(x, y, bins=50)
extent = [xedges[0], xedges[-1], yedges[0], yedges[-1]]
plt.clf()
plt.imshow(heatmap.T, extent=extent, or...
How do I use su to execute the rest of the bash script as that user?
...d all uses bash. Effectively, this script is runned twice. At first script test it is root, then prepare environment, and change user by su. But do it with exec command, then there is only single script instance. With second loop, phrase if/fi is ommited, then script directly do prepared action. In ...
How to enable PHP short tags?
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We have a PHP coding test and occasionally receive submissions where the <?= short tag has been used. Unfortunately the assumption that this style is in use everywhere is a little naive and often comes from developers brought up on a diet of A...
How to use Git Revert
...e clear, with a log like this:
# git log --oneline
cb76ee4 wrong
01b56c6 test
2e407ce first commit
Using git revert cb76ee4 will by default bring your files back to 01b56c6 and will add a further commit to your history:
8d4406b Revert "wrong"
cb76ee4 wrong
01b56c6 test
2e407ce first commit
gi...
How to access parent Iframe from JavaScript
...imply a matter of iterating through the parent window's frames[] array and testing each frame's contentWindow against the window in which your code is running. Example:
var arrFrames = parent.document.getElementsByTagName("IFRAME");
for (var i = 0; i < arrFrames.length; i++) {
if (arrFrames[i]...
Do Google refresh tokens expire?
I have used the refresh token several times in just a short period for testing purposes, but I wonder whether Google refresh tokens ever expire? Can I use the same refresh token to get another access token again and again for a long period (a week or even months)?
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How to monitor network calls made from iOS Simulator
...Github.
The docs contain a very helpful intro to loading a cert into your test device to view HTTPS traffic.
Not quite as GUI-tastic as Charles, but it does everything I need and its free and maintained.
Good stuff, and pretty straightforward if you've used some command line tools before.
UPDATE:...
Making macOS Installer Packages which are Developer ID ready
...ponents.plist" \
--scripts "./Package/Scripts" \
--identifier "com.test.pkg.HelloWorld" \
--version "$VERSION" \
--install-location "/" \
"${BUILT_PRODUCTS_DIR}/HelloWorld.pkg"
pkgbuild --root "${BUILT_PRODUCTS_DIR}/Helper.app" \
--component-plist "./Package/HelperAppComponen...